| 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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| 01/30/1992 | DE4111610A1 Engine valve with hydraulic tappet - makes use of pin to actuate valve within tappet |
| 01/23/1992 | WO1992001144A1 Variable valve timing |
| 01/23/1992 | DE4122251A1 IC engine camshaft assembly - has one or more rotating cams and uses intermeshing claws as moving couplings between cam and shaft |
| 01/14/1992 | US5080055 Variable valve timing arrangement for internal combustion engine |
| 01/14/1992 | US5080054 Rocker arm arrangement for variable timing valve train |
| 01/14/1992 | US5080053 Rotary drives |
| 01/07/1992 | US5078102 Engine valve driving device |
| 12/27/1991 | EP0462853A1 Variable amplitude device for the lift of at least one internal combustion engine valve |
| 12/24/1991 | US5074260 Valve driving device and valve driving method for internal combustion engine |
| 12/18/1991 | EP0461985A1 Valves disabling system for internal combustion engine |
| 12/18/1991 | EP0461342A1 Diesel engine |
| 12/04/1991 | EP0458857A1 A method and a device for engine braking a four stroke internal combustion engine. |
| 11/21/1991 | DE4016224A1 Cable for IC engine starting - automatically and simultaneously operates valve lifter-decompression valve and carburettor |
| 11/19/1991 | US5065720 Engine with mechanical governor and decompression device |
| 11/19/1991 | US5065709 Valve operating system for internal combustion engine |
| 10/29/1991 | US5060604 Method of detecting failure of a valve timing changeover control system of an internal combustion engine |
| 10/23/1991 | EP0452671A2 Valve actuating mechanism in four-stroke cycle engine |
| 10/22/1991 | US5058540 Engine valve driving device |
| 10/16/1991 | EP0452158A1 SOHC type internal combustion engine |
| 10/15/1991 | US5056476 Variable valve duration and lift for an internal combustion engine |
| 10/14/1991 | WO1991016527A1 Valve mechanism in internal combustion engine |
| 10/09/1991 | EP0450332A1 Valve actuating mechanism in four-stroke cycle engine |
| 10/01/1991 | US5052350 Device to combine the motions of two camlobes differentially phased |
| 10/01/1991 | CA1289825C Method of and apparatus for controlling valve operation in an internal combustion engine |
| 09/24/1991 | US5050546 Valve device |
| 09/24/1991 | US5050384 Two-stroke cycle internal combustion engine |
| 09/18/1991 | EP0446919A1 Variable timing process and mechanism for a compression release engine retarder |
| 09/18/1991 | EP0446577A1 Engine brake for air compressing engine |
| 09/17/1991 | US5048480 Variable timing process and mechanism for a compression release engine retarder |
| 09/17/1991 | US5048476 Two-cycle internal combustion engine |
| 09/17/1991 | US5048474 Valve train for automotive engine |
| 09/16/1991 | CA2038041A1 Variable timing process and mechanism for a compression release engine retarder |
| 09/10/1991 | US5046462 Rocker arm arrangement for variable valve timing type internal combustion engine valve train |
| 09/05/1991 | WO1991013241A1 Valve duration and lift variator for internal combustion engines |
| 08/29/1991 | DE4026499C1 Four-stroke piston IC engine brake system - has tilting or swivelling transmission lever with bearing pin, carrying axially slidable roll |
| 08/27/1991 | US5042437 Cam shaft |
| 08/22/1991 | WO1991012415A1 Cam mechanisms |
| 08/21/1991 | EP0442460A1 Variable timing system, particularly for an internal combustion engine |
| 08/21/1991 | EP0441909A1 Valve control device with magnetic valve for internal combustion engines. |
| 08/17/1991 | WO1991012413A1 Valve control means |
| 08/08/1991 | DE4002856A1 Valve for IC engine - has variable-timing hydraulic control with inner and outer rotatable sleeves |
| 08/07/1991 | EP0440314A2 Method for variable valve timing for an internal combustion engine |
| 08/06/1991 | US5036811 Four-stroke internal-combustion engine |
| 08/06/1991 | US5036810 Engine brake and method |
| 08/06/1991 | US5036807 Variable valve timing lift device |
| 07/25/1991 | WO1991010816A1 Valve driving device |
| 07/25/1991 | WO1991010813A1 Hydraulic control device |
| 07/23/1991 | US5033420 Rocker arm arrangement for variable timing type valve train |
| 07/18/1991 | DE4100087A1 Mounting cam on cam shaft - involves pre-assembled cam and hollow cylinder |
