| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 123051000 | MULTIPLE PISTON, COMMON NONRESTRICTIVE COMBUSTION CHAMBER | 77 |
| 20080210204 | Internal combustion engine - A piston of an internal combustion engine includes a cavity for gases passing a piston ring and a first flow path leading from the cavity to a piston ring region and a second flow path extending from the cavity to an outlet opening for removing gases to an inlet opening in a cylinder wall in at least one piston position. | 09-04-2008 |
| 20080245345 | Oscillating Piston Engine - An oscillating piston engine comprises an internal combustion engine part having a housing part in which there are arranged a first and at least a second piston which can jointly revolve in the housing part about an axis of rotation fixed in relation to the housing and which, when revolving about the axis of rotation, perform reciprocating oscillating movements in opposition to one another about an axis of oscillation extending perpendicularly to the axis of rotation. The first piston has a first end face and the at least second piston has a second end face facing the first end face, the end faces delimiting a working chamber in the direction of oscillation of the pistons. The internal combustion engine part is adjoined in the direction of the axis of rotation by an electromotive part having at least one rotor which is arranged concentrically with the axis of rotation and which is arranged in a housing part adjoining the housing part of the internal combustion engine part. | 10-09-2008 |
| 20090090334 | Opposed piston electromagnetic engine - An engine includes a cylinder having a two pistons slidably disposed therein, a port arranged to admit a reactant into the cylinder between the two pistons, and a converter operable with at least one piston to convert mechanical energy of the piston to electrical energy. | 04-09-2009 |
| 20100071671 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20100147269 | Internal Combustion Engine With Optimal Bore-To-Stroke Ratio - An internal combustion engine. The engine includes at least one cylinder having a bore diameter, a piston for traveling within each cylinder between a first position and a second position, wherein the distance between the first position and the second position defines a stroke length, and thermal barriers on the surfaces of the combustion chamber near top dead center. In one embodiment, the engine utilizes asymmetric effective compression and expansion strokes. To maximize efficiency of the engine, a ratio of the bore diameter to stroke length of the internal combustion engine comprises a range between 0.5 to 1.0. | 06-17-2010 |
| 20100212637 | Cylinder and piston assemblies for opposed piston engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 08-26-2010 |
| 20100212638 | Opposed piston engines with controlled provision of lubricant for lubrication and cooling - In multi-cylinder opposed engine constructions provision of lubricant for lubricating bearings, for cooling cylinders, and for cooling pistons includes pumping an inlet stream of lubricant through a gallery in the engine that is in fluid communication with bearing lubricant passages and cylinder coolant passages and providing lubricant from the inlet stream of lubricant into at least one piston coolant manifold in response to a first engine operating condition. | 08-26-2010 |
| 20100229836 | GUIDED BRIDGE FOR A PISTON IN AN INTERNAL COMBUSTION ENGINE - An improved configuration for internal combustion engine that reduces side forces on pistons during the engine cycle. The improvement is an intermediate and guided bridge element located between pull rods and pistons with articulated connections that allow side forces to be dissipated away from the pistons. | 09-16-2010 |
| 20100319661 | Cylinder-Mounted oil wiper for an opposed piston engine - A ported cylinder for a diesel engine includes a circular groove in the bore, located on the outside of respective port. An oil wiper ring or a group of oil wiper rings is seated in the circular groove for wiping excess lubricating oil from a piston surface. A compressing ring is disposed between the oil wiper ring or group of oil wiper rings and the floor of the circular groove to urge the oil wiper rings into contact with the piston surface. An oil wiper ring construction includes a major surface with oil-conducting channels. | 12-23-2010 |
| 20110083644 | Engine Having Opposed Pistons and Opposed Cylinders and Side Dual Power Output Shafts - An engine having axial inline pistons connected to side power output shafts is disclosed. The engine includes a cylinder defining an interior space of the cylinder; a first piston that reciprocates in the interior space of the cylinder wherein the first piston has a first end forming a first piston head; a first piston rod attached to the first piston at a second end of the first piston opposite the first end of the first piston; a second piston that reciprocates in the interior space of the cylinder, wherein the second piston has a first end forming a second piston head; a second piston rod attached to the second piston at a second end of the second piston opposite the first end of the second piston; a first connecting rod connected to the first piston rod and coupled to a first power output shaft; and a second connecting rod connected to the second piston rod and coupled to the first power output shaft. The first piston head and the second piston head define a combustion chamber in the cylinder between the first piston head and the second piston head, and the first piston head and the second piston head move away from each other on a first power stroke of the first piston and a second power stroke of the second piston. | 04-14-2011 |
| 20110100334 | FUEL INJECTION SYSTEM - An engine includes a first piston with surfaces that define a substantially cylindrical chamber inside the first piston and a passage into the substantially cylindrical chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical chamber and to define, in cooperation with the substantially cylindrical chamber, a combustion chamber. A fuel injector extends at least partially through the passage in the first piston to inject fuel into the combustion chamber. The first piston is arranged to move in a reciprocating manner relative to the fuel injector. | 05-05-2011 |
| 20110132333 | INTERNAL COMBUSTION ENGINE WITH WORKING, PISTON AND CONTROL PISTON - The invention relates to an internal combustion engine comprising two opposed pistons sharing the same cylinder (FIG. | 06-09-2011 |
| 20110146629 | INTERNAL PRESSURE DRIVEN ENGINE - An internal combustion engine or other internal pressure driven engine of the type capable of converting reciprocal linear powered motion into unidirectional rotary motion, the engine having at least one pair of first and second cylinders with each cylinder having a pair of opposed pistons therein forming a pressure chamber therebetween. Outer ends of each piston carries a piston rod connected to a pivot arm of a respective one way clutch which causes the clutch to oscillate back and forth when the piston moves in and out due to pressure or combustion in the pressure chamber. Alternatively, the piston rods may be configured as gear racks in direct operative engagement with pinion gears of the one way clutches. The clutches are parallel and spaced apart from each other near each end of the cylinders. Each clutch carries a gear on one end which intermeshes with a gear rack assembly having gears and a gear rack which drives a crankshaft and auxiliary flywheel operatively connected to a starter. Once the starter is turned on the kinetic energy of the flywheel and gear rack keeps the on/off clutches in continuous oscillation. The oscillating clutches turn unidirectional drive shafts connected through pinion gears to a main output shaft and main flywheel. | 06-23-2011 |
| 20110186017 | Single-crankshaft, opposed-piston engine constructions - Ported engines with opposed pistons are coupled to a single crankshaft through rocker arm linkages. Each pair of opposed pistons is coupled to a single crankpin of the crankshaft. Each piston is coupled to a respective rocker arm linkage by a rolling thrust bearing which prevents linkage movement that is transverse to the axis of the piston from being transferred to the piston. Each piston of a pair of opposed pistons is coupled to the same crankpin by respective rocker arm linkages in which connecting rods run between the crankpin and respective rocker arms. One connecting rod is connected to first rocker arm below the rocker arm's pivot point and another connecting rod is connected to a second rocker arm above the rocker arm's pivot point. | 08-04-2011 |
| 20110259304 | FUEL INJECTION SYSTEM - An engine includes a fuel injector support element to support a fuel injector and define a first opening through which the fuel injector can inject fuel. A first piston defines a substantially cylindrical inner chamber and a portal into the substantially cylindrical inner chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical inner chamber and to define, in cooperation with the substantially cylindrical inner chamber, a combustion chamber. The first fuel injector support element and the first piston are arranged such that, during engine operation, the first piston reciprocates relative to the first fuel injector support element to thereby cause the first opening and the first portal to move in and out of alignment with one another. | 10-27-2011 |
| 20120031379 | Horizontally Opposed Center Fired Engine - The horizontally opposed center fired engine improves on the traditional design of the horizontally opposed engines and center fired engines with a better engine geometry. The present invention utilizes four pairs of opposing pistons to compress a larger volume of air-fuel mixture within four different cylinders. The four different cylinders are radially positioned around a center axle in order to achieve a perfectly symmetric engine geometry. The center axle consists of two different shafts spinning in two different directions, which could drastically reduce engine vibrations in the present invention. Engine vibrations are caused by a change in engine speed and result in a loss of energy. Due to the design, the present invention will only experience energy loss in the form of entropy and friction. Thus, the present invention can convert a higher percentage of chemical energy into mechanical energy than any other internal combustion engine. | 02-09-2012 |
| 20120037129 | OPPOSED PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 02-16-2012 |
| 20120037130 | Opposed-piston engine having a single crankshaft coupled to the opposed pistons by linkages with pivoted rocker arms - An opposed-piston engine with a single crankshaft has a rocker-type linkage coupling the crankshaft to the pistons that utilizes a rotatable pivot rocker arm with full-contact plain bearings. A rocker-type linkage utilizes a rotatable pivot bearing with an eccentric aspect to vary translation of piston linkage along the axial direction of a cylinder, which shifts the top dead center (TDC) and bottom dead center (BDC) locations of a piston so as to change the volume of charge air compressed during the power stroke. | 02-16-2012 |
| 20120055451 | Inwardly Opposed Pistons, Fixed Position Common Cylinder Engine with External Induction - An engine with a design for an inwardly opposed-piston, 4 cycle engine with a common, fixed cylinder and external induction system. The present invention features include a fixed, common cylinder in which 2 pistons move towards each other during the cycling of the engine, external, modular, fix mounted induction and exhaust system, multiple power take off shafts as well as additional cylinder/piston bank modularity. The production of such design provides for increased thermal, mechanical and volumetric efficiency as it relates to similar internal combustion engines. | 03-08-2012 |
| 20120186561 | Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston engines - An opposed piston engine includes at least one cylinder with a bore surface and longitudinally-spaced exhaust and intake ports that open through the sidewall of the cylinder. A pair of opposed pistons is disposed in the cylinder for sliding movement along the bore surface. An oil-retaining surface texture pattern in an interface between the pistons and the bore surface extends in a longitudinal direction of the cylinder, aligned with bridges of at least one port. The surface texture pattern includes a plurality of separate recesses on an outside surface of a skirt of each piston. Alternatively, or in addition, the surface texture pattern includes a plurality of separate recesses extending in a longitudinal direction of the cylinder, aligned with bridges of at least one port. | 07-26-2012 |
| 20120192838 | BALANCED FIVE STROKE, FIVE CYLINDER BARREL CAM TYPE INTERNAL COMBUSTION ENGINE - A balanced five-stroke cycle, five cylinder engine, wherein the five cylinders are parallel and arranged around a shaft mounted in a centrally disposed bore in the engine block, wherein the shaft is parallel to the cylinders, wherein power pistons in the cylinders dwell motionless for the intake part of the cycle between the vacuum stroke and the compression stroke of each power piston; induction of the combustion mixture resulting from the partial vacuum created by the vacuum stroke of the power piston, and wherein the position of each power piston is governed by a power piston cam mounted on the shaft, the shaft and bore on the centroidal axis of symmetry of the radially spaced apart array of five cylinders corresponding to the pistons, the opening and closing of exhaust ports governed by an exhaust piston cam mounted on the shaft moving exhaust pistons along the cylinders. | 08-02-2012 |
| 20120279479 | Heat Recycling Internal Combustion Enines - This patent describes two engine designs capable of recycling waste heat. The engines are both theoretically capable of approaching 100% efficiency in converting fuel to motion, although they use the same thermodynamic cycle as much lower efficiency 4 stroke engines. | 11-08-2012 |
| 20120285422 | Dual crankshaft, opposed-opposed-piston engine constructions - A dual-crankshaft, opposed-piston, internal combustion engine includes one or more ported cylinders. Each cylinder has exhaust and intake ports, and the cylinders are juxtaposed and oriented with exhaust and intake ports mutually aligned. The crankshafts are rotatably mounted at respective exhaust and intake ends of the cylinders and are coupled by a multi-gear train. A pair of pistons is disposed for opposed sliding movement in the bore of each cylinder. All of the pistons controlling the exhaust ports are coupled by connecting rods to the crankshaft mounted near at the exhaust ends of the cylinders, and all of the pistons controlling the intake ports are coupled by connecting rods to the crankshaft mounted near at the intake ends of the cylinders. The crankshafts are connected by a timing belt operative to change the rotational timing between the crankshafts. The gear train support structure is stiffened to suppress gear train vibration. | 11-15-2012 |
| 20120298077 | OPPOSED PISTON ENGINE WITH GAS EXCHANGE CONTROL BY MEANS OF HYDROSTATICALLY MOVED SLIDING SLEEVES - An opposed piston engine with gas exchange control using sliding sleeves embodied on their outer periphery as differential pistons that can be operated as slave pistons. A plunger that is displaceable by a cam is used as a master piston. A hydraulic liquid is housed between the master piston and the slave piston in a closed pipe system. The liquid column housed between the master piston and the slave piston can be displaced back and forth by hydrostatic pressure build-up enabling the gas exchange elements to be opened and closed by the sliding sleeves. | 11-29-2012 |
| 20130112175 | Constructions for Piston Thermal Management - A piston construction with an end surface is equipped with a pattern of insulating cavities embedded in an upper end of the piston, between the end surface and interior portions of the piston that are cooled by circulating liquid coolant. | 05-09-2013 |
| 20130199503 | Opposed-piston cylinder bore constructions with solid lubrication in the top ring reversal zones - A cylinder for an opposed-piston engine is equipped with a cylinder bore that provides solid lubrication of bore/piston surface interfaces in top ring reversal zones of the cylinder bore. | 08-08-2013 |
| 20130206113 | METHOD AND MEANS FOR CONTROLLING COMBUSTION - A method of charging an internal combustion engine with a fuel air mixture, the engine having opposed pistons with a combustion chamber therebetween, wherein the method includes forcing induction air during a compression stroke between a first and a second cylinder via a contraction and expansion or a venturi disposed between the first and second pistons. | 08-15-2013 |
| 20130276761 | VARIABLE-COMPRESSION ENGINE ASSEMBLY - Variable-compression engine assemblies with an internal combustion device and a flywheel are presented herein. An engine assembly is disclosed which includes an output shaft and a flywheel, which includes a variable cam surface and is slidably mounted onto the output shaft and rotatable about a flywheel axis. Also included is an internal combustion device with a piston that is movable along a central axis in a cycle between refracted and extended positions. The piston engages the variable cam surface, and the central axis of the piston is spaced from the flywheel axis. The cycle includes a power stroke when the piston moves from the retracted position to the extended position whereby the piston presses against the variable cam surface and thereby rotates the flywheel, and a compression stroke when the piston moves from the extended position to the retracted position responsive to the variable cam surface. | 10-24-2013 |
| 20130276762 | Symmetric Opposed-Piston, Opposed-Cylinder Engine - An opposed-piston, opposed-cylinder engine is disclosed that has the pistons symmetrically arranged in the opposed cylinders. In one embodiment, the inner pistons are exhaust pistons and the outer pistons are intake pistons. Alternatively, the inner pistons are intake pistons and the outer pistons are exhaust pistons. The pistons are coupled to the crankshaft that is situated between the opposed cylinders. Central axes of the two cylinders are offset by a predetermined distance. The connecting rods that couple between the crankshaft and the pistons are arranged adjacent to each other on journals of the crankshaft. The journal to which the pushrods couple is not a split-pin type. Instead, it is one that has a common central axis. Furthermore, the crankshaft is a one-piece or unitary structure. | 10-24-2013 |
| 20140026864 | Cylinder and Piston Assemblies for Opposed Piston Engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 01-30-2014 |
| 20140083396 | Combustion Chamber Constructions for Opposed-Piston Engines - An opposed-piston engine includes a ported cylinder and a pair of pistons disposed to reciprocate in the bore of the cylinder. A combustion chamber is defined by opposing shaped piston end surfaces as the pistons approach respective top dead center (TDC) locations in the bore. At the end of scavenging, the shaped end surfaces of the pistons interact with swirl to produce turbulence in the charge air motion in the combustion chamber; the additional bulk motions include tumble. Fuel is injected into the turbulent charge air motion along a major axis, of the combustion chamber. | 03-27-2014 |
| 20140090625 | Piston Thermal Management in an Opposed-Piston Engine - An opposed-piston engine includes pistons, each piston having an annular cavity in the piston's sidewall and positioned between its crown and ring grooves to block transfer of heat from the crown to the piston body. | 04-03-2014 |
| 20140102418 | OPPOSED PISTON ENGINE WITH NON-COLLINEAR AXES OF TRANSLATION - An opposed piston internal combustion engine can include two opposed pistons ( | 04-17-2014 |
| 20140109877 | Integrated Piston and Bridge - A piston coupled to a crankshaft via pullrods presents challenges for coupling the piston to the crankshaft because the connections are provided outside the piston. A bridge is coupled to a piston skirt at the end of the piston away from the piston crown. The bridge structure includes: a central support structure, a first projection extending outwardly from the central support structure in a first radial direction, and a second projection extending outwardly from the central support structure in a second radial direction. The central support structure is substantially hollow with a series of internal braces to yield a lightweight piston. | 04-24-2014 |
| 20140130780 | INTERNAL COMBUSTION ENGINE - The invention relates to an engine ( | 05-15-2014 |
| 20140196693 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder) and a crankshaft disposed at one end of the cylinder. Within each cylinder there is a pair of opposed, reciprocating pistons that form a combustion chamber ( | 07-17-2014 |
| 20140299109 | Dual Crankshaft, Opposed-Piston Engines With Variable Crank Phasing - The timing or phasing of port openings and closings during operation of an opposed-piston engine is varied in response to changing engine speeds and loads by changing crankshaft phasing. | 10-09-2014 |
| 20150013649 | Combustion Chamber Constructions For Opposed-Piston Engines - A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity. | 01-15-2015 |
| 20150027418 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder and a pair of opposed, reciprocating pistons within the cylinder forming a combustion chamber therebetween. The engine has at least one combustion igniter associated with the cylinder, a portion of the combustion igniter being exposed within the combustion chamber formed between the opposed pistons. | 01-29-2015 |
| 20150114358 | Master and Slave Pullrods - Master and slave pullrods are disclosed in which a master pullrod is coupled to a journal of a crankshaft. The slave pullrod indirectly couples to the crankshaft by coupling to the master pullrod. Such a configuration allows two connecting rods to be coupled to the journal of the crankshaft inline with each other. | 04-30-2015 |
| 20150122227 | Combustion Chamber Construction with Dual Mixing Regions for Opposed-Piston Engines - A combustion chamber construction for opposed-piston engines in which fuel is injected from two opposed injectors includes a dual mixing region construction with a respective mixing region for each injector and a coupling region between the two mixing regions through which the mixing regions communicate. In some aspects, the mixing regions are bulbous and are connected by a waist, or tunnel, region that is relatively narrower than the bulbous mixing chambers. | 05-07-2015 |
| 20160047296 | Mechanism For Varying Crankshaft Timing On A Belt/Chain Driven, Dual Crankshaft Opposed-Piston Engine - A mechanism for varying crankshaft timing on a belt/chain driven, dual crankshaft opposed-piston engine includes sprockets on corresponding ends of the two crankshafts, connected by a belt or chain which is tensioned by two or more tensioners. By changing the position of the tensioners the length of the two spans of the belt/chain are varied and thus the phase between the crankshafts is varied. | 02-18-2016 |
| 20160053674 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 02-25-2016 |
| 20160061106 | CRANKSHAFT FOR AN INTERNAL COMBUSTION ENGINE - An internal combustion engine includes a crankshaft having a first web portion defining an inner opening and defining an undercut proximate the inner opening, a second web portion defining an inner opening and defining an undercut proximate the inner opening and an inner bearing portion that engages with the inner opening of the first web portion and with the inner opening of the second web portion. First and second pushrods each have a piston end and a crankshaft end. The crankshaft ends of the first and second pushrods each have a concave surface placed over different portions of the inner bearing portion between the first and second web portions, and each further have shoulders adjacent their respective concave surface that engage with the undercuts of the first and second web portions. | 03-03-2016 |
| 20160146164 | DEVICE FOR ADMITTING INLET GASES AND/OR RECIRCULATED EXHAUST GASES INTO AN INTERNAL COMBUSTION ENGINE CYLINDER - The invention relates to a device for admitting inlet gases and/or recirculated exhaust gases into an internal combustion engine cylinder, the device comprising a duct designed to supply said cylinder with inlet gases and/or with recirculated exhaust gases, characterized in that said device further comprises, in the duct, a flow control means that can be operated between a first position in which said duct supplies the cylinder with the inlet gases and a second position in which said duct supplies the cylinder with the recirculated exhaust gases. It also relates to the intake module and to the engine equipped therewith. | 05-26-2016 |
| 20160252012 | INTERNAL COMBUSTION ENGINES | 09-01-2016 |
| 20160252013 | Piston Crown and Corresponding Port Geometry | 09-01-2016 |
| 20160252044 | Engine Block Construction For Opposed Piston Engine | 09-01-2016 |
| 20160252065 | Opposed Piston Three Nozzle Combustion Chamber Design | 09-01-2016 |
| 20160252066 | Fuel Injector with Offset Nozzle Angle | 09-01-2016 |
| 20160252067 | Opposed Piston Three Nozzle Piston Bowl Design | 09-01-2016 |
| 20100071670 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20120118272 | AXIAL-PISTON ENGINE, METHOD FOR OPERATING AN AXIAL-PISTON ENGINE, AND METHOD FOR PRODUCING A HEAT EXCHANGER OF AN AXIAL-PISTON MOTOR - The aim of the invention is to improve the efficiency of an axial-piston motor. To this end, the axial-piston motor comprises at least one compressor cylinder, at least one working cylinder and at least one pressure line guiding the compressed fuel from the compressor cylinder to the working cylinder. A working piston comprising a working rod is provided in the working cylinder, and a compressor piston comprising a compressor rod is provided in the compressor cylinder. The axial-piston motor is characterized in that it at least one of the two rods comprises transverse stiffeners. | 05-17-2012 |
| 20080223342 | Two-Stroke Engine with Variable Compression - The invention consists of a two-stroke opposing cylinder engine that includes a length flushing system and two crankshafts ( | 09-18-2008 |
| 20080271715 | Internal combustion barrel engine - A two-stroke barrel engine includes a power output shaft configured to rotate, an even number of cylinders encircling the power output shaft, wherein each cylinder includes opposing first and second power pistons configured to reciprocate within their respective power cylinder, and a pair of non-rotating wobbleplates opposed and hingedly connected to the power pistons. The wobbleplates are configured to transfer the reciprocating motion of the power pistons to rotary motion of the power output shaft via a nutating motion of the non-rotating wobbleplate. | 11-06-2008 |
| 20100186723 | TWO-CYCLE, OPPOSED-PISTON INTERNAL COMBUSTION ENGINE - In a two-stroke, opposed-piston internal combustion engine with optimized cooling and no engine block, opposed pistons protrude from the bore during at least a portion of an operating cycle of the engine and are cooled by application of a liquid coolant to their interiors. | 07-29-2010 |
| 20120125298 | Two stroke opposed-piston engines with compression release for engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with a decompression port including a valve and a passage with an opening through the cylinder wall that is located between the cylinder's intake and exhaust ports. The decompression port enables release of compressed air from the cylinder after the intake and exhaust ports are closed. The valve is opened to permit compressed air to be released from the cylinder through the passage, and closed to retain compressed air in the cylinder. Engine braking is supported by release of compressed air through the decompression port into an exhaust channel when the pistons are at or near top dead center positions as the cycle transitions from the intake/compression stroke to the power/exhaust stroke. Compression release from the cylinder after intake and exhaust port closure can also support other engine operations. | 05-24-2012 |
| 20120210985 | Two stroke, opposed-piston engines with engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with an engine brake including an engine braking valve that can be opened to release air from the cylinder as the pistons cycle between BDC and TDC positions. | 08-23-2012 |
| 20140238360 | Rocking Journal Bearings for Two-Stroke Cycle Engines - A rocking journal bearing for a two-stroke cycle engine includes a bearing sleeve having a bearing surface with a plurality of axially-spaced, eccentrically-disposed surface segments and a rocking journal having a plurality of axially-spaced, eccentrically-disposed journal segments. The rocking journal is retained for rocking oscillation on the bearing surface. Space for receiving oil is provided in the rocking journal and oil delivery outlets acting through the journal segments deliver received oil to the bearing surfaces. | 08-28-2014 |
| 20140373814 | Air Handling Control for Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 12-25-2014 |
| 20140373815 | Trapped Burned Gas Fraction Control for Opposed-Piston Engines with Uniflow Scavenging - A trapped burned gas fraction is controlled in a two-stroke cycle opposed-piston engine with uniflow scavenging by adjusting an external EGR setpoint in real time. The adjusted setpoint is used to control EGR flow in the engine's air handling system. | 12-25-2014 |
| 20140373816 | System and Method for Air Handling Control in Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, repeatable trapped mass and composition are achieved by determining provision of air handling setpoints that control operation of the engine's air handling system components. In some aspects, these setpoints govern operations of the air handling system by actively controlling the intake manifold pressure (IMP), EGR flow, and exhaust channel backpressure. | 12-25-2014 |
| 20160025002 | IMPROVED OPPOSED PISTON ENGINE - The invention relates to an opposed piston engine comprising at least one cylinder, at least two pistons arranged to be reciprocated within the same cylinder in an opposed manner, at least one intake port through the cylinder wall, at least one exhaust port through the cylinder wall, at least one shaft arranged to be rotated by reciprocal motion of the opposed pistons, at least one reciprocatable sleeve valve within the cylinder for controlling porting of one or both of the at least one intake port and the at least one exhaust port, a sleeve valve driving mechanism for controlling reciprocal motion of the at least one sleeve valve, and a dwell mechanism. The dwell mechanism is configured to induce at least one period of dwell of the at least two pistons during their respective cycles of piston motion. | 01-28-2016 |
| 20160032822 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis, a first inlet port, and a first exhaust port. First pistons are slidably disposed within the first cylinder and are movable toward one another and away from one another. The engine additionally includes a second cylinder having a second longitudinal axis, a second inlet port, and a second exhaust port. The second cylinder is disposed adjacent to the first cylinder with the second inlet port being aligned with the first exhaust port in a first direction extending substantially perpendicular to the first longitudinal axis and the second longitudinal axis, and the second exhaust port being aligned with the first inlet port in the first direction. Second pistons are slidably disposed within the second cylinder and are movable toward one and away from one another. | 02-04-2016 |
| 20160032823 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis and a first pair of pistons slidably disposed within the first cylinder and movable toward one another in a first mode of operation and away from one another in a second mode of operation. The engine additionally includes a second cylinder having a second longitudinal axis and a second pair of pistons slidably disposed within the second cylinder and movable toward one another in the first mode of operation and away from one another in the second mode of operation. A crankshaft is connected to at least one of the first pair of pistons and at least one of the second pair of pistons and has an axis of rotation. The axis of rotation is disposed between and is substantially perpendicular to the first longitudinal axis and the second longitudinal axis. | 02-04-2016 |
| 20160069293 | OPPOSED PISTON TWO-STROKE ENGINE WITH THERMAL BARRIER - In one configuration, the present disclosure provides a cylinder including a first housing, a second housing, and an insert. The first housing includes a first body portion and a first collar portion. The first body portion has a first inner diameter, and the first collar portion has a second inner diameter that is greater than the first inner diameter. The second housing includes a second body portion and a second collar portion. The second body portion has a third inner diameter and the second collar portion has a fourth inner diameter that is greater than the third inner diameter. The second housing is coupled to the first housing such that the first and second collared portions cooperate to form an annular channel. The insert is disposed within the annular channel formed by the first and second collared portions. | 03-10-2016 |
| 20160076468 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 03-17-2016 |
| 20160252004 | HYBRID OPPOSED-PISTON ENGINE SYSTEM | 09-01-2016 |
| 20100282219 | MONOBLOCK VALVELESS OPPOSING PISTON INTERNAL COMBUSTION ENGINE - The present invention provides an internal combustion engine that provides advantages of both typical 2-stroke engines and typical 4-stroke engines, but using a new design unlike either. The present engine provides for use of pistons as means for opening and closing intake and exhaust ports disposed on cylinder walls. It also provides two pistons per cylinder in an opposing configuration, such that one fuel explosion event causes motion of both pistons per cylinder, in opposite directions. Each piston of a cylinder is connected to a separate crankshaft, which completes a single revolution about its axis per fuel explosion event in a cylinder. In a single cycle of piston movement along the cylinder, a full cycle of ignition, exhaust, intake, and compression is achieved. | 11-11-2010 |
