| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123000000 |
Rear compression
| 66 |
| 123070000 |
Pump and cylinder adjacent
| 46 |
| 123065000 |
Ports
| 12 |
| 123065000 |
Exhaust ports
| 8 |
| 123068000 |
Pump compression
| 7 |
| 123065000 |
Valves
| 7 |
| 123066000 |
Combined pump and motor cylinder | 3 |
| 20090217891 | RECIPROCATING PISTON MACHINE - A two-stroke engine ( | 09-03-2009 |
| 20100313832 | Low Heat Rejection High Efficiency Engine System - An improved low heat rejection high efficiency engine system for an insulated two stroke internal combustion engine which includes an insulation component provided in association with at least one combustion chamber in order to minimise heat loss during operation, the system having at least one inlet port fluidly connected to a transfer port from a pumping cylinder for inlet of a fresh charge in an induction portion of the operation cycle, the inlet port opened and closed during the operation cycle by an inlet valve, characterized in that the period for which the inlet valve is open during the operation cycle is less than 180° of rotation. | 12-16-2010 |
| 20110100309 | Ultra-efficient hydraulic hybrid drivetrain and method of operation - Ultra efficient hydraulic hybrid drivetrain of vehicle with a single cylinder module of engine, air compressor, hydraulic pump and motor transmit power without crankshaft, pipes and hoses. The engine piston fastened to pump plunger located within rotor comprised two diametrically opposite axial rods associated with the plunger, compressor piston and swash plate. This plate turn and independently shift by digital control changes the engine piston stroke, changes the engine compression ratio for super efficient homogeneous charge compression ignition and either kind of fuel use. The hybrid by hydraulic accumulator provides start, idling and work mode of operation. Compressor's piston diameter greater than engine piston diameter and plunger pumping fluid and simultaneously driving additional plungers enables to provide more than 130 hp per liter engine displacement. Such unique features and energy recuperation enables to achieve 80 mile per gallon for the 1500 kg weight medium car in city conditions. | 05-05-2011 |
| 123065000 |
Port deflectors | 2 |
| 20090013979 | RECIPROCATING ENGINE - A reciprocating engine ( | 01-15-2009 |
| 20090013980 | TWO CYCLE ENGINE - Size reduction and pollution reduction are promoted in a two cycle engine. A two cycle engine includes: a cylinder which contains a piston so as to allow reciprocating movement of the piston; a scavenging gas reserving chamber which covers a lower opening of the cylinder so as to seal the lower opening; an intake portion which is provided in the scavenging gas reserving chamber; a scavenging passage which provides communication between the scavenging gas reserving chamber and the cylinder; a connecting rod which is connected to the piston and passes through the scavenging gas reserving chamber; a crank mechanism which allows linear reciprocating movement of the connecting rod; and a sealing portion which is provided in an insertion hole in the scavenging gas reserving chamber through which the connecting rod passes and which allows linear reciprocating movement of the connecting rod but seals the scavenging gas reserving chamber. The two cycle engine may have a structure in which the intake portion has a structure for drawing outside air into the scavenging gas reserving chamber and in which a spraying mechanism for spraying fuel is provided in the cylinder head. | 01-15-2009 |
| 20090013981 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block includes a scavenging passage, which extends between a combustion chamber and a crankcase chamber to communicate them together and has a scavenging port defined in the cylinder block so as to open at an inner peripheral surface of the cylinder block. An intake passage or exhaust passage, the scavenging passage including the scavenging port and a throughhole defined therebetween are formed by the use of a molding piece movable in a direction towards the fuel intake passage or exhaust passage and the throughhole is closed by a lid. | 01-15-2009 |
| 20090013982 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block for the two-cycle combustion engine includes a scavenging port open at an inner peripheral surface of the cylinder block so as to orient diagonally upwardly relative to a longitudinal axis of a cylinder bore and defined in the cylinder block in communication with a combustion chamber. This scavenging port is formed by cutting with the rotary cutting tool, then rotated about its own longitudinal axis, from an inner peripheral surface of the cylinder block. | 01-15-2009 |
| 20090020107 | Two-Stroke Engine, Especially for Landcraft, Watercraft, or Aircraft Models - Disclosed is a two-stroke engine, especially for landcraft, watercraft, or aircraft models, comprising a piston which can be moved up and down within a bush, defines a combination chamber at the top, and is connected to a crankshaft via a con-rod at the bottom, said crankshaft being rotatably mounted in a crank housing located below the bush. In order to reduce friction of the piston in the bush of such a two-stroke engine, the bottom end of the bush, which adjoins the crank housing is provided with means that increase the temperature-related radial expansion of the bush. | 01-22-2009 |
| 20090064975 | TWO-STROKE COMBUSTION ENGINE - A method for the operation of a combustion engine operating in accordance with a two stroke principle, which comprises alternating power stroke and compression strokes, wherein the combustion engine comprises at least one cylinder ( | 03-12-2009 |
| 20090199828 | Air injection engine - An internal combustion engine of the present invention features separate compression and expansion cycles. The engine includes a separate compressor device which pressurizes air by a ratio greater than 15 to 1, at least one two stroke combustion cylinder and a compressed air conduit for transferring compressed air from the compressor to the at least one combustion cylinder. An air injection valve injects the compressed air into the combustion cylinder during the second half portion of the return stroke of the combustion cylinder. The compressed air is mixed with fuel and combusted for expansion during a power stroke. In this engine compression occurs only to a minor degree in the combustion cylinder. Accordingly, the compression ratio of the present engine may be significantly higher or lower than the volumetric expansion ratio of the combustion cylinder thus resulting in corresponding increases in either power density or thermodynamic efficiency respectively. | 08-13-2009 |
| 20090255519 | SILENCER FOR A MOTOR DEVICE - A silencer for a two-stroke engine includes a first chamber and a second chamber, wherein a flow channel is provided between an outlet of a combustion chamber and the first chamber. A high charge degree of the combustion chamber has a pressure ratio in the region of the outlet which reduces or prevents an escape of fresh gas from the combustion chamber. The flow channel between the outlet and the first chamber is flow-favourably shaped in such a manner that the exhaust gas that flows out of the outlet because of its mass inertia predominantly flows into the first chamber and following charging of the first chamber flows back again and as a result a back pressure is formed in the direction of the combustion chamber. | 10-15-2009 |
| 20090277434 | CONTROL STRATEGY FOR MULTI-STROKE ENGINE SYSTEM - An engine system and a method of operation are described. As one example, the method may include: during a first operating condition, operating a cylinder of the engine in a two stroke cycle to combust a first mixture of air and fuel, and adjusting an opening overlap between an intake poppet valve and an exhaust poppet valve of the cylinder to vary a composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve; and during a second operating condition, operating a cylinder of the engine in a four stroke cycle to combust a second mixture of air and fuel, and adjusting a relative amount of fuel contained in the second mixture of air and fuel to vary the composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve. | 11-12-2009 |
| 20100206278 | POWER CUTTER - A power cutter including a two stroke internal combustion engine mounted within a housing and a carburetor for providing aerated fuel for the engine. The carburetor is capable of operating in at least two modes of operation, a first mode when the engine is cold and a second mode when the engine is hot. A temperature sensor is mounted on the engine and provides an engine controller with a signal which is a function of the temperature of the engine; the carburetor comprising an electrically controlled cold start mechanism which switches the carburetor between its two modes of operation, wherein, when the electronic controller determines that the engine is cold, it provides an electrical signal to the electrically controlled cold start mechanism to cause it to change the mode of operation of the carburetor to its first mode. | 08-19-2010 |
| 20100294254 | Inverted cross-scavenged, two-overhead valve, 2-stroke engine - A two-stroke internal combustion engine which has an Inverted Cross-Scavenged operation forming a 180° air and exhaust gas loop and having two overhead valves [ | 11-25-2010 |
| 20100326411 | TWO STROKE ENGINE WITH REGULAR LUBRICATION SYSTEM - This is a novel two-stroke engine design which achieves the best properties of both the two and the four-stroke types of engine. The design has a simple and effective lubrication system, a clean exhaust system, and an increased power to displacement ratio. | 12-30-2010 |
| 20100326412 | Carburetor and Two-Stroke Engine with a Carburetor - A carburetor has a carburetor housing in which an air passage and a mixture passage are disposed. A barrel valve controls the air passage and the mixture passage. The barrel valve has a mixture passage section and an air passage section formed therein. The air passage in at least one position of the barrel valve is closed off at least partially by the barrel valve. The air passage in the at least one position of the barrel valve in which the air passage is at least partially closed off by the barrel valve is connected by a connection within the barrel valve with the mixture passage. An internal combustion engine equipped with such a carburetor exhibits excellent running behavior. | 12-30-2010 |
| 20110061637 | Fuel System - In various embodiments, a metering apparatus may be associated with an engine. The metering apparatus may include a first passageway for transporting air to a first port of an engine, and a second passageway for transporting gaseous fuel to a second port of the engine. | 03-17-2011 |
| 20110303202 | INTERNAL COMBUSTION ENGINE - An internal combustion engine, having at least one cylinder bank, the or each cylinder bank having two outer high pressure cylinders and a central low pressure cylinder, reciprocating pistons of the cylinders being coupled via connecting rods to a crankshaft, the valves of the cylinders being actuated via camshafts which can be driven from the crankshaft, crossflow channels for exhaust gas formed in the region of the or each cylinder bank between outlet valves of the high pressure cylinders and inlet valves of the respective low pressure cylinder, and each crossflow channel and the respective high pressure cylinder of the or each cylinder bank being designed in such a way that a dimensional ratio of a volume of the crossflow channel in cm | 12-15-2011 |
| 20110315132 | Diesel Engine, Predetermined Breaking Component for Diesel Engine as well as Method for Avoiding Damages to a Diesel Engine - The invention concerns a Diesel engine, in particular a two stroke crosshead large Diesel engine comprising at least one combustion chamber, which is enclosed on multiple sides by a cylinder, and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall for the combustion chamber, wherein the combustion chamber on its outer wall presents a predetermined breaking point. The predetermined breaking point is suited to protect the Diesel engine against possible damages which might be caused by an undesirably high overpressure (py) of gases in the combustion chamber during a malfunction of the Diesel engine, wherein the predetermined breaking point comprises a predetermined breaking pressure (ps) below the overpressure (py) above which damages are expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions. A predetermined breaking component comprising the predetermined breaking point, and a method in which for preventing the damages at least one predetermined breaking component is provided in the outer wall of at least one combustion chamber. | 12-29-2011 |
| 20120180769 | Two-Cycle Engine - A two-cycle engine having a structure in which the shaft center C | 07-19-2012 |
| 20120192840 | LOST-MOTION VARIABLE VALVE ACTUATION SYSTEM WITH VALVE DEACTIVATION - Devices and related methods are disclosed that generally involve the selective deactivation of one or more engine valves. In one embodiment, a split-cycle internal combustion engine is provided in which a high-speed trigger valve is used to fill and drain a hydraulic tappet that forms part of a lost-motion system of an engine valve. A spool valve can be used to selectively disconnect the tappet from the trigger valve, thereby deactivating the associated engine valve (i.e., preventing the engine valve from opening). The devices and methods disclosed herein also have application in conventional internal combustion engines and can be used with inwardly-opening and/or outwardly-opening valves. | 08-02-2012 |
| 20120204848 | CRANKSHAFT FOR A TWO-STROKE ENGINE - A crankshaft has a receiving platform for catching lubricant dropping from a main bearing assembly. The receiving platform has at least one wall disposed thereon. The wall has one point that is the furthest from the rotational axis of the crankshaft. One channel is defined in the platform and has an inlet disposed close to the point of the wall that is furthest from the rotational axis of the crankshaft. The channel has an outlet in the vicinity of a connecting rod bearing assembly, so that lubricant dropped on the receiving platform will flow to the connecting rod bearing assembly. | 08-16-2012 |
| 20120298083 | TWO-STROKE HEAVY FUEL ENGINE - A two-stroke internal combustion engine is provided. The two-stroke engine can be integrated into a variety of devices, including for example unmanned aerial vehicles, and can operate on heavy fuels including JP-5 and JP-8, for example. In some embodiments, engine can include a crankshaft including first and second main shaft portions interconnected by an offset crank web. The offset crank web can include opposing end portions that are offset from each other and define spaced apart centerlines generally perpendicular to and coplanar with the crankshaft centerline. In other embodiments, the engine can provide improvements in engine cooling, engine exhaust, lubrication delivery, engine mounting, engine fuel delivery and propeller attachment, for example. | 11-29-2012 |
| 20130228159 | TWO-STROKE ENGINE HAVING AN INTAKE ARRANGEMENT - A two-stroke engine has an intake arrangement including a carburetor. An intake channel divides into a mixture channel and an air channel. An intermediate flange is mounted between the carburetor and the cylinder. This flange has a carburetor connecting surface, which faces toward the carburetor, and a cylinder connecting surface which faces toward the cylinder. Referred to the flow direction in the intake channel, the air channel divides upstream of the cylinder connecting surface into two branches. The first branch has a first longitudinal center axis and the second branch has a second longitudinal center axis. The intersect points of the center axes with the connecting surfaces are mutually connected via an imaginary connecting line in the carburetor connecting surface or the cylinder connecting surface. The two connecting lines conjointly define an angle β in the carburetor connecting surface with this angle being greater than 0°. | 09-05-2013 |
| 20130239933 | TWO-CYCLE ENGINE - A pair of suction-side scavenging ports introduces a working gas containing fuel into a combustion chamber, and the working gases are caused to collide with each other to thereby form a working gas layer in a state of two vortexes rotating in opposite directions to each other, and a pair of exhaust-side scavenging ports introduces a non-working gas having a lower fuel content rate than the working gas into the combustion chamber, and the non-working gases are caused to collide with each other to thereby form a non-working gas layer in a state of one vortex. | 09-19-2013 |
| 20130327306 | ROTARY SYNCHRONOUS CHARGE TRAPPING - An exemplary two-stroke internal combustion engine can comprise one or more cylinders comprising exhaust ports, one or more pistons configured to cyclically cover and uncover the exhaust ports during reciprocation of the pistons within the cylinders, and one or more rotary exhaust valves associated with each exhaust port. The exhaust valves can be configured to rotate around a valve axis that is substantially parallel to an axis of rotation of a crank shaft of the engine. Each exhaust valve at least partially obstructs the associated exhaust port during a portion of the exhaust valve's rotation about the valve axis while the associated exhaust port is at least partially uncovered by the associated piston, thereby trapping fresh charge within the combustion chamber. | 12-12-2013 |
| 20140000574 | MUFFLER AND ENGINE-DRIVEN WORK MACHINE | 01-02-2014 |
| 20140034033 | Pancake engine with overexpansion - The crankshaft is stopped part way through the upstroke by a rotary start stop mechanism. As the piston nears the end of the compression stroke, vertical ridges on the piston, in conjunction with mating vertical ridges in the cylinder head, effectively partition the combustion chamber into multiple combustion chambers. In a spark ignition engine, this allows the compression ratio of a smaller cylinder. For HCCI (homogenoous charge compression ignition) operation, the partitions can be ignited at varying times, somewhat averaging the pressure rise. Expansion proceeds to BDC, providing overexpansion. The exhaust valve(s) open prior to BDC. The upstroke continues to the crankshaft stopping angle. Purge is by poppet valves with the inlet valves generating a swirl about the cylinder axis. Power is varied by varying the frequency of cycles, not by reducing the power per cycle. | 02-06-2014 |
| 20140209078 | Adjusting of Air-Fuel Ratio of a Two-Stroke Internal Combustion Engine - To meet stringent emission standards and improve performance of two-stroke crankcase-scavenged engines, the muffler ( | 07-31-2014 |
| 20140261347 | INTERNAL COMBUSTION ENGINE AND ASSOCIATED SYSTEMS AND METHODS - An internal combustion engine comprising a combustion chamber having a surrounding sidewall with a piston slideably disposed in the surrounding sidewall. A motion conversion mechanism is connected to the piston via a piston rod, and is operative to convert reciprocating motion of the piston into rotary motion. The motion conversion mechanism comprises a cam drum and at least one roller connected to the piston rod. A piston valve including a valve head and a valve stem extends through the piston. The piston valve is moveable between an open position and a closed position to control fluid movement through the flow passage. The valve head is pivotably connected to the valve stem and the engine includes a linkage connected to the valve head that is operative to pivot the valve head between an intake position and an exhaust position. | 09-18-2014 |
| 20150075506 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a piston that defines a main combustion chamber with a surrounding wall of a cylinder and a cylinder head, a fuel gas injector configured to inject fuel gas, a scavenging port that supplies air into the main combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a precombustion chamber cap that defines a precombustion chamber inside thereof, a fuel injection timing control unit configured to inject the fuel gas into the main combustion chamber and to inject the fuel gas into the main combustion chamber upon the piston being positioned in the vicinity of the top dead center, and an ignition timing control unit configured to ignite a mixed air of the fuel gas and the air inside the precombustion chamber upon the piston being positioned in the vicinity of the top dead center. | 03-19-2015 |
| 20150337793 | COMBUSTION IGNITION SYSTEM - Ignition systems, devices, and methods of using a resistive heating element to initiate combustion in internal combustion engines are disclosed. In one embodiment, an ignition system comprises a conductive member having a portion arranged for positioning within a combustion chamber of an internal combustion engine and comprising at least two high-resistance portions separated by a low-resistance portion, the high-resistance portions arranged to reach a temperature sufficient to cause ignition within the engine. In some instances, a conductive member positioned within a combustion chamber and arranged to ignite an air/fuel mixture comprises an inner portion and an outer portion, the inner portion comprising a heat removing portion arranged to remove heat from the outer portion sufficient to prevent pre-ignition. Other embodiments are disclosed. | 11-26-2015 |
| 20160076441 | COMPACT NON-VIBRATING ENDOTHERMIC ENGINE - The Compact Non Vibrating Endothermic Engine (CoNVEE in the following) is an internal combustion engine with reciprocating motion of the pistons, whose innovative architecture makes it more compact, given the same delivered power, with respect to the current state of the art. This happens both because the CoNVEE core occupies a very reduced volume, and also because it does not require the presence of any additional compensation or damping of mechanical vibrations. In fact all the moving parts of the CoNVEE are already internally compensated: they act in perfect anti-symmetry compensating each inertia force developed, excluding, of course, that of the motor shaft which is indispensable for the generation of the useful mechanical energy. The intrinsic compactness of the CoNVEE is made possible by the new and characteristic mechanism adopted for the motion transfer from the pistons to the motor shaft. The CoNVEE may be conveniently used with any type of propulsion fuel and, particularly, for those applications which require high power density and low vibration in the motor. | 03-17-2016 |
| 20160377035 | Air Cleaner For Stratified Scavenging Two-Stroke Internal Combustion Engine - To improve the effect of preventing contamination of an element in an air cleaner. An air cleaner includes a first inlet ( | 12-29-2016 |
| 20080196701 | Two-Stroke Internal Combustion Engine with Enhanced Scavenging - The engine has at least one cylinder ( | 08-21-2008 |
| 20110197866 | METHOD OF OPERATION OF TWO-STROKE FORCED CYLINDER FILLING ENGINE - The invention relates to propulsion engineering, namely to methods of operation of two-stroke engines. The invention makes it possible to increase the power-to-volume ratio of an engine through better cylinder filling and to improve engine performance through the utilization of combustion product energy, while using parts that are easy to produce from inexpensive and readily available materials. The essence of the invention is that a portion of incoming charge is by-passed from a cylinder, during the filling thereof, to an exhaust manifold after the combustion products so that a part of the exhaust manifold is filled. A portion of the combustion products is returned towards the cylinder cavity by fully closing the exhaust manifold with the aid of a valve member, and an incoming charge is pumped from the exhaust manifold to the cylinder cavity via exhaust members by virtue of combustion product energy when the scavenging ports are already closed. | 08-18-2011 |
| 20150114372 | Structures, functions, and methods regarding internal combustion engines - Improved structures, functions, and methods regarding internal combustion engines (ICE's). ICE embodiments disclosed are divided into three groups, all of which have at least one embodiment structurally possessing at least one actively powered fan cooperating with at least one exhaust manifold. All of said embodiments disclosed at least solve the objective technical problem of reducing emissions in an ICE. Said embodiments include both normally aspirated and forced induction ICE's. Said embodiments are capable of operation in two stroke cycle Homogeneous Charge Compression Ignition (HCCI) mode, two stroke cycle spark ignition mode, two stroke cycle combination spark ignition and HCCI mode, or four stroke cycle spark ignition mode. The technical field respecting all embodiments and or their methodologies relates generally to ICE's. Principal uses of the embodiments include enabling the operation of ICE's in the above said various mode or modes. | 04-30-2015 |
| 20080276919 | Piston, A Ring and a Piston Assembly for a Two Cycle Engine - A piston ring ( | 11-13-2008 |
| 20080283029 | Two-stroke internal combustion engine - Disclosed is a two-stroke internal combustion engine comprising a cylinder ( | 11-20-2008 |
| 20100037876 | Two-stroke internal combustion engine with valves for improved fuel efficiency - A two-stroke cycle internal combustion engine has a cylinder with a cylinder head closing off an end of the cylinder, a crankshaft and a piston connecting with the crankshaft to move the piston in a reciprocating movement within the cylinder. Intake and exhaust valves move into and out of a combustion chamber for openings and closures of the valves. A mixture of fuel and air is forced into the cylinder during an open interval of the intake valve beginning in the middle of the upstroke and terminating in a range of 20-60 degrees before top dead center to improve efficiency and choice of fuel by minimizing compressive forces of the piston during the upstroke. Timing of the closure of the intake valve may be delayed automatically with a reduction in crankshaft angular speed. | 02-18-2010 |
| 20120227716 | TWO-STROKE MOTOR WITH IMPROVED SILENCER AND ADAPTED MOTOR MANAGEMENT - In order to further develop a two-stroke motor with a silencer, whereby the silencer has a silencer inlet to which a flow channel connects, and the flow channel is so flow-beneficially designed between the silencer inlet and the first chamber that due to its mass inertia the exhaust gas flowing into the silencer inlet predominantly flows into the first chamber and after filling the first chamber flows back again thereby forming a counter-pressure in the direction of the combustion chamber, so that the above-described drawbacks are prevented, it is proposed to set the ignition time for igniting a fuel-air mixture present in the combustion chamber at an earlier time before the dead centre of a piston defining the combustion chamber in terms of stroke movement, compared with the ignition time of a two-stroke motor operated with a silencer structurally limited to the second chamber. | 09-13-2012 |
| 20140318515 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - An air-leading type, stratified scavenging two-stroke engine. The engine including a cylinder member and a crankcase joined therewith has an intake passage, an exhaust passage, first and second scavenging passages, a communicating portion and an air passage. The intake passage, the exhaust passage and the air passage are formed in the cylinder member. The first and the second scavenging passages each has a cylinder member-side passage and a crankcase-side passage. The cylinder member-side passages of both of the first and the second scavenging passages communicate with each other via the communicating portion. The air passage is connected to the cylinder member-side passage of the first scavenging passage. In the engine, air for pre-scavenging is introduced from the air passage through a check valve into the cylinder member-side passage of the first scavenging passage, and a part of the introduced air flows into the second scavenging passage through the communicating portion. | 10-30-2014 |
| 20150034060 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE ENGINE - An exhaust valve assembly has a valve actuator, a first valve part (FVP) operatively connected to the actuator, a second valve part (SVP), and at least one auxiliary valve operatively connected to the second valve part. When the actuator is in a first position, the FVP is in a fourth position, the SVP is in a seventh position and the at least one auxiliary valve is in a ninth position. When the actuator is in a second position, the FVP is in a fifth position, the SVP is in the seventh position and the at least one auxiliary valve is in the ninth position. When the actuator is in a third position, the FVP is in a sixth position, the SVP is in an eighth position and the at least one auxiliary valve is in a tenth position. The second position is intermediate the first and third positions. | 02-05-2015 |
| 20160032816 | UNIFLOW TWO-STROKE ENGINE - A uniflow two-stroke engine includes: a cylinder receiving a piston such that the piston can reciprocate therein and defining a combustion chamber above the piston; an exhaust port having one end in communication with an upper end portion of the cylinder; a scavenging port having a scavenging orifice at one end, the scavenging orifice being in communication with a lower part of a side portion of the cylinder such that the scavenging port is selectively brought into communication with and shut off from the combustion chamber by the piston; and an exhaust gas recirculation passage having one end in communication with a part of the side portion of the cylinder above the scavenging port and the other end in communication with the scavenging port such that the exhaust gas recirculation passage is selectively brought into communication with and shut off from the combustion chamber by the piston. | 02-04-2016 |
| 20160177812 | METHOD FOR CONTROLLING A TWO-STROKE INTERNAL COMBUSTION ENGINE | 06-23-2016 |
| 20190145308 | TWO-STROKE INTERNAL COMBUSTION ENGINE | 05-16-2019 |
| 20150047620 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a cylinder, a cylinder head, a piston that defines a combustion chamber with a surrounding wall of the cylinder and the cylinder head, a fuel gas injector, an ignition unit, a scavenging port configured to supply air into the combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a fuel gas injection timing control unit configured to cause the fuel gas injector to inject the fuel gas upon the piston being positioned at 10° to 100° before top dead center in an ascending stroke and to cause the fuel gas injector to inject the fuel gas upon the piston being positioned in vicinity of the top dead center, and an ignition timing control unit configured to ignite the fuel gas inside the combustion chamber upon the piston being positioned in the vicinity of the top dead center. | 02-19-2015 |
| 20090283079 | Air Cleaner For Stratified-Scavenging Two-Stroke Internal Combustion Engine - Object It is intended to prevent intrusion of air-fuel mixture into an air cleaner by blow-back in an air-fuel mixture passage of a stratified-scavenging two-stroke engine. | 11-19-2009 |
| 20110061636 | Two-Stroke Engine - A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air and charge inlet passages are substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially perpendicular to the piston pin. | 03-17-2011 |
| 20090050124 | Two-Cycle Engine - A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved. | 02-26-2009 |
| 20100037874 | TWO-STROKE ENGINE EMISSION CONTROL - A two-stroke internal combustion engine is provided. The engine includes a block defining a crankcase for enclosing a fuel mixture and a cylinder chamber formed at an end of a cylinder bore, an air passage in fluid communication with the cylinder bore, a scavenging transfer passage communicating between the crankcase and the cylinder chamber and having a primary transfer port in communication with a secondary transfer port, the secondary port having a first and a spaced-apart second window with a bridge spanning the space therebetween, and a piston slideably positioned in the cylinder bore and having a channel formed in a periphery of the piston and having a piston opening defined therein for providing selective communication between the crankcase and the transfer passage. | 02-18-2010 |
| 20100037875 | TWO CYCLE ENGINE AND TOOL - The invention provides a two cycle engine which can improve an output by effective scavenging. In a two cycle engine having an exhaust port provided in a side portion of a cylinder, and a scavenge air port provided in the side portion of the cylinder so as to be symmetrical with a plane passing through a center in a cylinder circumference direction of the exhaust port an axis extending to inside of the cylinder, the scavenge air port is structured such that an axis extending to inside of the cylinder from an opening of the scavenge air port in such a direction as to be away from the exhaust port of the cylinder, and is divided in an cylinder axis direction by a dividing portion. | 02-18-2010 |
| 20100288251 | SCAVENGING COVER AND TWO-CYCLE ENGINE - Since a throttle hole for narrowing a scavenging passage is provided on a partition for closing the scavenging passage, the throttle hole of a desired size can be drilled at a desired location on the partition after preparing the scavenging cover having no throttle hole on the partition. Accordingly, the size and location of the throttle hole can be easily changed in conducting a test for finding the most appropriate size and location of the throttle hole, so that the most appropriate size and location of the throttle hole can be easily found. | 11-18-2010 |
| 20110146641 | Internal Combustion Engine - An internal combustion engine has a cylinder with cylinder liner and a reciprocatingly supported piston delimiting a combustion chamber and driving in rotation a crankshaft in a crankcase. A device for supplying fuel and combustion air is provided. At least one transfer passage connects in at least one piston position the crankcase interior with the combustion chamber. The transfer passage has a transfer port that opens into the combustion chamber and an opening that opens into the crankcase. Opening and transfer port are displaced relative to each other in circumferential direction of the cylinder. The cylinder liner has at least one segment of a piston bearing surface and forms at least one wall section of the transfer passage. The cylinder has an upper cylinder segment and a lower cylinder segment that are separately embodied. The cylinder liner is separate from the upper and lower cylinder segments. | 06-23-2011 |
| 20110220074 | STRATIFIED TWO-STROKE ENGINE AND FUEL - Various embodiments include a two-stroke engine and a carburetor for use with gaseous fuel, such as hydrogen, methane, liquid petroleum gas, pure propane, and butane. | 09-15-2011 |
| 20120152216 | TWO-STROKE ENGINE - A two stroke engine comprises a cylinder, in which a combustion chamber bounded by a piston is formed, and an intake passage. A carburetor forms a section of the intake passage, within which a throttle element is mounted pivotably, and at least one main fuel opening and at least one idling fuel opening open into the intake passage, which is divided downstream of the carburetor into an air passage and a mixture passage. The idling fuel opening feeds a secondary passage arranged within the mixture passage. In the idling position, the throttle element may be arranged adjacent to the upstream entry opening in the secondary passage, and the throttle element may have an opening which, in the idling position of the throttle element, is arranged in the region of the entry opening and connects the secondary passage to that region of the intake passage located upstream of the throttle element. | 06-21-2012 |
| 20130228158 | TWO STROKE ENGINE PORTING ARRANGEMENT - A gas transfer port system for a cylinder of a two stroke internal combustion engine; said cylinder provided with a fixed separator plate dividing said cylinder into an upper section and a lower section; a piston in said cylinder reciprocating between said separator plate and a cylinder head; and wherein an annular skirt descending from said separator plate forms at least a portion of an annular well between said skirt and an internal surface of said cylinder; said well sealed at the bottom such that said cylinder is isolated from a crankcase of said engine; said gas transfer port system including at least one long gas transfer port connecting a lower portion of said annular well with a gas transfer port outlet aperture in a wall of said cylinder. | 09-05-2013 |
