Retarder Integrated Braking System and Method
First Claim
1. A machine comprising:
- an axle having wheels mounted to it;
a brake system configured to provide service braking to the wheels;
a brake pedal operatively connected to the brake system to provide a braking power to the wheels in proportion to a position of the brake pedal;
a pedal sensor operatively connected to the brake pedal to sense the position of the brake pedal;
a retarder system configured to selectively slow the wheels down;
a speed sensor operatively connected to the machine to detect a speed associated with the machine;
a controller operatively connected to the speed sensor, brake pedal position sensor, and retarder system wherein the controller is configured to operate the retarder system based on signals received from the speed sensor and brake pedal position sensor.
1 Assignment
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Accused Products
Abstract
A machine includes: an axle having wheels mounted to it; a brake system configured to provide service braking to the wheels; a brake pedal operatively connected to the brake system to provide a braking power to the wheels in proportion to the position of the brake pedal; a pedal sensor operatively connected to the brake pedal to sense the position of the brake pedal; a retarder system configured to selectively slow the wheels down; a speed sensor operatively connected to the machine to detect a speed associated with the machine; a controller operatively connected to the speed sensor, brake pedal position sensor, and retarder system wherein the controller is configured to operate the retarder system based on signals received from the speed sensor and brake pedal position sensor. A method for providing an indication to an operator may also be included.
13 Citations
20 Claims
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1. A machine comprising:
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an axle having wheels mounted to it; a brake system configured to provide service braking to the wheels; a brake pedal operatively connected to the brake system to provide a braking power to the wheels in proportion to a position of the brake pedal; a pedal sensor operatively connected to the brake pedal to sense the position of the brake pedal; a retarder system configured to selectively slow the wheels down; a speed sensor operatively connected to the machine to detect a speed associated with the machine; a controller operatively connected to the speed sensor, brake pedal position sensor, and retarder system wherein the controller is configured to operate the retarder system based on signals received from the speed sensor and brake pedal position sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for controlling a retarder system comprising the steps of:
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calculating an operator requested amount of brake power (RBP) based, at least in part, by sensed pedal position of a service brake pedal; calculating a reference retarding power (RRP) based, at least in part, by a speed associated with the drivetrain; calculating a retarding power (PR) by multiplying the requested brake power (RBP) by a first percentage; calculating a percent retarding power (% RP) by dividing the retarding power (RP) by the reference retarding power (RRP); engaging a retarder when the percent retarding power (% RP) is greater than a second percentage in a range of approximately 7%-13% of the reference retarding power for greater than a given amount of time. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for providing an indication to an operator comprising:
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calculating an operator requested amount of brake power (RBP) based, at least in part, by a sensed pedal position of a service brake pedal; measuring how long the requested brake power (RBP) is requested; calculate a predicted axle oil temperature (POT) based, at least in part, on the operator requested amount of brake power (RBP) and a threshold amount of time the operator requested brake power (RBP) is assumed to be requested;
compare the predicted axle oil temperature (POT) to a threshold temperature; anddisplaying an indication to the operator if the predicted axle oil temperature (POT) is above the threshold temperature. - View Dependent Claims (20)
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Specification