Control apparatus for vehicle
First Claim
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1. A control apparatus for a vehicle, comprising:
- resonance frequency detecting means for detecting each of resonance frequencies generated in tires of a plurality of wheels when a vehicle travels;
gain detecting means for detecting a gain of the resonance frequency of each tire, which is detected by the resonance frequency detecting means; and
vehicle body load estimating means for estimating a vehicle body load of the vehicle based on the gain of the resonance frequency extracted from each of the tires by the gain detecting means.
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Abstract
A wheel load of each wheel or a vehicle body load is estimated based on a gain of a resonance frequency of a tire, and the estimated wheel load or vehicle body load is applied to a braking control or an acceleration control. Further, a ground contact load of each wheel or the vehicle body load of the vehicle is estimated based on the gain of the resonance frequency extracted from each of the tires for use in a vehicle control.
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Citations
27 Claims
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1. A control apparatus for a vehicle, comprising:
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resonance frequency detecting means for detecting each of resonance frequencies generated in tires of a plurality of wheels when a vehicle travels; gain detecting means for detecting a gain of the resonance frequency of each tire, which is detected by the resonance frequency detecting means; and vehicle body load estimating means for estimating a vehicle body load of the vehicle based on the gain of the resonance frequency extracted from each of the tires by the gain detecting means. - View Dependent Claims (3, 4, 5, 25)
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2. A control apparatus for a vehicle, comprising:
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wheel speed detecting means for detecting a wheel speed of each of a plurality of wheels when a vehicle travels; resonance frequency detecting means for detecting a resonance frequency generated in a tire of each of the wheels based on a wheel speed signal corresponding to each wheel detected by the wheel speed detecting means; gain detecting means for detecting a gain of the resonance frequency of each tire detected by the resonance frequency detecting means; wheel ground contact load estimating means for estimating a ground contact load of each wheel based on the gain of the resonance frequency of each tire detected by the gain detecting means; and vehicle body load estimating means for estimating a vehicle body load based on the ground contact load of each wheel estimated by the wheel ground contact load estimating means. - View Dependent Claims (24)
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6. A control apparatus for a vehicle, comprising:
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wheel speed detecting means for detecting each of wheel speeds of a plurality of wheels when a vehicle travels; resonance frequency detecting means for detecting a resonance frequency generated in a tire of each wheel based on a wheel speed signal corresponding to each wheel detected by the wheel speed detecting means; gain detecting means for detecting a gain of the resonance frequency of each tire detected by the resonance frequency detecting means; wheel ground contact load ratio estimating means for estimating a ground contact load ratio of each wheel based on the gain of each tire detected by the gain detecting means; and control means for executing at least one of a braking control, an acceleration control, a power steering control, and a driving force control of a vehicle in accordance with the ground contact load ratio estimated by the wheel ground contact load ratio estimating means. - View Dependent Claims (7, 16, 17)
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8. A control apparatus for a vehicle, comprising:
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wheel speed detecting means for detecting each of wheel speeds of a plurality of wheels when a vehicle travels; means for detecting a pitch as a vibration synchronized with rotation of each wheel based on a wheel speed signal corresponding to each wheel detected by the wheel speed detecting means; gain detecting means for detecting a gain of a fluctuation in the pitch; wheel ground contact load ratio estimating means for estimating a ground contact load ratio of each wheel based on the gain of each tire detected by the gain detecting means; and control means for executing at least one of a braking control, an acceleration control, a power steering control, and a driving force control of a vehicle in accordance with the ground contact load ratio of each wheel estimated by the wheel ground contact load ratio estimating means.
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9. A control apparatus for a vehicle, comprising:
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wheel speed detecting means for detecting each of wheel speeds of a plurality of wheels when a vehicle travels; resonance frequency detecting means for detecting a resonance frequency generated in a tire of each wheel based on a wheel speed signal corresponding to each wheel detected by the wheel speed detecting means; gain detecting means for detecting a gain of the resonance frequency of each tire detected by the resonance frequency detecting means; wheel ground contact load equivalent value calculating means for calculating an equivalent value which is equivalent to a ground contact load of each wheel based on the gain of each tire detected by the gain detecting means; ground contact load ratio estimating means for estimating a ground contact load ratio of wheels in accordance with the ground contact load equivalent value of the wheel; and control means for executing at least one of a braking control, an acceleration control, a power steering control, and a driving force control of a vehicle in accordance with the ground contact load ratio of each wheel estimated by the wheel ground contact load ratio estimating means. - View Dependent Claims (10, 11, 12, 13, 14, 15, 18, 19, 20, 21, 22, 23)
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26. A control apparatus for a vehicle, comprising:
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gain detecting means for detecting a gain of a resonance frequency generated in a tire of each of a plurality of wheels when a vehicle travels; and vehicle body load estimating means for estimating the vehicle body load of the vehicle based on the gain of the resonance frequency extracted from each of the tires by the gain detecting means.
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27. A control apparatus for a vehicle, comprising:
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wheel speed detecting means for detecting each of wheel speeds of a plurality of wheels when a vehicle travels; gain detecting means for detecting a gain of a resonance frequency generated in a tire of each wheel based on a wheel speed signal corresponding to each wheel detected by the wheel speed detecting means; wheel ground contact load ratio estimating means for estimating a ground contact load ratio of each wheel based on the gain of each tire detected by the gain detecting means; and control means for executing at least one of a braking control, an acceleration control, a power steering control, and a driving force control of a vehicle in accordance with the ground contact load ratio estimated by the wheel ground contact load ratio estimating means.
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Specification