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| Number | Title | Issue Date |
| 7856952 | Variable compression engine with variable inlet valve timing An apparatus for providing two features that improve fuel economy of four stroke internal combustion engines. The first is the provision of a compression ratio which is higher than normal when the engine is operating at light load; and which varies from very high at... | 12/28/2010 |
| 7438025 | Ultra-expansion four-stroke internal combustion engine An ultra-expansion four-stroke internal combustion engine, includes a cylinder and a piston, wherein the compression degree of the admission space that satisfies the power requirement is maintained at 1.8-5 Mpa at the end of compression stroke to form the condition ... | 10/21/2008 |
| 7430995 | Constant optimum total compression: real-time manipulation of combustion chamber volume as a means of optimizing compression in internal combustion engines In conventional engines, the compression ratio is a constant. Therefore, cylinder pressure increases proportionately with intake manifold pressure. As manifold pressure changes dramatically according to load, a conventional engine cannot maintain anywhere near const... | 10/07/2008 |
| 7337869 | Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof A vehicle includes an integrated drive module coupled to an axle thereof. The module includes a hydraulic motor configured to provide motive power at an output shaft, and a differential for distributing the motive power to right and left portions of the axle. The hy... | 03/04/2008 |
| 7318397 | High efficiency high power internal combustion engine operating in a high compression conversion exchange cycle A piston (10), a spring (15) operatively coupled to a piston, the spring being inside (21) or outside (41) the piston, and if the spring is inside the piston, the diameter of the spring is equal to 0.7 to 0.9, and if it is outside of the ... | 01/15/2008 |
| 7273022 | Concentric piston for variable compression ratio directly based on the combustion chamber pressure This invention produces a variable compression ratio in internal combustion engines, based on a sliding concentric piston which moves up by an internal spring and down by the different changing pressures over the concentric piston head, within the combustion chamber... | 09/25/2007 |
| 7270092 | Variable displacement/compression engine An internal combustion engine with improved efficiency provides continuous variable displacement and/or compression ratio tuning to one of a number of fuel types to be used by the engine. By varying displacement without changing the compression ratio, the engine can... | 09/18/2007 |
| 7261301 | Oil scraper ring for pistons of internal combustion engines The invention relates to an oil scraper ring for pistons of internal combustion engines, said oil scraper ring comprising a disc (1) provided with a bearing surface (h) having an asymmetrical crowned form with a vertex line (3) extending over the perip... | 08/28/2007 |
| 7167789 | Variable compression ratio internal combustion engine A variable compression ratio internal combustion engine is programmably configured to operate in a plurality of compression ratios. Internal combustion engines with electronically controlled engine components that include electronic valve operation are programmed to... | 01/23/2007 |
| 7134281 | System and method for operating a compression-ignition engine A method of operating a compression-ignition engine includes adjusting timing of fuel injection if a sensed parameter indicative of a maximum pressure within a combustion chamber varies relative to a selected pressure and if fuel injection timing is greater than a p... | 11/14/2006 |
| 7116004 | Method for regulating the operation of a device for generating electric energy by means of a generator driven by a free-piston internal combustion engine The present invention relates to a method for controlling an electrical generator comprising a two-stroke free piston internal combustion engine having a first cylinder and a second cylinder aligned on a common axis, a first piston pair comprising a first piston and... | 10/03/2006 |
| 7107964 | Control of auto-ignition timing for homogeneous combustion jet ignition engines A method and system of controlling auto-ignition timing in an internal combustion engine cylinder in which the timing of auto-ignition in prechambers that are coupled to the cylinder is precisely controlled. The auto-ignition in the prechambers produces hot gas jets... | 09/19/2006 |
| 7100567 | Method to extend lean ignition limit within internal combustion engine A method of operating an internal combustion engine is provided. The engine includes a main combustion chamber in fluid communication with a prechamber. The method comprises the step of varying the volume within the prechamber during a portion of a compression strok... | 09/05/2006 |
