Control device for automobile engine including a valve system which opens and closes intake and exhaust valves by reciprocative force of crankshaft

摘要

PCT No. PCT/JP93/00232 Sec. 371 Date Mar. 23, 1994 Sec. 102(e) Date Mar. 23, 1994 PCT Filed Feb. 25, 1993 PCT Pub. No. WO93/17230 PCT Pub. Date Sep. 2, 1993.A control device includes a valve system which can selectively operate at least one of an intake and exhaust valves of an automobile engine by means low speed cams 12 or high speed cams 13. It further includes an engine speed detecting device; and operation mode determining device for determining whether the engine is in a low or high speed operation mode based on engine speed data, and for producing a signal indicative of a current operation mode. The control device varies a fuel supply suspending engine speed for each operation mode based on the signal from the operation mode determining device, and issues a fuel-supply suspending command when the current engine speed is above the fuel supply suspending engine speed. An optimum fuel supply suspending engine speed is set for each engine operation mode, so that the valve system can operate reliably even when operation mass applied thereto varies.