Design of Smart Drive for Heavy-duty Gas Engine Injection System
Shi Jie;Wu Changshui;Dong Zhe;Li Fubin;School of Automotive Engineering, Shanghai University of Engineering Science;
To satisfy the requirement of solenoid valve drive in heavy-duty gas engine, a set of intelligent control system of solenoid valve was designed based on MC33816. The minimum system circuit of MCU and gas injection drive circuit were designed. Besides, the appropriate drives were written. This system adopted the method of three-stage current drive. Through ASA-33816-STD simulation along with the opening and closing experiments of solenoid valve, a group of optimal parameters were obtained. The driving current of the first stage is 20.3 A, the current of the second stage is 13 A, and the holding current is 5 A. Through the minimum incentive test, the total opening time of the solenoid valve is 1.2 ms, and the stability of the system is verified by the test of durable temperature rise, and the maximum operating temperature of the system is 47 ℃. The experimental results show that the driving module can meet the requirement of practical application in engineering.