| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 440089000 | Means for handling exhaust gas | 45 |
| 20080242164 | Marine engine exhaust system - A marine engine exhaust system is provided. One exemplary embodiment of the system includes first and second manifolds. A first gas is transferred through a first conduit from the first manifold and is isolated from cooling water through at least a portion of the first conduit. A second conduit is in fluid communication with the second manifold and allows a second gas to be transferred through that is isolated from cooling water through a portion of its length. The first and second conduits are in fluid communication with a third conduit in which the first and second gases merge. Cooling water is merged with either the first or second gas, or both, in the first and second conduits before the first gas and second gas merge in the third conduit. | 10-02-2008 |
| 20090156071 | ENGINE EXHAUST BYPASS SYSTEM FOR OCEAN VESSEL - A primary exhaust bypass for a water-borne vessel having a seat member and a closure member coupled to the seat member, wherein the seat and closure members are configured to seal against exhaust leakage in the closed position and to allow exhaust leakage in the opened condition, and a locking mechanism, wherein the bypass is configured to open when the vessel lists a predetermined amount. A method of bypassing a blocked primary exhaust system may include establishing a bypass exhaust route, providing a normally-closed bypass mechanism at a distal portion of the bypass exhaust route, and changing the orientation of the bypass mechanism with respect to gravity, which may allow the bypass mechanism to open. | 06-18-2009 |
| 20090197489 | EXHAUST INTAKE BONNET (EIB) FOR MARITIME EMISSIONS CONTROL SYSTEM - An improved Exhaust Intake Bonnet (EIB) for an Advanced Maritime Emissions Control System (AMECS) includes a shroud carried by a rigid upper frame and a lowerable and raisable rigid lower frame. The upper frame includes a peak with a duct for receiving exhaust gasses captured by the shroud and winches for lowering and raising the lower frame. The shroud is expandable when the lower frame is lowered and collapsible when the lower frame is raised and has a cinchable base. The AMECS is joined to a ship by positioning the EIB over a ship's exhaust stack using a deployment arm. The shroud is then lowered over the stack and then cinched around the stack to provide a soft attachment between the EIB and the ship's stack. Later, the steps are reversed to separate the AMECS from the ship. | 08-06-2009 |
| 20090233502 | Friction reducing pollution control system for marine vehicles - An exhaust redirect line in communication with an engine exhaust channel of a marine vehicle receiving exhaust gas. A blower unit in the exhaust redirect line directing the exhaust gas through the exhaust redirect line. A mixing chamber in communication with the exhaust redirect line receiving the engine exhaust gas. An injector unit in communication with the mixing chamber introducing a chemical agent, air and water into the mixing chamber to provide a treated exhaust gas. An output vane disposed on an exterior underside of a hull being in communication with the mixing chamber discharging the treated exhaust gas underneath the hull as a foam, whereby the engine exhaust gas is encapsulated and detoxified by the chemical agent in the foam to prevent the exhaust gas from entering the surrounding water and wherein the foam reduces friction between the hull and the surrounding water to improve engine efficiency. | 09-17-2009 |
| 20090270000 | Exhaust system of a marine vessel - An exhaust system for a marine propulsion device is configured to dispose two exhaust conduits in generally concentric overlapping relation with each other in order to minimize the potential cross sectional area of a leak path in the event that a seal fails. One of the exhaust conduits extends through a transom or other surface of a marine vessel and another exhaust conduit conducts exhaust gas from an engine to the exhaust conduit extending through the surface of the marine vessel. | 10-29-2009 |
| 20100041287 | GASKETED CONNECTION OF MARINE ENGINE EXHAUST OUTLET TO EXHAUST CONDUIT - A connecting flange comprises a generally open ended cylindrical body having an inlet adapted for receiving a gasket for providing a sealing connection with a turbocharger housing, and an outlet for connection to marine exhaust conduit. The connector inlet terminates in an end having a radially flared angularly disposed end wall adapted for mating abutting engagement with a correspondingly angled turbocharger housing end wall. The connector inlet end further includes circumferential axially recessed groove that receives spiral wound gasket in a configuration wherein the gasket forms redundant seals at a plurality of locations. The connector inlet structure cooperates with the turbo charger outlet structure to completely enclose the gasket thereby protecting the gasket from hot corrosive exhaust gases. A V-Band clamp is disposed in covering relation with the connector end wall and abutting turbocharger housing component to secure the connector to the turbocharger. | 02-18-2010 |
| 20100041288 | SUBMERGED EXHAUST DISCHARGE FOR MARINE VESSEL - A marine exhaust system adapted for discharging marine exhaust below the water line through at least one streamlined conformal discharge fitting attached to the vessel hull. Each discharge fitting comprises a low profile body attached to the vessel hull in relation with an exhaust discharge conduit terminating in a thru-hull opening so as to discharge marine exhaust into the discharge fitting body. The discharge fitting preferably includes a forward end and an aft end connecting a main discharge fitting body disposed in spaced relation with the underside of the vessel hull. The discharge fitting body defines an exhaust outlet disposed on outboard side thereof so as to allow exhaust gas to exit in an outward and aft flow such that corrosive exhaust gas does not flow over the vessel propellers. Forward and aft baffles are disposed within the discharge fitting body to direct and re-direct exhaust gas flow. By maintaining a streamlined and low-profile/conformal shape, reduction in overall hull hydrodynamics due to increased drag is minimized. | 02-18-2010 |
| 20100285708 | OUTBOARD ENGINE UNIT - Outboard engine unit includes: an anti-splash plate and an anti-cavitation plate provided on a gear case at a vertical interval from each other and extending horizontally from the gear case; an exhaust port provided in a side surface of the gear case for discharging exhaust gas from an engine; and a protruding section provided on the side surface of the gear case at a position located rearwardly of the exhaust port, the protruding section protruding laterally outwardly from the side surface for changing a direction of water flows flowing along the side surface. | 11-11-2010 |
| 20120083176 | Anti-Ingestion System for a Marine Drive - An anti-ingestion system is provided for a marine drive with a submerged exhaust outlet. An anti-ingestion valve is operated by differential pressure thereacross to a closed condition when the engine is operating in an on state and cooling water is being pumped through a water conduit to an exhaust mixing point, with the anti-ingestion valve blocking passage of cooling water therepast in the noted closed condition. The anti-ingestion valve is operated by differential pressure thereacross to an open condition when the engine is in an off state, and permits passage of air therethrough and communicates atmospheric pressure through the water conduit to the exhaust mixing point to relieve vacuum in the exhaust system. | 04-05-2012 |
| 20130130576 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders, an exhaust manifold, and an exhaust pipe. The exhaust manifold includes a first passage and a second passage. The first passage includes a plurality of first inflow ports into which exhaust gases flow from the plurality of cylinders, a first collecting portion that collects exhaust gases that have flowed into the plurality of first inflow ports, and a first exhaust port through which exhaust gases collected by the first collecting portion are discharged. The second passage includes a second inflow port into which exhaust gases flow and a second exhaust port through which exhaust gases that have flowed into the second inflow port are discharged. The exhaust pipe includes a connection passage through which the first exhaust port and the second inflow port are connected together. | 05-23-2013 |
| 20130130577 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 05-23-2013 |
| 20140106633 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage member, and an idle exhaust passage member. The exhaust passage member defines a main exhaust passage through which exhaust gases of the engine are guided to a main exhaust port disposed in the water, and also defines a portion of an idle exhaust passage through which exhaust gases in the main exhaust passage are guided to an idle exhaust port opened to the atmosphere. The idle exhaust passage member includes an upstream end connected to the exhaust passage member and a downstream end that defines the idle exhaust port and is disposed at a higher position than the upstream end. The idle exhaust passage member is made of a flexible material, and is integrally formed from the upstream end to the downstream end. | 04-17-2014 |
| 20140378014 | VESSEL - A vessel includes an outboard motor including an upstream exhaust port that emits exhaust, a hull including a rear portion on which the outboard motor is mounted, a cabin disposed above the hull, a downstream exhaust port disposed farther to a lateral side than the outboard motor, and an exhaust passage extending from the upstream exhaust port to the downstream exhaust port and guiding the exhaust from the upstream exhaust port to the downstream exhaust port. The cabin includes a windshield disposed in front of the outboard motor in a plan view. The height of the cabin from a rearmost end of the outboard motor is not less than ½ or about ½ of a horizontal distance in a front/rear direction from a rear end edge of the windshield to the rearmost end of the outboard motor. | 12-25-2014 |
| 20090233501 | EXHAUST SYSTEM FOR SMALL WATERCRAFT - An exhaust system for a small watercraft for effectively reducing exhaust noise and allowing a high output of an engine to be easily obtained at the time of high speed operation. An exhaust outlet of an exhaust pipe extending from an engine provided in a watercraft body is disposed at a position that allows it to sink in the water at the time when a travel speed of the watercraft body is a predetermined speed or less. The exhaust outlet is raised above the water at the time when the travel speed of the watercraft body exceeds the predetermined speed. An open surface of the exhaust outlet is offset toward a side wall surface of a pump chamber from a center of a jet pump in the pump chamber and is made oblique toward the side wall surface toward which the open surface of the exhaust outlet is offset. | 09-17-2009 |
| 20120252288 | METHOD AND SYSTEM FOR CONTROLLING THE EXHAUST GASES FROM AN ENGINE - A method for controlling the exit of exhaust gases from an engine which is used to power an underwater propeller drive arranged at the hull bottom of a boat is provided. According to the method exhaust gases are allowed to flow from the engine through an exhaust channel and exit through a first underwater exhaust outlet in the underwater propeller drive. According to the method, if the engine is running and the transmission of the propeller drive is in neutral position, a second underwater exhaust outlet is opened for letting exhaust gases in the exhaust channel exit in a position closer to the hull bottom of the boat than the first underwater exhaust outlet. | 10-04-2012 |
| 20100261393 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage, an idle exhaust passage, a contraction portion and an expansion chamber, a bypass passage, and a check valve. The bypass passage includes an upstream end connected to the idle exhaust passage at a downstream side relative to the contraction portion and the expansion chamber, and a downstream end connected to the idle exhaust passage at an upstream side relative to the contraction portion and the expansion chamber. The check valve is provided in the bypass passage. The check valve is arranged such that air flows only from the upstream end side to the downstream end side. | 10-14-2010 |
| 20140024271 | MOTIVE FORCE OR POWER TAKEOFF DEVICE FOR VESSELS ACTUATED BY THE WATER FLOW GENERATED IN A COLLECTOR OR CONDUCTOR INCORPORATED INTO THE HULL - The device provides a motive force by a water collector or conductor ( | 01-23-2014 |
| 20090269999 | Marine Engine Exhaust Silencing System - A silencing system for a marine exhaust system incorporates a single muffler for each engine of the marine vessel. The muffler is provided with two sound dampening chambers interconnected by several exhaust openings between the chambers. A Y-shaped exhaust type system directs exhaust streams from both sides of an engine toward a single exhaust conduit which extends through a transom of the marine vessel. The muffler is provided with a drain opening that allows water to flow out of the first chamber of the muffler in order to maximize the available volume within that chamber for use in sound attenuation. The outlet of the second chamber is provided with a baffle plate that directs the flow of exhaust gas in a forward direction toward the transom of the marine vessel and a deflection surface that directs the exhaust gas to flow in a downward direction toward the surface of the body of water in which the marine vessel is operated. | 10-29-2009 |
| 20140057508 | MARINE PROPULSION SYSTEMS HAVING EXHAUST GAS RELIEF OUTLET - A marine propulsion system is for propelling a marine vessel in water. The system comprises an outboard motor that is coupled to a marine vessel, and that comprises an exhaust gas relief outlet that is located above the water when the outboard motor is at idle speed. A conduit conveys exhaust gas from the exhaust gas relief outlet to a discharge outlet located on the marine vessel. | 02-27-2014 |
| 20130149921 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. A stopper is provided at a rear end portion of a gear case of the lower unit, and a bush is inserted into and attached to an inner surface of the stopper. An inside diameter of the bush is set to substantially the same diameter as an outside diameter of a front end portion of the propeller boss, and the bush and the propeller boss are disposed by being overlapped with each other in an axial direction. | 06-13-2013 |
| 20130178121 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. An outside diameter of a front end portion of the propeller boss is set to be equal to or larger than an outside diameter of a rear end portion of a gear case in the lower unit. | 07-11-2013 |
| 20100003873 | OUTBOARD MOTOR - An outboard motor includes an engine and an exhaust pipe. The engine has a crank case, a cylinder body, and a cylinder head aligned along the front-rear direction of the outboard motor, and arranged to support a crankshaft so as to extend along an up-down direction. The exhaust pipe is arranged to lead an exhaust gas of the engine to a main exhaust passage positioned below the engine. The cylinder head has an exhaust gas outlet opened in the side portion on one side of the cylinder head in the left-right direction of the outboard motor. The exhaust pipe has a bypass exhaust pipe which, in a plan view, extends from the exhaust gas outlet, bypasses the engine along the crank case, and reaches the other side in the left-right direction of the engine. | 01-07-2010 |
| 20100022148 | EXHAUST DEVICE FOR OUTBOARD MOTOR MULTI-CYLINDER ENGINE - An exhaust device for an outboard motor multi-cylinder engine includes an exhaust passage having a first end connected to the multi-cylinder engine, a catalyst provided in the exhaust passage, and an exhaust chamber connected to a second end of the exhaust passage as well as to a main exhaust passage positioned below the engine. The exhaust passage includes upstream portions for cylinders which have inlet ends respectively connected to exhaust gas outlets of a plurality of cylinders whose exhaust valve opening periods are different, a collecting portion arranged to connect the outlet ends of these upstream portions to each other, and a plurality of downstream portions which are branched from the collecting portion and connected commonly to the exhaust chamber. The catalyst is provided in each of the plurality of downstream portions. | 01-28-2010 |
| 20100056001 | EXHAUST DEVICE FOR OUTBOARD MOTOR ENGINE AND OUTBOARD MOTOR - An exhaust device for an outboard motor engine includes an exhaust passage, a catalyst an air inlet, and an air pump. The exhaust passage is connected to the engine arranged to support a crankshaft extending along an up-down direction. The catalyst is arranged in the exhaust passage. The air inlet is arranged at a position higher than the engine inside an engine cover covering the engine. The air pump is supported by the engine. Further, the air pump is arranged to supply air taken through the air inlet to an upstream side of the catalyst in the exhaust passage. | 03-04-2010 |
| 20100056002 | OUTBOARD MOTOR - An outboard motor includes an engine, a first exhaust passage, a partition, a communication portion, an exhaust gas concentration sensor, and a catalyst. The engine is arranged to support a crankshaft extending along an up-down direction. The first exhaust passage is connected to the engine and is arranged to exhaust exhaust gas of the engine into water. The partition is arranged to partition an inside of the first exhaust passage into an upstream side and a downstream side. The communication portion is arranged to make the upstream side communicate with the downstream side of the partition in the first exhaust passage. The exhaust gas concentration sensor is arranged on the upstream side of the partition in the first exhaust passage. The catalyst is arranged on an upstream side of the exhaust gas concentration sensor in the first exhaust passage. | 03-04-2010 |
| 20100087108 | Concentricity spacer for a catalyst device of a marine engine - The exhaust system for a marine engine provides a concentricity spacer located between an outer surface of a generally tubular member of a catalyst device and an inner surface of a generally tubular cavity formed within a catalyst housing structure. The concentricity spacer is shaped to allow fluid to pass through the spacer in a direction generally parallel to a central axis of the tubular member. | 04-08-2010 |
| 20100087109 | Marine engine with thermally insulated catalyst structures - A catalyst system for a marine engine supports a catalyst device within a catalyst housing structure in such a way that a space is defined around the device in order to thermally insulate the device from the catalyst housing structure. A rim of the catalyst device cooperates with the housing structure to provide a seal at a bottom portion of the catalyst device to trap water within a reservoir to prevent the water from flowing toward exhaust ports of the engine. The space between the catalyst device and the housing structure provides a thermal insulation which allows the catalyst device to operate at an elevated temperature. | 04-08-2010 |
| 20100112878 | Catalyst device for a marine engine which is generally tubular with a rim portion - A catalyst system for a marine engine incorporates a catalyst device within a housing structure. The catalyst device has a rim portion that is disposed within first and second flange surfaces of first and second housing structures. A gasket is provided which is configured to have an opening that allows the rim portion of the catalyst device to be constrained between the first and second flange portions but not between the gasket and either of the first and second flange surfaces. | 05-06-2010 |
| 20100130079 | Marine engine exhaust system having a plurality of catalyst devices disposed in parallel with each other - A catalyst system for a marine engine includes a plurality of catalyst devices arranged in parallel with each other to accommodate a smaller overall size in a preferred dimension to allow more efficient packaging of the catalyst system. | 05-27-2010 |
| 20100240270 | OUTBOARD MOTOR - An outboard motor includes an engine and a catalyst. The engine includes a cylinder and a cylinder head. The engine includes an exhaust port, a catalyst housing portion, a first exhaust passage, and a passage defining member. The exhaust port is provided in the cylinder head. The catalyst housing portion is provided at a side portion of the cylinder head. The first exhaust passage is arranged to guide exhaust discharged from the exhaust port into an interior of the catalyst housing portion. The passage defining member defines a second exhaust passage. The second exhaust passage is arranged such that exhaust that has passed through the interior of the catalyst housing portion flows into the second exhaust passage. The catalyst is held by the engine in a state in which at least a portion of the catalyst is housed in the interior of the catalyst housing portion. | 09-23-2010 |
| 20110039461 | Exhaust plenum for distributing exhaust gas uniformly through a catalyst module - A plenum is provided upstream from a catalyst module and downstream from a plurality of exhaust ports of a marine engine. The plenum is provided with a cross-sectional area that induces exhaust gas to slow as it passes from the plurality of exhaust ports into the plenum. This slowing of the velocity of exhaust gas improves the probability that the exhaust gas will be more evenly distributed across the inlet surface of the catalyst module. | 02-17-2011 |
| 20110070785 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20110070786 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20130029545 | OUTBOARD MOTOR AND METHOD FOR MANUFACTURING OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust manifold, and a lower exhaust passage. The engine includes a plurality of cylinders, and a plurality of exhaust ports. The cylinders are disposed in-line in a vertical direction. The exhaust ports are respectively connected to the cylinders. The exhaust manifold includes a first passage, a second passage, and a third passage. The first passage is connected to the exhaust ports, and extends in a vertical direction. The second passage is connected to the first passage. The third passage is connected to the first passage below the second passage. The lower exhaust passage is connected to the exhaust manifold, and provides a passage through which exhaust gas is expelled to the outside from the exhaust manifold. One of the second passage and the third passage is connected to the lower exhaust passage. | 01-31-2013 |
| 20140287636 | OUTBOARD MOTOR - An outboard motor includes an exhaust pipe that includes an outer wall section, an inner wall section, a coolant passage, and a constricted section. The inner wall section is arranged inward of the outer wall section. The coolant passage is arranged between the outer wall section and the inner wall section. The constricted section is configured to constrict a flow cross section of the coolant passage. A catalytic converter is housed in the exhaust pipe. A temperature sensor is installed in the constricted section and measures a temperature of a pipe wall of the exhaust pipe. | 09-25-2014 |
| 20140322997 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 10-30-2014 |
| 20100240269 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust guide, and a catalyst. The engine includes a cylinder and crankshaft. The crankshaft is disposed along a vertical direction. The exhaust guide is arranged to support the engine from below. The catalyst is disposed in an interior of the engine. The engine includes a cylinder body. The cylinder body includes a housing portion arranged to house—the catalyst. The cylinder body includes a first exhaust passage that includes an interior of the housing portion. The catalyst is inserted into the housing portion from below and is sandwiched from above and below by the housing portion and the exhaust guide. | 09-23-2010 |
| 20100261392 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull having a sealed engine room, an engine installed in the engine room, a jet propulsion unit arranged to be driven by the engine so as to suck in water from around the hull and jet the water, a saddle type seat disposed above the engine room, a first exhaust pipe, an exhaust pipe cooling unit, and a catalyst unit. The first exhaust pipe is attached to a side of the engine inside the engine room, extends rearward from the side of the engine, and is arranged to guide exhaust gas discharged from the engine. The exhaust pipe cooling unit is arranged to cool the first exhaust pipe. The catalyst unit is connected to the first exhaust pipe, is disposed inside the engine room so as to oppose a rear surface of the engine, and is arranged to promote reaction of components contained in the exhaust gas. | 10-14-2010 |
| 20110223819 | OUTBOARD MOTOR - An outboard motor includes an engine, a housing, a catalyst, and an engine cover. The housing includes a partitioning wall that is arranged to partition an interior of the housing into a first exhaust space connected to exhaust ports of the engine, and a second exhaust space connected to the first exhaust space. The housing is arranged such that the second exhaust space is positioned at the same side as the first exhaust space with respect to a plane that includes central axes of the plurality of the cylinders. The catalyst is positioned at a height such that at least a portion of the catalyst overlaps with the first exhaust space when viewed from a horizontal direction. The catalyst is disposed in the second exhaust space so as to guide the exhaust guided from the first exhaust space to the second exhaust space. | 09-15-2011 |
| 20160129982 | BOAT DRIVE - A boat drive including combustion engine located within the hull and a drive unit located outside the hull. The drive has a propeller shaft and an exhaust system with an exhaust duct and an outlet. The exhaust duct connects the engine to the exhaust outlet for carrying away exhaust gases from the engine and cooling water introduced into the exhaust duct. The exhaust outlet is arranged in the propeller shaft. A first exhaust release opening is arranged in the exhaust duct, between the engine and the exhaust outlet, so that during operation, a first fraction of the exhaust gases and cooling water is discharged through the first exhaust release opening, while a second fraction of the exhaust gases and the cooling water is discharged through the exhaust outlet. A device is provided for adjusting the first fraction that can be discharged through the first exhaust release opening. | 05-12-2016 |
| 20100285707 | OUTBOARD ENGINE UNIT - Exhaust passage system in an outboard engine unit includes: an engine-side exhaust pipe; a downstream exhaust pipe for directing exhaust gas downstream from the engine-side exhaust pipe, a lower end portion of the engine-side exhaust pipe and an upper end portion of the downstream exhaust pipe being positioned in horizontally parallel to each other and horizontally overlap each other so as to provide fluid communication therebetween via a through-hole formed in the overlapping portions of the end portions; and a vertical partition wall provided, in an upper end region of the overlapping portions for hampering back-flows of fluid. | 11-11-2010 |
| 20090047849 | Marine engine exhaust system with cooling arrangement - A marine engine exhaust system is provided. The system includes a first and second manifold. A first conduit is in fluid communication with the first manifold so that a first gas is transferred into a first gas passageway of the first conduit. The first conduit has a first cooling fluid passageway. A second conduit is in fluid communication with the second manifold so that a second gas exiting the second manifold is transferred into a second gas passageway of the second conduit. The second conduit has a second cooling fluid passageway. Cooling fluid is transferred through the first cooling fluid passageway so as to have a direction of flow through the first conduit opposite to the direction of flow of the first gas through the first gas passageway of the first conduit. | 02-19-2009 |
| 20110306254 | WATER JACKETED MARINE EXHAUST COMPONENTS HAVING MULTIPLE STREAM SPRAY RING CONFIGURATIONS - A water jacketed exhaust component includes an exhaust pipe having a radially inwardly tapered tail end, a water jacket disposed in surrounding relation with the exhaust pipe, and a generally V-shaped spray ring. The spray ring includes a first and second set of apertures that create diverging streams of cooling water. A first set of apertures creates an annularly disposed series of streams that are directed downstream and radially inward. These streams are generally directed toward the outer surface of the exhaust pipe structure which extends downstream of the spray ring. A second set of apertures creates an annularly disposed series of streams that are directed downstream and radially outward. These streams are generally directed toward the inner surface of the water jacket structure extending downstream of the spray ring. By providing a water jacketed exhaust component with a spray ring that creates diverging streams of cooling water, the present invention provides a water jacketed marine exhaust component that provides improved exhaust gas cooling over a wider range of engine operating conditions. An alternate embodiment includes a V-shaped spray ring configured to create converging streams of cooling water. | 12-15-2011 |
| 20130203308 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a first exhaust passage including an upward guiding portion that guides exhaust generated by an engine upward, a second exhaust passage disposed at a downstream side relative to the first exhaust passage, and a communication passage communicating the first exhaust passage and the second exhaust passage with each other. The communication passage includes a first upstream end opening at the first exhaust passage and a second downstream end disposed below the first upstream end and opening at the second exhaust passage. Further, the communication passage includes an expanded portion disposed at a height in between the first upstream end and the second downstream end and being more expanded than the first upstream end and the second downstream end. | 08-08-2013 |
| 20130203309 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes an exhaust passage guiding exhaust generated at an engine, a water jacket cooling at least a portion of the exhaust passage, a cooling device supplying water outside the vessel propulsion apparatus to the water jacket, an exhaust sensor detecting a concentration of a component in the exhaust in the exhaust passage, and a non-catalytic porous member disposed in the exhaust passage at an upstream side relative to the exhaust sensor. The non-catalytic porous member is a porous member that does not hold a catalyst. | 08-08-2013 |
| 440089000 | Through hub outlet | 2 |
| 20080242164 | Marine engine exhaust system - A marine engine exhaust system is provided. One exemplary embodiment of the system includes first and second manifolds. A first gas is transferred through a first conduit from the first manifold and is isolated from cooling water through at least a portion of the first conduit. A second conduit is in fluid communication with the second manifold and allows a second gas to be transferred through that is isolated from cooling water through a portion of its length. The first and second conduits are in fluid communication with a third conduit in which the first and second gases merge. Cooling water is merged with either the first or second gas, or both, in the first and second conduits before the first gas and second gas merge in the third conduit. | 10-02-2008 |
| 20090156071 | ENGINE EXHAUST BYPASS SYSTEM FOR OCEAN VESSEL - A primary exhaust bypass for a water-borne vessel having a seat member and a closure member coupled to the seat member, wherein the seat and closure members are configured to seal against exhaust leakage in the closed position and to allow exhaust leakage in the opened condition, and a locking mechanism, wherein the bypass is configured to open when the vessel lists a predetermined amount. A method of bypassing a blocked primary exhaust system may include establishing a bypass exhaust route, providing a normally-closed bypass mechanism at a distal portion of the bypass exhaust route, and changing the orientation of the bypass mechanism with respect to gravity, which may allow the bypass mechanism to open. | 06-18-2009 |
| 20090197489 | EXHAUST INTAKE BONNET (EIB) FOR MARITIME EMISSIONS CONTROL SYSTEM - An improved Exhaust Intake Bonnet (EIB) for an Advanced Maritime Emissions Control System (AMECS) includes a shroud carried by a rigid upper frame and a lowerable and raisable rigid lower frame. The upper frame includes a peak with a duct for receiving exhaust gasses captured by the shroud and winches for lowering and raising the lower frame. The shroud is expandable when the lower frame is lowered and collapsible when the lower frame is raised and has a cinchable base. The AMECS is joined to a ship by positioning the EIB over a ship's exhaust stack using a deployment arm. The shroud is then lowered over the stack and then cinched around the stack to provide a soft attachment between the EIB and the ship's stack. Later, the steps are reversed to separate the AMECS from the ship. | 08-06-2009 |
| 20090233502 | Friction reducing pollution control system for marine vehicles - An exhaust redirect line in communication with an engine exhaust channel of a marine vehicle receiving exhaust gas. A blower unit in the exhaust redirect line directing the exhaust gas through the exhaust redirect line. A mixing chamber in communication with the exhaust redirect line receiving the engine exhaust gas. An injector unit in communication with the mixing chamber introducing a chemical agent, air and water into the mixing chamber to provide a treated exhaust gas. An output vane disposed on an exterior underside of a hull being in communication with the mixing chamber discharging the treated exhaust gas underneath the hull as a foam, whereby the engine exhaust gas is encapsulated and detoxified by the chemical agent in the foam to prevent the exhaust gas from entering the surrounding water and wherein the foam reduces friction between the hull and the surrounding water to improve engine efficiency. | 09-17-2009 |
| 20090270000 | Exhaust system of a marine vessel - An exhaust system for a marine propulsion device is configured to dispose two exhaust conduits in generally concentric overlapping relation with each other in order to minimize the potential cross sectional area of a leak path in the event that a seal fails. One of the exhaust conduits extends through a transom or other surface of a marine vessel and another exhaust conduit conducts exhaust gas from an engine to the exhaust conduit extending through the surface of the marine vessel. | 10-29-2009 |
