Valve timing control device for internal combustion engine

Details Valve timing control device for internal combustion engine Valve timing control device for internal combustion engine

1990-11-29

1991-10-15

Wolfe, Willis R.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 123420, 123501, 464 77, F01L 134

Patent

active

050564790

ABSTRACT:
A valve timing control device includes a pair of clutches designed for restricting relative phase shift between an engine revolution synchronous rotary member and a camshaft. One of the pair of clutches restricts phase shift between the rotary member and the camshaft in valve timing advancing direction, and the other restricts relative phase shift between the rotary member and the camshaft in valve timing retarding direction. The pair of clutches are associated with a hydraulic means which is responsive to the engine driving condition and selectively make active one of the clutches.

REFERENCES:
patent: 3262435 (1966-07-01), Cribbs
patent: 3482559 (1969-12-01), Salomon
patent: 4359985 (1982-11-01), Mueller
patent: 4509490 (1985-04-01), Morin
patent: 4841924 (1989-06-01), Hampton et al.

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