Invention Grant
- Patent Title: Oil pressure modification for variable cam timing
- Patent Title (中): 可变凸轮正时的油压修正
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Application No.: US13353078Application Date: 2012-01-18
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Publication No.: US08714123B2Publication Date: 2014-05-06
- Inventor: John Eric Rollinger , Mohammad Farid , David Karl Bidner
- Applicant: John Eric Rollinger , Mohammad Farid , David Karl Bidner
- Applicant Address: US MI Dearborn
- Assignee: Ford Global Technologies, LLC
- Current Assignee: Ford Global Technologies, LLC
- Current Assignee Address: US MI Dearborn
- Agency: Alleman Hall McCoy Russell & Tuttle LLP
- Agent Julia Voutyras
- Main IPC: F01L1/34
- IPC: F01L1/34 ; G06F17/00

Abstract:
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.
Public/Granted literature
- US20130180480A1 OIL PRESSURE MODIFICATION FOR VARIABLE CAM TIMING Public/Granted day:2013-07-18
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