Modeling and simulation of multi-axle vehicle powertrain system

In order to study the dynamic load characteristics, the multi-axle vehicle powertrain system dynamics simulation model was developed. First, the engine dynamic characteristic model was built by obtaining the cycle fuel injection quantity-rotate speed-torque MAP according to the load characteristic test data and establishing a fuzzy PI controller to adjust the cycle fuel injection quantity. Second, the transmission system was built with modeling of the torque converter, the simplified clutch model, the transfer case, the interaxle differential, the main reducer, the wheel-side reducer, etc. Finally, the multi-axle vehicle powertrain system dynamics simulation model was established in Simulink. The comparison results between simulation and test data show that the model effectively simulates the dynamic load characteristics and the speed characteristics.