Method for controlling a parking brake in a vehicle
First Claim
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1. A method for controlling a parking brake in a vehicle, the parking brake including an electromechanical braking device having an electric brake motor configured to displace a brake pad on a brake piston in a direction of a brake disk, the method comprising:
- applying a supply voltage to the electric brake motor to set the brake pad in motion in the direction of the brake disk from a starting position; and
after applying the supply voltage, switching off the supply voltage to the electric brake motor in response to the supply voltage having been applied to the electric brake motor for a predefined time period and before the brake pad comes into contact with the brake disk, the brake pad being allowed to continue to move in the direction of the brake disk after switching off the supply voltage.
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Accused Products
Abstract
In a method for controlling a parking brake in a vehicle, in order to set a clearance between the brake pad and the brake disk, a supply voltage is first applied to an electric motor, after which the supply voltage is switched off before the brake pad comes into contact with the brake disk.
11 Citations
9 Claims
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1. A method for controlling a parking brake in a vehicle, the parking brake including an electromechanical braking device having an electric brake motor configured to displace a brake pad on a brake piston in a direction of a brake disk, the method comprising:
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applying a supply voltage to the electric brake motor to set the brake pad in motion in the direction of the brake disk from a starting position; and after applying the supply voltage, switching off the supply voltage to the electric brake motor in response to the supply voltage having been applied to the electric brake motor for a predefined time period and before the brake pad comes into contact with the brake disk, the brake pad being allowed to continue to move in the direction of the brake disk after switching off the supply voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control unit for controlling a parking brake in a vehicle, the parking brake including an electromechanical braking device having an electric brake motor configured to displace a brake pad on a brake piston in a direction of a brake disk, the control unit being one of closed-loop and open-loop, the control unit comprising:
a processor configured to; apply a supply voltage to the electric brake motor to set the brake pad in motion in the direction of the brake disk from a starting position; determine a motor constant of the electric brake motor while the brake pad moves in the direction of the brake disk; and after applying the supply voltage, switch off the supply voltage to the electric brake motor after the motor constant of the brake motor is ascertained and before the brake pad comes into contact with the brake disk, the brake pad being allowed to continue to move in the direction of the brake disk after switching off the supply voltage.
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9. A parking brake in a vehicle, the parking brake comprising:
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an electromechanical braking device having an electric brake motor configured to displace a brake pad on a brake piston in a direction of a brake disk; and control unit, the control unit being one of closed-loop and open-loop, the control unit being configured to; apply a supply voltage to the electric brake motor to set the brake pad in motion in the direction of the brake disk from a starting position; determine a switch-off time based on the supply voltage, a measured motor current of the electric brake motor, and a desired distance to be set between the brake pad and the brake; and after applying the supply voltage, switch off the supply voltage to the electric brake motor at the switch off time before the brake pad comes into contact with the brake disk, the brake pad being allowed to continue to move in the direction of the brake disk after switching off the supply voltage.
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Specification