Internal combustion engine control device and internal combustion engine control method

Abstract

The present invention provides an internal combustion engine control device and an internal combustion engine control method, which can not only realize reliable fully closed operation of WGV, but also enable the WGV to operate to prevent it from colliding with the fully closed position at high speed, and can prevent the WGA drive current from becoming Too large, causing the motor to overheat abnormally. It includes a controller (50), which detects the operating status of the internal combustion engine based on the detection results of the sensor group, and drives an actuator that changes the opening position of the exhaust gas valve based on the operating status. The controller controls the exhaust gas. When the valve is driven to the fully closed opening, the actuator is temporarily driven to the preset assumed fully closed opening. After it is determined based on the detection result of the position sensor that the actual opening of the waste gas valve reaches the assumed fully closed opening. , switches the target opening to the fully closed opening and drives the actuator.

Description

technical field [0001] The present invention relates to a control device of an internal combustion engine including a turbocharger and a control method of the internal combustion engine, and is particularly related to the control of exhaust bypass valves such as waste gas valves. Background technique [0002] Conventionally, for the purpose of increasing the output of an internal combustion engine (hereinafter referred to as an engine), a turbocharger equipped with a supercharger that operates by rotating a turbine using exhaust gas is known. [0003] In a turbocharger like this, when the engine is operated at high rotation and high load, there is a possibility that the boost pressure increases excessively and the engine may be damaged. Therefore, generally, an exhaust bypass passage is provided in parallel with the turbine. [0004] In addition, in such a control device for an internal combustion engine equipped with a turbocharger and an exhaust bypass, a part of the exha...

AI Technical Summary

Problems solved by technology

[0011] Therefore, even when the WGA is operated with the same amount of operation, the WGV opening degree may deviate, and the WGV cannot be controlled to a desired opening and closing state.

In addition, the supercharging pressure may not reach the control target value, or the control may cause the WGV to move further from the fully closed state to the closed side, causing the drive current of the WGA to become an overcurrent.

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