A hybrid disturbance rejection control solution for variable valve timing system of gasoline engines.
A novel solution for electro-hydraulic variable valve timing (VVT) system of gasoline engines is proposed, based on the concept of active disturbance rejection control (ADRC). Disturbances, such as oil pressure and engine speed variations, are all estimated and mitigated in real-time. A feed-forward controller was added to enhance the performance of the system based on a simple and static first principle model, forming a hybrid disturbance rejection control (HDRC) strategy. HDRC was validated by experimentation and compared with an existing manually tuned proportional-integral (PI) controller. The results show that HDRC provided a faster response and better tolerance of engine speed and oil pressure variations.
State Key Laboratory of Engines, Tianjin University, Weijin Road 92, Nankai District, Tianjin 300072, PR China. Electronic address: xiehui@tju.edu.cn.
Hui
H
Xie
State Key Laboratory of Engines, Tianjin University, Weijin Road 92, Nankai District, Tianjin 300072, PR China. Electronic address: songkangtju@tju.edu.cn.
Kang
K
Song
State Key Laboratory of Engines, Tianjin University, Weijin Road 92, Nankai District, Tianjin 300072, PR China. Electronic address: Heyu@tju.edu.cn.
Yu
Y
He
Active disturbance rejection control; Feed-forward control; Variable valve timing control