Patent ID: 8360933

Claim:
A method of operating a drivetrain of a motor vehicle in which the drivetrain comprises a drive aggregate, an accelerator pedal and a brake pedal, and when the drivetrain being operated in a crawling mode and the accelerator pedal and the brake pedal being unactuated, the method comprising the steps of: determining a speed of the motor vehicle; if, during the crawling operation, the speed of the motor vehicle is lower than a defined limit value and the brake pedal is actuated by less than a defined limit amount, reducing the crawling torque supplied for the crawling operation without utilizing auxiliary braking energy to assist with braking of the motor vehicle; if, during the crawling operation the speed of the motor vehicle is lower than the defined limit value but the brake pedal is actuated by more than the defined limit amount, both reducing the crawling torque supplied for the crawling operation and utilizing auxiliary braking energy to assist with braking of the motor vehicle; and if during the crawling operation both the speed of the motor vehicle is greater than the defined limit value and the brake pedal is actuated, both reducing the crawling torque supplied for the crawling operation and calling for auxiliary braking energy to assist with braking of the motor vehicle.