Method for operating a mechanical parking brake
AssigneeFord Global Technologies, LLC
InventorsPeter Tomczak, Reiner Schmid
Life of this patent
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Abstract
The invention relates to a method for operating a brake device, in particular of a motor vehicle, wherein the brake device comprises a service brake and a mechanical parking brake, wherein the parking brake can be actuated by means of a mechanical actuating element, comprising at least the steps of establishing that the actuating element has been moved from an idle position into a position of use, simultaneously controlling a pressure-increasing element, so that a hydraulic pressure is generated, which hydraulic pressure acts on a brake element that is common with the holding element, blocking the common brake element of the service brake and the parking brake with a mechanical block of the mechanical parking brake.
Claims16
A method for operating a brake device, wherein the brake device comprises a service brake and a mechanical parking brake, wherein the parking brake can be actuated by a mechanical actuating element, comprising at least the steps of:
- establishing that the actuating element has been moved from an idle position into a position of use,
- simultaneously controlling a pressure-generating element, wherein the pressure-generating element causes an increase in a hydraulic pressure acting on a common brake element of the service and parking brakes, wherein the amount of increase of hydraulic pressure applied depends on a static or dynamic state,
- increasing the amount of hydraulic pressure acting on the common brake element based on an actuation level of the actuating element in a dynamic state,
- applying a maximum amount of hydraulic pressure to the common brake element at any actuation level of the actuating element in a static state, and
- blocking the common brake element of the service brake and the parking brake with a mechanical block of the mechanical parking brake.
A method, comprising:
- generating a holding force of a parking brake during interaction of a mechanical parking brake with a hydraulically-actuated service brake by supplementing the holding force via increased hydraulic pressure without activating the service brake
- applying hydraulic pressure only during application of effort by a user on the parking brake,
- applying a maximum amount of hydraulic pressure when in a static mode, where the static mode is determined when wheel speed is below a first threshold,
- applying a moderate first amount of hydraulic pressure when in a dynamic mode, where the dynamic mode is determined when the wheel speed is above the first threshold, and increasing the amount of hydraulic pressure from the first amount to a second amount where an amount of increase is based on effort of the user on the parking brake;
- and
- activating the service brake without actuation of the parking brake.
A method for operating a service brake and a mechanically-actuated parking brake of a vehicle both acting on a common brake element, comprising:
- upon movement of the parking brake from an idle position into an engaged position, simultaneously increasing a hydraulic pressure on the common brake part, the amount of hydraulic pressure increase based on a dynamic or static state, including
- in a static state where the wheel speed is below a first threshold, applying a maximum amount of hydraulic pressure,
- in a dynamic state where the wheel speed is above a first threshold, applying different amounts of hydraulic pressure based on user actuation of the mechanical parking brake;
- and
- blocking the common brake element with a mechanical block of the mechanical parking brake.
Dependencies are inferred from the claim text.