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Class Information
Number: 123/90.12
Name: Internal-combustion engines > Poppet valve operating mechanism > Hydraulic system
Description: Device wherein a liquid under pressure provides an essential link in the valve operating mechanism for at least one direction of movement of the valve.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7617806 |
Valve drive of an internal combustion engine |
Nov. 17, 2009 |
| 7610881 |
Apparatus for an internal combustion engine |
Nov. 3, 2009 |
| 7594485 |
Valve actuation system for internal combustion engine |
Sep. 29, 2009 |
| 7594488 |
Cylinder head cover and method for mounting cylinder head cover to cylinder head |
Sep. 29, 2009 |
| 7591237 |
Electromechanical variable valve actuator with a spring controller |
Sep. 22, 2009 |
| 7559300 |
Multiple slave piston valve actuation system |
Jul. 14, 2009 |
| 7555998 |
System and method for hydraulic valve actuation |
Jul. 7, 2009 |
| 7556027 |
Internal-combustion engine control method and engine using same |
Jul. 7, 2009 |
| 7555999 |
Cold temperature operation for added motion valve system |
Jul. 7, 2009 |
| 7552704 |
Procedure to operate an internal combustion engine with an electrohydraulic valve control |
Jun. 30, 2009 |
| 7549405 |
Oil filter having an integral metering orifice for a valve lifter oil manifold assembly |
Jun. 23, 2009 |
| 7546821 |
Hydraulic actuation system for improved engine start |
Jun. 16, 2009 |
| 7546824 |
Variable valve timing mechanism-equipped engine |
Jun. 16, 2009 |
| 7536984 |
Variable valve actuator with a pneumatic booster |
May. 26, 2009 |
| 7513226 |
Hydraulic control system for a switching valve train |
Apr. 7, 2009 |
| 7506621 |
Valve timing control system |
Mar. 24, 2009 |
| 7506622 |
Valve timing control system |
Mar. 24, 2009 |
| 7503115 |
Electromagnetic hydraulic valve, in particular a proportional valve for controlling a device for adjusting the rotation angle of a camshaft relative to the crankshaft in an internal combustion |
Mar. 17, 2009 |
| 7503296 |
Cylinder deactivation apparatus |
Mar. 17, 2009 |
| 7500466 |
Variable valve actuation and engine braking |
Mar. 10, 2009 |
| 7484483 |
System and method for variable valve actuation in an internal combustion engine |
Feb. 3, 2009 |
| 7484497 |
Control device for an internal combustion engine |
Feb. 3, 2009 |
| 7481192 |
Valve gear and method for opening and closing a passage |
Jan. 27, 2009 |
| 7475658 |
Electrohydraulic control module |
Jan. 13, 2009 |
| 7472669 |
Method of generating pressure pulses, a pressure pulse generator and a piston engine provided therewith |
Jan. 6, 2009 |
| 7464675 |
Operating an air-hybrid vehicle with camshaft-driven engine valves |
Dec. 16, 2008 |
| 7455040 |
Hydraulic circuit for switchable cam followers |
Nov. 25, 2008 |
| 7438031 |
Layout structure of hydraulic control valve for valve train in internal combustion engine |
Oct. 21, 2008 |
| 7426912 |
Oil supply circuit for cylinder deactivation system |
Sep. 23, 2008 |
| 7421987 |
Variable valve actuator with latch at one end |
Sep. 9, 2008 |
| 7421993 |
Variable valve lift apparatus |
Sep. 9, 2008 |
| 7409937 |
Hydraulic control system for internal combustion engine |
Aug. 12, 2008 |
| 7404382 |
Variable engine valve control system with pressure difference |
Jul. 29, 2008 |
| 7395802 |
Oil supply for internal combustion engine camshaft |
Jul. 8, 2008 |
| 7392777 |
Variable valve train of an internal combustion engine |
Jul. 1, 2008 |
| 7392772 |
Primary and offset actuator rocker arms for engine valve actuation |
Jul. 1, 2008 |
| 7387095 |
Hydraulic valve actuation systems and methods to provide variable lift for one or more engine air valves |
Jun. 17, 2008 |
| 7387097 |
INA-schaeffler KG, industriestrasse 1-3, 91074 herzogenaurach ANR 12 88 48 20 |
Jun. 17, 2008 |
| RE40381 |
Multi-cylinder diesel engine with variably actuated valves |
Jun. 17, 2008 |
| 7380528 |
Method for operating a hydraulic actuator, especially a gas exchange valve of an internal combustion engine |
Jun. 3, 2008 |
| 7370615 |
Variable valve actuator |
May. 13, 2008 |
| 7360517 |
Valve actuator for actuating a gas exchange valve of an internal combustion engine |
Apr. 22, 2008 |
| 7357105 |
Hydraulic valve driving device and engine including the same and vehicle |
Apr. 15, 2008 |
| 7350491 |
Lash adjuster and valve system |
Apr. 1, 2008 |
| 7347171 |
Engine valve actuator providing Miller cycle benefits |
Mar. 25, 2008 |
| 7347172 |
Hydraulic valve actuation system with valve lash adjustment |
Mar. 25, 2008 |
| 7343886 |
Internal combustion engine control apparatus |
Mar. 18, 2008 |
| 7341028 |
Hydraulic valve actuation systems and methods to provide multiple lifts for one or more engine air valves |
Mar. 11, 2008 |
| 7341033 |
Cylinder head cover |
Mar. 11, 2008 |
| 7331316 |
Control apparatus and control method for internal combustion engine |
Feb. 19, 2008 |
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