| 20130239930 | DUAL CRANKSHAFT ENGINE - A dual-crankshaft engine is presented. In one embodiment, the engine includes a first crankshaft and a second crankshaft. The second crankshaft is coupled with the first crankshaft such that the first crankshaft and the second crankshaft are horizontally coplanar. The engine further includes a first piston that is operable to reciprocate in a first horizontal cylinder via coupling with the first crankshaft, and a second piston that is operable to reciprocate in a second horizontal cylinder via coupling with the second crankshaft. The second horizontal cylinder is horizontally collinear with and opposing the first horizontal cylinder. | 09-19-2013 |
| 20140261338 | In-Line Six Internal Combustion Engine - One non-limiting object of the present invention is to provide modifications to conventional in line 6 cylinder engines capable of increasing their efficiency in operation. This includes modifying the central two adjacent piston and cylinder assemblies of the engines. The modifications involve (1) changing the camshaft so that the central two adjacent piston and cylinder assemblies have their four stroke cycles in phase rather than 180° out of phase, (2) providing a communicating passage between the combustion chambers of the central two piston and cylinder assemblies and (3) modifying either the hardware or programming for the control of the fuel injectors of the central two piston and cylinder assemblies so that they can be selectively controlled not to inject fuel during the operation cycle thereof. The modifications contemplates providing a new cam shaft in which not only the cams relating to the central two adjacent piston and cylinder assemblies are modified to change 180° out of phase to in phase, but the cams relating to other piston and cylinder assemblies in order to provide a somewhat balanced application of the driving forces during each cycle. | 09-18-2014 |
| 20130220281 | METHOD, ENGINE CYLINDER, AND ENGINE WITH OPPOSED SEMI-LOOP SCAVENGING - A method for the reverse scavenging of an engine cylinder and for the introduction of fresh gas into the cylinder and for the discharge of exhaust gas out of the cylinder. The cylinder has oppositely disposed and opposingly driven pistons. In the region of the respective bottom dead center (BDC) of the two pistons, there are formed in the cylinder wall in each case one outlet region for the exhaust gas and in each case one, in particular circumferentially opposite flow transfer region for pre-compressed fresh gas which has been admitted from the crankcase. The fresh gas supplied through the respective flow transfer region is expelled in the direction of the wall region which is situated on that side of the cylinder inner wall and which adjoins the flow transfer region in the cylinder longitudinal direction. | 08-29-2013 |
| 20090165754 | Two-stroke Opposed Cylinder Internal Combustion Engine with Integrated Positive Displacement Supercharger and Regenerator. - A two-stroke internal combustion engine ( | 07-02-2009 |
| 20100192923 | INTERNAL COMBUSTION ENGINES - The invention provides a 2-stroke internal combustion engine comprising two opposed cylinders, each cylinder housing two opposed pistons and having at least one exhaust port and at least one intake port, and a crankshaft having asymmetrically arranged journals and scotch-yoke mechanisms for driving the journals from the pistons. The pistons in each cylinder operate to open its exhaust port or ports before its intake port or ports and to close its exhaust port or ports before its intake port or ports. | 08-05-2010 |
| 20120204841 | Opposed-Piston, Opposed-Cylinder Engine With Collinear Cylinders - An opposed-piston, opposed-cylinder OPOC engine is disclosed in which the central axis of the two cylinders is collinear. In four-stroke engines, this is possible with a built up crankshaft. Disclosed are connecting rod configurations that are suitable for a two-stroke engine that can be assembled to a unitary crankshaft, including both pullrods in tension and pushrods in compression. The configuration includes pistons arranged symmetrically, but with offset timing of the intake and exhaust pistons. The offset timing leads to a slight imbalance which can partially overcome by having the center of gravity of the crankshaft offset from the axis of rotation. | 08-16-2012 |
| 20130133627 | RECIPROCATING PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 05-30-2013 |
| 20160090900 | Multi-Cylinder Opposed Stepped Piston Engine - With reference to FIG. | 03-31-2016 |
| 123051000 | Four-cycle | 5 |
| 20080210204 | Internal combustion engine - A piston of an internal combustion engine includes a cavity for gases passing a piston ring and a first flow path leading from the cavity to a piston ring region and a second flow path extending from the cavity to an outlet opening for removing gases to an inlet opening in a cylinder wall in at least one piston position. | 09-04-2008 |
| 20080245345 | Oscillating Piston Engine - An oscillating piston engine comprises an internal combustion engine part having a housing part in which there are arranged a first and at least a second piston which can jointly revolve in the housing part about an axis of rotation fixed in relation to the housing and which, when revolving about the axis of rotation, perform reciprocating oscillating movements in opposition to one another about an axis of oscillation extending perpendicularly to the axis of rotation. The first piston has a first end face and the at least second piston has a second end face facing the first end face, the end faces delimiting a working chamber in the direction of oscillation of the pistons. The internal combustion engine part is adjoined in the direction of the axis of rotation by an electromotive part having at least one rotor which is arranged concentrically with the axis of rotation and which is arranged in a housing part adjoining the housing part of the internal combustion engine part. | 10-09-2008 |
| 20090090334 | Opposed piston electromagnetic engine - An engine includes a cylinder having a two pistons slidably disposed therein, a port arranged to admit a reactant into the cylinder between the two pistons, and a converter operable with at least one piston to convert mechanical energy of the piston to electrical energy. | 04-09-2009 |
| 20100071671 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20100147269 | Internal Combustion Engine With Optimal Bore-To-Stroke Ratio - An internal combustion engine. The engine includes at least one cylinder having a bore diameter, a piston for traveling within each cylinder between a first position and a second position, wherein the distance between the first position and the second position defines a stroke length, and thermal barriers on the surfaces of the combustion chamber near top dead center. In one embodiment, the engine utilizes asymmetric effective compression and expansion strokes. To maximize efficiency of the engine, a ratio of the bore diameter to stroke length of the internal combustion engine comprises a range between 0.5 to 1.0. | 06-17-2010 |
| 20100212637 | Cylinder and piston assemblies for opposed piston engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 08-26-2010 |
| 20100212638 | Opposed piston engines with controlled provision of lubricant for lubrication and cooling - In multi-cylinder opposed engine constructions provision of lubricant for lubricating bearings, for cooling cylinders, and for cooling pistons includes pumping an inlet stream of lubricant through a gallery in the engine that is in fluid communication with bearing lubricant passages and cylinder coolant passages and providing lubricant from the inlet stream of lubricant into at least one piston coolant manifold in response to a first engine operating condition. | 08-26-2010 |
| 20100229836 | GUIDED BRIDGE FOR A PISTON IN AN INTERNAL COMBUSTION ENGINE - An improved configuration for internal combustion engine that reduces side forces on pistons during the engine cycle. The improvement is an intermediate and guided bridge element located between pull rods and pistons with articulated connections that allow side forces to be dissipated away from the pistons. | 09-16-2010 |
| 20100319661 | Cylinder-Mounted oil wiper for an opposed piston engine - A ported cylinder for a diesel engine includes a circular groove in the bore, located on the outside of respective port. An oil wiper ring or a group of oil wiper rings is seated in the circular groove for wiping excess lubricating oil from a piston surface. A compressing ring is disposed between the oil wiper ring or group of oil wiper rings and the floor of the circular groove to urge the oil wiper rings into contact with the piston surface. An oil wiper ring construction includes a major surface with oil-conducting channels. | 12-23-2010 |
| 20110083644 | Engine Having Opposed Pistons and Opposed Cylinders and Side Dual Power Output Shafts - An engine having axial inline pistons connected to side power output shafts is disclosed. The engine includes a cylinder defining an interior space of the cylinder; a first piston that reciprocates in the interior space of the cylinder wherein the first piston has a first end forming a first piston head; a first piston rod attached to the first piston at a second end of the first piston opposite the first end of the first piston; a second piston that reciprocates in the interior space of the cylinder, wherein the second piston has a first end forming a second piston head; a second piston rod attached to the second piston at a second end of the second piston opposite the first end of the second piston; a first connecting rod connected to the first piston rod and coupled to a first power output shaft; and a second connecting rod connected to the second piston rod and coupled to the first power output shaft. The first piston head and the second piston head define a combustion chamber in the cylinder between the first piston head and the second piston head, and the first piston head and the second piston head move away from each other on a first power stroke of the first piston and a second power stroke of the second piston. | 04-14-2011 |
| 20110100334 | FUEL INJECTION SYSTEM - An engine includes a first piston with surfaces that define a substantially cylindrical chamber inside the first piston and a passage into the substantially cylindrical chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical chamber and to define, in cooperation with the substantially cylindrical chamber, a combustion chamber. A fuel injector extends at least partially through the passage in the first piston to inject fuel into the combustion chamber. The first piston is arranged to move in a reciprocating manner relative to the fuel injector. | 05-05-2011 |
| 20110132333 | INTERNAL COMBUSTION ENGINE WITH WORKING, PISTON AND CONTROL PISTON - The invention relates to an internal combustion engine comprising two opposed pistons sharing the same cylinder (FIG. | 06-09-2011 |
| 20110146629 | INTERNAL PRESSURE DRIVEN ENGINE - An internal combustion engine or other internal pressure driven engine of the type capable of converting reciprocal linear powered motion into unidirectional rotary motion, the engine having at least one pair of first and second cylinders with each cylinder having a pair of opposed pistons therein forming a pressure chamber therebetween. Outer ends of each piston carries a piston rod connected to a pivot arm of a respective one way clutch which causes the clutch to oscillate back and forth when the piston moves in and out due to pressure or combustion in the pressure chamber. Alternatively, the piston rods may be configured as gear racks in direct operative engagement with pinion gears of the one way clutches. The clutches are parallel and spaced apart from each other near each end of the cylinders. Each clutch carries a gear on one end which intermeshes with a gear rack assembly having gears and a gear rack which drives a crankshaft and auxiliary flywheel operatively connected to a starter. Once the starter is turned on the kinetic energy of the flywheel and gear rack keeps the on/off clutches in continuous oscillation. The oscillating clutches turn unidirectional drive shafts connected through pinion gears to a main output shaft and main flywheel. | 06-23-2011 |
| 20110186017 | Single-crankshaft, opposed-piston engine constructions - Ported engines with opposed pistons are coupled to a single crankshaft through rocker arm linkages. Each pair of opposed pistons is coupled to a single crankpin of the crankshaft. Each piston is coupled to a respective rocker arm linkage by a rolling thrust bearing which prevents linkage movement that is transverse to the axis of the piston from being transferred to the piston. Each piston of a pair of opposed pistons is coupled to the same crankpin by respective rocker arm linkages in which connecting rods run between the crankpin and respective rocker arms. One connecting rod is connected to first rocker arm below the rocker arm's pivot point and another connecting rod is connected to a second rocker arm above the rocker arm's pivot point. | 08-04-2011 |
| 20110259304 | FUEL INJECTION SYSTEM - An engine includes a fuel injector support element to support a fuel injector and define a first opening through which the fuel injector can inject fuel. A first piston defines a substantially cylindrical inner chamber and a portal into the substantially cylindrical inner chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical inner chamber and to define, in cooperation with the substantially cylindrical inner chamber, a combustion chamber. The first fuel injector support element and the first piston are arranged such that, during engine operation, the first piston reciprocates relative to the first fuel injector support element to thereby cause the first opening and the first portal to move in and out of alignment with one another. | 10-27-2011 |
| 20120031379 | Horizontally Opposed Center Fired Engine - The horizontally opposed center fired engine improves on the traditional design of the horizontally opposed engines and center fired engines with a better engine geometry. The present invention utilizes four pairs of opposing pistons to compress a larger volume of air-fuel mixture within four different cylinders. The four different cylinders are radially positioned around a center axle in order to achieve a perfectly symmetric engine geometry. The center axle consists of two different shafts spinning in two different directions, which could drastically reduce engine vibrations in the present invention. Engine vibrations are caused by a change in engine speed and result in a loss of energy. Due to the design, the present invention will only experience energy loss in the form of entropy and friction. Thus, the present invention can convert a higher percentage of chemical energy into mechanical energy than any other internal combustion engine. | 02-09-2012 |
| 20120037129 | OPPOSED PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 02-16-2012 |
| 20120037130 | Opposed-piston engine having a single crankshaft coupled to the opposed pistons by linkages with pivoted rocker arms - An opposed-piston engine with a single crankshaft has a rocker-type linkage coupling the crankshaft to the pistons that utilizes a rotatable pivot rocker arm with full-contact plain bearings. A rocker-type linkage utilizes a rotatable pivot bearing with an eccentric aspect to vary translation of piston linkage along the axial direction of a cylinder, which shifts the top dead center (TDC) and bottom dead center (BDC) locations of a piston so as to change the volume of charge air compressed during the power stroke. | 02-16-2012 |
| 20120055451 | Inwardly Opposed Pistons, Fixed Position Common Cylinder Engine with External Induction - An engine with a design for an inwardly opposed-piston, 4 cycle engine with a common, fixed cylinder and external induction system. The present invention features include a fixed, common cylinder in which 2 pistons move towards each other during the cycling of the engine, external, modular, fix mounted induction and exhaust system, multiple power take off shafts as well as additional cylinder/piston bank modularity. The production of such design provides for increased thermal, mechanical and volumetric efficiency as it relates to similar internal combustion engines. | 03-08-2012 |
| 20120186561 | Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston engines - An opposed piston engine includes at least one cylinder with a bore surface and longitudinally-spaced exhaust and intake ports that open through the sidewall of the cylinder. A pair of opposed pistons is disposed in the cylinder for sliding movement along the bore surface. An oil-retaining surface texture pattern in an interface between the pistons and the bore surface extends in a longitudinal direction of the cylinder, aligned with bridges of at least one port. The surface texture pattern includes a plurality of separate recesses on an outside surface of a skirt of each piston. Alternatively, or in addition, the surface texture pattern includes a plurality of separate recesses extending in a longitudinal direction of the cylinder, aligned with bridges of at least one port. | 07-26-2012 |
| 20120192838 | BALANCED FIVE STROKE, FIVE CYLINDER BARREL CAM TYPE INTERNAL COMBUSTION ENGINE - A balanced five-stroke cycle, five cylinder engine, wherein the five cylinders are parallel and arranged around a shaft mounted in a centrally disposed bore in the engine block, wherein the shaft is parallel to the cylinders, wherein power pistons in the cylinders dwell motionless for the intake part of the cycle between the vacuum stroke and the compression stroke of each power piston; induction of the combustion mixture resulting from the partial vacuum created by the vacuum stroke of the power piston, and wherein the position of each power piston is governed by a power piston cam mounted on the shaft, the shaft and bore on the centroidal axis of symmetry of the radially spaced apart array of five cylinders corresponding to the pistons, the opening and closing of exhaust ports governed by an exhaust piston cam mounted on the shaft moving exhaust pistons along the cylinders. | 08-02-2012 |
| 20120279479 | Heat Recycling Internal Combustion Enines - This patent describes two engine designs capable of recycling waste heat. The engines are both theoretically capable of approaching 100% efficiency in converting fuel to motion, although they use the same thermodynamic cycle as much lower efficiency 4 stroke engines. | 11-08-2012 |
| 20120285422 | Dual crankshaft, opposed-opposed-piston engine constructions - A dual-crankshaft, opposed-piston, internal combustion engine includes one or more ported cylinders. Each cylinder has exhaust and intake ports, and the cylinders are juxtaposed and oriented with exhaust and intake ports mutually aligned. The crankshafts are rotatably mounted at respective exhaust and intake ends of the cylinders and are coupled by a multi-gear train. A pair of pistons is disposed for opposed sliding movement in the bore of each cylinder. All of the pistons controlling the exhaust ports are coupled by connecting rods to the crankshaft mounted near at the exhaust ends of the cylinders, and all of the pistons controlling the intake ports are coupled by connecting rods to the crankshaft mounted near at the intake ends of the cylinders. The crankshafts are connected by a timing belt operative to change the rotational timing between the crankshafts. The gear train support structure is stiffened to suppress gear train vibration. | 11-15-2012 |
| 20120298077 | OPPOSED PISTON ENGINE WITH GAS EXCHANGE CONTROL BY MEANS OF HYDROSTATICALLY MOVED SLIDING SLEEVES - An opposed piston engine with gas exchange control using sliding sleeves embodied on their outer periphery as differential pistons that can be operated as slave pistons. A plunger that is displaceable by a cam is used as a master piston. A hydraulic liquid is housed between the master piston and the slave piston in a closed pipe system. The liquid column housed between the master piston and the slave piston can be displaced back and forth by hydrostatic pressure build-up enabling the gas exchange elements to be opened and closed by the sliding sleeves. | 11-29-2012 |
| 20130112175 | Constructions for Piston Thermal Management - A piston construction with an end surface is equipped with a pattern of insulating cavities embedded in an upper end of the piston, between the end surface and interior portions of the piston that are cooled by circulating liquid coolant. | 05-09-2013 |
| 20130199503 | Opposed-piston cylinder bore constructions with solid lubrication in the top ring reversal zones - A cylinder for an opposed-piston engine is equipped with a cylinder bore that provides solid lubrication of bore/piston surface interfaces in top ring reversal zones of the cylinder bore. | 08-08-2013 |
| 20130206113 | METHOD AND MEANS FOR CONTROLLING COMBUSTION - A method of charging an internal combustion engine with a fuel air mixture, the engine having opposed pistons with a combustion chamber therebetween, wherein the method includes forcing induction air during a compression stroke between a first and a second cylinder via a contraction and expansion or a venturi disposed between the first and second pistons. | 08-15-2013 |
| 20130276761 | VARIABLE-COMPRESSION ENGINE ASSEMBLY - Variable-compression engine assemblies with an internal combustion device and a flywheel are presented herein. An engine assembly is disclosed which includes an output shaft and a flywheel, which includes a variable cam surface and is slidably mounted onto the output shaft and rotatable about a flywheel axis. Also included is an internal combustion device with a piston that is movable along a central axis in a cycle between refracted and extended positions. The piston engages the variable cam surface, and the central axis of the piston is spaced from the flywheel axis. The cycle includes a power stroke when the piston moves from the retracted position to the extended position whereby the piston presses against the variable cam surface and thereby rotates the flywheel, and a compression stroke when the piston moves from the extended position to the retracted position responsive to the variable cam surface. | 10-24-2013 |
| 20130276762 | Symmetric Opposed-Piston, Opposed-Cylinder Engine - An opposed-piston, opposed-cylinder engine is disclosed that has the pistons symmetrically arranged in the opposed cylinders. In one embodiment, the inner pistons are exhaust pistons and the outer pistons are intake pistons. Alternatively, the inner pistons are intake pistons and the outer pistons are exhaust pistons. The pistons are coupled to the crankshaft that is situated between the opposed cylinders. Central axes of the two cylinders are offset by a predetermined distance. The connecting rods that couple between the crankshaft and the pistons are arranged adjacent to each other on journals of the crankshaft. The journal to which the pushrods couple is not a split-pin type. Instead, it is one that has a common central axis. Furthermore, the crankshaft is a one-piece or unitary structure. | 10-24-2013 |
| 20140026864 | Cylinder and Piston Assemblies for Opposed Piston Engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 01-30-2014 |
| 20140083396 | Combustion Chamber Constructions for Opposed-Piston Engines - An opposed-piston engine includes a ported cylinder and a pair of pistons disposed to reciprocate in the bore of the cylinder. A combustion chamber is defined by opposing shaped piston end surfaces as the pistons approach respective top dead center (TDC) locations in the bore. At the end of scavenging, the shaped end surfaces of the pistons interact with swirl to produce turbulence in the charge air motion in the combustion chamber; the additional bulk motions include tumble. Fuel is injected into the turbulent charge air motion along a major axis, of the combustion chamber. | 03-27-2014 |
| 20140090625 | Piston Thermal Management in an Opposed-Piston Engine - An opposed-piston engine includes pistons, each piston having an annular cavity in the piston's sidewall and positioned between its crown and ring grooves to block transfer of heat from the crown to the piston body. | 04-03-2014 |
| 20140102418 | OPPOSED PISTON ENGINE WITH NON-COLLINEAR AXES OF TRANSLATION - An opposed piston internal combustion engine can include two opposed pistons ( | 04-17-2014 |
| 20140109877 | Integrated Piston and Bridge - A piston coupled to a crankshaft via pullrods presents challenges for coupling the piston to the crankshaft because the connections are provided outside the piston. A bridge is coupled to a piston skirt at the end of the piston away from the piston crown. The bridge structure includes: a central support structure, a first projection extending outwardly from the central support structure in a first radial direction, and a second projection extending outwardly from the central support structure in a second radial direction. The central support structure is substantially hollow with a series of internal braces to yield a lightweight piston. | 04-24-2014 |
| 20140130780 | INTERNAL COMBUSTION ENGINE - The invention relates to an engine ( | 05-15-2014 |
| 20140196693 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder) and a crankshaft disposed at one end of the cylinder. Within each cylinder there is a pair of opposed, reciprocating pistons that form a combustion chamber ( | 07-17-2014 |
| 20140299109 | Dual Crankshaft, Opposed-Piston Engines With Variable Crank Phasing - The timing or phasing of port openings and closings during operation of an opposed-piston engine is varied in response to changing engine speeds and loads by changing crankshaft phasing. | 10-09-2014 |
| 20150013649 | Combustion Chamber Constructions For Opposed-Piston Engines - A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity. | 01-15-2015 |
| 20150027418 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder and a pair of opposed, reciprocating pistons within the cylinder forming a combustion chamber therebetween. The engine has at least one combustion igniter associated with the cylinder, a portion of the combustion igniter being exposed within the combustion chamber formed between the opposed pistons. | 01-29-2015 |
| 20150114358 | Master and Slave Pullrods - Master and slave pullrods are disclosed in which a master pullrod is coupled to a journal of a crankshaft. The slave pullrod indirectly couples to the crankshaft by coupling to the master pullrod. Such a configuration allows two connecting rods to be coupled to the journal of the crankshaft inline with each other. | 04-30-2015 |
| 20150122227 | Combustion Chamber Construction with Dual Mixing Regions for Opposed-Piston Engines - A combustion chamber construction for opposed-piston engines in which fuel is injected from two opposed injectors includes a dual mixing region construction with a respective mixing region for each injector and a coupling region between the two mixing regions through which the mixing regions communicate. In some aspects, the mixing regions are bulbous and are connected by a waist, or tunnel, region that is relatively narrower than the bulbous mixing chambers. | 05-07-2015 |
| 20160047296 | Mechanism For Varying Crankshaft Timing On A Belt/Chain Driven, Dual Crankshaft Opposed-Piston Engine - A mechanism for varying crankshaft timing on a belt/chain driven, dual crankshaft opposed-piston engine includes sprockets on corresponding ends of the two crankshafts, connected by a belt or chain which is tensioned by two or more tensioners. By changing the position of the tensioners the length of the two spans of the belt/chain are varied and thus the phase between the crankshafts is varied. | 02-18-2016 |
| 20160053674 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 02-25-2016 |
| 20160061106 | CRANKSHAFT FOR AN INTERNAL COMBUSTION ENGINE - An internal combustion engine includes a crankshaft having a first web portion defining an inner opening and defining an undercut proximate the inner opening, a second web portion defining an inner opening and defining an undercut proximate the inner opening and an inner bearing portion that engages with the inner opening of the first web portion and with the inner opening of the second web portion. First and second pushrods each have a piston end and a crankshaft end. The crankshaft ends of the first and second pushrods each have a concave surface placed over different portions of the inner bearing portion between the first and second web portions, and each further have shoulders adjacent their respective concave surface that engage with the undercuts of the first and second web portions. | 03-03-2016 |
| 20160146164 | DEVICE FOR ADMITTING INLET GASES AND/OR RECIRCULATED EXHAUST GASES INTO AN INTERNAL COMBUSTION ENGINE CYLINDER - The invention relates to a device for admitting inlet gases and/or recirculated exhaust gases into an internal combustion engine cylinder, the device comprising a duct designed to supply said cylinder with inlet gases and/or with recirculated exhaust gases, characterized in that said device further comprises, in the duct, a flow control means that can be operated between a first position in which said duct supplies the cylinder with the inlet gases and a second position in which said duct supplies the cylinder with the recirculated exhaust gases. It also relates to the intake module and to the engine equipped therewith. | 05-26-2016 |
| 20160252012 | INTERNAL COMBUSTION ENGINES | 09-01-2016 |
| 20160252013 | Piston Crown and Corresponding Port Geometry | 09-01-2016 |
| 20160252044 | Engine Block Construction For Opposed Piston Engine | 09-01-2016 |
| 20160252065 | Opposed Piston Three Nozzle Combustion Chamber Design | 09-01-2016 |
| 20160252066 | Fuel Injector with Offset Nozzle Angle | 09-01-2016 |
| 20160252067 | Opposed Piston Three Nozzle Piston Bowl Design | 09-01-2016 |
| 20100071670 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20120118272 | AXIAL-PISTON ENGINE, METHOD FOR OPERATING AN AXIAL-PISTON ENGINE, AND METHOD FOR PRODUCING A HEAT EXCHANGER OF AN AXIAL-PISTON MOTOR - The aim of the invention is to improve the efficiency of an axial-piston motor. To this end, the axial-piston motor comprises at least one compressor cylinder, at least one working cylinder and at least one pressure line guiding the compressed fuel from the compressor cylinder to the working cylinder. A working piston comprising a working rod is provided in the working cylinder, and a compressor piston comprising a compressor rod is provided in the compressor cylinder. The axial-piston motor is characterized in that it at least one of the two rods comprises transverse stiffeners. | 05-17-2012 |
| 20080223342 | Two-Stroke Engine with Variable Compression - The invention consists of a two-stroke opposing cylinder engine that includes a length flushing system and two crankshafts ( | 09-18-2008 |
| 20080271715 | Internal combustion barrel engine - A two-stroke barrel engine includes a power output shaft configured to rotate, an even number of cylinders encircling the power output shaft, wherein each cylinder includes opposing first and second power pistons configured to reciprocate within their respective power cylinder, and a pair of non-rotating wobbleplates opposed and hingedly connected to the power pistons. The wobbleplates are configured to transfer the reciprocating motion of the power pistons to rotary motion of the power output shaft via a nutating motion of the non-rotating wobbleplate. | 11-06-2008 |
| 20100186723 | TWO-CYCLE, OPPOSED-PISTON INTERNAL COMBUSTION ENGINE - In a two-stroke, opposed-piston internal combustion engine with optimized cooling and no engine block, opposed pistons protrude from the bore during at least a portion of an operating cycle of the engine and are cooled by application of a liquid coolant to their interiors. | 07-29-2010 |
| 20120125298 | Two stroke opposed-piston engines with compression release for engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with a decompression port including a valve and a passage with an opening through the cylinder wall that is located between the cylinder's intake and exhaust ports. The decompression port enables release of compressed air from the cylinder after the intake and exhaust ports are closed. The valve is opened to permit compressed air to be released from the cylinder through the passage, and closed to retain compressed air in the cylinder. Engine braking is supported by release of compressed air through the decompression port into an exhaust channel when the pistons are at or near top dead center positions as the cycle transitions from the intake/compression stroke to the power/exhaust stroke. Compression release from the cylinder after intake and exhaust port closure can also support other engine operations. | 05-24-2012 |
| 20120210985 | Two stroke, opposed-piston engines with engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with an engine brake including an engine braking valve that can be opened to release air from the cylinder as the pistons cycle between BDC and TDC positions. | 08-23-2012 |
| 20140238360 | Rocking Journal Bearings for Two-Stroke Cycle Engines - A rocking journal bearing for a two-stroke cycle engine includes a bearing sleeve having a bearing surface with a plurality of axially-spaced, eccentrically-disposed surface segments and a rocking journal having a plurality of axially-spaced, eccentrically-disposed journal segments. The rocking journal is retained for rocking oscillation on the bearing surface. Space for receiving oil is provided in the rocking journal and oil delivery outlets acting through the journal segments deliver received oil to the bearing surfaces. | 08-28-2014 |
| 20140373814 | Air Handling Control for Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 12-25-2014 |
| 20140373815 | Trapped Burned Gas Fraction Control for Opposed-Piston Engines with Uniflow Scavenging - A trapped burned gas fraction is controlled in a two-stroke cycle opposed-piston engine with uniflow scavenging by adjusting an external EGR setpoint in real time. The adjusted setpoint is used to control EGR flow in the engine's air handling system. | 12-25-2014 |
