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With the increase of the number of electronic control units (ECUs), the integrated and smart control system in automobile is required to solve the problem of information exchange, reliability and maintenance. This paper constructed Automobile Smart and Integrated Control System (ASICS) framework with CAN bus, and designed its application layer communication protocol (XMQ J1939) refer to SAE J1939. In order to test the compliance of all ECUs, we developed Compliance Test Computer (CTC), including corresponding software and hardware. Through vehicle test, it concluded that the Automobile Smart and Integrated Control System based on XMQ J1939 work stably, with reliable data communication, favorable real time control and convenient malfunction diagnosis.

This paper investigates the effect of suspension kinematics and compliance (K&C) characteristics on vehicle steering characteristics. The model is built via CarSim and verified by experimental data. Based on our previous research and engineering experience, the suspension K&C characteristics and their characteristic parameters are summarized. Several important characteristic parameters are selected as factors and their levels are made. The orthogonal method is employed for the simulation and analysis. The steady-state circular test, the steering wheel angle step input test, and the steering wheel impulse input test are performed in the simulation. Furthermore, the influence sequence of those characteristic parameters on the understeer, yaw response time and harmonic peak frequency are studied. Finally, the sensitivity of suspension K&C characteristics on the vehicle steering is derived.