Supercharger execution control structure and control method thereof

Abstract

The invention discloses a supercharger execution control structure, which comprises a control unit and a supercharger waste gas vent valve, as well as an electric actuator, wherein the supercharger waste gas vent valve consists of a supercharger waste gas vent valve seat and a waste gas vent valve which are matched with each other, the control unit is connected with the electric actuator through a wiring harness, the waste gas vent valve is connected with the electric actuator through a pull bar. A supercharger execution control method comprises the following control steps: calculating the power of a gas compressor by the control unit according to the required supercharged pressure, and then converting into the power of a turbine according to the energy balance principle, thus being capable of acquiring required waste gas energy; calculating the openness of the waste gas vent valve according to the quantity of the required waste gas energy, and outputting a control command to the electric actuator through the control unit; and executing actions by the electric actuator to drive the pull bar to achieve the required openness value of the waste gas vent valve. The supercharging pressure control precision can be enhanced, and the response speed of the supercharger can be increased.

Description

technical field [0001] The invention relates to the technical field of engine turbocharging, in particular to a supercharger execution control structure and a control method thereof. Background technique [0002] The existing supercharger actuator control method, one is to convert the required pressure into the duty cycle of the three-way solenoid valve, and control the pressure inside the pneumatic mold box through the duty cycle to control the opening of the air release valve and then control The supercharging pressure meets the demand pressure, and the precise control of the supercharging pressure cannot be realized, and the error is relatively large; the other is to calculate the required power of the compressor according to the demand pressure by calculating the size of the demand pressure, and calculate the power of the turbine through efficiency conversion. Calculating the demanded waste gas valve opening through the turbine power, but this opening model requires an e...

AI Technical Summary

Problems solved by technology

[0002] The existing supercharger actuator control method, one is to convert the required pressure into the duty cycle of the three-way solenoid valve, and control the pressure inside the pneumatic mold box through the duty cycle to control the opening of the air release valve and then control The supercharging pressure meets the demand pressure, and the precise control of the supercharging pressure cannot be realized, and the error is relatively large; the other is to calculate the required power of the compressor according to the demand pressure by calculating the size of the demand pressure, and calculate the power of the turbine through efficiency conversion. Calculating the demanded waste gas valve opening through the turbine power, but this opening model requires an external sensor for accurate calibration. The demanded opening is calculated through the model and then converted into the duty cycle of the three-way solenoid valve, and then converted into the pressure of the control mold box Then control the boost pressure to meet the demand pressure, the actuator does not have a position sensor, the required actuator opening can only be calculated through a mathematical model, and there are also errors in precision control, which affect the control accuracy

Images