Intake- and/or exhaust-valve timing control system for internal

Details Intake- and/or exhaust-valve timing control system for internal Intake- and/or exhaust-valve timing control system for internal

1991-11-14

1993-04-27

Okonsky, David A.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9031, 464 2, F01L 134

Patent

active

052052486

ABSTRACT:
An intake- and/or exhaust-valve timing control system for an internal combustion engine comprises a ring gear disposed between a rotating member having a driven connection with an engine crankshaft and a camshaft for changing a relative phase angle between the rotating member and the camshaft so as to control intake- and/or exhaust-valve timing of the engine depending on the operating state of the engine. The valve control system includes at least one pair of friction surfaces for creating friction torque between the rotating member and the camshaft so as to suppress a rapid change in relative rotational speed of the camshaft to the rotating member, and a spring for biasing one of the frictional surfaces to the other.

REFERENCES:
patent: 4231330 (1980-11-01), Garcea
patent: 4754727 (1988-07-01), Hampton
patent: 4960084 (1990-10-01), Akasaka et al.
patent: 5067450 (1991-11-01), Kano et al.

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