Internal combustion engine control device

Abstract

Provided is a control device for an internal combustion engine for controlling an output torque of the internal combustion engine which drives a vehicle. When the device detects that a torque required by the engine has changed suddenly, a feed forward correction amount is generated for a correction period substantially identical to a resonance cycle of a drive system of the vehicle. The output torque control amount of the engine is corrected by the feed forward correction amount. By accumulating a required torque change amount, the torque change amount accumulation value is calculated and the feed forward correction amount is generated in accordance with the torque change amount accumulation value.

Description

technical field [0001] The present invention relates to a control device for an internal combustion engine driving a vehicle, and more particularly to a control device for suppressing vibration of a vehicle caused by fluctuations in the output torque of the internal combustion engine. Background technique [0002] Patent Document 1 below discloses a throttle control device that suppresses vibration of a vehicle drive system generated when an accelerator pedal is operated by controlling the opening of a throttle valve. According to this device, vibration suppression of the drive system based on inverse filter control and other vibration suppression controls (for example, retardation control of ignition timing) are performed in a manner that does not interfere with each other. Here, the inverse filter control is a control in which the transfer characteristic Gp of the drive shaft torque with respect to the throttle valve opening command value and the target transfer characteri...

AI Technical Summary

Problems solved by technology

Therefore, in order to cope with the situation where vibration suppression control is required and the accelerator opening degree changes rapidly, it is necessary to use a high-performance computing device, which is a major cause of cost increase.

In addition, in the device disclosed in Patent Document 1, there is also a problem that the number of man-hours required for the design of the phase compensator increases.

[0007] In addition, in the device disclosed in Patent Document 2, the differential acceleration DA includes detection hysteresis and calculation hysteresis, so the vibration suppression effect may not be sufficiently obtained.

In addition, the influence of the detection hysteresis and the calculation hysteresis varies depending on the rotation speed of the internal combustion engine, so it is difficult to obtain a good vibration suppression effect in all operating states of the internal combustion engine.

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