Method and device for calculating magnitude of wheel-generated cornering force
First Claim
1. A computer-implemented method of calculating a magnitude of a cornering force applied to each of a plurality of wheels of a vehicle when the vehicle is cornering, each of the plurality of wheels comprising a tire, and being implemented by a computer programmed to carry out the method steps, the method comprising:
- measuring, with an electronic device, a magnitude of a centrifugal force applied to the vehicle when the vehicle is cornering, the centrifugal force being in a direction substantially orthogonal to a vehicle traveling direction;
determining, with a computer, a contact length in a wheel circumferential direction, at a contact portion of each of the plurality of wheels when the vehicle is cornering;
determining, with the computer, an amount of deformation in a wheel width direction when the vehicle is cornering, at the contact portion of each of the plurality of wheels; and
calculating, with the computer, a magnitude of a cornering force applied to each of the plurality of wheels, based on the magnitude of the centrifugal force measured with the electronics device, the contact length, and the amount of the deformation in the wheel width direction when the vehicle is cornering.
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Accused Products
Abstract
A method of calculating a cornering force to be applied to each wheel provided to a vehicle which is cornering, comprising the steps of: obtaining a magnitude of a centrifugal force to the vehicle in a direction substantially orthogonal to a vehicle traveling direction, a contact length of each wheel during the cornering of the vehicle, and an amount of deformation in a wheel width direction at the contact portion of each wheel of the vehicle, calculating a difference between the obtained amount of the deformation and an amount of deformation in the wheel width direction under a straight forward travel condition of the vehicle for each wheel, and calculating a cornering force for each wheel based on the magnitude of the centrifugal force, the contact length, and the difference between amounts of deformation in the wheel width direction.
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Citations
11 Claims
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1. A computer-implemented method of calculating a magnitude of a cornering force applied to each of a plurality of wheels of a vehicle when the vehicle is cornering, each of the plurality of wheels comprising a tire, and being implemented by a computer programmed to carry out the method steps, the method comprising:
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measuring, with an electronic device, a magnitude of a centrifugal force applied to the vehicle when the vehicle is cornering, the centrifugal force being in a direction substantially orthogonal to a vehicle traveling direction; determining, with a computer, a contact length in a wheel circumferential direction, at a contact portion of each of the plurality of wheels when the vehicle is cornering; determining, with the computer, an amount of deformation in a wheel width direction when the vehicle is cornering, at the contact portion of each of the plurality of wheels; and calculating, with the computer, a magnitude of a cornering force applied to each of the plurality of wheels, based on the magnitude of the centrifugal force measured with the electronics device, the contact length, and the amount of the deformation in the wheel width direction when the vehicle is cornering. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A cornering force calculating device for calculating a magnitude of a cornering force to be applied to each of a plurality of wheels provided to a vehicle when the vehicle is cornering, the plurality of wheels being each assembled with a tire, the cornering force calculating device comprising:
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a centrifugal force measuring means for measuring a magnitude of a centrifugal force to be applied to the vehicle which is cornering, the centrifugal force being in a direction substantially orthogonal to a vehicle traveling direction; a contact length deriving means for determining a contact length in a wheel circumferential direction, at a contact portion of each of the plurality of wheels of the vehicle which is cornering; a width direction deformation amount deriving means for determining an amount of deformation in a wheel width direction, at the contact portion of each of the plurality of wheels of the vehicle which is cornering; and a cornering force calculating means for calculating a magnitude of a cornering force generated in each of the plurality of wheels provided to the vehicle, based on the measured magnitude of the centrifugal force, the derived contact length, and the amount of the deformation in the wheel width direction.
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11. A cornering force calculating device for calculating a magnitude of a cornering force applied to each of a plurality of wheels of a vehicle when the vehicle is cornering, each of the plurality of wheels comprising a tire, the cornering force calculating device comprising:
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a sensor configured to measure a magnitude of a centrifugal force applied to the vehicle when the vehicle is cornering, the centrifugal force being in a direction substantially orthogonal to a vehicle traveling direction; and a processor configured to determine a contact length in a wheel circumferential direction, at a contact portion of each of the plurality of wheels when the vehicle is cornering, determine an amount of deformation in a wheel width direction when the vehicle is cornering, at the contact portion of each of the plurality of wheels, and calculate a magnitude of a cornering force applied to each of the plurality of wheels provided to the vehicle, based on the measured magnitude of the centrifugal force, the derived contact length, and the amount of the deformation in the wheel width direction when the vehicle is cornering.
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Specification