Service brake actuation using a linear actuator
AssigneeDeere & Company
InventorsReginald M. Bindl, Andrew J. Kindle, Jeffrey A. Bauer, Sean P. West, Francois Stander, Steven R. Whiteman
Life of this patent
Estimating the term…
Abstract
A fluid control system that has a fluid assembly with a piston defined within a chamber, an electrical system having a motor configured to selectively reposition the piston, a controller in communication with the electrical system, and a sensor in communication with the controller to identify a fluid pressure value. Wherein, the controller identifies a desired fluid pressure range and selectively repositions the piston with the motor until the fluid pressure value is within the desired fluid pressure range.
Claims18
A fluid control system, comprising:
- a fluid assembly having a piston defined within a chamber and at least one clutch assembly;
- an electrical system having a motor configured to selectively reposition the piston;
- a controller in communication with the electrical system;
- and
- a sensor in communication with the controller to identify a fluid pressure value;
- wherein, the controller identifies a desired fluid pressure range and selectively repositions the piston with the motor until the fluid pressure value is within the desired fluid pressure range;
- further wherein, the position of the piston and the pressure of the fluid assembly is maintained when the electrical system is not powered;
- further wherein, increasing the fluid pressure value increases an apply force applied by the at least one clutch assembly and the at least one clutch assembly selectively engages a power take-off based on a predefined force profile for engaging the at least one clutch assembly.
A system for a work machine, comprising:
- a fluid assembly fluidly coupled to at least one fluid component;
- a motor selectively engaged by a controller;
- and
- a piston repositionable within a cylinder by the motor as the primary pressure producing mechanism of the fluid assembly to selectively alter a fluid pressure applied to the at least one fluid component;
- wherein, the at least one fluid component comprises a brake pack and the motor, piston, and cylinder are positioned at least partially within a portion of an axle sub-assembly of the work machine to selectively apply a braking force to a corresponding wheel.
A method for providing hydraulic pressure to a brake assembly, comprising:
- providing a hydraulic assembly having a piston defined within a cylinder, an electrical system having a motor configured to selectively reposition the piston, a controller in communication with the electrical system, a brake system fluidly coupled to the hydraulic assembly, a pressure sensor, and a user input in communication with the controller to selectively apply a parking brake;
- identifying, with the controller through the user input, a parking brake command;
- establishing a brake pressure range, with the controller, based on the parking brake command;
- monitoring, with the controller through the pressure sensor, an active pressure of the brake system;
- altering the position of the piston within the cylinder, with the controller using the motor, until the active pressure is within the brake pressure range;
- and
- maintaining the active pressure when the electrical system is not powered.
Dependencies are inferred from the claim text.