Patent ID: 6263846
Filing Date: 2001-07-24
Classification: F01L,Y10T

Abstract:
An internal combustion engine comprising:a vane phaser (12); andmeans for controlling oscillation of said vane phaser (12), said means for controlling comprising:advance valving means (50) for regulating engine oil pressure to and from said vane phaser (12);retard valving means (60) for regulating engine oil pressure to and from said vane phaser (12);advancing means (44) for communicating engine oil pressure between said advance valving means and said vane phaser (12); andretarding means (46) for communicating engine oil pressure between said retard valving means and said vane phaser (12); andwherein said advance valving means includes a normally-open solenoid control valve (50) comprising:a supply port (52);a control port (56) communicating with said supply port (52) and said advancing means; andan exhaust port (54) communicating with said supply port (52) and said control port (56); andwherein said retard valving means includes a normally-open solenoid control valve (60) comprising:a supply port (62);a control port (66) communicating with said supply port (62) and said retarding means; andan exhaust port (64) communicating with said supply port (62) of said retard valving means and said control port (66) of said retard valving means.