Abstract
In recent years, fatal traffic accidents are expected to decrease by driver assistance system. PCS(Pre-Crash Safety system) that has been put into practical use in car is a typical example of the system. It is however intended to ensure probabilistic safety depending on the computer. Recent real risk-based safety may demand that the concept of intrinsically safe design should be also applied to the car safety. If you have in the face of danger that can't be avoided immediately, the accident must be prevented by stopping the system. The critical interlock is the ultimate emergency stop control triggered by human to protect him from the fatal damage of accident. As decisive safety means in case of facing accidents involving fatal damage, in this study, critical interlock is logically examined, and a mechanism for stopping the automobile inertia is studied on the base of critical safe control for compensating against fault in mechanical controled emergency stop operation.
