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.
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