Method for protecting clutch of vehicle

Patent metadata

Field	Value
Publication number	US-9862387-B2
Application number	US-201615002050-A
Country	US
Kind code	B2
Filing date	Jan 20, 2016
Priority date	Sep 24, 2015
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

Disclosed is a method for protecting a vehicle clutch, including a check step for checking the mileage of a vehicle and the number of times a clutch wear compensation device is operated; after the check step, a calculation step for calculating a clutch thermal severity level, which indicates the degree of thermal severity of the clutch, based on the mileage and the number of times the wear compensation device is operated; and a control step for controlling at least one of the shifting pattern of the vehicle and engine RPM depending on the clutch thermal severity level, after the calculation step.

First claim

What is claimed is:

1. A method for protecting a vehicle clutch, comprising:
a check step in which a controller checks a mileage of a vehicle and a number of times a clutch wear compensation device is operated;
after the check step, a calculation step in which the controller calculates a clutch thermal severity level, which indicates a degree of thermal severity of the clutch, based on the mileage and the number of times the wear compensation device is operated; and
after the calculation step, a control step in which the controller controls at least one of a shifting pattern of the vehicle and revolution per minute (RPM) of engine depending on the clutch thermal severity level.

2. The method of claim 1 , wherein in the calculation step, the clutch thermal severity level is calculated to be inversely proportional to the mileage and to be proportional to the number of times the wear compensation device is operated.

3. The method of claim 1 , wherein the clutch wear compensation device operates when a variation in a clutch touch point is greater than a reference value.

4. The method of claim 1 , wherein the calculation step is performed only when the mileage of the vehicle is equal to or greater than a predetermined distance.

5. The method of claim 1 , wherein the calculation step is performed only when the number of times the wear compensation device is operated is equal to or greater than a predetermined count value.

6. The method of claim 1 , wherein in the control step, as the clutch thermal severity level is higher, the controller controls an upshifting pattern to perform upshifting at a higher speed compared to an existing upshifting pattern.

7. The method of claim 1 , wherein in the control step, as the clutch thermal severity level is higher, the controller controls a downshifting pattern to perform downshifting at a higher speed compared to an existing downshifting pattern.

8. The method of claim 1 , wherein in the control step, as the clutch thermal severity level is higher, the controller controls the engine RPM to be less than current engine RPM.

9. A method for protecting a clutch in a vehicle having an engine, a controller and a clutch wear compensation device, the method comprising:
determining, by the controller, a mileage of the vehicle;
determining, by the controller, a number of times the clutch wear compensation device has been operated;
calculating, by the controller, a clutch thermal severity level that is indicative of a degree of thermal severity of the clutch, based on the mileage and the number of times the wear compensation device has been operated; and
controlling, by the controller, at least one of a shifting pattern of the vehicle and revolution per minute (RPM) of the engine based on the calculated clutch thermal severity level.

10. The method of claim 9 , wherein the clutch thermal severity level is calculated to be inversely proportional to the mileage and to be proportional to the number of times the wear compensation device has been operated.

11. The method of claim 9 , wherein the clutch wear compensation device operates when a variation in a clutch touch point is greater than a reference value.

12. The method of claim 9 , wherein the calculation step is performed only when the mileage of the vehicle is equal to or greater than a predetermined distance.

13. The method of claim 9 , wherein the calculation step is performed only when the number of times the wear compensation device has been operated is equal to or greater than a predetermined count value.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Yoon Young Min

Classifications

• F16D2500/106

  Engine · CPC title

• B60W2710/1005

  Transmission ratio engaged · CPC title

• B60W30/186 Primary

  excessive wear or burn out of friction elements, e.g. clutches · CPC title

• F16D2500/30403

  Number of clutch actuations · CPC title

• F16D2500/30404

  Clutch temperature · CPC title