Method for setting a parking brake in a vehicle
First Claim
1. A method for determining an electromechanical clamping force generated by an electric brake motor of a parking brake of a vehicle, comprising:
- measuring current values of a motor current of the electric brake motor using a current sensor;
determining a standard deviation from a current curve of the electric brake motor of the parking brake using a control device of the parking brake, the current curve being based on the measured current values; and
determining the electromechanical clamping force based on motor parameters of the electric brake motor using the control device,wherein the control device is configured to calculate the motor parameters based on the measured current values when the standard deviation does not exceed a limit value,wherein the control device is configured to calculate the motor parameters based on a correcting current when the standard deviation exceeds the limit value, the correcting current being a product of (i) a measured current value obtained prior to the standard deviation exceeding the limit value and (ii) a scaling factor.
1 Assignment
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Accused Products
Abstract
A method for setting a parking brake includes determining a standard deviation from a current curve of an electric brake motor. The current curve is based on measured current valued. The method further includes determining an electromechanical clamping force. The electromechanical clamping force can be determined based on a correcting current or the current values of the brake motor. The correcting current is determined if the standard deviation exceeds a limit value and motor parameters of the brake motor being determined using the correcting current. The parking brake includes an electromechanical braking mechanism having the electric brake motor configured to generate an electromechanical clamping force.
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Citations
15 Claims
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1. A method for determining an electromechanical clamping force generated by an electric brake motor of a parking brake of a vehicle, comprising:
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measuring current values of a motor current of the electric brake motor using a current sensor; determining a standard deviation from a current curve of the electric brake motor of the parking brake using a control device of the parking brake, the current curve being based on the measured current values; and determining the electromechanical clamping force based on motor parameters of the electric brake motor using the control device, wherein the control device is configured to calculate the motor parameters based on the measured current values when the standard deviation does not exceed a limit value, wherein the control device is configured to calculate the motor parameters based on a correcting current when the standard deviation exceeds the limit value, the correcting current being a product of (i) a measured current value obtained prior to the standard deviation exceeding the limit value and (ii) a scaling factor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A closed-loop control device configured to perform a method for determining an electromechanical clamping force generated by an electric brake motor of a parking brake of a vehicle, the closed loop control device comprising:
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a control device configured to; receive current values of a motor current of the electric brake motor from a current sensor of the vehicle; determine a standard deviation from a current curve of the electric brake motor of the parking brake, the current curve being based on the current values received from the current sensor; and determine the electromechanical clamping force based on motor parameters of the electric brake motor, wherein the control device is configured to calculate the motor parameters based on the measured current values when the standard deviation does not exceed a limit value, and wherein the control device is configured to calculate the motor parameters based on a correcting current when the standard deviation exceeds the limit value, the correcting current being a product of (i) a measured current value obtained prior to the standard deviation exceeding the limit value and (ii) a scaling factor. - View Dependent Claims (13)
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14. An open-loop control device configured to perform a method for determining an electromechanical clamping force generated by an electric brake motor of a parking brake of a vehicle, the open-loop control device comprising:
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a control device configured to; receive current values of a motor current of the electric brake motor from a current sensor of the vehicle; determine a standard deviation from a current curve of the electric brake motor of the parking brake, the current curve being based on the current values received from the current sensor; and determine the electromechanical clamping force based on motor parameters of the electric brake motor, wherein the control device is configured to calculate the motor parameters based on the measured current values when the standard deviation does not exceed a limit value, and wherein the control device is configured to calculate the motor parameters based on a correcting current when the standard deviation exceeds the limit value, the correcting current being a product of (i) a measured current value obtained prior to the standard deviation exceeding the limit value and (ii) a scaling factor. - View Dependent Claims (15)
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Specification