Active Driven Wheel Lift Identification for an Automotive Vehicle
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Abstract
A roll control system (16) for an automotive vehicle (10) is used to actively detect if one of the plurality of the driven wheels (12) is lifted. The system generates a pressure request to determine if the wheel has lifted. By comparing the change in wheel speed of a driven wheel to a change in wheel speed threshold the wheel lift status can be determined. The wheel speed change threshold may be dependent upon various vehicle operating conditions such as powertrain torque, braking torque and/or longitudinal force on the vehicle.
111 Citations
71 Claims
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1. -52. (canceled)
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53. A wheel lift identification system for an automotive vehicle for traveling on a road, the automotive vehicle including at least two driven wheels having wheel speed sensors, the system comprising:
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a microprocessor-based roll controller receiving signals indicative of a wheel speed from the wheel speed sensors; a torque applicator comprising at least one of an electronic engine controller, a driveline engagement mechanism, and a braking system; a torque control system that receives signals indicative of a wheel speed from the wheel speed sensors and acts in conjunction with the torque applicator to control torque applied to the wheels, wherein the torque applicator applies a torque to a wheel for a duration of a build cycle to determine a lift condition, and then releases the torque for a duration of a release cycle to confirm the lift condition. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71)
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Specification