This paper briefly presents a Parallel Serial Hybrid Electric Vehicle structure combined with NAC institute, constructing a CAN Communication Network of Hybrid Electric Vehicle’s Powertrain and also defining the Communication protocol of the control Network. The Network constructed is tested on bench and prototype vehicle and by using CANstress, CANoe and some other Automotive network development tools, actual test and performance analysis have been conducted. The experiment result illustrates that the control network system arrives a high stable performance and real-time with low bus load and little error frames under high transmission speed and interference environment, and can meet requirement of HEV Powertrain of stability, real-time and accurate control. Besides that, we also constructs a Diagnostic Network, which fulfills the unified diagnostic services (UDS) defined by ISO14229.

Stochastic theory and probabilistic perturbation are introduced in this paper. According to the instantaneous speed and maximum braking force, the vehicle braking performence evaulation is established, in which the uncertainty of stochastic parameters are analysed. Compared with that of Monte-Carlo’s, the result shows that the accuracy of the braking performance is improved.