Method for operating a hydraulic brake system of a motor vehicle and a hydraulic braking system
AssigneeFord Global Technologies, LLC
InventorsThomas Svensson, Ian Moore, Rudolf Daniels
Life of this patent
Estimating the term…
Abstract
A method for operating a hydraulic brake system of a motor vehicle, comprising a pressure generating device used to build up additional brake pressure in a master brake cylinder or in addition to a master brake cylinder and in opposition to further pedal actuation wherein the additional pressure is a function of the pedal actuation travel distance. A method that reduces the limitations of a braking system's physical parameters on the build-up of additional braking pressure.
Claims16
A method for operating a hydraulic brake system of a motor vehicle, comprising:
- activating a pressure generating device used to build up additional brake pressure in a master brake cylinder or in addition to a master brake cylinder responsive to a predetermined minimum residual actuating travel distance of a brake pedal not being available, wherein the brake pedal of the motor vehicle is actuated in order to generate brake pressure in the master brake cylinder responsive to a prevailing deceleration of the motor vehicle, the pressure generating device controlled in such a manner that a counter force that acts on the brake pedal in an opposite direction to a direction of actuation continuously increases as the brake pedal is further actuated, wherein the residual actuating travel distance of the brake pedal is determined based on a no-load position of the brake pedal.
A hydraulic brake system of a motor vehicle comprising:
- a master brake cylinder that can be actuated by a brake pedal in order to generate a brake pressure;
- at least one wheel brake device that is in fluid-flow communication with the master brake cylinder;
- a pressure generating device in order to build up an additional brake pressure in the master brake cylinder;
- and
- a controller including instructions to:
- determine a predetermined minimum residual actuation travel distance of the brake pedal;
- if the minimum residual actuation travel distance is not available, activate the pressure generating device, and
- deactivate the pressure generating device upon activation of anti-lock braking, wherein the residual actuation travel distance of the brake pedal is determined based on a no-load position of the brake pedal.
A method, comprising:
- generating braking pressure within a master brake cylinder of a hydraulic braking system via brake pedal actuation;
- and
- generating additional pressure within the master brake cylinder or in addition to the master brake cylinder in response to brake pedal actuation distance via an additional pressure generating device, wherein applying the additional pressure includes increasing continuously with increased pedal actuation, wherein applying additional brake pressure includes increasing as an available travel distance between a residual brake pedal actuation travel distance and a predetermined minimal residual actuation threshold decreases, and increasing as a travel distance between a predetermined maximum actuation travel distance and an actuation travel distance actually travelled from a no-load position of a brake pedal decreases.
Dependencies are inferred from the claim text.