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This paper describes the preliminary development of an on-board integration network for vehicle dynamics. The underlying philosophy is explained and the basic requirements are set forth. A design conforming to these requirements is presented and the experiments conducted to optimise the physical layer are described. An original token passing protocol is proposed for the access method and evaluated in comparison with the contention method by means of a specially devised simulation system.

This paper describes the development of the electrical systems for the integrated control system which unified automobile electronic control systems and led to a dramatic improvement in vehicle dynamics. An outline of the system is presented first, followed by actual automobile application examples of electrical systems employing medium-speed multiplexing.