Control apparatus and control method of variable valve timing st

Details Control apparatus and control method of variable valve timing st Control apparatus and control method of variable valve timing st

1998-06-05

2000-03-07

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, F02D 1300

Patent

active

060326239

ABSTRACT:
In a hydraulic type variable valve timing structure having a construction for changing a phase of a cam shaft by controlling the current provided to a linear solenoid valve, and a change of said rotational phase corresponding to the increase of said current is limited by a stopper, a maximum current is provided for a predetermined time to the linear solenoid valve when a target value of the rotational phase is switched to the rotational phase being limited by the stopper, and thereafter, the current is lowered and maintained in the range where the rotational phase being limited by the stopper can be maintained.

REFERENCES:
patent: 5271360 (1993-12-01), Kano et al.
patent: 5562071 (1996-10-01), Urushihata et al.
patent: 5611304 (1997-03-01), Shinojima

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