| 20140216425 | REDUCTION OF RING CLIPPING IN TWO-STROKE CYCLE ENGINES - A port for a cylinder of a two-stroke cycle engine includes at least one generally circumferential array of port openings. Port openings have a shape that reduces ring clipping during engine operation. The port opening shape is defined at a bore surface by opposing top and bottom edges joined by side edges. Each of the top and bottom edges is characterized by rounded corner transitions to the side edges, a rounded peak, and inclined ramp portions extending from the rounded corner transitions to the rounded peak. | 08-07-2014 |
| 20140216426 | TWO-CYCLE ENGINE AND METHOD FOR LUBRICATING TWO-CYCLE ENGINE - The two-cycle engine includes a piston capable of reciprocating along a cylinder, the piston being provided with piston rings; and a lubrication port provided in the cylinder, the lubrication port being used to supply a lubricant to a sliding surface of the cylinder on which the piston rings slide. Inter-ring spaces are provided, each inter-ring space being between adjacent piston rings. In addition, the two-cycle engine includes a controller used to adjust a lubrication period of lubricating from the lubrication port during movement of the piston toward a top dead center thereof, so that a period before an uppermost inter-ring space passing by the lubrication port is excluded from the lubrication period and a period in which at least part of a lowermost inter-ring space faces the lubrication port is included in the lubrication period. | 08-07-2014 |
| 20160097343 | Air Leading-Type Stratified Scavenging Two-Stroke Internal-Combustion Engine - The certainty of supplying air to a scavenging channel through a piston groove is improved. In a cylinder wall | 04-07-2016 |
| 20180023528 | INJECTION SYSTEM FOR TWO-STROKE ENGINES | 01-25-2018 |
| 20110155111 | EXHAUST GAS RECIRCULATION SYSTEM FOR A LOCOMOTIVE TWO-STROKE UNIFLOW SCAVENGED DIESEL ENGINE - A locomotive two-stroke uniflow scavenged diesel engine system including an exhaust gas recirculation (EGR) system is described for reducing NO | 06-30-2011 |
| 20120304972 | TWO-STROKE ENGINE WITH LOW CONSUMPTION AND LOW EMISSIONS - Two-stroke engine ( | 12-06-2012 |
| 20130247885 | TWO-STROKE ENGINE AND FOUR-STROKE ENGINE - A two-stroke engine ( | 09-26-2013 |
| 20080223349 | Stratified scavenging two-stoke cycle engine - A stratified scavenging two-stroke cycle engine with the check valve for introducing scavenging air simplified in construction is provided. The gasket between the flange part forming an air supply chamber and a mixture passage at a side of the cylinder and the passage connecting member having an air flow passage and a mixture flow passage is composed to have an integral leaf valve for allowing air in the air flow passage in the passage connecting member to flow only toward the air supply chamber which is connected to the scavenging passages of the engine so that the gasket has a function as a seal member and that as a check valve. | 09-18-2008 |
| 20100192928 | TWO-STROKE CYCLE COMBUSTION ENGINE OF AIR SCAVENGING TYPE - To provide a two-stroke cycle combustion engine of an air scavenging type, in which not only can transit from the idling condition to the rapid accelerating condition take place smoothly, but the combustion engine can be smoothly started, there are provided scavenging passages ( | 08-05-2010 |
| 20100206279 | METHOD AND APPARATUS FOR OPTIMIZATION OF OPERATION AND SUPPLY OF TWO-STROKE ENDOTHERMIC ENGINES, PARTICULARLY TO BE EMPLOYED IN THE INDUSTRIAL SECTOR RELEVANT TO MICROENGINES IN THE HOBBY-MODELLISTIC FIELD - The invention concerns a method and an apparatus for optimization of operation and supply of two-stroke endothermic engines, particularly to be employed in the industrial sector relevant to micro engines in the hobby-modellistic field, so as to obtain an improvement of known two-stroke endothermic engines with suction by rotating disc valve, thanks to the use of methods permitting obtaining a better general efficiency of engine, thus obtaining lower consumption along with a better volumetric efficiency and a better mechanical efficiency. | 08-19-2010 |
| 20100258098 | Two-Stroke Engine and Related Methods - A two-stroke engine includes a crankshaft that is rotatable about an axis, and an engine block that includes a combustion cylinder and a compression cylinder. A first piston is slidably disposed within the combustion cylinder and is operatively coupled to the crankshaft for reciprocating movement within the combustion cylinder through a power stroke during each rotation of the crankshaft about the axis. A second piston is slidably disposed within the compression cylinder and is operatively coupled to the crankshaft for reciprocating movement within the compression cylinder such that fresh air is received and compressed in the compression cylinder during each rotation of the crankshaft about the axis. A conduit provides fluid communication between the combustion cylinder and the compression cylinder, and a fuel injector is in communication with the combustion cylinder for admitting fuel into the combustion cylinder. | 10-14-2010 |
| 20120227717 | TWO-STROKE ENGINES - A two-stroke, internal combustion engine which includes at least one set of paired first and second cylinders. The engine includes an air or air/fuel mixture inlet conduit bifurcated into inlet passages extending to respective first and second inlet ports of the first and second cylinders. A valve controls the passage of air or air/fuel mixture into the inlet passages. In one embodiment of the engine, a bypass passage provided with a bypass valve extends between the inlet ports of the paired cylinders. | 09-13-2012 |
| 20130327307 | 2-CYCLE ENGINE AND ENGINE-POWERED WORKING MACHINE HAVING THE SAME - A 2-cycle engine has: a piston reciprocably housed in a cylinder bore; an intake opening, an exhaust opening, and a scavenge opening provided in an inner peripheral wall of the cylinder bore and opened/closed by the piston; and a scavenge passage connecting the scavenge opening and a crank chamber. A valve that opens/closes the scavenge passage is provided on the scavenge passage. | 12-12-2013 |
| 20160032793 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE INTERNAL COMBUSTION ENGINE - An exhaust valve assembly for a two-stroke internal combustion engine has a valve actuator having a first pressure chamber and a second pressure chamber, and a valve operatively connected to the valve actuator. The first and second pressure chambers are adapted for selectively receiving one of a first pressure and a second pressure. The first pressure is higher than the second pressure. The valve actuator moves the valve between at least a first valve position and a second valve position. The valve actuator moves the valve to the first valve position when the first pressure is supplied to the first pressure chamber and the second pressure is supplied to the second pressure chamber. The valve actuator moves the valve to the second valve position when the second pressure is supplied to the first pressure chamber and the first pressure is supplied to the second pressure chamber. | 02-04-2016 |
| 123065000 |
Exhaust manifolds | 2 |
| 20090013979 | RECIPROCATING ENGINE - A reciprocating engine ( | 01-15-2009 |
| 20090013980 | TWO CYCLE ENGINE - Size reduction and pollution reduction are promoted in a two cycle engine. A two cycle engine includes: a cylinder which contains a piston so as to allow reciprocating movement of the piston; a scavenging gas reserving chamber which covers a lower opening of the cylinder so as to seal the lower opening; an intake portion which is provided in the scavenging gas reserving chamber; a scavenging passage which provides communication between the scavenging gas reserving chamber and the cylinder; a connecting rod which is connected to the piston and passes through the scavenging gas reserving chamber; a crank mechanism which allows linear reciprocating movement of the connecting rod; and a sealing portion which is provided in an insertion hole in the scavenging gas reserving chamber through which the connecting rod passes and which allows linear reciprocating movement of the connecting rod but seals the scavenging gas reserving chamber. The two cycle engine may have a structure in which the intake portion has a structure for drawing outside air into the scavenging gas reserving chamber and in which a spraying mechanism for spraying fuel is provided in the cylinder head. | 01-15-2009 |
| 20090013981 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block includes a scavenging passage, which extends between a combustion chamber and a crankcase chamber to communicate them together and has a scavenging port defined in the cylinder block so as to open at an inner peripheral surface of the cylinder block. An intake passage or exhaust passage, the scavenging passage including the scavenging port and a throughhole defined therebetween are formed by the use of a molding piece movable in a direction towards the fuel intake passage or exhaust passage and the throughhole is closed by a lid. | 01-15-2009 |
| 20090013982 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block for the two-cycle combustion engine includes a scavenging port open at an inner peripheral surface of the cylinder block so as to orient diagonally upwardly relative to a longitudinal axis of a cylinder bore and defined in the cylinder block in communication with a combustion chamber. This scavenging port is formed by cutting with the rotary cutting tool, then rotated about its own longitudinal axis, from an inner peripheral surface of the cylinder block. | 01-15-2009 |
| 20090020107 | Two-Stroke Engine, Especially for Landcraft, Watercraft, or Aircraft Models - Disclosed is a two-stroke engine, especially for landcraft, watercraft, or aircraft models, comprising a piston which can be moved up and down within a bush, defines a combination chamber at the top, and is connected to a crankshaft via a con-rod at the bottom, said crankshaft being rotatably mounted in a crank housing located below the bush. In order to reduce friction of the piston in the bush of such a two-stroke engine, the bottom end of the bush, which adjoins the crank housing is provided with means that increase the temperature-related radial expansion of the bush. | 01-22-2009 |
| 20090064975 | TWO-STROKE COMBUSTION ENGINE - A method for the operation of a combustion engine operating in accordance with a two stroke principle, which comprises alternating power stroke and compression strokes, wherein the combustion engine comprises at least one cylinder ( | 03-12-2009 |
| 20090199828 | Air injection engine - An internal combustion engine of the present invention features separate compression and expansion cycles. The engine includes a separate compressor device which pressurizes air by a ratio greater than 15 to 1, at least one two stroke combustion cylinder and a compressed air conduit for transferring compressed air from the compressor to the at least one combustion cylinder. An air injection valve injects the compressed air into the combustion cylinder during the second half portion of the return stroke of the combustion cylinder. The compressed air is mixed with fuel and combusted for expansion during a power stroke. In this engine compression occurs only to a minor degree in the combustion cylinder. Accordingly, the compression ratio of the present engine may be significantly higher or lower than the volumetric expansion ratio of the combustion cylinder thus resulting in corresponding increases in either power density or thermodynamic efficiency respectively. | 08-13-2009 |
| 20090255519 | SILENCER FOR A MOTOR DEVICE - A silencer for a two-stroke engine includes a first chamber and a second chamber, wherein a flow channel is provided between an outlet of a combustion chamber and the first chamber. A high charge degree of the combustion chamber has a pressure ratio in the region of the outlet which reduces or prevents an escape of fresh gas from the combustion chamber. The flow channel between the outlet and the first chamber is flow-favourably shaped in such a manner that the exhaust gas that flows out of the outlet because of its mass inertia predominantly flows into the first chamber and following charging of the first chamber flows back again and as a result a back pressure is formed in the direction of the combustion chamber. | 10-15-2009 |
| 20090277434 | CONTROL STRATEGY FOR MULTI-STROKE ENGINE SYSTEM - An engine system and a method of operation are described. As one example, the method may include: during a first operating condition, operating a cylinder of the engine in a two stroke cycle to combust a first mixture of air and fuel, and adjusting an opening overlap between an intake poppet valve and an exhaust poppet valve of the cylinder to vary a composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve; and during a second operating condition, operating a cylinder of the engine in a four stroke cycle to combust a second mixture of air and fuel, and adjusting a relative amount of fuel contained in the second mixture of air and fuel to vary the composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve. | 11-12-2009 |
| 20100206278 | POWER CUTTER - A power cutter including a two stroke internal combustion engine mounted within a housing and a carburetor for providing aerated fuel for the engine. The carburetor is capable of operating in at least two modes of operation, a first mode when the engine is cold and a second mode when the engine is hot. A temperature sensor is mounted on the engine and provides an engine controller with a signal which is a function of the temperature of the engine; the carburetor comprising an electrically controlled cold start mechanism which switches the carburetor between its two modes of operation, wherein, when the electronic controller determines that the engine is cold, it provides an electrical signal to the electrically controlled cold start mechanism to cause it to change the mode of operation of the carburetor to its first mode. | 08-19-2010 |
| 20100294254 | Inverted cross-scavenged, two-overhead valve, 2-stroke engine - A two-stroke internal combustion engine which has an Inverted Cross-Scavenged operation forming a 180° air and exhaust gas loop and having two overhead valves [ | 11-25-2010 |
| 20100326411 | TWO STROKE ENGINE WITH REGULAR LUBRICATION SYSTEM - This is a novel two-stroke engine design which achieves the best properties of both the two and the four-stroke types of engine. The design has a simple and effective lubrication system, a clean exhaust system, and an increased power to displacement ratio. | 12-30-2010 |
| 20100326412 | Carburetor and Two-Stroke Engine with a Carburetor - A carburetor has a carburetor housing in which an air passage and a mixture passage are disposed. A barrel valve controls the air passage and the mixture passage. The barrel valve has a mixture passage section and an air passage section formed therein. The air passage in at least one position of the barrel valve is closed off at least partially by the barrel valve. The air passage in the at least one position of the barrel valve in which the air passage is at least partially closed off by the barrel valve is connected by a connection within the barrel valve with the mixture passage. An internal combustion engine equipped with such a carburetor exhibits excellent running behavior. | 12-30-2010 |
| 20110061637 | Fuel System - In various embodiments, a metering apparatus may be associated with an engine. The metering apparatus may include a first passageway for transporting air to a first port of an engine, and a second passageway for transporting gaseous fuel to a second port of the engine. | 03-17-2011 |
| 20110303202 | INTERNAL COMBUSTION ENGINE - An internal combustion engine, having at least one cylinder bank, the or each cylinder bank having two outer high pressure cylinders and a central low pressure cylinder, reciprocating pistons of the cylinders being coupled via connecting rods to a crankshaft, the valves of the cylinders being actuated via camshafts which can be driven from the crankshaft, crossflow channels for exhaust gas formed in the region of the or each cylinder bank between outlet valves of the high pressure cylinders and inlet valves of the respective low pressure cylinder, and each crossflow channel and the respective high pressure cylinder of the or each cylinder bank being designed in such a way that a dimensional ratio of a volume of the crossflow channel in cm | 12-15-2011 |
| 20110315132 | Diesel Engine, Predetermined Breaking Component for Diesel Engine as well as Method for Avoiding Damages to a Diesel Engine - The invention concerns a Diesel engine, in particular a two stroke crosshead large Diesel engine comprising at least one combustion chamber, which is enclosed on multiple sides by a cylinder, and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall for the combustion chamber, wherein the combustion chamber on its outer wall presents a predetermined breaking point. The predetermined breaking point is suited to protect the Diesel engine against possible damages which might be caused by an undesirably high overpressure (py) of gases in the combustion chamber during a malfunction of the Diesel engine, wherein the predetermined breaking point comprises a predetermined breaking pressure (ps) below the overpressure (py) above which damages are expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions. A predetermined breaking component comprising the predetermined breaking point, and a method in which for preventing the damages at least one predetermined breaking component is provided in the outer wall of at least one combustion chamber. | 12-29-2011 |
| 20120180769 | Two-Cycle Engine - A two-cycle engine having a structure in which the shaft center C | 07-19-2012 |
| 20120192840 | LOST-MOTION VARIABLE VALVE ACTUATION SYSTEM WITH VALVE DEACTIVATION - Devices and related methods are disclosed that generally involve the selective deactivation of one or more engine valves. In one embodiment, a split-cycle internal combustion engine is provided in which a high-speed trigger valve is used to fill and drain a hydraulic tappet that forms part of a lost-motion system of an engine valve. A spool valve can be used to selectively disconnect the tappet from the trigger valve, thereby deactivating the associated engine valve (i.e., preventing the engine valve from opening). The devices and methods disclosed herein also have application in conventional internal combustion engines and can be used with inwardly-opening and/or outwardly-opening valves. | 08-02-2012 |
| 20120204848 | CRANKSHAFT FOR A TWO-STROKE ENGINE - A crankshaft has a receiving platform for catching lubricant dropping from a main bearing assembly. The receiving platform has at least one wall disposed thereon. The wall has one point that is the furthest from the rotational axis of the crankshaft. One channel is defined in the platform and has an inlet disposed close to the point of the wall that is furthest from the rotational axis of the crankshaft. The channel has an outlet in the vicinity of a connecting rod bearing assembly, so that lubricant dropped on the receiving platform will flow to the connecting rod bearing assembly. | 08-16-2012 |
| 20120298083 | TWO-STROKE HEAVY FUEL ENGINE - A two-stroke internal combustion engine is provided. The two-stroke engine can be integrated into a variety of devices, including for example unmanned aerial vehicles, and can operate on heavy fuels including JP-5 and JP-8, for example. In some embodiments, engine can include a crankshaft including first and second main shaft portions interconnected by an offset crank web. The offset crank web can include opposing end portions that are offset from each other and define spaced apart centerlines generally perpendicular to and coplanar with the crankshaft centerline. In other embodiments, the engine can provide improvements in engine cooling, engine exhaust, lubrication delivery, engine mounting, engine fuel delivery and propeller attachment, for example. | 11-29-2012 |
| 20130228159 | TWO-STROKE ENGINE HAVING AN INTAKE ARRANGEMENT - A two-stroke engine has an intake arrangement including a carburetor. An intake channel divides into a mixture channel and an air channel. An intermediate flange is mounted between the carburetor and the cylinder. This flange has a carburetor connecting surface, which faces toward the carburetor, and a cylinder connecting surface which faces toward the cylinder. Referred to the flow direction in the intake channel, the air channel divides upstream of the cylinder connecting surface into two branches. The first branch has a first longitudinal center axis and the second branch has a second longitudinal center axis. The intersect points of the center axes with the connecting surfaces are mutually connected via an imaginary connecting line in the carburetor connecting surface or the cylinder connecting surface. The two connecting lines conjointly define an angle β in the carburetor connecting surface with this angle being greater than 0°. | 09-05-2013 |
| 20130239933 | TWO-CYCLE ENGINE - A pair of suction-side scavenging ports introduces a working gas containing fuel into a combustion chamber, and the working gases are caused to collide with each other to thereby form a working gas layer in a state of two vortexes rotating in opposite directions to each other, and a pair of exhaust-side scavenging ports introduces a non-working gas having a lower fuel content rate than the working gas into the combustion chamber, and the non-working gases are caused to collide with each other to thereby form a non-working gas layer in a state of one vortex. | 09-19-2013 |
| 20130327306 | ROTARY SYNCHRONOUS CHARGE TRAPPING - An exemplary two-stroke internal combustion engine can comprise one or more cylinders comprising exhaust ports, one or more pistons configured to cyclically cover and uncover the exhaust ports during reciprocation of the pistons within the cylinders, and one or more rotary exhaust valves associated with each exhaust port. The exhaust valves can be configured to rotate around a valve axis that is substantially parallel to an axis of rotation of a crank shaft of the engine. Each exhaust valve at least partially obstructs the associated exhaust port during a portion of the exhaust valve's rotation about the valve axis while the associated exhaust port is at least partially uncovered by the associated piston, thereby trapping fresh charge within the combustion chamber. | 12-12-2013 |
| 20140000574 | MUFFLER AND ENGINE-DRIVEN WORK MACHINE | 01-02-2014 |
| 20140034033 | Pancake engine with overexpansion - The crankshaft is stopped part way through the upstroke by a rotary start stop mechanism. As the piston nears the end of the compression stroke, vertical ridges on the piston, in conjunction with mating vertical ridges in the cylinder head, effectively partition the combustion chamber into multiple combustion chambers. In a spark ignition engine, this allows the compression ratio of a smaller cylinder. For HCCI (homogenoous charge compression ignition) operation, the partitions can be ignited at varying times, somewhat averaging the pressure rise. Expansion proceeds to BDC, providing overexpansion. The exhaust valve(s) open prior to BDC. The upstroke continues to the crankshaft stopping angle. Purge is by poppet valves with the inlet valves generating a swirl about the cylinder axis. Power is varied by varying the frequency of cycles, not by reducing the power per cycle. | 02-06-2014 |
| 20140209078 | Adjusting of Air-Fuel Ratio of a Two-Stroke Internal Combustion Engine - To meet stringent emission standards and improve performance of two-stroke crankcase-scavenged engines, the muffler ( | 07-31-2014 |
| 20140261347 | INTERNAL COMBUSTION ENGINE AND ASSOCIATED SYSTEMS AND METHODS - An internal combustion engine comprising a combustion chamber having a surrounding sidewall with a piston slideably disposed in the surrounding sidewall. A motion conversion mechanism is connected to the piston via a piston rod, and is operative to convert reciprocating motion of the piston into rotary motion. The motion conversion mechanism comprises a cam drum and at least one roller connected to the piston rod. A piston valve including a valve head and a valve stem extends through the piston. The piston valve is moveable between an open position and a closed position to control fluid movement through the flow passage. The valve head is pivotably connected to the valve stem and the engine includes a linkage connected to the valve head that is operative to pivot the valve head between an intake position and an exhaust position. | 09-18-2014 |
| 20150075506 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a piston that defines a main combustion chamber with a surrounding wall of a cylinder and a cylinder head, a fuel gas injector configured to inject fuel gas, a scavenging port that supplies air into the main combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a precombustion chamber cap that defines a precombustion chamber inside thereof, a fuel injection timing control unit configured to inject the fuel gas into the main combustion chamber and to inject the fuel gas into the main combustion chamber upon the piston being positioned in the vicinity of the top dead center, and an ignition timing control unit configured to ignite a mixed air of the fuel gas and the air inside the precombustion chamber upon the piston being positioned in the vicinity of the top dead center. | 03-19-2015 |
| 20150337793 | COMBUSTION IGNITION SYSTEM - Ignition systems, devices, and methods of using a resistive heating element to initiate combustion in internal combustion engines are disclosed. In one embodiment, an ignition system comprises a conductive member having a portion arranged for positioning within a combustion chamber of an internal combustion engine and comprising at least two high-resistance portions separated by a low-resistance portion, the high-resistance portions arranged to reach a temperature sufficient to cause ignition within the engine. In some instances, a conductive member positioned within a combustion chamber and arranged to ignite an air/fuel mixture comprises an inner portion and an outer portion, the inner portion comprising a heat removing portion arranged to remove heat from the outer portion sufficient to prevent pre-ignition. Other embodiments are disclosed. | 11-26-2015 |
| 20160076441 | COMPACT NON-VIBRATING ENDOTHERMIC ENGINE - The Compact Non Vibrating Endothermic Engine (CoNVEE in the following) is an internal combustion engine with reciprocating motion of the pistons, whose innovative architecture makes it more compact, given the same delivered power, with respect to the current state of the art. This happens both because the CoNVEE core occupies a very reduced volume, and also because it does not require the presence of any additional compensation or damping of mechanical vibrations. In fact all the moving parts of the CoNVEE are already internally compensated: they act in perfect anti-symmetry compensating each inertia force developed, excluding, of course, that of the motor shaft which is indispensable for the generation of the useful mechanical energy. The intrinsic compactness of the CoNVEE is made possible by the new and characteristic mechanism adopted for the motion transfer from the pistons to the motor shaft. The CoNVEE may be conveniently used with any type of propulsion fuel and, particularly, for those applications which require high power density and low vibration in the motor. | 03-17-2016 |
| 20160377035 | Air Cleaner For Stratified Scavenging Two-Stroke Internal Combustion Engine - To improve the effect of preventing contamination of an element in an air cleaner. An air cleaner includes a first inlet ( | 12-29-2016 |
| 20080196701 | Two-Stroke Internal Combustion Engine with Enhanced Scavenging - The engine has at least one cylinder ( | 08-21-2008 |
| 20110197866 | METHOD OF OPERATION OF TWO-STROKE FORCED CYLINDER FILLING ENGINE - The invention relates to propulsion engineering, namely to methods of operation of two-stroke engines. The invention makes it possible to increase the power-to-volume ratio of an engine through better cylinder filling and to improve engine performance through the utilization of combustion product energy, while using parts that are easy to produce from inexpensive and readily available materials. The essence of the invention is that a portion of incoming charge is by-passed from a cylinder, during the filling thereof, to an exhaust manifold after the combustion products so that a part of the exhaust manifold is filled. A portion of the combustion products is returned towards the cylinder cavity by fully closing the exhaust manifold with the aid of a valve member, and an incoming charge is pumped from the exhaust manifold to the cylinder cavity via exhaust members by virtue of combustion product energy when the scavenging ports are already closed. | 08-18-2011 |
| 20150114372 | Structures, functions, and methods regarding internal combustion engines - Improved structures, functions, and methods regarding internal combustion engines (ICE's). ICE embodiments disclosed are divided into three groups, all of which have at least one embodiment structurally possessing at least one actively powered fan cooperating with at least one exhaust manifold. All of said embodiments disclosed at least solve the objective technical problem of reducing emissions in an ICE. Said embodiments include both normally aspirated and forced induction ICE's. Said embodiments are capable of operation in two stroke cycle Homogeneous Charge Compression Ignition (HCCI) mode, two stroke cycle spark ignition mode, two stroke cycle combination spark ignition and HCCI mode, or four stroke cycle spark ignition mode. The technical field respecting all embodiments and or their methodologies relates generally to ICE's. Principal uses of the embodiments include enabling the operation of ICE's in the above said various mode or modes. | 04-30-2015 |
| 20080276919 | Piston, A Ring and a Piston Assembly for a Two Cycle Engine - A piston ring ( | 11-13-2008 |
| 20080283029 | Two-stroke internal combustion engine - Disclosed is a two-stroke internal combustion engine comprising a cylinder ( | 11-20-2008 |
| 20100037876 | Two-stroke internal combustion engine with valves for improved fuel efficiency - A two-stroke cycle internal combustion engine has a cylinder with a cylinder head closing off an end of the cylinder, a crankshaft and a piston connecting with the crankshaft to move the piston in a reciprocating movement within the cylinder. Intake and exhaust valves move into and out of a combustion chamber for openings and closures of the valves. A mixture of fuel and air is forced into the cylinder during an open interval of the intake valve beginning in the middle of the upstroke and terminating in a range of 20-60 degrees before top dead center to improve efficiency and choice of fuel by minimizing compressive forces of the piston during the upstroke. Timing of the closure of the intake valve may be delayed automatically with a reduction in crankshaft angular speed. | 02-18-2010 |
| 20120227716 | TWO-STROKE MOTOR WITH IMPROVED SILENCER AND ADAPTED MOTOR MANAGEMENT - In order to further develop a two-stroke motor with a silencer, whereby the silencer has a silencer inlet to which a flow channel connects, and the flow channel is so flow-beneficially designed between the silencer inlet and the first chamber that due to its mass inertia the exhaust gas flowing into the silencer inlet predominantly flows into the first chamber and after filling the first chamber flows back again thereby forming a counter-pressure in the direction of the combustion chamber, so that the above-described drawbacks are prevented, it is proposed to set the ignition time for igniting a fuel-air mixture present in the combustion chamber at an earlier time before the dead centre of a piston defining the combustion chamber in terms of stroke movement, compared with the ignition time of a two-stroke motor operated with a silencer structurally limited to the second chamber. | 09-13-2012 |
| 20140318515 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - An air-leading type, stratified scavenging two-stroke engine. The engine including a cylinder member and a crankcase joined therewith has an intake passage, an exhaust passage, first and second scavenging passages, a communicating portion and an air passage. The intake passage, the exhaust passage and the air passage are formed in the cylinder member. The first and the second scavenging passages each has a cylinder member-side passage and a crankcase-side passage. The cylinder member-side passages of both of the first and the second scavenging passages communicate with each other via the communicating portion. The air passage is connected to the cylinder member-side passage of the first scavenging passage. In the engine, air for pre-scavenging is introduced from the air passage through a check valve into the cylinder member-side passage of the first scavenging passage, and a part of the introduced air flows into the second scavenging passage through the communicating portion. | 10-30-2014 |
| 20150034060 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE ENGINE - An exhaust valve assembly has a valve actuator, a first valve part (FVP) operatively connected to the actuator, a second valve part (SVP), and at least one auxiliary valve operatively connected to the second valve part. When the actuator is in a first position, the FVP is in a fourth position, the SVP is in a seventh position and the at least one auxiliary valve is in a ninth position. When the actuator is in a second position, the FVP is in a fifth position, the SVP is in the seventh position and the at least one auxiliary valve is in the ninth position. When the actuator is in a third position, the FVP is in a sixth position, the SVP is in an eighth position and the at least one auxiliary valve is in a tenth position. The second position is intermediate the first and third positions. | 02-05-2015 |
| 20160032816 | UNIFLOW TWO-STROKE ENGINE - A uniflow two-stroke engine includes: a cylinder receiving a piston such that the piston can reciprocate therein and defining a combustion chamber above the piston; an exhaust port having one end in communication with an upper end portion of the cylinder; a scavenging port having a scavenging orifice at one end, the scavenging orifice being in communication with a lower part of a side portion of the cylinder such that the scavenging port is selectively brought into communication with and shut off from the combustion chamber by the piston; and an exhaust gas recirculation passage having one end in communication with a part of the side portion of the cylinder above the scavenging port and the other end in communication with the scavenging port such that the exhaust gas recirculation passage is selectively brought into communication with and shut off from the combustion chamber by the piston. | 02-04-2016 |
| 20160177812 | METHOD FOR CONTROLLING A TWO-STROKE INTERNAL COMBUSTION ENGINE | 06-23-2016 |
| 20190145308 | TWO-STROKE INTERNAL COMBUSTION ENGINE | 05-16-2019 |
| 20150047620 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a cylinder, a cylinder head, a piston that defines a combustion chamber with a surrounding wall of the cylinder and the cylinder head, a fuel gas injector, an ignition unit, a scavenging port configured to supply air into the combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a fuel gas injection timing control unit configured to cause the fuel gas injector to inject the fuel gas upon the piston being positioned at 10° to 100° before top dead center in an ascending stroke and to cause the fuel gas injector to inject the fuel gas upon the piston being positioned in vicinity of the top dead center, and an ignition timing control unit configured to ignite the fuel gas inside the combustion chamber upon the piston being positioned in the vicinity of the top dead center. | 02-19-2015 |
| 20090283079 | Air Cleaner For Stratified-Scavenging Two-Stroke Internal Combustion Engine - Object It is intended to prevent intrusion of air-fuel mixture into an air cleaner by blow-back in an air-fuel mixture passage of a stratified-scavenging two-stroke engine. | 11-19-2009 |
| 20110061636 | Two-Stroke Engine - A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air and charge inlet passages are substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially perpendicular to the piston pin. | 03-17-2011 |
| 20090050124 | Two-Cycle Engine - A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved. | 02-26-2009 |
| 20100037874 | TWO-STROKE ENGINE EMISSION CONTROL - A two-stroke internal combustion engine is provided. The engine includes a block defining a crankcase for enclosing a fuel mixture and a cylinder chamber formed at an end of a cylinder bore, an air passage in fluid communication with the cylinder bore, a scavenging transfer passage communicating between the crankcase and the cylinder chamber and having a primary transfer port in communication with a secondary transfer port, the secondary port having a first and a spaced-apart second window with a bridge spanning the space therebetween, and a piston slideably positioned in the cylinder bore and having a channel formed in a periphery of the piston and having a piston opening defined therein for providing selective communication between the crankcase and the transfer passage. | 02-18-2010 |
