Controlling vehicle creep
First Claim
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1. A method for controlling vehicle creep, comprising:
- (a) if desired creep speed exceeds vehicle speed while an accelerator pedal is released, controlling motor speed to produce the desired creep speed;
(b) if desired motor torque exceeds actual motor torque, controlling motor torque to produce the desired motor torque;
(c) if vehicle speed is decreasing and exceeds the desired speed while the accelerator pedal is released, controlling motor torque to decelerate the vehicle to desired creep speed.
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Abstract
A method for controlling vehicle creep includes controlling motor speed to produce the desired creep speed, if desired creep speed exceeds vehicle speed; controlling motor torque to produce the desired wheel torque, if desired wheel torque exceeds actual wheel torque; and controlling motor torque to decelerate the vehicle to creep speed, if vehicle speed is decreasing and exceeds the desired speed.
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Citations
24 Claims
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1. A method for controlling vehicle creep, comprising:
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(a) if desired creep speed exceeds vehicle speed while an accelerator pedal is released, controlling motor speed to produce the desired creep speed; (b) if desired motor torque exceeds actual motor torque, controlling motor torque to produce the desired motor torque; (c) if vehicle speed is decreasing and exceeds the desired speed while the accelerator pedal is released, controlling motor torque to decelerate the vehicle to desired creep speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for controlling vehicle creep, comprising:
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(a) controlling motor speed to produce a desired creep speed, if desired creep speed exceeds vehicle speed; (b) controlling motor torque to produce the desired motor torque, if desired motor torque exceeds actual motor torque; (c) controlling motor torque to decelerate the vehicle to creep speed, if vehicle speed is decreasing and exceeds the desired speed. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for controlling vehicle creep, comprising:
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(a) producing signals representing desired creep speed, vehicle speed, a depressed and released state of an accelerator pedal, actual motor torque; (b) if any of said signals indicates that desired creep speed exceeds vehicle speed while the accelerator pedal is released, controlling motor speed to produce the desired creep speed; (c) if desired motor torque exceeds actual motor torque, controlling motor torque to produce the desired motor torque; (d) if any of the signals indicates that vehicle speed is decreasing and exceeds the desired creep speed while the accelerator pedal is released, controlling motor torque to decelerate the vehicle to the desired creep speed.
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24. A method for controlling vehicle creep, comprising:
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(a) producing signals representing desired creep speed, vehicle speed, desired motor torque, and actual motor torque; (b) if any of said signals indicates that desired creep speed exceeds vehicle speed, controlling motor speed to produce the desired creep speed; (c) if any of said signals indicates that desired motor torque exceeds actual motor torque, controlling motor torque to produce the desired motor torque; (d) if any of said signals indicates that vehicle speed is decreasing and exceeds the desired creep speed, controlling motor torque to decelerate the vehicle to the desired creep speed.
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Specification