| 20100041287 | GASKETED CONNECTION OF MARINE ENGINE EXHAUST OUTLET TO EXHAUST CONDUIT - A connecting flange comprises a generally open ended cylindrical body having an inlet adapted for receiving a gasket for providing a sealing connection with a turbocharger housing, and an outlet for connection to marine exhaust conduit. The connector inlet terminates in an end having a radially flared angularly disposed end wall adapted for mating abutting engagement with a correspondingly angled turbocharger housing end wall. The connector inlet end further includes circumferential axially recessed groove that receives spiral wound gasket in a configuration wherein the gasket forms redundant seals at a plurality of locations. The connector inlet structure cooperates with the turbo charger outlet structure to completely enclose the gasket thereby protecting the gasket from hot corrosive exhaust gases. A V-Band clamp is disposed in covering relation with the connector end wall and abutting turbocharger housing component to secure the connector to the turbocharger. | 02-18-2010 |
| 20100041288 | SUBMERGED EXHAUST DISCHARGE FOR MARINE VESSEL - A marine exhaust system adapted for discharging marine exhaust below the water line through at least one streamlined conformal discharge fitting attached to the vessel hull. Each discharge fitting comprises a low profile body attached to the vessel hull in relation with an exhaust discharge conduit terminating in a thru-hull opening so as to discharge marine exhaust into the discharge fitting body. The discharge fitting preferably includes a forward end and an aft end connecting a main discharge fitting body disposed in spaced relation with the underside of the vessel hull. The discharge fitting body defines an exhaust outlet disposed on outboard side thereof so as to allow exhaust gas to exit in an outward and aft flow such that corrosive exhaust gas does not flow over the vessel propellers. Forward and aft baffles are disposed within the discharge fitting body to direct and re-direct exhaust gas flow. By maintaining a streamlined and low-profile/conformal shape, reduction in overall hull hydrodynamics due to increased drag is minimized. | 02-18-2010 |
| 20100285708 | OUTBOARD ENGINE UNIT - Outboard engine unit includes: an anti-splash plate and an anti-cavitation plate provided on a gear case at a vertical interval from each other and extending horizontally from the gear case; an exhaust port provided in a side surface of the gear case for discharging exhaust gas from an engine; and a protruding section provided on the side surface of the gear case at a position located rearwardly of the exhaust port, the protruding section protruding laterally outwardly from the side surface for changing a direction of water flows flowing along the side surface. | 11-11-2010 |
| 20120083176 | Anti-Ingestion System for a Marine Drive - An anti-ingestion system is provided for a marine drive with a submerged exhaust outlet. An anti-ingestion valve is operated by differential pressure thereacross to a closed condition when the engine is operating in an on state and cooling water is being pumped through a water conduit to an exhaust mixing point, with the anti-ingestion valve blocking passage of cooling water therepast in the noted closed condition. The anti-ingestion valve is operated by differential pressure thereacross to an open condition when the engine is in an off state, and permits passage of air therethrough and communicates atmospheric pressure through the water conduit to the exhaust mixing point to relieve vacuum in the exhaust system. | 04-05-2012 |
| 20130130576 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders, an exhaust manifold, and an exhaust pipe. The exhaust manifold includes a first passage and a second passage. The first passage includes a plurality of first inflow ports into which exhaust gases flow from the plurality of cylinders, a first collecting portion that collects exhaust gases that have flowed into the plurality of first inflow ports, and a first exhaust port through which exhaust gases collected by the first collecting portion are discharged. The second passage includes a second inflow port into which exhaust gases flow and a second exhaust port through which exhaust gases that have flowed into the second inflow port are discharged. The exhaust pipe includes a connection passage through which the first exhaust port and the second inflow port are connected together. | 05-23-2013 |
| 20130130577 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 05-23-2013 |
| 20140106633 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage member, and an idle exhaust passage member. The exhaust passage member defines a main exhaust passage through which exhaust gases of the engine are guided to a main exhaust port disposed in the water, and also defines a portion of an idle exhaust passage through which exhaust gases in the main exhaust passage are guided to an idle exhaust port opened to the atmosphere. The idle exhaust passage member includes an upstream end connected to the exhaust passage member and a downstream end that defines the idle exhaust port and is disposed at a higher position than the upstream end. The idle exhaust passage member is made of a flexible material, and is integrally formed from the upstream end to the downstream end. | 04-17-2014 |
| 20140378014 | VESSEL - A vessel includes an outboard motor including an upstream exhaust port that emits exhaust, a hull including a rear portion on which the outboard motor is mounted, a cabin disposed above the hull, a downstream exhaust port disposed farther to a lateral side than the outboard motor, and an exhaust passage extending from the upstream exhaust port to the downstream exhaust port and guiding the exhaust from the upstream exhaust port to the downstream exhaust port. The cabin includes a windshield disposed in front of the outboard motor in a plan view. The height of the cabin from a rearmost end of the outboard motor is not less than ½ or about ½ of a horizontal distance in a front/rear direction from a rear end edge of the windshield to the rearmost end of the outboard motor. | 12-25-2014 |
| 20090233501 | EXHAUST SYSTEM FOR SMALL WATERCRAFT - An exhaust system for a small watercraft for effectively reducing exhaust noise and allowing a high output of an engine to be easily obtained at the time of high speed operation. An exhaust outlet of an exhaust pipe extending from an engine provided in a watercraft body is disposed at a position that allows it to sink in the water at the time when a travel speed of the watercraft body is a predetermined speed or less. The exhaust outlet is raised above the water at the time when the travel speed of the watercraft body exceeds the predetermined speed. An open surface of the exhaust outlet is offset toward a side wall surface of a pump chamber from a center of a jet pump in the pump chamber and is made oblique toward the side wall surface toward which the open surface of the exhaust outlet is offset. | 09-17-2009 |
| 20120252288 | METHOD AND SYSTEM FOR CONTROLLING THE EXHAUST GASES FROM AN ENGINE - A method for controlling the exit of exhaust gases from an engine which is used to power an underwater propeller drive arranged at the hull bottom of a boat is provided. According to the method exhaust gases are allowed to flow from the engine through an exhaust channel and exit through a first underwater exhaust outlet in the underwater propeller drive. According to the method, if the engine is running and the transmission of the propeller drive is in neutral position, a second underwater exhaust outlet is opened for letting exhaust gases in the exhaust channel exit in a position closer to the hull bottom of the boat than the first underwater exhaust outlet. | 10-04-2012 |
| 20100261393 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage, an idle exhaust passage, a contraction portion and an expansion chamber, a bypass passage, and a check valve. The bypass passage includes an upstream end connected to the idle exhaust passage at a downstream side relative to the contraction portion and the expansion chamber, and a downstream end connected to the idle exhaust passage at an upstream side relative to the contraction portion and the expansion chamber. The check valve is provided in the bypass passage. The check valve is arranged such that air flows only from the upstream end side to the downstream end side. | 10-14-2010 |
| 20140024271 | MOTIVE FORCE OR POWER TAKEOFF DEVICE FOR VESSELS ACTUATED BY THE WATER FLOW GENERATED IN A COLLECTOR OR CONDUCTOR INCORPORATED INTO THE HULL - The device provides a motive force by a water collector or conductor ( | 01-23-2014 |
| 20090269999 | Marine Engine Exhaust Silencing System - A silencing system for a marine exhaust system incorporates a single muffler for each engine of the marine vessel. The muffler is provided with two sound dampening chambers interconnected by several exhaust openings between the chambers. A Y-shaped exhaust type system directs exhaust streams from both sides of an engine toward a single exhaust conduit which extends through a transom of the marine vessel. The muffler is provided with a drain opening that allows water to flow out of the first chamber of the muffler in order to maximize the available volume within that chamber for use in sound attenuation. The outlet of the second chamber is provided with a baffle plate that directs the flow of exhaust gas in a forward direction toward the transom of the marine vessel and a deflection surface that directs the exhaust gas to flow in a downward direction toward the surface of the body of water in which the marine vessel is operated. | 10-29-2009 |
| 20140057508 | MARINE PROPULSION SYSTEMS HAVING EXHAUST GAS RELIEF OUTLET - A marine propulsion system is for propelling a marine vessel in water. The system comprises an outboard motor that is coupled to a marine vessel, and that comprises an exhaust gas relief outlet that is located above the water when the outboard motor is at idle speed. A conduit conveys exhaust gas from the exhaust gas relief outlet to a discharge outlet located on the marine vessel. | 02-27-2014 |
| 20130149921 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. A stopper is provided at a rear end portion of a gear case of the lower unit, and a bush is inserted into and attached to an inner surface of the stopper. An inside diameter of the bush is set to substantially the same diameter as an outside diameter of a front end portion of the propeller boss, and the bush and the propeller boss are disposed by being overlapped with each other in an axial direction. | 06-13-2013 |
| 20130178121 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. An outside diameter of a front end portion of the propeller boss is set to be equal to or larger than an outside diameter of a rear end portion of a gear case in the lower unit. | 07-11-2013 |
| 20100003873 | OUTBOARD MOTOR - An outboard motor includes an engine and an exhaust pipe. The engine has a crank case, a cylinder body, and a cylinder head aligned along the front-rear direction of the outboard motor, and arranged to support a crankshaft so as to extend along an up-down direction. The exhaust pipe is arranged to lead an exhaust gas of the engine to a main exhaust passage positioned below the engine. The cylinder head has an exhaust gas outlet opened in the side portion on one side of the cylinder head in the left-right direction of the outboard motor. The exhaust pipe has a bypass exhaust pipe which, in a plan view, extends from the exhaust gas outlet, bypasses the engine along the crank case, and reaches the other side in the left-right direction of the engine. | 01-07-2010 |
| 20100022148 | EXHAUST DEVICE FOR OUTBOARD MOTOR MULTI-CYLINDER ENGINE - An exhaust device for an outboard motor multi-cylinder engine includes an exhaust passage having a first end connected to the multi-cylinder engine, a catalyst provided in the exhaust passage, and an exhaust chamber connected to a second end of the exhaust passage as well as to a main exhaust passage positioned below the engine. The exhaust passage includes upstream portions for cylinders which have inlet ends respectively connected to exhaust gas outlets of a plurality of cylinders whose exhaust valve opening periods are different, a collecting portion arranged to connect the outlet ends of these upstream portions to each other, and a plurality of downstream portions which are branched from the collecting portion and connected commonly to the exhaust chamber. The catalyst is provided in each of the plurality of downstream portions. | 01-28-2010 |
| 20100056001 | EXHAUST DEVICE FOR OUTBOARD MOTOR ENGINE AND OUTBOARD MOTOR - An exhaust device for an outboard motor engine includes an exhaust passage, a catalyst an air inlet, and an air pump. The exhaust passage is connected to the engine arranged to support a crankshaft extending along an up-down direction. The catalyst is arranged in the exhaust passage. The air inlet is arranged at a position higher than the engine inside an engine cover covering the engine. The air pump is supported by the engine. Further, the air pump is arranged to supply air taken through the air inlet to an upstream side of the catalyst in the exhaust passage. | 03-04-2010 |
| 20100056002 | OUTBOARD MOTOR - An outboard motor includes an engine, a first exhaust passage, a partition, a communication portion, an exhaust gas concentration sensor, and a catalyst. The engine is arranged to support a crankshaft extending along an up-down direction. The first exhaust passage is connected to the engine and is arranged to exhaust exhaust gas of the engine into water. The partition is arranged to partition an inside of the first exhaust passage into an upstream side and a downstream side. The communication portion is arranged to make the upstream side communicate with the downstream side of the partition in the first exhaust passage. The exhaust gas concentration sensor is arranged on the upstream side of the partition in the first exhaust passage. The catalyst is arranged on an upstream side of the exhaust gas concentration sensor in the first exhaust passage. | 03-04-2010 |
| 20100087108 | Concentricity spacer for a catalyst device of a marine engine - The exhaust system for a marine engine provides a concentricity spacer located between an outer surface of a generally tubular member of a catalyst device and an inner surface of a generally tubular cavity formed within a catalyst housing structure. The concentricity spacer is shaped to allow fluid to pass through the spacer in a direction generally parallel to a central axis of the tubular member. | 04-08-2010 |
| 20100087109 | Marine engine with thermally insulated catalyst structures - A catalyst system for a marine engine supports a catalyst device within a catalyst housing structure in such a way that a space is defined around the device in order to thermally insulate the device from the catalyst housing structure. A rim of the catalyst device cooperates with the housing structure to provide a seal at a bottom portion of the catalyst device to trap water within a reservoir to prevent the water from flowing toward exhaust ports of the engine. The space between the catalyst device and the housing structure provides a thermal insulation which allows the catalyst device to operate at an elevated temperature. | 04-08-2010 |
| 20100112878 | Catalyst device for a marine engine which is generally tubular with a rim portion - A catalyst system for a marine engine incorporates a catalyst device within a housing structure. The catalyst device has a rim portion that is disposed within first and second flange surfaces of first and second housing structures. A gasket is provided which is configured to have an opening that allows the rim portion of the catalyst device to be constrained between the first and second flange portions but not between the gasket and either of the first and second flange surfaces. | 05-06-2010 |
| 20100130079 | Marine engine exhaust system having a plurality of catalyst devices disposed in parallel with each other - A catalyst system for a marine engine includes a plurality of catalyst devices arranged in parallel with each other to accommodate a smaller overall size in a preferred dimension to allow more efficient packaging of the catalyst system. | 05-27-2010 |
| 20100240270 | OUTBOARD MOTOR - An outboard motor includes an engine and a catalyst. The engine includes a cylinder and a cylinder head. The engine includes an exhaust port, a catalyst housing portion, a first exhaust passage, and a passage defining member. The exhaust port is provided in the cylinder head. The catalyst housing portion is provided at a side portion of the cylinder head. The first exhaust passage is arranged to guide exhaust discharged from the exhaust port into an interior of the catalyst housing portion. The passage defining member defines a second exhaust passage. The second exhaust passage is arranged such that exhaust that has passed through the interior of the catalyst housing portion flows into the second exhaust passage. The catalyst is held by the engine in a state in which at least a portion of the catalyst is housed in the interior of the catalyst housing portion. | 09-23-2010 |
| 20110039461 | Exhaust plenum for distributing exhaust gas uniformly through a catalyst module - A plenum is provided upstream from a catalyst module and downstream from a plurality of exhaust ports of a marine engine. The plenum is provided with a cross-sectional area that induces exhaust gas to slow as it passes from the plurality of exhaust ports into the plenum. This slowing of the velocity of exhaust gas improves the probability that the exhaust gas will be more evenly distributed across the inlet surface of the catalyst module. | 02-17-2011 |
| 20110070785 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20110070786 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20130029545 | OUTBOARD MOTOR AND METHOD FOR MANUFACTURING OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust manifold, and a lower exhaust passage. The engine includes a plurality of cylinders, and a plurality of exhaust ports. The cylinders are disposed in-line in a vertical direction. The exhaust ports are respectively connected to the cylinders. The exhaust manifold includes a first passage, a second passage, and a third passage. The first passage is connected to the exhaust ports, and extends in a vertical direction. The second passage is connected to the first passage. The third passage is connected to the first passage below the second passage. The lower exhaust passage is connected to the exhaust manifold, and provides a passage through which exhaust gas is expelled to the outside from the exhaust manifold. One of the second passage and the third passage is connected to the lower exhaust passage. | 01-31-2013 |
| 20140287636 | OUTBOARD MOTOR - An outboard motor includes an exhaust pipe that includes an outer wall section, an inner wall section, a coolant passage, and a constricted section. The inner wall section is arranged inward of the outer wall section. The coolant passage is arranged between the outer wall section and the inner wall section. The constricted section is configured to constrict a flow cross section of the coolant passage. A catalytic converter is housed in the exhaust pipe. A temperature sensor is installed in the constricted section and measures a temperature of a pipe wall of the exhaust pipe. | 09-25-2014 |
| 20140322997 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 10-30-2014 |
| 20100240269 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust guide, and a catalyst. The engine includes a cylinder and crankshaft. The crankshaft is disposed along a vertical direction. The exhaust guide is arranged to support the engine from below. The catalyst is disposed in an interior of the engine. The engine includes a cylinder body. The cylinder body includes a housing portion arranged to house—the catalyst. The cylinder body includes a first exhaust passage that includes an interior of the housing portion. The catalyst is inserted into the housing portion from below and is sandwiched from above and below by the housing portion and the exhaust guide. | 09-23-2010 |
| 20100261392 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull having a sealed engine room, an engine installed in the engine room, a jet propulsion unit arranged to be driven by the engine so as to suck in water from around the hull and jet the water, a saddle type seat disposed above the engine room, a first exhaust pipe, an exhaust pipe cooling unit, and a catalyst unit. The first exhaust pipe is attached to a side of the engine inside the engine room, extends rearward from the side of the engine, and is arranged to guide exhaust gas discharged from the engine. The exhaust pipe cooling unit is arranged to cool the first exhaust pipe. The catalyst unit is connected to the first exhaust pipe, is disposed inside the engine room so as to oppose a rear surface of the engine, and is arranged to promote reaction of components contained in the exhaust gas. | 10-14-2010 |
| 20110223819 | OUTBOARD MOTOR - An outboard motor includes an engine, a housing, a catalyst, and an engine cover. The housing includes a partitioning wall that is arranged to partition an interior of the housing into a first exhaust space connected to exhaust ports of the engine, and a second exhaust space connected to the first exhaust space. The housing is arranged such that the second exhaust space is positioned at the same side as the first exhaust space with respect to a plane that includes central axes of the plurality of the cylinders. The catalyst is positioned at a height such that at least a portion of the catalyst overlaps with the first exhaust space when viewed from a horizontal direction. The catalyst is disposed in the second exhaust space so as to guide the exhaust guided from the first exhaust space to the second exhaust space. | 09-15-2011 |
| 20160129982 | BOAT DRIVE - A boat drive including combustion engine located within the hull and a drive unit located outside the hull. The drive has a propeller shaft and an exhaust system with an exhaust duct and an outlet. The exhaust duct connects the engine to the exhaust outlet for carrying away exhaust gases from the engine and cooling water introduced into the exhaust duct. The exhaust outlet is arranged in the propeller shaft. A first exhaust release opening is arranged in the exhaust duct, between the engine and the exhaust outlet, so that during operation, a first fraction of the exhaust gases and cooling water is discharged through the first exhaust release opening, while a second fraction of the exhaust gases and the cooling water is discharged through the exhaust outlet. A device is provided for adjusting the first fraction that can be discharged through the first exhaust release opening. | 05-12-2016 |
| 20100285707 | OUTBOARD ENGINE UNIT - Exhaust passage system in an outboard engine unit includes: an engine-side exhaust pipe; a downstream exhaust pipe for directing exhaust gas downstream from the engine-side exhaust pipe, a lower end portion of the engine-side exhaust pipe and an upper end portion of the downstream exhaust pipe being positioned in horizontally parallel to each other and horizontally overlap each other so as to provide fluid communication therebetween via a through-hole formed in the overlapping portions of the end portions; and a vertical partition wall provided, in an upper end region of the overlapping portions for hampering back-flows of fluid. | 11-11-2010 |
| 20090047849 | Marine engine exhaust system with cooling arrangement - A marine engine exhaust system is provided. The system includes a first and second manifold. A first conduit is in fluid communication with the first manifold so that a first gas is transferred into a first gas passageway of the first conduit. The first conduit has a first cooling fluid passageway. A second conduit is in fluid communication with the second manifold so that a second gas exiting the second manifold is transferred into a second gas passageway of the second conduit. The second conduit has a second cooling fluid passageway. Cooling fluid is transferred through the first cooling fluid passageway so as to have a direction of flow through the first conduit opposite to the direction of flow of the first gas through the first gas passageway of the first conduit. | 02-19-2009 |
| 20110306254 | WATER JACKETED MARINE EXHAUST COMPONENTS HAVING MULTIPLE STREAM SPRAY RING CONFIGURATIONS - A water jacketed exhaust component includes an exhaust pipe having a radially inwardly tapered tail end, a water jacket disposed in surrounding relation with the exhaust pipe, and a generally V-shaped spray ring. The spray ring includes a first and second set of apertures that create diverging streams of cooling water. A first set of apertures creates an annularly disposed series of streams that are directed downstream and radially inward. These streams are generally directed toward the outer surface of the exhaust pipe structure which extends downstream of the spray ring. A second set of apertures creates an annularly disposed series of streams that are directed downstream and radially outward. These streams are generally directed toward the inner surface of the water jacket structure extending downstream of the spray ring. By providing a water jacketed exhaust component with a spray ring that creates diverging streams of cooling water, the present invention provides a water jacketed marine exhaust component that provides improved exhaust gas cooling over a wider range of engine operating conditions. An alternate embodiment includes a V-shaped spray ring configured to create converging streams of cooling water. | 12-15-2011 |
| 20130203308 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a first exhaust passage including an upward guiding portion that guides exhaust generated by an engine upward, a second exhaust passage disposed at a downstream side relative to the first exhaust passage, and a communication passage communicating the first exhaust passage and the second exhaust passage with each other. The communication passage includes a first upstream end opening at the first exhaust passage and a second downstream end disposed below the first upstream end and opening at the second exhaust passage. Further, the communication passage includes an expanded portion disposed at a height in between the first upstream end and the second downstream end and being more expanded than the first upstream end and the second downstream end. | 08-08-2013 |
| 20130203309 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes an exhaust passage guiding exhaust generated at an engine, a water jacket cooling at least a portion of the exhaust passage, a cooling device supplying water outside the vessel propulsion apparatus to the water jacket, an exhaust sensor detecting a concentration of a component in the exhaust in the exhaust passage, and a non-catalytic porous member disposed in the exhaust passage at an upstream side relative to the exhaust sensor. The non-catalytic porous member is a porous member that does not hold a catalyst. | 08-08-2013 |
| 440089000 | Water cooling exhaust | 8 |
| 20080242164 | Marine engine exhaust system - A marine engine exhaust system is provided. One exemplary embodiment of the system includes first and second manifolds. A first gas is transferred through a first conduit from the first manifold and is isolated from cooling water through at least a portion of the first conduit. A second conduit is in fluid communication with the second manifold and allows a second gas to be transferred through that is isolated from cooling water through a portion of its length. The first and second conduits are in fluid communication with a third conduit in which the first and second gases merge. Cooling water is merged with either the first or second gas, or both, in the first and second conduits before the first gas and second gas merge in the third conduit. | 10-02-2008 |
| 20090156071 | ENGINE EXHAUST BYPASS SYSTEM FOR OCEAN VESSEL - A primary exhaust bypass for a water-borne vessel having a seat member and a closure member coupled to the seat member, wherein the seat and closure members are configured to seal against exhaust leakage in the closed position and to allow exhaust leakage in the opened condition, and a locking mechanism, wherein the bypass is configured to open when the vessel lists a predetermined amount. A method of bypassing a blocked primary exhaust system may include establishing a bypass exhaust route, providing a normally-closed bypass mechanism at a distal portion of the bypass exhaust route, and changing the orientation of the bypass mechanism with respect to gravity, which may allow the bypass mechanism to open. | 06-18-2009 |
| 20090197489 | EXHAUST INTAKE BONNET (EIB) FOR MARITIME EMISSIONS CONTROL SYSTEM - An improved Exhaust Intake Bonnet (EIB) for an Advanced Maritime Emissions Control System (AMECS) includes a shroud carried by a rigid upper frame and a lowerable and raisable rigid lower frame. The upper frame includes a peak with a duct for receiving exhaust gasses captured by the shroud and winches for lowering and raising the lower frame. The shroud is expandable when the lower frame is lowered and collapsible when the lower frame is raised and has a cinchable base. The AMECS is joined to a ship by positioning the EIB over a ship's exhaust stack using a deployment arm. The shroud is then lowered over the stack and then cinched around the stack to provide a soft attachment between the EIB and the ship's stack. Later, the steps are reversed to separate the AMECS from the ship. | 08-06-2009 |
| 20090233502 | Friction reducing pollution control system for marine vehicles - An exhaust redirect line in communication with an engine exhaust channel of a marine vehicle receiving exhaust gas. A blower unit in the exhaust redirect line directing the exhaust gas through the exhaust redirect line. A mixing chamber in communication with the exhaust redirect line receiving the engine exhaust gas. An injector unit in communication with the mixing chamber introducing a chemical agent, air and water into the mixing chamber to provide a treated exhaust gas. An output vane disposed on an exterior underside of a hull being in communication with the mixing chamber discharging the treated exhaust gas underneath the hull as a foam, whereby the engine exhaust gas is encapsulated and detoxified by the chemical agent in the foam to prevent the exhaust gas from entering the surrounding water and wherein the foam reduces friction between the hull and the surrounding water to improve engine efficiency. | 09-17-2009 |
| 20090270000 | Exhaust system of a marine vessel - An exhaust system for a marine propulsion device is configured to dispose two exhaust conduits in generally concentric overlapping relation with each other in order to minimize the potential cross sectional area of a leak path in the event that a seal fails. One of the exhaust conduits extends through a transom or other surface of a marine vessel and another exhaust conduit conducts exhaust gas from an engine to the exhaust conduit extending through the surface of the marine vessel. | 10-29-2009 |
| 20100041287 | GASKETED CONNECTION OF MARINE ENGINE EXHAUST OUTLET TO EXHAUST CONDUIT - A connecting flange comprises a generally open ended cylindrical body having an inlet adapted for receiving a gasket for providing a sealing connection with a turbocharger housing, and an outlet for connection to marine exhaust conduit. The connector inlet terminates in an end having a radially flared angularly disposed end wall adapted for mating abutting engagement with a correspondingly angled turbocharger housing end wall. The connector inlet end further includes circumferential axially recessed groove that receives spiral wound gasket in a configuration wherein the gasket forms redundant seals at a plurality of locations. The connector inlet structure cooperates with the turbo charger outlet structure to completely enclose the gasket thereby protecting the gasket from hot corrosive exhaust gases. A V-Band clamp is disposed in covering relation with the connector end wall and abutting turbocharger housing component to secure the connector to the turbocharger. | 02-18-2010 |
| 20100041288 | SUBMERGED EXHAUST DISCHARGE FOR MARINE VESSEL - A marine exhaust system adapted for discharging marine exhaust below the water line through at least one streamlined conformal discharge fitting attached to the vessel hull. Each discharge fitting comprises a low profile body attached to the vessel hull in relation with an exhaust discharge conduit terminating in a thru-hull opening so as to discharge marine exhaust into the discharge fitting body. The discharge fitting preferably includes a forward end and an aft end connecting a main discharge fitting body disposed in spaced relation with the underside of the vessel hull. The discharge fitting body defines an exhaust outlet disposed on outboard side thereof so as to allow exhaust gas to exit in an outward and aft flow such that corrosive exhaust gas does not flow over the vessel propellers. Forward and aft baffles are disposed within the discharge fitting body to direct and re-direct exhaust gas flow. By maintaining a streamlined and low-profile/conformal shape, reduction in overall hull hydrodynamics due to increased drag is minimized. | 02-18-2010 |
| 20100285708 | OUTBOARD ENGINE UNIT - Outboard engine unit includes: an anti-splash plate and an anti-cavitation plate provided on a gear case at a vertical interval from each other and extending horizontally from the gear case; an exhaust port provided in a side surface of the gear case for discharging exhaust gas from an engine; and a protruding section provided on the side surface of the gear case at a position located rearwardly of the exhaust port, the protruding section protruding laterally outwardly from the side surface for changing a direction of water flows flowing along the side surface. | 11-11-2010 |
| 20120083176 | Anti-Ingestion System for a Marine Drive - An anti-ingestion system is provided for a marine drive with a submerged exhaust outlet. An anti-ingestion valve is operated by differential pressure thereacross to a closed condition when the engine is operating in an on state and cooling water is being pumped through a water conduit to an exhaust mixing point, with the anti-ingestion valve blocking passage of cooling water therepast in the noted closed condition. The anti-ingestion valve is operated by differential pressure thereacross to an open condition when the engine is in an off state, and permits passage of air therethrough and communicates atmospheric pressure through the water conduit to the exhaust mixing point to relieve vacuum in the exhaust system. | 04-05-2012 |
| 20130130576 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders, an exhaust manifold, and an exhaust pipe. The exhaust manifold includes a first passage and a second passage. The first passage includes a plurality of first inflow ports into which exhaust gases flow from the plurality of cylinders, a first collecting portion that collects exhaust gases that have flowed into the plurality of first inflow ports, and a first exhaust port through which exhaust gases collected by the first collecting portion are discharged. The second passage includes a second inflow port into which exhaust gases flow and a second exhaust port through which exhaust gases that have flowed into the second inflow port are discharged. The exhaust pipe includes a connection passage through which the first exhaust port and the second inflow port are connected together. | 05-23-2013 |
