发明申请
- 专利标题: Hydraulic valve actuator for acturing a gas-exchange valve
- 专利标题(中): 用于激活气体交换阀的液压阀致动器
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申请号: US10493858申请日: 2003-03-05
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公开(公告)号: US20050028763A1公开(公告)日: 2005-02-10
- 发明人: Udo Diehl , Uwe Hammer , Karsten Mischker
- 申请人: Udo Diehl , Uwe Hammer , Karsten Mischker
- 优先权: DE10239747.3 20020829
- 国际申请: PCT/DE03/00699 WO 20030305
- 主分类号: F01L9/02
- IPC分类号: F01L9/02 ; F01L1/34
摘要:
An hydraulic valve actuator for actuating a gas-exchange valve in a combustion cylinder of an internal combustion engine has an operating piston delimiting two pressure chambers, of which the lower pressure chamber acting in the valve-closing direction is permanently charged with fluid pressure via which an intake and return line can be charged by, or relieved of, fluid pressure. To brake the gas-exchange valve in the final phase of the closing procedure to reduce the set-down speed, the return line of the upper pressure chamber is split between two discharge openings, which are connected to one another and arranged in the housing with axial clearance, the upper discharge opening being coupled to a restrictor and the lower discharge opening being displaceable relative to the operating piston and disposed in its displacement path such that it may be closed thereby at a defined distance, prior to reaching its upper limit position.
公开/授权文献
- US07007642B2 Hydraulic valve actuator for actuating a gas-exchange valve 公开/授权日:2006-03-07