Control method and control device for turbocharging air circulation valve of engine

Abstract

The invention discloses a control method for a turbocharging air circulation valve of an engine. The control method comprises the steps that a first current operating condition of the engine is obtained; the turbocharging air circulation valve is controlled to be opened according to the first current operating condition; a first actual supercharge pressure value change rate of the engine is obtained; the turbocharging air circulation valve is controlled to be closed according to the first actual supercharge pressure value change rate; a first throttle percentage change rate and a first air inlet flow change rate of the engine are obtained; the turbocharging air circulation valve is controlled to be opened according to the first throttle percentage change rate and the first air inlet flow change rate; a second current operating condition of the engine is obtained; and the turbocharging air circulation valve is controlled to be closed according to the second current operating condition. By the adoption of the control method for the turbocharging air circulation valve of the engine, rapid decrement of the output torque of the engine and intermittent discomfort of a whole vehicle caused by surging noise of an air inlet pipeline can be effectively restrained, and the driving comfort of the whole vehicle is greatly optimized. The invention further discloses a control device for the turbocharging air circulation valve of the engine.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a method for controlling a turbocharged air circulation valve of an engine and a control device for a turbocharged air circulation valve of an engine. Background technique [0002] In the vehicle engine control matching process, when the driving demand torque drops sharply (such as loosening the accelerator), the engine output torque needs to quickly follow the change of the demand torque, so as to control the output torque to drop at a certain rate until it enters coasting and dragging backwards, so that the whole The car decelerates and coasts according to the driver's demand. However, a vehicle using a turbocharged engine needs to do more control actions at the moment of output torque change than a vehicle using a conventional engine, so as to achieve the purpose of protecting the structure of the turbocharger and the intake pipe, such as turning off the turbocharger. The pr...

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Problems solved by technology

[0005] However, the opening of the turbocharged air circulation valve will cause the air pressure of the intake pipe to drop sharply. At this time, only through technical solutions such as adjusting the engine ignition advance angle or delaying the closing of the throttle valve in the related art, the overall operating point of some engines It is difficult to optimize the frustration of the vehicle to an acceptable level for the driver and passengers, especially when the turbocharger air circulation valve is turned on when the turbocharger has already exerted its supercharging effect to a large extent, the frustration of the whole vehicle will be more intense

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