Valve timing control system for engine

Details Valve timing control system for engine Valve timing control system for engine

1992-03-30

1993-06-29

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9017, F01L 134

Patent

active

052224651

ABSTRACT:
A valve timing control system for varying a valve timing determines whether an engine operating condition falls within a specific valve timing range established for a specific valve timing or a standard valve timing range, other than the specific valve timing range, established for a standard valve timing. A valve timing device is activated so as to change a valve timing to the standard valve timing when the engine operates in the standard valve timing range. The valve timing device is also deactivated so as to change a valve timing to the specific valve timing when the engine operates in the specific valve timing range.

REFERENCES:
patent: 4716863 (1988-01-01), Pruzan
patent: 4917057 (1990-04-01), Seki
patent: 4942851 (1990-07-01), Kawamura
patent: 5009203 (1991-04-01), Seki
patent: 5042436 (1991-08-01), Yamamoto et al.
patent: 5046461 (1991-09-01), Kanehiro et al.
patent: 5103780 (1992-04-01), Ishii
patent: 5133310 (1992-07-01), Hitomi et al.
patent: 5140955 (1992-08-01), Sono et al.

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