An engine intake flow online calibration method based on a speed density model

• Main Authors: HU YUNFENG, GAO JINWU, CHEN HONG, SUN BOQI
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses an engine intake flow online calibration method based on a speed density model. An air flow signal at a throttle valve is collected through a sensor; Intake pressure signal, anair inlet temperature signal and an engine rotating speed signal; According to a speed density model, a time-varying parameter identification method is utilized to identify model time-varying parameters, then a parameter Map graph is automatically generated by utilizing a Map learning algorithm, finally current working condition model parameters can be inquired through an interpolation method, and the air inlet pressure, the rotating speed and the temperature are substituted into the model together, so that the air inlet flow can be calculated. According to the invention, the on-line rapid automatic calibration of the air inlet flow of different types of engines can be realized only by enabling the engine to operate under all working conditions. 本发明公开了一种基于速度密度模型的发动机进气流量在线标定方法，通过传感器采集节气门处空气流量信号、进气压力信号、进气温度信号和发动机转速