| 20100037875 | TWO CYCLE ENGINE AND TOOL - The invention provides a two cycle engine which can improve an output by effective scavenging. In a two cycle engine having an exhaust port provided in a side portion of a cylinder, and a scavenge air port provided in the side portion of the cylinder so as to be symmetrical with a plane passing through a center in a cylinder circumference direction of the exhaust port an axis extending to inside of the cylinder, the scavenge air port is structured such that an axis extending to inside of the cylinder from an opening of the scavenge air port in such a direction as to be away from the exhaust port of the cylinder, and is divided in an cylinder axis direction by a dividing portion. | 02-18-2010 |
| 20100288251 | SCAVENGING COVER AND TWO-CYCLE ENGINE - Since a throttle hole for narrowing a scavenging passage is provided on a partition for closing the scavenging passage, the throttle hole of a desired size can be drilled at a desired location on the partition after preparing the scavenging cover having no throttle hole on the partition. Accordingly, the size and location of the throttle hole can be easily changed in conducting a test for finding the most appropriate size and location of the throttle hole, so that the most appropriate size and location of the throttle hole can be easily found. | 11-18-2010 |
| 20110146641 | Internal Combustion Engine - An internal combustion engine has a cylinder with cylinder liner and a reciprocatingly supported piston delimiting a combustion chamber and driving in rotation a crankshaft in a crankcase. A device for supplying fuel and combustion air is provided. At least one transfer passage connects in at least one piston position the crankcase interior with the combustion chamber. The transfer passage has a transfer port that opens into the combustion chamber and an opening that opens into the crankcase. Opening and transfer port are displaced relative to each other in circumferential direction of the cylinder. The cylinder liner has at least one segment of a piston bearing surface and forms at least one wall section of the transfer passage. The cylinder has an upper cylinder segment and a lower cylinder segment that are separately embodied. The cylinder liner is separate from the upper and lower cylinder segments. | 06-23-2011 |
| 20110220074 | STRATIFIED TWO-STROKE ENGINE AND FUEL - Various embodiments include a two-stroke engine and a carburetor for use with gaseous fuel, such as hydrogen, methane, liquid petroleum gas, pure propane, and butane. | 09-15-2011 |
| 20120152216 | TWO-STROKE ENGINE - A two stroke engine comprises a cylinder, in which a combustion chamber bounded by a piston is formed, and an intake passage. A carburetor forms a section of the intake passage, within which a throttle element is mounted pivotably, and at least one main fuel opening and at least one idling fuel opening open into the intake passage, which is divided downstream of the carburetor into an air passage and a mixture passage. The idling fuel opening feeds a secondary passage arranged within the mixture passage. In the idling position, the throttle element may be arranged adjacent to the upstream entry opening in the secondary passage, and the throttle element may have an opening which, in the idling position of the throttle element, is arranged in the region of the entry opening and connects the secondary passage to that region of the intake passage located upstream of the throttle element. | 06-21-2012 |
| 20130228158 | TWO STROKE ENGINE PORTING ARRANGEMENT - A gas transfer port system for a cylinder of a two stroke internal combustion engine; said cylinder provided with a fixed separator plate dividing said cylinder into an upper section and a lower section; a piston in said cylinder reciprocating between said separator plate and a cylinder head; and wherein an annular skirt descending from said separator plate forms at least a portion of an annular well between said skirt and an internal surface of said cylinder; said well sealed at the bottom such that said cylinder is isolated from a crankcase of said engine; said gas transfer port system including at least one long gas transfer port connecting a lower portion of said annular well with a gas transfer port outlet aperture in a wall of said cylinder. | 09-05-2013 |
| 20140216425 | REDUCTION OF RING CLIPPING IN TWO-STROKE CYCLE ENGINES - A port for a cylinder of a two-stroke cycle engine includes at least one generally circumferential array of port openings. Port openings have a shape that reduces ring clipping during engine operation. The port opening shape is defined at a bore surface by opposing top and bottom edges joined by side edges. Each of the top and bottom edges is characterized by rounded corner transitions to the side edges, a rounded peak, and inclined ramp portions extending from the rounded corner transitions to the rounded peak. | 08-07-2014 |
| 20140216426 | TWO-CYCLE ENGINE AND METHOD FOR LUBRICATING TWO-CYCLE ENGINE - The two-cycle engine includes a piston capable of reciprocating along a cylinder, the piston being provided with piston rings; and a lubrication port provided in the cylinder, the lubrication port being used to supply a lubricant to a sliding surface of the cylinder on which the piston rings slide. Inter-ring spaces are provided, each inter-ring space being between adjacent piston rings. In addition, the two-cycle engine includes a controller used to adjust a lubrication period of lubricating from the lubrication port during movement of the piston toward a top dead center thereof, so that a period before an uppermost inter-ring space passing by the lubrication port is excluded from the lubrication period and a period in which at least part of a lowermost inter-ring space faces the lubrication port is included in the lubrication period. | 08-07-2014 |
| 20160097343 | Air Leading-Type Stratified Scavenging Two-Stroke Internal-Combustion Engine - The certainty of supplying air to a scavenging channel through a piston groove is improved. In a cylinder wall | 04-07-2016 |
| 20180023528 | INJECTION SYSTEM FOR TWO-STROKE ENGINES | 01-25-2018 |
| 20110155111 | EXHAUST GAS RECIRCULATION SYSTEM FOR A LOCOMOTIVE TWO-STROKE UNIFLOW SCAVENGED DIESEL ENGINE - A locomotive two-stroke uniflow scavenged diesel engine system including an exhaust gas recirculation (EGR) system is described for reducing NO | 06-30-2011 |
| 20120304972 | TWO-STROKE ENGINE WITH LOW CONSUMPTION AND LOW EMISSIONS - Two-stroke engine ( | 12-06-2012 |
| 20130247885 | TWO-STROKE ENGINE AND FOUR-STROKE ENGINE - A two-stroke engine ( | 09-26-2013 |
| 20080223349 | Stratified scavenging two-stoke cycle engine - A stratified scavenging two-stroke cycle engine with the check valve for introducing scavenging air simplified in construction is provided. The gasket between the flange part forming an air supply chamber and a mixture passage at a side of the cylinder and the passage connecting member having an air flow passage and a mixture flow passage is composed to have an integral leaf valve for allowing air in the air flow passage in the passage connecting member to flow only toward the air supply chamber which is connected to the scavenging passages of the engine so that the gasket has a function as a seal member and that as a check valve. | 09-18-2008 |
| 20100192928 | TWO-STROKE CYCLE COMBUSTION ENGINE OF AIR SCAVENGING TYPE - To provide a two-stroke cycle combustion engine of an air scavenging type, in which not only can transit from the idling condition to the rapid accelerating condition take place smoothly, but the combustion engine can be smoothly started, there are provided scavenging passages ( | 08-05-2010 |
| 20100206279 | METHOD AND APPARATUS FOR OPTIMIZATION OF OPERATION AND SUPPLY OF TWO-STROKE ENDOTHERMIC ENGINES, PARTICULARLY TO BE EMPLOYED IN THE INDUSTRIAL SECTOR RELEVANT TO MICROENGINES IN THE HOBBY-MODELLISTIC FIELD - The invention concerns a method and an apparatus for optimization of operation and supply of two-stroke endothermic engines, particularly to be employed in the industrial sector relevant to micro engines in the hobby-modellistic field, so as to obtain an improvement of known two-stroke endothermic engines with suction by rotating disc valve, thanks to the use of methods permitting obtaining a better general efficiency of engine, thus obtaining lower consumption along with a better volumetric efficiency and a better mechanical efficiency. | 08-19-2010 |
| 20100258098 | Two-Stroke Engine and Related Methods - A two-stroke engine includes a crankshaft that is rotatable about an axis, and an engine block that includes a combustion cylinder and a compression cylinder. A first piston is slidably disposed within the combustion cylinder and is operatively coupled to the crankshaft for reciprocating movement within the combustion cylinder through a power stroke during each rotation of the crankshaft about the axis. A second piston is slidably disposed within the compression cylinder and is operatively coupled to the crankshaft for reciprocating movement within the compression cylinder such that fresh air is received and compressed in the compression cylinder during each rotation of the crankshaft about the axis. A conduit provides fluid communication between the combustion cylinder and the compression cylinder, and a fuel injector is in communication with the combustion cylinder for admitting fuel into the combustion cylinder. | 10-14-2010 |
| 20120227717 | TWO-STROKE ENGINES - A two-stroke, internal combustion engine which includes at least one set of paired first and second cylinders. The engine includes an air or air/fuel mixture inlet conduit bifurcated into inlet passages extending to respective first and second inlet ports of the first and second cylinders. A valve controls the passage of air or air/fuel mixture into the inlet passages. In one embodiment of the engine, a bypass passage provided with a bypass valve extends between the inlet ports of the paired cylinders. | 09-13-2012 |
| 20130327307 | 2-CYCLE ENGINE AND ENGINE-POWERED WORKING MACHINE HAVING THE SAME - A 2-cycle engine has: a piston reciprocably housed in a cylinder bore; an intake opening, an exhaust opening, and a scavenge opening provided in an inner peripheral wall of the cylinder bore and opened/closed by the piston; and a scavenge passage connecting the scavenge opening and a crank chamber. A valve that opens/closes the scavenge passage is provided on the scavenge passage. | 12-12-2013 |
| 20160032793 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE INTERNAL COMBUSTION ENGINE - An exhaust valve assembly for a two-stroke internal combustion engine has a valve actuator having a first pressure chamber and a second pressure chamber, and a valve operatively connected to the valve actuator. The first and second pressure chambers are adapted for selectively receiving one of a first pressure and a second pressure. The first pressure is higher than the second pressure. The valve actuator moves the valve between at least a first valve position and a second valve position. The valve actuator moves the valve to the first valve position when the first pressure is supplied to the first pressure chamber and the second pressure is supplied to the second pressure chamber. The valve actuator moves the valve to the second valve position when the second pressure is supplied to the first pressure chamber and the first pressure is supplied to the second pressure chamber. | 02-04-2016 |
| 123065000 |
Pumps | 2 |
| 20090013979 | RECIPROCATING ENGINE - A reciprocating engine ( | 01-15-2009 |
| 20090013980 | TWO CYCLE ENGINE - Size reduction and pollution reduction are promoted in a two cycle engine. A two cycle engine includes: a cylinder which contains a piston so as to allow reciprocating movement of the piston; a scavenging gas reserving chamber which covers a lower opening of the cylinder so as to seal the lower opening; an intake portion which is provided in the scavenging gas reserving chamber; a scavenging passage which provides communication between the scavenging gas reserving chamber and the cylinder; a connecting rod which is connected to the piston and passes through the scavenging gas reserving chamber; a crank mechanism which allows linear reciprocating movement of the connecting rod; and a sealing portion which is provided in an insertion hole in the scavenging gas reserving chamber through which the connecting rod passes and which allows linear reciprocating movement of the connecting rod but seals the scavenging gas reserving chamber. The two cycle engine may have a structure in which the intake portion has a structure for drawing outside air into the scavenging gas reserving chamber and in which a spraying mechanism for spraying fuel is provided in the cylinder head. | 01-15-2009 |
| 20090013981 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block includes a scavenging passage, which extends between a combustion chamber and a crankcase chamber to communicate them together and has a scavenging port defined in the cylinder block so as to open at an inner peripheral surface of the cylinder block. An intake passage or exhaust passage, the scavenging passage including the scavenging port and a throughhole defined therebetween are formed by the use of a molding piece movable in a direction towards the fuel intake passage or exhaust passage and the throughhole is closed by a lid. | 01-15-2009 |
| 20090013982 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block for the two-cycle combustion engine includes a scavenging port open at an inner peripheral surface of the cylinder block so as to orient diagonally upwardly relative to a longitudinal axis of a cylinder bore and defined in the cylinder block in communication with a combustion chamber. This scavenging port is formed by cutting with the rotary cutting tool, then rotated about its own longitudinal axis, from an inner peripheral surface of the cylinder block. | 01-15-2009 |
| 20090020107 | Two-Stroke Engine, Especially for Landcraft, Watercraft, or Aircraft Models - Disclosed is a two-stroke engine, especially for landcraft, watercraft, or aircraft models, comprising a piston which can be moved up and down within a bush, defines a combination chamber at the top, and is connected to a crankshaft via a con-rod at the bottom, said crankshaft being rotatably mounted in a crank housing located below the bush. In order to reduce friction of the piston in the bush of such a two-stroke engine, the bottom end of the bush, which adjoins the crank housing is provided with means that increase the temperature-related radial expansion of the bush. | 01-22-2009 |
| 20090064975 | TWO-STROKE COMBUSTION ENGINE - A method for the operation of a combustion engine operating in accordance with a two stroke principle, which comprises alternating power stroke and compression strokes, wherein the combustion engine comprises at least one cylinder ( | 03-12-2009 |
| 20090199828 | Air injection engine - An internal combustion engine of the present invention features separate compression and expansion cycles. The engine includes a separate compressor device which pressurizes air by a ratio greater than 15 to 1, at least one two stroke combustion cylinder and a compressed air conduit for transferring compressed air from the compressor to the at least one combustion cylinder. An air injection valve injects the compressed air into the combustion cylinder during the second half portion of the return stroke of the combustion cylinder. The compressed air is mixed with fuel and combusted for expansion during a power stroke. In this engine compression occurs only to a minor degree in the combustion cylinder. Accordingly, the compression ratio of the present engine may be significantly higher or lower than the volumetric expansion ratio of the combustion cylinder thus resulting in corresponding increases in either power density or thermodynamic efficiency respectively. | 08-13-2009 |
| 20090255519 | SILENCER FOR A MOTOR DEVICE - A silencer for a two-stroke engine includes a first chamber and a second chamber, wherein a flow channel is provided between an outlet of a combustion chamber and the first chamber. A high charge degree of the combustion chamber has a pressure ratio in the region of the outlet which reduces or prevents an escape of fresh gas from the combustion chamber. The flow channel between the outlet and the first chamber is flow-favourably shaped in such a manner that the exhaust gas that flows out of the outlet because of its mass inertia predominantly flows into the first chamber and following charging of the first chamber flows back again and as a result a back pressure is formed in the direction of the combustion chamber. | 10-15-2009 |
| 20090277434 | CONTROL STRATEGY FOR MULTI-STROKE ENGINE SYSTEM - An engine system and a method of operation are described. As one example, the method may include: during a first operating condition, operating a cylinder of the engine in a two stroke cycle to combust a first mixture of air and fuel, and adjusting an opening overlap between an intake poppet valve and an exhaust poppet valve of the cylinder to vary a composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve; and during a second operating condition, operating a cylinder of the engine in a four stroke cycle to combust a second mixture of air and fuel, and adjusting a relative amount of fuel contained in the second mixture of air and fuel to vary the composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve. | 11-12-2009 |
| 20100206278 | POWER CUTTER - A power cutter including a two stroke internal combustion engine mounted within a housing and a carburetor for providing aerated fuel for the engine. The carburetor is capable of operating in at least two modes of operation, a first mode when the engine is cold and a second mode when the engine is hot. A temperature sensor is mounted on the engine and provides an engine controller with a signal which is a function of the temperature of the engine; the carburetor comprising an electrically controlled cold start mechanism which switches the carburetor between its two modes of operation, wherein, when the electronic controller determines that the engine is cold, it provides an electrical signal to the electrically controlled cold start mechanism to cause it to change the mode of operation of the carburetor to its first mode. | 08-19-2010 |
| 20100294254 | Inverted cross-scavenged, two-overhead valve, 2-stroke engine - A two-stroke internal combustion engine which has an Inverted Cross-Scavenged operation forming a 180° air and exhaust gas loop and having two overhead valves [ | 11-25-2010 |
| 20100326411 | TWO STROKE ENGINE WITH REGULAR LUBRICATION SYSTEM - This is a novel two-stroke engine design which achieves the best properties of both the two and the four-stroke types of engine. The design has a simple and effective lubrication system, a clean exhaust system, and an increased power to displacement ratio. | 12-30-2010 |
| 20100326412 | Carburetor and Two-Stroke Engine with a Carburetor - A carburetor has a carburetor housing in which an air passage and a mixture passage are disposed. A barrel valve controls the air passage and the mixture passage. The barrel valve has a mixture passage section and an air passage section formed therein. The air passage in at least one position of the barrel valve is closed off at least partially by the barrel valve. The air passage in the at least one position of the barrel valve in which the air passage is at least partially closed off by the barrel valve is connected by a connection within the barrel valve with the mixture passage. An internal combustion engine equipped with such a carburetor exhibits excellent running behavior. | 12-30-2010 |
| 20110061637 | Fuel System - In various embodiments, a metering apparatus may be associated with an engine. The metering apparatus may include a first passageway for transporting air to a first port of an engine, and a second passageway for transporting gaseous fuel to a second port of the engine. | 03-17-2011 |
| 20110303202 | INTERNAL COMBUSTION ENGINE - An internal combustion engine, having at least one cylinder bank, the or each cylinder bank having two outer high pressure cylinders and a central low pressure cylinder, reciprocating pistons of the cylinders being coupled via connecting rods to a crankshaft, the valves of the cylinders being actuated via camshafts which can be driven from the crankshaft, crossflow channels for exhaust gas formed in the region of the or each cylinder bank between outlet valves of the high pressure cylinders and inlet valves of the respective low pressure cylinder, and each crossflow channel and the respective high pressure cylinder of the or each cylinder bank being designed in such a way that a dimensional ratio of a volume of the crossflow channel in cm | 12-15-2011 |
| 20110315132 | Diesel Engine, Predetermined Breaking Component for Diesel Engine as well as Method for Avoiding Damages to a Diesel Engine - The invention concerns a Diesel engine, in particular a two stroke crosshead large Diesel engine comprising at least one combustion chamber, which is enclosed on multiple sides by a cylinder, and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall for the combustion chamber, wherein the combustion chamber on its outer wall presents a predetermined breaking point. The predetermined breaking point is suited to protect the Diesel engine against possible damages which might be caused by an undesirably high overpressure (py) of gases in the combustion chamber during a malfunction of the Diesel engine, wherein the predetermined breaking point comprises a predetermined breaking pressure (ps) below the overpressure (py) above which damages are expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions. A predetermined breaking component comprising the predetermined breaking point, and a method in which for preventing the damages at least one predetermined breaking component is provided in the outer wall of at least one combustion chamber. | 12-29-2011 |
| 20120180769 | Two-Cycle Engine - A two-cycle engine having a structure in which the shaft center C | 07-19-2012 |
| 20120192840 | LOST-MOTION VARIABLE VALVE ACTUATION SYSTEM WITH VALVE DEACTIVATION - Devices and related methods are disclosed that generally involve the selective deactivation of one or more engine valves. In one embodiment, a split-cycle internal combustion engine is provided in which a high-speed trigger valve is used to fill and drain a hydraulic tappet that forms part of a lost-motion system of an engine valve. A spool valve can be used to selectively disconnect the tappet from the trigger valve, thereby deactivating the associated engine valve (i.e., preventing the engine valve from opening). The devices and methods disclosed herein also have application in conventional internal combustion engines and can be used with inwardly-opening and/or outwardly-opening valves. | 08-02-2012 |
| 20120204848 | CRANKSHAFT FOR A TWO-STROKE ENGINE - A crankshaft has a receiving platform for catching lubricant dropping from a main bearing assembly. The receiving platform has at least one wall disposed thereon. The wall has one point that is the furthest from the rotational axis of the crankshaft. One channel is defined in the platform and has an inlet disposed close to the point of the wall that is furthest from the rotational axis of the crankshaft. The channel has an outlet in the vicinity of a connecting rod bearing assembly, so that lubricant dropped on the receiving platform will flow to the connecting rod bearing assembly. | 08-16-2012 |
| 20120298083 | TWO-STROKE HEAVY FUEL ENGINE - A two-stroke internal combustion engine is provided. The two-stroke engine can be integrated into a variety of devices, including for example unmanned aerial vehicles, and can operate on heavy fuels including JP-5 and JP-8, for example. In some embodiments, engine can include a crankshaft including first and second main shaft portions interconnected by an offset crank web. The offset crank web can include opposing end portions that are offset from each other and define spaced apart centerlines generally perpendicular to and coplanar with the crankshaft centerline. In other embodiments, the engine can provide improvements in engine cooling, engine exhaust, lubrication delivery, engine mounting, engine fuel delivery and propeller attachment, for example. | 11-29-2012 |
| 20130228159 | TWO-STROKE ENGINE HAVING AN INTAKE ARRANGEMENT - A two-stroke engine has an intake arrangement including a carburetor. An intake channel divides into a mixture channel and an air channel. An intermediate flange is mounted between the carburetor and the cylinder. This flange has a carburetor connecting surface, which faces toward the carburetor, and a cylinder connecting surface which faces toward the cylinder. Referred to the flow direction in the intake channel, the air channel divides upstream of the cylinder connecting surface into two branches. The first branch has a first longitudinal center axis and the second branch has a second longitudinal center axis. The intersect points of the center axes with the connecting surfaces are mutually connected via an imaginary connecting line in the carburetor connecting surface or the cylinder connecting surface. The two connecting lines conjointly define an angle β in the carburetor connecting surface with this angle being greater than 0°. | 09-05-2013 |
| 20130239933 | TWO-CYCLE ENGINE - A pair of suction-side scavenging ports introduces a working gas containing fuel into a combustion chamber, and the working gases are caused to collide with each other to thereby form a working gas layer in a state of two vortexes rotating in opposite directions to each other, and a pair of exhaust-side scavenging ports introduces a non-working gas having a lower fuel content rate than the working gas into the combustion chamber, and the non-working gases are caused to collide with each other to thereby form a non-working gas layer in a state of one vortex. | 09-19-2013 |
| 20130327306 | ROTARY SYNCHRONOUS CHARGE TRAPPING - An exemplary two-stroke internal combustion engine can comprise one or more cylinders comprising exhaust ports, one or more pistons configured to cyclically cover and uncover the exhaust ports during reciprocation of the pistons within the cylinders, and one or more rotary exhaust valves associated with each exhaust port. The exhaust valves can be configured to rotate around a valve axis that is substantially parallel to an axis of rotation of a crank shaft of the engine. Each exhaust valve at least partially obstructs the associated exhaust port during a portion of the exhaust valve's rotation about the valve axis while the associated exhaust port is at least partially uncovered by the associated piston, thereby trapping fresh charge within the combustion chamber. | 12-12-2013 |
| 20140000574 | MUFFLER AND ENGINE-DRIVEN WORK MACHINE | 01-02-2014 |
| 20140034033 | Pancake engine with overexpansion - The crankshaft is stopped part way through the upstroke by a rotary start stop mechanism. As the piston nears the end of the compression stroke, vertical ridges on the piston, in conjunction with mating vertical ridges in the cylinder head, effectively partition the combustion chamber into multiple combustion chambers. In a spark ignition engine, this allows the compression ratio of a smaller cylinder. For HCCI (homogenoous charge compression ignition) operation, the partitions can be ignited at varying times, somewhat averaging the pressure rise. Expansion proceeds to BDC, providing overexpansion. The exhaust valve(s) open prior to BDC. The upstroke continues to the crankshaft stopping angle. Purge is by poppet valves with the inlet valves generating a swirl about the cylinder axis. Power is varied by varying the frequency of cycles, not by reducing the power per cycle. | 02-06-2014 |
| 20140209078 | Adjusting of Air-Fuel Ratio of a Two-Stroke Internal Combustion Engine - To meet stringent emission standards and improve performance of two-stroke crankcase-scavenged engines, the muffler ( | 07-31-2014 |
| 20140261347 | INTERNAL COMBUSTION ENGINE AND ASSOCIATED SYSTEMS AND METHODS - An internal combustion engine comprising a combustion chamber having a surrounding sidewall with a piston slideably disposed in the surrounding sidewall. A motion conversion mechanism is connected to the piston via a piston rod, and is operative to convert reciprocating motion of the piston into rotary motion. The motion conversion mechanism comprises a cam drum and at least one roller connected to the piston rod. A piston valve including a valve head and a valve stem extends through the piston. The piston valve is moveable between an open position and a closed position to control fluid movement through the flow passage. The valve head is pivotably connected to the valve stem and the engine includes a linkage connected to the valve head that is operative to pivot the valve head between an intake position and an exhaust position. | 09-18-2014 |
| 20150075506 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a piston that defines a main combustion chamber with a surrounding wall of a cylinder and a cylinder head, a fuel gas injector configured to inject fuel gas, a scavenging port that supplies air into the main combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a precombustion chamber cap that defines a precombustion chamber inside thereof, a fuel injection timing control unit configured to inject the fuel gas into the main combustion chamber and to inject the fuel gas into the main combustion chamber upon the piston being positioned in the vicinity of the top dead center, and an ignition timing control unit configured to ignite a mixed air of the fuel gas and the air inside the precombustion chamber upon the piston being positioned in the vicinity of the top dead center. | 03-19-2015 |
| 20150337793 | COMBUSTION IGNITION SYSTEM - Ignition systems, devices, and methods of using a resistive heating element to initiate combustion in internal combustion engines are disclosed. In one embodiment, an ignition system comprises a conductive member having a portion arranged for positioning within a combustion chamber of an internal combustion engine and comprising at least two high-resistance portions separated by a low-resistance portion, the high-resistance portions arranged to reach a temperature sufficient to cause ignition within the engine. In some instances, a conductive member positioned within a combustion chamber and arranged to ignite an air/fuel mixture comprises an inner portion and an outer portion, the inner portion comprising a heat removing portion arranged to remove heat from the outer portion sufficient to prevent pre-ignition. Other embodiments are disclosed. | 11-26-2015 |
| 20160076441 | COMPACT NON-VIBRATING ENDOTHERMIC ENGINE - The Compact Non Vibrating Endothermic Engine (CoNVEE in the following) is an internal combustion engine with reciprocating motion of the pistons, whose innovative architecture makes it more compact, given the same delivered power, with respect to the current state of the art. This happens both because the CoNVEE core occupies a very reduced volume, and also because it does not require the presence of any additional compensation or damping of mechanical vibrations. In fact all the moving parts of the CoNVEE are already internally compensated: they act in perfect anti-symmetry compensating each inertia force developed, excluding, of course, that of the motor shaft which is indispensable for the generation of the useful mechanical energy. The intrinsic compactness of the CoNVEE is made possible by the new and characteristic mechanism adopted for the motion transfer from the pistons to the motor shaft. The CoNVEE may be conveniently used with any type of propulsion fuel and, particularly, for those applications which require high power density and low vibration in the motor. | 03-17-2016 |
| 20160377035 | Air Cleaner For Stratified Scavenging Two-Stroke Internal Combustion Engine - To improve the effect of preventing contamination of an element in an air cleaner. An air cleaner includes a first inlet ( | 12-29-2016 |
| 20080196701 | Two-Stroke Internal Combustion Engine with Enhanced Scavenging - The engine has at least one cylinder ( | 08-21-2008 |
| 20110197866 | METHOD OF OPERATION OF TWO-STROKE FORCED CYLINDER FILLING ENGINE - The invention relates to propulsion engineering, namely to methods of operation of two-stroke engines. The invention makes it possible to increase the power-to-volume ratio of an engine through better cylinder filling and to improve engine performance through the utilization of combustion product energy, while using parts that are easy to produce from inexpensive and readily available materials. The essence of the invention is that a portion of incoming charge is by-passed from a cylinder, during the filling thereof, to an exhaust manifold after the combustion products so that a part of the exhaust manifold is filled. A portion of the combustion products is returned towards the cylinder cavity by fully closing the exhaust manifold with the aid of a valve member, and an incoming charge is pumped from the exhaust manifold to the cylinder cavity via exhaust members by virtue of combustion product energy when the scavenging ports are already closed. | 08-18-2011 |
| 20150114372 | Structures, functions, and methods regarding internal combustion engines - Improved structures, functions, and methods regarding internal combustion engines (ICE's). ICE embodiments disclosed are divided into three groups, all of which have at least one embodiment structurally possessing at least one actively powered fan cooperating with at least one exhaust manifold. All of said embodiments disclosed at least solve the objective technical problem of reducing emissions in an ICE. Said embodiments include both normally aspirated and forced induction ICE's. Said embodiments are capable of operation in two stroke cycle Homogeneous Charge Compression Ignition (HCCI) mode, two stroke cycle spark ignition mode, two stroke cycle combination spark ignition and HCCI mode, or four stroke cycle spark ignition mode. The technical field respecting all embodiments and or their methodologies relates generally to ICE's. Principal uses of the embodiments include enabling the operation of ICE's in the above said various mode or modes. | 04-30-2015 |
| 20080276919 | Piston, A Ring and a Piston Assembly for a Two Cycle Engine - A piston ring ( | 11-13-2008 |
| 20080283029 | Two-stroke internal combustion engine - Disclosed is a two-stroke internal combustion engine comprising a cylinder ( | 11-20-2008 |
| 20100037876 | Two-stroke internal combustion engine with valves for improved fuel efficiency - A two-stroke cycle internal combustion engine has a cylinder with a cylinder head closing off an end of the cylinder, a crankshaft and a piston connecting with the crankshaft to move the piston in a reciprocating movement within the cylinder. Intake and exhaust valves move into and out of a combustion chamber for openings and closures of the valves. A mixture of fuel and air is forced into the cylinder during an open interval of the intake valve beginning in the middle of the upstroke and terminating in a range of 20-60 degrees before top dead center to improve efficiency and choice of fuel by minimizing compressive forces of the piston during the upstroke. Timing of the closure of the intake valve may be delayed automatically with a reduction in crankshaft angular speed. | 02-18-2010 |
| 20120227716 | TWO-STROKE MOTOR WITH IMPROVED SILENCER AND ADAPTED MOTOR MANAGEMENT - In order to further develop a two-stroke motor with a silencer, whereby the silencer has a silencer inlet to which a flow channel connects, and the flow channel is so flow-beneficially designed between the silencer inlet and the first chamber that due to its mass inertia the exhaust gas flowing into the silencer inlet predominantly flows into the first chamber and after filling the first chamber flows back again thereby forming a counter-pressure in the direction of the combustion chamber, so that the above-described drawbacks are prevented, it is proposed to set the ignition time for igniting a fuel-air mixture present in the combustion chamber at an earlier time before the dead centre of a piston defining the combustion chamber in terms of stroke movement, compared with the ignition time of a two-stroke motor operated with a silencer structurally limited to the second chamber. | 09-13-2012 |
| 20140318515 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - An air-leading type, stratified scavenging two-stroke engine. The engine including a cylinder member and a crankcase joined therewith has an intake passage, an exhaust passage, first and second scavenging passages, a communicating portion and an air passage. The intake passage, the exhaust passage and the air passage are formed in the cylinder member. The first and the second scavenging passages each has a cylinder member-side passage and a crankcase-side passage. The cylinder member-side passages of both of the first and the second scavenging passages communicate with each other via the communicating portion. The air passage is connected to the cylinder member-side passage of the first scavenging passage. In the engine, air for pre-scavenging is introduced from the air passage through a check valve into the cylinder member-side passage of the first scavenging passage, and a part of the introduced air flows into the second scavenging passage through the communicating portion. | 10-30-2014 |