| 20140373816 | System and Method for Air Handling Control in Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, repeatable trapped mass and composition are achieved by determining provision of air handling setpoints that control operation of the engine's air handling system components. In some aspects, these setpoints govern operations of the air handling system by actively controlling the intake manifold pressure (IMP), EGR flow, and exhaust channel backpressure. | 12-25-2014 |
| 20160025002 | IMPROVED OPPOSED PISTON ENGINE - The invention relates to an opposed piston engine comprising at least one cylinder, at least two pistons arranged to be reciprocated within the same cylinder in an opposed manner, at least one intake port through the cylinder wall, at least one exhaust port through the cylinder wall, at least one shaft arranged to be rotated by reciprocal motion of the opposed pistons, at least one reciprocatable sleeve valve within the cylinder for controlling porting of one or both of the at least one intake port and the at least one exhaust port, a sleeve valve driving mechanism for controlling reciprocal motion of the at least one sleeve valve, and a dwell mechanism. The dwell mechanism is configured to induce at least one period of dwell of the at least two pistons during their respective cycles of piston motion. | 01-28-2016 |
| 20160032822 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis, a first inlet port, and a first exhaust port. First pistons are slidably disposed within the first cylinder and are movable toward one another and away from one another. The engine additionally includes a second cylinder having a second longitudinal axis, a second inlet port, and a second exhaust port. The second cylinder is disposed adjacent to the first cylinder with the second inlet port being aligned with the first exhaust port in a first direction extending substantially perpendicular to the first longitudinal axis and the second longitudinal axis, and the second exhaust port being aligned with the first inlet port in the first direction. Second pistons are slidably disposed within the second cylinder and are movable toward one and away from one another. | 02-04-2016 |
| 20160032823 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis and a first pair of pistons slidably disposed within the first cylinder and movable toward one another in a first mode of operation and away from one another in a second mode of operation. The engine additionally includes a second cylinder having a second longitudinal axis and a second pair of pistons slidably disposed within the second cylinder and movable toward one another in the first mode of operation and away from one another in the second mode of operation. A crankshaft is connected to at least one of the first pair of pistons and at least one of the second pair of pistons and has an axis of rotation. The axis of rotation is disposed between and is substantially perpendicular to the first longitudinal axis and the second longitudinal axis. | 02-04-2016 |
| 20160069293 | OPPOSED PISTON TWO-STROKE ENGINE WITH THERMAL BARRIER - In one configuration, the present disclosure provides a cylinder including a first housing, a second housing, and an insert. The first housing includes a first body portion and a first collar portion. The first body portion has a first inner diameter, and the first collar portion has a second inner diameter that is greater than the first inner diameter. The second housing includes a second body portion and a second collar portion. The second body portion has a third inner diameter and the second collar portion has a fourth inner diameter that is greater than the third inner diameter. The second housing is coupled to the first housing such that the first and second collared portions cooperate to form an annular channel. The insert is disposed within the annular channel formed by the first and second collared portions. | 03-10-2016 |
| 20160076468 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 03-17-2016 |
| 20160252004 | HYBRID OPPOSED-PISTON ENGINE SYSTEM | 09-01-2016 |
| 20100282219 | MONOBLOCK VALVELESS OPPOSING PISTON INTERNAL COMBUSTION ENGINE - The present invention provides an internal combustion engine that provides advantages of both typical 2-stroke engines and typical 4-stroke engines, but using a new design unlike either. The present engine provides for use of pistons as means for opening and closing intake and exhaust ports disposed on cylinder walls. It also provides two pistons per cylinder in an opposing configuration, such that one fuel explosion event causes motion of both pistons per cylinder, in opposite directions. Each piston of a cylinder is connected to a separate crankshaft, which completes a single revolution about its axis per fuel explosion event in a cylinder. In a single cycle of piston movement along the cylinder, a full cycle of ignition, exhaust, intake, and compression is achieved. | 11-11-2010 |
| 20130239930 | DUAL CRANKSHAFT ENGINE - A dual-crankshaft engine is presented. In one embodiment, the engine includes a first crankshaft and a second crankshaft. The second crankshaft is coupled with the first crankshaft such that the first crankshaft and the second crankshaft are horizontally coplanar. The engine further includes a first piston that is operable to reciprocate in a first horizontal cylinder via coupling with the first crankshaft, and a second piston that is operable to reciprocate in a second horizontal cylinder via coupling with the second crankshaft. The second horizontal cylinder is horizontally collinear with and opposing the first horizontal cylinder. | 09-19-2013 |
| 20140261338 | In-Line Six Internal Combustion Engine - One non-limiting object of the present invention is to provide modifications to conventional in line 6 cylinder engines capable of increasing their efficiency in operation. This includes modifying the central two adjacent piston and cylinder assemblies of the engines. The modifications involve (1) changing the camshaft so that the central two adjacent piston and cylinder assemblies have their four stroke cycles in phase rather than 180° out of phase, (2) providing a communicating passage between the combustion chambers of the central two piston and cylinder assemblies and (3) modifying either the hardware or programming for the control of the fuel injectors of the central two piston and cylinder assemblies so that they can be selectively controlled not to inject fuel during the operation cycle thereof. The modifications contemplates providing a new cam shaft in which not only the cams relating to the central two adjacent piston and cylinder assemblies are modified to change 180° out of phase to in phase, but the cams relating to other piston and cylinder assemblies in order to provide a somewhat balanced application of the driving forces during each cycle. | 09-18-2014 |
| 20130220281 | METHOD, ENGINE CYLINDER, AND ENGINE WITH OPPOSED SEMI-LOOP SCAVENGING - A method for the reverse scavenging of an engine cylinder and for the introduction of fresh gas into the cylinder and for the discharge of exhaust gas out of the cylinder. The cylinder has oppositely disposed and opposingly driven pistons. In the region of the respective bottom dead center (BDC) of the two pistons, there are formed in the cylinder wall in each case one outlet region for the exhaust gas and in each case one, in particular circumferentially opposite flow transfer region for pre-compressed fresh gas which has been admitted from the crankcase. The fresh gas supplied through the respective flow transfer region is expelled in the direction of the wall region which is situated on that side of the cylinder inner wall and which adjoins the flow transfer region in the cylinder longitudinal direction. | 08-29-2013 |
| 20090165754 | Two-stroke Opposed Cylinder Internal Combustion Engine with Integrated Positive Displacement Supercharger and Regenerator. - A two-stroke internal combustion engine ( | 07-02-2009 |
| 20100192923 | INTERNAL COMBUSTION ENGINES - The invention provides a 2-stroke internal combustion engine comprising two opposed cylinders, each cylinder housing two opposed pistons and having at least one exhaust port and at least one intake port, and a crankshaft having asymmetrically arranged journals and scotch-yoke mechanisms for driving the journals from the pistons. The pistons in each cylinder operate to open its exhaust port or ports before its intake port or ports and to close its exhaust port or ports before its intake port or ports. | 08-05-2010 |
| 20120204841 | Opposed-Piston, Opposed-Cylinder Engine With Collinear Cylinders - An opposed-piston, opposed-cylinder OPOC engine is disclosed in which the central axis of the two cylinders is collinear. In four-stroke engines, this is possible with a built up crankshaft. Disclosed are connecting rod configurations that are suitable for a two-stroke engine that can be assembled to a unitary crankshaft, including both pullrods in tension and pushrods in compression. The configuration includes pistons arranged symmetrically, but with offset timing of the intake and exhaust pistons. The offset timing leads to a slight imbalance which can partially overcome by having the center of gravity of the crankshaft offset from the axis of rotation. | 08-16-2012 |
| 20130133627 | RECIPROCATING PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 05-30-2013 |
| 20160090900 | Multi-Cylinder Opposed Stepped Piston Engine - With reference to FIG. | 03-31-2016 |
| 123051000 | Four-cycle separate crankshaft for piston | 3 |
| 20080210204 | Internal combustion engine - A piston of an internal combustion engine includes a cavity for gases passing a piston ring and a first flow path leading from the cavity to a piston ring region and a second flow path extending from the cavity to an outlet opening for removing gases to an inlet opening in a cylinder wall in at least one piston position. | 09-04-2008 |
| 20080245345 | Oscillating Piston Engine - An oscillating piston engine comprises an internal combustion engine part having a housing part in which there are arranged a first and at least a second piston which can jointly revolve in the housing part about an axis of rotation fixed in relation to the housing and which, when revolving about the axis of rotation, perform reciprocating oscillating movements in opposition to one another about an axis of oscillation extending perpendicularly to the axis of rotation. The first piston has a first end face and the at least second piston has a second end face facing the first end face, the end faces delimiting a working chamber in the direction of oscillation of the pistons. The internal combustion engine part is adjoined in the direction of the axis of rotation by an electromotive part having at least one rotor which is arranged concentrically with the axis of rotation and which is arranged in a housing part adjoining the housing part of the internal combustion engine part. | 10-09-2008 |
| 20090090334 | Opposed piston electromagnetic engine - An engine includes a cylinder having a two pistons slidably disposed therein, a port arranged to admit a reactant into the cylinder between the two pistons, and a converter operable with at least one piston to convert mechanical energy of the piston to electrical energy. | 04-09-2009 |
| 20100071671 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20100147269 | Internal Combustion Engine With Optimal Bore-To-Stroke Ratio - An internal combustion engine. The engine includes at least one cylinder having a bore diameter, a piston for traveling within each cylinder between a first position and a second position, wherein the distance between the first position and the second position defines a stroke length, and thermal barriers on the surfaces of the combustion chamber near top dead center. In one embodiment, the engine utilizes asymmetric effective compression and expansion strokes. To maximize efficiency of the engine, a ratio of the bore diameter to stroke length of the internal combustion engine comprises a range between 0.5 to 1.0. | 06-17-2010 |
| 20100212637 | Cylinder and piston assemblies for opposed piston engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 08-26-2010 |
| 20100212638 | Opposed piston engines with controlled provision of lubricant for lubrication and cooling - In multi-cylinder opposed engine constructions provision of lubricant for lubricating bearings, for cooling cylinders, and for cooling pistons includes pumping an inlet stream of lubricant through a gallery in the engine that is in fluid communication with bearing lubricant passages and cylinder coolant passages and providing lubricant from the inlet stream of lubricant into at least one piston coolant manifold in response to a first engine operating condition. | 08-26-2010 |
| 20100229836 | GUIDED BRIDGE FOR A PISTON IN AN INTERNAL COMBUSTION ENGINE - An improved configuration for internal combustion engine that reduces side forces on pistons during the engine cycle. The improvement is an intermediate and guided bridge element located between pull rods and pistons with articulated connections that allow side forces to be dissipated away from the pistons. | 09-16-2010 |
| 20100319661 | Cylinder-Mounted oil wiper for an opposed piston engine - A ported cylinder for a diesel engine includes a circular groove in the bore, located on the outside of respective port. An oil wiper ring or a group of oil wiper rings is seated in the circular groove for wiping excess lubricating oil from a piston surface. A compressing ring is disposed between the oil wiper ring or group of oil wiper rings and the floor of the circular groove to urge the oil wiper rings into contact with the piston surface. An oil wiper ring construction includes a major surface with oil-conducting channels. | 12-23-2010 |
| 20110083644 | Engine Having Opposed Pistons and Opposed Cylinders and Side Dual Power Output Shafts - An engine having axial inline pistons connected to side power output shafts is disclosed. The engine includes a cylinder defining an interior space of the cylinder; a first piston that reciprocates in the interior space of the cylinder wherein the first piston has a first end forming a first piston head; a first piston rod attached to the first piston at a second end of the first piston opposite the first end of the first piston; a second piston that reciprocates in the interior space of the cylinder, wherein the second piston has a first end forming a second piston head; a second piston rod attached to the second piston at a second end of the second piston opposite the first end of the second piston; a first connecting rod connected to the first piston rod and coupled to a first power output shaft; and a second connecting rod connected to the second piston rod and coupled to the first power output shaft. The first piston head and the second piston head define a combustion chamber in the cylinder between the first piston head and the second piston head, and the first piston head and the second piston head move away from each other on a first power stroke of the first piston and a second power stroke of the second piston. | 04-14-2011 |
| 20110100334 | FUEL INJECTION SYSTEM - An engine includes a first piston with surfaces that define a substantially cylindrical chamber inside the first piston and a passage into the substantially cylindrical chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical chamber and to define, in cooperation with the substantially cylindrical chamber, a combustion chamber. A fuel injector extends at least partially through the passage in the first piston to inject fuel into the combustion chamber. The first piston is arranged to move in a reciprocating manner relative to the fuel injector. | 05-05-2011 |
| 20110132333 | INTERNAL COMBUSTION ENGINE WITH WORKING, PISTON AND CONTROL PISTON - The invention relates to an internal combustion engine comprising two opposed pistons sharing the same cylinder (FIG. | 06-09-2011 |
| 20110146629 | INTERNAL PRESSURE DRIVEN ENGINE - An internal combustion engine or other internal pressure driven engine of the type capable of converting reciprocal linear powered motion into unidirectional rotary motion, the engine having at least one pair of first and second cylinders with each cylinder having a pair of opposed pistons therein forming a pressure chamber therebetween. Outer ends of each piston carries a piston rod connected to a pivot arm of a respective one way clutch which causes the clutch to oscillate back and forth when the piston moves in and out due to pressure or combustion in the pressure chamber. Alternatively, the piston rods may be configured as gear racks in direct operative engagement with pinion gears of the one way clutches. The clutches are parallel and spaced apart from each other near each end of the cylinders. Each clutch carries a gear on one end which intermeshes with a gear rack assembly having gears and a gear rack which drives a crankshaft and auxiliary flywheel operatively connected to a starter. Once the starter is turned on the kinetic energy of the flywheel and gear rack keeps the on/off clutches in continuous oscillation. The oscillating clutches turn unidirectional drive shafts connected through pinion gears to a main output shaft and main flywheel. | 06-23-2011 |
| 20110186017 | Single-crankshaft, opposed-piston engine constructions - Ported engines with opposed pistons are coupled to a single crankshaft through rocker arm linkages. Each pair of opposed pistons is coupled to a single crankpin of the crankshaft. Each piston is coupled to a respective rocker arm linkage by a rolling thrust bearing which prevents linkage movement that is transverse to the axis of the piston from being transferred to the piston. Each piston of a pair of opposed pistons is coupled to the same crankpin by respective rocker arm linkages in which connecting rods run between the crankpin and respective rocker arms. One connecting rod is connected to first rocker arm below the rocker arm's pivot point and another connecting rod is connected to a second rocker arm above the rocker arm's pivot point. | 08-04-2011 |
| 20110259304 | FUEL INJECTION SYSTEM - An engine includes a fuel injector support element to support a fuel injector and define a first opening through which the fuel injector can inject fuel. A first piston defines a substantially cylindrical inner chamber and a portal into the substantially cylindrical inner chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical inner chamber and to define, in cooperation with the substantially cylindrical inner chamber, a combustion chamber. The first fuel injector support element and the first piston are arranged such that, during engine operation, the first piston reciprocates relative to the first fuel injector support element to thereby cause the first opening and the first portal to move in and out of alignment with one another. | 10-27-2011 |
| 20120031379 | Horizontally Opposed Center Fired Engine - The horizontally opposed center fired engine improves on the traditional design of the horizontally opposed engines and center fired engines with a better engine geometry. The present invention utilizes four pairs of opposing pistons to compress a larger volume of air-fuel mixture within four different cylinders. The four different cylinders are radially positioned around a center axle in order to achieve a perfectly symmetric engine geometry. The center axle consists of two different shafts spinning in two different directions, which could drastically reduce engine vibrations in the present invention. Engine vibrations are caused by a change in engine speed and result in a loss of energy. Due to the design, the present invention will only experience energy loss in the form of entropy and friction. Thus, the present invention can convert a higher percentage of chemical energy into mechanical energy than any other internal combustion engine. | 02-09-2012 |
| 20120037129 | OPPOSED PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 02-16-2012 |
| 20120037130 | Opposed-piston engine having a single crankshaft coupled to the opposed pistons by linkages with pivoted rocker arms - An opposed-piston engine with a single crankshaft has a rocker-type linkage coupling the crankshaft to the pistons that utilizes a rotatable pivot rocker arm with full-contact plain bearings. A rocker-type linkage utilizes a rotatable pivot bearing with an eccentric aspect to vary translation of piston linkage along the axial direction of a cylinder, which shifts the top dead center (TDC) and bottom dead center (BDC) locations of a piston so as to change the volume of charge air compressed during the power stroke. | 02-16-2012 |
| 20120055451 | Inwardly Opposed Pistons, Fixed Position Common Cylinder Engine with External Induction - An engine with a design for an inwardly opposed-piston, 4 cycle engine with a common, fixed cylinder and external induction system. The present invention features include a fixed, common cylinder in which 2 pistons move towards each other during the cycling of the engine, external, modular, fix mounted induction and exhaust system, multiple power take off shafts as well as additional cylinder/piston bank modularity. The production of such design provides for increased thermal, mechanical and volumetric efficiency as it relates to similar internal combustion engines. | 03-08-2012 |
| 20120186561 | Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston engines - An opposed piston engine includes at least one cylinder with a bore surface and longitudinally-spaced exhaust and intake ports that open through the sidewall of the cylinder. A pair of opposed pistons is disposed in the cylinder for sliding movement along the bore surface. An oil-retaining surface texture pattern in an interface between the pistons and the bore surface extends in a longitudinal direction of the cylinder, aligned with bridges of at least one port. The surface texture pattern includes a plurality of separate recesses on an outside surface of a skirt of each piston. Alternatively, or in addition, the surface texture pattern includes a plurality of separate recesses extending in a longitudinal direction of the cylinder, aligned with bridges of at least one port. | 07-26-2012 |
| 20120192838 | BALANCED FIVE STROKE, FIVE CYLINDER BARREL CAM TYPE INTERNAL COMBUSTION ENGINE - A balanced five-stroke cycle, five cylinder engine, wherein the five cylinders are parallel and arranged around a shaft mounted in a centrally disposed bore in the engine block, wherein the shaft is parallel to the cylinders, wherein power pistons in the cylinders dwell motionless for the intake part of the cycle between the vacuum stroke and the compression stroke of each power piston; induction of the combustion mixture resulting from the partial vacuum created by the vacuum stroke of the power piston, and wherein the position of each power piston is governed by a power piston cam mounted on the shaft, the shaft and bore on the centroidal axis of symmetry of the radially spaced apart array of five cylinders corresponding to the pistons, the opening and closing of exhaust ports governed by an exhaust piston cam mounted on the shaft moving exhaust pistons along the cylinders. | 08-02-2012 |
| 20120279479 | Heat Recycling Internal Combustion Enines - This patent describes two engine designs capable of recycling waste heat. The engines are both theoretically capable of approaching 100% efficiency in converting fuel to motion, although they use the same thermodynamic cycle as much lower efficiency 4 stroke engines. | 11-08-2012 |
| 20120285422 | Dual crankshaft, opposed-opposed-piston engine constructions - A dual-crankshaft, opposed-piston, internal combustion engine includes one or more ported cylinders. Each cylinder has exhaust and intake ports, and the cylinders are juxtaposed and oriented with exhaust and intake ports mutually aligned. The crankshafts are rotatably mounted at respective exhaust and intake ends of the cylinders and are coupled by a multi-gear train. A pair of pistons is disposed for opposed sliding movement in the bore of each cylinder. All of the pistons controlling the exhaust ports are coupled by connecting rods to the crankshaft mounted near at the exhaust ends of the cylinders, and all of the pistons controlling the intake ports are coupled by connecting rods to the crankshaft mounted near at the intake ends of the cylinders. The crankshafts are connected by a timing belt operative to change the rotational timing between the crankshafts. The gear train support structure is stiffened to suppress gear train vibration. | 11-15-2012 |
| 20120298077 | OPPOSED PISTON ENGINE WITH GAS EXCHANGE CONTROL BY MEANS OF HYDROSTATICALLY MOVED SLIDING SLEEVES - An opposed piston engine with gas exchange control using sliding sleeves embodied on their outer periphery as differential pistons that can be operated as slave pistons. A plunger that is displaceable by a cam is used as a master piston. A hydraulic liquid is housed between the master piston and the slave piston in a closed pipe system. The liquid column housed between the master piston and the slave piston can be displaced back and forth by hydrostatic pressure build-up enabling the gas exchange elements to be opened and closed by the sliding sleeves. | 11-29-2012 |
| 20130112175 | Constructions for Piston Thermal Management - A piston construction with an end surface is equipped with a pattern of insulating cavities embedded in an upper end of the piston, between the end surface and interior portions of the piston that are cooled by circulating liquid coolant. | 05-09-2013 |
| 20130199503 | Opposed-piston cylinder bore constructions with solid lubrication in the top ring reversal zones - A cylinder for an opposed-piston engine is equipped with a cylinder bore that provides solid lubrication of bore/piston surface interfaces in top ring reversal zones of the cylinder bore. | 08-08-2013 |
| 20130206113 | METHOD AND MEANS FOR CONTROLLING COMBUSTION - A method of charging an internal combustion engine with a fuel air mixture, the engine having opposed pistons with a combustion chamber therebetween, wherein the method includes forcing induction air during a compression stroke between a first and a second cylinder via a contraction and expansion or a venturi disposed between the first and second pistons. | 08-15-2013 |
| 20130276761 | VARIABLE-COMPRESSION ENGINE ASSEMBLY - Variable-compression engine assemblies with an internal combustion device and a flywheel are presented herein. An engine assembly is disclosed which includes an output shaft and a flywheel, which includes a variable cam surface and is slidably mounted onto the output shaft and rotatable about a flywheel axis. Also included is an internal combustion device with a piston that is movable along a central axis in a cycle between refracted and extended positions. The piston engages the variable cam surface, and the central axis of the piston is spaced from the flywheel axis. The cycle includes a power stroke when the piston moves from the retracted position to the extended position whereby the piston presses against the variable cam surface and thereby rotates the flywheel, and a compression stroke when the piston moves from the extended position to the retracted position responsive to the variable cam surface. | 10-24-2013 |
| 20130276762 | Symmetric Opposed-Piston, Opposed-Cylinder Engine - An opposed-piston, opposed-cylinder engine is disclosed that has the pistons symmetrically arranged in the opposed cylinders. In one embodiment, the inner pistons are exhaust pistons and the outer pistons are intake pistons. Alternatively, the inner pistons are intake pistons and the outer pistons are exhaust pistons. The pistons are coupled to the crankshaft that is situated between the opposed cylinders. Central axes of the two cylinders are offset by a predetermined distance. The connecting rods that couple between the crankshaft and the pistons are arranged adjacent to each other on journals of the crankshaft. The journal to which the pushrods couple is not a split-pin type. Instead, it is one that has a common central axis. Furthermore, the crankshaft is a one-piece or unitary structure. | 10-24-2013 |
| 20140026864 | Cylinder and Piston Assemblies for Opposed Piston Engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 01-30-2014 |
| 20140083396 | Combustion Chamber Constructions for Opposed-Piston Engines - An opposed-piston engine includes a ported cylinder and a pair of pistons disposed to reciprocate in the bore of the cylinder. A combustion chamber is defined by opposing shaped piston end surfaces as the pistons approach respective top dead center (TDC) locations in the bore. At the end of scavenging, the shaped end surfaces of the pistons interact with swirl to produce turbulence in the charge air motion in the combustion chamber; the additional bulk motions include tumble. Fuel is injected into the turbulent charge air motion along a major axis, of the combustion chamber. | 03-27-2014 |
| 20140090625 | Piston Thermal Management in an Opposed-Piston Engine - An opposed-piston engine includes pistons, each piston having an annular cavity in the piston's sidewall and positioned between its crown and ring grooves to block transfer of heat from the crown to the piston body. | 04-03-2014 |
| 20140102418 | OPPOSED PISTON ENGINE WITH NON-COLLINEAR AXES OF TRANSLATION - An opposed piston internal combustion engine can include two opposed pistons ( | 04-17-2014 |
| 20140109877 | Integrated Piston and Bridge - A piston coupled to a crankshaft via pullrods presents challenges for coupling the piston to the crankshaft because the connections are provided outside the piston. A bridge is coupled to a piston skirt at the end of the piston away from the piston crown. The bridge structure includes: a central support structure, a first projection extending outwardly from the central support structure in a first radial direction, and a second projection extending outwardly from the central support structure in a second radial direction. The central support structure is substantially hollow with a series of internal braces to yield a lightweight piston. | 04-24-2014 |
| 20140130780 | INTERNAL COMBUSTION ENGINE - The invention relates to an engine ( | 05-15-2014 |
| 20140196693 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder) and a crankshaft disposed at one end of the cylinder. Within each cylinder there is a pair of opposed, reciprocating pistons that form a combustion chamber ( | 07-17-2014 |
| 20140299109 | Dual Crankshaft, Opposed-Piston Engines With Variable Crank Phasing - The timing or phasing of port openings and closings during operation of an opposed-piston engine is varied in response to changing engine speeds and loads by changing crankshaft phasing. | 10-09-2014 |
| 20150013649 | Combustion Chamber Constructions For Opposed-Piston Engines - A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity. | 01-15-2015 |
| 20150027418 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder and a pair of opposed, reciprocating pistons within the cylinder forming a combustion chamber therebetween. The engine has at least one combustion igniter associated with the cylinder, a portion of the combustion igniter being exposed within the combustion chamber formed between the opposed pistons. | 01-29-2015 |
| 20150114358 | Master and Slave Pullrods - Master and slave pullrods are disclosed in which a master pullrod is coupled to a journal of a crankshaft. The slave pullrod indirectly couples to the crankshaft by coupling to the master pullrod. Such a configuration allows two connecting rods to be coupled to the journal of the crankshaft inline with each other. | 04-30-2015 |
| 20150122227 | Combustion Chamber Construction with Dual Mixing Regions for Opposed-Piston Engines - A combustion chamber construction for opposed-piston engines in which fuel is injected from two opposed injectors includes a dual mixing region construction with a respective mixing region for each injector and a coupling region between the two mixing regions through which the mixing regions communicate. In some aspects, the mixing regions are bulbous and are connected by a waist, or tunnel, region that is relatively narrower than the bulbous mixing chambers. | 05-07-2015 |
| 20160047296 | Mechanism For Varying Crankshaft Timing On A Belt/Chain Driven, Dual Crankshaft Opposed-Piston Engine - A mechanism for varying crankshaft timing on a belt/chain driven, dual crankshaft opposed-piston engine includes sprockets on corresponding ends of the two crankshafts, connected by a belt or chain which is tensioned by two or more tensioners. By changing the position of the tensioners the length of the two spans of the belt/chain are varied and thus the phase between the crankshafts is varied. | 02-18-2016 |
| 20160053674 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 02-25-2016 |
| 20160061106 | CRANKSHAFT FOR AN INTERNAL COMBUSTION ENGINE - An internal combustion engine includes a crankshaft having a first web portion defining an inner opening and defining an undercut proximate the inner opening, a second web portion defining an inner opening and defining an undercut proximate the inner opening and an inner bearing portion that engages with the inner opening of the first web portion and with the inner opening of the second web portion. First and second pushrods each have a piston end and a crankshaft end. The crankshaft ends of the first and second pushrods each have a concave surface placed over different portions of the inner bearing portion between the first and second web portions, and each further have shoulders adjacent their respective concave surface that engage with the undercuts of the first and second web portions. | 03-03-2016 |
| 20160146164 | DEVICE FOR ADMITTING INLET GASES AND/OR RECIRCULATED EXHAUST GASES INTO AN INTERNAL COMBUSTION ENGINE CYLINDER - The invention relates to a device for admitting inlet gases and/or recirculated exhaust gases into an internal combustion engine cylinder, the device comprising a duct designed to supply said cylinder with inlet gases and/or with recirculated exhaust gases, characterized in that said device further comprises, in the duct, a flow control means that can be operated between a first position in which said duct supplies the cylinder with the inlet gases and a second position in which said duct supplies the cylinder with the recirculated exhaust gases. It also relates to the intake module and to the engine equipped therewith. | 05-26-2016 |
| 20160252012 | INTERNAL COMBUSTION ENGINES | 09-01-2016 |
| 20160252013 | Piston Crown and Corresponding Port Geometry | 09-01-2016 |
| 20160252044 | Engine Block Construction For Opposed Piston Engine | 09-01-2016 |
| 20160252065 | Opposed Piston Three Nozzle Combustion Chamber Design | 09-01-2016 |
