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| Number | Title | Issue Date |
| 7380525 | Method of operating an internal combustion engine A method is disclosed for operating an internal combustion engine of the type having an engine cylinder with a reciprocating piston, first and second intake ports for admitting gas from an ambient air supply into the engine cylinder, first and second intake valves e... | 06/03/2008 |
| 7194987 | Internal combustion engine driven with change-over of compression ratio, air-fuel ratio, and boost status With an increase in torque demand, the internal combustion engine of the invention successively changes over a combination of a compression ratio, an air-fuel ratio, and a boost status of an air-fuel mixture from (1) settings of a high compression ratio, a lean air-... | 03/27/2007 |
| 7191756 | System and method for controling crankshaft position during engine shutdown using cylinder pressure Systems and methods for controlling stopping position of a crankshaft during shutdown of a multiple cylinder internal combustion engine influence cylinder pressure independent of associated intake/exhaust valves during shutdown of the engine so the crankshaft stops ... | 03/20/2007 |
| 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 |
| 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 |
| 7059280 | Variable compression ratio system for internal combustion engine and method for controlling the system A variable compression ratio system for an internal combustion engine, including a variable compression ratio mechanism for continuously varying a compression ratio of the engine, the variable compression ratio mechanism including a control shaft rotatably moveable ... | 06/13/2006 |
| 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 |
| 7017533 | Almost zero combustion chamber An internal combustion reciprocation engine conjoined and integrated with a supplementary piston mechanism. The supplementary piston mechanism serves as a storage and return volume for fresh gases to be ignited during the power stroke. Thus, erasing the need for a c... | 03/28/2006 |
| 6970781 | Compression ratio mode selection logic for an internal combustion engine having discrete variable compression ratio control mechanism A method and system for operating an internal combustion engine. The internal combustion engine is operable in a plurality of compression ratio operating modes. The method includes determining a relationship between a base engine threshold load where the high compre... | 11/29/2005 |
| 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 |
| 6942472 | Head pressure relief assembly A head pressure relief assembly for relieving pressure in the head assembly of an air compressor may include an exhaust valve post formed in the head assembly and an exhaust valve assembly comprised of a flapper valve. An aperture may be formed through the exhaust v... | 09/13/2005 |
| 6925972 | Internal combustion engine driven with change-over of compression ratio, air-fuel ratio, and boost status With an increase in torque demand, the internal combustion engine of the invention successively changes over a combination of a compression ratio, an air-fuel ratio, and a boost status of an air-fuel mixture from (1) settings of a high compression ratio, a lean air-... | 08/09/2005 |
| 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 |
| 6814032 | Dual fuel engine The present invention aims to allow an arbitrary selection to be made between gas operation and diesel operation, to achieve a reduction in NOx even when in diesel operation, to allow the compression ratio to be adjusted and altered in accordance with the operating ... | 11/09/2004 |
| 6708654 | High efficiency engine with variable compression ratio and charge (VCRC engine) An internal combustion engine using variable compression ratio and variable fuel supply to one of two combustion chambers is presented. Varying the compression ratio is accomplished by changing the volume of a single combustion chamber. This, in combination with lea... | 03/23/2004 |
| 6578533 | Controlled homogeneous-charge, compression-ignition engine An engine has a plurality of combustion cylinders with a first piston reciprocably mounted in each of the combustion cylinders in the conventional manner. The engine head has, in communication with each of the combustion cylinders, a cylindrical recess co... | 06/17/2003 |
| 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 |
| 5960749 | Two-cycle internal combustion engine A control valve is disposed in a communication passage for communication between a combustion chamber and a chamber portion adjacent to the combustion chamber, and through the communication passage at least one of a fuel and an air-fuel mixture, and a hig... | 10/05/1999 |
| 5842453 | Device in a cylinder head for an internal combustion engine The invention relates to a device in a cylinder head for an internal combustion engine, said cylinder head for each cylinder comprising at least one inlet channel with an inlet valve for controlling the communication between the inlet channel and a combus... | 12/01/1998 |
| 5803026 | Internal combustion engine An internal combustion engine has at least one pair of first and second cylinders (12, 14) with the first (12) cylinder having a larger swept volume than the second cylinder (14) and respective first and second pistons (16, 18) reciprocable in the cylinde... | 09/08/1998 |
