Method for verifying the parking brake force in a vehicle
AssigneeRobert Bosch GmbH
InventorsFrank Baehrle-Miller, Helmut Wolff
Life of this patent
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Abstract
A method for verifying the parking brake force in a vehicle includes comparing a travel of a brake booster with a reference travel. The method further includes producing an error signal in case of a predetermined deviation between the travel of the brake booster and the reference travel. The vehicle includes a hydraulic vehicle brake with a brake booster and an electromechanical brake mechanism with an electric brake motor for producing a braking force to displace a brake piston.
Claims10
A method for verifying a parking brake force in a vehicle, the vehicle including a hydraulic vehicle brake with a brake booster and an electromechanical brake mechanism with an electric brake motor for producing a braking force to displace a brake piston, the method comprising:
- measuring an actual travel of the brake booster by detecting displacement of an actuating rod of the brake booster using a sensor in the brake booster, the actuating rod being configured to output a boosting movement of the brake booster;
- comparing the actual travel of the brake booster with a reference travel of the brake booster;
- determining the reference travel using a pressure difference between a hydraulic target parking brake pressure and a lower parking brake pressure, at which one or more brake circuits of the hydraulic vehicle brake are hydraulically isolated;
- and
- producing an error signal in case of a predetermined deviation between the actual travel of the brake booster and the reference travel.
Dependencies are inferred from the claim text.