JPS6445964A - Control device for internal combustion engine - Google Patents

Abstract

PURPOSE:To reduce shock when a fuel cut is performed at the time of downhill running by controlling the ignition timing to be delayed in accordance with a delay timing amount, calculated in accordance with the detection value of an engine load, when a fixed speed running device is actuated. CONSTITUTION:In the case of an electronically controlled internal combustion engine equipped with a fixed speed running device, a fixed speed running device operation detecting means A, which detects the fixed speed running device to be on/off turned, is provided. While a load detecting means B, detecting a load of the internal combustion engine, is provided. When the fixed speed running device is detected to be placed in an operative condition, a delay amount of the ignition timing is calculated in accordance with an engine load, detected by the load detecting means B, in a delay timing amount arithmetic means C, in accordance with the calculated delay timing amount, the ignition timing is controlled so as to be delayed by an ignition timing delay angle control means D. Thus controlling generated torque in the internal combustion engine, a step difference of torque, caused by fuel cut, is suppressed.