Slip-Control Method and Device

• US 20070289795A1
• Filed: 02/24/2005
• Published: 12/20/2007
• Est. Priority Date: 02/27/2004
• Status: Active Grant

• Current Assignee: Michelin Recherche et Technique SA (Compagnie Generale DES Etablissements Michelin SCA)
• Original Assignee: Michelin Recherche et Technique SA (Compagnie Generale DES Etablissements Michelin SCA)
• Inventors: Fandard, Gerard, Mousty, Herve
• Granted Patent: US 7,725,235 B2
• Time in Patent Office: Days
• US Class Current: 180/197
• CPC Class Codes: B60C 23/20 Devices for measuring or signalling tyre temperature only
• CPC Class Codes: B60T 2210/12 Friction
• CPC Class Codes: B60T 8/172 Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters B60T8/17551 takes precedence
• CPC Class Codes: B60T 8/17616 Microprocessor-based systems

Abstract

A method for controlling the slip of a tire (1) of an automobile, said tire comprising a tread (3). The method comprises adjusting said slip using the measurement of a variable linked to the surface temperature (T₂) of the tread in the contact area (2) of the tire.

Claims

1. A method for controlling the slip of a tire (1) of an automobile, said tire comprising a tread (3), said method comprising adjusting said slip using the measurement of a variable linked to the surface temperature (T₂) of the tread in the contact area (2) of the tire.

2. A control method according to claim 1, in which said linked variable is the surface temperature (T₃) of the tread (3), this variable being measured outside the contact area of the tire.

3. A control method according to claim 2, in which the surface temperature (T₃) of the tread is measured in the vicinity of the exit from the contact area of the tire.

4. A control method according to claim 2, in which the measurement of the surface temperature of the tread is an optical measurement.

5. A control method according to claim 2, further comprising a step of acquisition of calibration data, said step consisting of recording a series of measurements of said linked variable and a corresponding series of measurements of forces or accelerations to which the vehicle is subjected in order to determine a preferred value of the calculation data used in controlling the slip.

6. A device for controlling the slip of a tire of an automobile, said device comprising a means capable of adjusting the slip and a means (4) for measuring a variable linked to the surface temperature (T₂) of the tread of said tire in the contact area.

7. A device according to claim 6, in which the means capable of adjusting the slip comprises a means for controlling the torque supplied by the vehicle engine to the wheel.

8. A device according to claim 6, in which the means capable of adjusting the slip comprises a management system for the braking power or the braking torque of the wheel.

9. A device according to claim 6, in which the means for measuring the linked variable is an optical means (4) for measuring the temperature (T₃) of the tread outside the contact area (2).

10. A device according to claim 9, in which the optical measurement means is a thermal camera (4) placed opposite the exit from the contact area.

11. A device according to claim 6, further comprising a means for measuring the acceleration of the vehicle.