| Patents for F01L 1 - Valve-gear or valve arrangements, e.g. lift-valve gear (30,520) |
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| 03/07/1991 | DE4026480A1 Camshaft mechanism for IC engine - incorporates resilient buffer in recess in camshaft |
| 03/07/1991 | DE3929624A1 Camshaft for IC engine - has hollow hub for drive wheel and two cavities, with flange and neck |
| 03/07/1991 | DE3929620A1 Adjustment with drive wheel and shaft - has hollow hub mounted in shafts end cavity with flange and thrust ring |
| 03/07/1991 | DE3929619A1 Connecting rod for shafts pivot angle - has adjustment between drive wheel and shaft, cam shaft with disc flange |
| 03/06/1991 | EP0415022A1 Automotive internal combustion engine with a liquid cooling system |
| 03/05/1991 | US4996966 Supercharged engine |
| 03/05/1991 | US4996955 Intake- and/or exhaust-valve timing control system for internal combustion engines |
| 03/05/1991 | US4996954 Method for detecting an irregularity in valve-timing changeover in an engine |
| 03/05/1991 | US4996875 Apparatus and method for evaluation of fluid flow within a combustion chamber |
| 03/05/1991 | US4996768 Camshaft installation method |
| 02/28/1991 | DE3928066A1 EM valve opening and closing device - has two magnet systems of small dimensions to reduce reaction time |
| 02/26/1991 | US4995353 Valve train with lash/compliance compensation |
| 02/26/1991 | US4995352 Dynamic valve mechanism of internal combustion engine |
| 02/26/1991 | US4995281 Lightweight rocker arm |
| 02/21/1991 | DE3926809A1 Damping arrangement for valves in IC engine - makes use of conical bodies to avoid need for anti-knock agents |
| 02/21/1991 | DE3926804A1 Valve drive for IC engine - makes use of spring-loaded buffer and positive connection drive |
| 02/20/1991 | EP0413237A1 Cam follower assembly with pinless roller |
| 02/19/1991 | USRE33538 Valve operation control device for internal combustion engines |
| 02/19/1991 | US4993376 Restoring force reciprocating member |
| 02/19/1991 | US4993372 Two stroke internal combustion engine with decompression valve |
| 02/19/1991 | US4993370 Valve driving mechanism for internal combustion engine |
| 02/19/1991 | US4993150 Process for producing cup tappets for reciprocating-piston machines |
| 02/19/1991 | CA1280324C Valve operating mechanism for internal combustion engine |
| 02/14/1991 | DE3926430A1 IC engine with at least two camshafts - has tool interlocking with and fixing camshafts w.r.t. each other to allow correct setting of angular positions |
| 02/14/1991 | DE3926423A1 Four-stroke IC engine - has two inlet valves in combustion chamber, one valve opening briefly during exhaust stroke |
| 02/12/1991 | US4991765 Push rod manufacturing method |
| 02/12/1991 | US4991550 Oil pressure rush adjuster of a directly acting type |
| 02/12/1991 | US4991549 Cylinder head arrangement |
| 02/12/1991 | US4991547 Intake port pressure control system for engine induction system |
| 02/07/1991 | WO1991001437A1 Low profile internal combustion engine |
| 02/07/1991 | WO1991001435A1 Modular position controller for variable valve timing |
| 02/06/1991 | EP0412064A1 A cylinder head for an internal combustion engine with five valves per cylinder |
| 01/31/1991 | CA2017745A1 Lightweight rocker arm |
| 01/29/1991 | US4988034 Mechanical part having ceramic and metal sections soldered together and method of producing same |
| 01/24/1991 | DE3923927A1 Valve mechanism for IC engine - incorporates space-saving linkage with crankshaft |
| 01/22/1991 | US4986801 Device for a relative angular adjustment between two shafts connected to one another by driving means |
| 01/22/1991 | US4986227 Variable lift valve train |
| 01/22/1991 | US4986166 Hydraulic valve lash adjuster |
| 01/21/1991 | WO1991001434A1 Autocalibration of camshaft phasing feedback in a variable valve timing system |
| 01/21/1991 | CA2063815A1 Autocalibration of camshaft phasing feedback in a variable valve timing system |
| 01/20/1991 | CA2015208A1 Modular position controller |
| 01/17/1991 | DE3922962A1 IC-engine camshaft angle adjuster - has camshaft vanes movable in chambers of timing wheel, the movement controlled by hydraulic pressure against action of spring |
| 01/16/1991 | EP0408260A1 Valve operation system for internal combustion engine |
| 01/16/1991 | EP0408081A1 Cylinder head lubricating system of an internal combustion engine |
| 01/16/1991 | EP0408080A2 Valve and spring arrangement for engine |
| 01/16/1991 | EP0408079A1 Valve actuating arrangement for engine |
| 01/16/1991 | EP0407761A2 Control shaft |
| 01/09/1991 | EP0407302A1 Method for adjusting the valve play in an internal combustion engine and device for implementing this method |
