Continuously variable valve timing control system

Details Continuously variable valve timing control system Continuously variable valve timing control system

1991-05-29

1992-12-01

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 464 2, F01L 134

Patent

active

051672065

ABSTRACT:
A continuously variable valve timing control system comprises a camshaft, a timing sprocket, and a helical sleeve disposed between the camshaft and the timing sprocket to provide a drive connection therebetween. The helical sleeve is axially movable between two limit axial positions to vary a phase between the camshaft and timing sprocket. An instantaneous axial position of the helical sleeve is detected. A split, coned sleeve holds a motion sensing rod for restraining the helical sleeve moving in both axial directions when the instantaneous axial position detected reaches a new axial position.

REFERENCES:
patent: 3978829 (1976-09-01), Takahashi et al.
patent: 4535731 (1985-08-01), Banfi
patent: 4811698 (1989-03-01), Akasaka et al.
patent: 4856465 (1989-08-01), Denz et al.
patent: 4895113 (1990-01-01), Speier et al.

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