Based on the phenomenon that the automobile drivers mistakenly step on the accelerator which causes serious traffic accident to occur frequently in emergency situations, this paper analyzes the accelerator and brake pedal manipulation and op- erating modes. With the judgment of the force applied on the pedal, a mechanical centrifugal safety assistance device of automo- bile accelerator pedal is designed which transfers the mistaken manipulation on the pedal into safe operation. It obtains the dis- tribution of stress and strain of the core component of the input shaft and the ratchet mechanism...
