Method for detecting a burnout state during which driven wheels are caused to spin

• US 8,825,336 B2
• Filed: 08/15/2012
• Issued: 09/02/2014
• Est. Priority Date: 08/16/2011
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Sollart, Willem
• Primary Examiner(s): Algahaim, Helal A
• Assistant Examiner(s): WALLACE, DONALD JOSEPH
• Application Number:
  US13/586,532
• Publication Number:
  US 20130073166A1
• Time in Patent Office: 748 Days
• Field of Search: 701/84, 701/82
• US Class Current: 701/84
• CPC Class Codes: B60K 28/16 responsive to, or preventing, skidding of wheels brake control systems for vehicle drive stability B60T8/1755; arrangements responsive to a speed condition for adjusting wheel braking force B60T8/32; control of vehicle driving stability otherwise than by controlling the propulsion unit only B60W30/02; preventing wheel slippage by reducing power in rail vehicles B61C15/00
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/16 Axle differentials, e.g. for dividing torque between left and right wheels
• CPC Class Codes: B60W 10/182 including control of parking brakes
• CPC Class Codes: B60W 2510/0638 Engine speed
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2520/28 Wheel speed
• CPC Class Codes: B60W 2710/0677 Engine power
• CPC Class Codes: B60W 30/18009 related to particular drive situations
• CPC Class Codes: B60W 30/184 Preventing damage resulting from overload or excessive wear of the driveline
• CPC Class Codes: B60W 40/09 Driving style or behaviour

Abstract

A method for detecting a burnout state during which driven wheels of a motor vehicle are caused to spin is provided. The method includes detecting a rotational wheel speed of a first driven wheel and a rotational wheel speed of a second driven wheel and comparing the rotational wheel speed of the faster turning wheel with a first constant. A vehicle speed is detected and compared with a second constant. An engine rotational speed is detected and compared with a third constant. The burnout state is detected when the rotational wheel speed of the faster turning wheel is greater than the first constant, the vehicle speed is less than the second constant, and the engine rotational speed is greater than the third constant.

Claims

1. A method for detecting a burnout state during which driven wheels of a motor vehicle are caused to spin, the method comprising the steps of:

detecting a rotational wheel speed of a first driven wheel and a rotational wheel speed of a second driven wheel, determining the difference between the rotational wheel speed of the first driven wheel and the rotational wheel speed of the second driven wheel, and comparing, in a control unit, the absolute value of the difference with a first constant,

detecting a vehicle speed and comparing, in the control unit, the vehicle speed with a second constant, wherein the second constant is less than or equal to about 5 km/h, and

detecting an engine rotational speed and comparing, in the control unit, the engine rotational speed with a third constant,

wherein the burnout state is detected if and only if

the absolute value of the difference between the rotational wheel speed of the first driven wheel and the rotational wheel speed of the second driven wheel is greater than or equal to the first constant,

the vehicle speed is less than or equal to the second constant, and

the engine rotational speed is greater than or equal to the third constant.

2. The method according to claim 1, wherein in a detected burnout state a bit is set.

3. The method according to claim 1, wherein in the burnout state an engine power is steadily reduced to a lower value.

4. The method according to claim 1, wherein in the burnout state an engine power is reduced via a reduction of the engine rotational speed.

5. The method according to claim 1, wherein in the burnout state an engine power is reduced via a reduction of an engine torque.

6. The method according to claim 1, wherein the burnout state is stored in a fault memory.

7. The method according to claim 1, wherein a duration of the burnout state is stored in an fault memory.

8. The method according to claim 1, wherein from a certain time duration, during which the burnout state prevailed, a fault memory code lamp is activated.

9. The method according to claim 1, the method further comprising the step of:

detecting if a parking brake is activated or pulled; and

wherein the burnout state is detected when the absolute value of the difference between the rotational wheel speed of the first driven wheel and the rotational wheel speed of the second driven wheel is greater than or equal to the first constant, the vehicle speed is less than or equal to the second constant, the engine rotational speed is greater than or equal to the third constant, and the parking brake is activated or pulled.

10. The method according to claim 1, the method further comprising the step of:

detecting if an anti-slip control is deactivated, and

wherein the burnout state is detected when the absolute value of the difference between the rotational wheel speed of the first driven wheel and the rotational wheel speed of the second driven wheel is greater than or equal to the first constant, the vehicle speed is less than or equal to the second constant, the engine rotational speed is greater than or equal to the third constant, and the anti-slip control is deactivated.

11. The method according to claim 1, the method further comprising the step of:

detecting an engine torque.

13. The method of claim 1, wherein second constant is between about 1 km/h and about 5 km/h.

14. The method of claim 1, wherein second constant is less than or equal to about 1 km/h.

12. A motor vehicle having a control unit comprising a storage device with a computer program stored thereon, wherein the computer program is configured for carrying out a method for detecting a burnout state during which driven wheels of the motor vehicle are caused to spin, the method comprising the steps of:

detecting a rotational wheel speed of a first driven wheel and a rotational wheel speed of a second driven wheel, determining the difference between the rotational wheel speed of the first driven wheel and the rotational wheel speed of the second driven wheel, and comparing the absolute value of the difference with a first constant,

detecting a vehicle speed and comparing the vehicle speed with a second constant, wherein the second constant is less than or equal to about 5 km/h, and

detecting an engine rotational speed and comparing the engine rotational speed with a third constant,

wherein the burnout state is detected if and only if

the absolute value of the difference between the rotational wheel speed of the first driven wheel and the rotational wheel speed of the second driven wheel is greater than or equal to the first constant,

the vehicle speed is less than or equal to the second constant, and

the engine rotational speed is greater than or equal to the third constant.