Method for controlling a pedal lever of a hydraulic power brake
AssigneeRobert Bosch GmbH
InventorFrank Overzier
Life of this patent
Estimating the term…
Abstract
A method for controlling a pedal lever of a hydraulic power brake for an at least partially automated mobile platform. In the method, the pedal lever acts mechanically on a master brake cylinder, and the pedal lever is mechanically coupled to an actuator. The method includes: providing a first signal to a control unit for the power brake for the purpose of controlling the pedal lever so as to move same into a passive position; establishing a first hydraulic connection between the master brake cylinder and a compensating volume; and transferring a first hydraulic volume of the master brake cylinder into the compensating volume by means of the actuator acting on the pedal lever in order to control the pedal lever so as to move same into a passive position.
Claims15
A method for controlling a pedal lever of a hydraulic power brake for an at least partially automated mobile platform, wherein the pedal lever acts mechanically on a master brake cylinder, and the pedal lever is mechanically coupled to an actuator, the method comprising the following steps in a case of a first signal being provided to a control unit for the power brake to move the pedal lever into a passive position:
- establishing a first hydraulic connection between the master brake cylinder and a compensating volume;
- and
- transferring a first hydraulic volume of the master brake cylinder into the compensating volume by the actuator acting on the pedal lever to control the pedal lever to move into the passive position;
- wherein the passive position is at least one of:
- a predefined position of the pedal lever, the predefined position being predefined for an automated mode of the mobile platform, the first signal being provided when the mobile platform is to transition from a manual operating mode into the automated mode;
- and
- a maximum depression position of the pedal lever.
A method for controlling a pedal lever of a hydraulic power brake for an at least partially automated mobile platform, wherein the pedal lever acts mechanically on a master brake cylinder, and the pedal lever is mechanically coupled to an actuator, the method comprising:
- in a case of a first signal being provided to a control unit for the power brake to move the pedal lever into a passive position:
- opening at least a first hydraulic valve of the hydraulic power brake to establish a first hydraulic connection between the master brake cylinder and a compensating volume;
- and
- transferring a first hydraulic volume of the master brake cylinder into the compensating volume by the actuator acting on the pedal lever to control the pedal lever to move into the passive position;
- and
- in a case of a second signal being provided to the control unit for the power brake to move the pedal lever into a manual actuating position subsequent to the movement of the pedal lever into the passive position:
- establishing a second hydraulic connection between the master brake cylinder and the compensating volume by at least a second hydraulic valve of the hydraulic power brake;
- and
- transferring a second hydraulic volume for the master brake cylinder from the compensating volume by the actuator acting on the pedal lever, through the second hydraulic connection, to control the pedal lever to move into the manual actuating position;
- wherein the method includes at least one of the following two features (I)-(II):
- (I) the compensating volume is a hydraulic fluid reservoir, and the second hydraulic connection has a check valve that is in the form of a seal of the master brake cylinder;
- and
- (II) the compensating volume is provided by a mechanical displacement of a piston of a plunger of the hydraulic power brake, the second hydraulic volume is provided by a mechanical displacement of the piston, the transfer of the second hydraulic volume is made to the master brake cylinder by the mechanical displacement of the piston and to the actuator acting on the pedal lever, and the movement of the pedal lever into the manual actuating position is from the passive position and further includes opening a third hydraulic connection between the master brake cylinder and the plunger using at least a third hydraulic valve of the hydraulic power brake.
A hydraulic power brake system of an at least automated mobile platform, comprising:
- a master brake cylinder;
- an actuator;
- a pedal lever that is mechanically coupled to the actuator and is configured to act mechanically on the master brake cylinder;
- a control unit;
- and
- a valve system that includes at least one hydraulic valve;
- wherein, in a case of a first signal being provided to the control unit for the power brake to move the pedal lever into a passive position, the control unit is configured to perform a control that includes:
- using the valve system to establish a first hydraulic connection between the master brake cylinder and a compensating volume;
- and
- transferring a first hydraulic volume of the master brake cylinder into the compensating volume with the actuator acting on the pedal lever to control the pedal lever to move into the passive position;
- wherein the passive position is at least one of:
- a predefined position of the pedal lever, the predefined position being predefined for an automated mode of the mobile platform, the first signal being provided when the mobile platform is to transition from a manual operating mode into the automated mode;
- and
- a maximum depression position of the pedal lever.
Dependencies are inferred from the claim text.