| 01/09/1991 | EP0406697A1 Automotive internal-combustion engine with camshaft drive system |
| 01/09/1991 | EP0406528A1 Camshaft drive for multicylinder V-engine |
| 01/09/1991 | EP0406527A1 Driving system for two oil pumps of an internal combustion engine with reciprocating pistons |
| 01/09/1991 | CN2069038U Well pump having mechanical control fixed valve |
| 01/08/1991 | US4983797 Method for manufacturing a composite camshaft |
| 01/08/1991 | US4982706 Valve control apparatus having a magnet valve for internal combustion engines |
| 01/03/1991 | DE4018880A1 Method of welding two members |
| 01/03/1991 | DE3920799A1 Cam activated IC engine valve mechanism - uses of sprung disc as tappet contact area |
| 01/02/1991 | EP0406026A2 Variable valve timing and lift device |
| 01/02/1991 | EP0405927A1 Valve moving mechanism for four-cycle engine |
| 01/02/1991 | EP0405468A1 Valve drive mechanism for an engine |
| 01/02/1991 | EP0405383A1 A timing variator, particularly for changing the relative timing between a camshaft and the timing drive mechanism of an internal combustion engine |
| 01/02/1991 | EP0405189A1 Electromagnetic positioning device |
| 01/02/1991 | EP0405156A1 Cup-shaped valve tappet |
| 01/01/1991 | US4981117 Automatic clearance adjuster |
| 12/27/1990 | WO1990015916A1 Valve arrangements and cylinder heads for internal combustion engines |
| 12/27/1990 | EP0404457A1 Method of detecting failure of a valve timing changeover control system of an internal combustion engine |
| 12/27/1990 | EP0404073A1 Control system for internal combustion engine with turbo supercharger |
| 12/25/1990 | US4979475 Rocker arm with rounded channel to engage a valve stem with semi-spherical end |
| 12/25/1990 | US4979474 Camshaft arrangement for multi valve engine |
| 12/20/1990 | DE4019072A1 Coil spring with spring seat for reciprocating components - has seat shaped to receive open-wound end of spring and is inserted between this end and moving component |
| 12/20/1990 | DE4018989A1 Rubbing sliding element for valve mechanism - has ceramic wear surface on heat of metallic intermediate element |
| 12/19/1990 | CN2067756U Hydraulic rocking arm for internal combustion engine |
| 12/18/1990 | USRE33499 Method and apparatus for the control of valve operations in internal combustion engine |
| 12/18/1990 | US4977869 Valve assembly for internal-combustion engines |
| 12/18/1990 | US4977867 Self-adjusting variable duration hydraulic lifter |
| 12/18/1990 | US4977793 Plastic stabilized composite camshaft |
| 12/11/1990 | US4976280 Valve spring compression tool |
| 12/11/1990 | US4976231 Curved intake duct having improved flow characteristics |
| 12/11/1990 | US4976230 Valve mechanism, preferably for an internal combustion engine, having pressure medium supply passage |
| 12/11/1990 | US4976229 Engine camshaft phasing |
| 12/05/1990 | EP0400602A1 An oil pressure lash adjuster of a directly acting type |
| 12/05/1990 | EP0400601A1 An oil pressure rush adjuster of a directly acting type |
| 12/05/1990 | CN2066894U Reciprocating piston petrol engine without cam shaft bush |
| 12/04/1990 | US4974561 Lubrication device for engine |
| 12/04/1990 | US4974560 Mechanism for varying valve duration in an internal combustion engine |
| 12/01/1990 | WO1990015269A1 Variably tuned transmission |
| 12/01/1990 | CA2033197A1 Central vacuum cleaning facility with dual rinsing and flushing |
| 11/28/1990 | EP0399979A2 A combustion engine push rod and a method of manufacturing said push rod |
| 11/28/1990 | EP0399829A2 Method of detecting failure of a valve timing changeover control system of an internal combustion engine |
| 11/28/1990 | EP0399400A1 Process to manufacture a sintered metallic product and product thus obtained |
| 11/28/1990 | EP0399216A1 Internal combustion engine with two cylinder banks in V shape and overhead camshafts |
| 11/28/1990 | EP0228469B1 Method of reestablishment of lever-like parts of curved shape |
| 11/27/1990 | US4972813 Cylinder head and camshaft arrangement for internal combustion engine |
| 11/24/1990 | WO1990015226A1 Hydraulic tappet |
| 11/24/1990 | CA2057025A1 Hydraulic tappet |
| 11/22/1990 | DE4014461A1 Valve drive mechanism for lifting valve in IC engine - has plunger, cam and guide sleeve in which is inlet duct |
| 11/20/1990 | US4971000 Camshaft driving arrangement for double overhead camshaft engine |
| 11/20/1990 | US4970999 Cylinder head for overhead camshaft engine |
| 11/20/1990 | US4970997 Valve operating mechanism for an internal combustion engine |
| 11/14/1990 | EP0397540A1 Camshaft for engine with variable valve timing |
| 11/14/1990 | EP0396676A1 Internal combustion engine. |