| 20160252066 | Fuel Injector with Offset Nozzle Angle | 09-01-2016 |
| 20160252067 | Opposed Piston Three Nozzle Piston Bowl Design | 09-01-2016 |
| 20100071670 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20120118272 | AXIAL-PISTON ENGINE, METHOD FOR OPERATING AN AXIAL-PISTON ENGINE, AND METHOD FOR PRODUCING A HEAT EXCHANGER OF AN AXIAL-PISTON MOTOR - The aim of the invention is to improve the efficiency of an axial-piston motor. To this end, the axial-piston motor comprises at least one compressor cylinder, at least one working cylinder and at least one pressure line guiding the compressed fuel from the compressor cylinder to the working cylinder. A working piston comprising a working rod is provided in the working cylinder, and a compressor piston comprising a compressor rod is provided in the compressor cylinder. The axial-piston motor is characterized in that it at least one of the two rods comprises transverse stiffeners. | 05-17-2012 |
| 20080223342 | Two-Stroke Engine with Variable Compression - The invention consists of a two-stroke opposing cylinder engine that includes a length flushing system and two crankshafts ( | 09-18-2008 |
| 20080271715 | Internal combustion barrel engine - A two-stroke barrel engine includes a power output shaft configured to rotate, an even number of cylinders encircling the power output shaft, wherein each cylinder includes opposing first and second power pistons configured to reciprocate within their respective power cylinder, and a pair of non-rotating wobbleplates opposed and hingedly connected to the power pistons. The wobbleplates are configured to transfer the reciprocating motion of the power pistons to rotary motion of the power output shaft via a nutating motion of the non-rotating wobbleplate. | 11-06-2008 |
| 20100186723 | TWO-CYCLE, OPPOSED-PISTON INTERNAL COMBUSTION ENGINE - In a two-stroke, opposed-piston internal combustion engine with optimized cooling and no engine block, opposed pistons protrude from the bore during at least a portion of an operating cycle of the engine and are cooled by application of a liquid coolant to their interiors. | 07-29-2010 |
| 20120125298 | Two stroke opposed-piston engines with compression release for engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with a decompression port including a valve and a passage with an opening through the cylinder wall that is located between the cylinder's intake and exhaust ports. The decompression port enables release of compressed air from the cylinder after the intake and exhaust ports are closed. The valve is opened to permit compressed air to be released from the cylinder through the passage, and closed to retain compressed air in the cylinder. Engine braking is supported by release of compressed air through the decompression port into an exhaust channel when the pistons are at or near top dead center positions as the cycle transitions from the intake/compression stroke to the power/exhaust stroke. Compression release from the cylinder after intake and exhaust port closure can also support other engine operations. | 05-24-2012 |
| 20120210985 | Two stroke, opposed-piston engines with engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with an engine brake including an engine braking valve that can be opened to release air from the cylinder as the pistons cycle between BDC and TDC positions. | 08-23-2012 |
| 20140238360 | Rocking Journal Bearings for Two-Stroke Cycle Engines - A rocking journal bearing for a two-stroke cycle engine includes a bearing sleeve having a bearing surface with a plurality of axially-spaced, eccentrically-disposed surface segments and a rocking journal having a plurality of axially-spaced, eccentrically-disposed journal segments. The rocking journal is retained for rocking oscillation on the bearing surface. Space for receiving oil is provided in the rocking journal and oil delivery outlets acting through the journal segments deliver received oil to the bearing surfaces. | 08-28-2014 |
| 20140373814 | Air Handling Control for Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 12-25-2014 |
| 20140373815 | Trapped Burned Gas Fraction Control for Opposed-Piston Engines with Uniflow Scavenging - A trapped burned gas fraction is controlled in a two-stroke cycle opposed-piston engine with uniflow scavenging by adjusting an external EGR setpoint in real time. The adjusted setpoint is used to control EGR flow in the engine's air handling system. | 12-25-2014 |
| 20140373816 | System and Method for Air Handling Control in Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, repeatable trapped mass and composition are achieved by determining provision of air handling setpoints that control operation of the engine's air handling system components. In some aspects, these setpoints govern operations of the air handling system by actively controlling the intake manifold pressure (IMP), EGR flow, and exhaust channel backpressure. | 12-25-2014 |
| 20160025002 | IMPROVED OPPOSED PISTON ENGINE - The invention relates to an opposed piston engine comprising at least one cylinder, at least two pistons arranged to be reciprocated within the same cylinder in an opposed manner, at least one intake port through the cylinder wall, at least one exhaust port through the cylinder wall, at least one shaft arranged to be rotated by reciprocal motion of the opposed pistons, at least one reciprocatable sleeve valve within the cylinder for controlling porting of one or both of the at least one intake port and the at least one exhaust port, a sleeve valve driving mechanism for controlling reciprocal motion of the at least one sleeve valve, and a dwell mechanism. The dwell mechanism is configured to induce at least one period of dwell of the at least two pistons during their respective cycles of piston motion. | 01-28-2016 |
| 20160032822 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis, a first inlet port, and a first exhaust port. First pistons are slidably disposed within the first cylinder and are movable toward one another and away from one another. The engine additionally includes a second cylinder having a second longitudinal axis, a second inlet port, and a second exhaust port. The second cylinder is disposed adjacent to the first cylinder with the second inlet port being aligned with the first exhaust port in a first direction extending substantially perpendicular to the first longitudinal axis and the second longitudinal axis, and the second exhaust port being aligned with the first inlet port in the first direction. Second pistons are slidably disposed within the second cylinder and are movable toward one and away from one another. | 02-04-2016 |
| 20160032823 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis and a first pair of pistons slidably disposed within the first cylinder and movable toward one another in a first mode of operation and away from one another in a second mode of operation. The engine additionally includes a second cylinder having a second longitudinal axis and a second pair of pistons slidably disposed within the second cylinder and movable toward one another in the first mode of operation and away from one another in the second mode of operation. A crankshaft is connected to at least one of the first pair of pistons and at least one of the second pair of pistons and has an axis of rotation. The axis of rotation is disposed between and is substantially perpendicular to the first longitudinal axis and the second longitudinal axis. | 02-04-2016 |
| 20160069293 | OPPOSED PISTON TWO-STROKE ENGINE WITH THERMAL BARRIER - In one configuration, the present disclosure provides a cylinder including a first housing, a second housing, and an insert. The first housing includes a first body portion and a first collar portion. The first body portion has a first inner diameter, and the first collar portion has a second inner diameter that is greater than the first inner diameter. The second housing includes a second body portion and a second collar portion. The second body portion has a third inner diameter and the second collar portion has a fourth inner diameter that is greater than the third inner diameter. The second housing is coupled to the first housing such that the first and second collared portions cooperate to form an annular channel. The insert is disposed within the annular channel formed by the first and second collared portions. | 03-10-2016 |
| 20160076468 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 03-17-2016 |
| 20160252004 | HYBRID OPPOSED-PISTON ENGINE SYSTEM | 09-01-2016 |
| 20100282219 | MONOBLOCK VALVELESS OPPOSING PISTON INTERNAL COMBUSTION ENGINE - The present invention provides an internal combustion engine that provides advantages of both typical 2-stroke engines and typical 4-stroke engines, but using a new design unlike either. The present engine provides for use of pistons as means for opening and closing intake and exhaust ports disposed on cylinder walls. It also provides two pistons per cylinder in an opposing configuration, such that one fuel explosion event causes motion of both pistons per cylinder, in opposite directions. Each piston of a cylinder is connected to a separate crankshaft, which completes a single revolution about its axis per fuel explosion event in a cylinder. In a single cycle of piston movement along the cylinder, a full cycle of ignition, exhaust, intake, and compression is achieved. | 11-11-2010 |
| 20130239930 | DUAL CRANKSHAFT ENGINE - A dual-crankshaft engine is presented. In one embodiment, the engine includes a first crankshaft and a second crankshaft. The second crankshaft is coupled with the first crankshaft such that the first crankshaft and the second crankshaft are horizontally coplanar. The engine further includes a first piston that is operable to reciprocate in a first horizontal cylinder via coupling with the first crankshaft, and a second piston that is operable to reciprocate in a second horizontal cylinder via coupling with the second crankshaft. The second horizontal cylinder is horizontally collinear with and opposing the first horizontal cylinder. | 09-19-2013 |
| 20140261338 | In-Line Six Internal Combustion Engine - One non-limiting object of the present invention is to provide modifications to conventional in line 6 cylinder engines capable of increasing their efficiency in operation. This includes modifying the central two adjacent piston and cylinder assemblies of the engines. The modifications involve (1) changing the camshaft so that the central two adjacent piston and cylinder assemblies have their four stroke cycles in phase rather than 180° out of phase, (2) providing a communicating passage between the combustion chambers of the central two piston and cylinder assemblies and (3) modifying either the hardware or programming for the control of the fuel injectors of the central two piston and cylinder assemblies so that they can be selectively controlled not to inject fuel during the operation cycle thereof. The modifications contemplates providing a new cam shaft in which not only the cams relating to the central two adjacent piston and cylinder assemblies are modified to change 180° out of phase to in phase, but the cams relating to other piston and cylinder assemblies in order to provide a somewhat balanced application of the driving forces during each cycle. | 09-18-2014 |
| 20130220281 | METHOD, ENGINE CYLINDER, AND ENGINE WITH OPPOSED SEMI-LOOP SCAVENGING - A method for the reverse scavenging of an engine cylinder and for the introduction of fresh gas into the cylinder and for the discharge of exhaust gas out of the cylinder. The cylinder has oppositely disposed and opposingly driven pistons. In the region of the respective bottom dead center (BDC) of the two pistons, there are formed in the cylinder wall in each case one outlet region for the exhaust gas and in each case one, in particular circumferentially opposite flow transfer region for pre-compressed fresh gas which has been admitted from the crankcase. The fresh gas supplied through the respective flow transfer region is expelled in the direction of the wall region which is situated on that side of the cylinder inner wall and which adjoins the flow transfer region in the cylinder longitudinal direction. | 08-29-2013 |
| 20090165754 | Two-stroke Opposed Cylinder Internal Combustion Engine with Integrated Positive Displacement Supercharger and Regenerator. - A two-stroke internal combustion engine ( | 07-02-2009 |
| 20100192923 | INTERNAL COMBUSTION ENGINES - The invention provides a 2-stroke internal combustion engine comprising two opposed cylinders, each cylinder housing two opposed pistons and having at least one exhaust port and at least one intake port, and a crankshaft having asymmetrically arranged journals and scotch-yoke mechanisms for driving the journals from the pistons. The pistons in each cylinder operate to open its exhaust port or ports before its intake port or ports and to close its exhaust port or ports before its intake port or ports. | 08-05-2010 |
| 20120204841 | Opposed-Piston, Opposed-Cylinder Engine With Collinear Cylinders - An opposed-piston, opposed-cylinder OPOC engine is disclosed in which the central axis of the two cylinders is collinear. In four-stroke engines, this is possible with a built up crankshaft. Disclosed are connecting rod configurations that are suitable for a two-stroke engine that can be assembled to a unitary crankshaft, including both pullrods in tension and pushrods in compression. The configuration includes pistons arranged symmetrically, but with offset timing of the intake and exhaust pistons. The offset timing leads to a slight imbalance which can partially overcome by having the center of gravity of the crankshaft offset from the axis of rotation. | 08-16-2012 |
| 20130133627 | RECIPROCATING PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 05-30-2013 |
| 20160090900 | Multi-Cylinder Opposed Stepped Piston Engine - With reference to FIG. | 03-31-2016 |
| 123051000 | Two-cycle | 21 |
| 20080210204 | Internal combustion engine - A piston of an internal combustion engine includes a cavity for gases passing a piston ring and a first flow path leading from the cavity to a piston ring region and a second flow path extending from the cavity to an outlet opening for removing gases to an inlet opening in a cylinder wall in at least one piston position. | 09-04-2008 |
| 20080245345 | Oscillating Piston Engine - An oscillating piston engine comprises an internal combustion engine part having a housing part in which there are arranged a first and at least a second piston which can jointly revolve in the housing part about an axis of rotation fixed in relation to the housing and which, when revolving about the axis of rotation, perform reciprocating oscillating movements in opposition to one another about an axis of oscillation extending perpendicularly to the axis of rotation. The first piston has a first end face and the at least second piston has a second end face facing the first end face, the end faces delimiting a working chamber in the direction of oscillation of the pistons. The internal combustion engine part is adjoined in the direction of the axis of rotation by an electromotive part having at least one rotor which is arranged concentrically with the axis of rotation and which is arranged in a housing part adjoining the housing part of the internal combustion engine part. | 10-09-2008 |
| 20090090334 | Opposed piston electromagnetic engine - An engine includes a cylinder having a two pistons slidably disposed therein, a port arranged to admit a reactant into the cylinder between the two pistons, and a converter operable with at least one piston to convert mechanical energy of the piston to electrical energy. | 04-09-2009 |
| 20100071671 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20100147269 | Internal Combustion Engine With Optimal Bore-To-Stroke Ratio - An internal combustion engine. The engine includes at least one cylinder having a bore diameter, a piston for traveling within each cylinder between a first position and a second position, wherein the distance between the first position and the second position defines a stroke length, and thermal barriers on the surfaces of the combustion chamber near top dead center. In one embodiment, the engine utilizes asymmetric effective compression and expansion strokes. To maximize efficiency of the engine, a ratio of the bore diameter to stroke length of the internal combustion engine comprises a range between 0.5 to 1.0. | 06-17-2010 |
| 20100212637 | Cylinder and piston assemblies for opposed piston engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 08-26-2010 |
| 20100212638 | Opposed piston engines with controlled provision of lubricant for lubrication and cooling - In multi-cylinder opposed engine constructions provision of lubricant for lubricating bearings, for cooling cylinders, and for cooling pistons includes pumping an inlet stream of lubricant through a gallery in the engine that is in fluid communication with bearing lubricant passages and cylinder coolant passages and providing lubricant from the inlet stream of lubricant into at least one piston coolant manifold in response to a first engine operating condition. | 08-26-2010 |
| 20100229836 | GUIDED BRIDGE FOR A PISTON IN AN INTERNAL COMBUSTION ENGINE - An improved configuration for internal combustion engine that reduces side forces on pistons during the engine cycle. The improvement is an intermediate and guided bridge element located between pull rods and pistons with articulated connections that allow side forces to be dissipated away from the pistons. | 09-16-2010 |
| 20100319661 | Cylinder-Mounted oil wiper for an opposed piston engine - A ported cylinder for a diesel engine includes a circular groove in the bore, located on the outside of respective port. An oil wiper ring or a group of oil wiper rings is seated in the circular groove for wiping excess lubricating oil from a piston surface. A compressing ring is disposed between the oil wiper ring or group of oil wiper rings and the floor of the circular groove to urge the oil wiper rings into contact with the piston surface. An oil wiper ring construction includes a major surface with oil-conducting channels. | 12-23-2010 |
| 20110083644 | Engine Having Opposed Pistons and Opposed Cylinders and Side Dual Power Output Shafts - An engine having axial inline pistons connected to side power output shafts is disclosed. The engine includes a cylinder defining an interior space of the cylinder; a first piston that reciprocates in the interior space of the cylinder wherein the first piston has a first end forming a first piston head; a first piston rod attached to the first piston at a second end of the first piston opposite the first end of the first piston; a second piston that reciprocates in the interior space of the cylinder, wherein the second piston has a first end forming a second piston head; a second piston rod attached to the second piston at a second end of the second piston opposite the first end of the second piston; a first connecting rod connected to the first piston rod and coupled to a first power output shaft; and a second connecting rod connected to the second piston rod and coupled to the first power output shaft. The first piston head and the second piston head define a combustion chamber in the cylinder between the first piston head and the second piston head, and the first piston head and the second piston head move away from each other on a first power stroke of the first piston and a second power stroke of the second piston. | 04-14-2011 |
| 20110100334 | FUEL INJECTION SYSTEM - An engine includes a first piston with surfaces that define a substantially cylindrical chamber inside the first piston and a passage into the substantially cylindrical chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical chamber and to define, in cooperation with the substantially cylindrical chamber, a combustion chamber. A fuel injector extends at least partially through the passage in the first piston to inject fuel into the combustion chamber. The first piston is arranged to move in a reciprocating manner relative to the fuel injector. | 05-05-2011 |
| 20110132333 | INTERNAL COMBUSTION ENGINE WITH WORKING, PISTON AND CONTROL PISTON - The invention relates to an internal combustion engine comprising two opposed pistons sharing the same cylinder (FIG. | 06-09-2011 |
| 20110146629 | INTERNAL PRESSURE DRIVEN ENGINE - An internal combustion engine or other internal pressure driven engine of the type capable of converting reciprocal linear powered motion into unidirectional rotary motion, the engine having at least one pair of first and second cylinders with each cylinder having a pair of opposed pistons therein forming a pressure chamber therebetween. Outer ends of each piston carries a piston rod connected to a pivot arm of a respective one way clutch which causes the clutch to oscillate back and forth when the piston moves in and out due to pressure or combustion in the pressure chamber. Alternatively, the piston rods may be configured as gear racks in direct operative engagement with pinion gears of the one way clutches. The clutches are parallel and spaced apart from each other near each end of the cylinders. Each clutch carries a gear on one end which intermeshes with a gear rack assembly having gears and a gear rack which drives a crankshaft and auxiliary flywheel operatively connected to a starter. Once the starter is turned on the kinetic energy of the flywheel and gear rack keeps the on/off clutches in continuous oscillation. The oscillating clutches turn unidirectional drive shafts connected through pinion gears to a main output shaft and main flywheel. | 06-23-2011 |
| 20110186017 | Single-crankshaft, opposed-piston engine constructions - Ported engines with opposed pistons are coupled to a single crankshaft through rocker arm linkages. Each pair of opposed pistons is coupled to a single crankpin of the crankshaft. Each piston is coupled to a respective rocker arm linkage by a rolling thrust bearing which prevents linkage movement that is transverse to the axis of the piston from being transferred to the piston. Each piston of a pair of opposed pistons is coupled to the same crankpin by respective rocker arm linkages in which connecting rods run between the crankpin and respective rocker arms. One connecting rod is connected to first rocker arm below the rocker arm's pivot point and another connecting rod is connected to a second rocker arm above the rocker arm's pivot point. | 08-04-2011 |
| 20110259304 | FUEL INJECTION SYSTEM - An engine includes a fuel injector support element to support a fuel injector and define a first opening through which the fuel injector can inject fuel. A first piston defines a substantially cylindrical inner chamber and a portal into the substantially cylindrical inner chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical inner chamber and to define, in cooperation with the substantially cylindrical inner chamber, a combustion chamber. The first fuel injector support element and the first piston are arranged such that, during engine operation, the first piston reciprocates relative to the first fuel injector support element to thereby cause the first opening and the first portal to move in and out of alignment with one another. | 10-27-2011 |
| 20120031379 | Horizontally Opposed Center Fired Engine - The horizontally opposed center fired engine improves on the traditional design of the horizontally opposed engines and center fired engines with a better engine geometry. The present invention utilizes four pairs of opposing pistons to compress a larger volume of air-fuel mixture within four different cylinders. The four different cylinders are radially positioned around a center axle in order to achieve a perfectly symmetric engine geometry. The center axle consists of two different shafts spinning in two different directions, which could drastically reduce engine vibrations in the present invention. Engine vibrations are caused by a change in engine speed and result in a loss of energy. Due to the design, the present invention will only experience energy loss in the form of entropy and friction. Thus, the present invention can convert a higher percentage of chemical energy into mechanical energy than any other internal combustion engine. | 02-09-2012 |
| 20120037129 | OPPOSED PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 02-16-2012 |
| 20120037130 | Opposed-piston engine having a single crankshaft coupled to the opposed pistons by linkages with pivoted rocker arms - An opposed-piston engine with a single crankshaft has a rocker-type linkage coupling the crankshaft to the pistons that utilizes a rotatable pivot rocker arm with full-contact plain bearings. A rocker-type linkage utilizes a rotatable pivot bearing with an eccentric aspect to vary translation of piston linkage along the axial direction of a cylinder, which shifts the top dead center (TDC) and bottom dead center (BDC) locations of a piston so as to change the volume of charge air compressed during the power stroke. | 02-16-2012 |
| 20120055451 | Inwardly Opposed Pistons, Fixed Position Common Cylinder Engine with External Induction - An engine with a design for an inwardly opposed-piston, 4 cycle engine with a common, fixed cylinder and external induction system. The present invention features include a fixed, common cylinder in which 2 pistons move towards each other during the cycling of the engine, external, modular, fix mounted induction and exhaust system, multiple power take off shafts as well as additional cylinder/piston bank modularity. The production of such design provides for increased thermal, mechanical and volumetric efficiency as it relates to similar internal combustion engines. | 03-08-2012 |
| 20120186561 | Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston engines - An opposed piston engine includes at least one cylinder with a bore surface and longitudinally-spaced exhaust and intake ports that open through the sidewall of the cylinder. A pair of opposed pistons is disposed in the cylinder for sliding movement along the bore surface. An oil-retaining surface texture pattern in an interface between the pistons and the bore surface extends in a longitudinal direction of the cylinder, aligned with bridges of at least one port. The surface texture pattern includes a plurality of separate recesses on an outside surface of a skirt of each piston. Alternatively, or in addition, the surface texture pattern includes a plurality of separate recesses extending in a longitudinal direction of the cylinder, aligned with bridges of at least one port. | 07-26-2012 |
| 20120192838 | BALANCED FIVE STROKE, FIVE CYLINDER BARREL CAM TYPE INTERNAL COMBUSTION ENGINE - A balanced five-stroke cycle, five cylinder engine, wherein the five cylinders are parallel and arranged around a shaft mounted in a centrally disposed bore in the engine block, wherein the shaft is parallel to the cylinders, wherein power pistons in the cylinders dwell motionless for the intake part of the cycle between the vacuum stroke and the compression stroke of each power piston; induction of the combustion mixture resulting from the partial vacuum created by the vacuum stroke of the power piston, and wherein the position of each power piston is governed by a power piston cam mounted on the shaft, the shaft and bore on the centroidal axis of symmetry of the radially spaced apart array of five cylinders corresponding to the pistons, the opening and closing of exhaust ports governed by an exhaust piston cam mounted on the shaft moving exhaust pistons along the cylinders. | 08-02-2012 |
| 20120279479 | Heat Recycling Internal Combustion Enines - This patent describes two engine designs capable of recycling waste heat. The engines are both theoretically capable of approaching 100% efficiency in converting fuel to motion, although they use the same thermodynamic cycle as much lower efficiency 4 stroke engines. | 11-08-2012 |
| 20120285422 | Dual crankshaft, opposed-opposed-piston engine constructions - A dual-crankshaft, opposed-piston, internal combustion engine includes one or more ported cylinders. Each cylinder has exhaust and intake ports, and the cylinders are juxtaposed and oriented with exhaust and intake ports mutually aligned. The crankshafts are rotatably mounted at respective exhaust and intake ends of the cylinders and are coupled by a multi-gear train. A pair of pistons is disposed for opposed sliding movement in the bore of each cylinder. All of the pistons controlling the exhaust ports are coupled by connecting rods to the crankshaft mounted near at the exhaust ends of the cylinders, and all of the pistons controlling the intake ports are coupled by connecting rods to the crankshaft mounted near at the intake ends of the cylinders. The crankshafts are connected by a timing belt operative to change the rotational timing between the crankshafts. The gear train support structure is stiffened to suppress gear train vibration. | 11-15-2012 |
| 20120298077 | OPPOSED PISTON ENGINE WITH GAS EXCHANGE CONTROL BY MEANS OF HYDROSTATICALLY MOVED SLIDING SLEEVES - An opposed piston engine with gas exchange control using sliding sleeves embodied on their outer periphery as differential pistons that can be operated as slave pistons. A plunger that is displaceable by a cam is used as a master piston. A hydraulic liquid is housed between the master piston and the slave piston in a closed pipe system. The liquid column housed between the master piston and the slave piston can be displaced back and forth by hydrostatic pressure build-up enabling the gas exchange elements to be opened and closed by the sliding sleeves. | 11-29-2012 |
| 20130112175 | Constructions for Piston Thermal Management - A piston construction with an end surface is equipped with a pattern of insulating cavities embedded in an upper end of the piston, between the end surface and interior portions of the piston that are cooled by circulating liquid coolant. | 05-09-2013 |
| 20130199503 | Opposed-piston cylinder bore constructions with solid lubrication in the top ring reversal zones - A cylinder for an opposed-piston engine is equipped with a cylinder bore that provides solid lubrication of bore/piston surface interfaces in top ring reversal zones of the cylinder bore. | 08-08-2013 |
| 20130206113 | METHOD AND MEANS FOR CONTROLLING COMBUSTION - A method of charging an internal combustion engine with a fuel air mixture, the engine having opposed pistons with a combustion chamber therebetween, wherein the method includes forcing induction air during a compression stroke between a first and a second cylinder via a contraction and expansion or a venturi disposed between the first and second pistons. | 08-15-2013 |
| 20130276761 | VARIABLE-COMPRESSION ENGINE ASSEMBLY - Variable-compression engine assemblies with an internal combustion device and a flywheel are presented herein. An engine assembly is disclosed which includes an output shaft and a flywheel, which includes a variable cam surface and is slidably mounted onto the output shaft and rotatable about a flywheel axis. Also included is an internal combustion device with a piston that is movable along a central axis in a cycle between refracted and extended positions. The piston engages the variable cam surface, and the central axis of the piston is spaced from the flywheel axis. The cycle includes a power stroke when the piston moves from the retracted position to the extended position whereby the piston presses against the variable cam surface and thereby rotates the flywheel, and a compression stroke when the piston moves from the extended position to the retracted position responsive to the variable cam surface. | 10-24-2013 |
| 20130276762 | Symmetric Opposed-Piston, Opposed-Cylinder Engine - An opposed-piston, opposed-cylinder engine is disclosed that has the pistons symmetrically arranged in the opposed cylinders. In one embodiment, the inner pistons are exhaust pistons and the outer pistons are intake pistons. Alternatively, the inner pistons are intake pistons and the outer pistons are exhaust pistons. The pistons are coupled to the crankshaft that is situated between the opposed cylinders. Central axes of the two cylinders are offset by a predetermined distance. The connecting rods that couple between the crankshaft and the pistons are arranged adjacent to each other on journals of the crankshaft. The journal to which the pushrods couple is not a split-pin type. Instead, it is one that has a common central axis. Furthermore, the crankshaft is a one-piece or unitary structure. | 10-24-2013 |
| 20140026864 | Cylinder and Piston Assemblies for Opposed Piston Engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 01-30-2014 |
| 20140083396 | Combustion Chamber Constructions for Opposed-Piston Engines - An opposed-piston engine includes a ported cylinder and a pair of pistons disposed to reciprocate in the bore of the cylinder. A combustion chamber is defined by opposing shaped piston end surfaces as the pistons approach respective top dead center (TDC) locations in the bore. At the end of scavenging, the shaped end surfaces of the pistons interact with swirl to produce turbulence in the charge air motion in the combustion chamber; the additional bulk motions include tumble. Fuel is injected into the turbulent charge air motion along a major axis, of the combustion chamber. | 03-27-2014 |
| 20140090625 | Piston Thermal Management in an Opposed-Piston Engine - An opposed-piston engine includes pistons, each piston having an annular cavity in the piston's sidewall and positioned between its crown and ring grooves to block transfer of heat from the crown to the piston body. | 04-03-2014 |
| 20140102418 | OPPOSED PISTON ENGINE WITH NON-COLLINEAR AXES OF TRANSLATION - An opposed piston internal combustion engine can include two opposed pistons ( | 04-17-2014 |
| 20140109877 | Integrated Piston and Bridge - A piston coupled to a crankshaft via pullrods presents challenges for coupling the piston to the crankshaft because the connections are provided outside the piston. A bridge is coupled to a piston skirt at the end of the piston away from the piston crown. The bridge structure includes: a central support structure, a first projection extending outwardly from the central support structure in a first radial direction, and a second projection extending outwardly from the central support structure in a second radial direction. The central support structure is substantially hollow with a series of internal braces to yield a lightweight piston. | 04-24-2014 |