| 20150034060 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE ENGINE - An exhaust valve assembly has a valve actuator, a first valve part (FVP) operatively connected to the actuator, a second valve part (SVP), and at least one auxiliary valve operatively connected to the second valve part. When the actuator is in a first position, the FVP is in a fourth position, the SVP is in a seventh position and the at least one auxiliary valve is in a ninth position. When the actuator is in a second position, the FVP is in a fifth position, the SVP is in the seventh position and the at least one auxiliary valve is in the ninth position. When the actuator is in a third position, the FVP is in a sixth position, the SVP is in an eighth position and the at least one auxiliary valve is in a tenth position. The second position is intermediate the first and third positions. | 02-05-2015 |
| 20160032816 | UNIFLOW TWO-STROKE ENGINE - A uniflow two-stroke engine includes: a cylinder receiving a piston such that the piston can reciprocate therein and defining a combustion chamber above the piston; an exhaust port having one end in communication with an upper end portion of the cylinder; a scavenging port having a scavenging orifice at one end, the scavenging orifice being in communication with a lower part of a side portion of the cylinder such that the scavenging port is selectively brought into communication with and shut off from the combustion chamber by the piston; and an exhaust gas recirculation passage having one end in communication with a part of the side portion of the cylinder above the scavenging port and the other end in communication with the scavenging port such that the exhaust gas recirculation passage is selectively brought into communication with and shut off from the combustion chamber by the piston. | 02-04-2016 |
| 20160177812 | METHOD FOR CONTROLLING A TWO-STROKE INTERNAL COMBUSTION ENGINE | 06-23-2016 |
| 20190145308 | TWO-STROKE INTERNAL COMBUSTION ENGINE | 05-16-2019 |
| 20150047620 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a cylinder, a cylinder head, a piston that defines a combustion chamber with a surrounding wall of the cylinder and the cylinder head, a fuel gas injector, an ignition unit, a scavenging port configured to supply air into the combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a fuel gas injection timing control unit configured to cause the fuel gas injector to inject the fuel gas upon the piston being positioned at 10° to 100° before top dead center in an ascending stroke and to cause the fuel gas injector to inject the fuel gas upon the piston being positioned in vicinity of the top dead center, and an ignition timing control unit configured to ignite the fuel gas inside the combustion chamber upon the piston being positioned in the vicinity of the top dead center. | 02-19-2015 |
| 20090283079 | Air Cleaner For Stratified-Scavenging Two-Stroke Internal Combustion Engine - Object It is intended to prevent intrusion of air-fuel mixture into an air cleaner by blow-back in an air-fuel mixture passage of a stratified-scavenging two-stroke engine. | 11-19-2009 |
| 20110061636 | Two-Stroke Engine - A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air and charge inlet passages are substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially perpendicular to the piston pin. | 03-17-2011 |
| 20090050124 | Two-Cycle Engine - A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved. | 02-26-2009 |
| 20100037874 | TWO-STROKE ENGINE EMISSION CONTROL - A two-stroke internal combustion engine is provided. The engine includes a block defining a crankcase for enclosing a fuel mixture and a cylinder chamber formed at an end of a cylinder bore, an air passage in fluid communication with the cylinder bore, a scavenging transfer passage communicating between the crankcase and the cylinder chamber and having a primary transfer port in communication with a secondary transfer port, the secondary port having a first and a spaced-apart second window with a bridge spanning the space therebetween, and a piston slideably positioned in the cylinder bore and having a channel formed in a periphery of the piston and having a piston opening defined therein for providing selective communication between the crankcase and the transfer passage. | 02-18-2010 |
| 20100037875 | TWO CYCLE ENGINE AND TOOL - The invention provides a two cycle engine which can improve an output by effective scavenging. In a two cycle engine having an exhaust port provided in a side portion of a cylinder, and a scavenge air port provided in the side portion of the cylinder so as to be symmetrical with a plane passing through a center in a cylinder circumference direction of the exhaust port an axis extending to inside of the cylinder, the scavenge air port is structured such that an axis extending to inside of the cylinder from an opening of the scavenge air port in such a direction as to be away from the exhaust port of the cylinder, and is divided in an cylinder axis direction by a dividing portion. | 02-18-2010 |
| 20100288251 | SCAVENGING COVER AND TWO-CYCLE ENGINE - Since a throttle hole for narrowing a scavenging passage is provided on a partition for closing the scavenging passage, the throttle hole of a desired size can be drilled at a desired location on the partition after preparing the scavenging cover having no throttle hole on the partition. Accordingly, the size and location of the throttle hole can be easily changed in conducting a test for finding the most appropriate size and location of the throttle hole, so that the most appropriate size and location of the throttle hole can be easily found. | 11-18-2010 |
| 20110146641 | Internal Combustion Engine - An internal combustion engine has a cylinder with cylinder liner and a reciprocatingly supported piston delimiting a combustion chamber and driving in rotation a crankshaft in a crankcase. A device for supplying fuel and combustion air is provided. At least one transfer passage connects in at least one piston position the crankcase interior with the combustion chamber. The transfer passage has a transfer port that opens into the combustion chamber and an opening that opens into the crankcase. Opening and transfer port are displaced relative to each other in circumferential direction of the cylinder. The cylinder liner has at least one segment of a piston bearing surface and forms at least one wall section of the transfer passage. The cylinder has an upper cylinder segment and a lower cylinder segment that are separately embodied. The cylinder liner is separate from the upper and lower cylinder segments. | 06-23-2011 |
| 20110220074 | STRATIFIED TWO-STROKE ENGINE AND FUEL - Various embodiments include a two-stroke engine and a carburetor for use with gaseous fuel, such as hydrogen, methane, liquid petroleum gas, pure propane, and butane. | 09-15-2011 |
| 20120152216 | TWO-STROKE ENGINE - A two stroke engine comprises a cylinder, in which a combustion chamber bounded by a piston is formed, and an intake passage. A carburetor forms a section of the intake passage, within which a throttle element is mounted pivotably, and at least one main fuel opening and at least one idling fuel opening open into the intake passage, which is divided downstream of the carburetor into an air passage and a mixture passage. The idling fuel opening feeds a secondary passage arranged within the mixture passage. In the idling position, the throttle element may be arranged adjacent to the upstream entry opening in the secondary passage, and the throttle element may have an opening which, in the idling position of the throttle element, is arranged in the region of the entry opening and connects the secondary passage to that region of the intake passage located upstream of the throttle element. | 06-21-2012 |
| 20130228158 | TWO STROKE ENGINE PORTING ARRANGEMENT - A gas transfer port system for a cylinder of a two stroke internal combustion engine; said cylinder provided with a fixed separator plate dividing said cylinder into an upper section and a lower section; a piston in said cylinder reciprocating between said separator plate and a cylinder head; and wherein an annular skirt descending from said separator plate forms at least a portion of an annular well between said skirt and an internal surface of said cylinder; said well sealed at the bottom such that said cylinder is isolated from a crankcase of said engine; said gas transfer port system including at least one long gas transfer port connecting a lower portion of said annular well with a gas transfer port outlet aperture in a wall of said cylinder. | 09-05-2013 |
| 20140216425 | REDUCTION OF RING CLIPPING IN TWO-STROKE CYCLE ENGINES - A port for a cylinder of a two-stroke cycle engine includes at least one generally circumferential array of port openings. Port openings have a shape that reduces ring clipping during engine operation. The port opening shape is defined at a bore surface by opposing top and bottom edges joined by side edges. Each of the top and bottom edges is characterized by rounded corner transitions to the side edges, a rounded peak, and inclined ramp portions extending from the rounded corner transitions to the rounded peak. | 08-07-2014 |
| 20140216426 | TWO-CYCLE ENGINE AND METHOD FOR LUBRICATING TWO-CYCLE ENGINE - The two-cycle engine includes a piston capable of reciprocating along a cylinder, the piston being provided with piston rings; and a lubrication port provided in the cylinder, the lubrication port being used to supply a lubricant to a sliding surface of the cylinder on which the piston rings slide. Inter-ring spaces are provided, each inter-ring space being between adjacent piston rings. In addition, the two-cycle engine includes a controller used to adjust a lubrication period of lubricating from the lubrication port during movement of the piston toward a top dead center thereof, so that a period before an uppermost inter-ring space passing by the lubrication port is excluded from the lubrication period and a period in which at least part of a lowermost inter-ring space faces the lubrication port is included in the lubrication period. | 08-07-2014 |
| 20160097343 | Air Leading-Type Stratified Scavenging Two-Stroke Internal-Combustion Engine - The certainty of supplying air to a scavenging channel through a piston groove is improved. In a cylinder wall | 04-07-2016 |
| 20180023528 | INJECTION SYSTEM FOR TWO-STROKE ENGINES | 01-25-2018 |
| 20110155111 | EXHAUST GAS RECIRCULATION SYSTEM FOR A LOCOMOTIVE TWO-STROKE UNIFLOW SCAVENGED DIESEL ENGINE - A locomotive two-stroke uniflow scavenged diesel engine system including an exhaust gas recirculation (EGR) system is described for reducing NO | 06-30-2011 |
| 20120304972 | TWO-STROKE ENGINE WITH LOW CONSUMPTION AND LOW EMISSIONS - Two-stroke engine ( | 12-06-2012 |
| 20130247885 | TWO-STROKE ENGINE AND FOUR-STROKE ENGINE - A two-stroke engine ( | 09-26-2013 |
| 20080223349 | Stratified scavenging two-stoke cycle engine - A stratified scavenging two-stroke cycle engine with the check valve for introducing scavenging air simplified in construction is provided. The gasket between the flange part forming an air supply chamber and a mixture passage at a side of the cylinder and the passage connecting member having an air flow passage and a mixture flow passage is composed to have an integral leaf valve for allowing air in the air flow passage in the passage connecting member to flow only toward the air supply chamber which is connected to the scavenging passages of the engine so that the gasket has a function as a seal member and that as a check valve. | 09-18-2008 |
| 20100192928 | TWO-STROKE CYCLE COMBUSTION ENGINE OF AIR SCAVENGING TYPE - To provide a two-stroke cycle combustion engine of an air scavenging type, in which not only can transit from the idling condition to the rapid accelerating condition take place smoothly, but the combustion engine can be smoothly started, there are provided scavenging passages ( | 08-05-2010 |
| 20100206279 | METHOD AND APPARATUS FOR OPTIMIZATION OF OPERATION AND SUPPLY OF TWO-STROKE ENDOTHERMIC ENGINES, PARTICULARLY TO BE EMPLOYED IN THE INDUSTRIAL SECTOR RELEVANT TO MICROENGINES IN THE HOBBY-MODELLISTIC FIELD - The invention concerns a method and an apparatus for optimization of operation and supply of two-stroke endothermic engines, particularly to be employed in the industrial sector relevant to micro engines in the hobby-modellistic field, so as to obtain an improvement of known two-stroke endothermic engines with suction by rotating disc valve, thanks to the use of methods permitting obtaining a better general efficiency of engine, thus obtaining lower consumption along with a better volumetric efficiency and a better mechanical efficiency. | 08-19-2010 |
| 20100258098 | Two-Stroke Engine and Related Methods - A two-stroke engine includes a crankshaft that is rotatable about an axis, and an engine block that includes a combustion cylinder and a compression cylinder. A first piston is slidably disposed within the combustion cylinder and is operatively coupled to the crankshaft for reciprocating movement within the combustion cylinder through a power stroke during each rotation of the crankshaft about the axis. A second piston is slidably disposed within the compression cylinder and is operatively coupled to the crankshaft for reciprocating movement within the compression cylinder such that fresh air is received and compressed in the compression cylinder during each rotation of the crankshaft about the axis. A conduit provides fluid communication between the combustion cylinder and the compression cylinder, and a fuel injector is in communication with the combustion cylinder for admitting fuel into the combustion cylinder. | 10-14-2010 |
| 20120227717 | TWO-STROKE ENGINES - A two-stroke, internal combustion engine which includes at least one set of paired first and second cylinders. The engine includes an air or air/fuel mixture inlet conduit bifurcated into inlet passages extending to respective first and second inlet ports of the first and second cylinders. A valve controls the passage of air or air/fuel mixture into the inlet passages. In one embodiment of the engine, a bypass passage provided with a bypass valve extends between the inlet ports of the paired cylinders. | 09-13-2012 |
| 20130327307 | 2-CYCLE ENGINE AND ENGINE-POWERED WORKING MACHINE HAVING THE SAME - A 2-cycle engine has: a piston reciprocably housed in a cylinder bore; an intake opening, an exhaust opening, and a scavenge opening provided in an inner peripheral wall of the cylinder bore and opened/closed by the piston; and a scavenge passage connecting the scavenge opening and a crank chamber. A valve that opens/closes the scavenge passage is provided on the scavenge passage. | 12-12-2013 |
| 20160032793 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE INTERNAL COMBUSTION ENGINE - An exhaust valve assembly for a two-stroke internal combustion engine has a valve actuator having a first pressure chamber and a second pressure chamber, and a valve operatively connected to the valve actuator. The first and second pressure chambers are adapted for selectively receiving one of a first pressure and a second pressure. The first pressure is higher than the second pressure. The valve actuator moves the valve between at least a first valve position and a second valve position. The valve actuator moves the valve to the first valve position when the first pressure is supplied to the first pressure chamber and the second pressure is supplied to the second pressure chamber. The valve actuator moves the valve to the second valve position when the second pressure is supplied to the first pressure chamber and the first pressure is supplied to the second pressure chamber. | 02-04-2016 |
| 123069000 |
Separate air and gas pumps | 2 |
| 20120266851 | Intake System for a Two-Stroke Internal Combustion Engine - A combustion chamber of an internal combustion engine has primary intake ports located a first distance from the crankshaft and primary intake ports located a second distance from the crankshaft. One or more unidirectional valves, such as reed valves, are place in an intake duct upstream of the primary intake ports. The valves prevent backflow from the cylinder into the intake when the pressure in the cylinder exceeds that of the intake. The backflow into the intake is reduced by having valves in the intake; therefore scavenging efficiency is improved. Furthermore, the asymmetry between the intake and exhaust port timing may be reduced by providing such valves. Additionally, the total intake port area can be increased with two sets of intake ports and valves disposed in the primary ports, thereby improving the volumetric efficiency in spite of the pressure drop presented by the valves. | 10-25-2012 |
| 20150330297 | TWO-CYCLE PNEUMATIC INJECTION ENGINE - A two-cycle engine that includes a high pressure fuel pump that pressurizes fuel to produce pressurized fuel and pumps the pressurized fuel from a fuel controller to a fuel injector. The fuel injector injects the pressurized fuel into a cylinder. A high pressure air pump pressurizes air to produce pressurized air and pumps the pressurized air from an air controller to an air injector. The air injector injects the pressurized air into the cylinder. | 11-19-2015 |
| 123065000 |
Scavenging by inertia of exhaust gas and charging by use of pressure waves | 1 |
| 20090013979 | RECIPROCATING ENGINE - A reciprocating engine ( | 01-15-2009 |
| 20090013980 | TWO CYCLE ENGINE - Size reduction and pollution reduction are promoted in a two cycle engine. A two cycle engine includes: a cylinder which contains a piston so as to allow reciprocating movement of the piston; a scavenging gas reserving chamber which covers a lower opening of the cylinder so as to seal the lower opening; an intake portion which is provided in the scavenging gas reserving chamber; a scavenging passage which provides communication between the scavenging gas reserving chamber and the cylinder; a connecting rod which is connected to the piston and passes through the scavenging gas reserving chamber; a crank mechanism which allows linear reciprocating movement of the connecting rod; and a sealing portion which is provided in an insertion hole in the scavenging gas reserving chamber through which the connecting rod passes and which allows linear reciprocating movement of the connecting rod but seals the scavenging gas reserving chamber. The two cycle engine may have a structure in which the intake portion has a structure for drawing outside air into the scavenging gas reserving chamber and in which a spraying mechanism for spraying fuel is provided in the cylinder head. | 01-15-2009 |
| 20090013981 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block includes a scavenging passage, which extends between a combustion chamber and a crankcase chamber to communicate them together and has a scavenging port defined in the cylinder block so as to open at an inner peripheral surface of the cylinder block. An intake passage or exhaust passage, the scavenging passage including the scavenging port and a throughhole defined therebetween are formed by the use of a molding piece movable in a direction towards the fuel intake passage or exhaust passage and the throughhole is closed by a lid. | 01-15-2009 |
| 20090013982 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block for the two-cycle combustion engine includes a scavenging port open at an inner peripheral surface of the cylinder block so as to orient diagonally upwardly relative to a longitudinal axis of a cylinder bore and defined in the cylinder block in communication with a combustion chamber. This scavenging port is formed by cutting with the rotary cutting tool, then rotated about its own longitudinal axis, from an inner peripheral surface of the cylinder block. | 01-15-2009 |
| 20090020107 | Two-Stroke Engine, Especially for Landcraft, Watercraft, or Aircraft Models - Disclosed is a two-stroke engine, especially for landcraft, watercraft, or aircraft models, comprising a piston which can be moved up and down within a bush, defines a combination chamber at the top, and is connected to a crankshaft via a con-rod at the bottom, said crankshaft being rotatably mounted in a crank housing located below the bush. In order to reduce friction of the piston in the bush of such a two-stroke engine, the bottom end of the bush, which adjoins the crank housing is provided with means that increase the temperature-related radial expansion of the bush. | 01-22-2009 |
| 20090064975 | TWO-STROKE COMBUSTION ENGINE - A method for the operation of a combustion engine operating in accordance with a two stroke principle, which comprises alternating power stroke and compression strokes, wherein the combustion engine comprises at least one cylinder ( | 03-12-2009 |
| 20090199828 | Air injection engine - An internal combustion engine of the present invention features separate compression and expansion cycles. The engine includes a separate compressor device which pressurizes air by a ratio greater than 15 to 1, at least one two stroke combustion cylinder and a compressed air conduit for transferring compressed air from the compressor to the at least one combustion cylinder. An air injection valve injects the compressed air into the combustion cylinder during the second half portion of the return stroke of the combustion cylinder. The compressed air is mixed with fuel and combusted for expansion during a power stroke. In this engine compression occurs only to a minor degree in the combustion cylinder. Accordingly, the compression ratio of the present engine may be significantly higher or lower than the volumetric expansion ratio of the combustion cylinder thus resulting in corresponding increases in either power density or thermodynamic efficiency respectively. | 08-13-2009 |
| 20090255519 | SILENCER FOR A MOTOR DEVICE - A silencer for a two-stroke engine includes a first chamber and a second chamber, wherein a flow channel is provided between an outlet of a combustion chamber and the first chamber. A high charge degree of the combustion chamber has a pressure ratio in the region of the outlet which reduces or prevents an escape of fresh gas from the combustion chamber. The flow channel between the outlet and the first chamber is flow-favourably shaped in such a manner that the exhaust gas that flows out of the outlet because of its mass inertia predominantly flows into the first chamber and following charging of the first chamber flows back again and as a result a back pressure is formed in the direction of the combustion chamber. | 10-15-2009 |
| 20090277434 | CONTROL STRATEGY FOR MULTI-STROKE ENGINE SYSTEM - An engine system and a method of operation are described. As one example, the method may include: during a first operating condition, operating a cylinder of the engine in a two stroke cycle to combust a first mixture of air and fuel, and adjusting an opening overlap between an intake poppet valve and an exhaust poppet valve of the cylinder to vary a composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve; and during a second operating condition, operating a cylinder of the engine in a four stroke cycle to combust a second mixture of air and fuel, and adjusting a relative amount of fuel contained in the second mixture of air and fuel to vary the composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve. | 11-12-2009 |
| 20100206278 | POWER CUTTER - A power cutter including a two stroke internal combustion engine mounted within a housing and a carburetor for providing aerated fuel for the engine. The carburetor is capable of operating in at least two modes of operation, a first mode when the engine is cold and a second mode when the engine is hot. A temperature sensor is mounted on the engine and provides an engine controller with a signal which is a function of the temperature of the engine; the carburetor comprising an electrically controlled cold start mechanism which switches the carburetor between its two modes of operation, wherein, when the electronic controller determines that the engine is cold, it provides an electrical signal to the electrically controlled cold start mechanism to cause it to change the mode of operation of the carburetor to its first mode. | 08-19-2010 |
| 20100294254 | Inverted cross-scavenged, two-overhead valve, 2-stroke engine - A two-stroke internal combustion engine which has an Inverted Cross-Scavenged operation forming a 180° air and exhaust gas loop and having two overhead valves [ | 11-25-2010 |
| 20100326411 | TWO STROKE ENGINE WITH REGULAR LUBRICATION SYSTEM - This is a novel two-stroke engine design which achieves the best properties of both the two and the four-stroke types of engine. The design has a simple and effective lubrication system, a clean exhaust system, and an increased power to displacement ratio. | 12-30-2010 |
| 20100326412 | Carburetor and Two-Stroke Engine with a Carburetor - A carburetor has a carburetor housing in which an air passage and a mixture passage are disposed. A barrel valve controls the air passage and the mixture passage. The barrel valve has a mixture passage section and an air passage section formed therein. The air passage in at least one position of the barrel valve is closed off at least partially by the barrel valve. The air passage in the at least one position of the barrel valve in which the air passage is at least partially closed off by the barrel valve is connected by a connection within the barrel valve with the mixture passage. An internal combustion engine equipped with such a carburetor exhibits excellent running behavior. | 12-30-2010 |
| 20110061637 | Fuel System - In various embodiments, a metering apparatus may be associated with an engine. The metering apparatus may include a first passageway for transporting air to a first port of an engine, and a second passageway for transporting gaseous fuel to a second port of the engine. | 03-17-2011 |
| 20110303202 | INTERNAL COMBUSTION ENGINE - An internal combustion engine, having at least one cylinder bank, the or each cylinder bank having two outer high pressure cylinders and a central low pressure cylinder, reciprocating pistons of the cylinders being coupled via connecting rods to a crankshaft, the valves of the cylinders being actuated via camshafts which can be driven from the crankshaft, crossflow channels for exhaust gas formed in the region of the or each cylinder bank between outlet valves of the high pressure cylinders and inlet valves of the respective low pressure cylinder, and each crossflow channel and the respective high pressure cylinder of the or each cylinder bank being designed in such a way that a dimensional ratio of a volume of the crossflow channel in cm | 12-15-2011 |
| 20110315132 | Diesel Engine, Predetermined Breaking Component for Diesel Engine as well as Method for Avoiding Damages to a Diesel Engine - The invention concerns a Diesel engine, in particular a two stroke crosshead large Diesel engine comprising at least one combustion chamber, which is enclosed on multiple sides by a cylinder, and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall for the combustion chamber, wherein the combustion chamber on its outer wall presents a predetermined breaking point. The predetermined breaking point is suited to protect the Diesel engine against possible damages which might be caused by an undesirably high overpressure (py) of gases in the combustion chamber during a malfunction of the Diesel engine, wherein the predetermined breaking point comprises a predetermined breaking pressure (ps) below the overpressure (py) above which damages are expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions. A predetermined breaking component comprising the predetermined breaking point, and a method in which for preventing the damages at least one predetermined breaking component is provided in the outer wall of at least one combustion chamber. | 12-29-2011 |
| 20120180769 | Two-Cycle Engine - A two-cycle engine having a structure in which the shaft center C | 07-19-2012 |
| 20120192840 | LOST-MOTION VARIABLE VALVE ACTUATION SYSTEM WITH VALVE DEACTIVATION - Devices and related methods are disclosed that generally involve the selective deactivation of one or more engine valves. In one embodiment, a split-cycle internal combustion engine is provided in which a high-speed trigger valve is used to fill and drain a hydraulic tappet that forms part of a lost-motion system of an engine valve. A spool valve can be used to selectively disconnect the tappet from the trigger valve, thereby deactivating the associated engine valve (i.e., preventing the engine valve from opening). The devices and methods disclosed herein also have application in conventional internal combustion engines and can be used with inwardly-opening and/or outwardly-opening valves. | 08-02-2012 |
| 20120204848 | CRANKSHAFT FOR A TWO-STROKE ENGINE - A crankshaft has a receiving platform for catching lubricant dropping from a main bearing assembly. The receiving platform has at least one wall disposed thereon. The wall has one point that is the furthest from the rotational axis of the crankshaft. One channel is defined in the platform and has an inlet disposed close to the point of the wall that is furthest from the rotational axis of the crankshaft. The channel has an outlet in the vicinity of a connecting rod bearing assembly, so that lubricant dropped on the receiving platform will flow to the connecting rod bearing assembly. | 08-16-2012 |
| 20120298083 | TWO-STROKE HEAVY FUEL ENGINE - A two-stroke internal combustion engine is provided. The two-stroke engine can be integrated into a variety of devices, including for example unmanned aerial vehicles, and can operate on heavy fuels including JP-5 and JP-8, for example. In some embodiments, engine can include a crankshaft including first and second main shaft portions interconnected by an offset crank web. The offset crank web can include opposing end portions that are offset from each other and define spaced apart centerlines generally perpendicular to and coplanar with the crankshaft centerline. In other embodiments, the engine can provide improvements in engine cooling, engine exhaust, lubrication delivery, engine mounting, engine fuel delivery and propeller attachment, for example. | 11-29-2012 |
| 20130228159 | TWO-STROKE ENGINE HAVING AN INTAKE ARRANGEMENT - A two-stroke engine has an intake arrangement including a carburetor. An intake channel divides into a mixture channel and an air channel. An intermediate flange is mounted between the carburetor and the cylinder. This flange has a carburetor connecting surface, which faces toward the carburetor, and a cylinder connecting surface which faces toward the cylinder. Referred to the flow direction in the intake channel, the air channel divides upstream of the cylinder connecting surface into two branches. The first branch has a first longitudinal center axis and the second branch has a second longitudinal center axis. The intersect points of the center axes with the connecting surfaces are mutually connected via an imaginary connecting line in the carburetor connecting surface or the cylinder connecting surface. The two connecting lines conjointly define an angle β in the carburetor connecting surface with this angle being greater than 0°. | 09-05-2013 |
| 20130239933 | TWO-CYCLE ENGINE - A pair of suction-side scavenging ports introduces a working gas containing fuel into a combustion chamber, and the working gases are caused to collide with each other to thereby form a working gas layer in a state of two vortexes rotating in opposite directions to each other, and a pair of exhaust-side scavenging ports introduces a non-working gas having a lower fuel content rate than the working gas into the combustion chamber, and the non-working gases are caused to collide with each other to thereby form a non-working gas layer in a state of one vortex. | 09-19-2013 |
| 20130327306 | ROTARY SYNCHRONOUS CHARGE TRAPPING - An exemplary two-stroke internal combustion engine can comprise one or more cylinders comprising exhaust ports, one or more pistons configured to cyclically cover and uncover the exhaust ports during reciprocation of the pistons within the cylinders, and one or more rotary exhaust valves associated with each exhaust port. The exhaust valves can be configured to rotate around a valve axis that is substantially parallel to an axis of rotation of a crank shaft of the engine. Each exhaust valve at least partially obstructs the associated exhaust port during a portion of the exhaust valve's rotation about the valve axis while the associated exhaust port is at least partially uncovered by the associated piston, thereby trapping fresh charge within the combustion chamber. | 12-12-2013 |
| 20140000574 | MUFFLER AND ENGINE-DRIVEN WORK MACHINE | 01-02-2014 |
| 20140034033 | Pancake engine with overexpansion - The crankshaft is stopped part way through the upstroke by a rotary start stop mechanism. As the piston nears the end of the compression stroke, vertical ridges on the piston, in conjunction with mating vertical ridges in the cylinder head, effectively partition the combustion chamber into multiple combustion chambers. In a spark ignition engine, this allows the compression ratio of a smaller cylinder. For HCCI (homogenoous charge compression ignition) operation, the partitions can be ignited at varying times, somewhat averaging the pressure rise. Expansion proceeds to BDC, providing overexpansion. The exhaust valve(s) open prior to BDC. The upstroke continues to the crankshaft stopping angle. Purge is by poppet valves with the inlet valves generating a swirl about the cylinder axis. Power is varied by varying the frequency of cycles, not by reducing the power per cycle. | 02-06-2014 |
| 20140209078 | Adjusting of Air-Fuel Ratio of a Two-Stroke Internal Combustion Engine - To meet stringent emission standards and improve performance of two-stroke crankcase-scavenged engines, the muffler ( | 07-31-2014 |
| 20140261347 | INTERNAL COMBUSTION ENGINE AND ASSOCIATED SYSTEMS AND METHODS - An internal combustion engine comprising a combustion chamber having a surrounding sidewall with a piston slideably disposed in the surrounding sidewall. A motion conversion mechanism is connected to the piston via a piston rod, and is operative to convert reciprocating motion of the piston into rotary motion. The motion conversion mechanism comprises a cam drum and at least one roller connected to the piston rod. A piston valve including a valve head and a valve stem extends through the piston. The piston valve is moveable between an open position and a closed position to control fluid movement through the flow passage. The valve head is pivotably connected to the valve stem and the engine includes a linkage connected to the valve head that is operative to pivot the valve head between an intake position and an exhaust position. | 09-18-2014 |
| 20150075506 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a piston that defines a main combustion chamber with a surrounding wall of a cylinder and a cylinder head, a fuel gas injector configured to inject fuel gas, a scavenging port that supplies air into the main combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a precombustion chamber cap that defines a precombustion chamber inside thereof, a fuel injection timing control unit configured to inject the fuel gas into the main combustion chamber and to inject the fuel gas into the main combustion chamber upon the piston being positioned in the vicinity of the top dead center, and an ignition timing control unit configured to ignite a mixed air of the fuel gas and the air inside the precombustion chamber upon the piston being positioned in the vicinity of the top dead center. | 03-19-2015 |
| 20150337793 | COMBUSTION IGNITION SYSTEM - Ignition systems, devices, and methods of using a resistive heating element to initiate combustion in internal combustion engines are disclosed. In one embodiment, an ignition system comprises a conductive member having a portion arranged for positioning within a combustion chamber of an internal combustion engine and comprising at least two high-resistance portions separated by a low-resistance portion, the high-resistance portions arranged to reach a temperature sufficient to cause ignition within the engine. In some instances, a conductive member positioned within a combustion chamber and arranged to ignite an air/fuel mixture comprises an inner portion and an outer portion, the inner portion comprising a heat removing portion arranged to remove heat from the outer portion sufficient to prevent pre-ignition. Other embodiments are disclosed. | 11-26-2015 |
