System for regulating valve timing of internal combustion engine

Details System for regulating valve timing of internal combustion engine System for regulating valve timing of internal combustion engine

1998-01-26

1999-07-20

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, 12317918, F01L 134

Patent

active

059243953

ABSTRACT:
To start an internal combustion engine at appropriate intake valve close timing. A valve timing regulation system 10 regulates oil pressure supplied to advance chambers and retard chambers formed by a vane 29 and a housing 28 to advance or retard the vane 29 and change the open/close timing of the intake valve. The position of the vane 29 is fixed by inserting a lock pin 43 into an advance-side engagement hole 49A at the most advanced position. Engine stopping is effected so as to set the vane 29 at the middle position, while starting when the coolant temperature is low is effected after rotating the crankshaft backward by a prescribed angle to fix the vane 29 at the most advanced position and is effected when the temperature is high merely by cranking to fix the vane 29 at the most retarded position. Cold starting is easy when effected at the most advanced position because the compression pressure is high, while vibration at warm starting is reduced when starting is effected at the most retarded position because the compression pressure is reduced.

REFERENCES:
patent: 5398502 (1995-03-01), Watanabe
patent: 5517955 (1996-05-01), Yoshioka
patent: 5529034 (1996-06-01), Sone et al.
patent: 5692464 (1997-12-01), Kimura

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