| 7076360 | Auto-ignition timing control and calibration method An auto-ignition timing control and calibration method for use in an internal combustion engine having more than one ignition modes including the mode of compression ignition of a premixed fuel/air mixture (CAI/HCCI), wherein when the engine is operating in the CAI/... | 07/11/2006 |
| 7047940 | Control apparatus and control method for internal combustion engine A control apparatus stops supply of a fuel to an engine (a) when a value of a parameter relating to a misfire of the engine satisfies a misfire condition that is set based on an octane value of the fuel, or (b) when it is determined that a misfire may occur if an in... | 05/23/2006 |
| 7043349 | Method and system for inferring exhaust temperature of a variable compression ratio engine A method for operating a variable compression ratio internal combustion engine includes the steps of determining a compression ratio operating state of the engine and inferring an exhaust temperature for the engine based at least in part on the compression ratio ope... | 05/09/2006 |
| 7021275 | Igniter for internal combustion engines operating over a wide range of air fuel ratios An igniter for ignition over a wide air/fuel ratio range. Igniter includes an igniter body including an internal cavity disposed substantially within the igniter body, an internal spark gap disposed substantially within the internal cavity, an external spark gap dis... | 04/04/2006 |
| 6998727 | Methods of operating a parallel hybrid vehicle having an internal combustion engine and a secondary power source The invention is directed toward methods for operating a parallel hybrid vehicle in a manner that responds to the operator's demand for power output, while maximizing engine efficiency and minimizing disruptions in vehicle drivability. According to principles of the... | 02/14/2006 |
| 6952923 | Split-cycle four-stroke engine An engine has a crankshaft, rotating about a crankshaft axis of the engine. An expansion piston is slidably received within an expansion cylinder and operatively connected to the crankshaft such that the expansion piston reciprocates through an expansion stroke and ... | 10/11/2005 |
| 6953020 | Control of auto-ignition timing for combustion in piston engines by prechamber compression ignition A method and system of controlling auto-ignition timing in an internal combustion engine cylinder in which the timing of auto-ignition in prechambers that are coupled to the cylinder is precisely controlled. The auto-ignition in the prechambers is produced by a comp... | 10/11/2005 |
| 6941907 | Homogneous or premixed charge auto-ignition engine A homogeneous or pre-mixed charge auto-ignition engine comprising two interconnected chambers (20, 30) one of which is the combustion chamber (20) and the other (30) containing the power transmitting member (31). Between the two chambers ... | 09/13/2005 |
| 6910454 | Method of and device for operating a multi-cylinder combustion engine with variable compression ratio In a multi-cylinder combustion engine with a variable compression ratio a start of the combustion engine is performed with a compression ratio which is reduced relative to compression ratios in normal operation of the combustion engine. ... | 06/28/2005 |
| 6910459 | HCCI engine with combustion-tailoring chamber An internal combustion engine is adapted for operation with homogeneous combustion and compression ignition. The engine includes plural cylinders with the piston in each cylinder defining the main combustion chamber and connected to a crankshaft for reciprocating mo... | 06/28/2005 |
| 6907849 | Piston A piston (11) incorporates spring means acting, in use, between the piston and an associated connecting rod so as to bias the connecting rod away from the crown (112) of the piston. The spring means (117) is integrally formed with the pistons (111 | 06/21/2005 |
| 6708655 | Variable compression ratio device for internal combustion engine An internal combustion engine, particularly suitable for use in a work machine, is provided with a combustion cylinder, a cylinder head at an end of the combustion cylinder and a primary piston reciprocally disposed within the combustion cylinder. The cylinder head ... | 03/23/2004 |
| 6581551 | Method of controlling the process of combustion in an internal combustion engine, and engine with means for varying the effective compression ratio of the cylinders A four-stroke internal combustion engine includes variable geometric compression ratio, electrically operated inlet valves and a device for supplying a homogeneous fuel/air mixture to the engine cylinders. The inlet valves and the compression ratio are co... | 06/24/2003 |
