基于自适应带宽的增压LP-EGR发动机空燃比预测抗扰控制方法
By establishing an adaptive bandwidth air-fuel ratio prediction and disturbance rejection control method, the problems of exhaust delay and multiple disturbances in air-fuel ratio control in turbocharged LP-EGR gasoline engines are solved, achieving high-precision and low-computation air-fuel ratio control.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANJIN UNIV
- Filing Date
- 2023-09-05
- Publication Date
- 2026-07-17
AI Technical Summary
In turbocharged LP-EGR gasoline engines, air-fuel ratio control faces challenges such as exhaust delay, air system complexity, and multiple disturbances. Existing control methods struggle to achieve high-precision and low-computation air-fuel ratio control.
An adaptive bandwidth-based air-fuel ratio prediction and disturbance rejection control method for turbocharged LP-EGR engines is adopted. By establishing an empirical-mechanism-based intake volume model and EGR flow model, and combining a disturbance observer, a Smith predictor, and a feedback control module, an adaptive ESO is designed to achieve precise control of the air-fuel ratio.
It reduces the workload of gas volume estimation calibration, improves the estimation effect under transient and small pressure difference conditions, eliminates the influence of system delay, enhances anti-interference ability, and improves the accuracy and response speed of air-fuel ratio control.
Smart Images
Figure CN117145642B_ABST