| 20130130577 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 05-23-2013 |
| 20140106633 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage member, and an idle exhaust passage member. The exhaust passage member defines a main exhaust passage through which exhaust gases of the engine are guided to a main exhaust port disposed in the water, and also defines a portion of an idle exhaust passage through which exhaust gases in the main exhaust passage are guided to an idle exhaust port opened to the atmosphere. The idle exhaust passage member includes an upstream end connected to the exhaust passage member and a downstream end that defines the idle exhaust port and is disposed at a higher position than the upstream end. The idle exhaust passage member is made of a flexible material, and is integrally formed from the upstream end to the downstream end. | 04-17-2014 |
| 20140378014 | VESSEL - A vessel includes an outboard motor including an upstream exhaust port that emits exhaust, a hull including a rear portion on which the outboard motor is mounted, a cabin disposed above the hull, a downstream exhaust port disposed farther to a lateral side than the outboard motor, and an exhaust passage extending from the upstream exhaust port to the downstream exhaust port and guiding the exhaust from the upstream exhaust port to the downstream exhaust port. The cabin includes a windshield disposed in front of the outboard motor in a plan view. The height of the cabin from a rearmost end of the outboard motor is not less than ½ or about ½ of a horizontal distance in a front/rear direction from a rear end edge of the windshield to the rearmost end of the outboard motor. | 12-25-2014 |
| 20090233501 | EXHAUST SYSTEM FOR SMALL WATERCRAFT - An exhaust system for a small watercraft for effectively reducing exhaust noise and allowing a high output of an engine to be easily obtained at the time of high speed operation. An exhaust outlet of an exhaust pipe extending from an engine provided in a watercraft body is disposed at a position that allows it to sink in the water at the time when a travel speed of the watercraft body is a predetermined speed or less. The exhaust outlet is raised above the water at the time when the travel speed of the watercraft body exceeds the predetermined speed. An open surface of the exhaust outlet is offset toward a side wall surface of a pump chamber from a center of a jet pump in the pump chamber and is made oblique toward the side wall surface toward which the open surface of the exhaust outlet is offset. | 09-17-2009 |
| 20120252288 | METHOD AND SYSTEM FOR CONTROLLING THE EXHAUST GASES FROM AN ENGINE - A method for controlling the exit of exhaust gases from an engine which is used to power an underwater propeller drive arranged at the hull bottom of a boat is provided. According to the method exhaust gases are allowed to flow from the engine through an exhaust channel and exit through a first underwater exhaust outlet in the underwater propeller drive. According to the method, if the engine is running and the transmission of the propeller drive is in neutral position, a second underwater exhaust outlet is opened for letting exhaust gases in the exhaust channel exit in a position closer to the hull bottom of the boat than the first underwater exhaust outlet. | 10-04-2012 |
| 20100261393 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage, an idle exhaust passage, a contraction portion and an expansion chamber, a bypass passage, and a check valve. The bypass passage includes an upstream end connected to the idle exhaust passage at a downstream side relative to the contraction portion and the expansion chamber, and a downstream end connected to the idle exhaust passage at an upstream side relative to the contraction portion and the expansion chamber. The check valve is provided in the bypass passage. The check valve is arranged such that air flows only from the upstream end side to the downstream end side. | 10-14-2010 |
| 20140024271 | MOTIVE FORCE OR POWER TAKEOFF DEVICE FOR VESSELS ACTUATED BY THE WATER FLOW GENERATED IN A COLLECTOR OR CONDUCTOR INCORPORATED INTO THE HULL - The device provides a motive force by a water collector or conductor ( | 01-23-2014 |
| 20090269999 | Marine Engine Exhaust Silencing System - A silencing system for a marine exhaust system incorporates a single muffler for each engine of the marine vessel. The muffler is provided with two sound dampening chambers interconnected by several exhaust openings between the chambers. A Y-shaped exhaust type system directs exhaust streams from both sides of an engine toward a single exhaust conduit which extends through a transom of the marine vessel. The muffler is provided with a drain opening that allows water to flow out of the first chamber of the muffler in order to maximize the available volume within that chamber for use in sound attenuation. The outlet of the second chamber is provided with a baffle plate that directs the flow of exhaust gas in a forward direction toward the transom of the marine vessel and a deflection surface that directs the exhaust gas to flow in a downward direction toward the surface of the body of water in which the marine vessel is operated. | 10-29-2009 |
| 20140057508 | MARINE PROPULSION SYSTEMS HAVING EXHAUST GAS RELIEF OUTLET - A marine propulsion system is for propelling a marine vessel in water. The system comprises an outboard motor that is coupled to a marine vessel, and that comprises an exhaust gas relief outlet that is located above the water when the outboard motor is at idle speed. A conduit conveys exhaust gas from the exhaust gas relief outlet to a discharge outlet located on the marine vessel. | 02-27-2014 |
| 20130149921 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. A stopper is provided at a rear end portion of a gear case of the lower unit, and a bush is inserted into and attached to an inner surface of the stopper. An inside diameter of the bush is set to substantially the same diameter as an outside diameter of a front end portion of the propeller boss, and the bush and the propeller boss are disposed by being overlapped with each other in an axial direction. | 06-13-2013 |
| 20130178121 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. An outside diameter of a front end portion of the propeller boss is set to be equal to or larger than an outside diameter of a rear end portion of a gear case in the lower unit. | 07-11-2013 |
| 20100003873 | OUTBOARD MOTOR - An outboard motor includes an engine and an exhaust pipe. The engine has a crank case, a cylinder body, and a cylinder head aligned along the front-rear direction of the outboard motor, and arranged to support a crankshaft so as to extend along an up-down direction. The exhaust pipe is arranged to lead an exhaust gas of the engine to a main exhaust passage positioned below the engine. The cylinder head has an exhaust gas outlet opened in the side portion on one side of the cylinder head in the left-right direction of the outboard motor. The exhaust pipe has a bypass exhaust pipe which, in a plan view, extends from the exhaust gas outlet, bypasses the engine along the crank case, and reaches the other side in the left-right direction of the engine. | 01-07-2010 |
| 20100022148 | EXHAUST DEVICE FOR OUTBOARD MOTOR MULTI-CYLINDER ENGINE - An exhaust device for an outboard motor multi-cylinder engine includes an exhaust passage having a first end connected to the multi-cylinder engine, a catalyst provided in the exhaust passage, and an exhaust chamber connected to a second end of the exhaust passage as well as to a main exhaust passage positioned below the engine. The exhaust passage includes upstream portions for cylinders which have inlet ends respectively connected to exhaust gas outlets of a plurality of cylinders whose exhaust valve opening periods are different, a collecting portion arranged to connect the outlet ends of these upstream portions to each other, and a plurality of downstream portions which are branched from the collecting portion and connected commonly to the exhaust chamber. The catalyst is provided in each of the plurality of downstream portions. | 01-28-2010 |
| 20100056001 | EXHAUST DEVICE FOR OUTBOARD MOTOR ENGINE AND OUTBOARD MOTOR - An exhaust device for an outboard motor engine includes an exhaust passage, a catalyst an air inlet, and an air pump. The exhaust passage is connected to the engine arranged to support a crankshaft extending along an up-down direction. The catalyst is arranged in the exhaust passage. The air inlet is arranged at a position higher than the engine inside an engine cover covering the engine. The air pump is supported by the engine. Further, the air pump is arranged to supply air taken through the air inlet to an upstream side of the catalyst in the exhaust passage. | 03-04-2010 |
| 20100056002 | OUTBOARD MOTOR - An outboard motor includes an engine, a first exhaust passage, a partition, a communication portion, an exhaust gas concentration sensor, and a catalyst. The engine is arranged to support a crankshaft extending along an up-down direction. The first exhaust passage is connected to the engine and is arranged to exhaust exhaust gas of the engine into water. The partition is arranged to partition an inside of the first exhaust passage into an upstream side and a downstream side. The communication portion is arranged to make the upstream side communicate with the downstream side of the partition in the first exhaust passage. The exhaust gas concentration sensor is arranged on the upstream side of the partition in the first exhaust passage. The catalyst is arranged on an upstream side of the exhaust gas concentration sensor in the first exhaust passage. | 03-04-2010 |
| 20100087108 | Concentricity spacer for a catalyst device of a marine engine - The exhaust system for a marine engine provides a concentricity spacer located between an outer surface of a generally tubular member of a catalyst device and an inner surface of a generally tubular cavity formed within a catalyst housing structure. The concentricity spacer is shaped to allow fluid to pass through the spacer in a direction generally parallel to a central axis of the tubular member. | 04-08-2010 |
| 20100087109 | Marine engine with thermally insulated catalyst structures - A catalyst system for a marine engine supports a catalyst device within a catalyst housing structure in such a way that a space is defined around the device in order to thermally insulate the device from the catalyst housing structure. A rim of the catalyst device cooperates with the housing structure to provide a seal at a bottom portion of the catalyst device to trap water within a reservoir to prevent the water from flowing toward exhaust ports of the engine. The space between the catalyst device and the housing structure provides a thermal insulation which allows the catalyst device to operate at an elevated temperature. | 04-08-2010 |
| 20100112878 | Catalyst device for a marine engine which is generally tubular with a rim portion - A catalyst system for a marine engine incorporates a catalyst device within a housing structure. The catalyst device has a rim portion that is disposed within first and second flange surfaces of first and second housing structures. A gasket is provided which is configured to have an opening that allows the rim portion of the catalyst device to be constrained between the first and second flange portions but not between the gasket and either of the first and second flange surfaces. | 05-06-2010 |
| 20100130079 | Marine engine exhaust system having a plurality of catalyst devices disposed in parallel with each other - A catalyst system for a marine engine includes a plurality of catalyst devices arranged in parallel with each other to accommodate a smaller overall size in a preferred dimension to allow more efficient packaging of the catalyst system. | 05-27-2010 |
| 20100240270 | OUTBOARD MOTOR - An outboard motor includes an engine and a catalyst. The engine includes a cylinder and a cylinder head. The engine includes an exhaust port, a catalyst housing portion, a first exhaust passage, and a passage defining member. The exhaust port is provided in the cylinder head. The catalyst housing portion is provided at a side portion of the cylinder head. The first exhaust passage is arranged to guide exhaust discharged from the exhaust port into an interior of the catalyst housing portion. The passage defining member defines a second exhaust passage. The second exhaust passage is arranged such that exhaust that has passed through the interior of the catalyst housing portion flows into the second exhaust passage. The catalyst is held by the engine in a state in which at least a portion of the catalyst is housed in the interior of the catalyst housing portion. | 09-23-2010 |
| 20110039461 | Exhaust plenum for distributing exhaust gas uniformly through a catalyst module - A plenum is provided upstream from a catalyst module and downstream from a plurality of exhaust ports of a marine engine. The plenum is provided with a cross-sectional area that induces exhaust gas to slow as it passes from the plurality of exhaust ports into the plenum. This slowing of the velocity of exhaust gas improves the probability that the exhaust gas will be more evenly distributed across the inlet surface of the catalyst module. | 02-17-2011 |
| 20110070785 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20110070786 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20130029545 | OUTBOARD MOTOR AND METHOD FOR MANUFACTURING OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust manifold, and a lower exhaust passage. The engine includes a plurality of cylinders, and a plurality of exhaust ports. The cylinders are disposed in-line in a vertical direction. The exhaust ports are respectively connected to the cylinders. The exhaust manifold includes a first passage, a second passage, and a third passage. The first passage is connected to the exhaust ports, and extends in a vertical direction. The second passage is connected to the first passage. The third passage is connected to the first passage below the second passage. The lower exhaust passage is connected to the exhaust manifold, and provides a passage through which exhaust gas is expelled to the outside from the exhaust manifold. One of the second passage and the third passage is connected to the lower exhaust passage. | 01-31-2013 |
| 20140287636 | OUTBOARD MOTOR - An outboard motor includes an exhaust pipe that includes an outer wall section, an inner wall section, a coolant passage, and a constricted section. The inner wall section is arranged inward of the outer wall section. The coolant passage is arranged between the outer wall section and the inner wall section. The constricted section is configured to constrict a flow cross section of the coolant passage. A catalytic converter is housed in the exhaust pipe. A temperature sensor is installed in the constricted section and measures a temperature of a pipe wall of the exhaust pipe. | 09-25-2014 |
| 20140322997 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 10-30-2014 |
| 20100240269 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust guide, and a catalyst. The engine includes a cylinder and crankshaft. The crankshaft is disposed along a vertical direction. The exhaust guide is arranged to support the engine from below. The catalyst is disposed in an interior of the engine. The engine includes a cylinder body. The cylinder body includes a housing portion arranged to house—the catalyst. The cylinder body includes a first exhaust passage that includes an interior of the housing portion. The catalyst is inserted into the housing portion from below and is sandwiched from above and below by the housing portion and the exhaust guide. | 09-23-2010 |
| 20100261392 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull having a sealed engine room, an engine installed in the engine room, a jet propulsion unit arranged to be driven by the engine so as to suck in water from around the hull and jet the water, a saddle type seat disposed above the engine room, a first exhaust pipe, an exhaust pipe cooling unit, and a catalyst unit. The first exhaust pipe is attached to a side of the engine inside the engine room, extends rearward from the side of the engine, and is arranged to guide exhaust gas discharged from the engine. The exhaust pipe cooling unit is arranged to cool the first exhaust pipe. The catalyst unit is connected to the first exhaust pipe, is disposed inside the engine room so as to oppose a rear surface of the engine, and is arranged to promote reaction of components contained in the exhaust gas. | 10-14-2010 |
| 20110223819 | OUTBOARD MOTOR - An outboard motor includes an engine, a housing, a catalyst, and an engine cover. The housing includes a partitioning wall that is arranged to partition an interior of the housing into a first exhaust space connected to exhaust ports of the engine, and a second exhaust space connected to the first exhaust space. The housing is arranged such that the second exhaust space is positioned at the same side as the first exhaust space with respect to a plane that includes central axes of the plurality of the cylinders. The catalyst is positioned at a height such that at least a portion of the catalyst overlaps with the first exhaust space when viewed from a horizontal direction. The catalyst is disposed in the second exhaust space so as to guide the exhaust guided from the first exhaust space to the second exhaust space. | 09-15-2011 |
| 20160129982 | BOAT DRIVE - A boat drive including combustion engine located within the hull and a drive unit located outside the hull. The drive has a propeller shaft and an exhaust system with an exhaust duct and an outlet. The exhaust duct connects the engine to the exhaust outlet for carrying away exhaust gases from the engine and cooling water introduced into the exhaust duct. The exhaust outlet is arranged in the propeller shaft. A first exhaust release opening is arranged in the exhaust duct, between the engine and the exhaust outlet, so that during operation, a first fraction of the exhaust gases and cooling water is discharged through the first exhaust release opening, while a second fraction of the exhaust gases and the cooling water is discharged through the exhaust outlet. A device is provided for adjusting the first fraction that can be discharged through the first exhaust release opening. | 05-12-2016 |
| 20100285707 | OUTBOARD ENGINE UNIT - Exhaust passage system in an outboard engine unit includes: an engine-side exhaust pipe; a downstream exhaust pipe for directing exhaust gas downstream from the engine-side exhaust pipe, a lower end portion of the engine-side exhaust pipe and an upper end portion of the downstream exhaust pipe being positioned in horizontally parallel to each other and horizontally overlap each other so as to provide fluid communication therebetween via a through-hole formed in the overlapping portions of the end portions; and a vertical partition wall provided, in an upper end region of the overlapping portions for hampering back-flows of fluid. | 11-11-2010 |
| 20090047849 | Marine engine exhaust system with cooling arrangement - A marine engine exhaust system is provided. The system includes a first and second manifold. A first conduit is in fluid communication with the first manifold so that a first gas is transferred into a first gas passageway of the first conduit. The first conduit has a first cooling fluid passageway. A second conduit is in fluid communication with the second manifold so that a second gas exiting the second manifold is transferred into a second gas passageway of the second conduit. The second conduit has a second cooling fluid passageway. Cooling fluid is transferred through the first cooling fluid passageway so as to have a direction of flow through the first conduit opposite to the direction of flow of the first gas through the first gas passageway of the first conduit. | 02-19-2009 |
| 20110306254 | WATER JACKETED MARINE EXHAUST COMPONENTS HAVING MULTIPLE STREAM SPRAY RING CONFIGURATIONS - A water jacketed exhaust component includes an exhaust pipe having a radially inwardly tapered tail end, a water jacket disposed in surrounding relation with the exhaust pipe, and a generally V-shaped spray ring. The spray ring includes a first and second set of apertures that create diverging streams of cooling water. A first set of apertures creates an annularly disposed series of streams that are directed downstream and radially inward. These streams are generally directed toward the outer surface of the exhaust pipe structure which extends downstream of the spray ring. A second set of apertures creates an annularly disposed series of streams that are directed downstream and radially outward. These streams are generally directed toward the inner surface of the water jacket structure extending downstream of the spray ring. By providing a water jacketed exhaust component with a spray ring that creates diverging streams of cooling water, the present invention provides a water jacketed marine exhaust component that provides improved exhaust gas cooling over a wider range of engine operating conditions. An alternate embodiment includes a V-shaped spray ring configured to create converging streams of cooling water. | 12-15-2011 |
| 20130203308 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a first exhaust passage including an upward guiding portion that guides exhaust generated by an engine upward, a second exhaust passage disposed at a downstream side relative to the first exhaust passage, and a communication passage communicating the first exhaust passage and the second exhaust passage with each other. The communication passage includes a first upstream end opening at the first exhaust passage and a second downstream end disposed below the first upstream end and opening at the second exhaust passage. Further, the communication passage includes an expanded portion disposed at a height in between the first upstream end and the second downstream end and being more expanded than the first upstream end and the second downstream end. | 08-08-2013 |
| 20130203309 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes an exhaust passage guiding exhaust generated at an engine, a water jacket cooling at least a portion of the exhaust passage, a cooling device supplying water outside the vessel propulsion apparatus to the water jacket, an exhaust sensor detecting a concentration of a component in the exhaust in the exhaust passage, and a non-catalytic porous member disposed in the exhaust passage at an upstream side relative to the exhaust sensor. The non-catalytic porous member is a porous member that does not hold a catalyst. | 08-08-2013 |
| 440089000 | Jackets for pipe, exhaust manifold or expansion chamber | 4 |
| 20080242164 | Marine engine exhaust system - A marine engine exhaust system is provided. One exemplary embodiment of the system includes first and second manifolds. A first gas is transferred through a first conduit from the first manifold and is isolated from cooling water through at least a portion of the first conduit. A second conduit is in fluid communication with the second manifold and allows a second gas to be transferred through that is isolated from cooling water through a portion of its length. The first and second conduits are in fluid communication with a third conduit in which the first and second gases merge. Cooling water is merged with either the first or second gas, or both, in the first and second conduits before the first gas and second gas merge in the third conduit. | 10-02-2008 |
| 20090156071 | ENGINE EXHAUST BYPASS SYSTEM FOR OCEAN VESSEL - A primary exhaust bypass for a water-borne vessel having a seat member and a closure member coupled to the seat member, wherein the seat and closure members are configured to seal against exhaust leakage in the closed position and to allow exhaust leakage in the opened condition, and a locking mechanism, wherein the bypass is configured to open when the vessel lists a predetermined amount. A method of bypassing a blocked primary exhaust system may include establishing a bypass exhaust route, providing a normally-closed bypass mechanism at a distal portion of the bypass exhaust route, and changing the orientation of the bypass mechanism with respect to gravity, which may allow the bypass mechanism to open. | 06-18-2009 |
| 20090197489 | EXHAUST INTAKE BONNET (EIB) FOR MARITIME EMISSIONS CONTROL SYSTEM - An improved Exhaust Intake Bonnet (EIB) for an Advanced Maritime Emissions Control System (AMECS) includes a shroud carried by a rigid upper frame and a lowerable and raisable rigid lower frame. The upper frame includes a peak with a duct for receiving exhaust gasses captured by the shroud and winches for lowering and raising the lower frame. The shroud is expandable when the lower frame is lowered and collapsible when the lower frame is raised and has a cinchable base. The AMECS is joined to a ship by positioning the EIB over a ship's exhaust stack using a deployment arm. The shroud is then lowered over the stack and then cinched around the stack to provide a soft attachment between the EIB and the ship's stack. Later, the steps are reversed to separate the AMECS from the ship. | 08-06-2009 |
| 20090233502 | Friction reducing pollution control system for marine vehicles - An exhaust redirect line in communication with an engine exhaust channel of a marine vehicle receiving exhaust gas. A blower unit in the exhaust redirect line directing the exhaust gas through the exhaust redirect line. A mixing chamber in communication with the exhaust redirect line receiving the engine exhaust gas. An injector unit in communication with the mixing chamber introducing a chemical agent, air and water into the mixing chamber to provide a treated exhaust gas. An output vane disposed on an exterior underside of a hull being in communication with the mixing chamber discharging the treated exhaust gas underneath the hull as a foam, whereby the engine exhaust gas is encapsulated and detoxified by the chemical agent in the foam to prevent the exhaust gas from entering the surrounding water and wherein the foam reduces friction between the hull and the surrounding water to improve engine efficiency. | 09-17-2009 |
| 20090270000 | Exhaust system of a marine vessel - An exhaust system for a marine propulsion device is configured to dispose two exhaust conduits in generally concentric overlapping relation with each other in order to minimize the potential cross sectional area of a leak path in the event that a seal fails. One of the exhaust conduits extends through a transom or other surface of a marine vessel and another exhaust conduit conducts exhaust gas from an engine to the exhaust conduit extending through the surface of the marine vessel. | 10-29-2009 |
| 20100041287 | GASKETED CONNECTION OF MARINE ENGINE EXHAUST OUTLET TO EXHAUST CONDUIT - A connecting flange comprises a generally open ended cylindrical body having an inlet adapted for receiving a gasket for providing a sealing connection with a turbocharger housing, and an outlet for connection to marine exhaust conduit. The connector inlet terminates in an end having a radially flared angularly disposed end wall adapted for mating abutting engagement with a correspondingly angled turbocharger housing end wall. The connector inlet end further includes circumferential axially recessed groove that receives spiral wound gasket in a configuration wherein the gasket forms redundant seals at a plurality of locations. The connector inlet structure cooperates with the turbo charger outlet structure to completely enclose the gasket thereby protecting the gasket from hot corrosive exhaust gases. A V-Band clamp is disposed in covering relation with the connector end wall and abutting turbocharger housing component to secure the connector to the turbocharger. | 02-18-2010 |
| 20100041288 | SUBMERGED EXHAUST DISCHARGE FOR MARINE VESSEL - A marine exhaust system adapted for discharging marine exhaust below the water line through at least one streamlined conformal discharge fitting attached to the vessel hull. Each discharge fitting comprises a low profile body attached to the vessel hull in relation with an exhaust discharge conduit terminating in a thru-hull opening so as to discharge marine exhaust into the discharge fitting body. The discharge fitting preferably includes a forward end and an aft end connecting a main discharge fitting body disposed in spaced relation with the underside of the vessel hull. The discharge fitting body defines an exhaust outlet disposed on outboard side thereof so as to allow exhaust gas to exit in an outward and aft flow such that corrosive exhaust gas does not flow over the vessel propellers. Forward and aft baffles are disposed within the discharge fitting body to direct and re-direct exhaust gas flow. By maintaining a streamlined and low-profile/conformal shape, reduction in overall hull hydrodynamics due to increased drag is minimized. | 02-18-2010 |
| 20100285708 | OUTBOARD ENGINE UNIT - Outboard engine unit includes: an anti-splash plate and an anti-cavitation plate provided on a gear case at a vertical interval from each other and extending horizontally from the gear case; an exhaust port provided in a side surface of the gear case for discharging exhaust gas from an engine; and a protruding section provided on the side surface of the gear case at a position located rearwardly of the exhaust port, the protruding section protruding laterally outwardly from the side surface for changing a direction of water flows flowing along the side surface. | 11-11-2010 |
| 20120083176 | Anti-Ingestion System for a Marine Drive - An anti-ingestion system is provided for a marine drive with a submerged exhaust outlet. An anti-ingestion valve is operated by differential pressure thereacross to a closed condition when the engine is operating in an on state and cooling water is being pumped through a water conduit to an exhaust mixing point, with the anti-ingestion valve blocking passage of cooling water therepast in the noted closed condition. The anti-ingestion valve is operated by differential pressure thereacross to an open condition when the engine is in an off state, and permits passage of air therethrough and communicates atmospheric pressure through the water conduit to the exhaust mixing point to relieve vacuum in the exhaust system. | 04-05-2012 |
| 20130130576 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders, an exhaust manifold, and an exhaust pipe. The exhaust manifold includes a first passage and a second passage. The first passage includes a plurality of first inflow ports into which exhaust gases flow from the plurality of cylinders, a first collecting portion that collects exhaust gases that have flowed into the plurality of first inflow ports, and a first exhaust port through which exhaust gases collected by the first collecting portion are discharged. The second passage includes a second inflow port into which exhaust gases flow and a second exhaust port through which exhaust gases that have flowed into the second inflow port are discharged. The exhaust pipe includes a connection passage through which the first exhaust port and the second inflow port are connected together. | 05-23-2013 |
| 20130130577 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 05-23-2013 |
| 20140106633 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage member, and an idle exhaust passage member. The exhaust passage member defines a main exhaust passage through which exhaust gases of the engine are guided to a main exhaust port disposed in the water, and also defines a portion of an idle exhaust passage through which exhaust gases in the main exhaust passage are guided to an idle exhaust port opened to the atmosphere. The idle exhaust passage member includes an upstream end connected to the exhaust passage member and a downstream end that defines the idle exhaust port and is disposed at a higher position than the upstream end. The idle exhaust passage member is made of a flexible material, and is integrally formed from the upstream end to the downstream end. | 04-17-2014 |
| 20140378014 | VESSEL - A vessel includes an outboard motor including an upstream exhaust port that emits exhaust, a hull including a rear portion on which the outboard motor is mounted, a cabin disposed above the hull, a downstream exhaust port disposed farther to a lateral side than the outboard motor, and an exhaust passage extending from the upstream exhaust port to the downstream exhaust port and guiding the exhaust from the upstream exhaust port to the downstream exhaust port. The cabin includes a windshield disposed in front of the outboard motor in a plan view. The height of the cabin from a rearmost end of the outboard motor is not less than ½ or about ½ of a horizontal distance in a front/rear direction from a rear end edge of the windshield to the rearmost end of the outboard motor. | 12-25-2014 |
| 20090233501 | EXHAUST SYSTEM FOR SMALL WATERCRAFT - An exhaust system for a small watercraft for effectively reducing exhaust noise and allowing a high output of an engine to be easily obtained at the time of high speed operation. An exhaust outlet of an exhaust pipe extending from an engine provided in a watercraft body is disposed at a position that allows it to sink in the water at the time when a travel speed of the watercraft body is a predetermined speed or less. The exhaust outlet is raised above the water at the time when the travel speed of the watercraft body exceeds the predetermined speed. An open surface of the exhaust outlet is offset toward a side wall surface of a pump chamber from a center of a jet pump in the pump chamber and is made oblique toward the side wall surface toward which the open surface of the exhaust outlet is offset. | 09-17-2009 |
| 20120252288 | METHOD AND SYSTEM FOR CONTROLLING THE EXHAUST GASES FROM AN ENGINE - A method for controlling the exit of exhaust gases from an engine which is used to power an underwater propeller drive arranged at the hull bottom of a boat is provided. According to the method exhaust gases are allowed to flow from the engine through an exhaust channel and exit through a first underwater exhaust outlet in the underwater propeller drive. According to the method, if the engine is running and the transmission of the propeller drive is in neutral position, a second underwater exhaust outlet is opened for letting exhaust gases in the exhaust channel exit in a position closer to the hull bottom of the boat than the first underwater exhaust outlet. | 10-04-2012 |
| 20100261393 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage, an idle exhaust passage, a contraction portion and an expansion chamber, a bypass passage, and a check valve. The bypass passage includes an upstream end connected to the idle exhaust passage at a downstream side relative to the contraction portion and the expansion chamber, and a downstream end connected to the idle exhaust passage at an upstream side relative to the contraction portion and the expansion chamber. The check valve is provided in the bypass passage. The check valve is arranged such that air flows only from the upstream end side to the downstream end side. | 10-14-2010 |