| 20140130780 | INTERNAL COMBUSTION ENGINE - The invention relates to an engine ( | 05-15-2014 |
| 20140196693 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder) and a crankshaft disposed at one end of the cylinder. Within each cylinder there is a pair of opposed, reciprocating pistons that form a combustion chamber ( | 07-17-2014 |
| 20140299109 | Dual Crankshaft, Opposed-Piston Engines With Variable Crank Phasing - The timing or phasing of port openings and closings during operation of an opposed-piston engine is varied in response to changing engine speeds and loads by changing crankshaft phasing. | 10-09-2014 |
| 20150013649 | Combustion Chamber Constructions For Opposed-Piston Engines - A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity. | 01-15-2015 |
| 20150027418 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder and a pair of opposed, reciprocating pistons within the cylinder forming a combustion chamber therebetween. The engine has at least one combustion igniter associated with the cylinder, a portion of the combustion igniter being exposed within the combustion chamber formed between the opposed pistons. | 01-29-2015 |
| 20150114358 | Master and Slave Pullrods - Master and slave pullrods are disclosed in which a master pullrod is coupled to a journal of a crankshaft. The slave pullrod indirectly couples to the crankshaft by coupling to the master pullrod. Such a configuration allows two connecting rods to be coupled to the journal of the crankshaft inline with each other. | 04-30-2015 |
| 20150122227 | Combustion Chamber Construction with Dual Mixing Regions for Opposed-Piston Engines - A combustion chamber construction for opposed-piston engines in which fuel is injected from two opposed injectors includes a dual mixing region construction with a respective mixing region for each injector and a coupling region between the two mixing regions through which the mixing regions communicate. In some aspects, the mixing regions are bulbous and are connected by a waist, or tunnel, region that is relatively narrower than the bulbous mixing chambers. | 05-07-2015 |
| 20160047296 | Mechanism For Varying Crankshaft Timing On A Belt/Chain Driven, Dual Crankshaft Opposed-Piston Engine - A mechanism for varying crankshaft timing on a belt/chain driven, dual crankshaft opposed-piston engine includes sprockets on corresponding ends of the two crankshafts, connected by a belt or chain which is tensioned by two or more tensioners. By changing the position of the tensioners the length of the two spans of the belt/chain are varied and thus the phase between the crankshafts is varied. | 02-18-2016 |
| 20160053674 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 02-25-2016 |
| 20160061106 | CRANKSHAFT FOR AN INTERNAL COMBUSTION ENGINE - An internal combustion engine includes a crankshaft having a first web portion defining an inner opening and defining an undercut proximate the inner opening, a second web portion defining an inner opening and defining an undercut proximate the inner opening and an inner bearing portion that engages with the inner opening of the first web portion and with the inner opening of the second web portion. First and second pushrods each have a piston end and a crankshaft end. The crankshaft ends of the first and second pushrods each have a concave surface placed over different portions of the inner bearing portion between the first and second web portions, and each further have shoulders adjacent their respective concave surface that engage with the undercuts of the first and second web portions. | 03-03-2016 |
| 20160146164 | DEVICE FOR ADMITTING INLET GASES AND/OR RECIRCULATED EXHAUST GASES INTO AN INTERNAL COMBUSTION ENGINE CYLINDER - The invention relates to a device for admitting inlet gases and/or recirculated exhaust gases into an internal combustion engine cylinder, the device comprising a duct designed to supply said cylinder with inlet gases and/or with recirculated exhaust gases, characterized in that said device further comprises, in the duct, a flow control means that can be operated between a first position in which said duct supplies the cylinder with the inlet gases and a second position in which said duct supplies the cylinder with the recirculated exhaust gases. It also relates to the intake module and to the engine equipped therewith. | 05-26-2016 |
| 20160252012 | INTERNAL COMBUSTION ENGINES | 09-01-2016 |
| 20160252013 | Piston Crown and Corresponding Port Geometry | 09-01-2016 |
| 20160252044 | Engine Block Construction For Opposed Piston Engine | 09-01-2016 |
| 20160252065 | Opposed Piston Three Nozzle Combustion Chamber Design | 09-01-2016 |
| 20160252066 | Fuel Injector with Offset Nozzle Angle | 09-01-2016 |
| 20160252067 | Opposed Piston Three Nozzle Piston Bowl Design | 09-01-2016 |
| 20100071670 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20120118272 | AXIAL-PISTON ENGINE, METHOD FOR OPERATING AN AXIAL-PISTON ENGINE, AND METHOD FOR PRODUCING A HEAT EXCHANGER OF AN AXIAL-PISTON MOTOR - The aim of the invention is to improve the efficiency of an axial-piston motor. To this end, the axial-piston motor comprises at least one compressor cylinder, at least one working cylinder and at least one pressure line guiding the compressed fuel from the compressor cylinder to the working cylinder. A working piston comprising a working rod is provided in the working cylinder, and a compressor piston comprising a compressor rod is provided in the compressor cylinder. The axial-piston motor is characterized in that it at least one of the two rods comprises transverse stiffeners. | 05-17-2012 |
| 20080223342 | Two-Stroke Engine with Variable Compression - The invention consists of a two-stroke opposing cylinder engine that includes a length flushing system and two crankshafts ( | 09-18-2008 |
| 20080271715 | Internal combustion barrel engine - A two-stroke barrel engine includes a power output shaft configured to rotate, an even number of cylinders encircling the power output shaft, wherein each cylinder includes opposing first and second power pistons configured to reciprocate within their respective power cylinder, and a pair of non-rotating wobbleplates opposed and hingedly connected to the power pistons. The wobbleplates are configured to transfer the reciprocating motion of the power pistons to rotary motion of the power output shaft via a nutating motion of the non-rotating wobbleplate. | 11-06-2008 |
| 20100186723 | TWO-CYCLE, OPPOSED-PISTON INTERNAL COMBUSTION ENGINE - In a two-stroke, opposed-piston internal combustion engine with optimized cooling and no engine block, opposed pistons protrude from the bore during at least a portion of an operating cycle of the engine and are cooled by application of a liquid coolant to their interiors. | 07-29-2010 |
| 20120125298 | Two stroke opposed-piston engines with compression release for engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with a decompression port including a valve and a passage with an opening through the cylinder wall that is located between the cylinder's intake and exhaust ports. The decompression port enables release of compressed air from the cylinder after the intake and exhaust ports are closed. The valve is opened to permit compressed air to be released from the cylinder through the passage, and closed to retain compressed air in the cylinder. Engine braking is supported by release of compressed air through the decompression port into an exhaust channel when the pistons are at or near top dead center positions as the cycle transitions from the intake/compression stroke to the power/exhaust stroke. Compression release from the cylinder after intake and exhaust port closure can also support other engine operations. | 05-24-2012 |
| 20120210985 | Two stroke, opposed-piston engines with engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with an engine brake including an engine braking valve that can be opened to release air from the cylinder as the pistons cycle between BDC and TDC positions. | 08-23-2012 |
| 20140238360 | Rocking Journal Bearings for Two-Stroke Cycle Engines - A rocking journal bearing for a two-stroke cycle engine includes a bearing sleeve having a bearing surface with a plurality of axially-spaced, eccentrically-disposed surface segments and a rocking journal having a plurality of axially-spaced, eccentrically-disposed journal segments. The rocking journal is retained for rocking oscillation on the bearing surface. Space for receiving oil is provided in the rocking journal and oil delivery outlets acting through the journal segments deliver received oil to the bearing surfaces. | 08-28-2014 |
| 20140373814 | Air Handling Control for Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 12-25-2014 |
| 20140373815 | Trapped Burned Gas Fraction Control for Opposed-Piston Engines with Uniflow Scavenging - A trapped burned gas fraction is controlled in a two-stroke cycle opposed-piston engine with uniflow scavenging by adjusting an external EGR setpoint in real time. The adjusted setpoint is used to control EGR flow in the engine's air handling system. | 12-25-2014 |
| 20140373816 | System and Method for Air Handling Control in Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, repeatable trapped mass and composition are achieved by determining provision of air handling setpoints that control operation of the engine's air handling system components. In some aspects, these setpoints govern operations of the air handling system by actively controlling the intake manifold pressure (IMP), EGR flow, and exhaust channel backpressure. | 12-25-2014 |
| 20160025002 | IMPROVED OPPOSED PISTON ENGINE - The invention relates to an opposed piston engine comprising at least one cylinder, at least two pistons arranged to be reciprocated within the same cylinder in an opposed manner, at least one intake port through the cylinder wall, at least one exhaust port through the cylinder wall, at least one shaft arranged to be rotated by reciprocal motion of the opposed pistons, at least one reciprocatable sleeve valve within the cylinder for controlling porting of one or both of the at least one intake port and the at least one exhaust port, a sleeve valve driving mechanism for controlling reciprocal motion of the at least one sleeve valve, and a dwell mechanism. The dwell mechanism is configured to induce at least one period of dwell of the at least two pistons during their respective cycles of piston motion. | 01-28-2016 |
| 20160032822 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis, a first inlet port, and a first exhaust port. First pistons are slidably disposed within the first cylinder and are movable toward one another and away from one another. The engine additionally includes a second cylinder having a second longitudinal axis, a second inlet port, and a second exhaust port. The second cylinder is disposed adjacent to the first cylinder with the second inlet port being aligned with the first exhaust port in a first direction extending substantially perpendicular to the first longitudinal axis and the second longitudinal axis, and the second exhaust port being aligned with the first inlet port in the first direction. Second pistons are slidably disposed within the second cylinder and are movable toward one and away from one another. | 02-04-2016 |
| 20160032823 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis and a first pair of pistons slidably disposed within the first cylinder and movable toward one another in a first mode of operation and away from one another in a second mode of operation. The engine additionally includes a second cylinder having a second longitudinal axis and a second pair of pistons slidably disposed within the second cylinder and movable toward one another in the first mode of operation and away from one another in the second mode of operation. A crankshaft is connected to at least one of the first pair of pistons and at least one of the second pair of pistons and has an axis of rotation. The axis of rotation is disposed between and is substantially perpendicular to the first longitudinal axis and the second longitudinal axis. | 02-04-2016 |
| 20160069293 | OPPOSED PISTON TWO-STROKE ENGINE WITH THERMAL BARRIER - In one configuration, the present disclosure provides a cylinder including a first housing, a second housing, and an insert. The first housing includes a first body portion and a first collar portion. The first body portion has a first inner diameter, and the first collar portion has a second inner diameter that is greater than the first inner diameter. The second housing includes a second body portion and a second collar portion. The second body portion has a third inner diameter and the second collar portion has a fourth inner diameter that is greater than the third inner diameter. The second housing is coupled to the first housing such that the first and second collared portions cooperate to form an annular channel. The insert is disposed within the annular channel formed by the first and second collared portions. | 03-10-2016 |
| 20160076468 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 03-17-2016 |
| 20160252004 | HYBRID OPPOSED-PISTON ENGINE SYSTEM | 09-01-2016 |
| 20100282219 | MONOBLOCK VALVELESS OPPOSING PISTON INTERNAL COMBUSTION ENGINE - The present invention provides an internal combustion engine that provides advantages of both typical 2-stroke engines and typical 4-stroke engines, but using a new design unlike either. The present engine provides for use of pistons as means for opening and closing intake and exhaust ports disposed on cylinder walls. It also provides two pistons per cylinder in an opposing configuration, such that one fuel explosion event causes motion of both pistons per cylinder, in opposite directions. Each piston of a cylinder is connected to a separate crankshaft, which completes a single revolution about its axis per fuel explosion event in a cylinder. In a single cycle of piston movement along the cylinder, a full cycle of ignition, exhaust, intake, and compression is achieved. | 11-11-2010 |
| 20130239930 | DUAL CRANKSHAFT ENGINE - A dual-crankshaft engine is presented. In one embodiment, the engine includes a first crankshaft and a second crankshaft. The second crankshaft is coupled with the first crankshaft such that the first crankshaft and the second crankshaft are horizontally coplanar. The engine further includes a first piston that is operable to reciprocate in a first horizontal cylinder via coupling with the first crankshaft, and a second piston that is operable to reciprocate in a second horizontal cylinder via coupling with the second crankshaft. The second horizontal cylinder is horizontally collinear with and opposing the first horizontal cylinder. | 09-19-2013 |
| 20140261338 | In-Line Six Internal Combustion Engine - One non-limiting object of the present invention is to provide modifications to conventional in line 6 cylinder engines capable of increasing their efficiency in operation. This includes modifying the central two adjacent piston and cylinder assemblies of the engines. The modifications involve (1) changing the camshaft so that the central two adjacent piston and cylinder assemblies have their four stroke cycles in phase rather than 180° out of phase, (2) providing a communicating passage between the combustion chambers of the central two piston and cylinder assemblies and (3) modifying either the hardware or programming for the control of the fuel injectors of the central two piston and cylinder assemblies so that they can be selectively controlled not to inject fuel during the operation cycle thereof. The modifications contemplates providing a new cam shaft in which not only the cams relating to the central two adjacent piston and cylinder assemblies are modified to change 180° out of phase to in phase, but the cams relating to other piston and cylinder assemblies in order to provide a somewhat balanced application of the driving forces during each cycle. | 09-18-2014 |
| 20130220281 | METHOD, ENGINE CYLINDER, AND ENGINE WITH OPPOSED SEMI-LOOP SCAVENGING - A method for the reverse scavenging of an engine cylinder and for the introduction of fresh gas into the cylinder and for the discharge of exhaust gas out of the cylinder. The cylinder has oppositely disposed and opposingly driven pistons. In the region of the respective bottom dead center (BDC) of the two pistons, there are formed in the cylinder wall in each case one outlet region for the exhaust gas and in each case one, in particular circumferentially opposite flow transfer region for pre-compressed fresh gas which has been admitted from the crankcase. The fresh gas supplied through the respective flow transfer region is expelled in the direction of the wall region which is situated on that side of the cylinder inner wall and which adjoins the flow transfer region in the cylinder longitudinal direction. | 08-29-2013 |
| 20090165754 | Two-stroke Opposed Cylinder Internal Combustion Engine with Integrated Positive Displacement Supercharger and Regenerator. - A two-stroke internal combustion engine ( | 07-02-2009 |
| 20100192923 | INTERNAL COMBUSTION ENGINES - The invention provides a 2-stroke internal combustion engine comprising two opposed cylinders, each cylinder housing two opposed pistons and having at least one exhaust port and at least one intake port, and a crankshaft having asymmetrically arranged journals and scotch-yoke mechanisms for driving the journals from the pistons. The pistons in each cylinder operate to open its exhaust port or ports before its intake port or ports and to close its exhaust port or ports before its intake port or ports. | 08-05-2010 |
| 20120204841 | Opposed-Piston, Opposed-Cylinder Engine With Collinear Cylinders - An opposed-piston, opposed-cylinder OPOC engine is disclosed in which the central axis of the two cylinders is collinear. In four-stroke engines, this is possible with a built up crankshaft. Disclosed are connecting rod configurations that are suitable for a two-stroke engine that can be assembled to a unitary crankshaft, including both pullrods in tension and pushrods in compression. The configuration includes pistons arranged symmetrically, but with offset timing of the intake and exhaust pistons. The offset timing leads to a slight imbalance which can partially overcome by having the center of gravity of the crankshaft offset from the axis of rotation. | 08-16-2012 |
| 20130133627 | RECIPROCATING PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 05-30-2013 |
| 20160090900 | Multi-Cylinder Opposed Stepped Piston Engine - With reference to FIG. | 03-31-2016 |
| 123051000 | Two-cycle separate crankshaft for piston | 3 |
| 20080210204 | Internal combustion engine - A piston of an internal combustion engine includes a cavity for gases passing a piston ring and a first flow path leading from the cavity to a piston ring region and a second flow path extending from the cavity to an outlet opening for removing gases to an inlet opening in a cylinder wall in at least one piston position. | 09-04-2008 |
| 20080245345 | Oscillating Piston Engine - An oscillating piston engine comprises an internal combustion engine part having a housing part in which there are arranged a first and at least a second piston which can jointly revolve in the housing part about an axis of rotation fixed in relation to the housing and which, when revolving about the axis of rotation, perform reciprocating oscillating movements in opposition to one another about an axis of oscillation extending perpendicularly to the axis of rotation. The first piston has a first end face and the at least second piston has a second end face facing the first end face, the end faces delimiting a working chamber in the direction of oscillation of the pistons. The internal combustion engine part is adjoined in the direction of the axis of rotation by an electromotive part having at least one rotor which is arranged concentrically with the axis of rotation and which is arranged in a housing part adjoining the housing part of the internal combustion engine part. | 10-09-2008 |
| 20090090334 | Opposed piston electromagnetic engine - An engine includes a cylinder having a two pistons slidably disposed therein, a port arranged to admit a reactant into the cylinder between the two pistons, and a converter operable with at least one piston to convert mechanical energy of the piston to electrical energy. | 04-09-2009 |
| 20100071671 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20100147269 | Internal Combustion Engine With Optimal Bore-To-Stroke Ratio - An internal combustion engine. The engine includes at least one cylinder having a bore diameter, a piston for traveling within each cylinder between a first position and a second position, wherein the distance between the first position and the second position defines a stroke length, and thermal barriers on the surfaces of the combustion chamber near top dead center. In one embodiment, the engine utilizes asymmetric effective compression and expansion strokes. To maximize efficiency of the engine, a ratio of the bore diameter to stroke length of the internal combustion engine comprises a range between 0.5 to 1.0. | 06-17-2010 |
| 20100212637 | Cylinder and piston assemblies for opposed piston engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 08-26-2010 |
| 20100212638 | Opposed piston engines with controlled provision of lubricant for lubrication and cooling - In multi-cylinder opposed engine constructions provision of lubricant for lubricating bearings, for cooling cylinders, and for cooling pistons includes pumping an inlet stream of lubricant through a gallery in the engine that is in fluid communication with bearing lubricant passages and cylinder coolant passages and providing lubricant from the inlet stream of lubricant into at least one piston coolant manifold in response to a first engine operating condition. | 08-26-2010 |
| 20100229836 | GUIDED BRIDGE FOR A PISTON IN AN INTERNAL COMBUSTION ENGINE - An improved configuration for internal combustion engine that reduces side forces on pistons during the engine cycle. The improvement is an intermediate and guided bridge element located between pull rods and pistons with articulated connections that allow side forces to be dissipated away from the pistons. | 09-16-2010 |
| 20100319661 | Cylinder-Mounted oil wiper for an opposed piston engine - A ported cylinder for a diesel engine includes a circular groove in the bore, located on the outside of respective port. An oil wiper ring or a group of oil wiper rings is seated in the circular groove for wiping excess lubricating oil from a piston surface. A compressing ring is disposed between the oil wiper ring or group of oil wiper rings and the floor of the circular groove to urge the oil wiper rings into contact with the piston surface. An oil wiper ring construction includes a major surface with oil-conducting channels. | 12-23-2010 |
| 20110083644 | Engine Having Opposed Pistons and Opposed Cylinders and Side Dual Power Output Shafts - An engine having axial inline pistons connected to side power output shafts is disclosed. The engine includes a cylinder defining an interior space of the cylinder; a first piston that reciprocates in the interior space of the cylinder wherein the first piston has a first end forming a first piston head; a first piston rod attached to the first piston at a second end of the first piston opposite the first end of the first piston; a second piston that reciprocates in the interior space of the cylinder, wherein the second piston has a first end forming a second piston head; a second piston rod attached to the second piston at a second end of the second piston opposite the first end of the second piston; a first connecting rod connected to the first piston rod and coupled to a first power output shaft; and a second connecting rod connected to the second piston rod and coupled to the first power output shaft. The first piston head and the second piston head define a combustion chamber in the cylinder between the first piston head and the second piston head, and the first piston head and the second piston head move away from each other on a first power stroke of the first piston and a second power stroke of the second piston. | 04-14-2011 |
| 20110100334 | FUEL INJECTION SYSTEM - An engine includes a first piston with surfaces that define a substantially cylindrical chamber inside the first piston and a passage into the substantially cylindrical chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical chamber and to define, in cooperation with the substantially cylindrical chamber, a combustion chamber. A fuel injector extends at least partially through the passage in the first piston to inject fuel into the combustion chamber. The first piston is arranged to move in a reciprocating manner relative to the fuel injector. | 05-05-2011 |
| 20110132333 | INTERNAL COMBUSTION ENGINE WITH WORKING, PISTON AND CONTROL PISTON - The invention relates to an internal combustion engine comprising two opposed pistons sharing the same cylinder (FIG. | 06-09-2011 |
| 20110146629 | INTERNAL PRESSURE DRIVEN ENGINE - An internal combustion engine or other internal pressure driven engine of the type capable of converting reciprocal linear powered motion into unidirectional rotary motion, the engine having at least one pair of first and second cylinders with each cylinder having a pair of opposed pistons therein forming a pressure chamber therebetween. Outer ends of each piston carries a piston rod connected to a pivot arm of a respective one way clutch which causes the clutch to oscillate back and forth when the piston moves in and out due to pressure or combustion in the pressure chamber. Alternatively, the piston rods may be configured as gear racks in direct operative engagement with pinion gears of the one way clutches. The clutches are parallel and spaced apart from each other near each end of the cylinders. Each clutch carries a gear on one end which intermeshes with a gear rack assembly having gears and a gear rack which drives a crankshaft and auxiliary flywheel operatively connected to a starter. Once the starter is turned on the kinetic energy of the flywheel and gear rack keeps the on/off clutches in continuous oscillation. The oscillating clutches turn unidirectional drive shafts connected through pinion gears to a main output shaft and main flywheel. | 06-23-2011 |
| 20110186017 | Single-crankshaft, opposed-piston engine constructions - Ported engines with opposed pistons are coupled to a single crankshaft through rocker arm linkages. Each pair of opposed pistons is coupled to a single crankpin of the crankshaft. Each piston is coupled to a respective rocker arm linkage by a rolling thrust bearing which prevents linkage movement that is transverse to the axis of the piston from being transferred to the piston. Each piston of a pair of opposed pistons is coupled to the same crankpin by respective rocker arm linkages in which connecting rods run between the crankpin and respective rocker arms. One connecting rod is connected to first rocker arm below the rocker arm's pivot point and another connecting rod is connected to a second rocker arm above the rocker arm's pivot point. | 08-04-2011 |
| 20110259304 | FUEL INJECTION SYSTEM - An engine includes a fuel injector support element to support a fuel injector and define a first opening through which the fuel injector can inject fuel. A first piston defines a substantially cylindrical inner chamber and a portal into the substantially cylindrical inner chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical inner chamber and to define, in cooperation with the substantially cylindrical inner chamber, a combustion chamber. The first fuel injector support element and the first piston are arranged such that, during engine operation, the first piston reciprocates relative to the first fuel injector support element to thereby cause the first opening and the first portal to move in and out of alignment with one another. | 10-27-2011 |
| 20120031379 | Horizontally Opposed Center Fired Engine - The horizontally opposed center fired engine improves on the traditional design of the horizontally opposed engines and center fired engines with a better engine geometry. The present invention utilizes four pairs of opposing pistons to compress a larger volume of air-fuel mixture within four different cylinders. The four different cylinders are radially positioned around a center axle in order to achieve a perfectly symmetric engine geometry. The center axle consists of two different shafts spinning in two different directions, which could drastically reduce engine vibrations in the present invention. Engine vibrations are caused by a change in engine speed and result in a loss of energy. Due to the design, the present invention will only experience energy loss in the form of entropy and friction. Thus, the present invention can convert a higher percentage of chemical energy into mechanical energy than any other internal combustion engine. | 02-09-2012 |
| 20120037129 | OPPOSED PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 02-16-2012 |
| 20120037130 | Opposed-piston engine having a single crankshaft coupled to the opposed pistons by linkages with pivoted rocker arms - An opposed-piston engine with a single crankshaft has a rocker-type linkage coupling the crankshaft to the pistons that utilizes a rotatable pivot rocker arm with full-contact plain bearings. A rocker-type linkage utilizes a rotatable pivot bearing with an eccentric aspect to vary translation of piston linkage along the axial direction of a cylinder, which shifts the top dead center (TDC) and bottom dead center (BDC) locations of a piston so as to change the volume of charge air compressed during the power stroke. | 02-16-2012 |
| 20120055451 | Inwardly Opposed Pistons, Fixed Position Common Cylinder Engine with External Induction - An engine with a design for an inwardly opposed-piston, 4 cycle engine with a common, fixed cylinder and external induction system. The present invention features include a fixed, common cylinder in which 2 pistons move towards each other during the cycling of the engine, external, modular, fix mounted induction and exhaust system, multiple power take off shafts as well as additional cylinder/piston bank modularity. The production of such design provides for increased thermal, mechanical and volumetric efficiency as it relates to similar internal combustion engines. | 03-08-2012 |
| 20120186561 | Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston engines - An opposed piston engine includes at least one cylinder with a bore surface and longitudinally-spaced exhaust and intake ports that open through the sidewall of the cylinder. A pair of opposed pistons is disposed in the cylinder for sliding movement along the bore surface. An oil-retaining surface texture pattern in an interface between the pistons and the bore surface extends in a longitudinal direction of the cylinder, aligned with bridges of at least one port. The surface texture pattern includes a plurality of separate recesses on an outside surface of a skirt of each piston. Alternatively, or in addition, the surface texture pattern includes a plurality of separate recesses extending in a longitudinal direction of the cylinder, aligned with bridges of at least one port. | 07-26-2012 |
| 20120192838 | BALANCED FIVE STROKE, FIVE CYLINDER BARREL CAM TYPE INTERNAL COMBUSTION ENGINE - A balanced five-stroke cycle, five cylinder engine, wherein the five cylinders are parallel and arranged around a shaft mounted in a centrally disposed bore in the engine block, wherein the shaft is parallel to the cylinders, wherein power pistons in the cylinders dwell motionless for the intake part of the cycle between the vacuum stroke and the compression stroke of each power piston; induction of the combustion mixture resulting from the partial vacuum created by the vacuum stroke of the power piston, and wherein the position of each power piston is governed by a power piston cam mounted on the shaft, the shaft and bore on the centroidal axis of symmetry of the radially spaced apart array of five cylinders corresponding to the pistons, the opening and closing of exhaust ports governed by an exhaust piston cam mounted on the shaft moving exhaust pistons along the cylinders. | 08-02-2012 |
| 20120279479 | Heat Recycling Internal Combustion Enines - This patent describes two engine designs capable of recycling waste heat. The engines are both theoretically capable of approaching 100% efficiency in converting fuel to motion, although they use the same thermodynamic cycle as much lower efficiency 4 stroke engines. | 11-08-2012 |
| 20120285422 | Dual crankshaft, opposed-opposed-piston engine constructions - A dual-crankshaft, opposed-piston, internal combustion engine includes one or more ported cylinders. Each cylinder has exhaust and intake ports, and the cylinders are juxtaposed and oriented with exhaust and intake ports mutually aligned. The crankshafts are rotatably mounted at respective exhaust and intake ends of the cylinders and are coupled by a multi-gear train. A pair of pistons is disposed for opposed sliding movement in the bore of each cylinder. All of the pistons controlling the exhaust ports are coupled by connecting rods to the crankshaft mounted near at the exhaust ends of the cylinders, and all of the pistons controlling the intake ports are coupled by connecting rods to the crankshaft mounted near at the intake ends of the cylinders. The crankshafts are connected by a timing belt operative to change the rotational timing between the crankshafts. The gear train support structure is stiffened to suppress gear train vibration. | 11-15-2012 |
| 20120298077 | OPPOSED PISTON ENGINE WITH GAS EXCHANGE CONTROL BY MEANS OF HYDROSTATICALLY MOVED SLIDING SLEEVES - An opposed piston engine with gas exchange control using sliding sleeves embodied on their outer periphery as differential pistons that can be operated as slave pistons. A plunger that is displaceable by a cam is used as a master piston. A hydraulic liquid is housed between the master piston and the slave piston in a closed pipe system. The liquid column housed between the master piston and the slave piston can be displaced back and forth by hydrostatic pressure build-up enabling the gas exchange elements to be opened and closed by the sliding sleeves. | 11-29-2012 |
| 20130112175 | Constructions for Piston Thermal Management - A piston construction with an end surface is equipped with a pattern of insulating cavities embedded in an upper end of the piston, between the end surface and interior portions of the piston that are cooled by circulating liquid coolant. | 05-09-2013 |
