| Patents for F01L 13 - Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations (9,664) |
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| 01/16/1991 | EP0407699A1 Mechanical compression release system |
| 01/08/1991 | US4982706 Valve control apparatus having a magnet valve for internal combustion engines |
| 01/03/1991 | DE3920895A1 Phase adjustment mechanism for engine valve - use of transmission element with curved bearing surface |
| 01/02/1991 | EP0406026A2 Variable valve timing and lift device |
| 01/02/1991 | EP0405927A1 Valve moving mechanism for four-cycle engine |
| 01/02/1991 | EP0405187A1 Electromagnetic positioning device |
| 01/01/1991 | US4981119 Method of increasing the exhaust braking power of an internal combustion engine |
| 12/27/1990 | EP0404457A1 Method of detecting failure of a valve timing changeover control system of an internal combustion engine |
| 12/25/1990 | US4979475 Rocker arm with rounded channel to engage a valve stem with semi-spherical end |
| 12/18/1990 | US4977868 Internal combustion engine |
| 12/18/1990 | US4977867 Self-adjusting variable duration hydraulic lifter |
| 12/11/1990 | US4976230 Valve mechanism, preferably for an internal combustion engine, having pressure medium supply passage |
| 12/04/1990 | US4974566 Optimal swirl generation by valve control |
| 12/04/1990 | US4974560 Mechanism for varying valve duration in an internal combustion engine |
| 11/29/1990 | WO1990014505A1 Device for automobile motor timing system with variable valve lifts |
| 11/22/1990 | EP0397776A1 Mechanism for achieving variable valve lift. |
| 11/22/1990 | DE4014461A1 Valve drive mechanism for lifting valve in IC engine - has plunger, cam and guide sleeve in which is inlet duct |
| 11/07/1990 | EP0396325A1 Variable-cycle engine |
| 11/07/1990 | EP0396154A2 Valve disabling mechanism for an internal combustion engine |
| 10/23/1990 | US4964375 Valve operating mechanism |
| 10/16/1990 | US4962732 Valve operating device for internal combustion engine |
| 10/03/1990 | EP0389609A1 Device for actuating the valves of internal combustion engines with adjustable valve-lifting cam. |
| 10/02/1990 | US4960084 Valve timing control system for internal combustion engine |
| 09/18/1990 | US4957075 Apparatus for controlling inlet of exhaust valves |
| 09/18/1990 | CA1274132A1 Valve operating mechanism for internal combustion engine |
| 08/29/1990 | EP0384361A2 Valve train for automotive engine |
| 08/28/1990 | USRE33310 Valve operating and interrupting mechanism for internal combustion engine |
| 08/22/1990 | EP0383088A1 Engine brake for lorries |
| 08/21/1990 | US4949751 Compression release retarder with valve motion modifier |
| 08/16/1990 | WO1990009514A1 A method and a device for engine braking a four stroke internal combustion engine |
| 08/02/1990 | DE3936808A1 Engine braking system controlled by outlet cam - involves method of doubling effective braking stroke |
| 08/01/1990 | EP0379720A1 Method for increasing the brake power of a four-stroke alternating piston-type internal-combustion engine |
| 07/17/1990 | CA1271675A1 Engine retarding method and apparatus |
| 07/04/1990 | EP0376703A2 Engine control system |
| 07/04/1990 | EP0376561A1 Valve control system for internal combustion engine |
| 07/03/1990 | US4938179 Valve control system for internal combustion engine |
| 06/26/1990 | US4936273 Decompression system for diesel engines |
| 06/26/1990 | US4936264 Intake- and/or exhaust-valve timing control system for internal combustion engines |
| 06/21/1990 | DE3842283A1 Control system with adjustable valve timings for four-stroke engines |
| 06/19/1990 | US4934348 Valve operation control system of internal combustion engine |
| 06/13/1990 | DE4000531A1 Adjusting engine valve stroke - involves hydraulic cylinder-piston closure device |
| 06/13/1990 | DE3923371C1 IC engine valve control system - can adjust exhaust valve lift to give throttle effect during engine braking |
| 06/12/1990 | US4933862 Engine control apparatus |
| 06/12/1990 | US4932372 Apparatus and method for retarding a turbocharged engine |
| 06/05/1990 | US4930471 Engine-braking device for internal-combustion engine |
| 06/05/1990 | US4930465 Solenoid control of engine valves with accumulator pressure recovery |
| 06/05/1990 | US4930463 Electro-rheological valve control mechanism |
| 06/05/1990 | CA1269901A1 Process and system for compression release engine retarding |
