Apparatus and method for controlling valve timing of engine

Details Apparatus and method for controlling valve timing of engine Apparatus and method for controlling valve timing of engine

1998-01-05

1999-08-17

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, 123 9031, F01L 1300

Patent

active

059378050

ABSTRACT:
In an apparatus for variably controlling valve timing of engine by generating, between a crankshaft and a cam shaft, a phase difference which periodically varies in a manner synchronized with a rotational phase of the cam shaft: actual phase differences are obtained at two discrete rotational phases of the cam shaft, respectively; there is assumingly calculated an amount of deviation (phase deviation .theta.) of phase difference relative to the rotational phase of the cam shaft; and the phase difference is feedback controlled based on that value of the detected phase difference which is corrected in accordance with the amount of deviation (phase deviation .theta.).

REFERENCES:
patent: 4928640 (1990-05-01), van Vuuren et al.
patent: 5363817 (1994-11-01), Ikeda et al.
patent: 5417187 (1995-05-01), Meyer et al.
patent: 5462022 (1995-10-01), Ushida
patent: 5522352 (1996-06-01), Adachi et al.
patent: 5553573 (1996-09-01), Hara et al
patent: 5636603 (1997-06-01), Nakamura et al.
Patent Abstract of Japan 07019073, Jan. 20,1995.

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