| 20130199503 | Opposed-piston cylinder bore constructions with solid lubrication in the top ring reversal zones - A cylinder for an opposed-piston engine is equipped with a cylinder bore that provides solid lubrication of bore/piston surface interfaces in top ring reversal zones of the cylinder bore. | 08-08-2013 |
| 20130206113 | METHOD AND MEANS FOR CONTROLLING COMBUSTION - A method of charging an internal combustion engine with a fuel air mixture, the engine having opposed pistons with a combustion chamber therebetween, wherein the method includes forcing induction air during a compression stroke between a first and a second cylinder via a contraction and expansion or a venturi disposed between the first and second pistons. | 08-15-2013 |
| 20130276761 | VARIABLE-COMPRESSION ENGINE ASSEMBLY - Variable-compression engine assemblies with an internal combustion device and a flywheel are presented herein. An engine assembly is disclosed which includes an output shaft and a flywheel, which includes a variable cam surface and is slidably mounted onto the output shaft and rotatable about a flywheel axis. Also included is an internal combustion device with a piston that is movable along a central axis in a cycle between refracted and extended positions. The piston engages the variable cam surface, and the central axis of the piston is spaced from the flywheel axis. The cycle includes a power stroke when the piston moves from the retracted position to the extended position whereby the piston presses against the variable cam surface and thereby rotates the flywheel, and a compression stroke when the piston moves from the extended position to the retracted position responsive to the variable cam surface. | 10-24-2013 |
| 20130276762 | Symmetric Opposed-Piston, Opposed-Cylinder Engine - An opposed-piston, opposed-cylinder engine is disclosed that has the pistons symmetrically arranged in the opposed cylinders. In one embodiment, the inner pistons are exhaust pistons and the outer pistons are intake pistons. Alternatively, the inner pistons are intake pistons and the outer pistons are exhaust pistons. The pistons are coupled to the crankshaft that is situated between the opposed cylinders. Central axes of the two cylinders are offset by a predetermined distance. The connecting rods that couple between the crankshaft and the pistons are arranged adjacent to each other on journals of the crankshaft. The journal to which the pushrods couple is not a split-pin type. Instead, it is one that has a common central axis. Furthermore, the crankshaft is a one-piece or unitary structure. | 10-24-2013 |
| 20140026864 | Cylinder and Piston Assemblies for Opposed Piston Engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 01-30-2014 |
| 20140083396 | Combustion Chamber Constructions for Opposed-Piston Engines - An opposed-piston engine includes a ported cylinder and a pair of pistons disposed to reciprocate in the bore of the cylinder. A combustion chamber is defined by opposing shaped piston end surfaces as the pistons approach respective top dead center (TDC) locations in the bore. At the end of scavenging, the shaped end surfaces of the pistons interact with swirl to produce turbulence in the charge air motion in the combustion chamber; the additional bulk motions include tumble. Fuel is injected into the turbulent charge air motion along a major axis, of the combustion chamber. | 03-27-2014 |
| 20140090625 | Piston Thermal Management in an Opposed-Piston Engine - An opposed-piston engine includes pistons, each piston having an annular cavity in the piston's sidewall and positioned between its crown and ring grooves to block transfer of heat from the crown to the piston body. | 04-03-2014 |
| 20140102418 | OPPOSED PISTON ENGINE WITH NON-COLLINEAR AXES OF TRANSLATION - An opposed piston internal combustion engine can include two opposed pistons ( | 04-17-2014 |
| 20140109877 | Integrated Piston and Bridge - A piston coupled to a crankshaft via pullrods presents challenges for coupling the piston to the crankshaft because the connections are provided outside the piston. A bridge is coupled to a piston skirt at the end of the piston away from the piston crown. The bridge structure includes: a central support structure, a first projection extending outwardly from the central support structure in a first radial direction, and a second projection extending outwardly from the central support structure in a second radial direction. The central support structure is substantially hollow with a series of internal braces to yield a lightweight piston. | 04-24-2014 |
| 20140130780 | INTERNAL COMBUSTION ENGINE - The invention relates to an engine ( | 05-15-2014 |
| 20140196693 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder) and a crankshaft disposed at one end of the cylinder. Within each cylinder there is a pair of opposed, reciprocating pistons that form a combustion chamber ( | 07-17-2014 |
| 20140299109 | Dual Crankshaft, Opposed-Piston Engines With Variable Crank Phasing - The timing or phasing of port openings and closings during operation of an opposed-piston engine is varied in response to changing engine speeds and loads by changing crankshaft phasing. | 10-09-2014 |
| 20150013649 | Combustion Chamber Constructions For Opposed-Piston Engines - A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity. | 01-15-2015 |
| 20150027418 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder and a pair of opposed, reciprocating pistons within the cylinder forming a combustion chamber therebetween. The engine has at least one combustion igniter associated with the cylinder, a portion of the combustion igniter being exposed within the combustion chamber formed between the opposed pistons. | 01-29-2015 |
| 20150114358 | Master and Slave Pullrods - Master and slave pullrods are disclosed in which a master pullrod is coupled to a journal of a crankshaft. The slave pullrod indirectly couples to the crankshaft by coupling to the master pullrod. Such a configuration allows two connecting rods to be coupled to the journal of the crankshaft inline with each other. | 04-30-2015 |
| 20150122227 | Combustion Chamber Construction with Dual Mixing Regions for Opposed-Piston Engines - A combustion chamber construction for opposed-piston engines in which fuel is injected from two opposed injectors includes a dual mixing region construction with a respective mixing region for each injector and a coupling region between the two mixing regions through which the mixing regions communicate. In some aspects, the mixing regions are bulbous and are connected by a waist, or tunnel, region that is relatively narrower than the bulbous mixing chambers. | 05-07-2015 |
| 20160047296 | Mechanism For Varying Crankshaft Timing On A Belt/Chain Driven, Dual Crankshaft Opposed-Piston Engine - A mechanism for varying crankshaft timing on a belt/chain driven, dual crankshaft opposed-piston engine includes sprockets on corresponding ends of the two crankshafts, connected by a belt or chain which is tensioned by two or more tensioners. By changing the position of the tensioners the length of the two spans of the belt/chain are varied and thus the phase between the crankshafts is varied. | 02-18-2016 |
| 20160053674 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 02-25-2016 |
| 20160061106 | CRANKSHAFT FOR AN INTERNAL COMBUSTION ENGINE - An internal combustion engine includes a crankshaft having a first web portion defining an inner opening and defining an undercut proximate the inner opening, a second web portion defining an inner opening and defining an undercut proximate the inner opening and an inner bearing portion that engages with the inner opening of the first web portion and with the inner opening of the second web portion. First and second pushrods each have a piston end and a crankshaft end. The crankshaft ends of the first and second pushrods each have a concave surface placed over different portions of the inner bearing portion between the first and second web portions, and each further have shoulders adjacent their respective concave surface that engage with the undercuts of the first and second web portions. | 03-03-2016 |
| 20160146164 | DEVICE FOR ADMITTING INLET GASES AND/OR RECIRCULATED EXHAUST GASES INTO AN INTERNAL COMBUSTION ENGINE CYLINDER - The invention relates to a device for admitting inlet gases and/or recirculated exhaust gases into an internal combustion engine cylinder, the device comprising a duct designed to supply said cylinder with inlet gases and/or with recirculated exhaust gases, characterized in that said device further comprises, in the duct, a flow control means that can be operated between a first position in which said duct supplies the cylinder with the inlet gases and a second position in which said duct supplies the cylinder with the recirculated exhaust gases. It also relates to the intake module and to the engine equipped therewith. | 05-26-2016 |
| 20160252012 | INTERNAL COMBUSTION ENGINES | 09-01-2016 |
| 20160252013 | Piston Crown and Corresponding Port Geometry | 09-01-2016 |
| 20160252044 | Engine Block Construction For Opposed Piston Engine | 09-01-2016 |
| 20160252065 | Opposed Piston Three Nozzle Combustion Chamber Design | 09-01-2016 |
| 20160252066 | Fuel Injector with Offset Nozzle Angle | 09-01-2016 |
| 20160252067 | Opposed Piston Three Nozzle Piston Bowl Design | 09-01-2016 |
| 20100071670 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20120118272 | AXIAL-PISTON ENGINE, METHOD FOR OPERATING AN AXIAL-PISTON ENGINE, AND METHOD FOR PRODUCING A HEAT EXCHANGER OF AN AXIAL-PISTON MOTOR - The aim of the invention is to improve the efficiency of an axial-piston motor. To this end, the axial-piston motor comprises at least one compressor cylinder, at least one working cylinder and at least one pressure line guiding the compressed fuel from the compressor cylinder to the working cylinder. A working piston comprising a working rod is provided in the working cylinder, and a compressor piston comprising a compressor rod is provided in the compressor cylinder. The axial-piston motor is characterized in that it at least one of the two rods comprises transverse stiffeners. | 05-17-2012 |
| 20080223342 | Two-Stroke Engine with Variable Compression - The invention consists of a two-stroke opposing cylinder engine that includes a length flushing system and two crankshafts ( | 09-18-2008 |
| 20080271715 | Internal combustion barrel engine - A two-stroke barrel engine includes a power output shaft configured to rotate, an even number of cylinders encircling the power output shaft, wherein each cylinder includes opposing first and second power pistons configured to reciprocate within their respective power cylinder, and a pair of non-rotating wobbleplates opposed and hingedly connected to the power pistons. The wobbleplates are configured to transfer the reciprocating motion of the power pistons to rotary motion of the power output shaft via a nutating motion of the non-rotating wobbleplate. | 11-06-2008 |
| 20100186723 | TWO-CYCLE, OPPOSED-PISTON INTERNAL COMBUSTION ENGINE - In a two-stroke, opposed-piston internal combustion engine with optimized cooling and no engine block, opposed pistons protrude from the bore during at least a portion of an operating cycle of the engine and are cooled by application of a liquid coolant to their interiors. | 07-29-2010 |
| 20120125298 | Two stroke opposed-piston engines with compression release for engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with a decompression port including a valve and a passage with an opening through the cylinder wall that is located between the cylinder's intake and exhaust ports. The decompression port enables release of compressed air from the cylinder after the intake and exhaust ports are closed. The valve is opened to permit compressed air to be released from the cylinder through the passage, and closed to retain compressed air in the cylinder. Engine braking is supported by release of compressed air through the decompression port into an exhaust channel when the pistons are at or near top dead center positions as the cycle transitions from the intake/compression stroke to the power/exhaust stroke. Compression release from the cylinder after intake and exhaust port closure can also support other engine operations. | 05-24-2012 |
| 20120210985 | Two stroke, opposed-piston engines with engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with an engine brake including an engine braking valve that can be opened to release air from the cylinder as the pistons cycle between BDC and TDC positions. | 08-23-2012 |
| 20140238360 | Rocking Journal Bearings for Two-Stroke Cycle Engines - A rocking journal bearing for a two-stroke cycle engine includes a bearing sleeve having a bearing surface with a plurality of axially-spaced, eccentrically-disposed surface segments and a rocking journal having a plurality of axially-spaced, eccentrically-disposed journal segments. The rocking journal is retained for rocking oscillation on the bearing surface. Space for receiving oil is provided in the rocking journal and oil delivery outlets acting through the journal segments deliver received oil to the bearing surfaces. | 08-28-2014 |
| 20140373814 | Air Handling Control for Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 12-25-2014 |
| 20140373815 | Trapped Burned Gas Fraction Control for Opposed-Piston Engines with Uniflow Scavenging - A trapped burned gas fraction is controlled in a two-stroke cycle opposed-piston engine with uniflow scavenging by adjusting an external EGR setpoint in real time. The adjusted setpoint is used to control EGR flow in the engine's air handling system. | 12-25-2014 |
| 20140373816 | System and Method for Air Handling Control in Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, repeatable trapped mass and composition are achieved by determining provision of air handling setpoints that control operation of the engine's air handling system components. In some aspects, these setpoints govern operations of the air handling system by actively controlling the intake manifold pressure (IMP), EGR flow, and exhaust channel backpressure. | 12-25-2014 |
| 20160025002 | IMPROVED OPPOSED PISTON ENGINE - The invention relates to an opposed piston engine comprising at least one cylinder, at least two pistons arranged to be reciprocated within the same cylinder in an opposed manner, at least one intake port through the cylinder wall, at least one exhaust port through the cylinder wall, at least one shaft arranged to be rotated by reciprocal motion of the opposed pistons, at least one reciprocatable sleeve valve within the cylinder for controlling porting of one or both of the at least one intake port and the at least one exhaust port, a sleeve valve driving mechanism for controlling reciprocal motion of the at least one sleeve valve, and a dwell mechanism. The dwell mechanism is configured to induce at least one period of dwell of the at least two pistons during their respective cycles of piston motion. | 01-28-2016 |
| 20160032822 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis, a first inlet port, and a first exhaust port. First pistons are slidably disposed within the first cylinder and are movable toward one another and away from one another. The engine additionally includes a second cylinder having a second longitudinal axis, a second inlet port, and a second exhaust port. The second cylinder is disposed adjacent to the first cylinder with the second inlet port being aligned with the first exhaust port in a first direction extending substantially perpendicular to the first longitudinal axis and the second longitudinal axis, and the second exhaust port being aligned with the first inlet port in the first direction. Second pistons are slidably disposed within the second cylinder and are movable toward one and away from one another. | 02-04-2016 |
| 20160032823 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis and a first pair of pistons slidably disposed within the first cylinder and movable toward one another in a first mode of operation and away from one another in a second mode of operation. The engine additionally includes a second cylinder having a second longitudinal axis and a second pair of pistons slidably disposed within the second cylinder and movable toward one another in the first mode of operation and away from one another in the second mode of operation. A crankshaft is connected to at least one of the first pair of pistons and at least one of the second pair of pistons and has an axis of rotation. The axis of rotation is disposed between and is substantially perpendicular to the first longitudinal axis and the second longitudinal axis. | 02-04-2016 |
| 20160069293 | OPPOSED PISTON TWO-STROKE ENGINE WITH THERMAL BARRIER - In one configuration, the present disclosure provides a cylinder including a first housing, a second housing, and an insert. The first housing includes a first body portion and a first collar portion. The first body portion has a first inner diameter, and the first collar portion has a second inner diameter that is greater than the first inner diameter. The second housing includes a second body portion and a second collar portion. The second body portion has a third inner diameter and the second collar portion has a fourth inner diameter that is greater than the third inner diameter. The second housing is coupled to the first housing such that the first and second collared portions cooperate to form an annular channel. The insert is disposed within the annular channel formed by the first and second collared portions. | 03-10-2016 |
| 20160076468 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 03-17-2016 |
| 20160252004 | HYBRID OPPOSED-PISTON ENGINE SYSTEM | 09-01-2016 |
| 20100282219 | MONOBLOCK VALVELESS OPPOSING PISTON INTERNAL COMBUSTION ENGINE - The present invention provides an internal combustion engine that provides advantages of both typical 2-stroke engines and typical 4-stroke engines, but using a new design unlike either. The present engine provides for use of pistons as means for opening and closing intake and exhaust ports disposed on cylinder walls. It also provides two pistons per cylinder in an opposing configuration, such that one fuel explosion event causes motion of both pistons per cylinder, in opposite directions. Each piston of a cylinder is connected to a separate crankshaft, which completes a single revolution about its axis per fuel explosion event in a cylinder. In a single cycle of piston movement along the cylinder, a full cycle of ignition, exhaust, intake, and compression is achieved. | 11-11-2010 |
| 20130239930 | DUAL CRANKSHAFT ENGINE - A dual-crankshaft engine is presented. In one embodiment, the engine includes a first crankshaft and a second crankshaft. The second crankshaft is coupled with the first crankshaft such that the first crankshaft and the second crankshaft are horizontally coplanar. The engine further includes a first piston that is operable to reciprocate in a first horizontal cylinder via coupling with the first crankshaft, and a second piston that is operable to reciprocate in a second horizontal cylinder via coupling with the second crankshaft. The second horizontal cylinder is horizontally collinear with and opposing the first horizontal cylinder. | 09-19-2013 |
| 20140261338 | In-Line Six Internal Combustion Engine - One non-limiting object of the present invention is to provide modifications to conventional in line 6 cylinder engines capable of increasing their efficiency in operation. This includes modifying the central two adjacent piston and cylinder assemblies of the engines. The modifications involve (1) changing the camshaft so that the central two adjacent piston and cylinder assemblies have their four stroke cycles in phase rather than 180° out of phase, (2) providing a communicating passage between the combustion chambers of the central two piston and cylinder assemblies and (3) modifying either the hardware or programming for the control of the fuel injectors of the central two piston and cylinder assemblies so that they can be selectively controlled not to inject fuel during the operation cycle thereof. The modifications contemplates providing a new cam shaft in which not only the cams relating to the central two adjacent piston and cylinder assemblies are modified to change 180° out of phase to in phase, but the cams relating to other piston and cylinder assemblies in order to provide a somewhat balanced application of the driving forces during each cycle. | 09-18-2014 |
| 20130220281 | METHOD, ENGINE CYLINDER, AND ENGINE WITH OPPOSED SEMI-LOOP SCAVENGING - A method for the reverse scavenging of an engine cylinder and for the introduction of fresh gas into the cylinder and for the discharge of exhaust gas out of the cylinder. The cylinder has oppositely disposed and opposingly driven pistons. In the region of the respective bottom dead center (BDC) of the two pistons, there are formed in the cylinder wall in each case one outlet region for the exhaust gas and in each case one, in particular circumferentially opposite flow transfer region for pre-compressed fresh gas which has been admitted from the crankcase. The fresh gas supplied through the respective flow transfer region is expelled in the direction of the wall region which is situated on that side of the cylinder inner wall and which adjoins the flow transfer region in the cylinder longitudinal direction. | 08-29-2013 |
| 20090165754 | Two-stroke Opposed Cylinder Internal Combustion Engine with Integrated Positive Displacement Supercharger and Regenerator. - A two-stroke internal combustion engine ( | 07-02-2009 |
| 20100192923 | INTERNAL COMBUSTION ENGINES - The invention provides a 2-stroke internal combustion engine comprising two opposed cylinders, each cylinder housing two opposed pistons and having at least one exhaust port and at least one intake port, and a crankshaft having asymmetrically arranged journals and scotch-yoke mechanisms for driving the journals from the pistons. The pistons in each cylinder operate to open its exhaust port or ports before its intake port or ports and to close its exhaust port or ports before its intake port or ports. | 08-05-2010 |
| 20120204841 | Opposed-Piston, Opposed-Cylinder Engine With Collinear Cylinders - An opposed-piston, opposed-cylinder OPOC engine is disclosed in which the central axis of the two cylinders is collinear. In four-stroke engines, this is possible with a built up crankshaft. Disclosed are connecting rod configurations that are suitable for a two-stroke engine that can be assembled to a unitary crankshaft, including both pullrods in tension and pushrods in compression. The configuration includes pistons arranged symmetrically, but with offset timing of the intake and exhaust pistons. The offset timing leads to a slight imbalance which can partially overcome by having the center of gravity of the crankshaft offset from the axis of rotation. | 08-16-2012 |
| 20130133627 | RECIPROCATING PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 05-30-2013 |
| 20160090900 | Multi-Cylinder Opposed Stepped Piston Engine - With reference to FIG. | 03-31-2016 |
| 123051000 | Plural combustion chamber and plural piston | 2 |
| 20080210204 | Internal combustion engine - A piston of an internal combustion engine includes a cavity for gases passing a piston ring and a first flow path leading from the cavity to a piston ring region and a second flow path extending from the cavity to an outlet opening for removing gases to an inlet opening in a cylinder wall in at least one piston position. | 09-04-2008 |
| 20080245345 | Oscillating Piston Engine - An oscillating piston engine comprises an internal combustion engine part having a housing part in which there are arranged a first and at least a second piston which can jointly revolve in the housing part about an axis of rotation fixed in relation to the housing and which, when revolving about the axis of rotation, perform reciprocating oscillating movements in opposition to one another about an axis of oscillation extending perpendicularly to the axis of rotation. The first piston has a first end face and the at least second piston has a second end face facing the first end face, the end faces delimiting a working chamber in the direction of oscillation of the pistons. The internal combustion engine part is adjoined in the direction of the axis of rotation by an electromotive part having at least one rotor which is arranged concentrically with the axis of rotation and which is arranged in a housing part adjoining the housing part of the internal combustion engine part. | 10-09-2008 |
| 20090090334 | Opposed piston electromagnetic engine - An engine includes a cylinder having a two pistons slidably disposed therein, a port arranged to admit a reactant into the cylinder between the two pistons, and a converter operable with at least one piston to convert mechanical energy of the piston to electrical energy. | 04-09-2009 |
| 20100071671 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20100147269 | Internal Combustion Engine With Optimal Bore-To-Stroke Ratio - An internal combustion engine. The engine includes at least one cylinder having a bore diameter, a piston for traveling within each cylinder between a first position and a second position, wherein the distance between the first position and the second position defines a stroke length, and thermal barriers on the surfaces of the combustion chamber near top dead center. In one embodiment, the engine utilizes asymmetric effective compression and expansion strokes. To maximize efficiency of the engine, a ratio of the bore diameter to stroke length of the internal combustion engine comprises a range between 0.5 to 1.0. | 06-17-2010 |
| 20100212637 | Cylinder and piston assemblies for opposed piston engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 08-26-2010 |
| 20100212638 | Opposed piston engines with controlled provision of lubricant for lubrication and cooling - In multi-cylinder opposed engine constructions provision of lubricant for lubricating bearings, for cooling cylinders, and for cooling pistons includes pumping an inlet stream of lubricant through a gallery in the engine that is in fluid communication with bearing lubricant passages and cylinder coolant passages and providing lubricant from the inlet stream of lubricant into at least one piston coolant manifold in response to a first engine operating condition. | 08-26-2010 |
| 20100229836 | GUIDED BRIDGE FOR A PISTON IN AN INTERNAL COMBUSTION ENGINE - An improved configuration for internal combustion engine that reduces side forces on pistons during the engine cycle. The improvement is an intermediate and guided bridge element located between pull rods and pistons with articulated connections that allow side forces to be dissipated away from the pistons. | 09-16-2010 |
| 20100319661 | Cylinder-Mounted oil wiper for an opposed piston engine - A ported cylinder for a diesel engine includes a circular groove in the bore, located on the outside of respective port. An oil wiper ring or a group of oil wiper rings is seated in the circular groove for wiping excess lubricating oil from a piston surface. A compressing ring is disposed between the oil wiper ring or group of oil wiper rings and the floor of the circular groove to urge the oil wiper rings into contact with the piston surface. An oil wiper ring construction includes a major surface with oil-conducting channels. | 12-23-2010 |
| 20110083644 | Engine Having Opposed Pistons and Opposed Cylinders and Side Dual Power Output Shafts - An engine having axial inline pistons connected to side power output shafts is disclosed. The engine includes a cylinder defining an interior space of the cylinder; a first piston that reciprocates in the interior space of the cylinder wherein the first piston has a first end forming a first piston head; a first piston rod attached to the first piston at a second end of the first piston opposite the first end of the first piston; a second piston that reciprocates in the interior space of the cylinder, wherein the second piston has a first end forming a second piston head; a second piston rod attached to the second piston at a second end of the second piston opposite the first end of the second piston; a first connecting rod connected to the first piston rod and coupled to a first power output shaft; and a second connecting rod connected to the second piston rod and coupled to the first power output shaft. The first piston head and the second piston head define a combustion chamber in the cylinder between the first piston head and the second piston head, and the first piston head and the second piston head move away from each other on a first power stroke of the first piston and a second power stroke of the second piston. | 04-14-2011 |
| 20110100334 | FUEL INJECTION SYSTEM - An engine includes a first piston with surfaces that define a substantially cylindrical chamber inside the first piston and a passage into the substantially cylindrical chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical chamber and to define, in cooperation with the substantially cylindrical chamber, a combustion chamber. A fuel injector extends at least partially through the passage in the first piston to inject fuel into the combustion chamber. The first piston is arranged to move in a reciprocating manner relative to the fuel injector. | 05-05-2011 |
| 20110132333 | INTERNAL COMBUSTION ENGINE WITH WORKING, PISTON AND CONTROL PISTON - The invention relates to an internal combustion engine comprising two opposed pistons sharing the same cylinder (FIG. | 06-09-2011 |
| 20110146629 | INTERNAL PRESSURE DRIVEN ENGINE - An internal combustion engine or other internal pressure driven engine of the type capable of converting reciprocal linear powered motion into unidirectional rotary motion, the engine having at least one pair of first and second cylinders with each cylinder having a pair of opposed pistons therein forming a pressure chamber therebetween. Outer ends of each piston carries a piston rod connected to a pivot arm of a respective one way clutch which causes the clutch to oscillate back and forth when the piston moves in and out due to pressure or combustion in the pressure chamber. Alternatively, the piston rods may be configured as gear racks in direct operative engagement with pinion gears of the one way clutches. The clutches are parallel and spaced apart from each other near each end of the cylinders. Each clutch carries a gear on one end which intermeshes with a gear rack assembly having gears and a gear rack which drives a crankshaft and auxiliary flywheel operatively connected to a starter. Once the starter is turned on the kinetic energy of the flywheel and gear rack keeps the on/off clutches in continuous oscillation. The oscillating clutches turn unidirectional drive shafts connected through pinion gears to a main output shaft and main flywheel. | 06-23-2011 |
| 20110186017 | Single-crankshaft, opposed-piston engine constructions - Ported engines with opposed pistons are coupled to a single crankshaft through rocker arm linkages. Each pair of opposed pistons is coupled to a single crankpin of the crankshaft. Each piston is coupled to a respective rocker arm linkage by a rolling thrust bearing which prevents linkage movement that is transverse to the axis of the piston from being transferred to the piston. Each piston of a pair of opposed pistons is coupled to the same crankpin by respective rocker arm linkages in which connecting rods run between the crankpin and respective rocker arms. One connecting rod is connected to first rocker arm below the rocker arm's pivot point and another connecting rod is connected to a second rocker arm above the rocker arm's pivot point. | 08-04-2011 |
| 20110259304 | FUEL INJECTION SYSTEM - An engine includes a fuel injector support element to support a fuel injector and define a first opening through which the fuel injector can inject fuel. A first piston defines a substantially cylindrical inner chamber and a portal into the substantially cylindrical inner chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical inner chamber and to define, in cooperation with the substantially cylindrical inner chamber, a combustion chamber. The first fuel injector support element and the first piston are arranged such that, during engine operation, the first piston reciprocates relative to the first fuel injector support element to thereby cause the first opening and the first portal to move in and out of alignment with one another. | 10-27-2011 |
| 20120031379 | Horizontally Opposed Center Fired Engine - The horizontally opposed center fired engine improves on the traditional design of the horizontally opposed engines and center fired engines with a better engine geometry. The present invention utilizes four pairs of opposing pistons to compress a larger volume of air-fuel mixture within four different cylinders. The four different cylinders are radially positioned around a center axle in order to achieve a perfectly symmetric engine geometry. The center axle consists of two different shafts spinning in two different directions, which could drastically reduce engine vibrations in the present invention. Engine vibrations are caused by a change in engine speed and result in a loss of energy. Due to the design, the present invention will only experience energy loss in the form of entropy and friction. Thus, the present invention can convert a higher percentage of chemical energy into mechanical energy than any other internal combustion engine. | 02-09-2012 |
| 20120037129 | OPPOSED PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 02-16-2012 |
| 20120037130 | Opposed-piston engine having a single crankshaft coupled to the opposed pistons by linkages with pivoted rocker arms - An opposed-piston engine with a single crankshaft has a rocker-type linkage coupling the crankshaft to the pistons that utilizes a rotatable pivot rocker arm with full-contact plain bearings. A rocker-type linkage utilizes a rotatable pivot bearing with an eccentric aspect to vary translation of piston linkage along the axial direction of a cylinder, which shifts the top dead center (TDC) and bottom dead center (BDC) locations of a piston so as to change the volume of charge air compressed during the power stroke. | 02-16-2012 |
