ELECTRO-HYDROSTATIC BRAKE CONTROL
First Claim
1. An electro-hydrostatic brake system comprising:
- a motor in electronic control communication with a motor controller;
a pump mechanically coupled to the motor;
a hydraulic tank fluidly coupled with the pump;
a hydraulic pressure rail fluidly coupled in fluid receiving communication with the pump;
a brake actuator in fluid communication with the hydraulic pressure rail and configured to exert a braking force on a wheel, wherein the braking force is directly modulated by at least one of the motor and the pump; and
a hydraulic return rail in fluid receiving communication with the brake actuator, wherein the hydraulic return rail is separate from the hydraulic pressure rail.
1 Assignment
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Accused Products
Abstract
An electro-hydrostatic brake system includes a motor controller configured to receive a brake command, a motor in electronic control communication with the motor controller, and a pump mechanically coupled to the motor. In various embodiments, the electro-hydrostatic brake system further includes a hydraulic tank fluidly coupled in fluid providing communication with the pump, a hydraulic pressure rail fluidly coupled in fluid receiving communication with the pump, and a brake actuator in fluid communication with the hydraulic pressure rail and configured to exert a braking force on a wheel, wherein the braking force is directly modulated by the motor and/or the pump.
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Citations
20 Claims
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1. An electro-hydrostatic brake system comprising:
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a motor in electronic control communication with a motor controller; a pump mechanically coupled to the motor; a hydraulic tank fluidly coupled with the pump; a hydraulic pressure rail fluidly coupled in fluid receiving communication with the pump; a brake actuator in fluid communication with the hydraulic pressure rail and configured to exert a braking force on a wheel, wherein the braking force is directly modulated by at least one of the motor and the pump; and a hydraulic return rail in fluid receiving communication with the brake actuator, wherein the hydraulic return rail is separate from the hydraulic pressure rail. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electro-hydrostatic brake system comprising:
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a motor controller; a motor in electronic control communication with the motor controller; a pump mechanically coupled to the motor; a hydraulic tank fluidly coupled with the pump; a hydraulic pressure rail fluidly coupled in fluid receiving communication with the pump; a brake actuator in fluid communication with the hydraulic pressure rail; a feedback sensor coupled in electronic feedback communication with the motor controller and coupled to at least one of the hydraulic pressure rail and the brake actuator; a hydraulic return rail in fluid communication with the brake actuator and the hydraulic tank; and a bleed valve coupled to the hydraulic return rail between the brake actuator and the hydraulic tank; wherein the motor controller comprises a processor; and wherein a tangible, non-transitory memory is configured to communicate with the processor, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the processor, cause the electro-hydrostatic brake system to perform operations comprising; receiving, by the processor of the motor controller, a brake command; in response to the motor controller receiving the brake command, actuating the motor to deliver a hydrostatic pressure to the hydraulic pressure rail via the pump such that the brake actuator exerts a braking force on a wheel; receiving, by the processor of the motor controller, feedback from the feedback sensor; in response to the motor controller receiving the feedback, actuating the motor to change the hydrostatic pressure delivered to the hydraulic pressure rail via the pump such that the brake actuator changes the braking force; and in response to the motor controller receiving the feedback, actuating the bleed valve to decrease the hydrostatic pressure in the hydraulic pressure rail via the hydraulic return rail such that the braking force changes. - View Dependent Claims (12, 13)
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10-11. -11. (canceled)
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14. A method of controlling a braking force of an electro-hydrostatic system, the method comprising:
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receiving, by a processor of a motor controller, a brake command; and commanding, by the processor and in response to the motor controller receiving the brake command, actuating a motor mechanically coupled to a pump to deliver a hydrostatic pressure to a hydraulic pressure rail via the pump such that a brake actuator exerts a braking force on a wheel; wherein a hydraulic return rail is also fluidly coupled to the brake actuator and is separate from the hydraulic pressure rail. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification