Abstract
To research the hybrid powertrain vehicle, a forward-facing model is built in this paper. Based on the modeling method of experimental data, the model of throttle percentage and the torque of the engine is built, and the relation model of fuel consumption and emissions is given. Considering the Integrated Starter Generator (ISG) and its controller, the relation model of voltage, temperature, torque and current is established. According to the vector superposition principle of the engine and ISG torque, the model of dynamic coupling is also built. Considering the various external force along the driving direction of the vehicle, the running equation is given. Aim to a single-shaft parallel hybrid vehicle, the simulation of whole vehicle and the semi-physical simulation of ISG drive system are presented in this paper. Results show that the simulations are rational, and the fuel economy of the vehicle is enhanced efficiently.
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