| 6557503 | Method for lowering fuel consumption and nitrogen oxide emissions in two-stroke diesel engines A method of lowering fuel consumption and NOx levels in a two-stroke diesel engine having at least one piston disposed in at least one combustion chamber comprises the steps of providing a compression ratio within the combustion chamber between... | 05/06/2003 |
| 6450154 | Method for creating a homogeneous fuel charge in the combustion chamber through the use of ultrasound spray breakup An engine particularly suitable for homogeneous charge compression ignition operation. A piezoelectric oscillator is provided in a combustion chamber of the engine and initiates ultrasonic pressure waves to promote the breakup of fuel droplets. The piezoe... | 09/17/2002 |
| 6427643 | Internal combustion engine with variable compression ratio A lean burn auto-ignition internal combustion engine which has a combustion volume which includes two parts one entering into the other, the volume of the second part being variable by control means (34) which takes into account the various operating para... | 08/06/2002 |
| 6354250 | Internal combustion engine An internal combustion engine having at least one cylinder and a power piston reciprocatably moving within the cylinder, wherein the cylinder stationary head of a conventional engine is replaced by a control piston interrelated to the power piston to defi... | 03/12/2002 |
| 6318308 | Increased compression ratio diesel engine assembly for retarded fuel injection timing A diesel engine adapted for operation under retarded fuel ignition timing relative to conventional fuel injection timing includes a piston shaped to increase the compression ratio of an engine cylinder, and specially designed combustion air intake and exh... | 11/20/2001 |
| 6302067 | Internal combustion engine The present invention relates to an unthrottled internal combustion engine of segregating, spark ignited, form, i.e. in which the bulk of the fuel does not begin to mix with the bulk of the air until near the end of the compression stroke, shortly before ... | 10/16/2001 |
| 5878701 | Cylinder head for an internal combustion engine and method of adjustably establishing the volume of a combustion chamber therein A cylinder head has a head portion for attachment to an engine cylinder of an internal combustion engine, and a combustion chamber dome is adjustably received in a central aperture of the head portion. External circumscribed threads on the combustion cham... | 03/09/1999 |
| 5611300 | Floating piston, piston-valve engine The present invention is an improved drive train which includes an engine having at least one power cylinder with a power piston mounted for reciprocating motion therein. The power piston is connected to a crank shaft in the usual manner for translation o... | 03/18/1997 |
| 5427063 | Variable compression ratio cylinder An internal combustion engine having at least one volume adjustable cylinder which automatically adjusts its compression ratio during operation. The volume adjustable cylinder includes a movable head insert placed inside the insert space formed on the eng... | 06/27/1995 |
| 5195469 | Controlled variable compression ratio internal combustion engine An improved arrangement for controlling and adjusting the compression ratio of an internal combustion engine (10) during operation. A secondary cylinder (201) is formed in the engine cylinder head (102) and opens upon the combustion chamber (110) of the e... | 03/23/1993 |
| 5188066 | Internal combustion engine The present invention relates to an arrangement for an internal combustion engine. The engine is of the kind which has a number of working cylinders (1, 2, 3, 4), each of which communicating with a corresponding auxiliary cylinder (5, 6, 7, 8). Each worki... | 02/23/1993 |
| 5186137 | Rocking-piston machine A reciprocating rocking-piston two-cycle engine where the piston is skirtless, rigidly mounted to its connecting rod, and slides up and down in a preferably waisted cylinder is shown and described. The free and of the connecting rod is laid out as an adju... | 02/16/1993 |
| 5007384 | L-head two stroke engines An L-head two stroke engine comprises two pistons mounted for reciprocable movement in first and second cylinders respectively. The cranks of the two pistons are drivably connected such that the pistons are in phase. A fuel/air supply is provided for one ... | 04/16/1991 |
| 4905635 | Valve gear for internal combustion engine The present inventio relates to a valve gear for an internal combustion engine. The internal combustion engine has one or more cylinders and a piston reciprocating therein as well as a cylinder head mounted on an upper end of the cylinder. At least one ex... | 03/06/1990 |
