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| Number | Title | Issue Date |
| 8056532 | Direct fuel injection diesel engine In a direct fuel injection diesel engine having a piston with a pentroof-shaped top face, with regard to a pentroof-shaped piston (13) with a cavity (25) recessed in a central part of the top face, a radial width S of a squish area (26) formed b... | 11/15/2011 |
| 7971568 | Piston of gasoline direct injection engine A piston of a gasoline direct engine may include a protuberance portion protruding along a circular arc shape having a radius (R1) equal to the piston diameter to have a predetermined height (T) from the upper surface thereof, and the edge of the protuberance... | 07/05/2011 |
| 7856958 | Piston for internal combustion engine, and internal combustion engine using the piston A piston top surface (23) has a depression. A center region (28A) is formed at the center of the depression to secure the diameter of a center tumble flow to be large. A side region (28B) is formed on both sides of the piston top surface to gene... | 12/28/2010 |
| 7721704 | Device and method to increase fuel burn efficiency in internal combustion engines A reciprocating piston engine wherein the movement of a piston within the combustion chamber creates vortices in the fluid within the chamber and wherein the orientation of the vortices is more normal to the axis of movement of the piston than parallel to the axis o... | 05/25/2010 |
| 7395806 | Reciprocating internal-combustion engine with direct fuel injection by means of an injector arranged on the intake side A reciprocating internal-combustion engine having at least two gas intake ports (3) with gas intake valves (6), at least one gas exhaust port (4) with a gas exhaust valve (7) and at least one ignition device (14) per cylinder (1... | 07/08/2008 |
| 7318406 | Bowl-in-piston of a cylinder in a direct injection engine A piston in a direct injection spark ignition internal combustion engine is configured to reciprocate upward and downward within a combustion chamber along a reciprocating axis. The piston comprises an upper end which partly defines the combustion chamber; a bowl de... | 01/15/2008 |
| 7270109 | Internal combustion engine Enhanced combustibility by increasing the difference in intake gas velocity between a low flow velocity region and first and second high flow velocity regions in an intake port. An intake port of an internal combustion engine has an intake flow control port portion ... | 09/18/2007 |
| 7267116 | Spark plug and ignition apparatus using same A power-saving type of ignition apparatus is provided with a spark plug of which electrodes (30, 40) are regulated in their shapes to lower an amount of energy required for its ignition. To face to a tip (31) of a center electrode (30) extending... | 09/11/2007 |
| 7188589 | Direct injection internal combustion engine In a direct injection internal combustion engine, a fuel injection valve and a spark plug of adjacent cylinders are inclined at different angles from each other in directions perpendicular to a cylinder arrangement direction in which the cylinders are arranged. Besi... | 03/13/2007 |
| 7066115 | Internal combustion engine/hydraulic motor/fluid pump provided with opposite pistons An internal combustion engine has a pair of opposed pistons held within an elliptical guide of the engine housing. The pistons reciprocate within a cylinder attached to a shaft. A combustion chamber is formed within the shaft and positioned to be between the pistons... | 06/27/2006 |
| 7055490 | In-cylinder injection, spark ignited internal combustion engine An in-cylinder injection, spark ignited internal combustion engine including a fuel injection valve spraying fuel substantially in a sector having a relatively small thickness and spreading substantially vertically to implement homogenous combustion and stratified c... | 06/06/2006 |
| 6997158 | Diesel combustion chamber A combustion chamber assembly for use in a diesel engine includes a combustion chamber being defined intersecting a crown of a piston, the combustion chamber being defined by a first curved surface having a reentrancy formed proximate a first curved surface first en... | 02/14/2006 |
| 6745745 | Combustion chamber for reverse tumble spark ignition direct injection engine Superior piston bowl and combustion chamber configurations are designed for a reverse tumble spark ignition direct injection engine. The piston includes a shallow bowl extending from adjacent an edge of the piston head to an inner side slightly beyond a peak. The bo... | 06/08/2004 |
