| Patents for F02B 25 - Engines characterised by using fresh charge for scavenging cylinders (3,434) |
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| 06/04/1991 | US5020485 Two-cycle engine |
| 06/04/1991 | US5020483 Intake system for two cycle internal combustion engine |
| 05/29/1991 | DE3938794A1 IC engine with external compressor - has fuel-air mixture introduced to cylinder head over short crank angle near TDC |
| 05/16/1991 | WO1991006751A1 Combustion chamber |
| 05/15/1991 | EP0426660A1 Method of and apparatus for improving the operation of an engine. |
| 05/14/1991 | US5014663 Two-stroke internal combustion engine and cylinder head for the latter |
| 05/08/1991 | CN2076608U Internal combustion engine of rectangular piston reciprocating bidirection action crank round slide block type |
| 05/07/1991 | US5012775 Two-cycle engine |
| 05/01/1991 | CN2076163U Petrol engine for motorcycle |
| 04/24/1991 | EP0423813A1 V-type two-cycle internal combustion engine |
| 04/23/1991 | US5009207 Internal combustion engine |
| 04/23/1991 | US5009201 Two-cycle engine having a direct fuel injection system |
| 04/16/1991 | US5007384 L-head two stroke engines |
| 04/11/1991 | DE4030920A1 Combustion chamber for two=stroke engine - has elliptical cross=section with inlet and exhaust valves at opposite ends |
| 04/09/1991 | US5005539 Engine cycle control system |
| 04/09/1991 | US5005537 Method and device for introducing a carburetted mixture under pressure in a chamber of a two-stroke engine |
| 04/02/1991 | US5003934 Hood covering the space between cylinder banks of an internal-combustion engine which are arranged in a V-shape |
| 03/28/1991 | DE3930894A1 Two=stroke piston-valve engine - has cylinder wall mfd. without breaks and porous inserts in inlet ports |
| 03/20/1991 | CN1012096B Two-cycle engine and method of operation |
| 03/19/1991 | US5000135 Gasoline engine with single overhead camshaft having duel exhaust cams per cylinder wherein each exhaust cam has duel lobes |
| 03/19/1991 | US5000133 Two-cycle heat-insulating engine |
| 03/19/1991 | US5000132 Scavenging system for a two-stroke internal combustion engine |
| 03/19/1991 | US5000131 Exhaust port control valve for two stroke engine |
| 03/19/1991 | US5000127 Cylinder sleeve for two-cycle engine |
| 03/13/1991 | CN1011997B Hood for covering over space between v-shaped arranged banks of cylinder of internal combustion engine |
| 03/12/1991 | US4998512 Exhaust port control system for two stroke engine |
| 02/26/1991 | US4995354 Two-cycle engine |
| 02/26/1991 | US4995350 2-cycle uni-flow spark-ignition engine |
| 02/26/1991 | US4995349 Stratified air scavenging in two-stroke engine |
| 02/26/1991 | US4995348 Two-stroke internal combustion engines and process for operating said engines |
| 02/21/1991 | WO1991002144A1 Improved two stoke cycle spark ignition internal combustion engine |
| 02/20/1991 | EP0413317A1 Exhaust control valve system for parallel multi-cylinder two-cycle engine |
| 02/20/1991 | EP0413316A1 Exhaust control valve system for parallel multi-cylinder two-cycle engine |
| 02/19/1991 | US4993373 Sealing shroud port timing valve for two cycle engine |
| 02/19/1991 | US4993372 Two stroke internal combustion engine with decompression valve |
| 02/14/1991 | DE4007466A1 Reduced emissions two=stroke IC engine - has separately lubricated piston which operates without oil being mixed with fuel |
| 02/05/1991 | US4989409 Exhaust device for small sized boat engine |
| 01/24/1991 | WO1991000684A1 Twi-stroke cycle engine cylinder construction |
| 01/22/1991 | US4986780 Two cycle engine |
| 01/22/1991 | US4986224 Internal combustion engine |
| 01/17/1991 | CA2018632A1 Ceramic engine |
| 01/16/1991 | EP0408180A1 Method and apparatus for determining air mass in a crankcase scavenged two-stroke engine |
| 01/15/1991 | CA1278964C Two stroke cycle internal combustion engines |
| 01/02/1991 | EP0406083A1 Device for controlling the start of the introduction of pressurized mixture in an internal combustion engine and its application to the two-stroke engine |
| 01/02/1991 | EP0406079A2 Two-stroke engine with pneumatic injection and flow throttle in at least one transfer passage |
| 01/02/1991 | EP0406078A1 Two-stroke engine with rotating valves and operation of said engine |
| 01/02/1991 | EP0405919A1 Water propelled internal-combustion engine system |
| 12/27/1990 | EP0404341A1 Sealing shroud port timing valve for two-stroke cycle engine |