| 05/31/1990 | DE3839451A1 Multi cylinder internal combustion engine |
| 05/30/1990 | EP0370218A1 Four-stroke internal-combustion engine |
| 05/30/1990 | EP0370216A1 Engine brake with a throttle valve in the cylinder head of an internal-combustion engine |
| 05/30/1990 | EP0370215A1 Engine-braking system for an internal-combustion engine |
| 05/29/1990 | US4928641 Lubricant supplying system for DOHC type multi-cylinder internal combustion engine |
| 05/22/1990 | US4926823 Method of controlling an air/fuel ratio or an internal combustion engine |
| 05/22/1990 | US4926804 Mechanism for switching valve operating modes in an internal combustion engine |
| 04/24/1990 | US4919089 Valve operating system for internal combustion engine |
| 04/19/1990 | DE3834715A1 Adjustable valve gear for a lifting valve |
| 04/18/1990 | EP0364069A1 Valve operating system of internal combustion engine |
| 04/17/1990 | US4917058 Method of reducing pumping losses and improving brake specific fuel consumption for an internal combustion engine |
| 04/17/1990 | US4917057 Control method for valve-timing changeover in engine |
| 04/17/1990 | US4917056 Valve operation control system in internal combustion engine |
| 04/11/1990 | EP0362775A1 Decompressing device of internal-combustion engines |
| 04/11/1990 | EP0362774A1 An apparatus for preventing reverse rotation of an engine |
| 04/05/1990 | WO1990003497A1 Device for actuating the valves of internal combustion engines with adjustable valve-lifting cam |
| 04/04/1990 | EP0362076A1 Valve timing control system for internal combustion engine |
| 04/04/1990 | EP0361861A1 Intake- and/or exhaust-valve timing control system for internal combustion engines |
| 04/04/1990 | EP0361474A1 Engine start facilitating valve |
| 04/03/1990 | US4913106 Variable duration valve lifter improvements |
| 03/29/1990 | DE3831642A1 Valve gear for a lift valve in an internal combustion engine |
| 03/27/1990 | US4911124 Engines for use with gaseous fuels |
| 03/27/1990 | US4911114 Device for switching valve operation modes in an internal combustion engine |
| 03/27/1990 | US4911111 Intake manifold for an internal combustion engine |
| 03/21/1990 | EP0359363A1 Control method for valve-timing changeover in engine |
| 03/20/1990 | US4909196 Valve operating mechanism for internal combustion engine |
| 03/20/1990 | US4909195 Valve operating system of internal combustion engine |
| 03/13/1990 | US4907550 Apparatus for changing operation timing of valves for internal combustion engine |
| 03/06/1990 | US4905635 Valve gear for internal combustion engine |
| 02/21/1990 | EP0354926A1 Variable timing system for engine valve operating gear. |
| 02/20/1990 | US4901684 Variable lift cam follower |
| 02/13/1990 | US4899701 Valve operation control device for internal combustion engine |
| 02/07/1990 | EP0353989A2 Cylinder head structure for plural cylinder engines |
| 02/07/1990 | EP0353863A1 Control method for valve-timing changeover in engine |
| 02/06/1990 | US4898206 Compression release retarder with valve motion modifier |
| 02/06/1990 | US4898133 Automatic compression release apparatus for an internal combustion engine |
| 02/06/1990 | US4898130 Valve mechanisms |
| 02/06/1990 | US4898128 Compression relief engine brake for internal combustion engines |
| 01/31/1990 | EP0352580A1 Operating system of internal-combustion engine valves |
| 01/11/1990 | DE3920938A1 Control device for inlet and exhaust valves of an internal combustion engine with at least one deactivatable cam on a camshaft |
| 01/11/1990 | DE3823332A1 Device for a reciprocating piston engine with variable camshaft |
| 01/09/1990 | US4892068 Geared automatic compression release for an internal combustion engine |
| 01/09/1990 | US4892067 Valve control system for engines |
| 01/03/1990 | EP0348924A2 Valve device |
| 01/03/1990 | CN1038497A Rocker arm decoupler for two-cycle engine retarder |
| 12/26/1989 | US4889085 Valve operating device for internal combustion engine |
| 12/26/1989 | US4889084 Valve control device with magnetic valve for internal combustion engines |
| 12/20/1989 | EP0347211A1 Valve operation control system of internal combustion engine |
| 12/19/1989 | US4887561 Method of controlling valve operation in an internal combustion engine |
| 12/19/1989 | EP0345252A4 Variable lift cam follower. |
| 12/13/1989 | EP0345252A1 Variable lift cam follower. |
| 12/12/1989 | US4886022 Engine valve driving apparatus |