Brake control method utilizing a controlled center differential
First Claim
1. A method of controlling a differential within a controlled brake system, the method comprising:
- activating the differential coupled to a secondary axle responsive to a control signal;
receiving a left wheel speed of the secondary axle and a right wheel speed of the secondary axle;
comparing the left wheel speed to the right wheel speed;
assigning the left wheel speed as the secondary axle wheel speed when the left wheel speed is greater than the right wheel speed;
assigning the right wheel speed as the secondary axle wheel speed when the right wheel speed is greater than the left wheel speed;
receiving a vehicle speed;
determining a difference value between the vehicle speed and the secondary axle wheel speed; and
activating the differential responsive to the difference value.
2 Assignments
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Accused Products
Abstract
A method is directed to controlling a differential within an active antilock brake system. The method provides for receiving a secondary axle wheel speed, receiving a vehicle speed, determining a difference value between the vehicle speed and the secondary axle wheel speed, and activating the differential responsive to the difference value. The step of activating the differential responsive to the difference value may include steps for comparing the difference value to a threshold value and activating the differential based on the comparison. The step of activating the differential based on the comparison may include steps for determining a differential request value based on the comparison, activating the differential responsive to the differential request value when the differential request value is less than a maximum differential request value, and activating the differential responsive to the maximum differential request value when the differential request value exceeds the maximum differential request value.
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Citations
26 Claims
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1. A method of controlling a differential within a controlled brake system, the method comprising:
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activating the differential coupled to a secondary axle responsive to a control signal;
receiving a left wheel speed of the secondary axle and a right wheel speed of the secondary axle;
comparing the left wheel speed to the right wheel speed;
assigning the left wheel speed as the secondary axle wheel speed when the left wheel speed is greater than the right wheel speed;
assigning the right wheel speed as the secondary axle wheel speed when the right wheel speed is greater than the left wheel speed;
receiving a vehicle speed;
determining a difference value between the vehicle speed and the secondary axle wheel speed; and
activating the differential responsive to the difference value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling a differential within a controlled brake system, the method comprising:
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receiving a secondary axle wheel speed;
receiving a vehicle speed;
determining a difference value between the vehicle speed and the secondary axle wheel speed;
comparing the difference value to a threshold value;
determining a differential request value based on the comparison;
activating the differential responsive to the differential request value when the differential request value is less than a maximum differential request value; and
activating the differential responsive to the maximum differential request value when the differential request value exceeds the maximum differential request value. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A computer readable medium storing a computer program comprising:
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computer readable code for activating the differential coupled to a secondary axle responsive to a control signal;
computer readable code for receiving a left wheel speed of the secondary axle and for receiving a right wheel speed of the secondary axle;
computer readable code for comparing the left wheel speed to the right wheel speed;
computer readable code for assigning the left wheel speed as the secondary axle wheel speed when the left wheel speed is greater than the right wheel speed;
computer readable code for assigning the right wheel speed as the secondary axle wheel speed when the right wheel speed is greater than the left wheel speed computer readable code for receiving a vehicle speed;
computer readable code for determining a difference value between the calculated vehicle speed and the secondary axle wheel speed; and
computer readable code for activating the differential responsive to the difference value. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification