Vehicle control system and method to provide desired wheel slip
AssigneeJaguar Land Rover Limited
InventorsPaul Beever, Michael Blyth
Life of this patent
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Abstract
The invention relates to a control system and methods for controlling motion of a vehicle over a surface. The control system limits an amount of drive torque that may be applied to one or more wheels of the vehicle to prevent an amount of wheel slip from exceeding a prescribed value. The prescribed value of wheel slip is determined in dependence at least in part on vehicle speed. In addition, method claims 28 and 29 are directed to providing drive torque, independent of vehicle speed, which corresponds to or exceeds the maximum traction force. These methods are suitable for highway driving with high friction or off road driving on soft terrain, respectively.
Claims26
A control system that controls motion of a vehicle over a surface, the control system being operable to limit an amount of drive torque that may be applied to one or more wheels of the vehicle that are arranged to be driven to a prescribed torque value so as to prevent an amount of wheel slip from exceeding a prescribed value of wheel slip, wherein the prescribed value of wheel slip is determined in dependence at least in part on vehicle speed, and wherein the control system is operable to limit a rate of increase of applied drive torque to a prescribed maximum value as the value of applied drive torque increases toward the prescribed torque value.
(canceled)
-6. (canceled)
(canceled)
(canceled)
-20. (canceled)
A vehicle comprising a control system that controls motion of the vehicle over a surface, the control system being operable to limit an amount of drive torque that may be applied to one or more wheels of the vehicle that are arranged to be driven to a prescribed torque value so as to prevent an amount of wheel slip from exceeding a prescribed value of wheel slip, wherein the prescribed value of wheel slip is determined in dependence at least in part on vehicle speed, and wherein the control system is operable to limit a rate of increase of applied drive torque to a prescribed maximum value as the value of applied drive torque increases toward the prescribed torque value.
A method of controlling motion of a vehicle over a driving surface via a control system, the method comprising:
- limiting an amount of drive torque that may be applied to one or more driven wheels of the vehicle to a prescribed torque value so as to prevent an amount of wheel slip from exceeding a prescribed value;
- determining the prescribed value of wheel slip in dependence at least in part on vehicle speed;
- and
- limiting a rate of increase of applied drive torque to a prescribed maximum value as the value of applied drive torque increases toward the prescribed torque value.
28-30. (canceled)
Dependencies are inferred from the claim text.