Method and system for determining a cornering angle of a tyre during the running of a vehicle
First Claim
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1. A method for determining a cornering angle of a tyre fitted on a vehicle during running of said vehicle on a rolling surface, comprising:
- determining a lateral acceleration of a portion of said tyre axially extending between a pair of sidewalls of the tyre and which is spaced a distance from an equatorial plane of said tyre;
determining a rotation speed of said tyre; and
wherein said determining the lateral acceleration comprises acquiring a lateral acceleration signal when said portion of the tyre is outside a contact region between said tyre and said rolling surface, and acquiring a lateral acceleration signal when said portion of the tyre is within said contact region; and
wherein said determining the lateral acceleration signal comprises calculating a peak value of said lateral acceleration signal within said contact region; and
determining said cornering angle from said lateral acceleration and said rotation speed.
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Abstract
A method and a system for determining a cornering angle of a tire fitted on a vehicle during a running of the vehicle on a rolling surface includes the steps of determining the lateral acceleration of a portion of the tire tread spaced apart from the equatorial plane of the tire; determining a rotation speed of the tire; and determining the cornering angle from the lateral acceleration and the radial speed by using characteristic curves of lateral acceleration amplitude versus predetermined values of cornering angle for at least one rotation speed.
25 Citations
41 Claims
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1. A method for determining a cornering angle of a tyre fitted on a vehicle during running of said vehicle on a rolling surface, comprising:
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determining a lateral acceleration of a portion of said tyre axially extending between a pair of sidewalls of the tyre and which is spaced a distance from an equatorial plane of said tyre; determining a rotation speed of said tyre; and wherein said determining the lateral acceleration comprises acquiring a lateral acceleration signal when said portion of the tyre is outside a contact region between said tyre and said rolling surface, and acquiring a lateral acceleration signal when said portion of the tyre is within said contact region; and wherein said determining the lateral acceleration signal comprises calculating a peak value of said lateral acceleration signal within said contact region; and determining said cornering angle from said lateral acceleration and said rotation speed. - View Dependent Claims (4, 5, 6, 7, 38, 39, 40, 41)
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- 2. The method according to clam 1, wherein said determining the lateral acceleration comprises calculating an average level of the lateral acceleration signal outside said contact region.
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11. A system for determining a cornering angle of a tyre fitted on a vehicle during running of said vehicle on a rolling surface, comprising:
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at least one device configured to determine a lateral acceleration of a portion of said tyre axially extending between a pair of sidewalls of said tyre, the portion being located at a distance from an equatorial plane of said tyre; wherein the lateral acceleration is acquired from a lateral acceleration signal from said portion of the tyre outside a contact region between said tyre and said rolling surface, and the lateral acceleration signal is acquired when said portion of the tyre is within said contact region; and wherein the lateral acceleration signal is calculated from a peak value of said lateral acceleration signal within said contact region; and at least one device adapted for determining a rotation speed of said tyre; and at least one processing unit being adapted to determine said cornering angle from said lateral acceleration and said rotation speed. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification