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

F - Mech Eng,Light,Heat,Weapons

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F01L 1/34 (2006.01) F01L 1/26 (2006.01) F02D 13/02 (2006.01)

Patent

CA 1326181

ABSTRACT A control method for valve-timing changeover in an engine in which the engine is an electronically controlled fuel injection type. and valve timing for at least each one of intake valves or exhaust valves can be changed over between a low-speed valve timing suitable for a low-speed revolution range of the engine and a high-speed valve timing suitable for a high-speed revolution range of the engine, said method comprising steps of: presetting a high-load determinant reference value calculated in terms of a fuel injection quantity; and changing over the valve timing to the high-speed one when an actual fuel injection quantity exceeds the high-load determinant reference value.

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