Patent number: 7214153
Method of changing the duty cycle frequency of a PWM solenoid on a CAM phaser to increase compliance in a timing drive
Original Assignee: BorgWarner Inc.
Field of technology: Vehicles, Engines and Transportation
Patent granted on: Tue, 08 May 2007
Abstract
A chain drive having a phaser such as a hydraulic vane phaser interposed between a timing chain and a driving or driven shaft is provided. The phaser or the vane are controlled to oscillate more at certain engine speeds to thereby reduce the tensioning force on the chain at the certain engine speeds.