Control mechanism for engine valve timing

Details Control mechanism for engine valve timing Control mechanism for engine valve timing

1992-08-25

1994-03-15

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 464 2, 74568R, F01L 134

Patent

active

052938450

ABSTRACT:
A control mechanism for shifting the rotational phase transmitted from an engine, and for controlling the timing of the intake and exhaust valves. A first gear mechanism integrally rotates with respect to a timing pulley, and has a set of inner peripheral gear teeth. A second gear mechanism integrally rotates with respect to a camshaft, and has a set of outer peripheral gear teeth. The number of gear teeth of the first gear mechanism is greater than that of the second gear mechanism. This gear ratio generates a rotational phase shift of the timing pulley with respect to the camshaft, in order to vary the opening and closing timing of the intake and exhaust valves. A drive means drives the first gear mechanism in order to vary the phase shift and to control the opening and closing timing of the intake and exhaust valves in accordance with the operating state of the engine.

REFERENCES:
patent: 3369418 (1968-02-01), Young
patent: 4305352 (1981-12-01), Oshima et al.
patent: 4716862 (1988-01-01), Sauro
patent: 4955330 (1990-09-01), Fabi et al.
patent: 5080053 (1992-01-01), Parsons
patent: 5174253 (1992-12-01), Yamazaki et al.

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