Motor vehicle parking brake system, with an automatic gearbox, coordinates the working of the independent gearbox and wheel brakes so that the gearbox brake is always activated to block the gearbox output shaft

摘要

The automatic gearbox (14) for a motor vehicle has an electronically controlled brake (19) for the gearbox output shaft in the parking setting and there is also an electronically controlled electromechanical parking brake (16) for the wheels, operated independently of each other. The gearbox control (10) and parking brake control (12) are linked (30) together. A central control (22) activates at least the gearbox brake when there is one set of parking circumstances and also when the wheel parking brake is operated.