| 20140024271 | MOTIVE FORCE OR POWER TAKEOFF DEVICE FOR VESSELS ACTUATED BY THE WATER FLOW GENERATED IN A COLLECTOR OR CONDUCTOR INCORPORATED INTO THE HULL - The device provides a motive force by a water collector or conductor ( | 01-23-2014 |
| 20090269999 | Marine Engine Exhaust Silencing System - A silencing system for a marine exhaust system incorporates a single muffler for each engine of the marine vessel. The muffler is provided with two sound dampening chambers interconnected by several exhaust openings between the chambers. A Y-shaped exhaust type system directs exhaust streams from both sides of an engine toward a single exhaust conduit which extends through a transom of the marine vessel. The muffler is provided with a drain opening that allows water to flow out of the first chamber of the muffler in order to maximize the available volume within that chamber for use in sound attenuation. The outlet of the second chamber is provided with a baffle plate that directs the flow of exhaust gas in a forward direction toward the transom of the marine vessel and a deflection surface that directs the exhaust gas to flow in a downward direction toward the surface of the body of water in which the marine vessel is operated. | 10-29-2009 |
| 20140057508 | MARINE PROPULSION SYSTEMS HAVING EXHAUST GAS RELIEF OUTLET - A marine propulsion system is for propelling a marine vessel in water. The system comprises an outboard motor that is coupled to a marine vessel, and that comprises an exhaust gas relief outlet that is located above the water when the outboard motor is at idle speed. A conduit conveys exhaust gas from the exhaust gas relief outlet to a discharge outlet located on the marine vessel. | 02-27-2014 |
| 20130149921 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. A stopper is provided at a rear end portion of a gear case of the lower unit, and a bush is inserted into and attached to an inner surface of the stopper. An inside diameter of the bush is set to substantially the same diameter as an outside diameter of a front end portion of the propeller boss, and the bush and the propeller boss are disposed by being overlapped with each other in an axial direction. | 06-13-2013 |
| 20130178121 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. An outside diameter of a front end portion of the propeller boss is set to be equal to or larger than an outside diameter of a rear end portion of a gear case in the lower unit. | 07-11-2013 |
| 20100003873 | OUTBOARD MOTOR - An outboard motor includes an engine and an exhaust pipe. The engine has a crank case, a cylinder body, and a cylinder head aligned along the front-rear direction of the outboard motor, and arranged to support a crankshaft so as to extend along an up-down direction. The exhaust pipe is arranged to lead an exhaust gas of the engine to a main exhaust passage positioned below the engine. The cylinder head has an exhaust gas outlet opened in the side portion on one side of the cylinder head in the left-right direction of the outboard motor. The exhaust pipe has a bypass exhaust pipe which, in a plan view, extends from the exhaust gas outlet, bypasses the engine along the crank case, and reaches the other side in the left-right direction of the engine. | 01-07-2010 |
| 20100022148 | EXHAUST DEVICE FOR OUTBOARD MOTOR MULTI-CYLINDER ENGINE - An exhaust device for an outboard motor multi-cylinder engine includes an exhaust passage having a first end connected to the multi-cylinder engine, a catalyst provided in the exhaust passage, and an exhaust chamber connected to a second end of the exhaust passage as well as to a main exhaust passage positioned below the engine. The exhaust passage includes upstream portions for cylinders which have inlet ends respectively connected to exhaust gas outlets of a plurality of cylinders whose exhaust valve opening periods are different, a collecting portion arranged to connect the outlet ends of these upstream portions to each other, and a plurality of downstream portions which are branched from the collecting portion and connected commonly to the exhaust chamber. The catalyst is provided in each of the plurality of downstream portions. | 01-28-2010 |
| 20100056001 | EXHAUST DEVICE FOR OUTBOARD MOTOR ENGINE AND OUTBOARD MOTOR - An exhaust device for an outboard motor engine includes an exhaust passage, a catalyst an air inlet, and an air pump. The exhaust passage is connected to the engine arranged to support a crankshaft extending along an up-down direction. The catalyst is arranged in the exhaust passage. The air inlet is arranged at a position higher than the engine inside an engine cover covering the engine. The air pump is supported by the engine. Further, the air pump is arranged to supply air taken through the air inlet to an upstream side of the catalyst in the exhaust passage. | 03-04-2010 |
| 20100056002 | OUTBOARD MOTOR - An outboard motor includes an engine, a first exhaust passage, a partition, a communication portion, an exhaust gas concentration sensor, and a catalyst. The engine is arranged to support a crankshaft extending along an up-down direction. The first exhaust passage is connected to the engine and is arranged to exhaust exhaust gas of the engine into water. The partition is arranged to partition an inside of the first exhaust passage into an upstream side and a downstream side. The communication portion is arranged to make the upstream side communicate with the downstream side of the partition in the first exhaust passage. The exhaust gas concentration sensor is arranged on the upstream side of the partition in the first exhaust passage. The catalyst is arranged on an upstream side of the exhaust gas concentration sensor in the first exhaust passage. | 03-04-2010 |
| 20100087108 | Concentricity spacer for a catalyst device of a marine engine - The exhaust system for a marine engine provides a concentricity spacer located between an outer surface of a generally tubular member of a catalyst device and an inner surface of a generally tubular cavity formed within a catalyst housing structure. The concentricity spacer is shaped to allow fluid to pass through the spacer in a direction generally parallel to a central axis of the tubular member. | 04-08-2010 |
| 20100087109 | Marine engine with thermally insulated catalyst structures - A catalyst system for a marine engine supports a catalyst device within a catalyst housing structure in such a way that a space is defined around the device in order to thermally insulate the device from the catalyst housing structure. A rim of the catalyst device cooperates with the housing structure to provide a seal at a bottom portion of the catalyst device to trap water within a reservoir to prevent the water from flowing toward exhaust ports of the engine. The space between the catalyst device and the housing structure provides a thermal insulation which allows the catalyst device to operate at an elevated temperature. | 04-08-2010 |
| 20100112878 | Catalyst device for a marine engine which is generally tubular with a rim portion - A catalyst system for a marine engine incorporates a catalyst device within a housing structure. The catalyst device has a rim portion that is disposed within first and second flange surfaces of first and second housing structures. A gasket is provided which is configured to have an opening that allows the rim portion of the catalyst device to be constrained between the first and second flange portions but not between the gasket and either of the first and second flange surfaces. | 05-06-2010 |
| 20100130079 | Marine engine exhaust system having a plurality of catalyst devices disposed in parallel with each other - A catalyst system for a marine engine includes a plurality of catalyst devices arranged in parallel with each other to accommodate a smaller overall size in a preferred dimension to allow more efficient packaging of the catalyst system. | 05-27-2010 |
| 20100240270 | OUTBOARD MOTOR - An outboard motor includes an engine and a catalyst. The engine includes a cylinder and a cylinder head. The engine includes an exhaust port, a catalyst housing portion, a first exhaust passage, and a passage defining member. The exhaust port is provided in the cylinder head. The catalyst housing portion is provided at a side portion of the cylinder head. The first exhaust passage is arranged to guide exhaust discharged from the exhaust port into an interior of the catalyst housing portion. The passage defining member defines a second exhaust passage. The second exhaust passage is arranged such that exhaust that has passed through the interior of the catalyst housing portion flows into the second exhaust passage. The catalyst is held by the engine in a state in which at least a portion of the catalyst is housed in the interior of the catalyst housing portion. | 09-23-2010 |
| 20110039461 | Exhaust plenum for distributing exhaust gas uniformly through a catalyst module - A plenum is provided upstream from a catalyst module and downstream from a plurality of exhaust ports of a marine engine. The plenum is provided with a cross-sectional area that induces exhaust gas to slow as it passes from the plurality of exhaust ports into the plenum. This slowing of the velocity of exhaust gas improves the probability that the exhaust gas will be more evenly distributed across the inlet surface of the catalyst module. | 02-17-2011 |
| 20110070785 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20110070786 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20130029545 | OUTBOARD MOTOR AND METHOD FOR MANUFACTURING OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust manifold, and a lower exhaust passage. The engine includes a plurality of cylinders, and a plurality of exhaust ports. The cylinders are disposed in-line in a vertical direction. The exhaust ports are respectively connected to the cylinders. The exhaust manifold includes a first passage, a second passage, and a third passage. The first passage is connected to the exhaust ports, and extends in a vertical direction. The second passage is connected to the first passage. The third passage is connected to the first passage below the second passage. The lower exhaust passage is connected to the exhaust manifold, and provides a passage through which exhaust gas is expelled to the outside from the exhaust manifold. One of the second passage and the third passage is connected to the lower exhaust passage. | 01-31-2013 |
| 20140287636 | OUTBOARD MOTOR - An outboard motor includes an exhaust pipe that includes an outer wall section, an inner wall section, a coolant passage, and a constricted section. The inner wall section is arranged inward of the outer wall section. The coolant passage is arranged between the outer wall section and the inner wall section. The constricted section is configured to constrict a flow cross section of the coolant passage. A catalytic converter is housed in the exhaust pipe. A temperature sensor is installed in the constricted section and measures a temperature of a pipe wall of the exhaust pipe. | 09-25-2014 |
| 20140322997 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 10-30-2014 |
| 20100240269 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust guide, and a catalyst. The engine includes a cylinder and crankshaft. The crankshaft is disposed along a vertical direction. The exhaust guide is arranged to support the engine from below. The catalyst is disposed in an interior of the engine. The engine includes a cylinder body. The cylinder body includes a housing portion arranged to house—the catalyst. The cylinder body includes a first exhaust passage that includes an interior of the housing portion. The catalyst is inserted into the housing portion from below and is sandwiched from above and below by the housing portion and the exhaust guide. | 09-23-2010 |
| 20100261392 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull having a sealed engine room, an engine installed in the engine room, a jet propulsion unit arranged to be driven by the engine so as to suck in water from around the hull and jet the water, a saddle type seat disposed above the engine room, a first exhaust pipe, an exhaust pipe cooling unit, and a catalyst unit. The first exhaust pipe is attached to a side of the engine inside the engine room, extends rearward from the side of the engine, and is arranged to guide exhaust gas discharged from the engine. The exhaust pipe cooling unit is arranged to cool the first exhaust pipe. The catalyst unit is connected to the first exhaust pipe, is disposed inside the engine room so as to oppose a rear surface of the engine, and is arranged to promote reaction of components contained in the exhaust gas. | 10-14-2010 |
| 20110223819 | OUTBOARD MOTOR - An outboard motor includes an engine, a housing, a catalyst, and an engine cover. The housing includes a partitioning wall that is arranged to partition an interior of the housing into a first exhaust space connected to exhaust ports of the engine, and a second exhaust space connected to the first exhaust space. The housing is arranged such that the second exhaust space is positioned at the same side as the first exhaust space with respect to a plane that includes central axes of the plurality of the cylinders. The catalyst is positioned at a height such that at least a portion of the catalyst overlaps with the first exhaust space when viewed from a horizontal direction. The catalyst is disposed in the second exhaust space so as to guide the exhaust guided from the first exhaust space to the second exhaust space. | 09-15-2011 |
| 20160129982 | BOAT DRIVE - A boat drive including combustion engine located within the hull and a drive unit located outside the hull. The drive has a propeller shaft and an exhaust system with an exhaust duct and an outlet. The exhaust duct connects the engine to the exhaust outlet for carrying away exhaust gases from the engine and cooling water introduced into the exhaust duct. The exhaust outlet is arranged in the propeller shaft. A first exhaust release opening is arranged in the exhaust duct, between the engine and the exhaust outlet, so that during operation, a first fraction of the exhaust gases and cooling water is discharged through the first exhaust release opening, while a second fraction of the exhaust gases and the cooling water is discharged through the exhaust outlet. A device is provided for adjusting the first fraction that can be discharged through the first exhaust release opening. | 05-12-2016 |
| 20100285707 | OUTBOARD ENGINE UNIT - Exhaust passage system in an outboard engine unit includes: an engine-side exhaust pipe; a downstream exhaust pipe for directing exhaust gas downstream from the engine-side exhaust pipe, a lower end portion of the engine-side exhaust pipe and an upper end portion of the downstream exhaust pipe being positioned in horizontally parallel to each other and horizontally overlap each other so as to provide fluid communication therebetween via a through-hole formed in the overlapping portions of the end portions; and a vertical partition wall provided, in an upper end region of the overlapping portions for hampering back-flows of fluid. | 11-11-2010 |
| 20090047849 | Marine engine exhaust system with cooling arrangement - A marine engine exhaust system is provided. The system includes a first and second manifold. A first conduit is in fluid communication with the first manifold so that a first gas is transferred into a first gas passageway of the first conduit. The first conduit has a first cooling fluid passageway. A second conduit is in fluid communication with the second manifold so that a second gas exiting the second manifold is transferred into a second gas passageway of the second conduit. The second conduit has a second cooling fluid passageway. Cooling fluid is transferred through the first cooling fluid passageway so as to have a direction of flow through the first conduit opposite to the direction of flow of the first gas through the first gas passageway of the first conduit. | 02-19-2009 |
| 20110306254 | WATER JACKETED MARINE EXHAUST COMPONENTS HAVING MULTIPLE STREAM SPRAY RING CONFIGURATIONS - A water jacketed exhaust component includes an exhaust pipe having a radially inwardly tapered tail end, a water jacket disposed in surrounding relation with the exhaust pipe, and a generally V-shaped spray ring. The spray ring includes a first and second set of apertures that create diverging streams of cooling water. A first set of apertures creates an annularly disposed series of streams that are directed downstream and radially inward. These streams are generally directed toward the outer surface of the exhaust pipe structure which extends downstream of the spray ring. A second set of apertures creates an annularly disposed series of streams that are directed downstream and radially outward. These streams are generally directed toward the inner surface of the water jacket structure extending downstream of the spray ring. By providing a water jacketed exhaust component with a spray ring that creates diverging streams of cooling water, the present invention provides a water jacketed marine exhaust component that provides improved exhaust gas cooling over a wider range of engine operating conditions. An alternate embodiment includes a V-shaped spray ring configured to create converging streams of cooling water. | 12-15-2011 |
| 20130203308 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a first exhaust passage including an upward guiding portion that guides exhaust generated by an engine upward, a second exhaust passage disposed at a downstream side relative to the first exhaust passage, and a communication passage communicating the first exhaust passage and the second exhaust passage with each other. The communication passage includes a first upstream end opening at the first exhaust passage and a second downstream end disposed below the first upstream end and opening at the second exhaust passage. Further, the communication passage includes an expanded portion disposed at a height in between the first upstream end and the second downstream end and being more expanded than the first upstream end and the second downstream end. | 08-08-2013 |
| 20130203309 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes an exhaust passage guiding exhaust generated at an engine, a water jacket cooling at least a portion of the exhaust passage, a cooling device supplying water outside the vessel propulsion apparatus to the water jacket, an exhaust sensor detecting a concentration of a component in the exhaust in the exhaust passage, and a non-catalytic porous member disposed in the exhaust passage at an upstream side relative to the exhaust sensor. The non-catalytic porous member is a porous member that does not hold a catalyst. | 08-08-2013 |
| 440089000 | Preventing reverse flow of exhaust | 2 |
| 20080242164 | Marine engine exhaust system - A marine engine exhaust system is provided. One exemplary embodiment of the system includes first and second manifolds. A first gas is transferred through a first conduit from the first manifold and is isolated from cooling water through at least a portion of the first conduit. A second conduit is in fluid communication with the second manifold and allows a second gas to be transferred through that is isolated from cooling water through a portion of its length. The first and second conduits are in fluid communication with a third conduit in which the first and second gases merge. Cooling water is merged with either the first or second gas, or both, in the first and second conduits before the first gas and second gas merge in the third conduit. | 10-02-2008 |
| 20090156071 | ENGINE EXHAUST BYPASS SYSTEM FOR OCEAN VESSEL - A primary exhaust bypass for a water-borne vessel having a seat member and a closure member coupled to the seat member, wherein the seat and closure members are configured to seal against exhaust leakage in the closed position and to allow exhaust leakage in the opened condition, and a locking mechanism, wherein the bypass is configured to open when the vessel lists a predetermined amount. A method of bypassing a blocked primary exhaust system may include establishing a bypass exhaust route, providing a normally-closed bypass mechanism at a distal portion of the bypass exhaust route, and changing the orientation of the bypass mechanism with respect to gravity, which may allow the bypass mechanism to open. | 06-18-2009 |
| 20090197489 | EXHAUST INTAKE BONNET (EIB) FOR MARITIME EMISSIONS CONTROL SYSTEM - An improved Exhaust Intake Bonnet (EIB) for an Advanced Maritime Emissions Control System (AMECS) includes a shroud carried by a rigid upper frame and a lowerable and raisable rigid lower frame. The upper frame includes a peak with a duct for receiving exhaust gasses captured by the shroud and winches for lowering and raising the lower frame. The shroud is expandable when the lower frame is lowered and collapsible when the lower frame is raised and has a cinchable base. The AMECS is joined to a ship by positioning the EIB over a ship's exhaust stack using a deployment arm. The shroud is then lowered over the stack and then cinched around the stack to provide a soft attachment between the EIB and the ship's stack. Later, the steps are reversed to separate the AMECS from the ship. | 08-06-2009 |
| 20090233502 | Friction reducing pollution control system for marine vehicles - An exhaust redirect line in communication with an engine exhaust channel of a marine vehicle receiving exhaust gas. A blower unit in the exhaust redirect line directing the exhaust gas through the exhaust redirect line. A mixing chamber in communication with the exhaust redirect line receiving the engine exhaust gas. An injector unit in communication with the mixing chamber introducing a chemical agent, air and water into the mixing chamber to provide a treated exhaust gas. An output vane disposed on an exterior underside of a hull being in communication with the mixing chamber discharging the treated exhaust gas underneath the hull as a foam, whereby the engine exhaust gas is encapsulated and detoxified by the chemical agent in the foam to prevent the exhaust gas from entering the surrounding water and wherein the foam reduces friction between the hull and the surrounding water to improve engine efficiency. | 09-17-2009 |
| 20090270000 | Exhaust system of a marine vessel - An exhaust system for a marine propulsion device is configured to dispose two exhaust conduits in generally concentric overlapping relation with each other in order to minimize the potential cross sectional area of a leak path in the event that a seal fails. One of the exhaust conduits extends through a transom or other surface of a marine vessel and another exhaust conduit conducts exhaust gas from an engine to the exhaust conduit extending through the surface of the marine vessel. | 10-29-2009 |
| 20100041287 | GASKETED CONNECTION OF MARINE ENGINE EXHAUST OUTLET TO EXHAUST CONDUIT - A connecting flange comprises a generally open ended cylindrical body having an inlet adapted for receiving a gasket for providing a sealing connection with a turbocharger housing, and an outlet for connection to marine exhaust conduit. The connector inlet terminates in an end having a radially flared angularly disposed end wall adapted for mating abutting engagement with a correspondingly angled turbocharger housing end wall. The connector inlet end further includes circumferential axially recessed groove that receives spiral wound gasket in a configuration wherein the gasket forms redundant seals at a plurality of locations. The connector inlet structure cooperates with the turbo charger outlet structure to completely enclose the gasket thereby protecting the gasket from hot corrosive exhaust gases. A V-Band clamp is disposed in covering relation with the connector end wall and abutting turbocharger housing component to secure the connector to the turbocharger. | 02-18-2010 |
| 20100041288 | SUBMERGED EXHAUST DISCHARGE FOR MARINE VESSEL - A marine exhaust system adapted for discharging marine exhaust below the water line through at least one streamlined conformal discharge fitting attached to the vessel hull. Each discharge fitting comprises a low profile body attached to the vessel hull in relation with an exhaust discharge conduit terminating in a thru-hull opening so as to discharge marine exhaust into the discharge fitting body. The discharge fitting preferably includes a forward end and an aft end connecting a main discharge fitting body disposed in spaced relation with the underside of the vessel hull. The discharge fitting body defines an exhaust outlet disposed on outboard side thereof so as to allow exhaust gas to exit in an outward and aft flow such that corrosive exhaust gas does not flow over the vessel propellers. Forward and aft baffles are disposed within the discharge fitting body to direct and re-direct exhaust gas flow. By maintaining a streamlined and low-profile/conformal shape, reduction in overall hull hydrodynamics due to increased drag is minimized. | 02-18-2010 |
| 20100285708 | OUTBOARD ENGINE UNIT - Outboard engine unit includes: an anti-splash plate and an anti-cavitation plate provided on a gear case at a vertical interval from each other and extending horizontally from the gear case; an exhaust port provided in a side surface of the gear case for discharging exhaust gas from an engine; and a protruding section provided on the side surface of the gear case at a position located rearwardly of the exhaust port, the protruding section protruding laterally outwardly from the side surface for changing a direction of water flows flowing along the side surface. | 11-11-2010 |
| 20120083176 | Anti-Ingestion System for a Marine Drive - An anti-ingestion system is provided for a marine drive with a submerged exhaust outlet. An anti-ingestion valve is operated by differential pressure thereacross to a closed condition when the engine is operating in an on state and cooling water is being pumped through a water conduit to an exhaust mixing point, with the anti-ingestion valve blocking passage of cooling water therepast in the noted closed condition. The anti-ingestion valve is operated by differential pressure thereacross to an open condition when the engine is in an off state, and permits passage of air therethrough and communicates atmospheric pressure through the water conduit to the exhaust mixing point to relieve vacuum in the exhaust system. | 04-05-2012 |
| 20130130576 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders, an exhaust manifold, and an exhaust pipe. The exhaust manifold includes a first passage and a second passage. The first passage includes a plurality of first inflow ports into which exhaust gases flow from the plurality of cylinders, a first collecting portion that collects exhaust gases that have flowed into the plurality of first inflow ports, and a first exhaust port through which exhaust gases collected by the first collecting portion are discharged. The second passage includes a second inflow port into which exhaust gases flow and a second exhaust port through which exhaust gases that have flowed into the second inflow port are discharged. The exhaust pipe includes a connection passage through which the first exhaust port and the second inflow port are connected together. | 05-23-2013 |
| 20130130577 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 05-23-2013 |
| 20140106633 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage member, and an idle exhaust passage member. The exhaust passage member defines a main exhaust passage through which exhaust gases of the engine are guided to a main exhaust port disposed in the water, and also defines a portion of an idle exhaust passage through which exhaust gases in the main exhaust passage are guided to an idle exhaust port opened to the atmosphere. The idle exhaust passage member includes an upstream end connected to the exhaust passage member and a downstream end that defines the idle exhaust port and is disposed at a higher position than the upstream end. The idle exhaust passage member is made of a flexible material, and is integrally formed from the upstream end to the downstream end. | 04-17-2014 |
| 20140378014 | VESSEL - A vessel includes an outboard motor including an upstream exhaust port that emits exhaust, a hull including a rear portion on which the outboard motor is mounted, a cabin disposed above the hull, a downstream exhaust port disposed farther to a lateral side than the outboard motor, and an exhaust passage extending from the upstream exhaust port to the downstream exhaust port and guiding the exhaust from the upstream exhaust port to the downstream exhaust port. The cabin includes a windshield disposed in front of the outboard motor in a plan view. The height of the cabin from a rearmost end of the outboard motor is not less than ½ or about ½ of a horizontal distance in a front/rear direction from a rear end edge of the windshield to the rearmost end of the outboard motor. | 12-25-2014 |
| 20090233501 | EXHAUST SYSTEM FOR SMALL WATERCRAFT - An exhaust system for a small watercraft for effectively reducing exhaust noise and allowing a high output of an engine to be easily obtained at the time of high speed operation. An exhaust outlet of an exhaust pipe extending from an engine provided in a watercraft body is disposed at a position that allows it to sink in the water at the time when a travel speed of the watercraft body is a predetermined speed or less. The exhaust outlet is raised above the water at the time when the travel speed of the watercraft body exceeds the predetermined speed. An open surface of the exhaust outlet is offset toward a side wall surface of a pump chamber from a center of a jet pump in the pump chamber and is made oblique toward the side wall surface toward which the open surface of the exhaust outlet is offset. | 09-17-2009 |
| 20120252288 | METHOD AND SYSTEM FOR CONTROLLING THE EXHAUST GASES FROM AN ENGINE - A method for controlling the exit of exhaust gases from an engine which is used to power an underwater propeller drive arranged at the hull bottom of a boat is provided. According to the method exhaust gases are allowed to flow from the engine through an exhaust channel and exit through a first underwater exhaust outlet in the underwater propeller drive. According to the method, if the engine is running and the transmission of the propeller drive is in neutral position, a second underwater exhaust outlet is opened for letting exhaust gases in the exhaust channel exit in a position closer to the hull bottom of the boat than the first underwater exhaust outlet. | 10-04-2012 |
| 20100261393 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage, an idle exhaust passage, a contraction portion and an expansion chamber, a bypass passage, and a check valve. The bypass passage includes an upstream end connected to the idle exhaust passage at a downstream side relative to the contraction portion and the expansion chamber, and a downstream end connected to the idle exhaust passage at an upstream side relative to the contraction portion and the expansion chamber. The check valve is provided in the bypass passage. The check valve is arranged such that air flows only from the upstream end side to the downstream end side. | 10-14-2010 |
| 20140024271 | MOTIVE FORCE OR POWER TAKEOFF DEVICE FOR VESSELS ACTUATED BY THE WATER FLOW GENERATED IN A COLLECTOR OR CONDUCTOR INCORPORATED INTO THE HULL - The device provides a motive force by a water collector or conductor ( | 01-23-2014 |
| 20090269999 | Marine Engine Exhaust Silencing System - A silencing system for a marine exhaust system incorporates a single muffler for each engine of the marine vessel. The muffler is provided with two sound dampening chambers interconnected by several exhaust openings between the chambers. A Y-shaped exhaust type system directs exhaust streams from both sides of an engine toward a single exhaust conduit which extends through a transom of the marine vessel. The muffler is provided with a drain opening that allows water to flow out of the first chamber of the muffler in order to maximize the available volume within that chamber for use in sound attenuation. The outlet of the second chamber is provided with a baffle plate that directs the flow of exhaust gas in a forward direction toward the transom of the marine vessel and a deflection surface that directs the exhaust gas to flow in a downward direction toward the surface of the body of water in which the marine vessel is operated. | 10-29-2009 |
| 20140057508 | MARINE PROPULSION SYSTEMS HAVING EXHAUST GAS RELIEF OUTLET - A marine propulsion system is for propelling a marine vessel in water. The system comprises an outboard motor that is coupled to a marine vessel, and that comprises an exhaust gas relief outlet that is located above the water when the outboard motor is at idle speed. A conduit conveys exhaust gas from the exhaust gas relief outlet to a discharge outlet located on the marine vessel. | 02-27-2014 |
| 20130149921 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. A stopper is provided at a rear end portion of a gear case of the lower unit, and a bush is inserted into and attached to an inner surface of the stopper. An inside diameter of the bush is set to substantially the same diameter as an outside diameter of a front end portion of the propeller boss, and the bush and the propeller boss are disposed by being overlapped with each other in an axial direction. | 06-13-2013 |
| 20130178121 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. An outside diameter of a front end portion of the propeller boss is set to be equal to or larger than an outside diameter of a rear end portion of a gear case in the lower unit. | 07-11-2013 |
| 20100003873 | OUTBOARD MOTOR - An outboard motor includes an engine and an exhaust pipe. The engine has a crank case, a cylinder body, and a cylinder head aligned along the front-rear direction of the outboard motor, and arranged to support a crankshaft so as to extend along an up-down direction. The exhaust pipe is arranged to lead an exhaust gas of the engine to a main exhaust passage positioned below the engine. The cylinder head has an exhaust gas outlet opened in the side portion on one side of the cylinder head in the left-right direction of the outboard motor. The exhaust pipe has a bypass exhaust pipe which, in a plan view, extends from the exhaust gas outlet, bypasses the engine along the crank case, and reaches the other side in the left-right direction of the engine. | 01-07-2010 |
| 20100022148 | EXHAUST DEVICE FOR OUTBOARD MOTOR MULTI-CYLINDER ENGINE - An exhaust device for an outboard motor multi-cylinder engine includes an exhaust passage having a first end connected to the multi-cylinder engine, a catalyst provided in the exhaust passage, and an exhaust chamber connected to a second end of the exhaust passage as well as to a main exhaust passage positioned below the engine. The exhaust passage includes upstream portions for cylinders which have inlet ends respectively connected to exhaust gas outlets of a plurality of cylinders whose exhaust valve opening periods are different, a collecting portion arranged to connect the outlet ends of these upstream portions to each other, and a plurality of downstream portions which are branched from the collecting portion and connected commonly to the exhaust chamber. The catalyst is provided in each of the plurality of downstream portions. | 01-28-2010 |
