Method for reducing the clamping force applied by a parking brake
First Claim
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1. A method for reducing a clamping force applied by a parking brake, which is generatable at least partially by an electromechanical brake device including an electric brake motor, the electric brake motor displacing a brake piston to which a hydraulic pressure of a hydraulic brake device is appliable, the method comprising:
- determining that the electric brake motor one of is not releasable and will not be releasable for displacement of the brake piston to reduce the clamping force, wherein the determination is based on at least one operating variable of one of a previous engagement of the parking brake and the current engagement of the parking brake; and
responsive to the determination, generating a signal for actuating the hydraulic brake device for reducing the clamping force.
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Abstract
In a method for reducing the clamping force applied by a parking brake, which may be generated at least partially by an electromechanical brake device having an electric brake motor and supplemented if necessary by a hydraulic brake device, a signal is generated for actuating the hydraulic brake device for the case that it is not possible for the brake motor to be released for reducing the clamping force.
29 Citations
16 Claims
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1. A method for reducing a clamping force applied by a parking brake, which is generatable at least partially by an electromechanical brake device including an electric brake motor, the electric brake motor displacing a brake piston to which a hydraulic pressure of a hydraulic brake device is appliable, the method comprising:
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determining that the electric brake motor one of is not releasable and will not be releasable for displacement of the brake piston to reduce the clamping force, wherein the determination is based on at least one operating variable of one of a previous engagement of the parking brake and the current engagement of the parking brake; and responsive to the determination, generating a signal for actuating the hydraulic brake device for reducing the clamping force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for reducing a clamping force applied by a parking brake, which is generatable at least partially by an electromechanical brake device including an electric brake motor, the electric brake motor displacing a brake piston to which a hydraulic pressure of a hydraulic brake device is appliable, the method comprising:
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determining that the electric brake motor one of is not releasable and will not be releasable for displacement of the brake piston to reduce the clamping force, wherein the determination is based on a reengagement having been carried out following a previous engagement of the parking brake; and responsive to the determination, generating a signal for actuating the hydraulic brake device for reducing the clamping force.
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13. A regulating and control unit for reducing a clamping force applied to a parking brake, the clamping force being generatable at least partially by an electromechanical brake device including an electric brake motor, wherein:
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the regulating and control unit is configured to generate a signal for actuating the hydraulic brake device for reducing the clamping force responsive to a determination that the electric brake motor one of is not releasable and will not be releasable for displacement of the brake piston to reduce the clamping force; and the determination is based on at least one operating variable of one of a previous engagement of the parking brake and the current engagement of the parking brake.
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14. A parking brake in a vehicle including a regulating and control unit for reducing a clamping force applied to a parking brake , the clamping force being generatable at least partially by an electromechanical brake device including an electric brake motor, wherein:
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the regulating and control unit is configured to generate a signal for actuating the hydraulic brake device for reducing the clamping force responsive to a determination that the electric brake motor one of is not releasable and will not be releasable for displacement of the brake piston to reduce the clamping force; and the determination is based on at least one operating variable of one of a previous engagement of the parking brake and the current engagement of the parking brake.
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15. A method for reducing a clamping force applied by a parking brake, the clamping force being maintained at least partially by an electric brake motor of an electromechanical brake device, the electric brake motor displacing a brake piston to which a hydraulic pressure of a hydraulic brake device is appliable, the method comprising:
generating a signal for actuating the hydraulic brake device to reduce the clamping force responsive to a determination that the brake motor one of is not releasable and will not be releasable for displacement of the brake piston to reduce the clamping force.
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16. A parking brake in a vehicle including a regulating and control unit for reducing a clamping force applied to a parking brake, the clamping force being maintained at least partially by an electric brake motor of an electromechanical brake device, wherein:
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the regulating and control unit is configured to generate a signal for actuating the hydraulic brake device for reducing the clamping force responsive to a determination that the electric brake motor one of is not releasable and will not be releasable for displacement of the brake piston to reduce the clamping force; and the determination is based on at least one operating variable of one of a previous engagement of the parking brake and the current engagement of the parking brake.
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Specification