发明授权
- 专利标题: Oil pressure modification for variable cam timing
- 专利标题(中): 可变凸轮正时的油压修正
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申请号: US13353078申请日: 2012-01-18
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公开(公告)号: US08714123B2公开(公告)日: 2014-05-06
- 发明人: John Eric Rollinger , Mohammad Farid , David Karl Bidner
- 申请人: John Eric Rollinger , Mohammad Farid , David Karl Bidner
- 申请人地址: US MI Dearborn
- 专利权人: Ford Global Technologies, LLC
- 当前专利权人: Ford Global Technologies, LLC
- 当前专利权人地址: US MI Dearborn
- 代理机构: Alleman Hall McCoy Russell & Tuttle LLP
- 代理商 Julia Voutyras
- 主分类号: F01L1/34
- IPC分类号: F01L1/34 ; G06F17/00
摘要:
Systems and methods for modifying oil pressure for a variable cam timing system are provided. In one example approach, a method comprises, in response to an operating condition, adjusting a valve coupled to a hydraulic variable camshaft timing actuator to initiate camshaft phasing and adjusting an oil pressure supplied to the valve based on a camshaft phaser position. If a camshaft phaser locking pin is in a home position, the method may further comprise reducing the oil pressure supplied to the valve for a predetermined time interval to a threshold amount to unlock the locking pin but not move the camshaft phaser and then increasing the oil pressure supplied to the valve to move the camshaft phaser.
公开/授权文献
- US20130180480A1 OIL PRESSURE MODIFICATION FOR VARIABLE CAM TIMING 公开/授权日:2013-07-18