VEHICLE CONTROL DEVICE AND METHOD
First Claim
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1. A vehicle control system, comprising:
- a sprung mass behavior detecting means that detects change in sprung mass behavior of a vehicle;
a power source that outputs a driving force based on a driving force control to suppress the change in the sprung mass behavior;
a damping force variable shock absorber that outputs a damping force based on a damping force control to suppress the change in the sprung mass behavior;
a stroke speed detecting means that detects a stroke speed of the damping force variable shock absorber; and
a damping force control amount calculation means that calculates a damping force control amount based on the damping force control within a range of a damping force variable region with a predetermined width prescribed by a saturation degree, in which the saturation degree of the damping force variable region of the damping force variable shock absorber is set lower when the stroke speed is equal to a predetermined value or less than when the stroke speed is greater than the predetermined value.
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Abstract
A power source attitude control is performed to suppress changes in the sprung mass behavior of a vehicle, and damping force control for damping force variable shock absorbers is performed to suppress changes in the sprung mass behavior. When the stroke speed is low, the saturation degree of the damping force variable shock absorbers is set smaller than the saturation degree when the stroke speed is high.
29 Citations
30 Claims
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1. A vehicle control system, comprising:
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a sprung mass behavior detecting means that detects change in sprung mass behavior of a vehicle; a power source that outputs a driving force based on a driving force control to suppress the change in the sprung mass behavior; a damping force variable shock absorber that outputs a damping force based on a damping force control to suppress the change in the sprung mass behavior; a stroke speed detecting means that detects a stroke speed of the damping force variable shock absorber; and a damping force control amount calculation means that calculates a damping force control amount based on the damping force control within a range of a damping force variable region with a predetermined width prescribed by a saturation degree, in which the saturation degree of the damping force variable region of the damping force variable shock absorber is set lower when the stroke speed is equal to a predetermined value or less than when the stroke speed is greater than the predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 12, 13, 14, 30)
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9. A vehicle control device, comprising:
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a sprung mass behavior detecting means that detects change in sprung mass behavior of a vehicle; a power source that outputs a driving force based on a driving force control to suppress the change in the sprung mass behavior; a damping force variable shock absorber that outputs a damping force based on a damping force control to suppress the change in the sprung mass behavior; a stroke speed detecting means that detects a stroke speed of the damping force variable shock absorber; and a damping force control amount calculation means that calculates a damping force control amount based on the damping force control within a range of the damping force variable region with a predetermined width prescribed by a saturation degree, in which the saturation degree of the damping force variable region of the damping force variable shock absorber is set lower as the stroke speed decreases when the stroke speed is equal to a predetermined value or less, wherein, at least when the stroke speed is equal to the predetermined value or less, the power source is configured to output the driving force based on the driving force control and the damping force variable shock absorber is configured to output the damping force corresponding to the damping force control amount calculated by the damping force control amount calculation means to thereby suppress the change in the sprung mass behavior.
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10. A vehicle control device, comprising:
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a sprung mass behavior detecting means that detects change in sprung mass behavior of a vehicle; a power source that outputs a driving force based on a driving force control to suppress the change in the sprung mass behavior; a damping force variable shock absorber that outputs a damping force based on a damping force control to suppress the change in the sprung mass behavior; a stroke speed detecting means that detects a stroke speed of damping force variable shock absorber; and a damping force control amount calculation means that calculates a damping force control amount based on the damping force control within a range of the damping force variable region with a predetermined width prescribed to the saturation degree in which the saturation degree of the damping force variable region of damping force variable shock absorber is set equal to or lower than a predetermined saturation degree when the stroke speed is equal to or less than a predetermined value, wherein, at least when the stroke speed is equal to the predetermined value or less, the power source is configured to output the driving force based on the driving force control and damping force variable shock absorber is configured to output the damping force corresponding to the damping force control amount calculated by the damping force control amount calculation means to thereby suppress the change in the sprung mass behavior.
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11. (canceled)
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15. A vehicle control method comprising:
when a stroke speed of a damping force variable shock absorber configured to perform damping force control for suppressing changes in a sprung mass behavior is equal to a predetermined value or less, setting a saturation degree of a damping force variable region lower than a saturation degree when the stroke speed is greater than the predetermined value so that, while the damping force control is being performed within a range of the damping force variable region with a predetermined width prescribed to the saturation degree, the driving force control is performed to suppress changes in the sprung mass behavior by a power source.
