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| Number | Title | Issue Date |
| 7434549 | Opposed double piston internal combustion engine An internal combustion engine including at least one engine cylinder includes a cylinder cavity with first and second stopping members interconnected by a cylinder wall, the cylinder further includes two piston members slidably moveable within said cylinder cavity a... | 10/14/2008 |
| 7341053 | Combustion chamber structure of an internal combustion engine A squish surface having the shape of a plane surface orthogonal to the axis of a piston is formed on the intake side of the piston top surface. A squish area is formed between the squish surface and a plane surface-shaped squish surface on the cylinder head side, an... | 03/11/2008 |
| 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 |
| 6971379 | Combustion chamber structure in an internal combustion engine There is provided a combustion chamber structure in an internal combustion engine in which, at a peripheral portion of a combustion chamber, a gap between a cylinder head lower face and a piston upper face is small in intake-to-intake and exhaust-to-exhaust zones an... | 12/06/2005 |
| 6708666 | Multi-zone combustion chamber for combustion rate shaping and emissions control in premixed-charge combustion engines An apparatus and method for improving efficiency of combustion engines. At least two combustion chambers are provided by contouring the surface of a piston or a cylinder head or a combination thereof. Such a contoured piston or cylinder head controls the peak temper... | 03/23/2004 |
| 5816229 | Internal combustion engine with hemi-spherical cylinder head and matched radiused piston An internal combustion engine having a piston is disclosed. The piston has a circular flat piston heat portion extending normal to the piston axis and opposed depressions opposite the combustion chamber intake and exhaust openings, respectively. The circu... | 10/06/1998 |
| 5738057 | Low profile internal combustion engine An internal combustion engine of the valve-in-head type having a low profile cylinder head which requires minimal head-room in the engine compartment of an automotive vehicle. The cylinder head has a rectilinear configuration with the valve trains dispose... | 04/14/1998 |
| 5390634 | Internal combustion engine having high performance combustion chamber An internal combustion engine has a cylinder head with a combustion chamber defined by a depression in the head. The raised face surface of a piston extends into the combustion chamber in the cylinder head as the piston approaches top dead center, and cre... | 02/21/1995 |
| 5000132 | Scavenging system for a two-stroke internal combustion engine A lengthwise scavenging system for a two stroke internal combustion engine comprising a ported cylinder, a piston, a wave formed sleeve which is attached to the piston, and a reentrant cylinder head which provide annular recess for the sleeve. The inlet p... | 03/19/1991 |
| 4763622 | Internal combustion engine of the spark ignition type In an internal combustion engine having two intake valves on one side and two exhaust valves on the other side of each cylinder, all four valves are displaced towards the exhaust valve side to provide room for a squish zone on the intake valve side. The s... | 08/16/1988 |
| 4669431 | Internal combustion engine with dual combustion chambers A spark-ignition overhead valve type internal combustion engine has its cylinder or cylinders closed at the top by semispherical cylinder heads with the piston terminating in a crown of semispherical configuration sized slightly smaller than that of the c... | 06/02/1987 |
| 4557231 | Combustion chamber of a reciprocating internal combustion engine which promotes a rotary combustion turbulence Projecting parts of the piston and the cylinder head are formed in such a manner that two portions of the piston surface are spaced from the inner surface of the cylinder head and a third portion of the piston surface is next to the inner surface of the c... | 12/10/1985 |
| 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 |
| 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 |
| 4457273 | Conical piston and cylinder head in internal combustion engine In an internal combustion engine a piston and a cylinder head defining a cylinder with a blind end thereatop are formed in a conical configuration. The piston compresses charges of an air/fuel mixture in the blind end of the cylinder, whereupon ignition o... | 07/03/1984 |
| 4258686 | Combustion system for internal combustion engines A combustion system for internal combustion engines having an exhaust gas recirculating system which is operable by a lean air-fuel mixture without aggravation of the combustion. The piston of the engine has a sub-piston projecting on the top thereof and ... | 03/31/1981 |
| 3999532 | Internal combustion engine fuel system A fuel system for an internal combustion engine. Fuel is injected into a cavity formed between the cylinder head and the piston head of each cylinder and a relatively rich air-fuel mixture is created in a localized space. The amount of injected fuel and t... | 12/28/1976 |