| 6615789 | Piston for internal combustion engines A piston for an internal combustion engine, including a piston crown having a central axis, and a piston bowl disposed in the piston crown, on which two tumble flows of air are provided. The piston bowl has a generally V-shaped contour in section taken al... | 09/09/2003 |
| 6513487 | Method for operating a reciprocating-piston internal combustion engine A method for operating a reciprocating-piston internal combustion engine, having an injector nozzle operable by a single valve element and configured to directly inject a fuel into a combustion chamber and having a piston including a piston crown and a pi... | 02/04/2003 |
| 6047592 | Four-stroke internal combustion engine with spark ignition In order to optimize combustion in a four-stroke spark-ignition engine with direct fuel injection, the conditions of charge flow are improved by providing the top surface of each piston with two longitudinal guiding ribs located at a distance from each ot... | 04/11/2000 |
| 5927244 | Combustion chamber structure having piston cavity An internal combustion engine having a cylinder head body with a pentroof-shaped combustion chamber comprises a piston including a piston cavity and a caldera-shaped protrusion provided around the piston cavity, a fuel injector for injecting fuel downward... | 07/27/1999 |
| 5921215 | Four-stroke internal combustion engine with spark ignition In order to optimize combustion in a four-stroke spark-ignition engine with direct fuel injection, the conditions of charge flow are improved by providing the top surface of each piston with an essentially T-shaped configuration of guiding ribs, i.e., a l... | 07/13/1999 |
| 5873344 | Direct fuel injection ignition engine A direct injection ignition engine includes a piston with a cavity on a top surface thereof, an injector arranged at a peripheral portion of a combustion chamber to be faced to the combustion chamber for injecting a fuel directly into the combustion chamb... | 02/23/1999 |
| 5819700 | Combustion chamber structure for an internal combustion engine To accelerate a combustion within an entire combustion chamber including the vicinity of an opening portion for air suction to thereby make uniform a flame propagation in a combustion chamber structure for an internal combustion engine, and to provide a t... | 10/13/1998 |
| 5727520 | Four-stroke internal combustion engine with spark ignition In order to optimize combustion in a four-stroke spark-ignition engine with direct fuel injection, the conditions of charge flow are improved by providing the top surface of each piston with an essentially U-shaped guiding rib, which is open towards the e... | 03/17/1998 |
| 5622150 | Method for introducing fuel into a combustion chamber of an internal combustion engine In a method for introducing fuel into the combustion chamber of an internal combustion engine wherein compressed gas is drawn from the combustion chamber during the compression phase of a working cycle, mixed with fuel, and injected into the combustion ch... | 04/22/1997 |
| 5517961 | Engine with flow coupled spark discharge An improved spark ignition engine system producing a large continuous, centrally directed, flow coupled ignition spark discharge through combustion chamber (1), piston (4), inlet system (28/29), spark plug (5), and ignition spark discharge (26) design, an... | 05/21/1996 |
| 5009207 | Internal combustion engine An internal combustion engine has a pair of first and second cylinders (12,14) communicating with a combustion chamber (20) the first cylinder having a larger swept volume than the second cylinder. First and second pistons (16,18) are provided in the cyli... | 04/23/1991 |
| 5000136 | Internal combustion engine with rotary valve assembly An internal combustion engine having a head with valve assemblies for controlling intake and exhaust gases to and from piston chambers. A head plate is located between the head and a block having cylinders accommodating pistons. The head plate has opening... | 03/19/1991 |
| 4964379 | Twin-piston two-stroke engine Two pistons in adjacently situated cylinders in a twin-piston two-stroke engine share a common combustion chamber. To ensure low exhaust gas emissions with low consumption, a lean mixture is burnt whereof the complete combustion is made possible by design... | 10/23/1990 |
