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In order to meet increasing demands for safety and comfort in a vehicle compartment, automatic adjustment of seat, mirrors, steering wheel has been developed. The multiplex wiring system was constructed for the automatic adjustment of the cockpit elements to drivers preferred positions or to physique-matched settings based on ergonomic data. This paper describes the construction of the multiplex system and functions of automatic adjustment of the cockpit elements for comfortable driving position and better visibility.

Crash mechanisms of automobile were simulated by a nonlinear, three-degrees-of-freedom system. Crashworthiness of vehicle structures was obtained analytically, as well as experimentally, and was represented by nonlinear springs. Analytical results were compared with full-size experiments of barrier and rear-end collisions. It was shown that the automobile crash mechanisms may be explained by a simple model, and that a theoretical computation may be feasible to obtain the crashworthiness of vehicle structures.