Research on control strategy and integrated power-train system as shifting progress

Based on BF6M1015CP electronic diesel engine (it is a supercharged, water-cooled engine. It has 6 cylinders and it is for heavy-duty vehicle) and HD4070PR electronic automatic transmission (it covers heavy-duty applications requiring high input horsepower and torque. It contains torque converter module, control module, planetary module and output module. It has 7 forward gears and a power-take —off (PTO) and a retarder), the paper analyzes the shift system of an electronic automatic transmission. To improve the shift quality, in the paper the different control methods in different phases are used and reviewed that include the open-loop control, fixed ramp rate, and closed-loop control. According to using CAN bus, it’s not only feasible to use CAN network following SAE J1939 standard, but also can meet the requirements of the communication control in the vehicular integrated power-train control system. At last, through a bench test, the control strategy and integrated power-train control system of shifting process of the engine and electronic automatic transmission were obtained. Finally, though a bench test, the control strategy of the electronic automatic transmission was obtained.