| 07/18/1991 | DE4037824A1 Hydraulische stelleinrichtung Hydraulic adjustment device |
| 07/18/1991 | DE4025569C1 Valve brake for vehicle IC engine - has separately controllable cylinder outlet valves for drive and braking functions |
| 07/18/1991 | DE4000864A1 Pneumatically controlled decompression unit - is for IC engine and uses membrane to create two separate pressure zones |
| 07/16/1991 | US5031584 Variable lift valves |
| 07/16/1991 | US5031583 Valve operating device for internal combustion engine |
| 07/11/1991 | WO1991010047A1 Camshaft |
| 07/02/1991 | US5027760 Variable timing system for engine valve operating gear |
| 06/26/1991 | EP0434331A1 Drive arrangement for valves of an internal combustion engine |
| 06/25/1991 | US5025761 Variable valve-timing device |
| 06/19/1991 | EP0432404A2 Valve control for distribution valves of internal combustion engines |
| 06/19/1991 | EP0313624B1 Improvements in or relating to driving connections between two rotatable bodies |
| 06/18/1991 | US5024191 Control system for a variable valve actuating mechanism of an internal combustion engine |
| 06/13/1991 | WO1991008381A1 Valve arrangement |
| 06/13/1991 | DE3940826A1 Valve system for free-piston IC engine - incorporates inlet and outlet valves within piston |
| 06/12/1991 | EP0431569A1 Compression release retarding system |
| 06/12/1991 | EP0309468B1 Variable actuator for a valve |
| 06/11/1991 | US5022353 Variable-cycle engine |
| 05/29/1991 | EP0429277A1 A valve arrangement for a combustion engine |
| 05/28/1991 | US5019119 Electro-rheological fuel injector |
| 05/28/1991 | US5018487 Valve timing mechanism with eccentric bushing on rocker shaft |
| 05/23/1991 | DE4035376A1 IC engine cylinder head valve - has magnetic stop limiting opening movement of valve |
| 05/22/1991 | EP0428278A1 Rotary drives |
| 05/21/1991 | US5016581 Valve mechanisms |
| 05/14/1991 | US5014829 Electro-rheological shock absorber |
| 05/08/1991 | EP0425899A1 Engine with mechanical governor and decompression device |
| 05/07/1991 | US5012778 Externally driven compression release retarder |
| 04/25/1991 | DE3934848A1 Camshaft with single control for several valve timings - has hollow shaft with peripheral slits firmly coupled to drive wheel |
| 04/16/1991 | US5007392 Cylinder head structure for multiple cylinder engines |
| 04/16/1991 | US5007391 Engine start facilitating valve |
| 04/11/1991 | DE3933923A1 Variable timing IC engine valve gear - uses spring and balance mechanism actuated by centrifugal force |
| 04/09/1991 | US5005540 Valve timing control system for an internal combustion engine |
| 04/04/1991 | WO1991005146A1 Solenoid control of engine valves with accumulator pressure recovery |
| 04/04/1991 | CA2066175A1 Solenoid control of engine valves with accumulator pressure recovery |
| 04/03/1991 | EP0420159A1 Variable valve timing rocker arm arrangement for internal combustion engine |
| 04/02/1991 | US5003939 Valve duration and lift variator for internal combustion engines |
| 03/21/1991 | WO1991003627A1 Valve control device with magnetic valve for internal combustion engines |
| 03/19/1991 | US5000146 Motor brake for commercial vehicles |
| 03/19/1991 | US5000145 Compression release retarding system |
| 03/19/1991 | US5000138 Installing spark plugs in a diesel internal combustion engine |
| 03/13/1991 | EP0416794A1 Valve mechanisms |
| 03/13/1991 | EP0416628A1 Rocker arm arrangement for variable timing type valve train |
| 03/07/1991 | DE4026480A1 Camshaft mechanism for IC engine - incorporates resilient buffer in recess in camshaft |
| 03/07/1991 | DE3929073A1 Valve control having magnet valve for IC engines |
| 03/05/1991 | US4996957 Control valve for a compression release engine retarder |
| 02/19/1991 | US4993372 Two stroke internal combustion engine with decompression valve |
| 02/12/1991 | US4991551 Apparatus for preventing reverse rotation of an engine |
| 02/06/1991 | EP0411238A1 Automatic compression release for an internal combustion engine |
| 01/29/1991 | US4987869 Device for controlling a vehicle engine-braking system |
| 01/22/1991 | US4986227 Variable lift valve train |
| 01/16/1991 | EP0408260A1 Valve operation system for internal combustion engine |
| 01/16/1991 | EP0407842A1 Engine brake for air compressing engine |