| 20160076441 | COMPACT NON-VIBRATING ENDOTHERMIC ENGINE - The Compact Non Vibrating Endothermic Engine (CoNVEE in the following) is an internal combustion engine with reciprocating motion of the pistons, whose innovative architecture makes it more compact, given the same delivered power, with respect to the current state of the art. This happens both because the CoNVEE core occupies a very reduced volume, and also because it does not require the presence of any additional compensation or damping of mechanical vibrations. In fact all the moving parts of the CoNVEE are already internally compensated: they act in perfect anti-symmetry compensating each inertia force developed, excluding, of course, that of the motor shaft which is indispensable for the generation of the useful mechanical energy. The intrinsic compactness of the CoNVEE is made possible by the new and characteristic mechanism adopted for the motion transfer from the pistons to the motor shaft. The CoNVEE may be conveniently used with any type of propulsion fuel and, particularly, for those applications which require high power density and low vibration in the motor. | 03-17-2016 |
| 20160377035 | Air Cleaner For Stratified Scavenging Two-Stroke Internal Combustion Engine - To improve the effect of preventing contamination of an element in an air cleaner. An air cleaner includes a first inlet ( | 12-29-2016 |
| 20080196701 | Two-Stroke Internal Combustion Engine with Enhanced Scavenging - The engine has at least one cylinder ( | 08-21-2008 |
| 20110197866 | METHOD OF OPERATION OF TWO-STROKE FORCED CYLINDER FILLING ENGINE - The invention relates to propulsion engineering, namely to methods of operation of two-stroke engines. The invention makes it possible to increase the power-to-volume ratio of an engine through better cylinder filling and to improve engine performance through the utilization of combustion product energy, while using parts that are easy to produce from inexpensive and readily available materials. The essence of the invention is that a portion of incoming charge is by-passed from a cylinder, during the filling thereof, to an exhaust manifold after the combustion products so that a part of the exhaust manifold is filled. A portion of the combustion products is returned towards the cylinder cavity by fully closing the exhaust manifold with the aid of a valve member, and an incoming charge is pumped from the exhaust manifold to the cylinder cavity via exhaust members by virtue of combustion product energy when the scavenging ports are already closed. | 08-18-2011 |
| 20150114372 | Structures, functions, and methods regarding internal combustion engines - Improved structures, functions, and methods regarding internal combustion engines (ICE's). ICE embodiments disclosed are divided into three groups, all of which have at least one embodiment structurally possessing at least one actively powered fan cooperating with at least one exhaust manifold. All of said embodiments disclosed at least solve the objective technical problem of reducing emissions in an ICE. Said embodiments include both normally aspirated and forced induction ICE's. Said embodiments are capable of operation in two stroke cycle Homogeneous Charge Compression Ignition (HCCI) mode, two stroke cycle spark ignition mode, two stroke cycle combination spark ignition and HCCI mode, or four stroke cycle spark ignition mode. The technical field respecting all embodiments and or their methodologies relates generally to ICE's. Principal uses of the embodiments include enabling the operation of ICE's in the above said various mode or modes. | 04-30-2015 |
| 20080276919 | Piston, A Ring and a Piston Assembly for a Two Cycle Engine - A piston ring ( | 11-13-2008 |
| 20080283029 | Two-stroke internal combustion engine - Disclosed is a two-stroke internal combustion engine comprising a cylinder ( | 11-20-2008 |
| 20100037876 | Two-stroke internal combustion engine with valves for improved fuel efficiency - A two-stroke cycle internal combustion engine has a cylinder with a cylinder head closing off an end of the cylinder, a crankshaft and a piston connecting with the crankshaft to move the piston in a reciprocating movement within the cylinder. Intake and exhaust valves move into and out of a combustion chamber for openings and closures of the valves. A mixture of fuel and air is forced into the cylinder during an open interval of the intake valve beginning in the middle of the upstroke and terminating in a range of 20-60 degrees before top dead center to improve efficiency and choice of fuel by minimizing compressive forces of the piston during the upstroke. Timing of the closure of the intake valve may be delayed automatically with a reduction in crankshaft angular speed. | 02-18-2010 |
| 20120227716 | TWO-STROKE MOTOR WITH IMPROVED SILENCER AND ADAPTED MOTOR MANAGEMENT - In order to further develop a two-stroke motor with a silencer, whereby the silencer has a silencer inlet to which a flow channel connects, and the flow channel is so flow-beneficially designed between the silencer inlet and the first chamber that due to its mass inertia the exhaust gas flowing into the silencer inlet predominantly flows into the first chamber and after filling the first chamber flows back again thereby forming a counter-pressure in the direction of the combustion chamber, so that the above-described drawbacks are prevented, it is proposed to set the ignition time for igniting a fuel-air mixture present in the combustion chamber at an earlier time before the dead centre of a piston defining the combustion chamber in terms of stroke movement, compared with the ignition time of a two-stroke motor operated with a silencer structurally limited to the second chamber. | 09-13-2012 |
| 20140318515 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - An air-leading type, stratified scavenging two-stroke engine. The engine including a cylinder member and a crankcase joined therewith has an intake passage, an exhaust passage, first and second scavenging passages, a communicating portion and an air passage. The intake passage, the exhaust passage and the air passage are formed in the cylinder member. The first and the second scavenging passages each has a cylinder member-side passage and a crankcase-side passage. The cylinder member-side passages of both of the first and the second scavenging passages communicate with each other via the communicating portion. The air passage is connected to the cylinder member-side passage of the first scavenging passage. In the engine, air for pre-scavenging is introduced from the air passage through a check valve into the cylinder member-side passage of the first scavenging passage, and a part of the introduced air flows into the second scavenging passage through the communicating portion. | 10-30-2014 |
| 20150034060 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE ENGINE - An exhaust valve assembly has a valve actuator, a first valve part (FVP) operatively connected to the actuator, a second valve part (SVP), and at least one auxiliary valve operatively connected to the second valve part. When the actuator is in a first position, the FVP is in a fourth position, the SVP is in a seventh position and the at least one auxiliary valve is in a ninth position. When the actuator is in a second position, the FVP is in a fifth position, the SVP is in the seventh position and the at least one auxiliary valve is in the ninth position. When the actuator is in a third position, the FVP is in a sixth position, the SVP is in an eighth position and the at least one auxiliary valve is in a tenth position. The second position is intermediate the first and third positions. | 02-05-2015 |
| 20160032816 | UNIFLOW TWO-STROKE ENGINE - A uniflow two-stroke engine includes: a cylinder receiving a piston such that the piston can reciprocate therein and defining a combustion chamber above the piston; an exhaust port having one end in communication with an upper end portion of the cylinder; a scavenging port having a scavenging orifice at one end, the scavenging orifice being in communication with a lower part of a side portion of the cylinder such that the scavenging port is selectively brought into communication with and shut off from the combustion chamber by the piston; and an exhaust gas recirculation passage having one end in communication with a part of the side portion of the cylinder above the scavenging port and the other end in communication with the scavenging port such that the exhaust gas recirculation passage is selectively brought into communication with and shut off from the combustion chamber by the piston. | 02-04-2016 |
| 20160177812 | METHOD FOR CONTROLLING A TWO-STROKE INTERNAL COMBUSTION ENGINE | 06-23-2016 |
| 20190145308 | TWO-STROKE INTERNAL COMBUSTION ENGINE | 05-16-2019 |
| 20150047620 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a cylinder, a cylinder head, a piston that defines a combustion chamber with a surrounding wall of the cylinder and the cylinder head, a fuel gas injector, an ignition unit, a scavenging port configured to supply air into the combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a fuel gas injection timing control unit configured to cause the fuel gas injector to inject the fuel gas upon the piston being positioned at 10° to 100° before top dead center in an ascending stroke and to cause the fuel gas injector to inject the fuel gas upon the piston being positioned in vicinity of the top dead center, and an ignition timing control unit configured to ignite the fuel gas inside the combustion chamber upon the piston being positioned in the vicinity of the top dead center. | 02-19-2015 |
| 20090283079 | Air Cleaner For Stratified-Scavenging Two-Stroke Internal Combustion Engine - Object It is intended to prevent intrusion of air-fuel mixture into an air cleaner by blow-back in an air-fuel mixture passage of a stratified-scavenging two-stroke engine. | 11-19-2009 |
| 20110061636 | Two-Stroke Engine - A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air and charge inlet passages are substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially perpendicular to the piston pin. | 03-17-2011 |
| 20090050124 | Two-Cycle Engine - A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved. | 02-26-2009 |
| 20100037874 | TWO-STROKE ENGINE EMISSION CONTROL - A two-stroke internal combustion engine is provided. The engine includes a block defining a crankcase for enclosing a fuel mixture and a cylinder chamber formed at an end of a cylinder bore, an air passage in fluid communication with the cylinder bore, a scavenging transfer passage communicating between the crankcase and the cylinder chamber and having a primary transfer port in communication with a secondary transfer port, the secondary port having a first and a spaced-apart second window with a bridge spanning the space therebetween, and a piston slideably positioned in the cylinder bore and having a channel formed in a periphery of the piston and having a piston opening defined therein for providing selective communication between the crankcase and the transfer passage. | 02-18-2010 |
| 20100037875 | TWO CYCLE ENGINE AND TOOL - The invention provides a two cycle engine which can improve an output by effective scavenging. In a two cycle engine having an exhaust port provided in a side portion of a cylinder, and a scavenge air port provided in the side portion of the cylinder so as to be symmetrical with a plane passing through a center in a cylinder circumference direction of the exhaust port an axis extending to inside of the cylinder, the scavenge air port is structured such that an axis extending to inside of the cylinder from an opening of the scavenge air port in such a direction as to be away from the exhaust port of the cylinder, and is divided in an cylinder axis direction by a dividing portion. | 02-18-2010 |
| 20100288251 | SCAVENGING COVER AND TWO-CYCLE ENGINE - Since a throttle hole for narrowing a scavenging passage is provided on a partition for closing the scavenging passage, the throttle hole of a desired size can be drilled at a desired location on the partition after preparing the scavenging cover having no throttle hole on the partition. Accordingly, the size and location of the throttle hole can be easily changed in conducting a test for finding the most appropriate size and location of the throttle hole, so that the most appropriate size and location of the throttle hole can be easily found. | 11-18-2010 |
| 20110146641 | Internal Combustion Engine - An internal combustion engine has a cylinder with cylinder liner and a reciprocatingly supported piston delimiting a combustion chamber and driving in rotation a crankshaft in a crankcase. A device for supplying fuel and combustion air is provided. At least one transfer passage connects in at least one piston position the crankcase interior with the combustion chamber. The transfer passage has a transfer port that opens into the combustion chamber and an opening that opens into the crankcase. Opening and transfer port are displaced relative to each other in circumferential direction of the cylinder. The cylinder liner has at least one segment of a piston bearing surface and forms at least one wall section of the transfer passage. The cylinder has an upper cylinder segment and a lower cylinder segment that are separately embodied. The cylinder liner is separate from the upper and lower cylinder segments. | 06-23-2011 |
| 20110220074 | STRATIFIED TWO-STROKE ENGINE AND FUEL - Various embodiments include a two-stroke engine and a carburetor for use with gaseous fuel, such as hydrogen, methane, liquid petroleum gas, pure propane, and butane. | 09-15-2011 |
| 20120152216 | TWO-STROKE ENGINE - A two stroke engine comprises a cylinder, in which a combustion chamber bounded by a piston is formed, and an intake passage. A carburetor forms a section of the intake passage, within which a throttle element is mounted pivotably, and at least one main fuel opening and at least one idling fuel opening open into the intake passage, which is divided downstream of the carburetor into an air passage and a mixture passage. The idling fuel opening feeds a secondary passage arranged within the mixture passage. In the idling position, the throttle element may be arranged adjacent to the upstream entry opening in the secondary passage, and the throttle element may have an opening which, in the idling position of the throttle element, is arranged in the region of the entry opening and connects the secondary passage to that region of the intake passage located upstream of the throttle element. | 06-21-2012 |
| 20130228158 | TWO STROKE ENGINE PORTING ARRANGEMENT - A gas transfer port system for a cylinder of a two stroke internal combustion engine; said cylinder provided with a fixed separator plate dividing said cylinder into an upper section and a lower section; a piston in said cylinder reciprocating between said separator plate and a cylinder head; and wherein an annular skirt descending from said separator plate forms at least a portion of an annular well between said skirt and an internal surface of said cylinder; said well sealed at the bottom such that said cylinder is isolated from a crankcase of said engine; said gas transfer port system including at least one long gas transfer port connecting a lower portion of said annular well with a gas transfer port outlet aperture in a wall of said cylinder. | 09-05-2013 |
| 20140216425 | REDUCTION OF RING CLIPPING IN TWO-STROKE CYCLE ENGINES - A port for a cylinder of a two-stroke cycle engine includes at least one generally circumferential array of port openings. Port openings have a shape that reduces ring clipping during engine operation. The port opening shape is defined at a bore surface by opposing top and bottom edges joined by side edges. Each of the top and bottom edges is characterized by rounded corner transitions to the side edges, a rounded peak, and inclined ramp portions extending from the rounded corner transitions to the rounded peak. | 08-07-2014 |
| 20140216426 | TWO-CYCLE ENGINE AND METHOD FOR LUBRICATING TWO-CYCLE ENGINE - The two-cycle engine includes a piston capable of reciprocating along a cylinder, the piston being provided with piston rings; and a lubrication port provided in the cylinder, the lubrication port being used to supply a lubricant to a sliding surface of the cylinder on which the piston rings slide. Inter-ring spaces are provided, each inter-ring space being between adjacent piston rings. In addition, the two-cycle engine includes a controller used to adjust a lubrication period of lubricating from the lubrication port during movement of the piston toward a top dead center thereof, so that a period before an uppermost inter-ring space passing by the lubrication port is excluded from the lubrication period and a period in which at least part of a lowermost inter-ring space faces the lubrication port is included in the lubrication period. | 08-07-2014 |
| 20160097343 | Air Leading-Type Stratified Scavenging Two-Stroke Internal-Combustion Engine - The certainty of supplying air to a scavenging channel through a piston groove is improved. In a cylinder wall | 04-07-2016 |
| 20180023528 | INJECTION SYSTEM FOR TWO-STROKE ENGINES | 01-25-2018 |
| 20110155111 | EXHAUST GAS RECIRCULATION SYSTEM FOR A LOCOMOTIVE TWO-STROKE UNIFLOW SCAVENGED DIESEL ENGINE - A locomotive two-stroke uniflow scavenged diesel engine system including an exhaust gas recirculation (EGR) system is described for reducing NO | 06-30-2011 |
| 20120304972 | TWO-STROKE ENGINE WITH LOW CONSUMPTION AND LOW EMISSIONS - Two-stroke engine ( | 12-06-2012 |
| 20130247885 | TWO-STROKE ENGINE AND FOUR-STROKE ENGINE - A two-stroke engine ( | 09-26-2013 |
| 20080223349 | Stratified scavenging two-stoke cycle engine - A stratified scavenging two-stroke cycle engine with the check valve for introducing scavenging air simplified in construction is provided. The gasket between the flange part forming an air supply chamber and a mixture passage at a side of the cylinder and the passage connecting member having an air flow passage and a mixture flow passage is composed to have an integral leaf valve for allowing air in the air flow passage in the passage connecting member to flow only toward the air supply chamber which is connected to the scavenging passages of the engine so that the gasket has a function as a seal member and that as a check valve. | 09-18-2008 |
| 20100192928 | TWO-STROKE CYCLE COMBUSTION ENGINE OF AIR SCAVENGING TYPE - To provide a two-stroke cycle combustion engine of an air scavenging type, in which not only can transit from the idling condition to the rapid accelerating condition take place smoothly, but the combustion engine can be smoothly started, there are provided scavenging passages ( | 08-05-2010 |
| 20100206279 | METHOD AND APPARATUS FOR OPTIMIZATION OF OPERATION AND SUPPLY OF TWO-STROKE ENDOTHERMIC ENGINES, PARTICULARLY TO BE EMPLOYED IN THE INDUSTRIAL SECTOR RELEVANT TO MICROENGINES IN THE HOBBY-MODELLISTIC FIELD - The invention concerns a method and an apparatus for optimization of operation and supply of two-stroke endothermic engines, particularly to be employed in the industrial sector relevant to micro engines in the hobby-modellistic field, so as to obtain an improvement of known two-stroke endothermic engines with suction by rotating disc valve, thanks to the use of methods permitting obtaining a better general efficiency of engine, thus obtaining lower consumption along with a better volumetric efficiency and a better mechanical efficiency. | 08-19-2010 |
| 20100258098 | Two-Stroke Engine and Related Methods - A two-stroke engine includes a crankshaft that is rotatable about an axis, and an engine block that includes a combustion cylinder and a compression cylinder. A first piston is slidably disposed within the combustion cylinder and is operatively coupled to the crankshaft for reciprocating movement within the combustion cylinder through a power stroke during each rotation of the crankshaft about the axis. A second piston is slidably disposed within the compression cylinder and is operatively coupled to the crankshaft for reciprocating movement within the compression cylinder such that fresh air is received and compressed in the compression cylinder during each rotation of the crankshaft about the axis. A conduit provides fluid communication between the combustion cylinder and the compression cylinder, and a fuel injector is in communication with the combustion cylinder for admitting fuel into the combustion cylinder. | 10-14-2010 |
| 20120227717 | TWO-STROKE ENGINES - A two-stroke, internal combustion engine which includes at least one set of paired first and second cylinders. The engine includes an air or air/fuel mixture inlet conduit bifurcated into inlet passages extending to respective first and second inlet ports of the first and second cylinders. A valve controls the passage of air or air/fuel mixture into the inlet passages. In one embodiment of the engine, a bypass passage provided with a bypass valve extends between the inlet ports of the paired cylinders. | 09-13-2012 |
| 20130327307 | 2-CYCLE ENGINE AND ENGINE-POWERED WORKING MACHINE HAVING THE SAME - A 2-cycle engine has: a piston reciprocably housed in a cylinder bore; an intake opening, an exhaust opening, and a scavenge opening provided in an inner peripheral wall of the cylinder bore and opened/closed by the piston; and a scavenge passage connecting the scavenge opening and a crank chamber. A valve that opens/closes the scavenge passage is provided on the scavenge passage. | 12-12-2013 |
| 20160032793 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE INTERNAL COMBUSTION ENGINE - An exhaust valve assembly for a two-stroke internal combustion engine has a valve actuator having a first pressure chamber and a second pressure chamber, and a valve operatively connected to the valve actuator. The first and second pressure chambers are adapted for selectively receiving one of a first pressure and a second pressure. The first pressure is higher than the second pressure. The valve actuator moves the valve between at least a first valve position and a second valve position. The valve actuator moves the valve to the first valve position when the first pressure is supplied to the first pressure chamber and the second pressure is supplied to the second pressure chamber. The valve actuator moves the valve to the second valve position when the second pressure is supplied to the first pressure chamber and the first pressure is supplied to the second pressure chamber. | 02-04-2016 |
| 123065000 |
Blowers | 1 |
| 20090013979 | RECIPROCATING ENGINE - A reciprocating engine ( | 01-15-2009 |
| 20090013980 | TWO CYCLE ENGINE - Size reduction and pollution reduction are promoted in a two cycle engine. A two cycle engine includes: a cylinder which contains a piston so as to allow reciprocating movement of the piston; a scavenging gas reserving chamber which covers a lower opening of the cylinder so as to seal the lower opening; an intake portion which is provided in the scavenging gas reserving chamber; a scavenging passage which provides communication between the scavenging gas reserving chamber and the cylinder; a connecting rod which is connected to the piston and passes through the scavenging gas reserving chamber; a crank mechanism which allows linear reciprocating movement of the connecting rod; and a sealing portion which is provided in an insertion hole in the scavenging gas reserving chamber through which the connecting rod passes and which allows linear reciprocating movement of the connecting rod but seals the scavenging gas reserving chamber. The two cycle engine may have a structure in which the intake portion has a structure for drawing outside air into the scavenging gas reserving chamber and in which a spraying mechanism for spraying fuel is provided in the cylinder head. | 01-15-2009 |
| 20090013981 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block includes a scavenging passage, which extends between a combustion chamber and a crankcase chamber to communicate them together and has a scavenging port defined in the cylinder block so as to open at an inner peripheral surface of the cylinder block. An intake passage or exhaust passage, the scavenging passage including the scavenging port and a throughhole defined therebetween are formed by the use of a molding piece movable in a direction towards the fuel intake passage or exhaust passage and the throughhole is closed by a lid. | 01-15-2009 |
| 20090013982 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block for the two-cycle combustion engine includes a scavenging port open at an inner peripheral surface of the cylinder block so as to orient diagonally upwardly relative to a longitudinal axis of a cylinder bore and defined in the cylinder block in communication with a combustion chamber. This scavenging port is formed by cutting with the rotary cutting tool, then rotated about its own longitudinal axis, from an inner peripheral surface of the cylinder block. | 01-15-2009 |
| 20090020107 | Two-Stroke Engine, Especially for Landcraft, Watercraft, or Aircraft Models - Disclosed is a two-stroke engine, especially for landcraft, watercraft, or aircraft models, comprising a piston which can be moved up and down within a bush, defines a combination chamber at the top, and is connected to a crankshaft via a con-rod at the bottom, said crankshaft being rotatably mounted in a crank housing located below the bush. In order to reduce friction of the piston in the bush of such a two-stroke engine, the bottom end of the bush, which adjoins the crank housing is provided with means that increase the temperature-related radial expansion of the bush. | 01-22-2009 |
| 20090064975 | TWO-STROKE COMBUSTION ENGINE - A method for the operation of a combustion engine operating in accordance with a two stroke principle, which comprises alternating power stroke and compression strokes, wherein the combustion engine comprises at least one cylinder ( | 03-12-2009 |
| 20090199828 | Air injection engine - An internal combustion engine of the present invention features separate compression and expansion cycles. The engine includes a separate compressor device which pressurizes air by a ratio greater than 15 to 1, at least one two stroke combustion cylinder and a compressed air conduit for transferring compressed air from the compressor to the at least one combustion cylinder. An air injection valve injects the compressed air into the combustion cylinder during the second half portion of the return stroke of the combustion cylinder. The compressed air is mixed with fuel and combusted for expansion during a power stroke. In this engine compression occurs only to a minor degree in the combustion cylinder. Accordingly, the compression ratio of the present engine may be significantly higher or lower than the volumetric expansion ratio of the combustion cylinder thus resulting in corresponding increases in either power density or thermodynamic efficiency respectively. | 08-13-2009 |
| 20090255519 | SILENCER FOR A MOTOR DEVICE - A silencer for a two-stroke engine includes a first chamber and a second chamber, wherein a flow channel is provided between an outlet of a combustion chamber and the first chamber. A high charge degree of the combustion chamber has a pressure ratio in the region of the outlet which reduces or prevents an escape of fresh gas from the combustion chamber. The flow channel between the outlet and the first chamber is flow-favourably shaped in such a manner that the exhaust gas that flows out of the outlet because of its mass inertia predominantly flows into the first chamber and following charging of the first chamber flows back again and as a result a back pressure is formed in the direction of the combustion chamber. | 10-15-2009 |
| 20090277434 | CONTROL STRATEGY FOR MULTI-STROKE ENGINE SYSTEM - An engine system and a method of operation are described. As one example, the method may include: during a first operating condition, operating a cylinder of the engine in a two stroke cycle to combust a first mixture of air and fuel, and adjusting an opening overlap between an intake poppet valve and an exhaust poppet valve of the cylinder to vary a composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve; and during a second operating condition, operating a cylinder of the engine in a four stroke cycle to combust a second mixture of air and fuel, and adjusting a relative amount of fuel contained in the second mixture of air and fuel to vary the composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve. | 11-12-2009 |
| 20100206278 | POWER CUTTER - A power cutter including a two stroke internal combustion engine mounted within a housing and a carburetor for providing aerated fuel for the engine. The carburetor is capable of operating in at least two modes of operation, a first mode when the engine is cold and a second mode when the engine is hot. A temperature sensor is mounted on the engine and provides an engine controller with a signal which is a function of the temperature of the engine; the carburetor comprising an electrically controlled cold start mechanism which switches the carburetor between its two modes of operation, wherein, when the electronic controller determines that the engine is cold, it provides an electrical signal to the electrically controlled cold start mechanism to cause it to change the mode of operation of the carburetor to its first mode. | 08-19-2010 |
| 20100294254 | Inverted cross-scavenged, two-overhead valve, 2-stroke engine - A two-stroke internal combustion engine which has an Inverted Cross-Scavenged operation forming a 180° air and exhaust gas loop and having two overhead valves [ | 11-25-2010 |
| 20100326411 | TWO STROKE ENGINE WITH REGULAR LUBRICATION SYSTEM - This is a novel two-stroke engine design which achieves the best properties of both the two and the four-stroke types of engine. The design has a simple and effective lubrication system, a clean exhaust system, and an increased power to displacement ratio. | 12-30-2010 |
| 20100326412 | Carburetor and Two-Stroke Engine with a Carburetor - A carburetor has a carburetor housing in which an air passage and a mixture passage are disposed. A barrel valve controls the air passage and the mixture passage. The barrel valve has a mixture passage section and an air passage section formed therein. The air passage in at least one position of the barrel valve is closed off at least partially by the barrel valve. The air passage in the at least one position of the barrel valve in which the air passage is at least partially closed off by the barrel valve is connected by a connection within the barrel valve with the mixture passage. An internal combustion engine equipped with such a carburetor exhibits excellent running behavior. | 12-30-2010 |
| 20110061637 | Fuel System - In various embodiments, a metering apparatus may be associated with an engine. The metering apparatus may include a first passageway for transporting air to a first port of an engine, and a second passageway for transporting gaseous fuel to a second port of the engine. | 03-17-2011 |
| 20110303202 | INTERNAL COMBUSTION ENGINE - An internal combustion engine, having at least one cylinder bank, the or each cylinder bank having two outer high pressure cylinders and a central low pressure cylinder, reciprocating pistons of the cylinders being coupled via connecting rods to a crankshaft, the valves of the cylinders being actuated via camshafts which can be driven from the crankshaft, crossflow channels for exhaust gas formed in the region of the or each cylinder bank between outlet valves of the high pressure cylinders and inlet valves of the respective low pressure cylinder, and each crossflow channel and the respective high pressure cylinder of the or each cylinder bank being designed in such a way that a dimensional ratio of a volume of the crossflow channel in cm | 12-15-2011 |
| 20110315132 | Diesel Engine, Predetermined Breaking Component for Diesel Engine as well as Method for Avoiding Damages to a Diesel Engine - The invention concerns a Diesel engine, in particular a two stroke crosshead large Diesel engine comprising at least one combustion chamber, which is enclosed on multiple sides by a cylinder, and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall for the combustion chamber, wherein the combustion chamber on its outer wall presents a predetermined breaking point. The predetermined breaking point is suited to protect the Diesel engine against possible damages which might be caused by an undesirably high overpressure (py) of gases in the combustion chamber during a malfunction of the Diesel engine, wherein the predetermined breaking point comprises a predetermined breaking pressure (ps) below the overpressure (py) above which damages are expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions. A predetermined breaking component comprising the predetermined breaking point, and a method in which for preventing the damages at least one predetermined breaking component is provided in the outer wall of at least one combustion chamber. | 12-29-2011 |
| 20120180769 | Two-Cycle Engine - A two-cycle engine having a structure in which the shaft center C | 07-19-2012 |
| 20120192840 | LOST-MOTION VARIABLE VALVE ACTUATION SYSTEM WITH VALVE DEACTIVATION - Devices and related methods are disclosed that generally involve the selective deactivation of one or more engine valves. In one embodiment, a split-cycle internal combustion engine is provided in which a high-speed trigger valve is used to fill and drain a hydraulic tappet that forms part of a lost-motion system of an engine valve. A spool valve can be used to selectively disconnect the tappet from the trigger valve, thereby deactivating the associated engine valve (i.e., preventing the engine valve from opening). The devices and methods disclosed herein also have application in conventional internal combustion engines and can be used with inwardly-opening and/or outwardly-opening valves. | 08-02-2012 |
| 20120204848 | CRANKSHAFT FOR A TWO-STROKE ENGINE - A crankshaft has a receiving platform for catching lubricant dropping from a main bearing assembly. The receiving platform has at least one wall disposed thereon. The wall has one point that is the furthest from the rotational axis of the crankshaft. One channel is defined in the platform and has an inlet disposed close to the point of the wall that is furthest from the rotational axis of the crankshaft. The channel has an outlet in the vicinity of a connecting rod bearing assembly, so that lubricant dropped on the receiving platform will flow to the connecting rod bearing assembly. | 08-16-2012 |
| 20120298083 | TWO-STROKE HEAVY FUEL ENGINE - A two-stroke internal combustion engine is provided. The two-stroke engine can be integrated into a variety of devices, including for example unmanned aerial vehicles, and can operate on heavy fuels including JP-5 and JP-8, for example. In some embodiments, engine can include a crankshaft including first and second main shaft portions interconnected by an offset crank web. The offset crank web can include opposing end portions that are offset from each other and define spaced apart centerlines generally perpendicular to and coplanar with the crankshaft centerline. In other embodiments, the engine can provide improvements in engine cooling, engine exhaust, lubrication delivery, engine mounting, engine fuel delivery and propeller attachment, for example. | 11-29-2012 |
| 20130228159 | TWO-STROKE ENGINE HAVING AN INTAKE ARRANGEMENT - A two-stroke engine has an intake arrangement including a carburetor. An intake channel divides into a mixture channel and an air channel. An intermediate flange is mounted between the carburetor and the cylinder. This flange has a carburetor connecting surface, which faces toward the carburetor, and a cylinder connecting surface which faces toward the cylinder. Referred to the flow direction in the intake channel, the air channel divides upstream of the cylinder connecting surface into two branches. The first branch has a first longitudinal center axis and the second branch has a second longitudinal center axis. The intersect points of the center axes with the connecting surfaces are mutually connected via an imaginary connecting line in the carburetor connecting surface or the cylinder connecting surface. The two connecting lines conjointly define an angle β in the carburetor connecting surface with this angle being greater than 0°. | 09-05-2013 |
| 20130239933 | TWO-CYCLE ENGINE - A pair of suction-side scavenging ports introduces a working gas containing fuel into a combustion chamber, and the working gases are caused to collide with each other to thereby form a working gas layer in a state of two vortexes rotating in opposite directions to each other, and a pair of exhaust-side scavenging ports introduces a non-working gas having a lower fuel content rate than the working gas into the combustion chamber, and the non-working gases are caused to collide with each other to thereby form a non-working gas layer in a state of one vortex. | 09-19-2013 |