| 20100056001 | EXHAUST DEVICE FOR OUTBOARD MOTOR ENGINE AND OUTBOARD MOTOR - An exhaust device for an outboard motor engine includes an exhaust passage, a catalyst an air inlet, and an air pump. The exhaust passage is connected to the engine arranged to support a crankshaft extending along an up-down direction. The catalyst is arranged in the exhaust passage. The air inlet is arranged at a position higher than the engine inside an engine cover covering the engine. The air pump is supported by the engine. Further, the air pump is arranged to supply air taken through the air inlet to an upstream side of the catalyst in the exhaust passage. | 03-04-2010 |
| 20100056002 | OUTBOARD MOTOR - An outboard motor includes an engine, a first exhaust passage, a partition, a communication portion, an exhaust gas concentration sensor, and a catalyst. The engine is arranged to support a crankshaft extending along an up-down direction. The first exhaust passage is connected to the engine and is arranged to exhaust exhaust gas of the engine into water. The partition is arranged to partition an inside of the first exhaust passage into an upstream side and a downstream side. The communication portion is arranged to make the upstream side communicate with the downstream side of the partition in the first exhaust passage. The exhaust gas concentration sensor is arranged on the upstream side of the partition in the first exhaust passage. The catalyst is arranged on an upstream side of the exhaust gas concentration sensor in the first exhaust passage. | 03-04-2010 |
| 20100087108 | Concentricity spacer for a catalyst device of a marine engine - The exhaust system for a marine engine provides a concentricity spacer located between an outer surface of a generally tubular member of a catalyst device and an inner surface of a generally tubular cavity formed within a catalyst housing structure. The concentricity spacer is shaped to allow fluid to pass through the spacer in a direction generally parallel to a central axis of the tubular member. | 04-08-2010 |
| 20100087109 | Marine engine with thermally insulated catalyst structures - A catalyst system for a marine engine supports a catalyst device within a catalyst housing structure in such a way that a space is defined around the device in order to thermally insulate the device from the catalyst housing structure. A rim of the catalyst device cooperates with the housing structure to provide a seal at a bottom portion of the catalyst device to trap water within a reservoir to prevent the water from flowing toward exhaust ports of the engine. The space between the catalyst device and the housing structure provides a thermal insulation which allows the catalyst device to operate at an elevated temperature. | 04-08-2010 |
| 20100112878 | Catalyst device for a marine engine which is generally tubular with a rim portion - A catalyst system for a marine engine incorporates a catalyst device within a housing structure. The catalyst device has a rim portion that is disposed within first and second flange surfaces of first and second housing structures. A gasket is provided which is configured to have an opening that allows the rim portion of the catalyst device to be constrained between the first and second flange portions but not between the gasket and either of the first and second flange surfaces. | 05-06-2010 |
| 20100130079 | Marine engine exhaust system having a plurality of catalyst devices disposed in parallel with each other - A catalyst system for a marine engine includes a plurality of catalyst devices arranged in parallel with each other to accommodate a smaller overall size in a preferred dimension to allow more efficient packaging of the catalyst system. | 05-27-2010 |
| 20100240270 | OUTBOARD MOTOR - An outboard motor includes an engine and a catalyst. The engine includes a cylinder and a cylinder head. The engine includes an exhaust port, a catalyst housing portion, a first exhaust passage, and a passage defining member. The exhaust port is provided in the cylinder head. The catalyst housing portion is provided at a side portion of the cylinder head. The first exhaust passage is arranged to guide exhaust discharged from the exhaust port into an interior of the catalyst housing portion. The passage defining member defines a second exhaust passage. The second exhaust passage is arranged such that exhaust that has passed through the interior of the catalyst housing portion flows into the second exhaust passage. The catalyst is held by the engine in a state in which at least a portion of the catalyst is housed in the interior of the catalyst housing portion. | 09-23-2010 |
| 20110039461 | Exhaust plenum for distributing exhaust gas uniformly through a catalyst module - A plenum is provided upstream from a catalyst module and downstream from a plurality of exhaust ports of a marine engine. The plenum is provided with a cross-sectional area that induces exhaust gas to slow as it passes from the plurality of exhaust ports into the plenum. This slowing of the velocity of exhaust gas improves the probability that the exhaust gas will be more evenly distributed across the inlet surface of the catalyst module. | 02-17-2011 |
| 20110070785 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20110070786 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20130029545 | OUTBOARD MOTOR AND METHOD FOR MANUFACTURING OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust manifold, and a lower exhaust passage. The engine includes a plurality of cylinders, and a plurality of exhaust ports. The cylinders are disposed in-line in a vertical direction. The exhaust ports are respectively connected to the cylinders. The exhaust manifold includes a first passage, a second passage, and a third passage. The first passage is connected to the exhaust ports, and extends in a vertical direction. The second passage is connected to the first passage. The third passage is connected to the first passage below the second passage. The lower exhaust passage is connected to the exhaust manifold, and provides a passage through which exhaust gas is expelled to the outside from the exhaust manifold. One of the second passage and the third passage is connected to the lower exhaust passage. | 01-31-2013 |
| 20140287636 | OUTBOARD MOTOR - An outboard motor includes an exhaust pipe that includes an outer wall section, an inner wall section, a coolant passage, and a constricted section. The inner wall section is arranged inward of the outer wall section. The coolant passage is arranged between the outer wall section and the inner wall section. The constricted section is configured to constrict a flow cross section of the coolant passage. A catalytic converter is housed in the exhaust pipe. A temperature sensor is installed in the constricted section and measures a temperature of a pipe wall of the exhaust pipe. | 09-25-2014 |
| 20140322997 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 10-30-2014 |
| 20100240269 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust guide, and a catalyst. The engine includes a cylinder and crankshaft. The crankshaft is disposed along a vertical direction. The exhaust guide is arranged to support the engine from below. The catalyst is disposed in an interior of the engine. The engine includes a cylinder body. The cylinder body includes a housing portion arranged to house—the catalyst. The cylinder body includes a first exhaust passage that includes an interior of the housing portion. The catalyst is inserted into the housing portion from below and is sandwiched from above and below by the housing portion and the exhaust guide. | 09-23-2010 |
| 20100261392 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull having a sealed engine room, an engine installed in the engine room, a jet propulsion unit arranged to be driven by the engine so as to suck in water from around the hull and jet the water, a saddle type seat disposed above the engine room, a first exhaust pipe, an exhaust pipe cooling unit, and a catalyst unit. The first exhaust pipe is attached to a side of the engine inside the engine room, extends rearward from the side of the engine, and is arranged to guide exhaust gas discharged from the engine. The exhaust pipe cooling unit is arranged to cool the first exhaust pipe. The catalyst unit is connected to the first exhaust pipe, is disposed inside the engine room so as to oppose a rear surface of the engine, and is arranged to promote reaction of components contained in the exhaust gas. | 10-14-2010 |
| 20110223819 | OUTBOARD MOTOR - An outboard motor includes an engine, a housing, a catalyst, and an engine cover. The housing includes a partitioning wall that is arranged to partition an interior of the housing into a first exhaust space connected to exhaust ports of the engine, and a second exhaust space connected to the first exhaust space. The housing is arranged such that the second exhaust space is positioned at the same side as the first exhaust space with respect to a plane that includes central axes of the plurality of the cylinders. The catalyst is positioned at a height such that at least a portion of the catalyst overlaps with the first exhaust space when viewed from a horizontal direction. The catalyst is disposed in the second exhaust space so as to guide the exhaust guided from the first exhaust space to the second exhaust space. | 09-15-2011 |
| 20160129982 | BOAT DRIVE - A boat drive including combustion engine located within the hull and a drive unit located outside the hull. The drive has a propeller shaft and an exhaust system with an exhaust duct and an outlet. The exhaust duct connects the engine to the exhaust outlet for carrying away exhaust gases from the engine and cooling water introduced into the exhaust duct. The exhaust outlet is arranged in the propeller shaft. A first exhaust release opening is arranged in the exhaust duct, between the engine and the exhaust outlet, so that during operation, a first fraction of the exhaust gases and cooling water is discharged through the first exhaust release opening, while a second fraction of the exhaust gases and the cooling water is discharged through the exhaust outlet. A device is provided for adjusting the first fraction that can be discharged through the first exhaust release opening. | 05-12-2016 |
| 20100285707 | OUTBOARD ENGINE UNIT - Exhaust passage system in an outboard engine unit includes: an engine-side exhaust pipe; a downstream exhaust pipe for directing exhaust gas downstream from the engine-side exhaust pipe, a lower end portion of the engine-side exhaust pipe and an upper end portion of the downstream exhaust pipe being positioned in horizontally parallel to each other and horizontally overlap each other so as to provide fluid communication therebetween via a through-hole formed in the overlapping portions of the end portions; and a vertical partition wall provided, in an upper end region of the overlapping portions for hampering back-flows of fluid. | 11-11-2010 |
| 20090047849 | Marine engine exhaust system with cooling arrangement - A marine engine exhaust system is provided. The system includes a first and second manifold. A first conduit is in fluid communication with the first manifold so that a first gas is transferred into a first gas passageway of the first conduit. The first conduit has a first cooling fluid passageway. A second conduit is in fluid communication with the second manifold so that a second gas exiting the second manifold is transferred into a second gas passageway of the second conduit. The second conduit has a second cooling fluid passageway. Cooling fluid is transferred through the first cooling fluid passageway so as to have a direction of flow through the first conduit opposite to the direction of flow of the first gas through the first gas passageway of the first conduit. | 02-19-2009 |
| 20110306254 | WATER JACKETED MARINE EXHAUST COMPONENTS HAVING MULTIPLE STREAM SPRAY RING CONFIGURATIONS - A water jacketed exhaust component includes an exhaust pipe having a radially inwardly tapered tail end, a water jacket disposed in surrounding relation with the exhaust pipe, and a generally V-shaped spray ring. The spray ring includes a first and second set of apertures that create diverging streams of cooling water. A first set of apertures creates an annularly disposed series of streams that are directed downstream and radially inward. These streams are generally directed toward the outer surface of the exhaust pipe structure which extends downstream of the spray ring. A second set of apertures creates an annularly disposed series of streams that are directed downstream and radially outward. These streams are generally directed toward the inner surface of the water jacket structure extending downstream of the spray ring. By providing a water jacketed exhaust component with a spray ring that creates diverging streams of cooling water, the present invention provides a water jacketed marine exhaust component that provides improved exhaust gas cooling over a wider range of engine operating conditions. An alternate embodiment includes a V-shaped spray ring configured to create converging streams of cooling water. | 12-15-2011 |
| 20130203308 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a first exhaust passage including an upward guiding portion that guides exhaust generated by an engine upward, a second exhaust passage disposed at a downstream side relative to the first exhaust passage, and a communication passage communicating the first exhaust passage and the second exhaust passage with each other. The communication passage includes a first upstream end opening at the first exhaust passage and a second downstream end disposed below the first upstream end and opening at the second exhaust passage. Further, the communication passage includes an expanded portion disposed at a height in between the first upstream end and the second downstream end and being more expanded than the first upstream end and the second downstream end. | 08-08-2013 |
| 20130203309 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes an exhaust passage guiding exhaust generated at an engine, a water jacket cooling at least a portion of the exhaust passage, a cooling device supplying water outside the vessel propulsion apparatus to the water jacket, an exhaust sensor detecting a concentration of a component in the exhaust in the exhaust passage, and a non-catalytic porous member disposed in the exhaust passage at an upstream side relative to the exhaust sensor. The non-catalytic porous member is a porous member that does not hold a catalyst. | 08-08-2013 |
| 440089000 | Watertrap | 1 |
| 20080242164 | Marine engine exhaust system - A marine engine exhaust system is provided. One exemplary embodiment of the system includes first and second manifolds. A first gas is transferred through a first conduit from the first manifold and is isolated from cooling water through at least a portion of the first conduit. A second conduit is in fluid communication with the second manifold and allows a second gas to be transferred through that is isolated from cooling water through a portion of its length. The first and second conduits are in fluid communication with a third conduit in which the first and second gases merge. Cooling water is merged with either the first or second gas, or both, in the first and second conduits before the first gas and second gas merge in the third conduit. | 10-02-2008 |
| 20090156071 | ENGINE EXHAUST BYPASS SYSTEM FOR OCEAN VESSEL - A primary exhaust bypass for a water-borne vessel having a seat member and a closure member coupled to the seat member, wherein the seat and closure members are configured to seal against exhaust leakage in the closed position and to allow exhaust leakage in the opened condition, and a locking mechanism, wherein the bypass is configured to open when the vessel lists a predetermined amount. A method of bypassing a blocked primary exhaust system may include establishing a bypass exhaust route, providing a normally-closed bypass mechanism at a distal portion of the bypass exhaust route, and changing the orientation of the bypass mechanism with respect to gravity, which may allow the bypass mechanism to open. | 06-18-2009 |
| 20090197489 | EXHAUST INTAKE BONNET (EIB) FOR MARITIME EMISSIONS CONTROL SYSTEM - An improved Exhaust Intake Bonnet (EIB) for an Advanced Maritime Emissions Control System (AMECS) includes a shroud carried by a rigid upper frame and a lowerable and raisable rigid lower frame. The upper frame includes a peak with a duct for receiving exhaust gasses captured by the shroud and winches for lowering and raising the lower frame. The shroud is expandable when the lower frame is lowered and collapsible when the lower frame is raised and has a cinchable base. The AMECS is joined to a ship by positioning the EIB over a ship's exhaust stack using a deployment arm. The shroud is then lowered over the stack and then cinched around the stack to provide a soft attachment between the EIB and the ship's stack. Later, the steps are reversed to separate the AMECS from the ship. | 08-06-2009 |
| 20090233502 | Friction reducing pollution control system for marine vehicles - An exhaust redirect line in communication with an engine exhaust channel of a marine vehicle receiving exhaust gas. A blower unit in the exhaust redirect line directing the exhaust gas through the exhaust redirect line. A mixing chamber in communication with the exhaust redirect line receiving the engine exhaust gas. An injector unit in communication with the mixing chamber introducing a chemical agent, air and water into the mixing chamber to provide a treated exhaust gas. An output vane disposed on an exterior underside of a hull being in communication with the mixing chamber discharging the treated exhaust gas underneath the hull as a foam, whereby the engine exhaust gas is encapsulated and detoxified by the chemical agent in the foam to prevent the exhaust gas from entering the surrounding water and wherein the foam reduces friction between the hull and the surrounding water to improve engine efficiency. | 09-17-2009 |
| 20090270000 | Exhaust system of a marine vessel - An exhaust system for a marine propulsion device is configured to dispose two exhaust conduits in generally concentric overlapping relation with each other in order to minimize the potential cross sectional area of a leak path in the event that a seal fails. One of the exhaust conduits extends through a transom or other surface of a marine vessel and another exhaust conduit conducts exhaust gas from an engine to the exhaust conduit extending through the surface of the marine vessel. | 10-29-2009 |
| 20100041287 | GASKETED CONNECTION OF MARINE ENGINE EXHAUST OUTLET TO EXHAUST CONDUIT - A connecting flange comprises a generally open ended cylindrical body having an inlet adapted for receiving a gasket for providing a sealing connection with a turbocharger housing, and an outlet for connection to marine exhaust conduit. The connector inlet terminates in an end having a radially flared angularly disposed end wall adapted for mating abutting engagement with a correspondingly angled turbocharger housing end wall. The connector inlet end further includes circumferential axially recessed groove that receives spiral wound gasket in a configuration wherein the gasket forms redundant seals at a plurality of locations. The connector inlet structure cooperates with the turbo charger outlet structure to completely enclose the gasket thereby protecting the gasket from hot corrosive exhaust gases. A V-Band clamp is disposed in covering relation with the connector end wall and abutting turbocharger housing component to secure the connector to the turbocharger. | 02-18-2010 |
| 20100041288 | SUBMERGED EXHAUST DISCHARGE FOR MARINE VESSEL - A marine exhaust system adapted for discharging marine exhaust below the water line through at least one streamlined conformal discharge fitting attached to the vessel hull. Each discharge fitting comprises a low profile body attached to the vessel hull in relation with an exhaust discharge conduit terminating in a thru-hull opening so as to discharge marine exhaust into the discharge fitting body. The discharge fitting preferably includes a forward end and an aft end connecting a main discharge fitting body disposed in spaced relation with the underside of the vessel hull. The discharge fitting body defines an exhaust outlet disposed on outboard side thereof so as to allow exhaust gas to exit in an outward and aft flow such that corrosive exhaust gas does not flow over the vessel propellers. Forward and aft baffles are disposed within the discharge fitting body to direct and re-direct exhaust gas flow. By maintaining a streamlined and low-profile/conformal shape, reduction in overall hull hydrodynamics due to increased drag is minimized. | 02-18-2010 |
| 20100285708 | OUTBOARD ENGINE UNIT - Outboard engine unit includes: an anti-splash plate and an anti-cavitation plate provided on a gear case at a vertical interval from each other and extending horizontally from the gear case; an exhaust port provided in a side surface of the gear case for discharging exhaust gas from an engine; and a protruding section provided on the side surface of the gear case at a position located rearwardly of the exhaust port, the protruding section protruding laterally outwardly from the side surface for changing a direction of water flows flowing along the side surface. | 11-11-2010 |
| 20120083176 | Anti-Ingestion System for a Marine Drive - An anti-ingestion system is provided for a marine drive with a submerged exhaust outlet. An anti-ingestion valve is operated by differential pressure thereacross to a closed condition when the engine is operating in an on state and cooling water is being pumped through a water conduit to an exhaust mixing point, with the anti-ingestion valve blocking passage of cooling water therepast in the noted closed condition. The anti-ingestion valve is operated by differential pressure thereacross to an open condition when the engine is in an off state, and permits passage of air therethrough and communicates atmospheric pressure through the water conduit to the exhaust mixing point to relieve vacuum in the exhaust system. | 04-05-2012 |
| 20130130576 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders, an exhaust manifold, and an exhaust pipe. The exhaust manifold includes a first passage and a second passage. The first passage includes a plurality of first inflow ports into which exhaust gases flow from the plurality of cylinders, a first collecting portion that collects exhaust gases that have flowed into the plurality of first inflow ports, and a first exhaust port through which exhaust gases collected by the first collecting portion are discharged. The second passage includes a second inflow port into which exhaust gases flow and a second exhaust port through which exhaust gases that have flowed into the second inflow port are discharged. The exhaust pipe includes a connection passage through which the first exhaust port and the second inflow port are connected together. | 05-23-2013 |
| 20130130577 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 05-23-2013 |
| 20140106633 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage member, and an idle exhaust passage member. The exhaust passage member defines a main exhaust passage through which exhaust gases of the engine are guided to a main exhaust port disposed in the water, and also defines a portion of an idle exhaust passage through which exhaust gases in the main exhaust passage are guided to an idle exhaust port opened to the atmosphere. The idle exhaust passage member includes an upstream end connected to the exhaust passage member and a downstream end that defines the idle exhaust port and is disposed at a higher position than the upstream end. The idle exhaust passage member is made of a flexible material, and is integrally formed from the upstream end to the downstream end. | 04-17-2014 |
| 20140378014 | VESSEL - A vessel includes an outboard motor including an upstream exhaust port that emits exhaust, a hull including a rear portion on which the outboard motor is mounted, a cabin disposed above the hull, a downstream exhaust port disposed farther to a lateral side than the outboard motor, and an exhaust passage extending from the upstream exhaust port to the downstream exhaust port and guiding the exhaust from the upstream exhaust port to the downstream exhaust port. The cabin includes a windshield disposed in front of the outboard motor in a plan view. The height of the cabin from a rearmost end of the outboard motor is not less than ½ or about ½ of a horizontal distance in a front/rear direction from a rear end edge of the windshield to the rearmost end of the outboard motor. | 12-25-2014 |
| 20090233501 | EXHAUST SYSTEM FOR SMALL WATERCRAFT - An exhaust system for a small watercraft for effectively reducing exhaust noise and allowing a high output of an engine to be easily obtained at the time of high speed operation. An exhaust outlet of an exhaust pipe extending from an engine provided in a watercraft body is disposed at a position that allows it to sink in the water at the time when a travel speed of the watercraft body is a predetermined speed or less. The exhaust outlet is raised above the water at the time when the travel speed of the watercraft body exceeds the predetermined speed. An open surface of the exhaust outlet is offset toward a side wall surface of a pump chamber from a center of a jet pump in the pump chamber and is made oblique toward the side wall surface toward which the open surface of the exhaust outlet is offset. | 09-17-2009 |
| 20120252288 | METHOD AND SYSTEM FOR CONTROLLING THE EXHAUST GASES FROM AN ENGINE - A method for controlling the exit of exhaust gases from an engine which is used to power an underwater propeller drive arranged at the hull bottom of a boat is provided. According to the method exhaust gases are allowed to flow from the engine through an exhaust channel and exit through a first underwater exhaust outlet in the underwater propeller drive. According to the method, if the engine is running and the transmission of the propeller drive is in neutral position, a second underwater exhaust outlet is opened for letting exhaust gases in the exhaust channel exit in a position closer to the hull bottom of the boat than the first underwater exhaust outlet. | 10-04-2012 |
| 20100261393 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage, an idle exhaust passage, a contraction portion and an expansion chamber, a bypass passage, and a check valve. The bypass passage includes an upstream end connected to the idle exhaust passage at a downstream side relative to the contraction portion and the expansion chamber, and a downstream end connected to the idle exhaust passage at an upstream side relative to the contraction portion and the expansion chamber. The check valve is provided in the bypass passage. The check valve is arranged such that air flows only from the upstream end side to the downstream end side. | 10-14-2010 |
| 20140024271 | MOTIVE FORCE OR POWER TAKEOFF DEVICE FOR VESSELS ACTUATED BY THE WATER FLOW GENERATED IN A COLLECTOR OR CONDUCTOR INCORPORATED INTO THE HULL - The device provides a motive force by a water collector or conductor ( | 01-23-2014 |
| 20090269999 | Marine Engine Exhaust Silencing System - A silencing system for a marine exhaust system incorporates a single muffler for each engine of the marine vessel. The muffler is provided with two sound dampening chambers interconnected by several exhaust openings between the chambers. A Y-shaped exhaust type system directs exhaust streams from both sides of an engine toward a single exhaust conduit which extends through a transom of the marine vessel. The muffler is provided with a drain opening that allows water to flow out of the first chamber of the muffler in order to maximize the available volume within that chamber for use in sound attenuation. The outlet of the second chamber is provided with a baffle plate that directs the flow of exhaust gas in a forward direction toward the transom of the marine vessel and a deflection surface that directs the exhaust gas to flow in a downward direction toward the surface of the body of water in which the marine vessel is operated. | 10-29-2009 |
| 20140057508 | MARINE PROPULSION SYSTEMS HAVING EXHAUST GAS RELIEF OUTLET - A marine propulsion system is for propelling a marine vessel in water. The system comprises an outboard motor that is coupled to a marine vessel, and that comprises an exhaust gas relief outlet that is located above the water when the outboard motor is at idle speed. A conduit conveys exhaust gas from the exhaust gas relief outlet to a discharge outlet located on the marine vessel. | 02-27-2014 |
| 20130149921 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. A stopper is provided at a rear end portion of a gear case of the lower unit, and a bush is inserted into and attached to an inner surface of the stopper. An inside diameter of the bush is set to substantially the same diameter as an outside diameter of a front end portion of the propeller boss, and the bush and the propeller boss are disposed by being overlapped with each other in an axial direction. | 06-13-2013 |
| 20130178121 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. An outside diameter of a front end portion of the propeller boss is set to be equal to or larger than an outside diameter of a rear end portion of a gear case in the lower unit. | 07-11-2013 |
| 20100003873 | OUTBOARD MOTOR - An outboard motor includes an engine and an exhaust pipe. The engine has a crank case, a cylinder body, and a cylinder head aligned along the front-rear direction of the outboard motor, and arranged to support a crankshaft so as to extend along an up-down direction. The exhaust pipe is arranged to lead an exhaust gas of the engine to a main exhaust passage positioned below the engine. The cylinder head has an exhaust gas outlet opened in the side portion on one side of the cylinder head in the left-right direction of the outboard motor. The exhaust pipe has a bypass exhaust pipe which, in a plan view, extends from the exhaust gas outlet, bypasses the engine along the crank case, and reaches the other side in the left-right direction of the engine. | 01-07-2010 |
| 20100022148 | EXHAUST DEVICE FOR OUTBOARD MOTOR MULTI-CYLINDER ENGINE - An exhaust device for an outboard motor multi-cylinder engine includes an exhaust passage having a first end connected to the multi-cylinder engine, a catalyst provided in the exhaust passage, and an exhaust chamber connected to a second end of the exhaust passage as well as to a main exhaust passage positioned below the engine. The exhaust passage includes upstream portions for cylinders which have inlet ends respectively connected to exhaust gas outlets of a plurality of cylinders whose exhaust valve opening periods are different, a collecting portion arranged to connect the outlet ends of these upstream portions to each other, and a plurality of downstream portions which are branched from the collecting portion and connected commonly to the exhaust chamber. The catalyst is provided in each of the plurality of downstream portions. | 01-28-2010 |
| 20100056001 | EXHAUST DEVICE FOR OUTBOARD MOTOR ENGINE AND OUTBOARD MOTOR - An exhaust device for an outboard motor engine includes an exhaust passage, a catalyst an air inlet, and an air pump. The exhaust passage is connected to the engine arranged to support a crankshaft extending along an up-down direction. The catalyst is arranged in the exhaust passage. The air inlet is arranged at a position higher than the engine inside an engine cover covering the engine. The air pump is supported by the engine. Further, the air pump is arranged to supply air taken through the air inlet to an upstream side of the catalyst in the exhaust passage. | 03-04-2010 |
| 20100056002 | OUTBOARD MOTOR - An outboard motor includes an engine, a first exhaust passage, a partition, a communication portion, an exhaust gas concentration sensor, and a catalyst. The engine is arranged to support a crankshaft extending along an up-down direction. The first exhaust passage is connected to the engine and is arranged to exhaust exhaust gas of the engine into water. The partition is arranged to partition an inside of the first exhaust passage into an upstream side and a downstream side. The communication portion is arranged to make the upstream side communicate with the downstream side of the partition in the first exhaust passage. The exhaust gas concentration sensor is arranged on the upstream side of the partition in the first exhaust passage. The catalyst is arranged on an upstream side of the exhaust gas concentration sensor in the first exhaust passage. | 03-04-2010 |
| 20100087108 | Concentricity spacer for a catalyst device of a marine engine - The exhaust system for a marine engine provides a concentricity spacer located between an outer surface of a generally tubular member of a catalyst device and an inner surface of a generally tubular cavity formed within a catalyst housing structure. The concentricity spacer is shaped to allow fluid to pass through the spacer in a direction generally parallel to a central axis of the tubular member. | 04-08-2010 |
| 20100087109 | Marine engine with thermally insulated catalyst structures - A catalyst system for a marine engine supports a catalyst device within a catalyst housing structure in such a way that a space is defined around the device in order to thermally insulate the device from the catalyst housing structure. A rim of the catalyst device cooperates with the housing structure to provide a seal at a bottom portion of the catalyst device to trap water within a reservoir to prevent the water from flowing toward exhaust ports of the engine. The space between the catalyst device and the housing structure provides a thermal insulation which allows the catalyst device to operate at an elevated temperature. | 04-08-2010 |
| 20100112878 | Catalyst device for a marine engine which is generally tubular with a rim portion - A catalyst system for a marine engine incorporates a catalyst device within a housing structure. The catalyst device has a rim portion that is disposed within first and second flange surfaces of first and second housing structures. A gasket is provided which is configured to have an opening that allows the rim portion of the catalyst device to be constrained between the first and second flange portions but not between the gasket and either of the first and second flange surfaces. | 05-06-2010 |
| 20100130079 | Marine engine exhaust system having a plurality of catalyst devices disposed in parallel with each other - A catalyst system for a marine engine includes a plurality of catalyst devices arranged in parallel with each other to accommodate a smaller overall size in a preferred dimension to allow more efficient packaging of the catalyst system. | 05-27-2010 |
