Patent ID: 7641589

Claim:
A motor vehicle having a main brake and a parking brake connected to a transmission, the motor vehicle comprising: the main brake is operable independent of the parking brake and has a brake pedal which is located within the motor vehicle, and the brake pedal enables activation of the main brake; the parking brake being operable, independently from the main brake, the parking brake is the parking bake for the motor vehicle and at least one of an auxiliary brake, for providing braking assistance to the main brake, and a sustained-action brake for sustained braking of the motor vehicle; a transmission electronic system controls a proportional valve which hydraulically controls the parking brake such that the transmission electronic system meters and controls braking power of the parking brake; the brake pedal has a first range of travel and a further range of travel, depression of the brake pedal within the first range of travel commences engagement of one of the parking brake and the main brake, and depression of the brake pedal within the further range of travel commences engagement of the other one of the main brake and the parking brake such that one of braking power of the main brake and the parking brake are combined with one another.