| 5201907 | Internal combustion engine The engine is provided with an auxiliary chamber having an auxiliary chamber port with an opening communicated with the combustion chamber. The auxiliary chamber port is arranged to be opened or closed with an auxiliary chamber valve. The timing of closin... | 04/13/1993 |
| 5101776 | Engine with variable compression ratio An internal combustion engine is described in which each combustion chamber (10) in the engine has an associated auxiliary chamber (18), and in which, for low compression ratio operation, the auxiliary chamber (18) is constantly connected to the combustio... | 04/07/1992 |
| 4996953 | Two plus two stroke opposed piston heat engine Combustion engines have opposed pistons in one or more cylinders, with the piston motion determined by cams. Ports, for intake and exhaust, are at one end of the cylinder, opened or closed by one piston, with the combustion chamber at the other end, and t... | 03/05/1991 |
| 4940029 | Turbocompounded two-stroke piston engines The cylinder head (401) of a turbocompounded 2-stroke piston engine incorporates, for each cylinder (400), an indirect combustion chamber (402) which is connected to the cylinder clearance volume (413) by a passage (412). The indirect combustion chamber (... | 07/10/1990 |
| 4860711 | Engine with variable compression ratio A variable compression engine has a cylindrical subcompression chamber formed in its cylinder head to communicate with the combustion chamber and having a variable inner volume adjustable by a piston slidably fitted therein and being controllably actuatab... | 08/29/1989 |
| 4787341 | Pressure assist piston for internal combustion engine A controlled pressure combustion chamber for a reciprocating engine. The engine includes a main cylinder and a main reciprocating piston. In the cyliner head is a second cylinder which opens to the first cylinder. A free piston in the second cylinder in s... | 11/29/1988 |
| 4732115 | Interval spark ignition combustion engine A two stroke spark ignition engine requiring a minimum of one pair of cylinders is constructable in multiple cylinder pairs. Each cylinder contains two oppositely working pistons. Four pistons drive, without rocking couples, opposite sides of a single cra... | 03/22/1988 |
| 4715347 | Method and apparatus for pretreatment of fuel by partial combustion with a composite catalyst An apparatus and method for pretreatment of fuel in a combustion device such as an internal combustion engine, in which a fuel is partially combusted by a catalytic reaction to form a high temperature hydrogen-rich product gas, which gas is thereafter dir... | 12/29/1987 |
| 4651703 | Method and apparatus for achieving hypergolic combustion by partial catalytic combustion An apparatus and method for achieving hypergolic combustion, in which a hydrocarbon fuel is partially combusted by a catalytic reaction to form a high temperature hydrogen-rich product gas, which is directly injected into an oxidizing atmosphere in a comb... | 03/24/1987 |
| 4625684 | Internal combustion engine Internal combustion engine comprising at least one cylinder (10), one piston (2) mounted to the crankshaft (2'), and at least one inlet valve and one exhaust valve. At the end of the cylinder (1) corresponding to the top dead center of the piston (2) are ... | 12/02/1986 |
| 4313403 | Internal combustion engine An internal combustion engine is provided having a pair of cylinders interconnected by means of a narrow connecting channel. A working piston reciprocates in one cylinder and is conventionally attached to a crankshaft by means of a connecting rod and cran... | 02/02/1982 |
| 4202300 | Internal combustion engine In an internal combustion engine intended to provide high fuel economy, low noxious emissions and high power, a pair of four cycle power cylinders are alternately fed by a two cycle charge cylinder in which a rich air/fuel mixture is compressed and delive... | 05/13/1980 |
| 4182288 | Mixture-compressing, spark-ignited internal combustion engine having a combined throttle and compression control A mixture-compressing, spark-ignited internal combustion engine has a combined throttle and compression control. The engine has at least one main piston sliding in a main cylinder and driving a crankshaft, and an auxiliary piston sliding in an auxiliary c... | 01/08/1980 |
| 4168678 | Internal combustion engine with auxiliary piston for generating turbulence An internal combustion engine is provided with an auxiliary piston reciprocating within an auxiliary chamber for generating turbulence in a gas mixture contained within a main combustion chamber. Forward motion of the auxiliary piston causes the injection... | 09/25/1979 |
| 3970056 | Variable compression ratio control system for internal combustion engines The internal combustion engine comprises one or more cylinders in which a main piston provides the means to drive a drive shaft, there is a cylinder head over the cylinders. Auxiliary pistons slide in each auxiliary cylinder in the cylinder head and each ... | 07/20/1976 |
| 3938482 | Internal combustion engine with a plurality of exhaust valves An internal combustion engine comprising a first exhaust valve arranged in an exhaust port in the exhaust system of said internal combustion engine, and a second exhaust valve arranged in the exhaust port downstream from said first exhaust valve, the timi... | 02/17/1976 |
