Engine control device

Abstract

The invention provides an engine control device. Switching of operation modes from whole-cylinder operation to cylinder reducing operation and torque reduction based on turning operation are considered simultaneously, occurrence of flameout is restrained and the engine is controlled so vehicle behaviors meeting driver intensions are achieved. A PCM (50) comprises a basic target torque-deciding part (51) for deciding a basic target torque, based on a driving state of a vehicle including an accelerator pedal operation state, a torque reduction amount-deciding part (53) for deciding a torque reduction amount, based on a driving state of the vehicle other than the accelerator pedal operation state, a final target torque-deciding part (55) for deciding a final target torque, based on the decided basic target torque and the decided torque reduction amount, and an engine output control part (57) for controlling an engine (10) to cause the engine to output the decided final target torque, wherein the engine output control part is operable to prohibit switching of an operation mode of the engine from being performed simultaneously with control of the engine according to a change in the final target torque corresponding to a change in the torque reduction amount.

Description

technical field [0001] The present invention relates to a control device for an engine, and more particularly, to a control device for an engine that controls an engine based on an operating state of a vehicle. The ignition device control unit that controls the ignition timing of the ignition device installed in each cylinder. The engine can switch the operation mode between full-cylinder operation and reduced-cylinder operation. The full-cylinder operation refers to the implementation of air-fuel mixture in all cylinders The reduced-cylinder operation refers to stopping the combustion of the air-fuel mixture in some of the cylinders. Background technique [0002] Conventionally, when the behavior of the vehicle becomes unstable due to skidding or the like, the behavior of the vehicle is controlled in a safe direction (slip prevention device, etc.). Specifically, when the vehicle is turning or the like, it is detected whether the vehicle is understeering or oversteering, an...

AI Technical Summary

Problems solved by technology

[0010] In the above-mentioned multi-cylinder engine, the vehicle behavior control device described in the above-mentioned Patent Document 2 reduces the torque instantaneously in response to the driver's steering operation, thereby changing from the full-cylinder operation to the reduced-cylinder operation. When the operation mode is switched, the vehicle behavior control device delays the ignition timing in order to reduce the torque, and the delay of the ignition timing caused by the preparatory control before the operation mode switching from the full-cylinder operation to the reduced-cylinder operation may cause Simultaneously, an unintentional flameout may occur

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