| 20120055451 | Inwardly Opposed Pistons, Fixed Position Common Cylinder Engine with External Induction - An engine with a design for an inwardly opposed-piston, 4 cycle engine with a common, fixed cylinder and external induction system. The present invention features include a fixed, common cylinder in which 2 pistons move towards each other during the cycling of the engine, external, modular, fix mounted induction and exhaust system, multiple power take off shafts as well as additional cylinder/piston bank modularity. The production of such design provides for increased thermal, mechanical and volumetric efficiency as it relates to similar internal combustion engines. | 03-08-2012 |
| 20120186561 | Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston engines - An opposed piston engine includes at least one cylinder with a bore surface and longitudinally-spaced exhaust and intake ports that open through the sidewall of the cylinder. A pair of opposed pistons is disposed in the cylinder for sliding movement along the bore surface. An oil-retaining surface texture pattern in an interface between the pistons and the bore surface extends in a longitudinal direction of the cylinder, aligned with bridges of at least one port. The surface texture pattern includes a plurality of separate recesses on an outside surface of a skirt of each piston. Alternatively, or in addition, the surface texture pattern includes a plurality of separate recesses extending in a longitudinal direction of the cylinder, aligned with bridges of at least one port. | 07-26-2012 |
| 20120192838 | BALANCED FIVE STROKE, FIVE CYLINDER BARREL CAM TYPE INTERNAL COMBUSTION ENGINE - A balanced five-stroke cycle, five cylinder engine, wherein the five cylinders are parallel and arranged around a shaft mounted in a centrally disposed bore in the engine block, wherein the shaft is parallel to the cylinders, wherein power pistons in the cylinders dwell motionless for the intake part of the cycle between the vacuum stroke and the compression stroke of each power piston; induction of the combustion mixture resulting from the partial vacuum created by the vacuum stroke of the power piston, and wherein the position of each power piston is governed by a power piston cam mounted on the shaft, the shaft and bore on the centroidal axis of symmetry of the radially spaced apart array of five cylinders corresponding to the pistons, the opening and closing of exhaust ports governed by an exhaust piston cam mounted on the shaft moving exhaust pistons along the cylinders. | 08-02-2012 |
| 20120279479 | Heat Recycling Internal Combustion Enines - This patent describes two engine designs capable of recycling waste heat. The engines are both theoretically capable of approaching 100% efficiency in converting fuel to motion, although they use the same thermodynamic cycle as much lower efficiency 4 stroke engines. | 11-08-2012 |
| 20120285422 | Dual crankshaft, opposed-opposed-piston engine constructions - A dual-crankshaft, opposed-piston, internal combustion engine includes one or more ported cylinders. Each cylinder has exhaust and intake ports, and the cylinders are juxtaposed and oriented with exhaust and intake ports mutually aligned. The crankshafts are rotatably mounted at respective exhaust and intake ends of the cylinders and are coupled by a multi-gear train. A pair of pistons is disposed for opposed sliding movement in the bore of each cylinder. All of the pistons controlling the exhaust ports are coupled by connecting rods to the crankshaft mounted near at the exhaust ends of the cylinders, and all of the pistons controlling the intake ports are coupled by connecting rods to the crankshaft mounted near at the intake ends of the cylinders. The crankshafts are connected by a timing belt operative to change the rotational timing between the crankshafts. The gear train support structure is stiffened to suppress gear train vibration. | 11-15-2012 |
| 20120298077 | OPPOSED PISTON ENGINE WITH GAS EXCHANGE CONTROL BY MEANS OF HYDROSTATICALLY MOVED SLIDING SLEEVES - An opposed piston engine with gas exchange control using sliding sleeves embodied on their outer periphery as differential pistons that can be operated as slave pistons. A plunger that is displaceable by a cam is used as a master piston. A hydraulic liquid is housed between the master piston and the slave piston in a closed pipe system. The liquid column housed between the master piston and the slave piston can be displaced back and forth by hydrostatic pressure build-up enabling the gas exchange elements to be opened and closed by the sliding sleeves. | 11-29-2012 |
| 20130112175 | Constructions for Piston Thermal Management - A piston construction with an end surface is equipped with a pattern of insulating cavities embedded in an upper end of the piston, between the end surface and interior portions of the piston that are cooled by circulating liquid coolant. | 05-09-2013 |
| 20130199503 | Opposed-piston cylinder bore constructions with solid lubrication in the top ring reversal zones - A cylinder for an opposed-piston engine is equipped with a cylinder bore that provides solid lubrication of bore/piston surface interfaces in top ring reversal zones of the cylinder bore. | 08-08-2013 |
| 20130206113 | METHOD AND MEANS FOR CONTROLLING COMBUSTION - A method of charging an internal combustion engine with a fuel air mixture, the engine having opposed pistons with a combustion chamber therebetween, wherein the method includes forcing induction air during a compression stroke between a first and a second cylinder via a contraction and expansion or a venturi disposed between the first and second pistons. | 08-15-2013 |
| 20130276761 | VARIABLE-COMPRESSION ENGINE ASSEMBLY - Variable-compression engine assemblies with an internal combustion device and a flywheel are presented herein. An engine assembly is disclosed which includes an output shaft and a flywheel, which includes a variable cam surface and is slidably mounted onto the output shaft and rotatable about a flywheel axis. Also included is an internal combustion device with a piston that is movable along a central axis in a cycle between refracted and extended positions. The piston engages the variable cam surface, and the central axis of the piston is spaced from the flywheel axis. The cycle includes a power stroke when the piston moves from the retracted position to the extended position whereby the piston presses against the variable cam surface and thereby rotates the flywheel, and a compression stroke when the piston moves from the extended position to the retracted position responsive to the variable cam surface. | 10-24-2013 |
| 20130276762 | Symmetric Opposed-Piston, Opposed-Cylinder Engine - An opposed-piston, opposed-cylinder engine is disclosed that has the pistons symmetrically arranged in the opposed cylinders. In one embodiment, the inner pistons are exhaust pistons and the outer pistons are intake pistons. Alternatively, the inner pistons are intake pistons and the outer pistons are exhaust pistons. The pistons are coupled to the crankshaft that is situated between the opposed cylinders. Central axes of the two cylinders are offset by a predetermined distance. The connecting rods that couple between the crankshaft and the pistons are arranged adjacent to each other on journals of the crankshaft. The journal to which the pushrods couple is not a split-pin type. Instead, it is one that has a common central axis. Furthermore, the crankshaft is a one-piece or unitary structure. | 10-24-2013 |
| 20140026864 | Cylinder and Piston Assemblies for Opposed Piston Engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 01-30-2014 |
| 20140083396 | Combustion Chamber Constructions for Opposed-Piston Engines - An opposed-piston engine includes a ported cylinder and a pair of pistons disposed to reciprocate in the bore of the cylinder. A combustion chamber is defined by opposing shaped piston end surfaces as the pistons approach respective top dead center (TDC) locations in the bore. At the end of scavenging, the shaped end surfaces of the pistons interact with swirl to produce turbulence in the charge air motion in the combustion chamber; the additional bulk motions include tumble. Fuel is injected into the turbulent charge air motion along a major axis, of the combustion chamber. | 03-27-2014 |
| 20140090625 | Piston Thermal Management in an Opposed-Piston Engine - An opposed-piston engine includes pistons, each piston having an annular cavity in the piston's sidewall and positioned between its crown and ring grooves to block transfer of heat from the crown to the piston body. | 04-03-2014 |
| 20140102418 | OPPOSED PISTON ENGINE WITH NON-COLLINEAR AXES OF TRANSLATION - An opposed piston internal combustion engine can include two opposed pistons ( | 04-17-2014 |
| 20140109877 | Integrated Piston and Bridge - A piston coupled to a crankshaft via pullrods presents challenges for coupling the piston to the crankshaft because the connections are provided outside the piston. A bridge is coupled to a piston skirt at the end of the piston away from the piston crown. The bridge structure includes: a central support structure, a first projection extending outwardly from the central support structure in a first radial direction, and a second projection extending outwardly from the central support structure in a second radial direction. The central support structure is substantially hollow with a series of internal braces to yield a lightweight piston. | 04-24-2014 |
| 20140130780 | INTERNAL COMBUSTION ENGINE - The invention relates to an engine ( | 05-15-2014 |
| 20140196693 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder) and a crankshaft disposed at one end of the cylinder. Within each cylinder there is a pair of opposed, reciprocating pistons that form a combustion chamber ( | 07-17-2014 |
| 20140299109 | Dual Crankshaft, Opposed-Piston Engines With Variable Crank Phasing - The timing or phasing of port openings and closings during operation of an opposed-piston engine is varied in response to changing engine speeds and loads by changing crankshaft phasing. | 10-09-2014 |
| 20150013649 | Combustion Chamber Constructions For Opposed-Piston Engines - A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity. | 01-15-2015 |
| 20150027418 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder and a pair of opposed, reciprocating pistons within the cylinder forming a combustion chamber therebetween. The engine has at least one combustion igniter associated with the cylinder, a portion of the combustion igniter being exposed within the combustion chamber formed between the opposed pistons. | 01-29-2015 |
| 20150114358 | Master and Slave Pullrods - Master and slave pullrods are disclosed in which a master pullrod is coupled to a journal of a crankshaft. The slave pullrod indirectly couples to the crankshaft by coupling to the master pullrod. Such a configuration allows two connecting rods to be coupled to the journal of the crankshaft inline with each other. | 04-30-2015 |
| 20150122227 | Combustion Chamber Construction with Dual Mixing Regions for Opposed-Piston Engines - A combustion chamber construction for opposed-piston engines in which fuel is injected from two opposed injectors includes a dual mixing region construction with a respective mixing region for each injector and a coupling region between the two mixing regions through which the mixing regions communicate. In some aspects, the mixing regions are bulbous and are connected by a waist, or tunnel, region that is relatively narrower than the bulbous mixing chambers. | 05-07-2015 |
| 20160047296 | Mechanism For Varying Crankshaft Timing On A Belt/Chain Driven, Dual Crankshaft Opposed-Piston Engine - A mechanism for varying crankshaft timing on a belt/chain driven, dual crankshaft opposed-piston engine includes sprockets on corresponding ends of the two crankshafts, connected by a belt or chain which is tensioned by two or more tensioners. By changing the position of the tensioners the length of the two spans of the belt/chain are varied and thus the phase between the crankshafts is varied. | 02-18-2016 |
| 20160053674 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 02-25-2016 |
| 20160061106 | CRANKSHAFT FOR AN INTERNAL COMBUSTION ENGINE - An internal combustion engine includes a crankshaft having a first web portion defining an inner opening and defining an undercut proximate the inner opening, a second web portion defining an inner opening and defining an undercut proximate the inner opening and an inner bearing portion that engages with the inner opening of the first web portion and with the inner opening of the second web portion. First and second pushrods each have a piston end and a crankshaft end. The crankshaft ends of the first and second pushrods each have a concave surface placed over different portions of the inner bearing portion between the first and second web portions, and each further have shoulders adjacent their respective concave surface that engage with the undercuts of the first and second web portions. | 03-03-2016 |
| 20160146164 | DEVICE FOR ADMITTING INLET GASES AND/OR RECIRCULATED EXHAUST GASES INTO AN INTERNAL COMBUSTION ENGINE CYLINDER - The invention relates to a device for admitting inlet gases and/or recirculated exhaust gases into an internal combustion engine cylinder, the device comprising a duct designed to supply said cylinder with inlet gases and/or with recirculated exhaust gases, characterized in that said device further comprises, in the duct, a flow control means that can be operated between a first position in which said duct supplies the cylinder with the inlet gases and a second position in which said duct supplies the cylinder with the recirculated exhaust gases. It also relates to the intake module and to the engine equipped therewith. | 05-26-2016 |
| 20160252012 | INTERNAL COMBUSTION ENGINES | 09-01-2016 |
| 20160252013 | Piston Crown and Corresponding Port Geometry | 09-01-2016 |
| 20160252044 | Engine Block Construction For Opposed Piston Engine | 09-01-2016 |
| 20160252065 | Opposed Piston Three Nozzle Combustion Chamber Design | 09-01-2016 |
| 20160252066 | Fuel Injector with Offset Nozzle Angle | 09-01-2016 |
| 20160252067 | Opposed Piston Three Nozzle Piston Bowl Design | 09-01-2016 |
| 20100071670 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20120118272 | AXIAL-PISTON ENGINE, METHOD FOR OPERATING AN AXIAL-PISTON ENGINE, AND METHOD FOR PRODUCING A HEAT EXCHANGER OF AN AXIAL-PISTON MOTOR - The aim of the invention is to improve the efficiency of an axial-piston motor. To this end, the axial-piston motor comprises at least one compressor cylinder, at least one working cylinder and at least one pressure line guiding the compressed fuel from the compressor cylinder to the working cylinder. A working piston comprising a working rod is provided in the working cylinder, and a compressor piston comprising a compressor rod is provided in the compressor cylinder. The axial-piston motor is characterized in that it at least one of the two rods comprises transverse stiffeners. | 05-17-2012 |
| 20080223342 | Two-Stroke Engine with Variable Compression - The invention consists of a two-stroke opposing cylinder engine that includes a length flushing system and two crankshafts ( | 09-18-2008 |
| 20080271715 | Internal combustion barrel engine - A two-stroke barrel engine includes a power output shaft configured to rotate, an even number of cylinders encircling the power output shaft, wherein each cylinder includes opposing first and second power pistons configured to reciprocate within their respective power cylinder, and a pair of non-rotating wobbleplates opposed and hingedly connected to the power pistons. The wobbleplates are configured to transfer the reciprocating motion of the power pistons to rotary motion of the power output shaft via a nutating motion of the non-rotating wobbleplate. | 11-06-2008 |
| 20100186723 | TWO-CYCLE, OPPOSED-PISTON INTERNAL COMBUSTION ENGINE - In a two-stroke, opposed-piston internal combustion engine with optimized cooling and no engine block, opposed pistons protrude from the bore during at least a portion of an operating cycle of the engine and are cooled by application of a liquid coolant to their interiors. | 07-29-2010 |
| 20120125298 | Two stroke opposed-piston engines with compression release for engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with a decompression port including a valve and a passage with an opening through the cylinder wall that is located between the cylinder's intake and exhaust ports. The decompression port enables release of compressed air from the cylinder after the intake and exhaust ports are closed. The valve is opened to permit compressed air to be released from the cylinder through the passage, and closed to retain compressed air in the cylinder. Engine braking is supported by release of compressed air through the decompression port into an exhaust channel when the pistons are at or near top dead center positions as the cycle transitions from the intake/compression stroke to the power/exhaust stroke. Compression release from the cylinder after intake and exhaust port closure can also support other engine operations. | 05-24-2012 |
| 20120210985 | Two stroke, opposed-piston engines with engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with an engine brake including an engine braking valve that can be opened to release air from the cylinder as the pistons cycle between BDC and TDC positions. | 08-23-2012 |
| 20140238360 | Rocking Journal Bearings for Two-Stroke Cycle Engines - A rocking journal bearing for a two-stroke cycle engine includes a bearing sleeve having a bearing surface with a plurality of axially-spaced, eccentrically-disposed surface segments and a rocking journal having a plurality of axially-spaced, eccentrically-disposed journal segments. The rocking journal is retained for rocking oscillation on the bearing surface. Space for receiving oil is provided in the rocking journal and oil delivery outlets acting through the journal segments deliver received oil to the bearing surfaces. | 08-28-2014 |
| 20140373814 | Air Handling Control for Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 12-25-2014 |
| 20140373815 | Trapped Burned Gas Fraction Control for Opposed-Piston Engines with Uniflow Scavenging - A trapped burned gas fraction is controlled in a two-stroke cycle opposed-piston engine with uniflow scavenging by adjusting an external EGR setpoint in real time. The adjusted setpoint is used to control EGR flow in the engine's air handling system. | 12-25-2014 |
| 20140373816 | System and Method for Air Handling Control in Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, repeatable trapped mass and composition are achieved by determining provision of air handling setpoints that control operation of the engine's air handling system components. In some aspects, these setpoints govern operations of the air handling system by actively controlling the intake manifold pressure (IMP), EGR flow, and exhaust channel backpressure. | 12-25-2014 |
| 20160025002 | IMPROVED OPPOSED PISTON ENGINE - The invention relates to an opposed piston engine comprising at least one cylinder, at least two pistons arranged to be reciprocated within the same cylinder in an opposed manner, at least one intake port through the cylinder wall, at least one exhaust port through the cylinder wall, at least one shaft arranged to be rotated by reciprocal motion of the opposed pistons, at least one reciprocatable sleeve valve within the cylinder for controlling porting of one or both of the at least one intake port and the at least one exhaust port, a sleeve valve driving mechanism for controlling reciprocal motion of the at least one sleeve valve, and a dwell mechanism. The dwell mechanism is configured to induce at least one period of dwell of the at least two pistons during their respective cycles of piston motion. | 01-28-2016 |
| 20160032822 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis, a first inlet port, and a first exhaust port. First pistons are slidably disposed within the first cylinder and are movable toward one another and away from one another. The engine additionally includes a second cylinder having a second longitudinal axis, a second inlet port, and a second exhaust port. The second cylinder is disposed adjacent to the first cylinder with the second inlet port being aligned with the first exhaust port in a first direction extending substantially perpendicular to the first longitudinal axis and the second longitudinal axis, and the second exhaust port being aligned with the first inlet port in the first direction. Second pistons are slidably disposed within the second cylinder and are movable toward one and away from one another. | 02-04-2016 |
| 20160032823 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis and a first pair of pistons slidably disposed within the first cylinder and movable toward one another in a first mode of operation and away from one another in a second mode of operation. The engine additionally includes a second cylinder having a second longitudinal axis and a second pair of pistons slidably disposed within the second cylinder and movable toward one another in the first mode of operation and away from one another in the second mode of operation. A crankshaft is connected to at least one of the first pair of pistons and at least one of the second pair of pistons and has an axis of rotation. The axis of rotation is disposed between and is substantially perpendicular to the first longitudinal axis and the second longitudinal axis. | 02-04-2016 |
| 20160069293 | OPPOSED PISTON TWO-STROKE ENGINE WITH THERMAL BARRIER - In one configuration, the present disclosure provides a cylinder including a first housing, a second housing, and an insert. The first housing includes a first body portion and a first collar portion. The first body portion has a first inner diameter, and the first collar portion has a second inner diameter that is greater than the first inner diameter. The second housing includes a second body portion and a second collar portion. The second body portion has a third inner diameter and the second collar portion has a fourth inner diameter that is greater than the third inner diameter. The second housing is coupled to the first housing such that the first and second collared portions cooperate to form an annular channel. The insert is disposed within the annular channel formed by the first and second collared portions. | 03-10-2016 |
| 20160076468 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 03-17-2016 |
| 20160252004 | HYBRID OPPOSED-PISTON ENGINE SYSTEM | 09-01-2016 |
| 20100282219 | MONOBLOCK VALVELESS OPPOSING PISTON INTERNAL COMBUSTION ENGINE - The present invention provides an internal combustion engine that provides advantages of both typical 2-stroke engines and typical 4-stroke engines, but using a new design unlike either. The present engine provides for use of pistons as means for opening and closing intake and exhaust ports disposed on cylinder walls. It also provides two pistons per cylinder in an opposing configuration, such that one fuel explosion event causes motion of both pistons per cylinder, in opposite directions. Each piston of a cylinder is connected to a separate crankshaft, which completes a single revolution about its axis per fuel explosion event in a cylinder. In a single cycle of piston movement along the cylinder, a full cycle of ignition, exhaust, intake, and compression is achieved. | 11-11-2010 |
| 20130239930 | DUAL CRANKSHAFT ENGINE - A dual-crankshaft engine is presented. In one embodiment, the engine includes a first crankshaft and a second crankshaft. The second crankshaft is coupled with the first crankshaft such that the first crankshaft and the second crankshaft are horizontally coplanar. The engine further includes a first piston that is operable to reciprocate in a first horizontal cylinder via coupling with the first crankshaft, and a second piston that is operable to reciprocate in a second horizontal cylinder via coupling with the second crankshaft. The second horizontal cylinder is horizontally collinear with and opposing the first horizontal cylinder. | 09-19-2013 |
| 20140261338 | In-Line Six Internal Combustion Engine - One non-limiting object of the present invention is to provide modifications to conventional in line 6 cylinder engines capable of increasing their efficiency in operation. This includes modifying the central two adjacent piston and cylinder assemblies of the engines. The modifications involve (1) changing the camshaft so that the central two adjacent piston and cylinder assemblies have their four stroke cycles in phase rather than 180° out of phase, (2) providing a communicating passage between the combustion chambers of the central two piston and cylinder assemblies and (3) modifying either the hardware or programming for the control of the fuel injectors of the central two piston and cylinder assemblies so that they can be selectively controlled not to inject fuel during the operation cycle thereof. The modifications contemplates providing a new cam shaft in which not only the cams relating to the central two adjacent piston and cylinder assemblies are modified to change 180° out of phase to in phase, but the cams relating to other piston and cylinder assemblies in order to provide a somewhat balanced application of the driving forces during each cycle. | 09-18-2014 |
| 20130220281 | METHOD, ENGINE CYLINDER, AND ENGINE WITH OPPOSED SEMI-LOOP SCAVENGING - A method for the reverse scavenging of an engine cylinder and for the introduction of fresh gas into the cylinder and for the discharge of exhaust gas out of the cylinder. The cylinder has oppositely disposed and opposingly driven pistons. In the region of the respective bottom dead center (BDC) of the two pistons, there are formed in the cylinder wall in each case one outlet region for the exhaust gas and in each case one, in particular circumferentially opposite flow transfer region for pre-compressed fresh gas which has been admitted from the crankcase. The fresh gas supplied through the respective flow transfer region is expelled in the direction of the wall region which is situated on that side of the cylinder inner wall and which adjoins the flow transfer region in the cylinder longitudinal direction. | 08-29-2013 |
| 20090165754 | Two-stroke Opposed Cylinder Internal Combustion Engine with Integrated Positive Displacement Supercharger and Regenerator. - A two-stroke internal combustion engine ( | 07-02-2009 |
| 20100192923 | INTERNAL COMBUSTION ENGINES - The invention provides a 2-stroke internal combustion engine comprising two opposed cylinders, each cylinder housing two opposed pistons and having at least one exhaust port and at least one intake port, and a crankshaft having asymmetrically arranged journals and scotch-yoke mechanisms for driving the journals from the pistons. The pistons in each cylinder operate to open its exhaust port or ports before its intake port or ports and to close its exhaust port or ports before its intake port or ports. | 08-05-2010 |
| 20120204841 | Opposed-Piston, Opposed-Cylinder Engine With Collinear Cylinders - An opposed-piston, opposed-cylinder OPOC engine is disclosed in which the central axis of the two cylinders is collinear. In four-stroke engines, this is possible with a built up crankshaft. Disclosed are connecting rod configurations that are suitable for a two-stroke engine that can be assembled to a unitary crankshaft, including both pullrods in tension and pushrods in compression. The configuration includes pistons arranged symmetrically, but with offset timing of the intake and exhaust pistons. The offset timing leads to a slight imbalance which can partially overcome by having the center of gravity of the crankshaft offset from the axis of rotation. | 08-16-2012 |
| 20130133627 | RECIPROCATING PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 05-30-2013 |
| 20160090900 | Multi-Cylinder Opposed Stepped Piston Engine - With reference to FIG. | 03-31-2016 |
| 123051000 | Inlet or exhaust ports in two or more planes | 1 |
| 20080210204 | Internal combustion engine - A piston of an internal combustion engine includes a cavity for gases passing a piston ring and a first flow path leading from the cavity to a piston ring region and a second flow path extending from the cavity to an outlet opening for removing gases to an inlet opening in a cylinder wall in at least one piston position. | 09-04-2008 |
| 20080245345 | Oscillating Piston Engine - An oscillating piston engine comprises an internal combustion engine part having a housing part in which there are arranged a first and at least a second piston which can jointly revolve in the housing part about an axis of rotation fixed in relation to the housing and which, when revolving about the axis of rotation, perform reciprocating oscillating movements in opposition to one another about an axis of oscillation extending perpendicularly to the axis of rotation. The first piston has a first end face and the at least second piston has a second end face facing the first end face, the end faces delimiting a working chamber in the direction of oscillation of the pistons. The internal combustion engine part is adjoined in the direction of the axis of rotation by an electromotive part having at least one rotor which is arranged concentrically with the axis of rotation and which is arranged in a housing part adjoining the housing part of the internal combustion engine part. | 10-09-2008 |
| 20090090334 | Opposed piston electromagnetic engine - An engine includes a cylinder having a two pistons slidably disposed therein, a port arranged to admit a reactant into the cylinder between the two pistons, and a converter operable with at least one piston to convert mechanical energy of the piston to electrical energy. | 04-09-2009 |
| 20100071671 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20100147269 | Internal Combustion Engine With Optimal Bore-To-Stroke Ratio - An internal combustion engine. The engine includes at least one cylinder having a bore diameter, a piston for traveling within each cylinder between a first position and a second position, wherein the distance between the first position and the second position defines a stroke length, and thermal barriers on the surfaces of the combustion chamber near top dead center. In one embodiment, the engine utilizes asymmetric effective compression and expansion strokes. To maximize efficiency of the engine, a ratio of the bore diameter to stroke length of the internal combustion engine comprises a range between 0.5 to 1.0. | 06-17-2010 |
| 20100212637 | Cylinder and piston assemblies for opposed piston engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 08-26-2010 |
| 20100212638 | Opposed piston engines with controlled provision of lubricant for lubrication and cooling - In multi-cylinder opposed engine constructions provision of lubricant for lubricating bearings, for cooling cylinders, and for cooling pistons includes pumping an inlet stream of lubricant through a gallery in the engine that is in fluid communication with bearing lubricant passages and cylinder coolant passages and providing lubricant from the inlet stream of lubricant into at least one piston coolant manifold in response to a first engine operating condition. | 08-26-2010 |
| 20100229836 | GUIDED BRIDGE FOR A PISTON IN AN INTERNAL COMBUSTION ENGINE - An improved configuration for internal combustion engine that reduces side forces on pistons during the engine cycle. The improvement is an intermediate and guided bridge element located between pull rods and pistons with articulated connections that allow side forces to be dissipated away from the pistons. | 09-16-2010 |
| 20100319661 | Cylinder-Mounted oil wiper for an opposed piston engine - A ported cylinder for a diesel engine includes a circular groove in the bore, located on the outside of respective port. An oil wiper ring or a group of oil wiper rings is seated in the circular groove for wiping excess lubricating oil from a piston surface. A compressing ring is disposed between the oil wiper ring or group of oil wiper rings and the floor of the circular groove to urge the oil wiper rings into contact with the piston surface. An oil wiper ring construction includes a major surface with oil-conducting channels. | 12-23-2010 |
| 20110083644 | Engine Having Opposed Pistons and Opposed Cylinders and Side Dual Power Output Shafts - An engine having axial inline pistons connected to side power output shafts is disclosed. The engine includes a cylinder defining an interior space of the cylinder; a first piston that reciprocates in the interior space of the cylinder wherein the first piston has a first end forming a first piston head; a first piston rod attached to the first piston at a second end of the first piston opposite the first end of the first piston; a second piston that reciprocates in the interior space of the cylinder, wherein the second piston has a first end forming a second piston head; a second piston rod attached to the second piston at a second end of the second piston opposite the first end of the second piston; a first connecting rod connected to the first piston rod and coupled to a first power output shaft; and a second connecting rod connected to the second piston rod and coupled to the first power output shaft. The first piston head and the second piston head define a combustion chamber in the cylinder between the first piston head and the second piston head, and the first piston head and the second piston head move away from each other on a first power stroke of the first piston and a second power stroke of the second piston. | 04-14-2011 |
| 20110100334 | FUEL INJECTION SYSTEM - An engine includes a first piston with surfaces that define a substantially cylindrical chamber inside the first piston and a passage into the substantially cylindrical chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical chamber and to define, in cooperation with the substantially cylindrical chamber, a combustion chamber. A fuel injector extends at least partially through the passage in the first piston to inject fuel into the combustion chamber. The first piston is arranged to move in a reciprocating manner relative to the fuel injector. | 05-05-2011 |
| 20110132333 | INTERNAL COMBUSTION ENGINE WITH WORKING, PISTON AND CONTROL PISTON - The invention relates to an internal combustion engine comprising two opposed pistons sharing the same cylinder (FIG. | 06-09-2011 |
