Electronic throttle control system and method for exhaust gas turbocharged engine

Abstract

The invention discloses a control system of an electronic throttle valve of an exhaust gas turbocharged engine. The control system of the electronic throttle valve of the exhaust gas turbocharged engine is characterized by comprising a throttle valve controller, the throttle valve controller has a throttle valve normal control mode, a throttle valve full-open control mode and a throttle valve anti-overshoot control mode, wherein the effective area of the throttle valve is the effective area of a target throttle valve under the throttle valve normal control mode; the effective area of the throttle valve is the maximum opening area of the target throttle valve under the throttle valve full-opening control mode, and the change rate of the effective area of the target throttle valve is the maximum change rate allowed by the throttle valve when the throttle valve is fully opened; and the effective area of the throttle valve is the corrected value of the effective area of the target throttlevalve under the throttle valve anti-overshoot control mode. According to the control system and method of the electronic throttle valve of the exhaust gas turbocharged engine, the stability of the target air inlet pressure in an air inlet system is ensured, so that the stability of the dynamic property of a vehicle is ensured.

Description

technical field [0001] The invention belongs to the technical field of automobile engine control, and in particular relates to a control method system and method for an electronic throttle of an exhaust gas turbocharged engine. [0002] technical background [0003] Turbocharging is the most widely used supercharging method on vehicle engines at present. Turbocharged engines have become the main way for major automobile companies to improve energy conservation and emission reduction. Exhaust gas turbocharging means that the exhaust gas with a certain amount of energy discharged from the engine enters the turbine and expands to do work. The power of the exhaust gas turbine is used to drive the working impeller of the compressor that rotates coaxially with the turbine, and the fresh air is compressed in the compressor and then sent to the cylinder. [0004] The intake air volume control of the engine needs to be controlled by adjusting the electronic throttle valve and the sup...

AI Technical Summary

Problems solved by technology

Due to the differences and complexity of each component, it is necessary to ensure efficient, stable and fast response to torque requests while protecting the life of components, which brings challenges and difficulties to the requirements of the control system

[0005] The control of the throttle in the prior art calculates the target throttle opening directly according to the target intake pressure. Difficulty in coordinating control of valve and boost control

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