Variable valve timing mechanism

Details Variable valve timing mechanism Variable valve timing mechanism

1998-04-02

1999-11-30

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9015, F01L 1300

Patent

active

059923610

ABSTRACT:
In a variable timing mechanism, valve lifting characteristics are changed to meet the engine power output characteristics when the timing of valve operation is changed. The variable timing mechanism is provided for the side of at least one of an intake and an exhaust valve so that, when a running condition of an internal combustion engine is changed from a low engine speed to a high engine speed, a duration of valve opening of at least one of the intake and the exhaust valve is changed to increase an overlap period of the intake and the exhaust valve at the beginning of the changes in the running condition of the engine.

REFERENCES:
patent: 5622144 (1997-04-01), Nakamura et al.
patent: 5636603 (1997-06-01), Nakamura et al.
patent: 5645020 (1997-07-01), Yamada
patent: 5687681 (1997-11-01), Hara
patent: 5709179 (1998-01-01), Hara et al.

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