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| Number | Title | Issue Date |
| 7331315 | Two-stroke engine with fuel injection A two-stroke internal combustion engine is provided with a fuel injector. The two-stroke internal combustion engine may have at least one transfer passage, an air channel, and a fuel injector. The transfer passage is between a crankcase and a combustion chamber of t... | 02/19/2008 |
| 7082910 | Two-stroke internal combustion engine Crankcase scavenged two-stroke internal combustion engine (1), in which a piston ported air passage is arranged between an air inlet (2) and the upper part of a number of transfer ducts (3, 3′). The air passage is arranged from an air inlet ( | 08/01/2006 |
| 6955143 | Internal combustion engine Fuel/air mixture is introduced transversely through cylinder into combustion chamber where it is ignited by spark plug to drive compound piston assembly to bottom of its stroke to rotate drive shaft. In another embodiment, air is introduced transversely through cyli... | 10/18/2005 |
| 6935285 | Two-cycle combustion engine having two-staged piston A two-cycle combustion engine having a two-staged piston, is simple in structure and inexpensive and addresses a undesirable blow-off phenomenon of the air-fuel mixture. The two-cycle combustion engine includes a cylinder block having a two-staged cylinder bore with... | 08/30/2005 |
| 6145488 | Reduced volume scavenging system for two cycle engines A reduced volume scavenging system for a two cycle engine embodying a duplex cylinder having an upper cylinder bore and a reduced-diameter lower cylinder bore. The lower bore communicates with a crankcase that houses a crankshaft, connecting rod(s) and en... | 11/14/2000 |
| 5870980 | Stepped piston internal combustion engine A stepped-piston, internal-combustion engine includes at least one cylinder, each cylinder having a working part of lesser diameter defined by a cylindrical wall and a pumping part of greater diameter, a piston slidable in each cylinder, a receiver which ... | 02/16/1999 |
| 5857450 | Low emission two cycle engine using two segment piston An internal combustion engine is provided with a top hat piston disposed in a cylinder having first and second portions of different diameters. The piston, with first and second portions of different diameters, is disposed within the cylinder and defines ... | 01/12/1999 |
| 5769040 | Two cycle internal combustion engine An improved two cycle internal combustion engine, preferably of a stepped piston type, having a unique arcuately shaped transfer deflector valve, which varies by its controlled sliding movement within an inlet passage, the size of exposed opening of an el... | 06/23/1998 |
| 5540195 | Vuka two-stroke engine An improved two-stroke internal combustion engine utilizing a vacuum chamber to create vacuum, which sucks the exhaust out from the combustion chamber, and forces the charge into it.... | 07/30/1996 |
| 5437251 | Two-way rotary supercharged, variable compression engine A variable-compression internal-combustion engine has a two-stage cylinder with a relatively large diameter at a first-stage, supercharge end, which is also a power-takeoff end, than at a second-stage, combustion end of the cylinder. Intake air is drawn i... | 08/01/1995 |
| 5189995 | Stepped piston engine A stepped piston engine comprises first (10), second (11) and third (12) stepped cylinders, each cylinders (10,11,12) having a larger diameter pumping part (10p,11p,12p), and a smaller diameter working part (10w,11w,12w), and a piston (13,14,15) slidable ... | 03/02/1993 |
| 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 |
| 4781153 | Internal combustion engine An internal combustion engine has a pair of stepped cylinders (14,15) in which stepped pistons (P1,P2) are received, each cylinder (14,15) and piston (P1,P2) having a pumping part of larger diameter and a working part of smaller diameter transfer paths fr... | 11/01/1988 |
| 4672931 | Lubrication system with oil recovery for a two-stroke engine piston with pump-sump for scavenging A lubrication system with oil recovery for a two-stroke engine piston with pump-sump for scavenging, said system consisting of a lubicating oil pressure circulation system having inlet and outlet holes for the oil, said holes passing through the wall of t... | 06/16/1987 |
| 4630591 | Stratified charge internal combustion engines A stratified-charge two-stroke internal combustion engine of the kind in which a rich mixture of fuel and air reaches each cylinder from an auxiliary transfer passage, and further air from a main transfer passage. The fuel-supply device for each cylinder ... | 12/23/1986 |
| 4331108 | Radial engine An engine comprising; a substantially cylindrical housing; a rotor rotatably mounted in said housing on an axis parallel with the longitudinal central axis of the housing to execute an orbital motion within the housing, a plurality of tubular elements eac... | 05/25/1982 |
| 4210108 | Stepped piston two-stroke engines A two-stroke internal combustion engine having a stepped piston in which the cylinder casting has a bore of greater diameter to form a pumping part, a bore of lesser diameter to form a working part, exhaust port means in the working part and opposed trans... | 07/01/1980 |
| 4178885 | Rotary piston/cylinder engines A rotary piston/cylinder engine comprises a rotor assembly which is mounted to rotate about an axis of rotation and comprises a double-headed piston member and a double-headed cylinder member defining two cylinders in which two pistons of the piston membe... | 12/18/1979 |
| 4170966 | Mixture-compressing internal combustion engine, especially four-cycle engine A mixture-compressing internal combustion engine with a combustion space arranged either in the piston or in the cylinder head and with an ignition source located in the cylinder head; the main volume of the combustion space is thereby delimited by circul... | 10/16/1979 |
| 4151814 | Fuel and water injection stepped piston internal combustion engine An internal combustion engine having a power generating assembly consisting of a piston with a top step, in a similarly-shaped cylinder. This defines a reduced top compression chamber into which fuel is injected and wherein combustion takes place due to t... | 05/01/1979 |
| 4068629 | Stepped piston two stroke engines A stepped piston two cycle engine, of the type including at least one set of two cylinders each such cylinder having a working part of smaller diameter and a pumping part of larger diameter, at least the air for each charge required by the working part of... | 01/17/1978 |
| 3996903 | Internal combustion engine In a two-stroke cycle internal combustion engine a noncompression type pump formed by placing a plate-like secondary piston within a primary piston, between the top and the wrist pin. The reciprocating movements of primary and secondary piston in conjunct... | 12/14/1976 |