| 20100240270 | OUTBOARD MOTOR - An outboard motor includes an engine and a catalyst. The engine includes a cylinder and a cylinder head. The engine includes an exhaust port, a catalyst housing portion, a first exhaust passage, and a passage defining member. The exhaust port is provided in the cylinder head. The catalyst housing portion is provided at a side portion of the cylinder head. The first exhaust passage is arranged to guide exhaust discharged from the exhaust port into an interior of the catalyst housing portion. The passage defining member defines a second exhaust passage. The second exhaust passage is arranged such that exhaust that has passed through the interior of the catalyst housing portion flows into the second exhaust passage. The catalyst is held by the engine in a state in which at least a portion of the catalyst is housed in the interior of the catalyst housing portion. | 09-23-2010 |
| 20110039461 | Exhaust plenum for distributing exhaust gas uniformly through a catalyst module - A plenum is provided upstream from a catalyst module and downstream from a plurality of exhaust ports of a marine engine. The plenum is provided with a cross-sectional area that induces exhaust gas to slow as it passes from the plurality of exhaust ports into the plenum. This slowing of the velocity of exhaust gas improves the probability that the exhaust gas will be more evenly distributed across the inlet surface of the catalyst module. | 02-17-2011 |
| 20110070785 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20110070786 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20130029545 | OUTBOARD MOTOR AND METHOD FOR MANUFACTURING OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust manifold, and a lower exhaust passage. The engine includes a plurality of cylinders, and a plurality of exhaust ports. The cylinders are disposed in-line in a vertical direction. The exhaust ports are respectively connected to the cylinders. The exhaust manifold includes a first passage, a second passage, and a third passage. The first passage is connected to the exhaust ports, and extends in a vertical direction. The second passage is connected to the first passage. The third passage is connected to the first passage below the second passage. The lower exhaust passage is connected to the exhaust manifold, and provides a passage through which exhaust gas is expelled to the outside from the exhaust manifold. One of the second passage and the third passage is connected to the lower exhaust passage. | 01-31-2013 |
| 20140287636 | OUTBOARD MOTOR - An outboard motor includes an exhaust pipe that includes an outer wall section, an inner wall section, a coolant passage, and a constricted section. The inner wall section is arranged inward of the outer wall section. The coolant passage is arranged between the outer wall section and the inner wall section. The constricted section is configured to constrict a flow cross section of the coolant passage. A catalytic converter is housed in the exhaust pipe. A temperature sensor is installed in the constricted section and measures a temperature of a pipe wall of the exhaust pipe. | 09-25-2014 |
| 20140322997 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 10-30-2014 |
| 20100240269 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust guide, and a catalyst. The engine includes a cylinder and crankshaft. The crankshaft is disposed along a vertical direction. The exhaust guide is arranged to support the engine from below. The catalyst is disposed in an interior of the engine. The engine includes a cylinder body. The cylinder body includes a housing portion arranged to house—the catalyst. The cylinder body includes a first exhaust passage that includes an interior of the housing portion. The catalyst is inserted into the housing portion from below and is sandwiched from above and below by the housing portion and the exhaust guide. | 09-23-2010 |
| 20100261392 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull having a sealed engine room, an engine installed in the engine room, a jet propulsion unit arranged to be driven by the engine so as to suck in water from around the hull and jet the water, a saddle type seat disposed above the engine room, a first exhaust pipe, an exhaust pipe cooling unit, and a catalyst unit. The first exhaust pipe is attached to a side of the engine inside the engine room, extends rearward from the side of the engine, and is arranged to guide exhaust gas discharged from the engine. The exhaust pipe cooling unit is arranged to cool the first exhaust pipe. The catalyst unit is connected to the first exhaust pipe, is disposed inside the engine room so as to oppose a rear surface of the engine, and is arranged to promote reaction of components contained in the exhaust gas. | 10-14-2010 |
| 20110223819 | OUTBOARD MOTOR - An outboard motor includes an engine, a housing, a catalyst, and an engine cover. The housing includes a partitioning wall that is arranged to partition an interior of the housing into a first exhaust space connected to exhaust ports of the engine, and a second exhaust space connected to the first exhaust space. The housing is arranged such that the second exhaust space is positioned at the same side as the first exhaust space with respect to a plane that includes central axes of the plurality of the cylinders. The catalyst is positioned at a height such that at least a portion of the catalyst overlaps with the first exhaust space when viewed from a horizontal direction. The catalyst is disposed in the second exhaust space so as to guide the exhaust guided from the first exhaust space to the second exhaust space. | 09-15-2011 |
| 20160129982 | BOAT DRIVE - A boat drive including combustion engine located within the hull and a drive unit located outside the hull. The drive has a propeller shaft and an exhaust system with an exhaust duct and an outlet. The exhaust duct connects the engine to the exhaust outlet for carrying away exhaust gases from the engine and cooling water introduced into the exhaust duct. The exhaust outlet is arranged in the propeller shaft. A first exhaust release opening is arranged in the exhaust duct, between the engine and the exhaust outlet, so that during operation, a first fraction of the exhaust gases and cooling water is discharged through the first exhaust release opening, while a second fraction of the exhaust gases and the cooling water is discharged through the exhaust outlet. A device is provided for adjusting the first fraction that can be discharged through the first exhaust release opening. | 05-12-2016 |
| 20100285707 | OUTBOARD ENGINE UNIT - Exhaust passage system in an outboard engine unit includes: an engine-side exhaust pipe; a downstream exhaust pipe for directing exhaust gas downstream from the engine-side exhaust pipe, a lower end portion of the engine-side exhaust pipe and an upper end portion of the downstream exhaust pipe being positioned in horizontally parallel to each other and horizontally overlap each other so as to provide fluid communication therebetween via a through-hole formed in the overlapping portions of the end portions; and a vertical partition wall provided, in an upper end region of the overlapping portions for hampering back-flows of fluid. | 11-11-2010 |
| 20090047849 | Marine engine exhaust system with cooling arrangement - A marine engine exhaust system is provided. The system includes a first and second manifold. A first conduit is in fluid communication with the first manifold so that a first gas is transferred into a first gas passageway of the first conduit. The first conduit has a first cooling fluid passageway. A second conduit is in fluid communication with the second manifold so that a second gas exiting the second manifold is transferred into a second gas passageway of the second conduit. The second conduit has a second cooling fluid passageway. Cooling fluid is transferred through the first cooling fluid passageway so as to have a direction of flow through the first conduit opposite to the direction of flow of the first gas through the first gas passageway of the first conduit. | 02-19-2009 |
| 20110306254 | WATER JACKETED MARINE EXHAUST COMPONENTS HAVING MULTIPLE STREAM SPRAY RING CONFIGURATIONS - A water jacketed exhaust component includes an exhaust pipe having a radially inwardly tapered tail end, a water jacket disposed in surrounding relation with the exhaust pipe, and a generally V-shaped spray ring. The spray ring includes a first and second set of apertures that create diverging streams of cooling water. A first set of apertures creates an annularly disposed series of streams that are directed downstream and radially inward. These streams are generally directed toward the outer surface of the exhaust pipe structure which extends downstream of the spray ring. A second set of apertures creates an annularly disposed series of streams that are directed downstream and radially outward. These streams are generally directed toward the inner surface of the water jacket structure extending downstream of the spray ring. By providing a water jacketed exhaust component with a spray ring that creates diverging streams of cooling water, the present invention provides a water jacketed marine exhaust component that provides improved exhaust gas cooling over a wider range of engine operating conditions. An alternate embodiment includes a V-shaped spray ring configured to create converging streams of cooling water. | 12-15-2011 |
| 20130203308 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a first exhaust passage including an upward guiding portion that guides exhaust generated by an engine upward, a second exhaust passage disposed at a downstream side relative to the first exhaust passage, and a communication passage communicating the first exhaust passage and the second exhaust passage with each other. The communication passage includes a first upstream end opening at the first exhaust passage and a second downstream end disposed below the first upstream end and opening at the second exhaust passage. Further, the communication passage includes an expanded portion disposed at a height in between the first upstream end and the second downstream end and being more expanded than the first upstream end and the second downstream end. | 08-08-2013 |
| 20130203309 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes an exhaust passage guiding exhaust generated at an engine, a water jacket cooling at least a portion of the exhaust passage, a cooling device supplying water outside the vessel propulsion apparatus to the water jacket, an exhaust sensor detecting a concentration of a component in the exhaust in the exhaust passage, and a non-catalytic porous member disposed in the exhaust passage at an upstream side relative to the exhaust sensor. The non-catalytic porous member is a porous member that does not hold a catalyst. | 08-08-2013 |
| 440089000 | High and low speed exhaust pressure relief or outlet location condition responsive | 2 |
| 20080242164 | Marine engine exhaust system - A marine engine exhaust system is provided. One exemplary embodiment of the system includes first and second manifolds. A first gas is transferred through a first conduit from the first manifold and is isolated from cooling water through at least a portion of the first conduit. A second conduit is in fluid communication with the second manifold and allows a second gas to be transferred through that is isolated from cooling water through a portion of its length. The first and second conduits are in fluid communication with a third conduit in which the first and second gases merge. Cooling water is merged with either the first or second gas, or both, in the first and second conduits before the first gas and second gas merge in the third conduit. | 10-02-2008 |
| 20090156071 | ENGINE EXHAUST BYPASS SYSTEM FOR OCEAN VESSEL - A primary exhaust bypass for a water-borne vessel having a seat member and a closure member coupled to the seat member, wherein the seat and closure members are configured to seal against exhaust leakage in the closed position and to allow exhaust leakage in the opened condition, and a locking mechanism, wherein the bypass is configured to open when the vessel lists a predetermined amount. A method of bypassing a blocked primary exhaust system may include establishing a bypass exhaust route, providing a normally-closed bypass mechanism at a distal portion of the bypass exhaust route, and changing the orientation of the bypass mechanism with respect to gravity, which may allow the bypass mechanism to open. | 06-18-2009 |
| 20090197489 | EXHAUST INTAKE BONNET (EIB) FOR MARITIME EMISSIONS CONTROL SYSTEM - An improved Exhaust Intake Bonnet (EIB) for an Advanced Maritime Emissions Control System (AMECS) includes a shroud carried by a rigid upper frame and a lowerable and raisable rigid lower frame. The upper frame includes a peak with a duct for receiving exhaust gasses captured by the shroud and winches for lowering and raising the lower frame. The shroud is expandable when the lower frame is lowered and collapsible when the lower frame is raised and has a cinchable base. The AMECS is joined to a ship by positioning the EIB over a ship's exhaust stack using a deployment arm. The shroud is then lowered over the stack and then cinched around the stack to provide a soft attachment between the EIB and the ship's stack. Later, the steps are reversed to separate the AMECS from the ship. | 08-06-2009 |
| 20090233502 | Friction reducing pollution control system for marine vehicles - An exhaust redirect line in communication with an engine exhaust channel of a marine vehicle receiving exhaust gas. A blower unit in the exhaust redirect line directing the exhaust gas through the exhaust redirect line. A mixing chamber in communication with the exhaust redirect line receiving the engine exhaust gas. An injector unit in communication with the mixing chamber introducing a chemical agent, air and water into the mixing chamber to provide a treated exhaust gas. An output vane disposed on an exterior underside of a hull being in communication with the mixing chamber discharging the treated exhaust gas underneath the hull as a foam, whereby the engine exhaust gas is encapsulated and detoxified by the chemical agent in the foam to prevent the exhaust gas from entering the surrounding water and wherein the foam reduces friction between the hull and the surrounding water to improve engine efficiency. | 09-17-2009 |
| 20090270000 | Exhaust system of a marine vessel - An exhaust system for a marine propulsion device is configured to dispose two exhaust conduits in generally concentric overlapping relation with each other in order to minimize the potential cross sectional area of a leak path in the event that a seal fails. One of the exhaust conduits extends through a transom or other surface of a marine vessel and another exhaust conduit conducts exhaust gas from an engine to the exhaust conduit extending through the surface of the marine vessel. | 10-29-2009 |
| 20100041287 | GASKETED CONNECTION OF MARINE ENGINE EXHAUST OUTLET TO EXHAUST CONDUIT - A connecting flange comprises a generally open ended cylindrical body having an inlet adapted for receiving a gasket for providing a sealing connection with a turbocharger housing, and an outlet for connection to marine exhaust conduit. The connector inlet terminates in an end having a radially flared angularly disposed end wall adapted for mating abutting engagement with a correspondingly angled turbocharger housing end wall. The connector inlet end further includes circumferential axially recessed groove that receives spiral wound gasket in a configuration wherein the gasket forms redundant seals at a plurality of locations. The connector inlet structure cooperates with the turbo charger outlet structure to completely enclose the gasket thereby protecting the gasket from hot corrosive exhaust gases. A V-Band clamp is disposed in covering relation with the connector end wall and abutting turbocharger housing component to secure the connector to the turbocharger. | 02-18-2010 |
| 20100041288 | SUBMERGED EXHAUST DISCHARGE FOR MARINE VESSEL - A marine exhaust system adapted for discharging marine exhaust below the water line through at least one streamlined conformal discharge fitting attached to the vessel hull. Each discharge fitting comprises a low profile body attached to the vessel hull in relation with an exhaust discharge conduit terminating in a thru-hull opening so as to discharge marine exhaust into the discharge fitting body. The discharge fitting preferably includes a forward end and an aft end connecting a main discharge fitting body disposed in spaced relation with the underside of the vessel hull. The discharge fitting body defines an exhaust outlet disposed on outboard side thereof so as to allow exhaust gas to exit in an outward and aft flow such that corrosive exhaust gas does not flow over the vessel propellers. Forward and aft baffles are disposed within the discharge fitting body to direct and re-direct exhaust gas flow. By maintaining a streamlined and low-profile/conformal shape, reduction in overall hull hydrodynamics due to increased drag is minimized. | 02-18-2010 |
| 20100285708 | OUTBOARD ENGINE UNIT - Outboard engine unit includes: an anti-splash plate and an anti-cavitation plate provided on a gear case at a vertical interval from each other and extending horizontally from the gear case; an exhaust port provided in a side surface of the gear case for discharging exhaust gas from an engine; and a protruding section provided on the side surface of the gear case at a position located rearwardly of the exhaust port, the protruding section protruding laterally outwardly from the side surface for changing a direction of water flows flowing along the side surface. | 11-11-2010 |
| 20120083176 | Anti-Ingestion System for a Marine Drive - An anti-ingestion system is provided for a marine drive with a submerged exhaust outlet. An anti-ingestion valve is operated by differential pressure thereacross to a closed condition when the engine is operating in an on state and cooling water is being pumped through a water conduit to an exhaust mixing point, with the anti-ingestion valve blocking passage of cooling water therepast in the noted closed condition. The anti-ingestion valve is operated by differential pressure thereacross to an open condition when the engine is in an off state, and permits passage of air therethrough and communicates atmospheric pressure through the water conduit to the exhaust mixing point to relieve vacuum in the exhaust system. | 04-05-2012 |
| 20130130576 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders, an exhaust manifold, and an exhaust pipe. The exhaust manifold includes a first passage and a second passage. The first passage includes a plurality of first inflow ports into which exhaust gases flow from the plurality of cylinders, a first collecting portion that collects exhaust gases that have flowed into the plurality of first inflow ports, and a first exhaust port through which exhaust gases collected by the first collecting portion are discharged. The second passage includes a second inflow port into which exhaust gases flow and a second exhaust port through which exhaust gases that have flowed into the second inflow port are discharged. The exhaust pipe includes a connection passage through which the first exhaust port and the second inflow port are connected together. | 05-23-2013 |
| 20130130577 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 05-23-2013 |
| 20140106633 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage member, and an idle exhaust passage member. The exhaust passage member defines a main exhaust passage through which exhaust gases of the engine are guided to a main exhaust port disposed in the water, and also defines a portion of an idle exhaust passage through which exhaust gases in the main exhaust passage are guided to an idle exhaust port opened to the atmosphere. The idle exhaust passage member includes an upstream end connected to the exhaust passage member and a downstream end that defines the idle exhaust port and is disposed at a higher position than the upstream end. The idle exhaust passage member is made of a flexible material, and is integrally formed from the upstream end to the downstream end. | 04-17-2014 |
| 20140378014 | VESSEL - A vessel includes an outboard motor including an upstream exhaust port that emits exhaust, a hull including a rear portion on which the outboard motor is mounted, a cabin disposed above the hull, a downstream exhaust port disposed farther to a lateral side than the outboard motor, and an exhaust passage extending from the upstream exhaust port to the downstream exhaust port and guiding the exhaust from the upstream exhaust port to the downstream exhaust port. The cabin includes a windshield disposed in front of the outboard motor in a plan view. The height of the cabin from a rearmost end of the outboard motor is not less than ½ or about ½ of a horizontal distance in a front/rear direction from a rear end edge of the windshield to the rearmost end of the outboard motor. | 12-25-2014 |
| 20090233501 | EXHAUST SYSTEM FOR SMALL WATERCRAFT - An exhaust system for a small watercraft for effectively reducing exhaust noise and allowing a high output of an engine to be easily obtained at the time of high speed operation. An exhaust outlet of an exhaust pipe extending from an engine provided in a watercraft body is disposed at a position that allows it to sink in the water at the time when a travel speed of the watercraft body is a predetermined speed or less. The exhaust outlet is raised above the water at the time when the travel speed of the watercraft body exceeds the predetermined speed. An open surface of the exhaust outlet is offset toward a side wall surface of a pump chamber from a center of a jet pump in the pump chamber and is made oblique toward the side wall surface toward which the open surface of the exhaust outlet is offset. | 09-17-2009 |
| 20120252288 | METHOD AND SYSTEM FOR CONTROLLING THE EXHAUST GASES FROM AN ENGINE - A method for controlling the exit of exhaust gases from an engine which is used to power an underwater propeller drive arranged at the hull bottom of a boat is provided. According to the method exhaust gases are allowed to flow from the engine through an exhaust channel and exit through a first underwater exhaust outlet in the underwater propeller drive. According to the method, if the engine is running and the transmission of the propeller drive is in neutral position, a second underwater exhaust outlet is opened for letting exhaust gases in the exhaust channel exit in a position closer to the hull bottom of the boat than the first underwater exhaust outlet. | 10-04-2012 |
| 20100261393 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage, an idle exhaust passage, a contraction portion and an expansion chamber, a bypass passage, and a check valve. The bypass passage includes an upstream end connected to the idle exhaust passage at a downstream side relative to the contraction portion and the expansion chamber, and a downstream end connected to the idle exhaust passage at an upstream side relative to the contraction portion and the expansion chamber. The check valve is provided in the bypass passage. The check valve is arranged such that air flows only from the upstream end side to the downstream end side. | 10-14-2010 |
| 20140024271 | MOTIVE FORCE OR POWER TAKEOFF DEVICE FOR VESSELS ACTUATED BY THE WATER FLOW GENERATED IN A COLLECTOR OR CONDUCTOR INCORPORATED INTO THE HULL - The device provides a motive force by a water collector or conductor ( | 01-23-2014 |
| 20090269999 | Marine Engine Exhaust Silencing System - A silencing system for a marine exhaust system incorporates a single muffler for each engine of the marine vessel. The muffler is provided with two sound dampening chambers interconnected by several exhaust openings between the chambers. A Y-shaped exhaust type system directs exhaust streams from both sides of an engine toward a single exhaust conduit which extends through a transom of the marine vessel. The muffler is provided with a drain opening that allows water to flow out of the first chamber of the muffler in order to maximize the available volume within that chamber for use in sound attenuation. The outlet of the second chamber is provided with a baffle plate that directs the flow of exhaust gas in a forward direction toward the transom of the marine vessel and a deflection surface that directs the exhaust gas to flow in a downward direction toward the surface of the body of water in which the marine vessel is operated. | 10-29-2009 |
| 20140057508 | MARINE PROPULSION SYSTEMS HAVING EXHAUST GAS RELIEF OUTLET - A marine propulsion system is for propelling a marine vessel in water. The system comprises an outboard motor that is coupled to a marine vessel, and that comprises an exhaust gas relief outlet that is located above the water when the outboard motor is at idle speed. A conduit conveys exhaust gas from the exhaust gas relief outlet to a discharge outlet located on the marine vessel. | 02-27-2014 |
| 20130149921 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. A stopper is provided at a rear end portion of a gear case of the lower unit, and a bush is inserted into and attached to an inner surface of the stopper. An inside diameter of the bush is set to substantially the same diameter as an outside diameter of a front end portion of the propeller boss, and the bush and the propeller boss are disposed by being overlapped with each other in an axial direction. | 06-13-2013 |
| 20130178121 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. An outside diameter of a front end portion of the propeller boss is set to be equal to or larger than an outside diameter of a rear end portion of a gear case in the lower unit. | 07-11-2013 |
| 20100003873 | OUTBOARD MOTOR - An outboard motor includes an engine and an exhaust pipe. The engine has a crank case, a cylinder body, and a cylinder head aligned along the front-rear direction of the outboard motor, and arranged to support a crankshaft so as to extend along an up-down direction. The exhaust pipe is arranged to lead an exhaust gas of the engine to a main exhaust passage positioned below the engine. The cylinder head has an exhaust gas outlet opened in the side portion on one side of the cylinder head in the left-right direction of the outboard motor. The exhaust pipe has a bypass exhaust pipe which, in a plan view, extends from the exhaust gas outlet, bypasses the engine along the crank case, and reaches the other side in the left-right direction of the engine. | 01-07-2010 |
| 20100022148 | EXHAUST DEVICE FOR OUTBOARD MOTOR MULTI-CYLINDER ENGINE - An exhaust device for an outboard motor multi-cylinder engine includes an exhaust passage having a first end connected to the multi-cylinder engine, a catalyst provided in the exhaust passage, and an exhaust chamber connected to a second end of the exhaust passage as well as to a main exhaust passage positioned below the engine. The exhaust passage includes upstream portions for cylinders which have inlet ends respectively connected to exhaust gas outlets of a plurality of cylinders whose exhaust valve opening periods are different, a collecting portion arranged to connect the outlet ends of these upstream portions to each other, and a plurality of downstream portions which are branched from the collecting portion and connected commonly to the exhaust chamber. The catalyst is provided in each of the plurality of downstream portions. | 01-28-2010 |
| 20100056001 | EXHAUST DEVICE FOR OUTBOARD MOTOR ENGINE AND OUTBOARD MOTOR - An exhaust device for an outboard motor engine includes an exhaust passage, a catalyst an air inlet, and an air pump. The exhaust passage is connected to the engine arranged to support a crankshaft extending along an up-down direction. The catalyst is arranged in the exhaust passage. The air inlet is arranged at a position higher than the engine inside an engine cover covering the engine. The air pump is supported by the engine. Further, the air pump is arranged to supply air taken through the air inlet to an upstream side of the catalyst in the exhaust passage. | 03-04-2010 |
| 20100056002 | OUTBOARD MOTOR - An outboard motor includes an engine, a first exhaust passage, a partition, a communication portion, an exhaust gas concentration sensor, and a catalyst. The engine is arranged to support a crankshaft extending along an up-down direction. The first exhaust passage is connected to the engine and is arranged to exhaust exhaust gas of the engine into water. The partition is arranged to partition an inside of the first exhaust passage into an upstream side and a downstream side. The communication portion is arranged to make the upstream side communicate with the downstream side of the partition in the first exhaust passage. The exhaust gas concentration sensor is arranged on the upstream side of the partition in the first exhaust passage. The catalyst is arranged on an upstream side of the exhaust gas concentration sensor in the first exhaust passage. | 03-04-2010 |
| 20100087108 | Concentricity spacer for a catalyst device of a marine engine - The exhaust system for a marine engine provides a concentricity spacer located between an outer surface of a generally tubular member of a catalyst device and an inner surface of a generally tubular cavity formed within a catalyst housing structure. The concentricity spacer is shaped to allow fluid to pass through the spacer in a direction generally parallel to a central axis of the tubular member. | 04-08-2010 |
| 20100087109 | Marine engine with thermally insulated catalyst structures - A catalyst system for a marine engine supports a catalyst device within a catalyst housing structure in such a way that a space is defined around the device in order to thermally insulate the device from the catalyst housing structure. A rim of the catalyst device cooperates with the housing structure to provide a seal at a bottom portion of the catalyst device to trap water within a reservoir to prevent the water from flowing toward exhaust ports of the engine. The space between the catalyst device and the housing structure provides a thermal insulation which allows the catalyst device to operate at an elevated temperature. | 04-08-2010 |
| 20100112878 | Catalyst device for a marine engine which is generally tubular with a rim portion - A catalyst system for a marine engine incorporates a catalyst device within a housing structure. The catalyst device has a rim portion that is disposed within first and second flange surfaces of first and second housing structures. A gasket is provided which is configured to have an opening that allows the rim portion of the catalyst device to be constrained between the first and second flange portions but not between the gasket and either of the first and second flange surfaces. | 05-06-2010 |
| 20100130079 | Marine engine exhaust system having a plurality of catalyst devices disposed in parallel with each other - A catalyst system for a marine engine includes a plurality of catalyst devices arranged in parallel with each other to accommodate a smaller overall size in a preferred dimension to allow more efficient packaging of the catalyst system. | 05-27-2010 |
| 20100240270 | OUTBOARD MOTOR - An outboard motor includes an engine and a catalyst. The engine includes a cylinder and a cylinder head. The engine includes an exhaust port, a catalyst housing portion, a first exhaust passage, and a passage defining member. The exhaust port is provided in the cylinder head. The catalyst housing portion is provided at a side portion of the cylinder head. The first exhaust passage is arranged to guide exhaust discharged from the exhaust port into an interior of the catalyst housing portion. The passage defining member defines a second exhaust passage. The second exhaust passage is arranged such that exhaust that has passed through the interior of the catalyst housing portion flows into the second exhaust passage. The catalyst is held by the engine in a state in which at least a portion of the catalyst is housed in the interior of the catalyst housing portion. | 09-23-2010 |
| 20110039461 | Exhaust plenum for distributing exhaust gas uniformly through a catalyst module - A plenum is provided upstream from a catalyst module and downstream from a plurality of exhaust ports of a marine engine. The plenum is provided with a cross-sectional area that induces exhaust gas to slow as it passes from the plurality of exhaust ports into the plenum. This slowing of the velocity of exhaust gas improves the probability that the exhaust gas will be more evenly distributed across the inlet surface of the catalyst module. | 02-17-2011 |
| 20110070785 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20110070786 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20130029545 | OUTBOARD MOTOR AND METHOD FOR MANUFACTURING OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust manifold, and a lower exhaust passage. The engine includes a plurality of cylinders, and a plurality of exhaust ports. The cylinders are disposed in-line in a vertical direction. The exhaust ports are respectively connected to the cylinders. The exhaust manifold includes a first passage, a second passage, and a third passage. The first passage is connected to the exhaust ports, and extends in a vertical direction. The second passage is connected to the first passage. The third passage is connected to the first passage below the second passage. The lower exhaust passage is connected to the exhaust manifold, and provides a passage through which exhaust gas is expelled to the outside from the exhaust manifold. One of the second passage and the third passage is connected to the lower exhaust passage. | 01-31-2013 |
| 20140287636 | OUTBOARD MOTOR - An outboard motor includes an exhaust pipe that includes an outer wall section, an inner wall section, a coolant passage, and a constricted section. The inner wall section is arranged inward of the outer wall section. The coolant passage is arranged between the outer wall section and the inner wall section. The constricted section is configured to constrict a flow cross section of the coolant passage. A catalytic converter is housed in the exhaust pipe. A temperature sensor is installed in the constricted section and measures a temperature of a pipe wall of the exhaust pipe. | 09-25-2014 |
| 20140322997 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 10-30-2014 |
| 20100240269 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust guide, and a catalyst. The engine includes a cylinder and crankshaft. The crankshaft is disposed along a vertical direction. The exhaust guide is arranged to support the engine from below. The catalyst is disposed in an interior of the engine. The engine includes a cylinder body. The cylinder body includes a housing portion arranged to house—the catalyst. The cylinder body includes a first exhaust passage that includes an interior of the housing portion. The catalyst is inserted into the housing portion from below and is sandwiched from above and below by the housing portion and the exhaust guide. | 09-23-2010 |
| 20100261392 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull having a sealed engine room, an engine installed in the engine room, a jet propulsion unit arranged to be driven by the engine so as to suck in water from around the hull and jet the water, a saddle type seat disposed above the engine room, a first exhaust pipe, an exhaust pipe cooling unit, and a catalyst unit. The first exhaust pipe is attached to a side of the engine inside the engine room, extends rearward from the side of the engine, and is arranged to guide exhaust gas discharged from the engine. The exhaust pipe cooling unit is arranged to cool the first exhaust pipe. The catalyst unit is connected to the first exhaust pipe, is disposed inside the engine room so as to oppose a rear surface of the engine, and is arranged to promote reaction of components contained in the exhaust gas. | 10-14-2010 |
