Engine control device

Abstract

The invention refers to an engine control device which can restrain torque impact of an engine and meanwhile can raise a fuel consumption rate. The engine control device includes a required torque calculating unit (3) for calculating a required torque required by an engine (1), and a delay torque calculating unit (4) for calculating a delay torque which performs delay process on a required torque. In addition, the engine control device also includes an ignition control unit (6) for controlling an ignition timing of an engine (10) according to the delay torque. The delay torque calculating unit (4) uses a time constant with given response faster than air suction response delay of the engine (10).

Description

technical field [0001] The present invention relates to an engine control device that controls ignition timing upon return from a fuel cut state and a torque down state. Background technique [0002] Conventionally, a fuel cut control that temporarily cuts off fuel supply to an engine is known as one of controls aimed at improving vehicle fuel consumption and purifying exhaust gas. The fuel cut control refers to controlling the fuel injection amount at the time of deceleration of the vehicle to be zero or close to zero. The fuel cut control is executed, for example, when the accelerator pedal is not depressed and the engine is braked, that is, when the drive wheels are braked by rotational resistance of the engine. On the other hand, when the accelerator pedal is depressed and the engine speed drops to a lower speed range while the fuel cut control is in effect, the fuel cut control ends. At this time, the fuel supply to the engine is resumed, and the engine output corresp...

AI Technical Summary

Problems solved by technology

Especially immediately after the accelerator pedal is pressed to end the fuel cut control, the engine output power corresponding to the accelerator operation amount is required, and torque shock is likely to occur.

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