| 20110146629 | INTERNAL PRESSURE DRIVEN ENGINE - An internal combustion engine or other internal pressure driven engine of the type capable of converting reciprocal linear powered motion into unidirectional rotary motion, the engine having at least one pair of first and second cylinders with each cylinder having a pair of opposed pistons therein forming a pressure chamber therebetween. Outer ends of each piston carries a piston rod connected to a pivot arm of a respective one way clutch which causes the clutch to oscillate back and forth when the piston moves in and out due to pressure or combustion in the pressure chamber. Alternatively, the piston rods may be configured as gear racks in direct operative engagement with pinion gears of the one way clutches. The clutches are parallel and spaced apart from each other near each end of the cylinders. Each clutch carries a gear on one end which intermeshes with a gear rack assembly having gears and a gear rack which drives a crankshaft and auxiliary flywheel operatively connected to a starter. Once the starter is turned on the kinetic energy of the flywheel and gear rack keeps the on/off clutches in continuous oscillation. The oscillating clutches turn unidirectional drive shafts connected through pinion gears to a main output shaft and main flywheel. | 06-23-2011 |
| 20110186017 | Single-crankshaft, opposed-piston engine constructions - Ported engines with opposed pistons are coupled to a single crankshaft through rocker arm linkages. Each pair of opposed pistons is coupled to a single crankpin of the crankshaft. Each piston is coupled to a respective rocker arm linkage by a rolling thrust bearing which prevents linkage movement that is transverse to the axis of the piston from being transferred to the piston. Each piston of a pair of opposed pistons is coupled to the same crankpin by respective rocker arm linkages in which connecting rods run between the crankpin and respective rocker arms. One connecting rod is connected to first rocker arm below the rocker arm's pivot point and another connecting rod is connected to a second rocker arm above the rocker arm's pivot point. | 08-04-2011 |
| 20110259304 | FUEL INJECTION SYSTEM - An engine includes a fuel injector support element to support a fuel injector and define a first opening through which the fuel injector can inject fuel. A first piston defines a substantially cylindrical inner chamber and a portal into the substantially cylindrical inner chamber. One or more second pistons are arranged to reciprocate inside the substantially cylindrical inner chamber and to define, in cooperation with the substantially cylindrical inner chamber, a combustion chamber. The first fuel injector support element and the first piston are arranged such that, during engine operation, the first piston reciprocates relative to the first fuel injector support element to thereby cause the first opening and the first portal to move in and out of alignment with one another. | 10-27-2011 |
| 20120031379 | Horizontally Opposed Center Fired Engine - The horizontally opposed center fired engine improves on the traditional design of the horizontally opposed engines and center fired engines with a better engine geometry. The present invention utilizes four pairs of opposing pistons to compress a larger volume of air-fuel mixture within four different cylinders. The four different cylinders are radially positioned around a center axle in order to achieve a perfectly symmetric engine geometry. The center axle consists of two different shafts spinning in two different directions, which could drastically reduce engine vibrations in the present invention. Engine vibrations are caused by a change in engine speed and result in a loss of energy. Due to the design, the present invention will only experience energy loss in the form of entropy and friction. Thus, the present invention can convert a higher percentage of chemical energy into mechanical energy than any other internal combustion engine. | 02-09-2012 |
| 20120037129 | OPPOSED PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 02-16-2012 |
| 20120037130 | Opposed-piston engine having a single crankshaft coupled to the opposed pistons by linkages with pivoted rocker arms - An opposed-piston engine with a single crankshaft has a rocker-type linkage coupling the crankshaft to the pistons that utilizes a rotatable pivot rocker arm with full-contact plain bearings. A rocker-type linkage utilizes a rotatable pivot bearing with an eccentric aspect to vary translation of piston linkage along the axial direction of a cylinder, which shifts the top dead center (TDC) and bottom dead center (BDC) locations of a piston so as to change the volume of charge air compressed during the power stroke. | 02-16-2012 |
| 20120055451 | Inwardly Opposed Pistons, Fixed Position Common Cylinder Engine with External Induction - An engine with a design for an inwardly opposed-piston, 4 cycle engine with a common, fixed cylinder and external induction system. The present invention features include a fixed, common cylinder in which 2 pistons move towards each other during the cycling of the engine, external, modular, fix mounted induction and exhaust system, multiple power take off shafts as well as additional cylinder/piston bank modularity. The production of such design provides for increased thermal, mechanical and volumetric efficiency as it relates to similar internal combustion engines. | 03-08-2012 |
| 20120186561 | Oil retention in the bore/piston interfaces of ported cylinders in opposed-piston engines - An opposed piston engine includes at least one cylinder with a bore surface and longitudinally-spaced exhaust and intake ports that open through the sidewall of the cylinder. A pair of opposed pistons is disposed in the cylinder for sliding movement along the bore surface. An oil-retaining surface texture pattern in an interface between the pistons and the bore surface extends in a longitudinal direction of the cylinder, aligned with bridges of at least one port. The surface texture pattern includes a plurality of separate recesses on an outside surface of a skirt of each piston. Alternatively, or in addition, the surface texture pattern includes a plurality of separate recesses extending in a longitudinal direction of the cylinder, aligned with bridges of at least one port. | 07-26-2012 |
| 20120192838 | BALANCED FIVE STROKE, FIVE CYLINDER BARREL CAM TYPE INTERNAL COMBUSTION ENGINE - A balanced five-stroke cycle, five cylinder engine, wherein the five cylinders are parallel and arranged around a shaft mounted in a centrally disposed bore in the engine block, wherein the shaft is parallel to the cylinders, wherein power pistons in the cylinders dwell motionless for the intake part of the cycle between the vacuum stroke and the compression stroke of each power piston; induction of the combustion mixture resulting from the partial vacuum created by the vacuum stroke of the power piston, and wherein the position of each power piston is governed by a power piston cam mounted on the shaft, the shaft and bore on the centroidal axis of symmetry of the radially spaced apart array of five cylinders corresponding to the pistons, the opening and closing of exhaust ports governed by an exhaust piston cam mounted on the shaft moving exhaust pistons along the cylinders. | 08-02-2012 |
| 20120279479 | Heat Recycling Internal Combustion Enines - This patent describes two engine designs capable of recycling waste heat. The engines are both theoretically capable of approaching 100% efficiency in converting fuel to motion, although they use the same thermodynamic cycle as much lower efficiency 4 stroke engines. | 11-08-2012 |
| 20120285422 | Dual crankshaft, opposed-opposed-piston engine constructions - A dual-crankshaft, opposed-piston, internal combustion engine includes one or more ported cylinders. Each cylinder has exhaust and intake ports, and the cylinders are juxtaposed and oriented with exhaust and intake ports mutually aligned. The crankshafts are rotatably mounted at respective exhaust and intake ends of the cylinders and are coupled by a multi-gear train. A pair of pistons is disposed for opposed sliding movement in the bore of each cylinder. All of the pistons controlling the exhaust ports are coupled by connecting rods to the crankshaft mounted near at the exhaust ends of the cylinders, and all of the pistons controlling the intake ports are coupled by connecting rods to the crankshaft mounted near at the intake ends of the cylinders. The crankshafts are connected by a timing belt operative to change the rotational timing between the crankshafts. The gear train support structure is stiffened to suppress gear train vibration. | 11-15-2012 |
| 20120298077 | OPPOSED PISTON ENGINE WITH GAS EXCHANGE CONTROL BY MEANS OF HYDROSTATICALLY MOVED SLIDING SLEEVES - An opposed piston engine with gas exchange control using sliding sleeves embodied on their outer periphery as differential pistons that can be operated as slave pistons. A plunger that is displaceable by a cam is used as a master piston. A hydraulic liquid is housed between the master piston and the slave piston in a closed pipe system. The liquid column housed between the master piston and the slave piston can be displaced back and forth by hydrostatic pressure build-up enabling the gas exchange elements to be opened and closed by the sliding sleeves. | 11-29-2012 |
| 20130112175 | Constructions for Piston Thermal Management - A piston construction with an end surface is equipped with a pattern of insulating cavities embedded in an upper end of the piston, between the end surface and interior portions of the piston that are cooled by circulating liquid coolant. | 05-09-2013 |
| 20130199503 | Opposed-piston cylinder bore constructions with solid lubrication in the top ring reversal zones - A cylinder for an opposed-piston engine is equipped with a cylinder bore that provides solid lubrication of bore/piston surface interfaces in top ring reversal zones of the cylinder bore. | 08-08-2013 |
| 20130206113 | METHOD AND MEANS FOR CONTROLLING COMBUSTION - A method of charging an internal combustion engine with a fuel air mixture, the engine having opposed pistons with a combustion chamber therebetween, wherein the method includes forcing induction air during a compression stroke between a first and a second cylinder via a contraction and expansion or a venturi disposed between the first and second pistons. | 08-15-2013 |
| 20130276761 | VARIABLE-COMPRESSION ENGINE ASSEMBLY - Variable-compression engine assemblies with an internal combustion device and a flywheel are presented herein. An engine assembly is disclosed which includes an output shaft and a flywheel, which includes a variable cam surface and is slidably mounted onto the output shaft and rotatable about a flywheel axis. Also included is an internal combustion device with a piston that is movable along a central axis in a cycle between refracted and extended positions. The piston engages the variable cam surface, and the central axis of the piston is spaced from the flywheel axis. The cycle includes a power stroke when the piston moves from the retracted position to the extended position whereby the piston presses against the variable cam surface and thereby rotates the flywheel, and a compression stroke when the piston moves from the extended position to the retracted position responsive to the variable cam surface. | 10-24-2013 |
| 20130276762 | Symmetric Opposed-Piston, Opposed-Cylinder Engine - An opposed-piston, opposed-cylinder engine is disclosed that has the pistons symmetrically arranged in the opposed cylinders. In one embodiment, the inner pistons are exhaust pistons and the outer pistons are intake pistons. Alternatively, the inner pistons are intake pistons and the outer pistons are exhaust pistons. The pistons are coupled to the crankshaft that is situated between the opposed cylinders. Central axes of the two cylinders are offset by a predetermined distance. The connecting rods that couple between the crankshaft and the pistons are arranged adjacent to each other on journals of the crankshaft. The journal to which the pushrods couple is not a split-pin type. Instead, it is one that has a common central axis. Furthermore, the crankshaft is a one-piece or unitary structure. | 10-24-2013 |
| 20140026864 | Cylinder and Piston Assemblies for Opposed Piston Engines - Integrated, multi-cylinder opposed engine constructions include a unitary support structure to which cylinder liners are removeably mounted and sealed and on which crankshafts are rotatably supported. The engine constructions include a cooled piston with a resiliently deformable joint connecting crown and skirt and a cooled cylinder liner with wipers to manage lubricant in the cylindrical interstice between the cylinder bore and the piston skirts. | 01-30-2014 |
| 20140083396 | Combustion Chamber Constructions for Opposed-Piston Engines - An opposed-piston engine includes a ported cylinder and a pair of pistons disposed to reciprocate in the bore of the cylinder. A combustion chamber is defined by opposing shaped piston end surfaces as the pistons approach respective top dead center (TDC) locations in the bore. At the end of scavenging, the shaped end surfaces of the pistons interact with swirl to produce turbulence in the charge air motion in the combustion chamber; the additional bulk motions include tumble. Fuel is injected into the turbulent charge air motion along a major axis, of the combustion chamber. | 03-27-2014 |
| 20140090625 | Piston Thermal Management in an Opposed-Piston Engine - An opposed-piston engine includes pistons, each piston having an annular cavity in the piston's sidewall and positioned between its crown and ring grooves to block transfer of heat from the crown to the piston body. | 04-03-2014 |
| 20140102418 | OPPOSED PISTON ENGINE WITH NON-COLLINEAR AXES OF TRANSLATION - An opposed piston internal combustion engine can include two opposed pistons ( | 04-17-2014 |
| 20140109877 | Integrated Piston and Bridge - A piston coupled to a crankshaft via pullrods presents challenges for coupling the piston to the crankshaft because the connections are provided outside the piston. A bridge is coupled to a piston skirt at the end of the piston away from the piston crown. The bridge structure includes: a central support structure, a first projection extending outwardly from the central support structure in a first radial direction, and a second projection extending outwardly from the central support structure in a second radial direction. The central support structure is substantially hollow with a series of internal braces to yield a lightweight piston. | 04-24-2014 |
| 20140130780 | INTERNAL COMBUSTION ENGINE - The invention relates to an engine ( | 05-15-2014 |
| 20140196693 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder) and a crankshaft disposed at one end of the cylinder. Within each cylinder there is a pair of opposed, reciprocating pistons that form a combustion chamber ( | 07-17-2014 |
| 20140299109 | Dual Crankshaft, Opposed-Piston Engines With Variable Crank Phasing - The timing or phasing of port openings and closings during operation of an opposed-piston engine is varied in response to changing engine speeds and loads by changing crankshaft phasing. | 10-09-2014 |
| 20150013649 | Combustion Chamber Constructions For Opposed-Piston Engines - A combustion chamber for an opposed-piston engine includes a squish zone defined between circumferential peripheral areas of opposing end surfaces of the pistons, a cavity defined by one or more bowls in the end surfaces, and at least one injection port that extends radially through the squish zone into the cavity. The cavity has a cross-sectional shape that imposes a tumbling motion on air flowing from the squish zone into the cavity. | 01-15-2015 |
| 20150027418 | INTERNAL COMBUSTION ENGINES - An internal combustion engine comprising at least one cylinder and a pair of opposed, reciprocating pistons within the cylinder forming a combustion chamber therebetween. The engine has at least one combustion igniter associated with the cylinder, a portion of the combustion igniter being exposed within the combustion chamber formed between the opposed pistons. | 01-29-2015 |
| 20150114358 | Master and Slave Pullrods - Master and slave pullrods are disclosed in which a master pullrod is coupled to a journal of a crankshaft. The slave pullrod indirectly couples to the crankshaft by coupling to the master pullrod. Such a configuration allows two connecting rods to be coupled to the journal of the crankshaft inline with each other. | 04-30-2015 |
| 20150122227 | Combustion Chamber Construction with Dual Mixing Regions for Opposed-Piston Engines - A combustion chamber construction for opposed-piston engines in which fuel is injected from two opposed injectors includes a dual mixing region construction with a respective mixing region for each injector and a coupling region between the two mixing regions through which the mixing regions communicate. In some aspects, the mixing regions are bulbous and are connected by a waist, or tunnel, region that is relatively narrower than the bulbous mixing chambers. | 05-07-2015 |
| 20160047296 | Mechanism For Varying Crankshaft Timing On A Belt/Chain Driven, Dual Crankshaft Opposed-Piston Engine - A mechanism for varying crankshaft timing on a belt/chain driven, dual crankshaft opposed-piston engine includes sprockets on corresponding ends of the two crankshafts, connected by a belt or chain which is tensioned by two or more tensioners. By changing the position of the tensioners the length of the two spans of the belt/chain are varied and thus the phase between the crankshafts is varied. | 02-18-2016 |
| 20160053674 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 02-25-2016 |
| 20160061106 | CRANKSHAFT FOR AN INTERNAL COMBUSTION ENGINE - An internal combustion engine includes a crankshaft having a first web portion defining an inner opening and defining an undercut proximate the inner opening, a second web portion defining an inner opening and defining an undercut proximate the inner opening and an inner bearing portion that engages with the inner opening of the first web portion and with the inner opening of the second web portion. First and second pushrods each have a piston end and a crankshaft end. The crankshaft ends of the first and second pushrods each have a concave surface placed over different portions of the inner bearing portion between the first and second web portions, and each further have shoulders adjacent their respective concave surface that engage with the undercuts of the first and second web portions. | 03-03-2016 |
| 20160146164 | DEVICE FOR ADMITTING INLET GASES AND/OR RECIRCULATED EXHAUST GASES INTO AN INTERNAL COMBUSTION ENGINE CYLINDER - The invention relates to a device for admitting inlet gases and/or recirculated exhaust gases into an internal combustion engine cylinder, the device comprising a duct designed to supply said cylinder with inlet gases and/or with recirculated exhaust gases, characterized in that said device further comprises, in the duct, a flow control means that can be operated between a first position in which said duct supplies the cylinder with the inlet gases and a second position in which said duct supplies the cylinder with the recirculated exhaust gases. It also relates to the intake module and to the engine equipped therewith. | 05-26-2016 |
| 20160252012 | INTERNAL COMBUSTION ENGINES | 09-01-2016 |
| 20160252013 | Piston Crown and Corresponding Port Geometry | 09-01-2016 |
| 20160252044 | Engine Block Construction For Opposed Piston Engine | 09-01-2016 |
| 20160252065 | Opposed Piston Three Nozzle Combustion Chamber Design | 09-01-2016 |
| 20160252066 | Fuel Injector with Offset Nozzle Angle | 09-01-2016 |
| 20160252067 | Opposed Piston Three Nozzle Piston Bowl Design | 09-01-2016 |
| 20100071670 | Opposed piston, compression ignition engine with single-side mounted crankshafts and crossheads - In an opposed piston, compression ignition engine two crankshafts are single-side mounted with respect to a row of cylinders, which is to say that the crankshafts are mounted so that their axes of rotation lie in a plane that is spaced apart from and parallel to a plane in which the axes of the cylinders lie. Each piston of the engine is coupled to one of the crankshafts by a single linkage guided by a crosshead. The piston has a piston rod affixed at one end to the piston. The other end of the piston rod is affixed to the crosshead pin. One end of a connecting rod swings on the pin and the other end is coupled to a throw on a crankshaft. Each crosshead is constrained to reciprocate between fixed guides, in alignment with the piston rod to which it is coupled. | 03-25-2010 |
| 20120118272 | AXIAL-PISTON ENGINE, METHOD FOR OPERATING AN AXIAL-PISTON ENGINE, AND METHOD FOR PRODUCING A HEAT EXCHANGER OF AN AXIAL-PISTON MOTOR - The aim of the invention is to improve the efficiency of an axial-piston motor. To this end, the axial-piston motor comprises at least one compressor cylinder, at least one working cylinder and at least one pressure line guiding the compressed fuel from the compressor cylinder to the working cylinder. A working piston comprising a working rod is provided in the working cylinder, and a compressor piston comprising a compressor rod is provided in the compressor cylinder. The axial-piston motor is characterized in that it at least one of the two rods comprises transverse stiffeners. | 05-17-2012 |
| 20080223342 | Two-Stroke Engine with Variable Compression - The invention consists of a two-stroke opposing cylinder engine that includes a length flushing system and two crankshafts ( | 09-18-2008 |
| 20080271715 | Internal combustion barrel engine - A two-stroke barrel engine includes a power output shaft configured to rotate, an even number of cylinders encircling the power output shaft, wherein each cylinder includes opposing first and second power pistons configured to reciprocate within their respective power cylinder, and a pair of non-rotating wobbleplates opposed and hingedly connected to the power pistons. The wobbleplates are configured to transfer the reciprocating motion of the power pistons to rotary motion of the power output shaft via a nutating motion of the non-rotating wobbleplate. | 11-06-2008 |
| 20100186723 | TWO-CYCLE, OPPOSED-PISTON INTERNAL COMBUSTION ENGINE - In a two-stroke, opposed-piston internal combustion engine with optimized cooling and no engine block, opposed pistons protrude from the bore during at least a portion of an operating cycle of the engine and are cooled by application of a liquid coolant to their interiors. | 07-29-2010 |
| 20120125298 | Two stroke opposed-piston engines with compression release for engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with a decompression port including a valve and a passage with an opening through the cylinder wall that is located between the cylinder's intake and exhaust ports. The decompression port enables release of compressed air from the cylinder after the intake and exhaust ports are closed. The valve is opened to permit compressed air to be released from the cylinder through the passage, and closed to retain compressed air in the cylinder. Engine braking is supported by release of compressed air through the decompression port into an exhaust channel when the pistons are at or near top dead center positions as the cycle transitions from the intake/compression stroke to the power/exhaust stroke. Compression release from the cylinder after intake and exhaust port closure can also support other engine operations. | 05-24-2012 |
| 20120210985 | Two stroke, opposed-piston engines with engine braking - In a two-stroke opposed-piston engine, a ported cylinder with a pair of opposed pistons is equipped with an engine brake including an engine braking valve that can be opened to release air from the cylinder as the pistons cycle between BDC and TDC positions. | 08-23-2012 |
| 20140238360 | Rocking Journal Bearings for Two-Stroke Cycle Engines - A rocking journal bearing for a two-stroke cycle engine includes a bearing sleeve having a bearing surface with a plurality of axially-spaced, eccentrically-disposed surface segments and a rocking journal having a plurality of axially-spaced, eccentrically-disposed journal segments. The rocking journal is retained for rocking oscillation on the bearing surface. Space for receiving oil is provided in the rocking journal and oil delivery outlets acting through the journal segments deliver received oil to the bearing surfaces. | 08-28-2014 |
| 20140373814 | Air Handling Control for Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 12-25-2014 |
| 20140373815 | Trapped Burned Gas Fraction Control for Opposed-Piston Engines with Uniflow Scavenging - A trapped burned gas fraction is controlled in a two-stroke cycle opposed-piston engine with uniflow scavenging by adjusting an external EGR setpoint in real time. The adjusted setpoint is used to control EGR flow in the engine's air handling system. | 12-25-2014 |
| 20140373816 | System and Method for Air Handling Control in Opposed-Piston Engines with Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, repeatable trapped mass and composition are achieved by determining provision of air handling setpoints that control operation of the engine's air handling system components. In some aspects, these setpoints govern operations of the air handling system by actively controlling the intake manifold pressure (IMP), EGR flow, and exhaust channel backpressure. | 12-25-2014 |
| 20160025002 | IMPROVED OPPOSED PISTON ENGINE - The invention relates to an opposed piston engine comprising at least one cylinder, at least two pistons arranged to be reciprocated within the same cylinder in an opposed manner, at least one intake port through the cylinder wall, at least one exhaust port through the cylinder wall, at least one shaft arranged to be rotated by reciprocal motion of the opposed pistons, at least one reciprocatable sleeve valve within the cylinder for controlling porting of one or both of the at least one intake port and the at least one exhaust port, a sleeve valve driving mechanism for controlling reciprocal motion of the at least one sleeve valve, and a dwell mechanism. The dwell mechanism is configured to induce at least one period of dwell of the at least two pistons during their respective cycles of piston motion. | 01-28-2016 |
| 20160032822 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis, a first inlet port, and a first exhaust port. First pistons are slidably disposed within the first cylinder and are movable toward one another and away from one another. The engine additionally includes a second cylinder having a second longitudinal axis, a second inlet port, and a second exhaust port. The second cylinder is disposed adjacent to the first cylinder with the second inlet port being aligned with the first exhaust port in a first direction extending substantially perpendicular to the first longitudinal axis and the second longitudinal axis, and the second exhaust port being aligned with the first inlet port in the first direction. Second pistons are slidably disposed within the second cylinder and are movable toward one and away from one another. | 02-04-2016 |
| 20160032823 | CYLINDER ARRANGEMENT FOR OPPOSED PISTON TWO-STROKE ENGINE - An opposed-piston, two-stroke engine is provided and includes a first cylinder having a first longitudinal axis and a first pair of pistons slidably disposed within the first cylinder and movable toward one another in a first mode of operation and away from one another in a second mode of operation. The engine additionally includes a second cylinder having a second longitudinal axis and a second pair of pistons slidably disposed within the second cylinder and movable toward one another in the first mode of operation and away from one another in the second mode of operation. A crankshaft is connected to at least one of the first pair of pistons and at least one of the second pair of pistons and has an axis of rotation. The axis of rotation is disposed between and is substantially perpendicular to the first longitudinal axis and the second longitudinal axis. | 02-04-2016 |
| 20160069293 | OPPOSED PISTON TWO-STROKE ENGINE WITH THERMAL BARRIER - In one configuration, the present disclosure provides a cylinder including a first housing, a second housing, and an insert. The first housing includes a first body portion and a first collar portion. The first body portion has a first inner diameter, and the first collar portion has a second inner diameter that is greater than the first inner diameter. The second housing includes a second body portion and a second collar portion. The second body portion has a third inner diameter and the second collar portion has a fourth inner diameter that is greater than the third inner diameter. The second housing is coupled to the first housing such that the first and second collared portions cooperate to form an annular channel. The insert is disposed within the annular channel formed by the first and second collared portions. | 03-10-2016 |
| 20160076468 | Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging - In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system. | 03-17-2016 |
| 20160252004 | HYBRID OPPOSED-PISTON ENGINE SYSTEM | 09-01-2016 |
| 20100282219 | MONOBLOCK VALVELESS OPPOSING PISTON INTERNAL COMBUSTION ENGINE - The present invention provides an internal combustion engine that provides advantages of both typical 2-stroke engines and typical 4-stroke engines, but using a new design unlike either. The present engine provides for use of pistons as means for opening and closing intake and exhaust ports disposed on cylinder walls. It also provides two pistons per cylinder in an opposing configuration, such that one fuel explosion event causes motion of both pistons per cylinder, in opposite directions. Each piston of a cylinder is connected to a separate crankshaft, which completes a single revolution about its axis per fuel explosion event in a cylinder. In a single cycle of piston movement along the cylinder, a full cycle of ignition, exhaust, intake, and compression is achieved. | 11-11-2010 |
| 20130239930 | DUAL CRANKSHAFT ENGINE - A dual-crankshaft engine is presented. In one embodiment, the engine includes a first crankshaft and a second crankshaft. The second crankshaft is coupled with the first crankshaft such that the first crankshaft and the second crankshaft are horizontally coplanar. The engine further includes a first piston that is operable to reciprocate in a first horizontal cylinder via coupling with the first crankshaft, and a second piston that is operable to reciprocate in a second horizontal cylinder via coupling with the second crankshaft. The second horizontal cylinder is horizontally collinear with and opposing the first horizontal cylinder. | 09-19-2013 |
| 20140261338 | In-Line Six Internal Combustion Engine - One non-limiting object of the present invention is to provide modifications to conventional in line 6 cylinder engines capable of increasing their efficiency in operation. This includes modifying the central two adjacent piston and cylinder assemblies of the engines. The modifications involve (1) changing the camshaft so that the central two adjacent piston and cylinder assemblies have their four stroke cycles in phase rather than 180° out of phase, (2) providing a communicating passage between the combustion chambers of the central two piston and cylinder assemblies and (3) modifying either the hardware or programming for the control of the fuel injectors of the central two piston and cylinder assemblies so that they can be selectively controlled not to inject fuel during the operation cycle thereof. The modifications contemplates providing a new cam shaft in which not only the cams relating to the central two adjacent piston and cylinder assemblies are modified to change 180° out of phase to in phase, but the cams relating to other piston and cylinder assemblies in order to provide a somewhat balanced application of the driving forces during each cycle. | 09-18-2014 |
| 20130220281 | METHOD, ENGINE CYLINDER, AND ENGINE WITH OPPOSED SEMI-LOOP SCAVENGING - A method for the reverse scavenging of an engine cylinder and for the introduction of fresh gas into the cylinder and for the discharge of exhaust gas out of the cylinder. The cylinder has oppositely disposed and opposingly driven pistons. In the region of the respective bottom dead center (BDC) of the two pistons, there are formed in the cylinder wall in each case one outlet region for the exhaust gas and in each case one, in particular circumferentially opposite flow transfer region for pre-compressed fresh gas which has been admitted from the crankcase. The fresh gas supplied through the respective flow transfer region is expelled in the direction of the wall region which is situated on that side of the cylinder inner wall and which adjoins the flow transfer region in the cylinder longitudinal direction. | 08-29-2013 |
| 20090165754 | Two-stroke Opposed Cylinder Internal Combustion Engine with Integrated Positive Displacement Supercharger and Regenerator. - A two-stroke internal combustion engine ( | 07-02-2009 |
| 20100192923 | INTERNAL COMBUSTION ENGINES - The invention provides a 2-stroke internal combustion engine comprising two opposed cylinders, each cylinder housing two opposed pistons and having at least one exhaust port and at least one intake port, and a crankshaft having asymmetrically arranged journals and scotch-yoke mechanisms for driving the journals from the pistons. The pistons in each cylinder operate to open its exhaust port or ports before its intake port or ports and to close its exhaust port or ports before its intake port or ports. | 08-05-2010 |
| 20120204841 | Opposed-Piston, Opposed-Cylinder Engine With Collinear Cylinders - An opposed-piston, opposed-cylinder OPOC engine is disclosed in which the central axis of the two cylinders is collinear. In four-stroke engines, this is possible with a built up crankshaft. Disclosed are connecting rod configurations that are suitable for a two-stroke engine that can be assembled to a unitary crankshaft, including both pullrods in tension and pushrods in compression. The configuration includes pistons arranged symmetrically, but with offset timing of the intake and exhaust pistons. The offset timing leads to a slight imbalance which can partially overcome by having the center of gravity of the crankshaft offset from the axis of rotation. | 08-16-2012 |
| 20130133627 | RECIPROCATING PISTON ENGINE - A single-crankshaft single-cylinder fully-balanced opposed piston engine module that provides extra time for the injection and the combustion of the fuel. | 05-30-2013 |
| 20160090900 | Multi-Cylinder Opposed Stepped Piston Engine - With reference to FIG. | 03-31-2016 |