| 20110223819 | OUTBOARD MOTOR - An outboard motor includes an engine, a housing, a catalyst, and an engine cover. The housing includes a partitioning wall that is arranged to partition an interior of the housing into a first exhaust space connected to exhaust ports of the engine, and a second exhaust space connected to the first exhaust space. The housing is arranged such that the second exhaust space is positioned at the same side as the first exhaust space with respect to a plane that includes central axes of the plurality of the cylinders. The catalyst is positioned at a height such that at least a portion of the catalyst overlaps with the first exhaust space when viewed from a horizontal direction. The catalyst is disposed in the second exhaust space so as to guide the exhaust guided from the first exhaust space to the second exhaust space. | 09-15-2011 |
| 20160129982 | BOAT DRIVE - A boat drive including combustion engine located within the hull and a drive unit located outside the hull. The drive has a propeller shaft and an exhaust system with an exhaust duct and an outlet. The exhaust duct connects the engine to the exhaust outlet for carrying away exhaust gases from the engine and cooling water introduced into the exhaust duct. The exhaust outlet is arranged in the propeller shaft. A first exhaust release opening is arranged in the exhaust duct, between the engine and the exhaust outlet, so that during operation, a first fraction of the exhaust gases and cooling water is discharged through the first exhaust release opening, while a second fraction of the exhaust gases and the cooling water is discharged through the exhaust outlet. A device is provided for adjusting the first fraction that can be discharged through the first exhaust release opening. | 05-12-2016 |
| 20100285707 | OUTBOARD ENGINE UNIT - Exhaust passage system in an outboard engine unit includes: an engine-side exhaust pipe; a downstream exhaust pipe for directing exhaust gas downstream from the engine-side exhaust pipe, a lower end portion of the engine-side exhaust pipe and an upper end portion of the downstream exhaust pipe being positioned in horizontally parallel to each other and horizontally overlap each other so as to provide fluid communication therebetween via a through-hole formed in the overlapping portions of the end portions; and a vertical partition wall provided, in an upper end region of the overlapping portions for hampering back-flows of fluid. | 11-11-2010 |
| 20090047849 | Marine engine exhaust system with cooling arrangement - A marine engine exhaust system is provided. The system includes a first and second manifold. A first conduit is in fluid communication with the first manifold so that a first gas is transferred into a first gas passageway of the first conduit. The first conduit has a first cooling fluid passageway. A second conduit is in fluid communication with the second manifold so that a second gas exiting the second manifold is transferred into a second gas passageway of the second conduit. The second conduit has a second cooling fluid passageway. Cooling fluid is transferred through the first cooling fluid passageway so as to have a direction of flow through the first conduit opposite to the direction of flow of the first gas through the first gas passageway of the first conduit. | 02-19-2009 |
| 20110306254 | WATER JACKETED MARINE EXHAUST COMPONENTS HAVING MULTIPLE STREAM SPRAY RING CONFIGURATIONS - A water jacketed exhaust component includes an exhaust pipe having a radially inwardly tapered tail end, a water jacket disposed in surrounding relation with the exhaust pipe, and a generally V-shaped spray ring. The spray ring includes a first and second set of apertures that create diverging streams of cooling water. A first set of apertures creates an annularly disposed series of streams that are directed downstream and radially inward. These streams are generally directed toward the outer surface of the exhaust pipe structure which extends downstream of the spray ring. A second set of apertures creates an annularly disposed series of streams that are directed downstream and radially outward. These streams are generally directed toward the inner surface of the water jacket structure extending downstream of the spray ring. By providing a water jacketed exhaust component with a spray ring that creates diverging streams of cooling water, the present invention provides a water jacketed marine exhaust component that provides improved exhaust gas cooling over a wider range of engine operating conditions. An alternate embodiment includes a V-shaped spray ring configured to create converging streams of cooling water. | 12-15-2011 |
| 20130203308 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a first exhaust passage including an upward guiding portion that guides exhaust generated by an engine upward, a second exhaust passage disposed at a downstream side relative to the first exhaust passage, and a communication passage communicating the first exhaust passage and the second exhaust passage with each other. The communication passage includes a first upstream end opening at the first exhaust passage and a second downstream end disposed below the first upstream end and opening at the second exhaust passage. Further, the communication passage includes an expanded portion disposed at a height in between the first upstream end and the second downstream end and being more expanded than the first upstream end and the second downstream end. | 08-08-2013 |
| 20130203309 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes an exhaust passage guiding exhaust generated at an engine, a water jacket cooling at least a portion of the exhaust passage, a cooling device supplying water outside the vessel propulsion apparatus to the water jacket, an exhaust sensor detecting a concentration of a component in the exhaust in the exhaust passage, and a non-catalytic porous member disposed in the exhaust passage at an upstream side relative to the exhaust sensor. The non-catalytic porous member is a porous member that does not hold a catalyst. | 08-08-2013 |
| 440089000 | Treating exhaust with a catalyst | 15 |
| 20080242164 | Marine engine exhaust system - A marine engine exhaust system is provided. One exemplary embodiment of the system includes first and second manifolds. A first gas is transferred through a first conduit from the first manifold and is isolated from cooling water through at least a portion of the first conduit. A second conduit is in fluid communication with the second manifold and allows a second gas to be transferred through that is isolated from cooling water through a portion of its length. The first and second conduits are in fluid communication with a third conduit in which the first and second gases merge. Cooling water is merged with either the first or second gas, or both, in the first and second conduits before the first gas and second gas merge in the third conduit. | 10-02-2008 |
| 20090156071 | ENGINE EXHAUST BYPASS SYSTEM FOR OCEAN VESSEL - A primary exhaust bypass for a water-borne vessel having a seat member and a closure member coupled to the seat member, wherein the seat and closure members are configured to seal against exhaust leakage in the closed position and to allow exhaust leakage in the opened condition, and a locking mechanism, wherein the bypass is configured to open when the vessel lists a predetermined amount. A method of bypassing a blocked primary exhaust system may include establishing a bypass exhaust route, providing a normally-closed bypass mechanism at a distal portion of the bypass exhaust route, and changing the orientation of the bypass mechanism with respect to gravity, which may allow the bypass mechanism to open. | 06-18-2009 |
| 20090197489 | EXHAUST INTAKE BONNET (EIB) FOR MARITIME EMISSIONS CONTROL SYSTEM - An improved Exhaust Intake Bonnet (EIB) for an Advanced Maritime Emissions Control System (AMECS) includes a shroud carried by a rigid upper frame and a lowerable and raisable rigid lower frame. The upper frame includes a peak with a duct for receiving exhaust gasses captured by the shroud and winches for lowering and raising the lower frame. The shroud is expandable when the lower frame is lowered and collapsible when the lower frame is raised and has a cinchable base. The AMECS is joined to a ship by positioning the EIB over a ship's exhaust stack using a deployment arm. The shroud is then lowered over the stack and then cinched around the stack to provide a soft attachment between the EIB and the ship's stack. Later, the steps are reversed to separate the AMECS from the ship. | 08-06-2009 |
| 20090233502 | Friction reducing pollution control system for marine vehicles - An exhaust redirect line in communication with an engine exhaust channel of a marine vehicle receiving exhaust gas. A blower unit in the exhaust redirect line directing the exhaust gas through the exhaust redirect line. A mixing chamber in communication with the exhaust redirect line receiving the engine exhaust gas. An injector unit in communication with the mixing chamber introducing a chemical agent, air and water into the mixing chamber to provide a treated exhaust gas. An output vane disposed on an exterior underside of a hull being in communication with the mixing chamber discharging the treated exhaust gas underneath the hull as a foam, whereby the engine exhaust gas is encapsulated and detoxified by the chemical agent in the foam to prevent the exhaust gas from entering the surrounding water and wherein the foam reduces friction between the hull and the surrounding water to improve engine efficiency. | 09-17-2009 |
| 20090270000 | Exhaust system of a marine vessel - An exhaust system for a marine propulsion device is configured to dispose two exhaust conduits in generally concentric overlapping relation with each other in order to minimize the potential cross sectional area of a leak path in the event that a seal fails. One of the exhaust conduits extends through a transom or other surface of a marine vessel and another exhaust conduit conducts exhaust gas from an engine to the exhaust conduit extending through the surface of the marine vessel. | 10-29-2009 |
| 20100041287 | GASKETED CONNECTION OF MARINE ENGINE EXHAUST OUTLET TO EXHAUST CONDUIT - A connecting flange comprises a generally open ended cylindrical body having an inlet adapted for receiving a gasket for providing a sealing connection with a turbocharger housing, and an outlet for connection to marine exhaust conduit. The connector inlet terminates in an end having a radially flared angularly disposed end wall adapted for mating abutting engagement with a correspondingly angled turbocharger housing end wall. The connector inlet end further includes circumferential axially recessed groove that receives spiral wound gasket in a configuration wherein the gasket forms redundant seals at a plurality of locations. The connector inlet structure cooperates with the turbo charger outlet structure to completely enclose the gasket thereby protecting the gasket from hot corrosive exhaust gases. A V-Band clamp is disposed in covering relation with the connector end wall and abutting turbocharger housing component to secure the connector to the turbocharger. | 02-18-2010 |
| 20100041288 | SUBMERGED EXHAUST DISCHARGE FOR MARINE VESSEL - A marine exhaust system adapted for discharging marine exhaust below the water line through at least one streamlined conformal discharge fitting attached to the vessel hull. Each discharge fitting comprises a low profile body attached to the vessel hull in relation with an exhaust discharge conduit terminating in a thru-hull opening so as to discharge marine exhaust into the discharge fitting body. The discharge fitting preferably includes a forward end and an aft end connecting a main discharge fitting body disposed in spaced relation with the underside of the vessel hull. The discharge fitting body defines an exhaust outlet disposed on outboard side thereof so as to allow exhaust gas to exit in an outward and aft flow such that corrosive exhaust gas does not flow over the vessel propellers. Forward and aft baffles are disposed within the discharge fitting body to direct and re-direct exhaust gas flow. By maintaining a streamlined and low-profile/conformal shape, reduction in overall hull hydrodynamics due to increased drag is minimized. | 02-18-2010 |
| 20100285708 | OUTBOARD ENGINE UNIT - Outboard engine unit includes: an anti-splash plate and an anti-cavitation plate provided on a gear case at a vertical interval from each other and extending horizontally from the gear case; an exhaust port provided in a side surface of the gear case for discharging exhaust gas from an engine; and a protruding section provided on the side surface of the gear case at a position located rearwardly of the exhaust port, the protruding section protruding laterally outwardly from the side surface for changing a direction of water flows flowing along the side surface. | 11-11-2010 |
| 20120083176 | Anti-Ingestion System for a Marine Drive - An anti-ingestion system is provided for a marine drive with a submerged exhaust outlet. An anti-ingestion valve is operated by differential pressure thereacross to a closed condition when the engine is operating in an on state and cooling water is being pumped through a water conduit to an exhaust mixing point, with the anti-ingestion valve blocking passage of cooling water therepast in the noted closed condition. The anti-ingestion valve is operated by differential pressure thereacross to an open condition when the engine is in an off state, and permits passage of air therethrough and communicates atmospheric pressure through the water conduit to the exhaust mixing point to relieve vacuum in the exhaust system. | 04-05-2012 |
| 20130130576 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders, an exhaust manifold, and an exhaust pipe. The exhaust manifold includes a first passage and a second passage. The first passage includes a plurality of first inflow ports into which exhaust gases flow from the plurality of cylinders, a first collecting portion that collects exhaust gases that have flowed into the plurality of first inflow ports, and a first exhaust port through which exhaust gases collected by the first collecting portion are discharged. The second passage includes a second inflow port into which exhaust gases flow and a second exhaust port through which exhaust gases that have flowed into the second inflow port are discharged. The exhaust pipe includes a connection passage through which the first exhaust port and the second inflow port are connected together. | 05-23-2013 |
| 20130130577 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 05-23-2013 |
| 20140106633 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage member, and an idle exhaust passage member. The exhaust passage member defines a main exhaust passage through which exhaust gases of the engine are guided to a main exhaust port disposed in the water, and also defines a portion of an idle exhaust passage through which exhaust gases in the main exhaust passage are guided to an idle exhaust port opened to the atmosphere. The idle exhaust passage member includes an upstream end connected to the exhaust passage member and a downstream end that defines the idle exhaust port and is disposed at a higher position than the upstream end. The idle exhaust passage member is made of a flexible material, and is integrally formed from the upstream end to the downstream end. | 04-17-2014 |
| 20140378014 | VESSEL - A vessel includes an outboard motor including an upstream exhaust port that emits exhaust, a hull including a rear portion on which the outboard motor is mounted, a cabin disposed above the hull, a downstream exhaust port disposed farther to a lateral side than the outboard motor, and an exhaust passage extending from the upstream exhaust port to the downstream exhaust port and guiding the exhaust from the upstream exhaust port to the downstream exhaust port. The cabin includes a windshield disposed in front of the outboard motor in a plan view. The height of the cabin from a rearmost end of the outboard motor is not less than ½ or about ½ of a horizontal distance in a front/rear direction from a rear end edge of the windshield to the rearmost end of the outboard motor. | 12-25-2014 |
| 20090233501 | EXHAUST SYSTEM FOR SMALL WATERCRAFT - An exhaust system for a small watercraft for effectively reducing exhaust noise and allowing a high output of an engine to be easily obtained at the time of high speed operation. An exhaust outlet of an exhaust pipe extending from an engine provided in a watercraft body is disposed at a position that allows it to sink in the water at the time when a travel speed of the watercraft body is a predetermined speed or less. The exhaust outlet is raised above the water at the time when the travel speed of the watercraft body exceeds the predetermined speed. An open surface of the exhaust outlet is offset toward a side wall surface of a pump chamber from a center of a jet pump in the pump chamber and is made oblique toward the side wall surface toward which the open surface of the exhaust outlet is offset. | 09-17-2009 |
| 20120252288 | METHOD AND SYSTEM FOR CONTROLLING THE EXHAUST GASES FROM AN ENGINE - A method for controlling the exit of exhaust gases from an engine which is used to power an underwater propeller drive arranged at the hull bottom of a boat is provided. According to the method exhaust gases are allowed to flow from the engine through an exhaust channel and exit through a first underwater exhaust outlet in the underwater propeller drive. According to the method, if the engine is running and the transmission of the propeller drive is in neutral position, a second underwater exhaust outlet is opened for letting exhaust gases in the exhaust channel exit in a position closer to the hull bottom of the boat than the first underwater exhaust outlet. | 10-04-2012 |
| 20100261393 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage, an idle exhaust passage, a contraction portion and an expansion chamber, a bypass passage, and a check valve. The bypass passage includes an upstream end connected to the idle exhaust passage at a downstream side relative to the contraction portion and the expansion chamber, and a downstream end connected to the idle exhaust passage at an upstream side relative to the contraction portion and the expansion chamber. The check valve is provided in the bypass passage. The check valve is arranged such that air flows only from the upstream end side to the downstream end side. | 10-14-2010 |
| 20140024271 | MOTIVE FORCE OR POWER TAKEOFF DEVICE FOR VESSELS ACTUATED BY THE WATER FLOW GENERATED IN A COLLECTOR OR CONDUCTOR INCORPORATED INTO THE HULL - The device provides a motive force by a water collector or conductor ( | 01-23-2014 |
| 20090269999 | Marine Engine Exhaust Silencing System - A silencing system for a marine exhaust system incorporates a single muffler for each engine of the marine vessel. The muffler is provided with two sound dampening chambers interconnected by several exhaust openings between the chambers. A Y-shaped exhaust type system directs exhaust streams from both sides of an engine toward a single exhaust conduit which extends through a transom of the marine vessel. The muffler is provided with a drain opening that allows water to flow out of the first chamber of the muffler in order to maximize the available volume within that chamber for use in sound attenuation. The outlet of the second chamber is provided with a baffle plate that directs the flow of exhaust gas in a forward direction toward the transom of the marine vessel and a deflection surface that directs the exhaust gas to flow in a downward direction toward the surface of the body of water in which the marine vessel is operated. | 10-29-2009 |
| 20140057508 | MARINE PROPULSION SYSTEMS HAVING EXHAUST GAS RELIEF OUTLET - A marine propulsion system is for propelling a marine vessel in water. The system comprises an outboard motor that is coupled to a marine vessel, and that comprises an exhaust gas relief outlet that is located above the water when the outboard motor is at idle speed. A conduit conveys exhaust gas from the exhaust gas relief outlet to a discharge outlet located on the marine vessel. | 02-27-2014 |
| 20130149921 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. A stopper is provided at a rear end portion of a gear case of the lower unit, and a bush is inserted into and attached to an inner surface of the stopper. An inside diameter of the bush is set to substantially the same diameter as an outside diameter of a front end portion of the propeller boss, and the bush and the propeller boss are disposed by being overlapped with each other in an axial direction. | 06-13-2013 |
| 20130178121 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. An outside diameter of a front end portion of the propeller boss is set to be equal to or larger than an outside diameter of a rear end portion of a gear case in the lower unit. | 07-11-2013 |
| 20100003873 | OUTBOARD MOTOR - An outboard motor includes an engine and an exhaust pipe. The engine has a crank case, a cylinder body, and a cylinder head aligned along the front-rear direction of the outboard motor, and arranged to support a crankshaft so as to extend along an up-down direction. The exhaust pipe is arranged to lead an exhaust gas of the engine to a main exhaust passage positioned below the engine. The cylinder head has an exhaust gas outlet opened in the side portion on one side of the cylinder head in the left-right direction of the outboard motor. The exhaust pipe has a bypass exhaust pipe which, in a plan view, extends from the exhaust gas outlet, bypasses the engine along the crank case, and reaches the other side in the left-right direction of the engine. | 01-07-2010 |
| 20100022148 | EXHAUST DEVICE FOR OUTBOARD MOTOR MULTI-CYLINDER ENGINE - An exhaust device for an outboard motor multi-cylinder engine includes an exhaust passage having a first end connected to the multi-cylinder engine, a catalyst provided in the exhaust passage, and an exhaust chamber connected to a second end of the exhaust passage as well as to a main exhaust passage positioned below the engine. The exhaust passage includes upstream portions for cylinders which have inlet ends respectively connected to exhaust gas outlets of a plurality of cylinders whose exhaust valve opening periods are different, a collecting portion arranged to connect the outlet ends of these upstream portions to each other, and a plurality of downstream portions which are branched from the collecting portion and connected commonly to the exhaust chamber. The catalyst is provided in each of the plurality of downstream portions. | 01-28-2010 |
| 20100056001 | EXHAUST DEVICE FOR OUTBOARD MOTOR ENGINE AND OUTBOARD MOTOR - An exhaust device for an outboard motor engine includes an exhaust passage, a catalyst an air inlet, and an air pump. The exhaust passage is connected to the engine arranged to support a crankshaft extending along an up-down direction. The catalyst is arranged in the exhaust passage. The air inlet is arranged at a position higher than the engine inside an engine cover covering the engine. The air pump is supported by the engine. Further, the air pump is arranged to supply air taken through the air inlet to an upstream side of the catalyst in the exhaust passage. | 03-04-2010 |
| 20100056002 | OUTBOARD MOTOR - An outboard motor includes an engine, a first exhaust passage, a partition, a communication portion, an exhaust gas concentration sensor, and a catalyst. The engine is arranged to support a crankshaft extending along an up-down direction. The first exhaust passage is connected to the engine and is arranged to exhaust exhaust gas of the engine into water. The partition is arranged to partition an inside of the first exhaust passage into an upstream side and a downstream side. The communication portion is arranged to make the upstream side communicate with the downstream side of the partition in the first exhaust passage. The exhaust gas concentration sensor is arranged on the upstream side of the partition in the first exhaust passage. The catalyst is arranged on an upstream side of the exhaust gas concentration sensor in the first exhaust passage. | 03-04-2010 |
| 20100087108 | Concentricity spacer for a catalyst device of a marine engine - The exhaust system for a marine engine provides a concentricity spacer located between an outer surface of a generally tubular member of a catalyst device and an inner surface of a generally tubular cavity formed within a catalyst housing structure. The concentricity spacer is shaped to allow fluid to pass through the spacer in a direction generally parallel to a central axis of the tubular member. | 04-08-2010 |
| 20100087109 | Marine engine with thermally insulated catalyst structures - A catalyst system for a marine engine supports a catalyst device within a catalyst housing structure in such a way that a space is defined around the device in order to thermally insulate the device from the catalyst housing structure. A rim of the catalyst device cooperates with the housing structure to provide a seal at a bottom portion of the catalyst device to trap water within a reservoir to prevent the water from flowing toward exhaust ports of the engine. The space between the catalyst device and the housing structure provides a thermal insulation which allows the catalyst device to operate at an elevated temperature. | 04-08-2010 |
| 20100112878 | Catalyst device for a marine engine which is generally tubular with a rim portion - A catalyst system for a marine engine incorporates a catalyst device within a housing structure. The catalyst device has a rim portion that is disposed within first and second flange surfaces of first and second housing structures. A gasket is provided which is configured to have an opening that allows the rim portion of the catalyst device to be constrained between the first and second flange portions but not between the gasket and either of the first and second flange surfaces. | 05-06-2010 |
| 20100130079 | Marine engine exhaust system having a plurality of catalyst devices disposed in parallel with each other - A catalyst system for a marine engine includes a plurality of catalyst devices arranged in parallel with each other to accommodate a smaller overall size in a preferred dimension to allow more efficient packaging of the catalyst system. | 05-27-2010 |
| 20100240270 | OUTBOARD MOTOR - An outboard motor includes an engine and a catalyst. The engine includes a cylinder and a cylinder head. The engine includes an exhaust port, a catalyst housing portion, a first exhaust passage, and a passage defining member. The exhaust port is provided in the cylinder head. The catalyst housing portion is provided at a side portion of the cylinder head. The first exhaust passage is arranged to guide exhaust discharged from the exhaust port into an interior of the catalyst housing portion. The passage defining member defines a second exhaust passage. The second exhaust passage is arranged such that exhaust that has passed through the interior of the catalyst housing portion flows into the second exhaust passage. The catalyst is held by the engine in a state in which at least a portion of the catalyst is housed in the interior of the catalyst housing portion. | 09-23-2010 |
| 20110039461 | Exhaust plenum for distributing exhaust gas uniformly through a catalyst module - A plenum is provided upstream from a catalyst module and downstream from a plurality of exhaust ports of a marine engine. The plenum is provided with a cross-sectional area that induces exhaust gas to slow as it passes from the plurality of exhaust ports into the plenum. This slowing of the velocity of exhaust gas improves the probability that the exhaust gas will be more evenly distributed across the inlet surface of the catalyst module. | 02-17-2011 |
| 20110070785 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20110070786 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20130029545 | OUTBOARD MOTOR AND METHOD FOR MANUFACTURING OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust manifold, and a lower exhaust passage. The engine includes a plurality of cylinders, and a plurality of exhaust ports. The cylinders are disposed in-line in a vertical direction. The exhaust ports are respectively connected to the cylinders. The exhaust manifold includes a first passage, a second passage, and a third passage. The first passage is connected to the exhaust ports, and extends in a vertical direction. The second passage is connected to the first passage. The third passage is connected to the first passage below the second passage. The lower exhaust passage is connected to the exhaust manifold, and provides a passage through which exhaust gas is expelled to the outside from the exhaust manifold. One of the second passage and the third passage is connected to the lower exhaust passage. | 01-31-2013 |
| 20140287636 | OUTBOARD MOTOR - An outboard motor includes an exhaust pipe that includes an outer wall section, an inner wall section, a coolant passage, and a constricted section. The inner wall section is arranged inward of the outer wall section. The coolant passage is arranged between the outer wall section and the inner wall section. The constricted section is configured to constrict a flow cross section of the coolant passage. A catalytic converter is housed in the exhaust pipe. A temperature sensor is installed in the constricted section and measures a temperature of a pipe wall of the exhaust pipe. | 09-25-2014 |
| 20140322997 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 10-30-2014 |
| 20100240269 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust guide, and a catalyst. The engine includes a cylinder and crankshaft. The crankshaft is disposed along a vertical direction. The exhaust guide is arranged to support the engine from below. The catalyst is disposed in an interior of the engine. The engine includes a cylinder body. The cylinder body includes a housing portion arranged to house—the catalyst. The cylinder body includes a first exhaust passage that includes an interior of the housing portion. The catalyst is inserted into the housing portion from below and is sandwiched from above and below by the housing portion and the exhaust guide. | 09-23-2010 |
| 20100261392 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull having a sealed engine room, an engine installed in the engine room, a jet propulsion unit arranged to be driven by the engine so as to suck in water from around the hull and jet the water, a saddle type seat disposed above the engine room, a first exhaust pipe, an exhaust pipe cooling unit, and a catalyst unit. The first exhaust pipe is attached to a side of the engine inside the engine room, extends rearward from the side of the engine, and is arranged to guide exhaust gas discharged from the engine. The exhaust pipe cooling unit is arranged to cool the first exhaust pipe. The catalyst unit is connected to the first exhaust pipe, is disposed inside the engine room so as to oppose a rear surface of the engine, and is arranged to promote reaction of components contained in the exhaust gas. | 10-14-2010 |
| 20110223819 | OUTBOARD MOTOR - An outboard motor includes an engine, a housing, a catalyst, and an engine cover. The housing includes a partitioning wall that is arranged to partition an interior of the housing into a first exhaust space connected to exhaust ports of the engine, and a second exhaust space connected to the first exhaust space. The housing is arranged such that the second exhaust space is positioned at the same side as the first exhaust space with respect to a plane that includes central axes of the plurality of the cylinders. The catalyst is positioned at a height such that at least a portion of the catalyst overlaps with the first exhaust space when viewed from a horizontal direction. The catalyst is disposed in the second exhaust space so as to guide the exhaust guided from the first exhaust space to the second exhaust space. | 09-15-2011 |
| 20160129982 | BOAT DRIVE - A boat drive including combustion engine located within the hull and a drive unit located outside the hull. The drive has a propeller shaft and an exhaust system with an exhaust duct and an outlet. The exhaust duct connects the engine to the exhaust outlet for carrying away exhaust gases from the engine and cooling water introduced into the exhaust duct. The exhaust outlet is arranged in the propeller shaft. A first exhaust release opening is arranged in the exhaust duct, between the engine and the exhaust outlet, so that during operation, a first fraction of the exhaust gases and cooling water is discharged through the first exhaust release opening, while a second fraction of the exhaust gases and the cooling water is discharged through the exhaust outlet. A device is provided for adjusting the first fraction that can be discharged through the first exhaust release opening. | 05-12-2016 |
| 20100285707 | OUTBOARD ENGINE UNIT - Exhaust passage system in an outboard engine unit includes: an engine-side exhaust pipe; a downstream exhaust pipe for directing exhaust gas downstream from the engine-side exhaust pipe, a lower end portion of the engine-side exhaust pipe and an upper end portion of the downstream exhaust pipe being positioned in horizontally parallel to each other and horizontally overlap each other so as to provide fluid communication therebetween via a through-hole formed in the overlapping portions of the end portions; and a vertical partition wall provided, in an upper end region of the overlapping portions for hampering back-flows of fluid. | 11-11-2010 |
| 20090047849 | Marine engine exhaust system with cooling arrangement - A marine engine exhaust system is provided. The system includes a first and second manifold. A first conduit is in fluid communication with the first manifold so that a first gas is transferred into a first gas passageway of the first conduit. The first conduit has a first cooling fluid passageway. A second conduit is in fluid communication with the second manifold so that a second gas exiting the second manifold is transferred into a second gas passageway of the second conduit. The second conduit has a second cooling fluid passageway. Cooling fluid is transferred through the first cooling fluid passageway so as to have a direction of flow through the first conduit opposite to the direction of flow of the first gas through the first gas passageway of the first conduit. | 02-19-2009 |
