Method for determining at least one parameter representative of at least one interaction along a longitudinal direction between a tyre for vehicle and the ground
First Claim
1. A method of determining at least one main parameter representative of at least one interaction along a longitudinal direction between a tyre and ground, wherein a footprint area is defined between a first and a second longitudinal ends, comprising the following steps:
- identifying a first parameter representative of a radial deformation of said tyre;
determining a first and a second values of said first parameter in a neighbourhood of the first longitudinal end of the footprint area and in a neighbourhood of the second longitudinal end of the footprint area, respectively, wherein the first value is associated with a first time instant and the second value is associated with a second time instant;
calculating a linear combination of said first and second values, thereby obtaining a second parameter;
determining a third parameter representative of an angular velocity of said tyre;
calculating a ratio between said second and third parameters; and
calculating said main parameter starting from said ratio, according to an algorithm, which main parameter is representative of at least one interaction along a longitudinal direction between said tyre and the ground.
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Abstract
A method of determining at least one parameter representative of at least one interaction along a longitudinal direction between a tyre and the ground, includes identifying a first parameter representative of a radial deformation of the tyre; determining a first and a second value of the first parameter in respective neighbourhoods of a first and a second longitudinal end of a footprint area defined between the tyre and ground; calculating a linear combination of the values thereby obtaining a second parameter; determining a third parameter representative of an angular velocity of the tyre; calculating a ratio between the second and third parameters; and calculating a main parameter, starting from the ratio, according to an algorithm, which main parameter is representative of a longitudinal interaction between the tyre and the ground.
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Citations
52 Claims
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1. A method of determining at least one main parameter representative of at least one interaction along a longitudinal direction between a tyre and ground, wherein a footprint area is defined between a first and a second longitudinal ends, comprising the following steps:
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identifying a first parameter representative of a radial deformation of said tyre; determining a first and a second values of said first parameter in a neighbourhood of the first longitudinal end of the footprint area and in a neighbourhood of the second longitudinal end of the footprint area, respectively, wherein the first value is associated with a first time instant and the second value is associated with a second time instant; calculating a linear combination of said first and second values, thereby obtaining a second parameter; determining a third parameter representative of an angular velocity of said tyre; calculating a ratio between said second and third parameters; and calculating said main parameter starting from said ratio, according to an algorithm, which main parameter is representative of at least one interaction along a longitudinal direction between said tyre and the ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus for determining at least one main parameter which is representative of at least one interaction along a longitudinal direction between a tyre and ground, wherein a footprint area is defined between a first and a second longitudinal ends, comprising:
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a sensor to detect a detection magnitude that is representative of a radial deformation of said tyre and to generate a corresponding main signal; a processing unit operatively associated with said sensor and provided with; a reception module to receive said main signal and to determine a first parameter representative of a radial deformation of said tyre; a selection module to identify at least one first and one second value of said first parameter, said first and second values being determined in a neighbourhood of the first longitudinal end of the footprint area and in a neighbourhood of the second longitudinal end of the footprint area, respectively, wherein the first value is associated with a first time instant and the second value is associated with a second time instant; a first calculation module operatively associated with said sensor to determine a second parameter which is obtained by carrying out a linear combination of said at least two values; and a second calculation module to determine a third parameter which is at least representative of an angular velocity of said tyre; a third calculation module to carry out a ratio between said second and third parameters; a fourth calculation module to calculate said main parameter starting from said ratio, according to a predetermined algorithm, said main parameter being representative of at least one interaction along a longitudinal direction between said tyre and the ground in the footprint area. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification