Method, regulating and control appliance, and parking brake comprising such a regulating and control appliance, for adjusting a clamping force exerted by a parking brake
AssigneeRobert Bosch GmbH
InventorsFrank Baehrle-Miller, Tobias Putzer
Life of this patent
Estimating the term…
Abstract
In a method for adjusting the clamping force exerted by a parking brake, which force is applied by an electric-motor braking apparatus that encompasses an electric braking motor and power-supply and control units, and as necessary by an additional braking apparatus, an equivalent resistance is ascertained from a measurement of current and voltage and is used as the basis for calculating the maximum generatable clamping force.
Claims13
1-12. (canceled)
A method for adjusting a clamping force exerted by a parking brake, which force is applied by an electric-motor braking apparatus that encompasses an electric braking motor, power-supply, control units, and an additional braking apparatus, the method comprising:
- ascertaining a total resistance in the electric-motor braking apparatus from a sum of equivalent motor resistance and an equivalent control device resistance, the equivalent control device resistance referring to a resistance in the power-supply and control units of the braking motor, and being ascertained from parameters of the electric-motor braking apparatus;
- and
- using the total resistance as a basis for at least one of ascertaining a maximum generatable clamping force, and ascertaining a motor current required for a target clamping force, an additional braking force being applied by the additional braking apparatus for a case in which the maximum generatable clamping force falls below an associated threshold value or the motor current required for the target clamping force exceeds an associated threshold value.
A closed- or open-loop control device for carrying out a method for adjusting a clamping force exerted by a parking brake, which force is applied by an electric-motor braking apparatus that encompasses an electric braking motor, power-supply, control units, and an additional braking apparatus, the method comprising:
- ascertaining a total resistance in the electric-motor braking apparatus from a sum of equivalent motor resistance and an equivalent control device resistance, the equivalent control device resistance referring to a resistance in the power-supply and control units of the braking motor, and being ascertained from parameters of the electric-motor braking apparatus;
- and
- using the total resistance as a basis for at least one of ascertaining a maximum generatable clamping force, and ascertaining a motor current required for a target clamping force, an additional braking force being applied by the additional braking apparatus for a case in which the maximum generatable clamping force falls below an associated threshold value or the motor current required for the target clamping force exceeds an associated threshold value.
A parking brake in a vehicle having a closed- or open-loop control device for carrying out a method for adjusting a clamping force exerted by a parking brake, which force is applied by an electric-motor braking apparatus that encompasses an electric braking motor, power-supply, control units, and an additional braking apparatus, the method comprising:
- ascertaining a total resistance in the electric-motor braking apparatus from a sum of equivalent motor resistance and an equivalent control device resistance, the equivalent control device resistance referring to a resistance in the power-supply and control units of the braking motor, and being ascertained from parameters of the electric-motor braking apparatus;
- and
- using the total resistance as a basis for at least one of ascertaining a maximum generatable clamping force, and ascertaining a motor current required for a target clamping force, an additional braking force being applied by the additional braking apparatus for a case in which the maximum generatable clamping force falls below an associated threshold value or the motor current required for the target clamping force exceeds an associated threshold value.
Dependencies are inferred from the claim text.