METHOD OF CONTROLLING VEHICLE WHEEL AXLE TORQUE AND CONTROL SYSTEM FOR SAME
First Claim
1. A method of controlling torque on a wheel axle comprising:
- comparing at least one torque intervention request to a predetermined minimum axle torque for a current vehicle speed and a current direction of motion of the vehicle;
wherein the predetermined minimum axle torque decreases as vehicle speed in an operator-selected direction of motion increases;
calculating via a controller an arbitrated axle torque based on an operator-requested axle torque, the current vehicle speed, the current direction of motion, and the greater of said at least one torque intervention request and the predetermined minimum axle torque; and
applying axle torque to the wheel axle based at least partially on the arbitrated axle torque.
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0 Petitions
Accused Products
Abstract
A method of controlling torque on a vehicle wheel axle includes comparing a torque intervention request to a predetermined minimum axle torque for a current vehicle speed and a current direction of motion of the vehicle. The predetermined minimum axle torque decreases as vehicle speed in an operator-selected direction of motion increases. An arbitrated axle torque is calculated based on an operator-requested torque, the current vehicle speed, the current direction of motion, and the greater of the torque intervention request and the predetermined minimum torque. Axle torque is applied to the vehicle'"'"'s wheel axle based at least partially on the arbitrated axle torque.
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Citations
15 Claims
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1. A method of controlling torque on a wheel axle comprising:
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comparing at least one torque intervention request to a predetermined minimum axle torque for a current vehicle speed and a current direction of motion of the vehicle;
wherein the predetermined minimum axle torque decreases as vehicle speed in an operator-selected direction of motion increases;calculating via a controller an arbitrated axle torque based on an operator-requested axle torque, the current vehicle speed, the current direction of motion, and the greater of said at least one torque intervention request and the predetermined minimum axle torque; and applying axle torque to the wheel axle based at least partially on the arbitrated axle torque. - View Dependent Claims (2, 3, 4)
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5. A method of controlling wheel axle torque comprising:
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determining an operator-selected direction of motion for a vehicle; determining vehicle speed; determining an actual direction of motion of the vehicle; comparing at least one torque intervention request to a predetermined axle torque limit for the vehicle speed and the actual direction of motion; calculating via a controller an arbitrated axle torque;
wherein the arbitrated axle torque is based on an operator-requested axle torque and said at least one torque intervention request if said at least one torque intervention request is greater than the predetermined axle torque limit;wherein the arbitrated axle torque is based on the operator-requested axle torque and the predetermined axle torque limit if said at least one torque intervention request is not greater than the predetermined axle torque limit; and applying the arbitrated axle torque to a wheel axle of the vehicle, thereby preventing motion of the vehicle in a direction opposite the operator-selected direction of motion. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. A system for controlling wheel axle torque comprising:
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a driver-operated shift lever operable to establish an intended direction of motion of the vehicle; a driver-operated accelerator device operable to establish a desired axle torque; at least one torque control system operable to establish a torque intervention request; a first controller operatively connected with the driver-operated shift lever, with the driver-operated accelerator device, and with said at least one torque control system;
wherein the first controller has a processor with;a first algorithm that; compares said at least one torque intervention request to a predetermined minimum axle torque that decreases as vehicle speed in the intended direction of motion increases above a predetermined threshold speed, that increases as vehicle speed in the intended direction of motion and below the predetermined minimum speed increases, and that increases as vehicle speed in a direction of motion opposite the intended direction of motion increases; determines the greater of said at least one torque intervention request and said predetermined minimum axle torque; and calculates an arbitrated axle torque based on said desired axle torque and the greater of said at least one torque intervention request and said predetermined minimum axle torque; and a second controller operatively connected with the first controller;
wherein the second controller receives a signal corresponding with the arbitrated axle torque from the first controller and has;a second algorithm that determines how to establish the arbitrated axle torque to be applied to a vehicle axle. - View Dependent Claims (14, 15)
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Specification