Motor vehicle with a parking brake system
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorAchim Siepker
Life of this patent
Estimating the term…
Abstract
A motor vehicle parking brake system which is operated by non-muscular energy, includes both by a hydraulic pressure generator and by an electromechanical control unit. A control unit ensures that the switch between hydraulic and electromechanical operation is made as a function of the operating state of the vehicle.
Claims18
A parking brake system for a vehicle, comprising:
- frictional braking means for applying a frictional braking force to wheels of said vehicle;
- a hydraulic pressure generator for actuating said frictional braking unit;
- an electromechanical unit for actuating said frictional braking unit;
- a plurality of sensors which generate signals indicative of operating conditions of the vehicle;
- and
- a control means for selectively and alternatively actuating said hydraulic pressure generator and said electromechanical unit to engage said parking brake according to said signals from said sensors, with said frictional braking means being actuated hydraulically when the vehicle is in use, and electromechanically when the vehicle is parked.
A parking brake system for a vehicle, comprising:
- frictional braking means for applying a frictional braking force to wheels of said vehicle;
- a hydraulic pressure generator for actuating said frictional braking unit;
- an electromechanical unit for actuating said frictional braking unit;
- a plurality of sensors which generate signals indicative of operating conditions of the vehicle;
- and
- a control means for selectively and alternatively actuating said hydraulic pressure generator and said electromechanical unit to engage said parking brake according to said signals from said sensors,
- wherein beginning with electromechanical actuation of the frictional braking means, said control means causes a switch to hydraulic actuation whenever at least one of the following conditions occur:
- the door lock on the driver's side is activated;
- the driver's door opens;
- the driver's seat is occupied;
- and
- the ignition is turned on;
- and wherein a switch is made back to electromechanical actuation whenever at least one of said conditions ceases.
Method of controlling a frictional parking brake system for a motor vehicle, which parking brake system has a hydraulic pressure generator and an electromechanical unit which are alternatively actuatable to engage said parking brake, said method comprising:
- sensing a plurality of vehicle operating parameters and generating signals indicative of operating conditions of said vehicle;
- and
- selectively actuating said hydraulic pressure generator when said vehicle is in use, and said electromechanical unit when said vehicle is parked.
Method of controlling a frictional parking brake system for a motor vehicle, which parking brake system has a hydraulic pressure generator and an electromechanical unit which are alternatively actuatable to engage said parking brake, said method comprising:
- sensing a plurality of vehicle operating parameters and generating signals indicative of operating conditions of said vehicle;
- selectively actuating said hydraulic pressure generator and said electromechanical unit such that said hydraulic pressure generator is actuated whenever at least one of the following conditions occur:
- the door lock on the driver's side is activated;
- the driver's door opens;
- the driver's seat is occupied;
- and
- the ignition is turned on;
- and such that said electromechanical unit is actuated when at least one of the above conditions ceases.
Dependencies are inferred from the claim text.