Transmission control system for the automatic transmission of automotive vehicles for gear train locking upon unintended acceleration

摘要

A transmission control system for automobiles having an automatic transmission comprises a hydraulic control circuit including a plurality of valves for locking a gear train itself by engaging a predetermined combination of frictional elements in the gear train upon detecting conditions which would result in sudden acceleration of the vehicle, only when the vehicle speed is lower than a predetermined value. The transmission control system of the invention reliably functions as a safety device for preventing unintended sudden acceleration of the vehicle.