Research on double-parameter efficiency shift schedule of vehicle powertrain system

摘要

The research purpose is to deal with low efficiency of hydraulic transmission system. Vehicle powertrain system was built by applying SimDriveline module. The fundamental schedule of efficiency shift was introduced. A double-parameter fuzzy controller was designed to realize automatic shift. Finally, the simulation model of double-parameter efficiency shift was established in order to verify the correctness of efficiency shift based on fuzzy control. The simulation results indicate that, according to the changing of load,the vehicle can complete automatic shift whether in starting condition, operating condition or climbing condition. The hydraulic torque converter can constantly work in high efficient area, which demonstrates the feasibility of the designed fuzzy controller.