Traction control considering wheel slip, pitch and heave
First Claim
1. A traction control system for a motor vehicle, the traction control system comprising an electronic controller configured to identify a wheelslip condition and initiate a traction control intervention at one or more vehicle wheels in dependence on the wheelslip condition, wherein the electronic controller is configured to modify the traction control intervention at said one or more wheels in dependence on a reduced wheel load condition in said one or more wheels, the reduced wheel load condition being identified based on at least one of:
- a signal indicative of vehicle pitch;
or a signal indicative of vehicle heave, wherein one or more of the signal indicative of vehicle pitch comprises vehicle pitch data and the signal indicative of vehicle heave comprises vehicle heave data, and wherein one or more of the vehicle pitch data comprise a pitch profile over time associated with the reduced wheel load condition, the pitch data comprise an inertial pitch sensor signal, the heave data comprise a heave profile over time associated with the reduced wheel load condition, and the heave data comprise an inertial heave sensor signal, and further wherein the controller is configured to modify the traction control intervention by reducing or eliminating the traction control intervention at said one or more wheels.
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Accused Products
Abstract
A traction control system for a motor vehicle includes a controller configured to initiate a traction control intervention at one or more vehicle wheels. The controller is configured to inhibit the traction control intervention in dependence on a reduced wheel load condition in said one or more wheels. The reduced wheel load condition is identified based on at least one of a signal indicative of vehicle pitch and a signal indicative of vehicle heave.
8 Citations
17 Claims
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1. A traction control system for a motor vehicle, the traction control system comprising an electronic controller configured to identify a wheelslip condition and initiate a traction control intervention at one or more vehicle wheels in dependence on the wheelslip condition, wherein the electronic controller is configured to modify the traction control intervention at said one or more wheels in dependence on a reduced wheel load condition in said one or more wheels, the reduced wheel load condition being identified based on at least one of:
- a signal indicative of vehicle pitch;
or a signal indicative of vehicle heave, wherein one or more of the signal indicative of vehicle pitch comprises vehicle pitch data and the signal indicative of vehicle heave comprises vehicle heave data, and wherein one or more of the vehicle pitch data comprise a pitch profile over time associated with the reduced wheel load condition, the pitch data comprise an inertial pitch sensor signal, the heave data comprise a heave profile over time associated with the reduced wheel load condition, and the heave data comprise an inertial heave sensor signal, and further wherein the controller is configured to modify the traction control intervention by reducing or eliminating the traction control intervention at said one or more wheels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a signal indicative of vehicle pitch;
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11. A traction control system for a motor vehicle, the traction control system comprising an electronic controller configured to identify a wheelslip condition and initiate a traction control intervention at one or more vehicle wheels in dependence on the wheelslip condition, wherein the electronic controller is configured to modify the traction control intervention at said one or more wheels in dependence on a reduced wheel load condition in said one or more wheels, the reduced wheel load condition being identified based on at least one of:
- a signal indicative of vehicle pitch;
or a signal indicative of vehicle heave, wherein one or more of the signal indicative of vehicle pitch comprises vehicle pitch data and the signal indicative of vehicle heave comprises vehicle heave data, and the controller is configured to one or more of;
receive at least one of the pitch data and the heave data and to identify the reduced wheel load condition based on the received data;
identify the reduced wheel load condition by comparing the received data with reference data; and
compare a profile over time associated with the received data with a reference profile to identify the reduced wheel load condition, and further wherein the controller is configured to modify the traction control intervention by reducing or eliminating the traction control intervention at said one or more wheels.
- a signal indicative of vehicle pitch;
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12. A method of controlling traction at one or more wheels of a motor vehicle, the method comprising:
- identifying a wheelslip condition in said one or more wheels, identifying a reduced wheel load condition in said one or more wheels based on at least one of vehicle pitch data or vehicle heave data, wherein one or more of the vehicle pitch data comprise a pitch profile over time associated with the reduced wheel load condition, the pitch data comprise an inertial pitch sensor signal, the heave data comprise a heave profile over time associated with the reduced wheel load condition, and the heave data comprise an inertial heave sensor signal; and
determining a modified traction control intervention at said one or more wheels in dependence on the wheelslip condition and the reduced wheel load condition, wherein determining a modified traction control intervention comprises reducing or eliminating the traction control intervention at said one or more wheels. - View Dependent Claims (13, 14, 15, 16)
- identifying a wheelslip condition in said one or more wheels, identifying a reduced wheel load condition in said one or more wheels based on at least one of vehicle pitch data or vehicle heave data, wherein one or more of the vehicle pitch data comprise a pitch profile over time associated with the reduced wheel load condition, the pitch data comprise an inertial pitch sensor signal, the heave data comprise a heave profile over time associated with the reduced wheel load condition, and the heave data comprise an inertial heave sensor signal; and
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17. An electronic controller for a vehicle having a storage medium associated therewith storing instructions that when executed by the controller cause the determination of a modified traction control intervention in accordance with a method comprising:
- identifying a wheelslip condition in one or more wheels, identifying a reduced wheel load condition in said one or more wheels based on at least one of vehicle pitch data or vehicle heave data, wherein one or more of the vehicle pitch data comprise a pitch profile over time associated with the reduced wheel load condition, the pitch data comprise an inertial pitch sensor signal, the heave data comprise a heave profile over time associated with the reduced wheel load condition, and the heave data comprise an inertial heave sensor signal; and
determining a modified traction control intervention at said one or more wheels in dependence on the wheelslip condition and the reduced wheel load condition, wherein the controller is configured to modify the traction control intervention by reducing or eliminating the traction control intervention at said one or more wheels.
- identifying a wheelslip condition in one or more wheels, identifying a reduced wheel load condition in said one or more wheels based on at least one of vehicle pitch data or vehicle heave data, wherein one or more of the vehicle pitch data comprise a pitch profile over time associated with the reduced wheel load condition, the pitch data comprise an inertial pitch sensor signal, the heave data comprise a heave profile over time associated with the reduced wheel load condition, and the heave data comprise an inertial heave sensor signal; and
Specification