| 20130327306 | ROTARY SYNCHRONOUS CHARGE TRAPPING - An exemplary two-stroke internal combustion engine can comprise one or more cylinders comprising exhaust ports, one or more pistons configured to cyclically cover and uncover the exhaust ports during reciprocation of the pistons within the cylinders, and one or more rotary exhaust valves associated with each exhaust port. The exhaust valves can be configured to rotate around a valve axis that is substantially parallel to an axis of rotation of a crank shaft of the engine. Each exhaust valve at least partially obstructs the associated exhaust port during a portion of the exhaust valve's rotation about the valve axis while the associated exhaust port is at least partially uncovered by the associated piston, thereby trapping fresh charge within the combustion chamber. | 12-12-2013 |
| 20140000574 | MUFFLER AND ENGINE-DRIVEN WORK MACHINE | 01-02-2014 |
| 20140034033 | Pancake engine with overexpansion - The crankshaft is stopped part way through the upstroke by a rotary start stop mechanism. As the piston nears the end of the compression stroke, vertical ridges on the piston, in conjunction with mating vertical ridges in the cylinder head, effectively partition the combustion chamber into multiple combustion chambers. In a spark ignition engine, this allows the compression ratio of a smaller cylinder. For HCCI (homogenoous charge compression ignition) operation, the partitions can be ignited at varying times, somewhat averaging the pressure rise. Expansion proceeds to BDC, providing overexpansion. The exhaust valve(s) open prior to BDC. The upstroke continues to the crankshaft stopping angle. Purge is by poppet valves with the inlet valves generating a swirl about the cylinder axis. Power is varied by varying the frequency of cycles, not by reducing the power per cycle. | 02-06-2014 |
| 20140209078 | Adjusting of Air-Fuel Ratio of a Two-Stroke Internal Combustion Engine - To meet stringent emission standards and improve performance of two-stroke crankcase-scavenged engines, the muffler ( | 07-31-2014 |
| 20140261347 | INTERNAL COMBUSTION ENGINE AND ASSOCIATED SYSTEMS AND METHODS - An internal combustion engine comprising a combustion chamber having a surrounding sidewall with a piston slideably disposed in the surrounding sidewall. A motion conversion mechanism is connected to the piston via a piston rod, and is operative to convert reciprocating motion of the piston into rotary motion. The motion conversion mechanism comprises a cam drum and at least one roller connected to the piston rod. A piston valve including a valve head and a valve stem extends through the piston. The piston valve is moveable between an open position and a closed position to control fluid movement through the flow passage. The valve head is pivotably connected to the valve stem and the engine includes a linkage connected to the valve head that is operative to pivot the valve head between an intake position and an exhaust position. | 09-18-2014 |
| 20150075506 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a piston that defines a main combustion chamber with a surrounding wall of a cylinder and a cylinder head, a fuel gas injector configured to inject fuel gas, a scavenging port that supplies air into the main combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a precombustion chamber cap that defines a precombustion chamber inside thereof, a fuel injection timing control unit configured to inject the fuel gas into the main combustion chamber and to inject the fuel gas into the main combustion chamber upon the piston being positioned in the vicinity of the top dead center, and an ignition timing control unit configured to ignite a mixed air of the fuel gas and the air inside the precombustion chamber upon the piston being positioned in the vicinity of the top dead center. | 03-19-2015 |
| 20150337793 | COMBUSTION IGNITION SYSTEM - Ignition systems, devices, and methods of using a resistive heating element to initiate combustion in internal combustion engines are disclosed. In one embodiment, an ignition system comprises a conductive member having a portion arranged for positioning within a combustion chamber of an internal combustion engine and comprising at least two high-resistance portions separated by a low-resistance portion, the high-resistance portions arranged to reach a temperature sufficient to cause ignition within the engine. In some instances, a conductive member positioned within a combustion chamber and arranged to ignite an air/fuel mixture comprises an inner portion and an outer portion, the inner portion comprising a heat removing portion arranged to remove heat from the outer portion sufficient to prevent pre-ignition. Other embodiments are disclosed. | 11-26-2015 |
| 20160076441 | COMPACT NON-VIBRATING ENDOTHERMIC ENGINE - The Compact Non Vibrating Endothermic Engine (CoNVEE in the following) is an internal combustion engine with reciprocating motion of the pistons, whose innovative architecture makes it more compact, given the same delivered power, with respect to the current state of the art. This happens both because the CoNVEE core occupies a very reduced volume, and also because it does not require the presence of any additional compensation or damping of mechanical vibrations. In fact all the moving parts of the CoNVEE are already internally compensated: they act in perfect anti-symmetry compensating each inertia force developed, excluding, of course, that of the motor shaft which is indispensable for the generation of the useful mechanical energy. The intrinsic compactness of the CoNVEE is made possible by the new and characteristic mechanism adopted for the motion transfer from the pistons to the motor shaft. The CoNVEE may be conveniently used with any type of propulsion fuel and, particularly, for those applications which require high power density and low vibration in the motor. | 03-17-2016 |
| 20160377035 | Air Cleaner For Stratified Scavenging Two-Stroke Internal Combustion Engine - To improve the effect of preventing contamination of an element in an air cleaner. An air cleaner includes a first inlet ( | 12-29-2016 |
| 20080196701 | Two-Stroke Internal Combustion Engine with Enhanced Scavenging - The engine has at least one cylinder ( | 08-21-2008 |
| 20110197866 | METHOD OF OPERATION OF TWO-STROKE FORCED CYLINDER FILLING ENGINE - The invention relates to propulsion engineering, namely to methods of operation of two-stroke engines. The invention makes it possible to increase the power-to-volume ratio of an engine through better cylinder filling and to improve engine performance through the utilization of combustion product energy, while using parts that are easy to produce from inexpensive and readily available materials. The essence of the invention is that a portion of incoming charge is by-passed from a cylinder, during the filling thereof, to an exhaust manifold after the combustion products so that a part of the exhaust manifold is filled. A portion of the combustion products is returned towards the cylinder cavity by fully closing the exhaust manifold with the aid of a valve member, and an incoming charge is pumped from the exhaust manifold to the cylinder cavity via exhaust members by virtue of combustion product energy when the scavenging ports are already closed. | 08-18-2011 |
| 20150114372 | Structures, functions, and methods regarding internal combustion engines - Improved structures, functions, and methods regarding internal combustion engines (ICE's). ICE embodiments disclosed are divided into three groups, all of which have at least one embodiment structurally possessing at least one actively powered fan cooperating with at least one exhaust manifold. All of said embodiments disclosed at least solve the objective technical problem of reducing emissions in an ICE. Said embodiments include both normally aspirated and forced induction ICE's. Said embodiments are capable of operation in two stroke cycle Homogeneous Charge Compression Ignition (HCCI) mode, two stroke cycle spark ignition mode, two stroke cycle combination spark ignition and HCCI mode, or four stroke cycle spark ignition mode. The technical field respecting all embodiments and or their methodologies relates generally to ICE's. Principal uses of the embodiments include enabling the operation of ICE's in the above said various mode or modes. | 04-30-2015 |
| 20080276919 | Piston, A Ring and a Piston Assembly for a Two Cycle Engine - A piston ring ( | 11-13-2008 |
| 20080283029 | Two-stroke internal combustion engine - Disclosed is a two-stroke internal combustion engine comprising a cylinder ( | 11-20-2008 |
| 20100037876 | Two-stroke internal combustion engine with valves for improved fuel efficiency - A two-stroke cycle internal combustion engine has a cylinder with a cylinder head closing off an end of the cylinder, a crankshaft and a piston connecting with the crankshaft to move the piston in a reciprocating movement within the cylinder. Intake and exhaust valves move into and out of a combustion chamber for openings and closures of the valves. A mixture of fuel and air is forced into the cylinder during an open interval of the intake valve beginning in the middle of the upstroke and terminating in a range of 20-60 degrees before top dead center to improve efficiency and choice of fuel by minimizing compressive forces of the piston during the upstroke. Timing of the closure of the intake valve may be delayed automatically with a reduction in crankshaft angular speed. | 02-18-2010 |
| 20120227716 | TWO-STROKE MOTOR WITH IMPROVED SILENCER AND ADAPTED MOTOR MANAGEMENT - In order to further develop a two-stroke motor with a silencer, whereby the silencer has a silencer inlet to which a flow channel connects, and the flow channel is so flow-beneficially designed between the silencer inlet and the first chamber that due to its mass inertia the exhaust gas flowing into the silencer inlet predominantly flows into the first chamber and after filling the first chamber flows back again thereby forming a counter-pressure in the direction of the combustion chamber, so that the above-described drawbacks are prevented, it is proposed to set the ignition time for igniting a fuel-air mixture present in the combustion chamber at an earlier time before the dead centre of a piston defining the combustion chamber in terms of stroke movement, compared with the ignition time of a two-stroke motor operated with a silencer structurally limited to the second chamber. | 09-13-2012 |
| 20140318515 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - An air-leading type, stratified scavenging two-stroke engine. The engine including a cylinder member and a crankcase joined therewith has an intake passage, an exhaust passage, first and second scavenging passages, a communicating portion and an air passage. The intake passage, the exhaust passage and the air passage are formed in the cylinder member. The first and the second scavenging passages each has a cylinder member-side passage and a crankcase-side passage. The cylinder member-side passages of both of the first and the second scavenging passages communicate with each other via the communicating portion. The air passage is connected to the cylinder member-side passage of the first scavenging passage. In the engine, air for pre-scavenging is introduced from the air passage through a check valve into the cylinder member-side passage of the first scavenging passage, and a part of the introduced air flows into the second scavenging passage through the communicating portion. | 10-30-2014 |
| 20150034060 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE ENGINE - An exhaust valve assembly has a valve actuator, a first valve part (FVP) operatively connected to the actuator, a second valve part (SVP), and at least one auxiliary valve operatively connected to the second valve part. When the actuator is in a first position, the FVP is in a fourth position, the SVP is in a seventh position and the at least one auxiliary valve is in a ninth position. When the actuator is in a second position, the FVP is in a fifth position, the SVP is in the seventh position and the at least one auxiliary valve is in the ninth position. When the actuator is in a third position, the FVP is in a sixth position, the SVP is in an eighth position and the at least one auxiliary valve is in a tenth position. The second position is intermediate the first and third positions. | 02-05-2015 |
| 20160032816 | UNIFLOW TWO-STROKE ENGINE - A uniflow two-stroke engine includes: a cylinder receiving a piston such that the piston can reciprocate therein and defining a combustion chamber above the piston; an exhaust port having one end in communication with an upper end portion of the cylinder; a scavenging port having a scavenging orifice at one end, the scavenging orifice being in communication with a lower part of a side portion of the cylinder such that the scavenging port is selectively brought into communication with and shut off from the combustion chamber by the piston; and an exhaust gas recirculation passage having one end in communication with a part of the side portion of the cylinder above the scavenging port and the other end in communication with the scavenging port such that the exhaust gas recirculation passage is selectively brought into communication with and shut off from the combustion chamber by the piston. | 02-04-2016 |
| 20160177812 | METHOD FOR CONTROLLING A TWO-STROKE INTERNAL COMBUSTION ENGINE | 06-23-2016 |
| 20190145308 | TWO-STROKE INTERNAL COMBUSTION ENGINE | 05-16-2019 |
| 20150047620 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a cylinder, a cylinder head, a piston that defines a combustion chamber with a surrounding wall of the cylinder and the cylinder head, a fuel gas injector, an ignition unit, a scavenging port configured to supply air into the combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a fuel gas injection timing control unit configured to cause the fuel gas injector to inject the fuel gas upon the piston being positioned at 10° to 100° before top dead center in an ascending stroke and to cause the fuel gas injector to inject the fuel gas upon the piston being positioned in vicinity of the top dead center, and an ignition timing control unit configured to ignite the fuel gas inside the combustion chamber upon the piston being positioned in the vicinity of the top dead center. | 02-19-2015 |
| 20090283079 | Air Cleaner For Stratified-Scavenging Two-Stroke Internal Combustion Engine - Object It is intended to prevent intrusion of air-fuel mixture into an air cleaner by blow-back in an air-fuel mixture passage of a stratified-scavenging two-stroke engine. | 11-19-2009 |
| 20110061636 | Two-Stroke Engine - A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air and charge inlet passages are substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially perpendicular to the piston pin. | 03-17-2011 |
| 20090050124 | Two-Cycle Engine - A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved. | 02-26-2009 |
| 20100037874 | TWO-STROKE ENGINE EMISSION CONTROL - A two-stroke internal combustion engine is provided. The engine includes a block defining a crankcase for enclosing a fuel mixture and a cylinder chamber formed at an end of a cylinder bore, an air passage in fluid communication with the cylinder bore, a scavenging transfer passage communicating between the crankcase and the cylinder chamber and having a primary transfer port in communication with a secondary transfer port, the secondary port having a first and a spaced-apart second window with a bridge spanning the space therebetween, and a piston slideably positioned in the cylinder bore and having a channel formed in a periphery of the piston and having a piston opening defined therein for providing selective communication between the crankcase and the transfer passage. | 02-18-2010 |
| 20100037875 | TWO CYCLE ENGINE AND TOOL - The invention provides a two cycle engine which can improve an output by effective scavenging. In a two cycle engine having an exhaust port provided in a side portion of a cylinder, and a scavenge air port provided in the side portion of the cylinder so as to be symmetrical with a plane passing through a center in a cylinder circumference direction of the exhaust port an axis extending to inside of the cylinder, the scavenge air port is structured such that an axis extending to inside of the cylinder from an opening of the scavenge air port in such a direction as to be away from the exhaust port of the cylinder, and is divided in an cylinder axis direction by a dividing portion. | 02-18-2010 |
| 20100288251 | SCAVENGING COVER AND TWO-CYCLE ENGINE - Since a throttle hole for narrowing a scavenging passage is provided on a partition for closing the scavenging passage, the throttle hole of a desired size can be drilled at a desired location on the partition after preparing the scavenging cover having no throttle hole on the partition. Accordingly, the size and location of the throttle hole can be easily changed in conducting a test for finding the most appropriate size and location of the throttle hole, so that the most appropriate size and location of the throttle hole can be easily found. | 11-18-2010 |
| 20110146641 | Internal Combustion Engine - An internal combustion engine has a cylinder with cylinder liner and a reciprocatingly supported piston delimiting a combustion chamber and driving in rotation a crankshaft in a crankcase. A device for supplying fuel and combustion air is provided. At least one transfer passage connects in at least one piston position the crankcase interior with the combustion chamber. The transfer passage has a transfer port that opens into the combustion chamber and an opening that opens into the crankcase. Opening and transfer port are displaced relative to each other in circumferential direction of the cylinder. The cylinder liner has at least one segment of a piston bearing surface and forms at least one wall section of the transfer passage. The cylinder has an upper cylinder segment and a lower cylinder segment that are separately embodied. The cylinder liner is separate from the upper and lower cylinder segments. | 06-23-2011 |
| 20110220074 | STRATIFIED TWO-STROKE ENGINE AND FUEL - Various embodiments include a two-stroke engine and a carburetor for use with gaseous fuel, such as hydrogen, methane, liquid petroleum gas, pure propane, and butane. | 09-15-2011 |
| 20120152216 | TWO-STROKE ENGINE - A two stroke engine comprises a cylinder, in which a combustion chamber bounded by a piston is formed, and an intake passage. A carburetor forms a section of the intake passage, within which a throttle element is mounted pivotably, and at least one main fuel opening and at least one idling fuel opening open into the intake passage, which is divided downstream of the carburetor into an air passage and a mixture passage. The idling fuel opening feeds a secondary passage arranged within the mixture passage. In the idling position, the throttle element may be arranged adjacent to the upstream entry opening in the secondary passage, and the throttle element may have an opening which, in the idling position of the throttle element, is arranged in the region of the entry opening and connects the secondary passage to that region of the intake passage located upstream of the throttle element. | 06-21-2012 |
| 20130228158 | TWO STROKE ENGINE PORTING ARRANGEMENT - A gas transfer port system for a cylinder of a two stroke internal combustion engine; said cylinder provided with a fixed separator plate dividing said cylinder into an upper section and a lower section; a piston in said cylinder reciprocating between said separator plate and a cylinder head; and wherein an annular skirt descending from said separator plate forms at least a portion of an annular well between said skirt and an internal surface of said cylinder; said well sealed at the bottom such that said cylinder is isolated from a crankcase of said engine; said gas transfer port system including at least one long gas transfer port connecting a lower portion of said annular well with a gas transfer port outlet aperture in a wall of said cylinder. | 09-05-2013 |
| 20140216425 | REDUCTION OF RING CLIPPING IN TWO-STROKE CYCLE ENGINES - A port for a cylinder of a two-stroke cycle engine includes at least one generally circumferential array of port openings. Port openings have a shape that reduces ring clipping during engine operation. The port opening shape is defined at a bore surface by opposing top and bottom edges joined by side edges. Each of the top and bottom edges is characterized by rounded corner transitions to the side edges, a rounded peak, and inclined ramp portions extending from the rounded corner transitions to the rounded peak. | 08-07-2014 |
| 20140216426 | TWO-CYCLE ENGINE AND METHOD FOR LUBRICATING TWO-CYCLE ENGINE - The two-cycle engine includes a piston capable of reciprocating along a cylinder, the piston being provided with piston rings; and a lubrication port provided in the cylinder, the lubrication port being used to supply a lubricant to a sliding surface of the cylinder on which the piston rings slide. Inter-ring spaces are provided, each inter-ring space being between adjacent piston rings. In addition, the two-cycle engine includes a controller used to adjust a lubrication period of lubricating from the lubrication port during movement of the piston toward a top dead center thereof, so that a period before an uppermost inter-ring space passing by the lubrication port is excluded from the lubrication period and a period in which at least part of a lowermost inter-ring space faces the lubrication port is included in the lubrication period. | 08-07-2014 |
| 20160097343 | Air Leading-Type Stratified Scavenging Two-Stroke Internal-Combustion Engine - The certainty of supplying air to a scavenging channel through a piston groove is improved. In a cylinder wall | 04-07-2016 |
| 20180023528 | INJECTION SYSTEM FOR TWO-STROKE ENGINES | 01-25-2018 |
| 20110155111 | EXHAUST GAS RECIRCULATION SYSTEM FOR A LOCOMOTIVE TWO-STROKE UNIFLOW SCAVENGED DIESEL ENGINE - A locomotive two-stroke uniflow scavenged diesel engine system including an exhaust gas recirculation (EGR) system is described for reducing NO | 06-30-2011 |
| 20120304972 | TWO-STROKE ENGINE WITH LOW CONSUMPTION AND LOW EMISSIONS - Two-stroke engine ( | 12-06-2012 |
| 20130247885 | TWO-STROKE ENGINE AND FOUR-STROKE ENGINE - A two-stroke engine ( | 09-26-2013 |
| 20080223349 | Stratified scavenging two-stoke cycle engine - A stratified scavenging two-stroke cycle engine with the check valve for introducing scavenging air simplified in construction is provided. The gasket between the flange part forming an air supply chamber and a mixture passage at a side of the cylinder and the passage connecting member having an air flow passage and a mixture flow passage is composed to have an integral leaf valve for allowing air in the air flow passage in the passage connecting member to flow only toward the air supply chamber which is connected to the scavenging passages of the engine so that the gasket has a function as a seal member and that as a check valve. | 09-18-2008 |
| 20100192928 | TWO-STROKE CYCLE COMBUSTION ENGINE OF AIR SCAVENGING TYPE - To provide a two-stroke cycle combustion engine of an air scavenging type, in which not only can transit from the idling condition to the rapid accelerating condition take place smoothly, but the combustion engine can be smoothly started, there are provided scavenging passages ( | 08-05-2010 |
| 20100206279 | METHOD AND APPARATUS FOR OPTIMIZATION OF OPERATION AND SUPPLY OF TWO-STROKE ENDOTHERMIC ENGINES, PARTICULARLY TO BE EMPLOYED IN THE INDUSTRIAL SECTOR RELEVANT TO MICROENGINES IN THE HOBBY-MODELLISTIC FIELD - The invention concerns a method and an apparatus for optimization of operation and supply of two-stroke endothermic engines, particularly to be employed in the industrial sector relevant to micro engines in the hobby-modellistic field, so as to obtain an improvement of known two-stroke endothermic engines with suction by rotating disc valve, thanks to the use of methods permitting obtaining a better general efficiency of engine, thus obtaining lower consumption along with a better volumetric efficiency and a better mechanical efficiency. | 08-19-2010 |
| 20100258098 | Two-Stroke Engine and Related Methods - A two-stroke engine includes a crankshaft that is rotatable about an axis, and an engine block that includes a combustion cylinder and a compression cylinder. A first piston is slidably disposed within the combustion cylinder and is operatively coupled to the crankshaft for reciprocating movement within the combustion cylinder through a power stroke during each rotation of the crankshaft about the axis. A second piston is slidably disposed within the compression cylinder and is operatively coupled to the crankshaft for reciprocating movement within the compression cylinder such that fresh air is received and compressed in the compression cylinder during each rotation of the crankshaft about the axis. A conduit provides fluid communication between the combustion cylinder and the compression cylinder, and a fuel injector is in communication with the combustion cylinder for admitting fuel into the combustion cylinder. | 10-14-2010 |
| 20120227717 | TWO-STROKE ENGINES - A two-stroke, internal combustion engine which includes at least one set of paired first and second cylinders. The engine includes an air or air/fuel mixture inlet conduit bifurcated into inlet passages extending to respective first and second inlet ports of the first and second cylinders. A valve controls the passage of air or air/fuel mixture into the inlet passages. In one embodiment of the engine, a bypass passage provided with a bypass valve extends between the inlet ports of the paired cylinders. | 09-13-2012 |
| 20130327307 | 2-CYCLE ENGINE AND ENGINE-POWERED WORKING MACHINE HAVING THE SAME - A 2-cycle engine has: a piston reciprocably housed in a cylinder bore; an intake opening, an exhaust opening, and a scavenge opening provided in an inner peripheral wall of the cylinder bore and opened/closed by the piston; and a scavenge passage connecting the scavenge opening and a crank chamber. A valve that opens/closes the scavenge passage is provided on the scavenge passage. | 12-12-2013 |
| 20160032793 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE INTERNAL COMBUSTION ENGINE - An exhaust valve assembly for a two-stroke internal combustion engine has a valve actuator having a first pressure chamber and a second pressure chamber, and a valve operatively connected to the valve actuator. The first and second pressure chambers are adapted for selectively receiving one of a first pressure and a second pressure. The first pressure is higher than the second pressure. The valve actuator moves the valve between at least a first valve position and a second valve position. The valve actuator moves the valve to the first valve position when the first pressure is supplied to the first pressure chamber and the second pressure is supplied to the second pressure chamber. The valve actuator moves the valve to the second valve position when the second pressure is supplied to the first pressure chamber and the first pressure is supplied to the second pressure chamber. | 02-04-2016 |
| 123065000 |
Inlet and exhaust ports in two or more planes | 1 |
| 20090013979 | RECIPROCATING ENGINE - A reciprocating engine ( | 01-15-2009 |
| 20090013980 | TWO CYCLE ENGINE - Size reduction and pollution reduction are promoted in a two cycle engine. A two cycle engine includes: a cylinder which contains a piston so as to allow reciprocating movement of the piston; a scavenging gas reserving chamber which covers a lower opening of the cylinder so as to seal the lower opening; an intake portion which is provided in the scavenging gas reserving chamber; a scavenging passage which provides communication between the scavenging gas reserving chamber and the cylinder; a connecting rod which is connected to the piston and passes through the scavenging gas reserving chamber; a crank mechanism which allows linear reciprocating movement of the connecting rod; and a sealing portion which is provided in an insertion hole in the scavenging gas reserving chamber through which the connecting rod passes and which allows linear reciprocating movement of the connecting rod but seals the scavenging gas reserving chamber. The two cycle engine may have a structure in which the intake portion has a structure for drawing outside air into the scavenging gas reserving chamber and in which a spraying mechanism for spraying fuel is provided in the cylinder head. | 01-15-2009 |
| 20090013981 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block includes a scavenging passage, which extends between a combustion chamber and a crankcase chamber to communicate them together and has a scavenging port defined in the cylinder block so as to open at an inner peripheral surface of the cylinder block. An intake passage or exhaust passage, the scavenging passage including the scavenging port and a throughhole defined therebetween are formed by the use of a molding piece movable in a direction towards the fuel intake passage or exhaust passage and the throughhole is closed by a lid. | 01-15-2009 |
| 20090013982 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block for the two-cycle combustion engine includes a scavenging port open at an inner peripheral surface of the cylinder block so as to orient diagonally upwardly relative to a longitudinal axis of a cylinder bore and defined in the cylinder block in communication with a combustion chamber. This scavenging port is formed by cutting with the rotary cutting tool, then rotated about its own longitudinal axis, from an inner peripheral surface of the cylinder block. | 01-15-2009 |
| 20090020107 | Two-Stroke Engine, Especially for Landcraft, Watercraft, or Aircraft Models - Disclosed is a two-stroke engine, especially for landcraft, watercraft, or aircraft models, comprising a piston which can be moved up and down within a bush, defines a combination chamber at the top, and is connected to a crankshaft via a con-rod at the bottom, said crankshaft being rotatably mounted in a crank housing located below the bush. In order to reduce friction of the piston in the bush of such a two-stroke engine, the bottom end of the bush, which adjoins the crank housing is provided with means that increase the temperature-related radial expansion of the bush. | 01-22-2009 |
| 20090064975 | TWO-STROKE COMBUSTION ENGINE - A method for the operation of a combustion engine operating in accordance with a two stroke principle, which comprises alternating power stroke and compression strokes, wherein the combustion engine comprises at least one cylinder ( | 03-12-2009 |
| 20090199828 | Air injection engine - An internal combustion engine of the present invention features separate compression and expansion cycles. The engine includes a separate compressor device which pressurizes air by a ratio greater than 15 to 1, at least one two stroke combustion cylinder and a compressed air conduit for transferring compressed air from the compressor to the at least one combustion cylinder. An air injection valve injects the compressed air into the combustion cylinder during the second half portion of the return stroke of the combustion cylinder. The compressed air is mixed with fuel and combusted for expansion during a power stroke. In this engine compression occurs only to a minor degree in the combustion cylinder. Accordingly, the compression ratio of the present engine may be significantly higher or lower than the volumetric expansion ratio of the combustion cylinder thus resulting in corresponding increases in either power density or thermodynamic efficiency respectively. | 08-13-2009 |
| 20090255519 | SILENCER FOR A MOTOR DEVICE - A silencer for a two-stroke engine includes a first chamber and a second chamber, wherein a flow channel is provided between an outlet of a combustion chamber and the first chamber. A high charge degree of the combustion chamber has a pressure ratio in the region of the outlet which reduces or prevents an escape of fresh gas from the combustion chamber. The flow channel between the outlet and the first chamber is flow-favourably shaped in such a manner that the exhaust gas that flows out of the outlet because of its mass inertia predominantly flows into the first chamber and following charging of the first chamber flows back again and as a result a back pressure is formed in the direction of the combustion chamber. | 10-15-2009 |
| 20090277434 | CONTROL STRATEGY FOR MULTI-STROKE ENGINE SYSTEM - An engine system and a method of operation are described. As one example, the method may include: during a first operating condition, operating a cylinder of the engine in a two stroke cycle to combust a first mixture of air and fuel, and adjusting an opening overlap between an intake poppet valve and an exhaust poppet valve of the cylinder to vary a composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve; and during a second operating condition, operating a cylinder of the engine in a four stroke cycle to combust a second mixture of air and fuel, and adjusting a relative amount of fuel contained in the second mixture of air and fuel to vary the composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve. | 11-12-2009 |
| 20100206278 | POWER CUTTER - A power cutter including a two stroke internal combustion engine mounted within a housing and a carburetor for providing aerated fuel for the engine. The carburetor is capable of operating in at least two modes of operation, a first mode when the engine is cold and a second mode when the engine is hot. A temperature sensor is mounted on the engine and provides an engine controller with a signal which is a function of the temperature of the engine; the carburetor comprising an electrically controlled cold start mechanism which switches the carburetor between its two modes of operation, wherein, when the electronic controller determines that the engine is cold, it provides an electrical signal to the electrically controlled cold start mechanism to cause it to change the mode of operation of the carburetor to its first mode. | 08-19-2010 |
| 20100294254 | Inverted cross-scavenged, two-overhead valve, 2-stroke engine - A two-stroke internal combustion engine which has an Inverted Cross-Scavenged operation forming a 180° air and exhaust gas loop and having two overhead valves [ | 11-25-2010 |
| 20100326411 | TWO STROKE ENGINE WITH REGULAR LUBRICATION SYSTEM - This is a novel two-stroke engine design which achieves the best properties of both the two and the four-stroke types of engine. The design has a simple and effective lubrication system, a clean exhaust system, and an increased power to displacement ratio. | 12-30-2010 |
| 20100326412 | Carburetor and Two-Stroke Engine with a Carburetor - A carburetor has a carburetor housing in which an air passage and a mixture passage are disposed. A barrel valve controls the air passage and the mixture passage. The barrel valve has a mixture passage section and an air passage section formed therein. The air passage in at least one position of the barrel valve is closed off at least partially by the barrel valve. The air passage in the at least one position of the barrel valve in which the air passage is at least partially closed off by the barrel valve is connected by a connection within the barrel valve with the mixture passage. An internal combustion engine equipped with such a carburetor exhibits excellent running behavior. | 12-30-2010 |
| 20110061637 | Fuel System - In various embodiments, a metering apparatus may be associated with an engine. The metering apparatus may include a first passageway for transporting air to a first port of an engine, and a second passageway for transporting gaseous fuel to a second port of the engine. | 03-17-2011 |
| 20110303202 | INTERNAL COMBUSTION ENGINE - An internal combustion engine, having at least one cylinder bank, the or each cylinder bank having two outer high pressure cylinders and a central low pressure cylinder, reciprocating pistons of the cylinders being coupled via connecting rods to a crankshaft, the valves of the cylinders being actuated via camshafts which can be driven from the crankshaft, crossflow channels for exhaust gas formed in the region of the or each cylinder bank between outlet valves of the high pressure cylinders and inlet valves of the respective low pressure cylinder, and each crossflow channel and the respective high pressure cylinder of the or each cylinder bank being designed in such a way that a dimensional ratio of a volume of the crossflow channel in cm | 12-15-2011 |
| 20110315132 | Diesel Engine, Predetermined Breaking Component for Diesel Engine as well as Method for Avoiding Damages to a Diesel Engine - The invention concerns a Diesel engine, in particular a two stroke crosshead large Diesel engine comprising at least one combustion chamber, which is enclosed on multiple sides by a cylinder, and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall for the combustion chamber, wherein the combustion chamber on its outer wall presents a predetermined breaking point. The predetermined breaking point is suited to protect the Diesel engine against possible damages which might be caused by an undesirably high overpressure (py) of gases in the combustion chamber during a malfunction of the Diesel engine, wherein the predetermined breaking point comprises a predetermined breaking pressure (ps) below the overpressure (py) above which damages are expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions. A predetermined breaking component comprising the predetermined breaking point, and a method in which for preventing the damages at least one predetermined breaking component is provided in the outer wall of at least one combustion chamber. | 12-29-2011 |