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16. A vehicle control device, comprising:
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a sprung mass behavior detecting means that detects change in sprung mass behavior of a vehicle; a damping force variable shock absorber that outputs a damping force based on a damping force control to suppress the change in the sprung mass behavior; a stroke speed detecting means that detects a stroke speed of the damping force variable shock absorber; and a damping force control means that outputs to the damping force variable shock absorber a damping force based on the damping force control within a range of the damping force variable region with a predetermined width prescribed to a saturation degree in which the saturation degree of the damping force variable region of the damping force variable shock absorber during non-turn and the stroke speed is equal to or less than a predetermined value is lower than the saturation degree when the stroke speed is greater than the predetermined value, and the damping force variable region is set in a region offset to a low damping force side damping characteristics. - View Dependent Claims (17, 18, 19)
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20. A vehicle control device, comprising:
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a sprung mass behavior detecting means that detects change in sprung mass behavior of a vehicle; a damping force variable shock absorber that outputs a damping force based on a damping force control to suppress the change in the sprung mass behavior; a stroke speed detecting means that detects a stroke speed of the damping force variable shock absorber based on a wheel speed; and a damping force control means that outputs to the damping force variable shock absorber the damping force based on the damping force control within a region of the damping force variable region with a predetermined width prescribed by the saturation degree, wherein the saturation degree of the damping force variable region of the damping force variable shock absorber is set lower when the stroke speed is equal to or less than a predetermined value than the saturation degree when the stroke speed is greater than the predetermined value. - View Dependent Claims (21, 22)
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23. A vehicle control device, comprising:
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a sprung mass behavior detecting means that detects change in sprung mass behavior of a vehicle; a damping force variable shock absorber that outputs a damping force based on a damping force control to suppress the change in the sprung mass behavior; a stroke speed detecting means that detects a stroke speed of the damping force variable shock absorber; and a damping force control means that output to the damping force variable shock absorber the damping force based on the damping force control within a region of the damping force variable region with a predetermined width prescribed by a saturation degree in which the saturation degree of the damping force variable region of the damping force variable shock absorber is set lower as the stroke speed decreases when the stroke speed is equal to a predetermined value or less.
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24. (canceled)
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25. (canceled)
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26. A vehicle control device, comprising:
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a sprung mass behavior detecting means that detects change in sprung mass behavior of a vehicle; a damping force variable shock absorber that outputs a damping force based on a damping force control to suppress the change in the sprung mass behavior; a stroke speed detecting means that detects a stroke speed of the damping force variable shock absorber; and a damping force control amount calculation means that causes the damping force variable shock absorber to output a damping force based on the damping force control within a range of the damping force variable region with a predetermined width prescribed to a saturation degree in which the saturation degree of the damping force variable region of the damping force variable shock absorber where an amplitude of the stroke speed is smaller than a sprung mass resonance amplitude detected at a sprung mass resonance frequency is set lower than the saturation degree at the sprung mass resonance amplitude.
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27. A vehicle control device, comprising:
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a sprung mass behavior detecting means that detects change in sprung mass behavior of a vehicle; a damping force variable shock absorber that outputs a damping force based on a damping force control to suppress the change in the sprung mass behavior; a stroke speed detecting means that detects a stroke speed of the damping force variable shock absorber; and a damping force control amount calculation means that causes the damping force variable shock absorber to output a damping force based on the damping force control within a range of the damping force variable region with a predetermined width prescribed to a saturation degree in which the saturation degree of the damping force variable region of the damping force variable shock absorber where an amplitude of the stroke speed is smaller than an unsprung mass resonance amplitude detected at an unsprung mass resonance frequency is set lower than the saturation degree at the unsprung mass resonance amplitude.
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28. A vehicle control device, comprising:
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a sprung mass behavior detecting means that detects change in sprung mass behavior of a vehicle; a damping force variable shock absorber that outputs a damping force based on a damping force control to suppress the change in the sprung mass behavior; a stroke speed detecting means that detects a stroke speed of the damping force variable shock absorber; and a damping force control amount calculation means that causes the damping force variable shock absorber to output a damping force based on the damping force control within a range of the damping force variable region with a predetermined width prescribed to a saturation degree in which the saturation degree of the damping force variable region of the damping force variable shock absorber where an amplitude of the stroke speed is at a predetermined amplitude detected at a predetermined frequency region between a sprung resonance frequency and an unsprung mass resonance frequency is smaller than the saturation degree with a resonance amplitude detected at either the sprung mass resonance amplitude or at the unsprung mass resonance amplitude. - View Dependent Claims (29)
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Specification