| 20110306254 | WATER JACKETED MARINE EXHAUST COMPONENTS HAVING MULTIPLE STREAM SPRAY RING CONFIGURATIONS - A water jacketed exhaust component includes an exhaust pipe having a radially inwardly tapered tail end, a water jacket disposed in surrounding relation with the exhaust pipe, and a generally V-shaped spray ring. The spray ring includes a first and second set of apertures that create diverging streams of cooling water. A first set of apertures creates an annularly disposed series of streams that are directed downstream and radially inward. These streams are generally directed toward the outer surface of the exhaust pipe structure which extends downstream of the spray ring. A second set of apertures creates an annularly disposed series of streams that are directed downstream and radially outward. These streams are generally directed toward the inner surface of the water jacket structure extending downstream of the spray ring. By providing a water jacketed exhaust component with a spray ring that creates diverging streams of cooling water, the present invention provides a water jacketed marine exhaust component that provides improved exhaust gas cooling over a wider range of engine operating conditions. An alternate embodiment includes a V-shaped spray ring configured to create converging streams of cooling water. | 12-15-2011 |
| 20130203308 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a first exhaust passage including an upward guiding portion that guides exhaust generated by an engine upward, a second exhaust passage disposed at a downstream side relative to the first exhaust passage, and a communication passage communicating the first exhaust passage and the second exhaust passage with each other. The communication passage includes a first upstream end opening at the first exhaust passage and a second downstream end disposed below the first upstream end and opening at the second exhaust passage. Further, the communication passage includes an expanded portion disposed at a height in between the first upstream end and the second downstream end and being more expanded than the first upstream end and the second downstream end. | 08-08-2013 |
| 20130203309 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes an exhaust passage guiding exhaust generated at an engine, a water jacket cooling at least a portion of the exhaust passage, a cooling device supplying water outside the vessel propulsion apparatus to the water jacket, an exhaust sensor detecting a concentration of a component in the exhaust in the exhaust passage, and a non-catalytic porous member disposed in the exhaust passage at an upstream side relative to the exhaust sensor. The non-catalytic porous member is a porous member that does not hold a catalyst. | 08-08-2013 |
| 440089000 | Silencer, expansion chamber, muffler | 2 |
| 20080242164 | Marine engine exhaust system - A marine engine exhaust system is provided. One exemplary embodiment of the system includes first and second manifolds. A first gas is transferred through a first conduit from the first manifold and is isolated from cooling water through at least a portion of the first conduit. A second conduit is in fluid communication with the second manifold and allows a second gas to be transferred through that is isolated from cooling water through a portion of its length. The first and second conduits are in fluid communication with a third conduit in which the first and second gases merge. Cooling water is merged with either the first or second gas, or both, in the first and second conduits before the first gas and second gas merge in the third conduit. | 10-02-2008 |
| 20090156071 | ENGINE EXHAUST BYPASS SYSTEM FOR OCEAN VESSEL - A primary exhaust bypass for a water-borne vessel having a seat member and a closure member coupled to the seat member, wherein the seat and closure members are configured to seal against exhaust leakage in the closed position and to allow exhaust leakage in the opened condition, and a locking mechanism, wherein the bypass is configured to open when the vessel lists a predetermined amount. A method of bypassing a blocked primary exhaust system may include establishing a bypass exhaust route, providing a normally-closed bypass mechanism at a distal portion of the bypass exhaust route, and changing the orientation of the bypass mechanism with respect to gravity, which may allow the bypass mechanism to open. | 06-18-2009 |
| 20090197489 | EXHAUST INTAKE BONNET (EIB) FOR MARITIME EMISSIONS CONTROL SYSTEM - An improved Exhaust Intake Bonnet (EIB) for an Advanced Maritime Emissions Control System (AMECS) includes a shroud carried by a rigid upper frame and a lowerable and raisable rigid lower frame. The upper frame includes a peak with a duct for receiving exhaust gasses captured by the shroud and winches for lowering and raising the lower frame. The shroud is expandable when the lower frame is lowered and collapsible when the lower frame is raised and has a cinchable base. The AMECS is joined to a ship by positioning the EIB over a ship's exhaust stack using a deployment arm. The shroud is then lowered over the stack and then cinched around the stack to provide a soft attachment between the EIB and the ship's stack. Later, the steps are reversed to separate the AMECS from the ship. | 08-06-2009 |
| 20090233502 | Friction reducing pollution control system for marine vehicles - An exhaust redirect line in communication with an engine exhaust channel of a marine vehicle receiving exhaust gas. A blower unit in the exhaust redirect line directing the exhaust gas through the exhaust redirect line. A mixing chamber in communication with the exhaust redirect line receiving the engine exhaust gas. An injector unit in communication with the mixing chamber introducing a chemical agent, air and water into the mixing chamber to provide a treated exhaust gas. An output vane disposed on an exterior underside of a hull being in communication with the mixing chamber discharging the treated exhaust gas underneath the hull as a foam, whereby the engine exhaust gas is encapsulated and detoxified by the chemical agent in the foam to prevent the exhaust gas from entering the surrounding water and wherein the foam reduces friction between the hull and the surrounding water to improve engine efficiency. | 09-17-2009 |
| 20090270000 | Exhaust system of a marine vessel - An exhaust system for a marine propulsion device is configured to dispose two exhaust conduits in generally concentric overlapping relation with each other in order to minimize the potential cross sectional area of a leak path in the event that a seal fails. One of the exhaust conduits extends through a transom or other surface of a marine vessel and another exhaust conduit conducts exhaust gas from an engine to the exhaust conduit extending through the surface of the marine vessel. | 10-29-2009 |
| 20100041287 | GASKETED CONNECTION OF MARINE ENGINE EXHAUST OUTLET TO EXHAUST CONDUIT - A connecting flange comprises a generally open ended cylindrical body having an inlet adapted for receiving a gasket for providing a sealing connection with a turbocharger housing, and an outlet for connection to marine exhaust conduit. The connector inlet terminates in an end having a radially flared angularly disposed end wall adapted for mating abutting engagement with a correspondingly angled turbocharger housing end wall. The connector inlet end further includes circumferential axially recessed groove that receives spiral wound gasket in a configuration wherein the gasket forms redundant seals at a plurality of locations. The connector inlet structure cooperates with the turbo charger outlet structure to completely enclose the gasket thereby protecting the gasket from hot corrosive exhaust gases. A V-Band clamp is disposed in covering relation with the connector end wall and abutting turbocharger housing component to secure the connector to the turbocharger. | 02-18-2010 |
| 20100041288 | SUBMERGED EXHAUST DISCHARGE FOR MARINE VESSEL - A marine exhaust system adapted for discharging marine exhaust below the water line through at least one streamlined conformal discharge fitting attached to the vessel hull. Each discharge fitting comprises a low profile body attached to the vessel hull in relation with an exhaust discharge conduit terminating in a thru-hull opening so as to discharge marine exhaust into the discharge fitting body. The discharge fitting preferably includes a forward end and an aft end connecting a main discharge fitting body disposed in spaced relation with the underside of the vessel hull. The discharge fitting body defines an exhaust outlet disposed on outboard side thereof so as to allow exhaust gas to exit in an outward and aft flow such that corrosive exhaust gas does not flow over the vessel propellers. Forward and aft baffles are disposed within the discharge fitting body to direct and re-direct exhaust gas flow. By maintaining a streamlined and low-profile/conformal shape, reduction in overall hull hydrodynamics due to increased drag is minimized. | 02-18-2010 |
| 20100285708 | OUTBOARD ENGINE UNIT - Outboard engine unit includes: an anti-splash plate and an anti-cavitation plate provided on a gear case at a vertical interval from each other and extending horizontally from the gear case; an exhaust port provided in a side surface of the gear case for discharging exhaust gas from an engine; and a protruding section provided on the side surface of the gear case at a position located rearwardly of the exhaust port, the protruding section protruding laterally outwardly from the side surface for changing a direction of water flows flowing along the side surface. | 11-11-2010 |
| 20120083176 | Anti-Ingestion System for a Marine Drive - An anti-ingestion system is provided for a marine drive with a submerged exhaust outlet. An anti-ingestion valve is operated by differential pressure thereacross to a closed condition when the engine is operating in an on state and cooling water is being pumped through a water conduit to an exhaust mixing point, with the anti-ingestion valve blocking passage of cooling water therepast in the noted closed condition. The anti-ingestion valve is operated by differential pressure thereacross to an open condition when the engine is in an off state, and permits passage of air therethrough and communicates atmospheric pressure through the water conduit to the exhaust mixing point to relieve vacuum in the exhaust system. | 04-05-2012 |
| 20130130576 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders, an exhaust manifold, and an exhaust pipe. The exhaust manifold includes a first passage and a second passage. The first passage includes a plurality of first inflow ports into which exhaust gases flow from the plurality of cylinders, a first collecting portion that collects exhaust gases that have flowed into the plurality of first inflow ports, and a first exhaust port through which exhaust gases collected by the first collecting portion are discharged. The second passage includes a second inflow port into which exhaust gases flow and a second exhaust port through which exhaust gases that have flowed into the second inflow port are discharged. The exhaust pipe includes a connection passage through which the first exhaust port and the second inflow port are connected together. | 05-23-2013 |
| 20130130577 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 05-23-2013 |
| 20140106633 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage member, and an idle exhaust passage member. The exhaust passage member defines a main exhaust passage through which exhaust gases of the engine are guided to a main exhaust port disposed in the water, and also defines a portion of an idle exhaust passage through which exhaust gases in the main exhaust passage are guided to an idle exhaust port opened to the atmosphere. The idle exhaust passage member includes an upstream end connected to the exhaust passage member and a downstream end that defines the idle exhaust port and is disposed at a higher position than the upstream end. The idle exhaust passage member is made of a flexible material, and is integrally formed from the upstream end to the downstream end. | 04-17-2014 |
| 20140378014 | VESSEL - A vessel includes an outboard motor including an upstream exhaust port that emits exhaust, a hull including a rear portion on which the outboard motor is mounted, a cabin disposed above the hull, a downstream exhaust port disposed farther to a lateral side than the outboard motor, and an exhaust passage extending from the upstream exhaust port to the downstream exhaust port and guiding the exhaust from the upstream exhaust port to the downstream exhaust port. The cabin includes a windshield disposed in front of the outboard motor in a plan view. The height of the cabin from a rearmost end of the outboard motor is not less than ½ or about ½ of a horizontal distance in a front/rear direction from a rear end edge of the windshield to the rearmost end of the outboard motor. | 12-25-2014 |
| 20090233501 | EXHAUST SYSTEM FOR SMALL WATERCRAFT - An exhaust system for a small watercraft for effectively reducing exhaust noise and allowing a high output of an engine to be easily obtained at the time of high speed operation. An exhaust outlet of an exhaust pipe extending from an engine provided in a watercraft body is disposed at a position that allows it to sink in the water at the time when a travel speed of the watercraft body is a predetermined speed or less. The exhaust outlet is raised above the water at the time when the travel speed of the watercraft body exceeds the predetermined speed. An open surface of the exhaust outlet is offset toward a side wall surface of a pump chamber from a center of a jet pump in the pump chamber and is made oblique toward the side wall surface toward which the open surface of the exhaust outlet is offset. | 09-17-2009 |
| 20120252288 | METHOD AND SYSTEM FOR CONTROLLING THE EXHAUST GASES FROM AN ENGINE - A method for controlling the exit of exhaust gases from an engine which is used to power an underwater propeller drive arranged at the hull bottom of a boat is provided. According to the method exhaust gases are allowed to flow from the engine through an exhaust channel and exit through a first underwater exhaust outlet in the underwater propeller drive. According to the method, if the engine is running and the transmission of the propeller drive is in neutral position, a second underwater exhaust outlet is opened for letting exhaust gases in the exhaust channel exit in a position closer to the hull bottom of the boat than the first underwater exhaust outlet. | 10-04-2012 |
| 20100261393 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust passage, an idle exhaust passage, a contraction portion and an expansion chamber, a bypass passage, and a check valve. The bypass passage includes an upstream end connected to the idle exhaust passage at a downstream side relative to the contraction portion and the expansion chamber, and a downstream end connected to the idle exhaust passage at an upstream side relative to the contraction portion and the expansion chamber. The check valve is provided in the bypass passage. The check valve is arranged such that air flows only from the upstream end side to the downstream end side. | 10-14-2010 |
| 20140024271 | MOTIVE FORCE OR POWER TAKEOFF DEVICE FOR VESSELS ACTUATED BY THE WATER FLOW GENERATED IN A COLLECTOR OR CONDUCTOR INCORPORATED INTO THE HULL - The device provides a motive force by a water collector or conductor ( | 01-23-2014 |
| 20090269999 | Marine Engine Exhaust Silencing System - A silencing system for a marine exhaust system incorporates a single muffler for each engine of the marine vessel. The muffler is provided with two sound dampening chambers interconnected by several exhaust openings between the chambers. A Y-shaped exhaust type system directs exhaust streams from both sides of an engine toward a single exhaust conduit which extends through a transom of the marine vessel. The muffler is provided with a drain opening that allows water to flow out of the first chamber of the muffler in order to maximize the available volume within that chamber for use in sound attenuation. The outlet of the second chamber is provided with a baffle plate that directs the flow of exhaust gas in a forward direction toward the transom of the marine vessel and a deflection surface that directs the exhaust gas to flow in a downward direction toward the surface of the body of water in which the marine vessel is operated. | 10-29-2009 |
| 20140057508 | MARINE PROPULSION SYSTEMS HAVING EXHAUST GAS RELIEF OUTLET - A marine propulsion system is for propelling a marine vessel in water. The system comprises an outboard motor that is coupled to a marine vessel, and that comprises an exhaust gas relief outlet that is located above the water when the outboard motor is at idle speed. A conduit conveys exhaust gas from the exhaust gas relief outlet to a discharge outlet located on the marine vessel. | 02-27-2014 |
| 20130149921 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. A stopper is provided at a rear end portion of a gear case of the lower unit, and a bush is inserted into and attached to an inner surface of the stopper. An inside diameter of the bush is set to substantially the same diameter as an outside diameter of a front end portion of the propeller boss, and the bush and the propeller boss are disposed by being overlapped with each other in an axial direction. | 06-13-2013 |
| 20130178121 | EXHAUST STRUCTURE OF OUTBOARD MOTOR - Exhaust gas from an engine passes through a lower unit, and passes through a propeller boss coupled to a propeller shaft to be discharged into water. An outside diameter of a front end portion of the propeller boss is set to be equal to or larger than an outside diameter of a rear end portion of a gear case in the lower unit. | 07-11-2013 |
| 20100003873 | OUTBOARD MOTOR - An outboard motor includes an engine and an exhaust pipe. The engine has a crank case, a cylinder body, and a cylinder head aligned along the front-rear direction of the outboard motor, and arranged to support a crankshaft so as to extend along an up-down direction. The exhaust pipe is arranged to lead an exhaust gas of the engine to a main exhaust passage positioned below the engine. The cylinder head has an exhaust gas outlet opened in the side portion on one side of the cylinder head in the left-right direction of the outboard motor. The exhaust pipe has a bypass exhaust pipe which, in a plan view, extends from the exhaust gas outlet, bypasses the engine along the crank case, and reaches the other side in the left-right direction of the engine. | 01-07-2010 |
| 20100022148 | EXHAUST DEVICE FOR OUTBOARD MOTOR MULTI-CYLINDER ENGINE - An exhaust device for an outboard motor multi-cylinder engine includes an exhaust passage having a first end connected to the multi-cylinder engine, a catalyst provided in the exhaust passage, and an exhaust chamber connected to a second end of the exhaust passage as well as to a main exhaust passage positioned below the engine. The exhaust passage includes upstream portions for cylinders which have inlet ends respectively connected to exhaust gas outlets of a plurality of cylinders whose exhaust valve opening periods are different, a collecting portion arranged to connect the outlet ends of these upstream portions to each other, and a plurality of downstream portions which are branched from the collecting portion and connected commonly to the exhaust chamber. The catalyst is provided in each of the plurality of downstream portions. | 01-28-2010 |
| 20100056001 | EXHAUST DEVICE FOR OUTBOARD MOTOR ENGINE AND OUTBOARD MOTOR - An exhaust device for an outboard motor engine includes an exhaust passage, a catalyst an air inlet, and an air pump. The exhaust passage is connected to the engine arranged to support a crankshaft extending along an up-down direction. The catalyst is arranged in the exhaust passage. The air inlet is arranged at a position higher than the engine inside an engine cover covering the engine. The air pump is supported by the engine. Further, the air pump is arranged to supply air taken through the air inlet to an upstream side of the catalyst in the exhaust passage. | 03-04-2010 |
| 20100056002 | OUTBOARD MOTOR - An outboard motor includes an engine, a first exhaust passage, a partition, a communication portion, an exhaust gas concentration sensor, and a catalyst. The engine is arranged to support a crankshaft extending along an up-down direction. The first exhaust passage is connected to the engine and is arranged to exhaust exhaust gas of the engine into water. The partition is arranged to partition an inside of the first exhaust passage into an upstream side and a downstream side. The communication portion is arranged to make the upstream side communicate with the downstream side of the partition in the first exhaust passage. The exhaust gas concentration sensor is arranged on the upstream side of the partition in the first exhaust passage. The catalyst is arranged on an upstream side of the exhaust gas concentration sensor in the first exhaust passage. | 03-04-2010 |
| 20100087108 | Concentricity spacer for a catalyst device of a marine engine - The exhaust system for a marine engine provides a concentricity spacer located between an outer surface of a generally tubular member of a catalyst device and an inner surface of a generally tubular cavity formed within a catalyst housing structure. The concentricity spacer is shaped to allow fluid to pass through the spacer in a direction generally parallel to a central axis of the tubular member. | 04-08-2010 |
| 20100087109 | Marine engine with thermally insulated catalyst structures - A catalyst system for a marine engine supports a catalyst device within a catalyst housing structure in such a way that a space is defined around the device in order to thermally insulate the device from the catalyst housing structure. A rim of the catalyst device cooperates with the housing structure to provide a seal at a bottom portion of the catalyst device to trap water within a reservoir to prevent the water from flowing toward exhaust ports of the engine. The space between the catalyst device and the housing structure provides a thermal insulation which allows the catalyst device to operate at an elevated temperature. | 04-08-2010 |
| 20100112878 | Catalyst device for a marine engine which is generally tubular with a rim portion - A catalyst system for a marine engine incorporates a catalyst device within a housing structure. The catalyst device has a rim portion that is disposed within first and second flange surfaces of first and second housing structures. A gasket is provided which is configured to have an opening that allows the rim portion of the catalyst device to be constrained between the first and second flange portions but not between the gasket and either of the first and second flange surfaces. | 05-06-2010 |
| 20100130079 | Marine engine exhaust system having a plurality of catalyst devices disposed in parallel with each other - A catalyst system for a marine engine includes a plurality of catalyst devices arranged in parallel with each other to accommodate a smaller overall size in a preferred dimension to allow more efficient packaging of the catalyst system. | 05-27-2010 |
| 20100240270 | OUTBOARD MOTOR - An outboard motor includes an engine and a catalyst. The engine includes a cylinder and a cylinder head. The engine includes an exhaust port, a catalyst housing portion, a first exhaust passage, and a passage defining member. The exhaust port is provided in the cylinder head. The catalyst housing portion is provided at a side portion of the cylinder head. The first exhaust passage is arranged to guide exhaust discharged from the exhaust port into an interior of the catalyst housing portion. The passage defining member defines a second exhaust passage. The second exhaust passage is arranged such that exhaust that has passed through the interior of the catalyst housing portion flows into the second exhaust passage. The catalyst is held by the engine in a state in which at least a portion of the catalyst is housed in the interior of the catalyst housing portion. | 09-23-2010 |
| 20110039461 | Exhaust plenum for distributing exhaust gas uniformly through a catalyst module - A plenum is provided upstream from a catalyst module and downstream from a plurality of exhaust ports of a marine engine. The plenum is provided with a cross-sectional area that induces exhaust gas to slow as it passes from the plurality of exhaust ports into the plenum. This slowing of the velocity of exhaust gas improves the probability that the exhaust gas will be more evenly distributed across the inlet surface of the catalyst module. | 02-17-2011 |
| 20110070785 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20110070786 | OUTBOARD MOTOR - An outboard motor includes an engine, and a top cowling and a bottom cowling that are arranged to cover the engine. A flow-joining pipe is connected to each exhaust port of a plurality of cylinders of the engine. A first exhaust pipe, a second exhaust pipe, and a third exhaust pipe are connected to the flow-joining pipe in sequence. The flow-joining pipe and the first exhaust pipe are connected generally at the same height as a bottommost of the cylinders of the engine. The third exhaust pipe is disposed above a topmost of the cylinders of the engine. A catalyst is disposed in a connecting portion between the first exhaust pipe and the second exhaust pipe so as to be housed in an upper end portion of the first exhaust pipe and in a lower end portion of the second exhaust pipe. The outboard motor is thus able to prevent water from adhering to a catalyst while avoiding any increase in size. | 03-24-2011 |
| 20130029545 | OUTBOARD MOTOR AND METHOD FOR MANUFACTURING OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust manifold, and a lower exhaust passage. The engine includes a plurality of cylinders, and a plurality of exhaust ports. The cylinders are disposed in-line in a vertical direction. The exhaust ports are respectively connected to the cylinders. The exhaust manifold includes a first passage, a second passage, and a third passage. The first passage is connected to the exhaust ports, and extends in a vertical direction. The second passage is connected to the first passage. The third passage is connected to the first passage below the second passage. The lower exhaust passage is connected to the exhaust manifold, and provides a passage through which exhaust gas is expelled to the outside from the exhaust manifold. One of the second passage and the third passage is connected to the lower exhaust passage. | 01-31-2013 |
| 20140287636 | OUTBOARD MOTOR - An outboard motor includes an exhaust pipe that includes an outer wall section, an inner wall section, a coolant passage, and a constricted section. The inner wall section is arranged inward of the outer wall section. The coolant passage is arranged between the outer wall section and the inner wall section. The constricted section is configured to constrict a flow cross section of the coolant passage. A catalytic converter is housed in the exhaust pipe. A temperature sensor is installed in the constricted section and measures a temperature of a pipe wall of the exhaust pipe. | 09-25-2014 |
| 20140322997 | ENGINE, OUTBOARD MOTOR, AND WATERCRAFT - An engine includes a cylinder block including a plurality of cylinders disposed along a V-shaped line, a pair of exhaust manifolds disposed inside the V-shaped line, and an exhaust pipe disposed inside the V-shaped line. Each of the pair of exhaust manifolds includes a first passage that includes a plurality of inflow ports into which exhaust gases from the cylinders flow, a collecting portion at which exhaust gases are collected, and an exhaust port from which exhaust gases are discharged. The exhaust pipe includes a connection passage that includes a pair of intermediate inflow ports that are connected to the exhaust ports, at least one intermediate exhaust port from which exhaust gases are discharged. The connection passage is arranged to connect the pair of intermediate inflow ports and the at least one intermediate exhaust port. | 10-30-2014 |
| 20100240269 | OUTBOARD MOTOR - An outboard motor includes an engine, an exhaust guide, and a catalyst. The engine includes a cylinder and crankshaft. The crankshaft is disposed along a vertical direction. The exhaust guide is arranged to support the engine from below. The catalyst is disposed in an interior of the engine. The engine includes a cylinder body. The cylinder body includes a housing portion arranged to house—the catalyst. The cylinder body includes a first exhaust passage that includes an interior of the housing portion. The catalyst is inserted into the housing portion from below and is sandwiched from above and below by the housing portion and the exhaust guide. | 09-23-2010 |
| 20100261392 | WATER JET PROPULSION WATERCRAFT - A water jet propulsion watercraft includes a hull having a sealed engine room, an engine installed in the engine room, a jet propulsion unit arranged to be driven by the engine so as to suck in water from around the hull and jet the water, a saddle type seat disposed above the engine room, a first exhaust pipe, an exhaust pipe cooling unit, and a catalyst unit. The first exhaust pipe is attached to a side of the engine inside the engine room, extends rearward from the side of the engine, and is arranged to guide exhaust gas discharged from the engine. The exhaust pipe cooling unit is arranged to cool the first exhaust pipe. The catalyst unit is connected to the first exhaust pipe, is disposed inside the engine room so as to oppose a rear surface of the engine, and is arranged to promote reaction of components contained in the exhaust gas. | 10-14-2010 |
| 20110223819 | OUTBOARD MOTOR - An outboard motor includes an engine, a housing, a catalyst, and an engine cover. The housing includes a partitioning wall that is arranged to partition an interior of the housing into a first exhaust space connected to exhaust ports of the engine, and a second exhaust space connected to the first exhaust space. The housing is arranged such that the second exhaust space is positioned at the same side as the first exhaust space with respect to a plane that includes central axes of the plurality of the cylinders. The catalyst is positioned at a height such that at least a portion of the catalyst overlaps with the first exhaust space when viewed from a horizontal direction. The catalyst is disposed in the second exhaust space so as to guide the exhaust guided from the first exhaust space to the second exhaust space. | 09-15-2011 |
| 20160129982 | BOAT DRIVE - A boat drive including combustion engine located within the hull and a drive unit located outside the hull. The drive has a propeller shaft and an exhaust system with an exhaust duct and an outlet. The exhaust duct connects the engine to the exhaust outlet for carrying away exhaust gases from the engine and cooling water introduced into the exhaust duct. The exhaust outlet is arranged in the propeller shaft. A first exhaust release opening is arranged in the exhaust duct, between the engine and the exhaust outlet, so that during operation, a first fraction of the exhaust gases and cooling water is discharged through the first exhaust release opening, while a second fraction of the exhaust gases and the cooling water is discharged through the exhaust outlet. A device is provided for adjusting the first fraction that can be discharged through the first exhaust release opening. | 05-12-2016 |
| 20100285707 | OUTBOARD ENGINE UNIT - Exhaust passage system in an outboard engine unit includes: an engine-side exhaust pipe; a downstream exhaust pipe for directing exhaust gas downstream from the engine-side exhaust pipe, a lower end portion of the engine-side exhaust pipe and an upper end portion of the downstream exhaust pipe being positioned in horizontally parallel to each other and horizontally overlap each other so as to provide fluid communication therebetween via a through-hole formed in the overlapping portions of the end portions; and a vertical partition wall provided, in an upper end region of the overlapping portions for hampering back-flows of fluid. | 11-11-2010 |
| 20090047849 | Marine engine exhaust system with cooling arrangement - A marine engine exhaust system is provided. The system includes a first and second manifold. A first conduit is in fluid communication with the first manifold so that a first gas is transferred into a first gas passageway of the first conduit. The first conduit has a first cooling fluid passageway. A second conduit is in fluid communication with the second manifold so that a second gas exiting the second manifold is transferred into a second gas passageway of the second conduit. The second conduit has a second cooling fluid passageway. Cooling fluid is transferred through the first cooling fluid passageway so as to have a direction of flow through the first conduit opposite to the direction of flow of the first gas through the first gas passageway of the first conduit. | 02-19-2009 |
| 20110306254 | WATER JACKETED MARINE EXHAUST COMPONENTS HAVING MULTIPLE STREAM SPRAY RING CONFIGURATIONS - A water jacketed exhaust component includes an exhaust pipe having a radially inwardly tapered tail end, a water jacket disposed in surrounding relation with the exhaust pipe, and a generally V-shaped spray ring. The spray ring includes a first and second set of apertures that create diverging streams of cooling water. A first set of apertures creates an annularly disposed series of streams that are directed downstream and radially inward. These streams are generally directed toward the outer surface of the exhaust pipe structure which extends downstream of the spray ring. A second set of apertures creates an annularly disposed series of streams that are directed downstream and radially outward. These streams are generally directed toward the inner surface of the water jacket structure extending downstream of the spray ring. By providing a water jacketed exhaust component with a spray ring that creates diverging streams of cooling water, the present invention provides a water jacketed marine exhaust component that provides improved exhaust gas cooling over a wider range of engine operating conditions. An alternate embodiment includes a V-shaped spray ring configured to create converging streams of cooling water. | 12-15-2011 |
| 20130203308 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes a first exhaust passage including an upward guiding portion that guides exhaust generated by an engine upward, a second exhaust passage disposed at a downstream side relative to the first exhaust passage, and a communication passage communicating the first exhaust passage and the second exhaust passage with each other. The communication passage includes a first upstream end opening at the first exhaust passage and a second downstream end disposed below the first upstream end and opening at the second exhaust passage. Further, the communication passage includes an expanded portion disposed at a height in between the first upstream end and the second downstream end and being more expanded than the first upstream end and the second downstream end. | 08-08-2013 |
| 20130203309 | VESSEL PROPULSION APPARATUS - A vessel propulsion apparatus includes an exhaust passage guiding exhaust generated at an engine, a water jacket cooling at least a portion of the exhaust passage, a cooling device supplying water outside the vessel propulsion apparatus to the water jacket, an exhaust sensor detecting a concentration of a component in the exhaust in the exhaust passage, and a non-catalytic porous member disposed in the exhaust passage at an upstream side relative to the exhaust sensor. The non-catalytic porous member is a porous member that does not hold a catalyst. | 08-08-2013 |