| 20120180769 | Two-Cycle Engine - A two-cycle engine having a structure in which the shaft center C | 07-19-2012 |
| 20120192840 | LOST-MOTION VARIABLE VALVE ACTUATION SYSTEM WITH VALVE DEACTIVATION - Devices and related methods are disclosed that generally involve the selective deactivation of one or more engine valves. In one embodiment, a split-cycle internal combustion engine is provided in which a high-speed trigger valve is used to fill and drain a hydraulic tappet that forms part of a lost-motion system of an engine valve. A spool valve can be used to selectively disconnect the tappet from the trigger valve, thereby deactivating the associated engine valve (i.e., preventing the engine valve from opening). The devices and methods disclosed herein also have application in conventional internal combustion engines and can be used with inwardly-opening and/or outwardly-opening valves. | 08-02-2012 |
| 20120204848 | CRANKSHAFT FOR A TWO-STROKE ENGINE - A crankshaft has a receiving platform for catching lubricant dropping from a main bearing assembly. The receiving platform has at least one wall disposed thereon. The wall has one point that is the furthest from the rotational axis of the crankshaft. One channel is defined in the platform and has an inlet disposed close to the point of the wall that is furthest from the rotational axis of the crankshaft. The channel has an outlet in the vicinity of a connecting rod bearing assembly, so that lubricant dropped on the receiving platform will flow to the connecting rod bearing assembly. | 08-16-2012 |
| 20120298083 | TWO-STROKE HEAVY FUEL ENGINE - A two-stroke internal combustion engine is provided. The two-stroke engine can be integrated into a variety of devices, including for example unmanned aerial vehicles, and can operate on heavy fuels including JP-5 and JP-8, for example. In some embodiments, engine can include a crankshaft including first and second main shaft portions interconnected by an offset crank web. The offset crank web can include opposing end portions that are offset from each other and define spaced apart centerlines generally perpendicular to and coplanar with the crankshaft centerline. In other embodiments, the engine can provide improvements in engine cooling, engine exhaust, lubrication delivery, engine mounting, engine fuel delivery and propeller attachment, for example. | 11-29-2012 |
| 20130228159 | TWO-STROKE ENGINE HAVING AN INTAKE ARRANGEMENT - A two-stroke engine has an intake arrangement including a carburetor. An intake channel divides into a mixture channel and an air channel. An intermediate flange is mounted between the carburetor and the cylinder. This flange has a carburetor connecting surface, which faces toward the carburetor, and a cylinder connecting surface which faces toward the cylinder. Referred to the flow direction in the intake channel, the air channel divides upstream of the cylinder connecting surface into two branches. The first branch has a first longitudinal center axis and the second branch has a second longitudinal center axis. The intersect points of the center axes with the connecting surfaces are mutually connected via an imaginary connecting line in the carburetor connecting surface or the cylinder connecting surface. The two connecting lines conjointly define an angle β in the carburetor connecting surface with this angle being greater than 0°. | 09-05-2013 |
| 20130239933 | TWO-CYCLE ENGINE - A pair of suction-side scavenging ports introduces a working gas containing fuel into a combustion chamber, and the working gases are caused to collide with each other to thereby form a working gas layer in a state of two vortexes rotating in opposite directions to each other, and a pair of exhaust-side scavenging ports introduces a non-working gas having a lower fuel content rate than the working gas into the combustion chamber, and the non-working gases are caused to collide with each other to thereby form a non-working gas layer in a state of one vortex. | 09-19-2013 |
| 20130327306 | ROTARY SYNCHRONOUS CHARGE TRAPPING - An exemplary two-stroke internal combustion engine can comprise one or more cylinders comprising exhaust ports, one or more pistons configured to cyclically cover and uncover the exhaust ports during reciprocation of the pistons within the cylinders, and one or more rotary exhaust valves associated with each exhaust port. The exhaust valves can be configured to rotate around a valve axis that is substantially parallel to an axis of rotation of a crank shaft of the engine. Each exhaust valve at least partially obstructs the associated exhaust port during a portion of the exhaust valve's rotation about the valve axis while the associated exhaust port is at least partially uncovered by the associated piston, thereby trapping fresh charge within the combustion chamber. | 12-12-2013 |
| 20140000574 | MUFFLER AND ENGINE-DRIVEN WORK MACHINE | 01-02-2014 |
| 20140034033 | Pancake engine with overexpansion - The crankshaft is stopped part way through the upstroke by a rotary start stop mechanism. As the piston nears the end of the compression stroke, vertical ridges on the piston, in conjunction with mating vertical ridges in the cylinder head, effectively partition the combustion chamber into multiple combustion chambers. In a spark ignition engine, this allows the compression ratio of a smaller cylinder. For HCCI (homogenoous charge compression ignition) operation, the partitions can be ignited at varying times, somewhat averaging the pressure rise. Expansion proceeds to BDC, providing overexpansion. The exhaust valve(s) open prior to BDC. The upstroke continues to the crankshaft stopping angle. Purge is by poppet valves with the inlet valves generating a swirl about the cylinder axis. Power is varied by varying the frequency of cycles, not by reducing the power per cycle. | 02-06-2014 |
| 20140209078 | Adjusting of Air-Fuel Ratio of a Two-Stroke Internal Combustion Engine - To meet stringent emission standards and improve performance of two-stroke crankcase-scavenged engines, the muffler ( | 07-31-2014 |
| 20140261347 | INTERNAL COMBUSTION ENGINE AND ASSOCIATED SYSTEMS AND METHODS - An internal combustion engine comprising a combustion chamber having a surrounding sidewall with a piston slideably disposed in the surrounding sidewall. A motion conversion mechanism is connected to the piston via a piston rod, and is operative to convert reciprocating motion of the piston into rotary motion. The motion conversion mechanism comprises a cam drum and at least one roller connected to the piston rod. A piston valve including a valve head and a valve stem extends through the piston. The piston valve is moveable between an open position and a closed position to control fluid movement through the flow passage. The valve head is pivotably connected to the valve stem and the engine includes a linkage connected to the valve head that is operative to pivot the valve head between an intake position and an exhaust position. | 09-18-2014 |
| 20150075506 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a piston that defines a main combustion chamber with a surrounding wall of a cylinder and a cylinder head, a fuel gas injector configured to inject fuel gas, a scavenging port that supplies air into the main combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a precombustion chamber cap that defines a precombustion chamber inside thereof, a fuel injection timing control unit configured to inject the fuel gas into the main combustion chamber and to inject the fuel gas into the main combustion chamber upon the piston being positioned in the vicinity of the top dead center, and an ignition timing control unit configured to ignite a mixed air of the fuel gas and the air inside the precombustion chamber upon the piston being positioned in the vicinity of the top dead center. | 03-19-2015 |
| 20150337793 | COMBUSTION IGNITION SYSTEM - Ignition systems, devices, and methods of using a resistive heating element to initiate combustion in internal combustion engines are disclosed. In one embodiment, an ignition system comprises a conductive member having a portion arranged for positioning within a combustion chamber of an internal combustion engine and comprising at least two high-resistance portions separated by a low-resistance portion, the high-resistance portions arranged to reach a temperature sufficient to cause ignition within the engine. In some instances, a conductive member positioned within a combustion chamber and arranged to ignite an air/fuel mixture comprises an inner portion and an outer portion, the inner portion comprising a heat removing portion arranged to remove heat from the outer portion sufficient to prevent pre-ignition. Other embodiments are disclosed. | 11-26-2015 |
| 20160076441 | COMPACT NON-VIBRATING ENDOTHERMIC ENGINE - The Compact Non Vibrating Endothermic Engine (CoNVEE in the following) is an internal combustion engine with reciprocating motion of the pistons, whose innovative architecture makes it more compact, given the same delivered power, with respect to the current state of the art. This happens both because the CoNVEE core occupies a very reduced volume, and also because it does not require the presence of any additional compensation or damping of mechanical vibrations. In fact all the moving parts of the CoNVEE are already internally compensated: they act in perfect anti-symmetry compensating each inertia force developed, excluding, of course, that of the motor shaft which is indispensable for the generation of the useful mechanical energy. The intrinsic compactness of the CoNVEE is made possible by the new and characteristic mechanism adopted for the motion transfer from the pistons to the motor shaft. The CoNVEE may be conveniently used with any type of propulsion fuel and, particularly, for those applications which require high power density and low vibration in the motor. | 03-17-2016 |
| 20160377035 | Air Cleaner For Stratified Scavenging Two-Stroke Internal Combustion Engine - To improve the effect of preventing contamination of an element in an air cleaner. An air cleaner includes a first inlet ( | 12-29-2016 |
| 20080196701 | Two-Stroke Internal Combustion Engine with Enhanced Scavenging - The engine has at least one cylinder ( | 08-21-2008 |
| 20110197866 | METHOD OF OPERATION OF TWO-STROKE FORCED CYLINDER FILLING ENGINE - The invention relates to propulsion engineering, namely to methods of operation of two-stroke engines. The invention makes it possible to increase the power-to-volume ratio of an engine through better cylinder filling and to improve engine performance through the utilization of combustion product energy, while using parts that are easy to produce from inexpensive and readily available materials. The essence of the invention is that a portion of incoming charge is by-passed from a cylinder, during the filling thereof, to an exhaust manifold after the combustion products so that a part of the exhaust manifold is filled. A portion of the combustion products is returned towards the cylinder cavity by fully closing the exhaust manifold with the aid of a valve member, and an incoming charge is pumped from the exhaust manifold to the cylinder cavity via exhaust members by virtue of combustion product energy when the scavenging ports are already closed. | 08-18-2011 |
| 20150114372 | Structures, functions, and methods regarding internal combustion engines - Improved structures, functions, and methods regarding internal combustion engines (ICE's). ICE embodiments disclosed are divided into three groups, all of which have at least one embodiment structurally possessing at least one actively powered fan cooperating with at least one exhaust manifold. All of said embodiments disclosed at least solve the objective technical problem of reducing emissions in an ICE. Said embodiments include both normally aspirated and forced induction ICE's. Said embodiments are capable of operation in two stroke cycle Homogeneous Charge Compression Ignition (HCCI) mode, two stroke cycle spark ignition mode, two stroke cycle combination spark ignition and HCCI mode, or four stroke cycle spark ignition mode. The technical field respecting all embodiments and or their methodologies relates generally to ICE's. Principal uses of the embodiments include enabling the operation of ICE's in the above said various mode or modes. | 04-30-2015 |
| 20080276919 | Piston, A Ring and a Piston Assembly for a Two Cycle Engine - A piston ring ( | 11-13-2008 |
| 20080283029 | Two-stroke internal combustion engine - Disclosed is a two-stroke internal combustion engine comprising a cylinder ( | 11-20-2008 |
| 20100037876 | Two-stroke internal combustion engine with valves for improved fuel efficiency - A two-stroke cycle internal combustion engine has a cylinder with a cylinder head closing off an end of the cylinder, a crankshaft and a piston connecting with the crankshaft to move the piston in a reciprocating movement within the cylinder. Intake and exhaust valves move into and out of a combustion chamber for openings and closures of the valves. A mixture of fuel and air is forced into the cylinder during an open interval of the intake valve beginning in the middle of the upstroke and terminating in a range of 20-60 degrees before top dead center to improve efficiency and choice of fuel by minimizing compressive forces of the piston during the upstroke. Timing of the closure of the intake valve may be delayed automatically with a reduction in crankshaft angular speed. | 02-18-2010 |
| 20120227716 | TWO-STROKE MOTOR WITH IMPROVED SILENCER AND ADAPTED MOTOR MANAGEMENT - In order to further develop a two-stroke motor with a silencer, whereby the silencer has a silencer inlet to which a flow channel connects, and the flow channel is so flow-beneficially designed between the silencer inlet and the first chamber that due to its mass inertia the exhaust gas flowing into the silencer inlet predominantly flows into the first chamber and after filling the first chamber flows back again thereby forming a counter-pressure in the direction of the combustion chamber, so that the above-described drawbacks are prevented, it is proposed to set the ignition time for igniting a fuel-air mixture present in the combustion chamber at an earlier time before the dead centre of a piston defining the combustion chamber in terms of stroke movement, compared with the ignition time of a two-stroke motor operated with a silencer structurally limited to the second chamber. | 09-13-2012 |
| 20140318515 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - An air-leading type, stratified scavenging two-stroke engine. The engine including a cylinder member and a crankcase joined therewith has an intake passage, an exhaust passage, first and second scavenging passages, a communicating portion and an air passage. The intake passage, the exhaust passage and the air passage are formed in the cylinder member. The first and the second scavenging passages each has a cylinder member-side passage and a crankcase-side passage. The cylinder member-side passages of both of the first and the second scavenging passages communicate with each other via the communicating portion. The air passage is connected to the cylinder member-side passage of the first scavenging passage. In the engine, air for pre-scavenging is introduced from the air passage through a check valve into the cylinder member-side passage of the first scavenging passage, and a part of the introduced air flows into the second scavenging passage through the communicating portion. | 10-30-2014 |
| 20150034060 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE ENGINE - An exhaust valve assembly has a valve actuator, a first valve part (FVP) operatively connected to the actuator, a second valve part (SVP), and at least one auxiliary valve operatively connected to the second valve part. When the actuator is in a first position, the FVP is in a fourth position, the SVP is in a seventh position and the at least one auxiliary valve is in a ninth position. When the actuator is in a second position, the FVP is in a fifth position, the SVP is in the seventh position and the at least one auxiliary valve is in the ninth position. When the actuator is in a third position, the FVP is in a sixth position, the SVP is in an eighth position and the at least one auxiliary valve is in a tenth position. The second position is intermediate the first and third positions. | 02-05-2015 |
| 20160032816 | UNIFLOW TWO-STROKE ENGINE - A uniflow two-stroke engine includes: a cylinder receiving a piston such that the piston can reciprocate therein and defining a combustion chamber above the piston; an exhaust port having one end in communication with an upper end portion of the cylinder; a scavenging port having a scavenging orifice at one end, the scavenging orifice being in communication with a lower part of a side portion of the cylinder such that the scavenging port is selectively brought into communication with and shut off from the combustion chamber by the piston; and an exhaust gas recirculation passage having one end in communication with a part of the side portion of the cylinder above the scavenging port and the other end in communication with the scavenging port such that the exhaust gas recirculation passage is selectively brought into communication with and shut off from the combustion chamber by the piston. | 02-04-2016 |
| 20160177812 | METHOD FOR CONTROLLING A TWO-STROKE INTERNAL COMBUSTION ENGINE | 06-23-2016 |
| 20190145308 | TWO-STROKE INTERNAL COMBUSTION ENGINE | 05-16-2019 |
| 20150047620 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a cylinder, a cylinder head, a piston that defines a combustion chamber with a surrounding wall of the cylinder and the cylinder head, a fuel gas injector, an ignition unit, a scavenging port configured to supply air into the combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a fuel gas injection timing control unit configured to cause the fuel gas injector to inject the fuel gas upon the piston being positioned at 10° to 100° before top dead center in an ascending stroke and to cause the fuel gas injector to inject the fuel gas upon the piston being positioned in vicinity of the top dead center, and an ignition timing control unit configured to ignite the fuel gas inside the combustion chamber upon the piston being positioned in the vicinity of the top dead center. | 02-19-2015 |
| 20090283079 | Air Cleaner For Stratified-Scavenging Two-Stroke Internal Combustion Engine - Object It is intended to prevent intrusion of air-fuel mixture into an air cleaner by blow-back in an air-fuel mixture passage of a stratified-scavenging two-stroke engine. | 11-19-2009 |
| 20110061636 | Two-Stroke Engine - A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air and charge inlet passages are substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially perpendicular to the piston pin. | 03-17-2011 |
| 20090050124 | Two-Cycle Engine - A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved. | 02-26-2009 |
| 20100037874 | TWO-STROKE ENGINE EMISSION CONTROL - A two-stroke internal combustion engine is provided. The engine includes a block defining a crankcase for enclosing a fuel mixture and a cylinder chamber formed at an end of a cylinder bore, an air passage in fluid communication with the cylinder bore, a scavenging transfer passage communicating between the crankcase and the cylinder chamber and having a primary transfer port in communication with a secondary transfer port, the secondary port having a first and a spaced-apart second window with a bridge spanning the space therebetween, and a piston slideably positioned in the cylinder bore and having a channel formed in a periphery of the piston and having a piston opening defined therein for providing selective communication between the crankcase and the transfer passage. | 02-18-2010 |
| 20100037875 | TWO CYCLE ENGINE AND TOOL - The invention provides a two cycle engine which can improve an output by effective scavenging. In a two cycle engine having an exhaust port provided in a side portion of a cylinder, and a scavenge air port provided in the side portion of the cylinder so as to be symmetrical with a plane passing through a center in a cylinder circumference direction of the exhaust port an axis extending to inside of the cylinder, the scavenge air port is structured such that an axis extending to inside of the cylinder from an opening of the scavenge air port in such a direction as to be away from the exhaust port of the cylinder, and is divided in an cylinder axis direction by a dividing portion. | 02-18-2010 |
| 20100288251 | SCAVENGING COVER AND TWO-CYCLE ENGINE - Since a throttle hole for narrowing a scavenging passage is provided on a partition for closing the scavenging passage, the throttle hole of a desired size can be drilled at a desired location on the partition after preparing the scavenging cover having no throttle hole on the partition. Accordingly, the size and location of the throttle hole can be easily changed in conducting a test for finding the most appropriate size and location of the throttle hole, so that the most appropriate size and location of the throttle hole can be easily found. | 11-18-2010 |
| 20110146641 | Internal Combustion Engine - An internal combustion engine has a cylinder with cylinder liner and a reciprocatingly supported piston delimiting a combustion chamber and driving in rotation a crankshaft in a crankcase. A device for supplying fuel and combustion air is provided. At least one transfer passage connects in at least one piston position the crankcase interior with the combustion chamber. The transfer passage has a transfer port that opens into the combustion chamber and an opening that opens into the crankcase. Opening and transfer port are displaced relative to each other in circumferential direction of the cylinder. The cylinder liner has at least one segment of a piston bearing surface and forms at least one wall section of the transfer passage. The cylinder has an upper cylinder segment and a lower cylinder segment that are separately embodied. The cylinder liner is separate from the upper and lower cylinder segments. | 06-23-2011 |
| 20110220074 | STRATIFIED TWO-STROKE ENGINE AND FUEL - Various embodiments include a two-stroke engine and a carburetor for use with gaseous fuel, such as hydrogen, methane, liquid petroleum gas, pure propane, and butane. | 09-15-2011 |
| 20120152216 | TWO-STROKE ENGINE - A two stroke engine comprises a cylinder, in which a combustion chamber bounded by a piston is formed, and an intake passage. A carburetor forms a section of the intake passage, within which a throttle element is mounted pivotably, and at least one main fuel opening and at least one idling fuel opening open into the intake passage, which is divided downstream of the carburetor into an air passage and a mixture passage. The idling fuel opening feeds a secondary passage arranged within the mixture passage. In the idling position, the throttle element may be arranged adjacent to the upstream entry opening in the secondary passage, and the throttle element may have an opening which, in the idling position of the throttle element, is arranged in the region of the entry opening and connects the secondary passage to that region of the intake passage located upstream of the throttle element. | 06-21-2012 |
| 20130228158 | TWO STROKE ENGINE PORTING ARRANGEMENT - A gas transfer port system for a cylinder of a two stroke internal combustion engine; said cylinder provided with a fixed separator plate dividing said cylinder into an upper section and a lower section; a piston in said cylinder reciprocating between said separator plate and a cylinder head; and wherein an annular skirt descending from said separator plate forms at least a portion of an annular well between said skirt and an internal surface of said cylinder; said well sealed at the bottom such that said cylinder is isolated from a crankcase of said engine; said gas transfer port system including at least one long gas transfer port connecting a lower portion of said annular well with a gas transfer port outlet aperture in a wall of said cylinder. | 09-05-2013 |
| 20140216425 | REDUCTION OF RING CLIPPING IN TWO-STROKE CYCLE ENGINES - A port for a cylinder of a two-stroke cycle engine includes at least one generally circumferential array of port openings. Port openings have a shape that reduces ring clipping during engine operation. The port opening shape is defined at a bore surface by opposing top and bottom edges joined by side edges. Each of the top and bottom edges is characterized by rounded corner transitions to the side edges, a rounded peak, and inclined ramp portions extending from the rounded corner transitions to the rounded peak. | 08-07-2014 |
| 20140216426 | TWO-CYCLE ENGINE AND METHOD FOR LUBRICATING TWO-CYCLE ENGINE - The two-cycle engine includes a piston capable of reciprocating along a cylinder, the piston being provided with piston rings; and a lubrication port provided in the cylinder, the lubrication port being used to supply a lubricant to a sliding surface of the cylinder on which the piston rings slide. Inter-ring spaces are provided, each inter-ring space being between adjacent piston rings. In addition, the two-cycle engine includes a controller used to adjust a lubrication period of lubricating from the lubrication port during movement of the piston toward a top dead center thereof, so that a period before an uppermost inter-ring space passing by the lubrication port is excluded from the lubrication period and a period in which at least part of a lowermost inter-ring space faces the lubrication port is included in the lubrication period. | 08-07-2014 |
| 20160097343 | Air Leading-Type Stratified Scavenging Two-Stroke Internal-Combustion Engine - The certainty of supplying air to a scavenging channel through a piston groove is improved. In a cylinder wall | 04-07-2016 |
| 20180023528 | INJECTION SYSTEM FOR TWO-STROKE ENGINES | 01-25-2018 |
| 20110155111 | EXHAUST GAS RECIRCULATION SYSTEM FOR A LOCOMOTIVE TWO-STROKE UNIFLOW SCAVENGED DIESEL ENGINE - A locomotive two-stroke uniflow scavenged diesel engine system including an exhaust gas recirculation (EGR) system is described for reducing NO | 06-30-2011 |
| 20120304972 | TWO-STROKE ENGINE WITH LOW CONSUMPTION AND LOW EMISSIONS - Two-stroke engine ( | 12-06-2012 |
| 20130247885 | TWO-STROKE ENGINE AND FOUR-STROKE ENGINE - A two-stroke engine ( | 09-26-2013 |
| 20080223349 | Stratified scavenging two-stoke cycle engine - A stratified scavenging two-stroke cycle engine with the check valve for introducing scavenging air simplified in construction is provided. The gasket between the flange part forming an air supply chamber and a mixture passage at a side of the cylinder and the passage connecting member having an air flow passage and a mixture flow passage is composed to have an integral leaf valve for allowing air in the air flow passage in the passage connecting member to flow only toward the air supply chamber which is connected to the scavenging passages of the engine so that the gasket has a function as a seal member and that as a check valve. | 09-18-2008 |
| 20100192928 | TWO-STROKE CYCLE COMBUSTION ENGINE OF AIR SCAVENGING TYPE - To provide a two-stroke cycle combustion engine of an air scavenging type, in which not only can transit from the idling condition to the rapid accelerating condition take place smoothly, but the combustion engine can be smoothly started, there are provided scavenging passages ( | 08-05-2010 |
| 20100206279 | METHOD AND APPARATUS FOR OPTIMIZATION OF OPERATION AND SUPPLY OF TWO-STROKE ENDOTHERMIC ENGINES, PARTICULARLY TO BE EMPLOYED IN THE INDUSTRIAL SECTOR RELEVANT TO MICROENGINES IN THE HOBBY-MODELLISTIC FIELD - The invention concerns a method and an apparatus for optimization of operation and supply of two-stroke endothermic engines, particularly to be employed in the industrial sector relevant to micro engines in the hobby-modellistic field, so as to obtain an improvement of known two-stroke endothermic engines with suction by rotating disc valve, thanks to the use of methods permitting obtaining a better general efficiency of engine, thus obtaining lower consumption along with a better volumetric efficiency and a better mechanical efficiency. | 08-19-2010 |
| 20100258098 | Two-Stroke Engine and Related Methods - A two-stroke engine includes a crankshaft that is rotatable about an axis, and an engine block that includes a combustion cylinder and a compression cylinder. A first piston is slidably disposed within the combustion cylinder and is operatively coupled to the crankshaft for reciprocating movement within the combustion cylinder through a power stroke during each rotation of the crankshaft about the axis. A second piston is slidably disposed within the compression cylinder and is operatively coupled to the crankshaft for reciprocating movement within the compression cylinder such that fresh air is received and compressed in the compression cylinder during each rotation of the crankshaft about the axis. A conduit provides fluid communication between the combustion cylinder and the compression cylinder, and a fuel injector is in communication with the combustion cylinder for admitting fuel into the combustion cylinder. | 10-14-2010 |
| 20120227717 | TWO-STROKE ENGINES - A two-stroke, internal combustion engine which includes at least one set of paired first and second cylinders. The engine includes an air or air/fuel mixture inlet conduit bifurcated into inlet passages extending to respective first and second inlet ports of the first and second cylinders. A valve controls the passage of air or air/fuel mixture into the inlet passages. In one embodiment of the engine, a bypass passage provided with a bypass valve extends between the inlet ports of the paired cylinders. | 09-13-2012 |
| 20130327307 | 2-CYCLE ENGINE AND ENGINE-POWERED WORKING MACHINE HAVING THE SAME - A 2-cycle engine has: a piston reciprocably housed in a cylinder bore; an intake opening, an exhaust opening, and a scavenge opening provided in an inner peripheral wall of the cylinder bore and opened/closed by the piston; and a scavenge passage connecting the scavenge opening and a crank chamber. A valve that opens/closes the scavenge passage is provided on the scavenge passage. | 12-12-2013 |
| 20160032793 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE INTERNAL COMBUSTION ENGINE - An exhaust valve assembly for a two-stroke internal combustion engine has a valve actuator having a first pressure chamber and a second pressure chamber, and a valve operatively connected to the valve actuator. The first and second pressure chambers are adapted for selectively receiving one of a first pressure and a second pressure. The first pressure is higher than the second pressure. The valve actuator moves the valve between at least a first valve position and a second valve position. The valve actuator moves the valve to the first valve position when the first pressure is supplied to the first pressure chamber and the second pressure is supplied to the second pressure chamber. The valve actuator moves the valve to the second valve position when the second pressure is supplied to the first pressure chamber and the first pressure is supplied to the second pressure chamber. | 02-04-2016 |
| 123065000 |
Intake and exhaust valve in top of cylinder | 1 |
| 20090013979 | RECIPROCATING ENGINE - A reciprocating engine ( | 01-15-2009 |
| 20090013980 | TWO CYCLE ENGINE - Size reduction and pollution reduction are promoted in a two cycle engine. A two cycle engine includes: a cylinder which contains a piston so as to allow reciprocating movement of the piston; a scavenging gas reserving chamber which covers a lower opening of the cylinder so as to seal the lower opening; an intake portion which is provided in the scavenging gas reserving chamber; a scavenging passage which provides communication between the scavenging gas reserving chamber and the cylinder; a connecting rod which is connected to the piston and passes through the scavenging gas reserving chamber; a crank mechanism which allows linear reciprocating movement of the connecting rod; and a sealing portion which is provided in an insertion hole in the scavenging gas reserving chamber through which the connecting rod passes and which allows linear reciprocating movement of the connecting rod but seals the scavenging gas reserving chamber. The two cycle engine may have a structure in which the intake portion has a structure for drawing outside air into the scavenging gas reserving chamber and in which a spraying mechanism for spraying fuel is provided in the cylinder head. | 01-15-2009 |
| 20090013981 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block includes a scavenging passage, which extends between a combustion chamber and a crankcase chamber to communicate them together and has a scavenging port defined in the cylinder block so as to open at an inner peripheral surface of the cylinder block. An intake passage or exhaust passage, the scavenging passage including the scavenging port and a throughhole defined therebetween are formed by the use of a molding piece movable in a direction towards the fuel intake passage or exhaust passage and the throughhole is closed by a lid. | 01-15-2009 |
| 20090013982 | Two-cycle engine cylinder and method for manufacturing the same - A cylinder block for the two-cycle combustion engine includes a scavenging port open at an inner peripheral surface of the cylinder block so as to orient diagonally upwardly relative to a longitudinal axis of a cylinder bore and defined in the cylinder block in communication with a combustion chamber. This scavenging port is formed by cutting with the rotary cutting tool, then rotated about its own longitudinal axis, from an inner peripheral surface of the cylinder block. | 01-15-2009 |
| 20090020107 | Two-Stroke Engine, Especially for Landcraft, Watercraft, or Aircraft Models - Disclosed is a two-stroke engine, especially for landcraft, watercraft, or aircraft models, comprising a piston which can be moved up and down within a bush, defines a combination chamber at the top, and is connected to a crankshaft via a con-rod at the bottom, said crankshaft being rotatably mounted in a crank housing located below the bush. In order to reduce friction of the piston in the bush of such a two-stroke engine, the bottom end of the bush, which adjoins the crank housing is provided with means that increase the temperature-related radial expansion of the bush. | 01-22-2009 |
| 20090064975 | TWO-STROKE COMBUSTION ENGINE - A method for the operation of a combustion engine operating in accordance with a two stroke principle, which comprises alternating power stroke and compression strokes, wherein the combustion engine comprises at least one cylinder ( | 03-12-2009 |
| 20090199828 | Air injection engine - An internal combustion engine of the present invention features separate compression and expansion cycles. The engine includes a separate compressor device which pressurizes air by a ratio greater than 15 to 1, at least one two stroke combustion cylinder and a compressed air conduit for transferring compressed air from the compressor to the at least one combustion cylinder. An air injection valve injects the compressed air into the combustion cylinder during the second half portion of the return stroke of the combustion cylinder. The compressed air is mixed with fuel and combusted for expansion during a power stroke. In this engine compression occurs only to a minor degree in the combustion cylinder. Accordingly, the compression ratio of the present engine may be significantly higher or lower than the volumetric expansion ratio of the combustion cylinder thus resulting in corresponding increases in either power density or thermodynamic efficiency respectively. | 08-13-2009 |
| 20090255519 | SILENCER FOR A MOTOR DEVICE - A silencer for a two-stroke engine includes a first chamber and a second chamber, wherein a flow channel is provided between an outlet of a combustion chamber and the first chamber. A high charge degree of the combustion chamber has a pressure ratio in the region of the outlet which reduces or prevents an escape of fresh gas from the combustion chamber. The flow channel between the outlet and the first chamber is flow-favourably shaped in such a manner that the exhaust gas that flows out of the outlet because of its mass inertia predominantly flows into the first chamber and following charging of the first chamber flows back again and as a result a back pressure is formed in the direction of the combustion chamber. | 10-15-2009 |
