Vehicle speed control system
First Claim
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1. A vehicle speed control system for a vehicle having a plurality of wheels, the vehicle speed control system comprising:
- an input device for receiving a user input of a target speed at which the vehicle is intended to travel; and
a vehicle controller for commanding application of torque to one or more wheels of the vehicle,wherein the system is configured such that when the system is required to accelerate the vehicle to achieve the target speed and the system detects a wheel slip event, the system is operable to temporarily suspend an increase in net torque applied to one or more wheels until the system lifts the suspension of the increase in net torque and, when the suspension of the increase in net torque is lifted, the system is operable automatically to inhibit slip by resuming the increase in net torque applied to the one or more wheels, at a rate limited to being equal to or less than a rate of increase of net torque applied to the one or more wheels when the wheel slip event was detected.
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Abstract
A vehicle speed control system for a vehicle having a plurality of wheels, the vehicle speed control system comprising: means for receiving a user input of a target speed at which the vehicle is intended to travel; and means for commanding application of torque to one or more wheels of the vehicle, wherein the system is configured such that when it is required to accelerate the vehicle to achieve the target speed and the system detects a wheel slip event, the system is operable temporarily to suspend an increase in net torque applied to one or more wheels.
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Citations
24 Claims
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1. A vehicle speed control system for a vehicle having a plurality of wheels, the vehicle speed control system comprising:
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an input device for receiving a user input of a target speed at which the vehicle is intended to travel; and a vehicle controller for commanding application of torque to one or more wheels of the vehicle, wherein the system is configured such that when the system is required to accelerate the vehicle to achieve the target speed and the system detects a wheel slip event, the system is operable to temporarily suspend an increase in net torque applied to one or more wheels until the system lifts the suspension of the increase in net torque and, when the suspension of the increase in net torque is lifted, the system is operable automatically to inhibit slip by resuming the increase in net torque applied to the one or more wheels, at a rate limited to being equal to or less than a rate of increase of net torque applied to the one or more wheels when the wheel slip event was detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for a vehicle having a plurality of wheels, the vehicle control system comprising:
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a powertrain and a brake system controller for applying torque to at least one of the plurality of wheels; a traction control system controller for detecting a wheel slip event between any one or more of the plurality of the wheels and ground over which the vehicle is travelling when the vehicle is in motion and for providing a slip detection output signal in the wheel slip event; and an input device for receiving a user input of a target speed at which the vehicle is intended to travel, wherein the system is configured such that when the system is required to accelerate the vehicle to achieve the target speed and the system detects the wheel slip event, the system is operable to temporarily suspend an increase in net torque applied to the at least one wheel of the vehicle until the wheel slip event is no longer detected and, when the suspension of the increase in net torque is lifted, the system is operable automatically to inhibit slip by resuming the increase in net torque applied to the at least one wheel, at a rate limited to being equal to or less than a rate of increase of net torque applied to the at least one wheel when the wheel slip event was detected.
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21. A vehicle speed control system for a vehicle having a plurality of wheels, the vehicle speed control system comprising:
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an input device for receiving a user input of a target speed at which the vehicle is intended to travel; and a vehicle controller for commanding application of torque to one or more wheels of the plurality of wheels of the vehicle, wherein the system is configured such that when the system is required to accelerate the vehicle to achieve the target speed and a wheel slip event is detected, the system is operable to temporarily suspend an increase in net torque applied to the one or more wheels and to maintain a value of net applied torque substantially equal to that which the vehicle was traveling until the system lifts the suspension of the increase in net torque and, when the suspension of the increase in net torque is lifted, the system is operable automatically to inhibit slip by resuming the an increase in net torque applied to the one or more wheels, at a rate limited to being equal to or less than a rate of increase of net torque applied to the one or more wheels when the wheel slip event was detected.
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22. A vehicle, comprising:
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a speed control system, the speed control system including; an input device for receiving a user input of a target speed at which the vehicle is intended to travel; and a vehicle controller for commanding application of torque to one or more wheels of the vehicle, wherein the system is configured such that when the system is required to accelerate the vehicle to achieve the target speed and the system detects a wheel slip event, the system is operable to temporarily suspend an increase in net torque applied to one or more wheels until the system lifts the suspension of the increase in net torque and, when the suspension of the increase in net torque is lifted, the system is operable automatically to inhibit slip by resuming the increase in net torque applied to the one or more wheels, at a rate not exceeding a rate of increase of net torque applied to the one or more wheels when the wheel slip event was detected.
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23. A method of controlling a speed of a vehicle having a plurality of wheels, the method comprising:
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applying torque to at least one of the plurality of wheels; detecting, by a vehicle controller, a wheel slip event between any one or more of the plurality of wheels and a ground over which the vehicle is travelling when the vehicle is in motion and providing a slip detection output signal in the wheel slip event; receiving a user input of a target speed at which the vehicle is intended to travel; and accelerating, by the vehicle controller, the vehicle to achieve the target speed, whereby in an event that the wheel slip event is detected, the method comprises suspending temporarily further increase in net torque applied to the at least one of the plurality of wheels until the wheel slip event is no longer detected, and when the wheel slip event is no longer detected, inhibiting slip by lifting the suspension and by automatically resuming an increase in net torque applied to the at least one of the plurality of wheels, at a rate not exceeding a rate of increase of net torque applied to the at least one of the plurality of wheels when the wheel slip event was detected. - View Dependent Claims (24)
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Specification