Patent ID: 8016719
Filing Date: 2011-09-13
Classification: F16H,Y10T

Abstract:
1. A method of selecting a neutral position of an automatic or automated transmission of a motor vehicle and of selecting a parking device of the motor vehicle intended for immobilizing the motor vehicle, the neutral position and the parking device being engageable or actuatable as a function of a position (P, R, N, D) chosen by the driver of the motor vehicle via a selector device and as a function of other operating parameters of the motor vehicle, the method comprising the following steps: IF the motor vehicle has come at least approximately to a stop AND simultaneously an ignition circuit acting on a driving motor of the motor vehicle is electrically interrupted AND simultaneously a “Park” (P) position is selected by the selector device, THEN the parking device is and remains actuated for immobilizing the motor vehicle; IF the motor vehicle has come at least approximately to a stop AND simultaneously the ignition circuit of the driving motor is electrically interrupted AND simultaneously a “Forward” (D) or a “Reverse” (R) position is selected by the selector device, THEN the parking device is automatically actuated for immobilizing the motor vehicle; IF the motor vehicle has come at least approximately to a stop AND simultaneously the ignition circuit of the driving motor is electrically interrupted AND simultaneously a “Neutral” (N) position is selected by the selector device AND simultaneously an N-holding phase that can be activated by way of a separate control device provided in addition to the selector device is activated, as long as an energy management system of the motor vehicle or the transmission allows the N-holding phase to be activated, THEN the transmission is automatically switched into a neutral position having no frictional connection and temporarily held in the neutral position having no frictional connection; IF the motor vehicle has come at least approximately to a stop AND simultaneously the ignition circuit of the driving motor is electrically interrupted AND simultaneously a “Neutral” (N) position is selected by the selector device AND simultaneously the N-holding phase is not activated, THEN the parking device is automatically actuated for immobilizing the motor vehicle.