| 20090277434 | CONTROL STRATEGY FOR MULTI-STROKE ENGINE SYSTEM - An engine system and a method of operation are described. As one example, the method may include: during a first operating condition, operating a cylinder of the engine in a two stroke cycle to combust a first mixture of air and fuel, and adjusting an opening overlap between an intake poppet valve and an exhaust poppet valve of the cylinder to vary a composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve; and during a second operating condition, operating a cylinder of the engine in a four stroke cycle to combust a second mixture of air and fuel, and adjusting a relative amount of fuel contained in the second mixture of air and fuel to vary the composition of exhaust gases exhausted by the cylinder via the exhaust poppet valve. | 11-12-2009 |
| 20100206278 | POWER CUTTER - A power cutter including a two stroke internal combustion engine mounted within a housing and a carburetor for providing aerated fuel for the engine. The carburetor is capable of operating in at least two modes of operation, a first mode when the engine is cold and a second mode when the engine is hot. A temperature sensor is mounted on the engine and provides an engine controller with a signal which is a function of the temperature of the engine; the carburetor comprising an electrically controlled cold start mechanism which switches the carburetor between its two modes of operation, wherein, when the electronic controller determines that the engine is cold, it provides an electrical signal to the electrically controlled cold start mechanism to cause it to change the mode of operation of the carburetor to its first mode. | 08-19-2010 |
| 20100294254 | Inverted cross-scavenged, two-overhead valve, 2-stroke engine - A two-stroke internal combustion engine which has an Inverted Cross-Scavenged operation forming a 180° air and exhaust gas loop and having two overhead valves [ | 11-25-2010 |
| 20100326411 | TWO STROKE ENGINE WITH REGULAR LUBRICATION SYSTEM - This is a novel two-stroke engine design which achieves the best properties of both the two and the four-stroke types of engine. The design has a simple and effective lubrication system, a clean exhaust system, and an increased power to displacement ratio. | 12-30-2010 |
| 20100326412 | Carburetor and Two-Stroke Engine with a Carburetor - A carburetor has a carburetor housing in which an air passage and a mixture passage are disposed. A barrel valve controls the air passage and the mixture passage. The barrel valve has a mixture passage section and an air passage section formed therein. The air passage in at least one position of the barrel valve is closed off at least partially by the barrel valve. The air passage in the at least one position of the barrel valve in which the air passage is at least partially closed off by the barrel valve is connected by a connection within the barrel valve with the mixture passage. An internal combustion engine equipped with such a carburetor exhibits excellent running behavior. | 12-30-2010 |
| 20110061637 | Fuel System - In various embodiments, a metering apparatus may be associated with an engine. The metering apparatus may include a first passageway for transporting air to a first port of an engine, and a second passageway for transporting gaseous fuel to a second port of the engine. | 03-17-2011 |
| 20110303202 | INTERNAL COMBUSTION ENGINE - An internal combustion engine, having at least one cylinder bank, the or each cylinder bank having two outer high pressure cylinders and a central low pressure cylinder, reciprocating pistons of the cylinders being coupled via connecting rods to a crankshaft, the valves of the cylinders being actuated via camshafts which can be driven from the crankshaft, crossflow channels for exhaust gas formed in the region of the or each cylinder bank between outlet valves of the high pressure cylinders and inlet valves of the respective low pressure cylinder, and each crossflow channel and the respective high pressure cylinder of the or each cylinder bank being designed in such a way that a dimensional ratio of a volume of the crossflow channel in cm | 12-15-2011 |
| 20110315132 | Diesel Engine, Predetermined Breaking Component for Diesel Engine as well as Method for Avoiding Damages to a Diesel Engine - The invention concerns a Diesel engine, in particular a two stroke crosshead large Diesel engine comprising at least one combustion chamber, which is enclosed on multiple sides by a cylinder, and by at least one upper side of at least one piston moving up and down in the cylinder, which form an outer wall for the combustion chamber, wherein the combustion chamber on its outer wall presents a predetermined breaking point. The predetermined breaking point is suited to protect the Diesel engine against possible damages which might be caused by an undesirably high overpressure (py) of gases in the combustion chamber during a malfunction of the Diesel engine, wherein the predetermined breaking point comprises a predetermined breaking pressure (ps) below the overpressure (py) above which damages are expected, and above a combustion chamber normal pressure (pn) provided at a maximum during normal engine operation conditions. A predetermined breaking component comprising the predetermined breaking point, and a method in which for preventing the damages at least one predetermined breaking component is provided in the outer wall of at least one combustion chamber. | 12-29-2011 |
| 20120180769 | Two-Cycle Engine - A two-cycle engine having a structure in which the shaft center C | 07-19-2012 |
| 20120192840 | LOST-MOTION VARIABLE VALVE ACTUATION SYSTEM WITH VALVE DEACTIVATION - Devices and related methods are disclosed that generally involve the selective deactivation of one or more engine valves. In one embodiment, a split-cycle internal combustion engine is provided in which a high-speed trigger valve is used to fill and drain a hydraulic tappet that forms part of a lost-motion system of an engine valve. A spool valve can be used to selectively disconnect the tappet from the trigger valve, thereby deactivating the associated engine valve (i.e., preventing the engine valve from opening). The devices and methods disclosed herein also have application in conventional internal combustion engines and can be used with inwardly-opening and/or outwardly-opening valves. | 08-02-2012 |
| 20120204848 | CRANKSHAFT FOR A TWO-STROKE ENGINE - A crankshaft has a receiving platform for catching lubricant dropping from a main bearing assembly. The receiving platform has at least one wall disposed thereon. The wall has one point that is the furthest from the rotational axis of the crankshaft. One channel is defined in the platform and has an inlet disposed close to the point of the wall that is furthest from the rotational axis of the crankshaft. The channel has an outlet in the vicinity of a connecting rod bearing assembly, so that lubricant dropped on the receiving platform will flow to the connecting rod bearing assembly. | 08-16-2012 |
| 20120298083 | TWO-STROKE HEAVY FUEL ENGINE - A two-stroke internal combustion engine is provided. The two-stroke engine can be integrated into a variety of devices, including for example unmanned aerial vehicles, and can operate on heavy fuels including JP-5 and JP-8, for example. In some embodiments, engine can include a crankshaft including first and second main shaft portions interconnected by an offset crank web. The offset crank web can include opposing end portions that are offset from each other and define spaced apart centerlines generally perpendicular to and coplanar with the crankshaft centerline. In other embodiments, the engine can provide improvements in engine cooling, engine exhaust, lubrication delivery, engine mounting, engine fuel delivery and propeller attachment, for example. | 11-29-2012 |
| 20130228159 | TWO-STROKE ENGINE HAVING AN INTAKE ARRANGEMENT - A two-stroke engine has an intake arrangement including a carburetor. An intake channel divides into a mixture channel and an air channel. An intermediate flange is mounted between the carburetor and the cylinder. This flange has a carburetor connecting surface, which faces toward the carburetor, and a cylinder connecting surface which faces toward the cylinder. Referred to the flow direction in the intake channel, the air channel divides upstream of the cylinder connecting surface into two branches. The first branch has a first longitudinal center axis and the second branch has a second longitudinal center axis. The intersect points of the center axes with the connecting surfaces are mutually connected via an imaginary connecting line in the carburetor connecting surface or the cylinder connecting surface. The two connecting lines conjointly define an angle β in the carburetor connecting surface with this angle being greater than 0°. | 09-05-2013 |
| 20130239933 | TWO-CYCLE ENGINE - A pair of suction-side scavenging ports introduces a working gas containing fuel into a combustion chamber, and the working gases are caused to collide with each other to thereby form a working gas layer in a state of two vortexes rotating in opposite directions to each other, and a pair of exhaust-side scavenging ports introduces a non-working gas having a lower fuel content rate than the working gas into the combustion chamber, and the non-working gases are caused to collide with each other to thereby form a non-working gas layer in a state of one vortex. | 09-19-2013 |
| 20130327306 | ROTARY SYNCHRONOUS CHARGE TRAPPING - An exemplary two-stroke internal combustion engine can comprise one or more cylinders comprising exhaust ports, one or more pistons configured to cyclically cover and uncover the exhaust ports during reciprocation of the pistons within the cylinders, and one or more rotary exhaust valves associated with each exhaust port. The exhaust valves can be configured to rotate around a valve axis that is substantially parallel to an axis of rotation of a crank shaft of the engine. Each exhaust valve at least partially obstructs the associated exhaust port during a portion of the exhaust valve's rotation about the valve axis while the associated exhaust port is at least partially uncovered by the associated piston, thereby trapping fresh charge within the combustion chamber. | 12-12-2013 |
| 20140000574 | MUFFLER AND ENGINE-DRIVEN WORK MACHINE | 01-02-2014 |
| 20140034033 | Pancake engine with overexpansion - The crankshaft is stopped part way through the upstroke by a rotary start stop mechanism. As the piston nears the end of the compression stroke, vertical ridges on the piston, in conjunction with mating vertical ridges in the cylinder head, effectively partition the combustion chamber into multiple combustion chambers. In a spark ignition engine, this allows the compression ratio of a smaller cylinder. For HCCI (homogenoous charge compression ignition) operation, the partitions can be ignited at varying times, somewhat averaging the pressure rise. Expansion proceeds to BDC, providing overexpansion. The exhaust valve(s) open prior to BDC. The upstroke continues to the crankshaft stopping angle. Purge is by poppet valves with the inlet valves generating a swirl about the cylinder axis. Power is varied by varying the frequency of cycles, not by reducing the power per cycle. | 02-06-2014 |
| 20140209078 | Adjusting of Air-Fuel Ratio of a Two-Stroke Internal Combustion Engine - To meet stringent emission standards and improve performance of two-stroke crankcase-scavenged engines, the muffler ( | 07-31-2014 |
| 20140261347 | INTERNAL COMBUSTION ENGINE AND ASSOCIATED SYSTEMS AND METHODS - An internal combustion engine comprising a combustion chamber having a surrounding sidewall with a piston slideably disposed in the surrounding sidewall. A motion conversion mechanism is connected to the piston via a piston rod, and is operative to convert reciprocating motion of the piston into rotary motion. The motion conversion mechanism comprises a cam drum and at least one roller connected to the piston rod. A piston valve including a valve head and a valve stem extends through the piston. The piston valve is moveable between an open position and a closed position to control fluid movement through the flow passage. The valve head is pivotably connected to the valve stem and the engine includes a linkage connected to the valve head that is operative to pivot the valve head between an intake position and an exhaust position. | 09-18-2014 |
| 20150075506 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a piston that defines a main combustion chamber with a surrounding wall of a cylinder and a cylinder head, a fuel gas injector configured to inject fuel gas, a scavenging port that supplies air into the main combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a precombustion chamber cap that defines a precombustion chamber inside thereof, a fuel injection timing control unit configured to inject the fuel gas into the main combustion chamber and to inject the fuel gas into the main combustion chamber upon the piston being positioned in the vicinity of the top dead center, and an ignition timing control unit configured to ignite a mixed air of the fuel gas and the air inside the precombustion chamber upon the piston being positioned in the vicinity of the top dead center. | 03-19-2015 |
| 20150337793 | COMBUSTION IGNITION SYSTEM - Ignition systems, devices, and methods of using a resistive heating element to initiate combustion in internal combustion engines are disclosed. In one embodiment, an ignition system comprises a conductive member having a portion arranged for positioning within a combustion chamber of an internal combustion engine and comprising at least two high-resistance portions separated by a low-resistance portion, the high-resistance portions arranged to reach a temperature sufficient to cause ignition within the engine. In some instances, a conductive member positioned within a combustion chamber and arranged to ignite an air/fuel mixture comprises an inner portion and an outer portion, the inner portion comprising a heat removing portion arranged to remove heat from the outer portion sufficient to prevent pre-ignition. Other embodiments are disclosed. | 11-26-2015 |
| 20160076441 | COMPACT NON-VIBRATING ENDOTHERMIC ENGINE - The Compact Non Vibrating Endothermic Engine (CoNVEE in the following) is an internal combustion engine with reciprocating motion of the pistons, whose innovative architecture makes it more compact, given the same delivered power, with respect to the current state of the art. This happens both because the CoNVEE core occupies a very reduced volume, and also because it does not require the presence of any additional compensation or damping of mechanical vibrations. In fact all the moving parts of the CoNVEE are already internally compensated: they act in perfect anti-symmetry compensating each inertia force developed, excluding, of course, that of the motor shaft which is indispensable for the generation of the useful mechanical energy. The intrinsic compactness of the CoNVEE is made possible by the new and characteristic mechanism adopted for the motion transfer from the pistons to the motor shaft. The CoNVEE may be conveniently used with any type of propulsion fuel and, particularly, for those applications which require high power density and low vibration in the motor. | 03-17-2016 |
| 20160377035 | Air Cleaner For Stratified Scavenging Two-Stroke Internal Combustion Engine - To improve the effect of preventing contamination of an element in an air cleaner. An air cleaner includes a first inlet ( | 12-29-2016 |
| 20080196701 | Two-Stroke Internal Combustion Engine with Enhanced Scavenging - The engine has at least one cylinder ( | 08-21-2008 |
| 20110197866 | METHOD OF OPERATION OF TWO-STROKE FORCED CYLINDER FILLING ENGINE - The invention relates to propulsion engineering, namely to methods of operation of two-stroke engines. The invention makes it possible to increase the power-to-volume ratio of an engine through better cylinder filling and to improve engine performance through the utilization of combustion product energy, while using parts that are easy to produce from inexpensive and readily available materials. The essence of the invention is that a portion of incoming charge is by-passed from a cylinder, during the filling thereof, to an exhaust manifold after the combustion products so that a part of the exhaust manifold is filled. A portion of the combustion products is returned towards the cylinder cavity by fully closing the exhaust manifold with the aid of a valve member, and an incoming charge is pumped from the exhaust manifold to the cylinder cavity via exhaust members by virtue of combustion product energy when the scavenging ports are already closed. | 08-18-2011 |
| 20150114372 | Structures, functions, and methods regarding internal combustion engines - Improved structures, functions, and methods regarding internal combustion engines (ICE's). ICE embodiments disclosed are divided into three groups, all of which have at least one embodiment structurally possessing at least one actively powered fan cooperating with at least one exhaust manifold. All of said embodiments disclosed at least solve the objective technical problem of reducing emissions in an ICE. Said embodiments include both normally aspirated and forced induction ICE's. Said embodiments are capable of operation in two stroke cycle Homogeneous Charge Compression Ignition (HCCI) mode, two stroke cycle spark ignition mode, two stroke cycle combination spark ignition and HCCI mode, or four stroke cycle spark ignition mode. The technical field respecting all embodiments and or their methodologies relates generally to ICE's. Principal uses of the embodiments include enabling the operation of ICE's in the above said various mode or modes. | 04-30-2015 |
| 20080276919 | Piston, A Ring and a Piston Assembly for a Two Cycle Engine - A piston ring ( | 11-13-2008 |
| 20080283029 | Two-stroke internal combustion engine - Disclosed is a two-stroke internal combustion engine comprising a cylinder ( | 11-20-2008 |
| 20100037876 | Two-stroke internal combustion engine with valves for improved fuel efficiency - A two-stroke cycle internal combustion engine has a cylinder with a cylinder head closing off an end of the cylinder, a crankshaft and a piston connecting with the crankshaft to move the piston in a reciprocating movement within the cylinder. Intake and exhaust valves move into and out of a combustion chamber for openings and closures of the valves. A mixture of fuel and air is forced into the cylinder during an open interval of the intake valve beginning in the middle of the upstroke and terminating in a range of 20-60 degrees before top dead center to improve efficiency and choice of fuel by minimizing compressive forces of the piston during the upstroke. Timing of the closure of the intake valve may be delayed automatically with a reduction in crankshaft angular speed. | 02-18-2010 |
| 20120227716 | TWO-STROKE MOTOR WITH IMPROVED SILENCER AND ADAPTED MOTOR MANAGEMENT - In order to further develop a two-stroke motor with a silencer, whereby the silencer has a silencer inlet to which a flow channel connects, and the flow channel is so flow-beneficially designed between the silencer inlet and the first chamber that due to its mass inertia the exhaust gas flowing into the silencer inlet predominantly flows into the first chamber and after filling the first chamber flows back again thereby forming a counter-pressure in the direction of the combustion chamber, so that the above-described drawbacks are prevented, it is proposed to set the ignition time for igniting a fuel-air mixture present in the combustion chamber at an earlier time before the dead centre of a piston defining the combustion chamber in terms of stroke movement, compared with the ignition time of a two-stroke motor operated with a silencer structurally limited to the second chamber. | 09-13-2012 |
| 20140318515 | STRATIFIED SCAVENGING TWO-STROKE ENGINE - An air-leading type, stratified scavenging two-stroke engine. The engine including a cylinder member and a crankcase joined therewith has an intake passage, an exhaust passage, first and second scavenging passages, a communicating portion and an air passage. The intake passage, the exhaust passage and the air passage are formed in the cylinder member. The first and the second scavenging passages each has a cylinder member-side passage and a crankcase-side passage. The cylinder member-side passages of both of the first and the second scavenging passages communicate with each other via the communicating portion. The air passage is connected to the cylinder member-side passage of the first scavenging passage. In the engine, air for pre-scavenging is introduced from the air passage through a check valve into the cylinder member-side passage of the first scavenging passage, and a part of the introduced air flows into the second scavenging passage through the communicating portion. | 10-30-2014 |
| 20150034060 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE ENGINE - An exhaust valve assembly has a valve actuator, a first valve part (FVP) operatively connected to the actuator, a second valve part (SVP), and at least one auxiliary valve operatively connected to the second valve part. When the actuator is in a first position, the FVP is in a fourth position, the SVP is in a seventh position and the at least one auxiliary valve is in a ninth position. When the actuator is in a second position, the FVP is in a fifth position, the SVP is in the seventh position and the at least one auxiliary valve is in the ninth position. When the actuator is in a third position, the FVP is in a sixth position, the SVP is in an eighth position and the at least one auxiliary valve is in a tenth position. The second position is intermediate the first and third positions. | 02-05-2015 |
| 20160032816 | UNIFLOW TWO-STROKE ENGINE - A uniflow two-stroke engine includes: a cylinder receiving a piston such that the piston can reciprocate therein and defining a combustion chamber above the piston; an exhaust port having one end in communication with an upper end portion of the cylinder; a scavenging port having a scavenging orifice at one end, the scavenging orifice being in communication with a lower part of a side portion of the cylinder such that the scavenging port is selectively brought into communication with and shut off from the combustion chamber by the piston; and an exhaust gas recirculation passage having one end in communication with a part of the side portion of the cylinder above the scavenging port and the other end in communication with the scavenging port such that the exhaust gas recirculation passage is selectively brought into communication with and shut off from the combustion chamber by the piston. | 02-04-2016 |
| 20160177812 | METHOD FOR CONTROLLING A TWO-STROKE INTERNAL COMBUSTION ENGINE | 06-23-2016 |
| 20190145308 | TWO-STROKE INTERNAL COMBUSTION ENGINE | 05-16-2019 |
| 20150047620 | TWO-CYCLE GAS ENGINE - A two-cycle gas engine includes a cylinder, a cylinder head, a piston that defines a combustion chamber with a surrounding wall of the cylinder and the cylinder head, a fuel gas injector, an ignition unit, a scavenging port configured to supply air into the combustion chamber upon the piston being positioned in vicinity of a bottom dead center, a fuel gas injection timing control unit configured to cause the fuel gas injector to inject the fuel gas upon the piston being positioned at 10° to 100° before top dead center in an ascending stroke and to cause the fuel gas injector to inject the fuel gas upon the piston being positioned in vicinity of the top dead center, and an ignition timing control unit configured to ignite the fuel gas inside the combustion chamber upon the piston being positioned in the vicinity of the top dead center. | 02-19-2015 |
| 20090283079 | Air Cleaner For Stratified-Scavenging Two-Stroke Internal Combustion Engine - Object It is intended to prevent intrusion of air-fuel mixture into an air cleaner by blow-back in an air-fuel mixture passage of a stratified-scavenging two-stroke engine. | 11-19-2009 |
| 20110061636 | Two-Stroke Engine - A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air and charge inlet passages are substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially perpendicular to the piston pin. | 03-17-2011 |
| 20090050124 | Two-Cycle Engine - A two-cycle engine includes a starting fuel supply passage for supplying a starting fuel to a crankcase from a starting fuel reservoir, and a flow passage opening and closing unit provided in a midway portion of the starting fuel supply passage. The starting fuel supply passage is opened to be constantly in communication with the crankcase. Accordingly, simultaneously with the generation of a negative pressure within the crankcase when a piston starts to ascend from a bottom dead center, the starting fuel starts to be supplied to the crankcase. Since the starting fuel is supplied to the crankcase for a relatively long time as compared to a conventional engine, a sufficient amount of the fuel is supplied for starting and startability of the two-cycle engine is improved. | 02-26-2009 |
| 20100037874 | TWO-STROKE ENGINE EMISSION CONTROL - A two-stroke internal combustion engine is provided. The engine includes a block defining a crankcase for enclosing a fuel mixture and a cylinder chamber formed at an end of a cylinder bore, an air passage in fluid communication with the cylinder bore, a scavenging transfer passage communicating between the crankcase and the cylinder chamber and having a primary transfer port in communication with a secondary transfer port, the secondary port having a first and a spaced-apart second window with a bridge spanning the space therebetween, and a piston slideably positioned in the cylinder bore and having a channel formed in a periphery of the piston and having a piston opening defined therein for providing selective communication between the crankcase and the transfer passage. | 02-18-2010 |
| 20100037875 | TWO CYCLE ENGINE AND TOOL - The invention provides a two cycle engine which can improve an output by effective scavenging. In a two cycle engine having an exhaust port provided in a side portion of a cylinder, and a scavenge air port provided in the side portion of the cylinder so as to be symmetrical with a plane passing through a center in a cylinder circumference direction of the exhaust port an axis extending to inside of the cylinder, the scavenge air port is structured such that an axis extending to inside of the cylinder from an opening of the scavenge air port in such a direction as to be away from the exhaust port of the cylinder, and is divided in an cylinder axis direction by a dividing portion. | 02-18-2010 |
| 20100288251 | SCAVENGING COVER AND TWO-CYCLE ENGINE - Since a throttle hole for narrowing a scavenging passage is provided on a partition for closing the scavenging passage, the throttle hole of a desired size can be drilled at a desired location on the partition after preparing the scavenging cover having no throttle hole on the partition. Accordingly, the size and location of the throttle hole can be easily changed in conducting a test for finding the most appropriate size and location of the throttle hole, so that the most appropriate size and location of the throttle hole can be easily found. | 11-18-2010 |
| 20110146641 | Internal Combustion Engine - An internal combustion engine has a cylinder with cylinder liner and a reciprocatingly supported piston delimiting a combustion chamber and driving in rotation a crankshaft in a crankcase. A device for supplying fuel and combustion air is provided. At least one transfer passage connects in at least one piston position the crankcase interior with the combustion chamber. The transfer passage has a transfer port that opens into the combustion chamber and an opening that opens into the crankcase. Opening and transfer port are displaced relative to each other in circumferential direction of the cylinder. The cylinder liner has at least one segment of a piston bearing surface and forms at least one wall section of the transfer passage. The cylinder has an upper cylinder segment and a lower cylinder segment that are separately embodied. The cylinder liner is separate from the upper and lower cylinder segments. | 06-23-2011 |
| 20110220074 | STRATIFIED TWO-STROKE ENGINE AND FUEL - Various embodiments include a two-stroke engine and a carburetor for use with gaseous fuel, such as hydrogen, methane, liquid petroleum gas, pure propane, and butane. | 09-15-2011 |
| 20120152216 | TWO-STROKE ENGINE - A two stroke engine comprises a cylinder, in which a combustion chamber bounded by a piston is formed, and an intake passage. A carburetor forms a section of the intake passage, within which a throttle element is mounted pivotably, and at least one main fuel opening and at least one idling fuel opening open into the intake passage, which is divided downstream of the carburetor into an air passage and a mixture passage. The idling fuel opening feeds a secondary passage arranged within the mixture passage. In the idling position, the throttle element may be arranged adjacent to the upstream entry opening in the secondary passage, and the throttle element may have an opening which, in the idling position of the throttle element, is arranged in the region of the entry opening and connects the secondary passage to that region of the intake passage located upstream of the throttle element. | 06-21-2012 |
| 20130228158 | TWO STROKE ENGINE PORTING ARRANGEMENT - A gas transfer port system for a cylinder of a two stroke internal combustion engine; said cylinder provided with a fixed separator plate dividing said cylinder into an upper section and a lower section; a piston in said cylinder reciprocating between said separator plate and a cylinder head; and wherein an annular skirt descending from said separator plate forms at least a portion of an annular well between said skirt and an internal surface of said cylinder; said well sealed at the bottom such that said cylinder is isolated from a crankcase of said engine; said gas transfer port system including at least one long gas transfer port connecting a lower portion of said annular well with a gas transfer port outlet aperture in a wall of said cylinder. | 09-05-2013 |
| 20140216425 | REDUCTION OF RING CLIPPING IN TWO-STROKE CYCLE ENGINES - A port for a cylinder of a two-stroke cycle engine includes at least one generally circumferential array of port openings. Port openings have a shape that reduces ring clipping during engine operation. The port opening shape is defined at a bore surface by opposing top and bottom edges joined by side edges. Each of the top and bottom edges is characterized by rounded corner transitions to the side edges, a rounded peak, and inclined ramp portions extending from the rounded corner transitions to the rounded peak. | 08-07-2014 |
| 20140216426 | TWO-CYCLE ENGINE AND METHOD FOR LUBRICATING TWO-CYCLE ENGINE - The two-cycle engine includes a piston capable of reciprocating along a cylinder, the piston being provided with piston rings; and a lubrication port provided in the cylinder, the lubrication port being used to supply a lubricant to a sliding surface of the cylinder on which the piston rings slide. Inter-ring spaces are provided, each inter-ring space being between adjacent piston rings. In addition, the two-cycle engine includes a controller used to adjust a lubrication period of lubricating from the lubrication port during movement of the piston toward a top dead center thereof, so that a period before an uppermost inter-ring space passing by the lubrication port is excluded from the lubrication period and a period in which at least part of a lowermost inter-ring space faces the lubrication port is included in the lubrication period. | 08-07-2014 |
| 20160097343 | Air Leading-Type Stratified Scavenging Two-Stroke Internal-Combustion Engine - The certainty of supplying air to a scavenging channel through a piston groove is improved. In a cylinder wall | 04-07-2016 |
| 20180023528 | INJECTION SYSTEM FOR TWO-STROKE ENGINES | 01-25-2018 |
| 20110155111 | EXHAUST GAS RECIRCULATION SYSTEM FOR A LOCOMOTIVE TWO-STROKE UNIFLOW SCAVENGED DIESEL ENGINE - A locomotive two-stroke uniflow scavenged diesel engine system including an exhaust gas recirculation (EGR) system is described for reducing NO | 06-30-2011 |
| 20120304972 | TWO-STROKE ENGINE WITH LOW CONSUMPTION AND LOW EMISSIONS - Two-stroke engine ( | 12-06-2012 |
| 20130247885 | TWO-STROKE ENGINE AND FOUR-STROKE ENGINE - A two-stroke engine ( | 09-26-2013 |
| 20080223349 | Stratified scavenging two-stoke cycle engine - A stratified scavenging two-stroke cycle engine with the check valve for introducing scavenging air simplified in construction is provided. The gasket between the flange part forming an air supply chamber and a mixture passage at a side of the cylinder and the passage connecting member having an air flow passage and a mixture flow passage is composed to have an integral leaf valve for allowing air in the air flow passage in the passage connecting member to flow only toward the air supply chamber which is connected to the scavenging passages of the engine so that the gasket has a function as a seal member and that as a check valve. | 09-18-2008 |
| 20100192928 | TWO-STROKE CYCLE COMBUSTION ENGINE OF AIR SCAVENGING TYPE - To provide a two-stroke cycle combustion engine of an air scavenging type, in which not only can transit from the idling condition to the rapid accelerating condition take place smoothly, but the combustion engine can be smoothly started, there are provided scavenging passages ( | 08-05-2010 |
| 20100206279 | METHOD AND APPARATUS FOR OPTIMIZATION OF OPERATION AND SUPPLY OF TWO-STROKE ENDOTHERMIC ENGINES, PARTICULARLY TO BE EMPLOYED IN THE INDUSTRIAL SECTOR RELEVANT TO MICROENGINES IN THE HOBBY-MODELLISTIC FIELD - The invention concerns a method and an apparatus for optimization of operation and supply of two-stroke endothermic engines, particularly to be employed in the industrial sector relevant to micro engines in the hobby-modellistic field, so as to obtain an improvement of known two-stroke endothermic engines with suction by rotating disc valve, thanks to the use of methods permitting obtaining a better general efficiency of engine, thus obtaining lower consumption along with a better volumetric efficiency and a better mechanical efficiency. | 08-19-2010 |
| 20100258098 | Two-Stroke Engine and Related Methods - A two-stroke engine includes a crankshaft that is rotatable about an axis, and an engine block that includes a combustion cylinder and a compression cylinder. A first piston is slidably disposed within the combustion cylinder and is operatively coupled to the crankshaft for reciprocating movement within the combustion cylinder through a power stroke during each rotation of the crankshaft about the axis. A second piston is slidably disposed within the compression cylinder and is operatively coupled to the crankshaft for reciprocating movement within the compression cylinder such that fresh air is received and compressed in the compression cylinder during each rotation of the crankshaft about the axis. A conduit provides fluid communication between the combustion cylinder and the compression cylinder, and a fuel injector is in communication with the combustion cylinder for admitting fuel into the combustion cylinder. | 10-14-2010 |
| 20120227717 | TWO-STROKE ENGINES - A two-stroke, internal combustion engine which includes at least one set of paired first and second cylinders. The engine includes an air or air/fuel mixture inlet conduit bifurcated into inlet passages extending to respective first and second inlet ports of the first and second cylinders. A valve controls the passage of air or air/fuel mixture into the inlet passages. In one embodiment of the engine, a bypass passage provided with a bypass valve extends between the inlet ports of the paired cylinders. | 09-13-2012 |
| 20130327307 | 2-CYCLE ENGINE AND ENGINE-POWERED WORKING MACHINE HAVING THE SAME - A 2-cycle engine has: a piston reciprocably housed in a cylinder bore; an intake opening, an exhaust opening, and a scavenge opening provided in an inner peripheral wall of the cylinder bore and opened/closed by the piston; and a scavenge passage connecting the scavenge opening and a crank chamber. A valve that opens/closes the scavenge passage is provided on the scavenge passage. | 12-12-2013 |
| 20160032793 | EXHAUST VALVE ASSEMBLY FOR A TWO-STROKE INTERNAL COMBUSTION ENGINE - An exhaust valve assembly for a two-stroke internal combustion engine has a valve actuator having a first pressure chamber and a second pressure chamber, and a valve operatively connected to the valve actuator. The first and second pressure chambers are adapted for selectively receiving one of a first pressure and a second pressure. The first pressure is higher than the second pressure. The valve actuator moves the valve between at least a first valve position and a second valve position. The valve actuator moves the valve to the first valve position when the first pressure is supplied to the first pressure chamber and the second pressure is supplied to the second pressure chamber. The valve actuator moves the valve to the second valve position when the second pressure is supplied to the first pressure chamber and the first pressure is supplied to the second pressure chamber. | 02-04-2016 |
