Invention Grant
US06990935B2 Pivoting lifter control system using spool valve and check valve to recirculate oil 失效
旋转升降器控制系统使用滑阀和止回阀来再循环油

  • Patent Title: Pivoting lifter control system using spool valve and check valve to recirculate oil
  • Patent Title (中): 旋转升降器控制系统使用滑阀和止回阀来再循环油
  • Application No.: US10968451
    Application Date: 2004-10-19
  • Publication No.: US06990935B2
    Publication Date: 2006-01-31
  • Inventor: Roger T. Simpson
  • Applicant: Roger T. Simpson
  • Applicant Address: US MI Auburn Hills
  • Assignee: BorgWarner Inc.
  • Current Assignee: BorgWarner Inc.
  • Current Assignee Address: US MI Auburn Hills
  • Agency: Brown & Michaels, PC
  • Agent Greg Dziegielewski
  • Main IPC: F01L9/02
  • IPC: F01L9/02
Pivoting lifter control system using spool valve and check valve to recirculate oil
Abstract:
An internal combustion engine that has a camshaft having a plurality of cam lobes, a plurality of valves where each of the valves are actuated by a lifter actuated by the camshaft with a cam lobe. The lifter comprises a lifter body having an upper surface and a lower surface. A cam contact plate pivots on an axis on the upper surface of the lifter body. Opposed hydraulic actuators are present on either side of the axis of the cam contact plate, where each hydraulic actuators comprise a fluid chamber in the lifter body, a piston in the chamber, and a spring biasing the piston into contact with the cam contact plate. The lifter further comprises a line supplying hydraulic fluid to the fluid chambers of the hydraulic actuators and a control valve for controlling fluid flow from one hydraulic actuator to the other hydraulic actuator.
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