Control method for valve-timing changeover in engine

Details Control method for valve-timing changeover in engine Control method for valve-timing changeover in engine

1989-08-01

1990-04-17

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

F01L 134

Patent

active

049170570

ABSTRACT:
A control method for a valve-timing changeover in an engine having a valve operating mechanism capable of operating the intake valves or exhaust valves, or both, in a different manner, known as valve timing, such as the magnitude of valve lift or the duration the valve remains open, for improving the operation of the engine at different engine speeds. The control method uses a high-load determinant reference valve established experimentally based on engine revolution speed and calculated in terms of fuel injection quantity to cause the changeover to high-speed valve-timing to occur under high-load conditions when the actual fuel injection quantity being supplied at that engine revolution speed exceeds the high-load determinant reference value.

REFERENCES:
patent: 4033304 (1977-07-01), Luria
patent: 4200067 (1980-04-01), Trenne
patent: 4534323 (1985-08-01), Kato et al.
patent: 4759322 (1988-07-01), Konno
patent: 4800850 (1989-01-01), Yoshida et al.
patent: 4807574 (1989-02-01), Shibata et al.

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