Valve actuating device, and method for controlling same,申请号US20030381738-传众专利搜索

Valve actuating device, and method for controlling same

申请公布号：US6871618(B2)

申请号：US20030381738

申请日期：2003.08.29

申请公布日期：2005.03.29

申请人：

RENAULT SPORT

发明人：MASSE SERGE

分类号：F01L1/46;F01L9/02;F15B11/08;F15B21/14;(IPC1-7):F01L9/02

主分类号：F01L1/46

摘要：A device and control method for actuating valves of a motor vehicle internal combustion engine including at least a controlled hydraulic actuator actuating the associated valve that is provided in the form of a cylinder. A mobile piston connected to the valve delimits two opposite hydraulic pressure chambers each supplied with an incompressible fluid and pressure regulated by a control unit such that the pressure prevailing in one of the chambers is alternately higher/lower than that which prevails in the other chamber to actuate the valve. Each pressure chamber of the cylinder is capable of communicating with a corresponding actuating hydraulic pressure source, which includes a pneumatic return mechanism for the fluid.