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| Number | Title | Issue Date |
| 8011331 | Eight-stroke engine cycle An eight-stroke engine cycle may include a first stroke forming an intake stroke and including opening an intake valve and providing a first fuel mass to the combustion chamber. The second stroke may form a first compression stroke and the third stroke may form a fi... | 09/06/2011 |
| 7418928 | Engine and method for operating an engine A method of operating an engine is provided. The engine may have a housing with one or more combustion chambers, including a first combustion chamber. The engine may also have a piston in fluid communication with the first combustion chamber. The method may include ... | 09/02/2008 |
| 7252069 | Gas fuel engine and control method for the same In a gas fuel engine, a first air-fuel mixture having a local excess air factor λ not less than 2 is combusted (a first combustion). When a target torque is not sufficiently obtained by the first combustion, a fuel is directly injected into a combustion chamber to ... | 08/07/2007 |
| 6622690 | Direct injection type internal combustion engine and controlling method therefor A direct injection type internal combustion engine has an intake and exhaust mechanism for intaking and exhausting air for a predetermined period of time between a second half of a second expansion stroke and a first half of a first compression stroke fol... | 09/23/2003 |
| 5609131 | Multi-stage combustion engine The invention is a combustion method for operation of a multiple cylinder internal combustion engine in a cycle including intake, compression, expansion and exhaust strokes. A first amount of fuel is introduced into each of the cylinders with introduction... | 03/11/1997 |
| 5265562 | Internal combustion engine with limited temperature cycle An expandable chamber piston type internal combustion engine operating in an open thermodynamic cycle includes a combustion process having a constant volume (isochoric) phase followed by a constant temperature (isothermal) phase.... | 11/30/1993 |
| 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 |
| 4635591 | Internal-combustion engines In a cylinder head for internal combustion engines, the engine having a longitudinal axis and intake and exhaust ports, the head including at least one concave portion defining a curved wall of a combustion chamber, the combustion chamber being provided w... | 01/13/1987 |
| 4321904 | Internal combustion engine with auxiliary combustion chamber An internal combustion engine includes a power cylinder, a power piston reciprocating therein and an auxiliary piston reciprocating within an auxiliary cylinder. Passages connect the upper end of the auxiliary cylinder to a combustion chamber and a source... | 03/30/1982 |
| 4070998 | Compression ignition control pressure heat engine A fuel injected heat engine of the reciprocating type wherein a piston moves reciprocally within a cylinder to compress gases for the support of combustion and to be moved by burning gases to turn a crank with torque, there being a low compression storage... | 01/31/1978 |
| 4060059 | Internal combustion engine An internal combustion engine with greatly reduced emission of pollutants includes a piston having a piston chamber communicating through orifices with the working chamber of the cylinder and an annular balancing chamber communicating with the working cha... | 11/29/1977 |
| 4041910 | Combustion engine An arrangement for an internal combustion engine is provided in which one or more of the cylinders of the engine are used for generating hydrogen rich gases from hydrocarbon fuels, which gases are then mixed with air and injected into the remaining cylind... | 08/16/1977 |
| 4038953 | Rotary internal combustion engine having rotary valve means for fuel and air introduction A rotary internal combustion engine comprising an engine frame having a rotor rotatably mounted therein which has a plurality of radially spaced cylinders mounted thereon. The free floating piston is slidably mounted in each of the cylinders with the head... | 08/02/1977 |
| 3964263 | Six cycle combustion and fluid vaporization engine A reciprocating piston engine of the type including a piston reciprocal in a cylinder toward and away from an expansion chamber at one end of the cylinder and also provided with intake and exhaust valves openable and closable in timed sequence with recipr... | 06/22/1976 |
