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| Number | Title | Issue Date |
| 8033264 | Rotary engine A lightweight rotary engine is provided that comprises a structurally efficient, lightweight rotor housing. Disposed in the wall of the rotor housing is a combustion zone thermal barrier insert. The thermal barrier insert is comprised of a material with low thermal ... | 10/11/2011 |
| 7350500 | Inverted cardioid engine An internal combustion engine comprising a support structure, including a tube and a hollow stator core, supported by and rigidly affixed to the tube. Additionally, a rotor assembly is eccentrically and rotatably mounted about the stator core and having a pair of pa... | 04/01/2008 |
| 7281513 | Inverted Wankel An internal combustion engine comprising a support structure, including a tube and a hollow stator core, supported by and rigidly affixed to the tube. Additionally, a rotor assembly is eccentrically and rotatably mounted about the stator core and having a pair of pa... | 10/16/2007 |
| 6321693 | Reciprocating rotary piston system and pressure pump and internal combustion engine using the same A reciprocating rotary piston system includes a cylinder (3) having an annular and hollow interior; a plurality of pistons (1A to 1D) of which first and second parties are formed to be disposed alternately on the same inner circumference of the cylinder, ... | 11/27/2001 |
| 6289867 | Rotary engine A rotary engine having a pair of nested rotors positioned with a housing to define a central combustion chamber and four subchambers having variable volumes. Rotors are mounted about a driveshaft extending through the housing. The rotary engine utilizes t... | 09/18/2001 |
| 5537973 | Rotary engine with glow ignition system A rotary engine in which two rotors having interleaving radial vanes revolve inside a cylindrical cavity and are connected to a planetary output gear system which causes them to alternately speed up and slow down. The radial vanes divide the cylindrical c... | 07/23/1996 |
| 5305721 | Rotary Wankel type engine A rotary Wankel type engine system is disclosed, wherein the crankshaft is supported by a center main roller bearing. The rotor apexes are sealed by two piece apex seals and by side seals. The engine system further includes an oiling system which permits ... | 04/26/1994 |
| 5203307 | Rotary wankel type engine A rotary Wankel type engine system is disclosed, wherein the crankshaft is supported by a center main roller bearing. The rotor apexes are sealed by two piece apex seals and by side seals. The engine system further includes an oiling system which permits ... | 04/20/1993 |
| 5022366 | Rotary engine with dual spark plugs and fuel injectors A stratified charge rotary combustion engine includes a main fuel injector, a pair of spark plugs and a piot fuel injector. The first spark plug is located upstream of the pilot fuel injector. The second spark plug is located upstream of the main fuel inj... | 06/11/1991 |
| 4212283 | Rotary engine An ignition plug is housed in a plug channel the cross-section of which reduces towards the end of the channel remote from the plug, and which terminates in an opening which is narrower in the direction of engine rotation. Burning efficiency is thereby en... | 07/15/1980 |
| 4170212 | Ignition system for rotary piston engines An ignition system for rotary piston engines includes a glow plug in addition to the normal leading spark plug and trailing spark plug. The glow plug is mounted in the housing of the engine on the leading side with respect to the trochoidal minor axis in ... | 10/09/1979 |
| 4164261 | Ignition apparatus for rotary piston engine The temperature of a glow plug mounted on an epitorocoidal engine housing on a leading side of the torocoid minor axis of a rotary piston engine in the direction of the rotor rotation is sensed. When the sensed temperature exceeds a predetermined temperat... | 08/14/1979 |
| 4162669 | Ignition system for rotary piston engines An ignition system for rotary piston engine wherein a glow plug mounted in the epitrochoidal housing of the engine is supplied with electric power to maintain the surface temperature of the glow plug within a range from 900° to 1100° C. A control unit f... | 07/31/1979 |
| 4142505 | Ignition system means for a rotary piston engine An ignition system means for a rotary piston engine having a leading and a trailing ignition plug and incorporating an exhaust gas recirculation system. A control circuit is disclosed which selectively stops or delays the sparking operation of the trailin... | 03/06/1979 |
| 4096828 | Rotary piston internal combustion engine A rotary piston internal combustion engine of the Wankel type for reducing unburned detrimental components such as NOx, HC, CO, etc. in exhaust gas without decrease of engine performance which comprises a first combustion chamber communicating by means of... | 06/27/1978 |
| 4095564 | Method and apparatus for igniting air-fuel mixture in an engine A method and apparatus for igniting the air-fuel mixture within a rotary combustion engine. A primary transformer core half and its primary winding are positioned in the upper cover plate of a Wankel rotary engine. Three spark plugs are electrically conne... | 06/20/1978 |
| 4077366 | Internal combustion engine control system An apparatus and method for improving the combustion process of an internal combustion engine is disclosed. A prechamber containing a combustible mixture is designed to generate a torch eminating therefrom upon ignition; the torch is controlled to extend ... | 03/07/1978 |
| 4014297 | Rotary engine combustion control arrangement An internal combustion rotary engine is disclosed having leading and trailing spark plugs with their respective spark electrodes arranged in peripherally spaced ignition openings in the inner peripheral wall of the engine's rotor housing. The leading igni... | 03/29/1977 |
| 3982502 | Ignition system for a rotary piston combustion engine An ignition system for a four-stroke rotary piston combustion engine of the trochoid type. The casing of the engine has an inner chamber bounded by a jacket with dual arc inside contour through which an eccentric shaft with an eccentric passes. A triangul... | 09/28/1976 |
| 3970049 | Ignition system for rotary piston engine There is provided an ignition system for a rotary piston engine comprising first and second ignition means mounted in a rotor housing. The first ignition means is positioned ahead of the second ignition means in the direction of rotation of a rotor. Switc... | 07/20/1976 |
| 3957020 | Ignition system for rotary piston engines An ignition system for rotary piston engines is disclosed wherein a plurality of ignition plugs are arranged and disposed in the combustion chamber in the directon of the rotation of a piston and connected to a common ignition coil so that one of them may... | 05/18/1976 |
| 3955362 | Exhaust heat conservation A method of programming exhaust gas constituents is disclosed which cooperates with a unique exhaust passage liner construction resulting in an improved self-cleaning technique for internal combustion engines. The liner comprises an apparatus which prefer... | 05/11/1976 |
| 3955539 | Rotary piston internal combustion engine A rotary piston internal combustion engine, particularly of trochoidal construction, with a polygonal piston in a multi-arched housing casing in which the piston is provided with combustion space recesses in its piston flanks whereby the ignition takes pl... | 05/11/1976 |
| 3952708 | Rotor mounted spark plug for rotary engine A rotary combustion engine rotor having spark plug receiving recesses formed in its respective peripheral faces, each recess releasably mounting an elongated spark plug assembly. The elongated spark plug assembly is configured for insertion and removal th... | 04/27/1976 |
| 3938489 | Ignition system for two-cylinder engines An ignition system for a two-cylinder engine is provided which comprises two ignition signal generators, two ignition coils and two spark plugs for each of the cylinders. The first ignition signal generator controls the first ignition coil and two of the ... | 02/17/1976 |
| 3937185 | Staggered configuration for wankel engine spark plugs A rotary internal combustion engine is disclosed having circumferential type cooling circuit for the rotor housing and a plurality of spark plugs extending through the trochoid wall of the rotor housing at a vertically rising zone of said circuit. The plu... | 02/10/1976 |