| 12/27/1990 | EP0404338A1 Two cycle engine scavenging heat control |
| 12/27/1990 | EP0159320B1 Internal combustion engine and operating cycle therefor |
| 12/19/1990 | CN1047907A Ic engine |
| 12/18/1990 | US4977875 Two-stroke-cycle uniflow spark-ignition engine |
| 12/13/1990 | WO1990015230A1 Internal combustion engine |
| 12/05/1990 | EP0400338A2 Device for varying the direction in which fuel flows into an engine cylinder, in particular of a two-stroke motorcycle engine |
| 11/28/1990 | CN1010602B Air scavenging type two-stroke gasoline engine |
| 11/20/1990 | US4970996 Two stroke diesel engine |
| 11/14/1990 | EP0397521A1 Engine cycle control system |
| 11/14/1990 | EP0397361A1 Two-cycle heat-insulating engine |
| 11/13/1990 | US4969329 Two cycle engine with exhaust emission control |
| 11/07/1990 | EP0396530A1 Scavenging system for a two-stroke internal combustion engine |
| 11/07/1990 | EP0396325A1 Variable-cycle engine |
| 11/07/1990 | EP0396262A2 Two cycle engine with exhaust emission control |
| 11/05/1990 | CA2015916A1 Two cycle engine with exhaust emission control |
| 10/31/1990 | EP0395406A1 Heat-insulated four-stroke engine with prechamber |
| 10/31/1990 | EP0245331B1 Two stroke internal combustion engine |
| 10/31/1990 | DE4012500A1 Scavenging of a two-stroke engine - is improved by use of collars formed on poppet valve heads, on valve seating side but inside valve seat contact area |
| 10/31/1990 | DE4012499A1 Scavenging of two-stroke IC engine - by pump and two synchronised rotary valves |
| 10/31/1990 | DE4012492A1 Scavenging of two-stroke IC engine - has projection on wall of inlet port which deflects air to side of cylinder |
| 10/31/1990 | DE4012491A1 Two stroke IC engine - has fuel injection valve which begins to operate after closing of exhaust valve |
| 10/31/1990 | DE4012490A1 Two stroke IC engine - has means to change timing of opening and closing of inlet valve |
| 10/31/1990 | DE4012474A1 Two stroke IC engine - has variable valve timing which is adjusted to suit engine load |
| 10/31/1990 | DE4012471A1 Scavenging system for two stroke IC engine - which has one inlet valve for scavenging air and one valve for fuel-air mixture |
| 10/30/1990 | US4966104 Two-stroke engines |
| 10/23/1990 | US4964382 Piston for two-cycle internal combustion engine |
| 10/23/1990 | US4964379 Twin-piston two-stroke engine |
| 10/10/1990 | EP0391793A1 Two-stroke internal-combustion engine |
| 10/04/1990 | WO1990011436A1 Stepped piston engine |
| 09/19/1990 | CN1045441A Check valve-type internal combustion engine |
| 09/18/1990 | US4957081 Combustion chamber of an engine |
| 09/11/1990 | US4955328 Leading piston engine with two cylinders interconnected through a transfer port |
| 08/30/1990 | DE3905903A1 Two-stroke engine, particularly for driving motor vehicles |
| 08/29/1990 | EP0384492A2 Control process for two-stroke internal-combustion engines |
| 08/28/1990 | WO1990010145A1 Engine supercharger and inlet manifold arrangement |
| 08/28/1990 | CA2046326A1 Engine supercharger and inlet manifold arrangement |
| 08/23/1990 | DE3940027A1 Opposed piston two=stroke IC engine - uses supercharged air supply and fuel injection into cylinders |
| 08/23/1990 | DE3937679A1 Outlet control for two=stroke IC engine - has piston shaped control member forming part of outlet channel |
| 08/22/1990 | EP0382776A1 Exhaust control valve for two-stroke cycle engines and process for using the same. |
| 08/21/1990 | US4949689 Timing of fuel injected engines |
| 08/16/1990 | EP0382063A1 2-Cycle multi-cylinder engine |
| 08/09/1990 | WO1990008884A1 An improved cylinder and piston assembly for a two-stroke cycle internal combustion engine |
| 08/08/1990 | EP0381163A1 2-Cycle engine |
| 08/07/1990 | US4945868 Two cycle exhaust recycling |
| 08/07/1990 | US4945867 Two-stroke engine |
| 08/07/1990 | CA1272420A1 Timing of fuel injected engine |
| 08/02/1990 | DE3900800A1 Opposed-piston internal combustion engine |
| 08/01/1990 | EP0250497B1 Two-stroke cycle engine |
| 07/31/1990 | US4944255 Two-stroke engine with pneumatic injection and flowrate restriction at the exhaust |
| 07/12/1990 | DE3900558A1 Mixture-compressing two-stroke internal combustion engine |
| 07/10/1990 | US4940029 Turbocompounded two-stroke piston engines |
| 07/04/1990 | EP0376836A1 Device for introducing a carburetted mixture to the combustion chamber of a two-stroke engine |