METHOD FOR OPERATING A PARKING BRAKE HAVING AN ELECTROMOTIVELY DRIVEN PARKING BRAKE MECHANISM
First Claim
1. A method for operating a parking brake having an electromotively driven parking brake mechanism, comprising:
- applying the parking brake by use of the electric motor;
switching off the electric motor in the state in which the parking brake is applied;
switching on the electric motor after a prespecified time and starting a brake reapplication process by driving the parking brake mechanism in the brake application direction;
determining an electrical variable of the electric motor during the brake reapplication operation;
comparing the determined electrical variable, or a variable derived therefrom, with a reference value; and
continuing the brake reapplication process or terminating the brake reapplication process depending on the result of the comparison.
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Accused Products
Abstract
A method for operating a parking brake with an electromotively driven parking brake mechanism includes applying the parking brake by the electric motor, switching off the electric motor in the state in which the parking brake is applied, switching on the electric motor after a prespecified time and reapplying the parking brake mechanism in the brake application direction. During the brake reapplication operation, an electrical variable of the electric motor is determined and compared with a reference value. The brake reapplication process is continued or terminated depending on whether the electrical variable, or a variable derived therefrom, is smaller or greater than the reference value.
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Citations
10 Claims
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1. A method for operating a parking brake having an electromotively driven parking brake mechanism, comprising:
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applying the parking brake by use of the electric motor; switching off the electric motor in the state in which the parking brake is applied; switching on the electric motor after a prespecified time and starting a brake reapplication process by driving the parking brake mechanism in the brake application direction; determining an electrical variable of the electric motor during the brake reapplication operation; comparing the determined electrical variable, or a variable derived therefrom, with a reference value; and continuing the brake reapplication process or terminating the brake reapplication process depending on the result of the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. A controller including a device for carrying out a method for operating a parking brake having an electromotively driven parking brake mechanism, the method including:
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applying the parking brake by use of the electric motor; switching off the electric motor in the state in which the parking brake is applied; switching on the electric motor after a prespecified time and starting a brake reapplication process by driving the parking brake mechanism in the brake application direction; determining an electrical variable of the electric motor during the brake reapplication operation; comparing the determined electrical variable, or a variable derived therefrom, with a reference value; and continuing the brake reapplication process or terminating the brake reapplication process depending on the result of the comparison.
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Specification