Valve timing control mechanism for internal combustion engine

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

1996-05-16

1997-03-18

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, F01L 134

Patent

active

056113048

ABSTRACT:
The rotational phase difference between an engine crankshaft and an engine cam shaft, and a mechanism which controls the difference between the two is controlled using closed-loop feedback. The close-loop feedback has a learning function so that the rotational phase difference between the crankshaft and the cam shaft converges on a target value. The learning process uses retaining outputs based on the engine operational state to compensate the degree of actuation of the rotational phase adjusting mechanism with the value thus learned. The deviation relative to the retaining output from a map based on a variation speed at each rotational phase difference, and this deviation is added to a delay output of the feedback loop at each iteration.

REFERENCES:
patent: 4811698 (1989-03-01), Akasaka et al.
patent: 4856465 (1989-08-01), Denz et al.
patent: 4928640 (1990-05-01), Van Vuuren et al.
patent: 5333577 (1994-08-01), Shinojima
patent: 5363817 (1994-11-01), Ikeda et al.

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