| 4872433 | Combustion chamber configurations for two cycle engines Improved combustion chamber configurations for two-cycle engines with high pressure fuel injected systems having reciprocal pistons, cylinders with multiple injectors for each cylinder and a cylinder head liner with a chamber having a discoidal configurat... | 10/10/1989 |
| 4712526 | Piston with turbine fan for use in internal combustion engines A new piston design is disclosed for use in internal combustion engines. The invention consists of a piston that has a turbine insert installed inside an internal cavity. The turbine insert has a set of turbine blades mounted under the piston head. The pi... | 12/15/1987 |
| 4622929 | Deflector piston two-stroke engine A deflector piston two stroke internal combustion engine has a piston (10) reciprocable in a cylinder and sealed thereto by means of piston rings (P2), the cylinder having communicating with it a scavenge part SC2) and an exhaust part (E2). The piston cro... | 11/18/1986 |
| 4617888 | Pistons for internal combustion engines A piston for use in the cylinders of internal combustion engines of either spark ignition or compression ignition type. A succession of interrupted ribs, aligned along arcs of increasing radius, stand proud of the piston crown surface to promote turbulenc... | 10/21/1986 |
| 4567863 | Apparatus for reducing damage associated with detonation and/or destructive knock A piston for attenuation of detonation in a combustion chamber in an internal combustion engine has a top wall accommodating a cap. The cap has an upwardly and inwardly inclined first section, a downwardly and inclined second section and a transverse wall... | 02/04/1986 |
| 4541377 | Piston dome An improved dome-shaped piston head is disclosed characterized by a plurality of channels, depressions, and recesses which enhance the flow of an air-fuel mixture around the piston head in a combustion chamber and the flow of exhaust gases from the chambe... | 09/17/1985 |
| 4508073 | Combustion space of a piston driven internal combustion engine A reciprocating lens-like combustion space is formed in a piston internal combustion engine which is located with approximately one-half in a recess of the piston top and with approximately the other half in the cylinder head. By the dimensioning of the c... | 04/02/1985 |
| 4487179 | Internal combustion engine The internal combustion engine includes a cylinder block and a cylinder head forming a plurality of cylinders with a piston in each cylinder, a camshaft to open and close intake and exhaust ports, and a crankshaft to enable the piston to move back and for... | 12/11/1984 |
| 4483289 | Synthesis procedure and combustion chamber with variable turbulence The combustion structure of an internal combustion engine comprises a cavity formed in the end wall of the piston and a projection on said piston adjacent its cavity to that the projection in the injection, ignition and combustion phase of the cycle only ... | 11/20/1984 |
| 4471734 | Anti-roll-up vortex piston Modifications of piston top geometry eliminate the formation of the coherent roll-up vortex characteristic of most engines and dissipatively mix absorbed HC from the cylinder wall with hot gases in the cylinder to reduce unburned HC emissions.... | 09/18/1984 |
| 4467752 | Internal combustion engine An internal combustion engine having a cylinder 16, a cylinder head 10, and a piston 12 slidably mounted within the cylinder for reciprocating movement towards and away from the cylinder head, together defining a reaction chamber 22. The piston and cylind... | 08/28/1984 |
| 4378764 | Piston and combustion chamber with improved fuel circulation An internal combustion engine, which has a combustion chamber with a coordinated piston where the combustion chamber is divided into a first and second section, and where the piston has an extension which slides into the second chamber section during the ... | 04/05/1983 |
| 4359027 | Two-cycle internal combustion engine having high swirl combustion chamber Disclosed is a two-cycle, internal combustion engine including an engine block, and a cylinder in the engine block having a head and generally opposed inlet and outlet walls respectively including at least one intake port through which a fresh charge is a... | 11/16/1982 |
| 4357915 | Propeller and piston combination for internal combustion engines This piston design serves to increase engine horsepower, and causes less friction, while simultaneously reducing fuel consumption. It consists primarily of a propeller-topped piston, secured, by its wrist pin, in a rotatable swivel member in the top of a ... | 11/09/1982 |
