Method and apparatus for correcting physical slip and wear coefficient of clutch

Patent metadata

Field	Value
Publication number	US-11028887-B2
Application number	US-201916965142-A
Country	US
Kind code	B2
Filing date	Jan 30, 2019
Priority date	Jan 31, 2018
Publication date	Jun 8, 2021
Grant date	Jun 8, 2021

Abstract

A method and apparatus for correcting a physical slip and wear coefficient of a clutch comprising obtaining a torque difference according to a positional relation between an engine and the clutch; obtaining a correction weight value corresponding to an engine torque according to the torque difference; and correcting the physical slip and wear coefficient according to the correction weight value and a running-in state of the clutch. The method relates to obtaining a torque difference in real time by means of a positional relation between the engine and the clutch in a manner corresponding to the positional relation, obtaining a correction weight value corresponding to the engine torque according to the torque difference, and further correcting the physical slip and wear coefficient by combining the correction weight value and a running-in state of the clutch.

First claim

What is claimed is:

1. A method for correcting physical slip and wear coefficient of clutch, comprising:
acquiring a torque difference according to a positional relationship between an engine and a clutch;
acquiring a correction weight corresponding to an engine torque according to the torque difference; and
correcting a physical slip and wear coefficient according to the correction weight and a running-in state of the clutch;
wherein before the step of acquiring a torque difference according to a positional relationship between an engine and a clutch, the method for correcting physical slip and wear coefficient of clutch further comprises:
determining whether a vehicle meets a preset condition according to a state parameter of the vehicle; and
when the vehicle meets the preset condition, acquiring a state duration; and
the step of acquiring a torque difference according to a positional relationship between an engine and a clutch comprises:
when the state duration is not less than a preset time, acquiring the torque difference according to the positional relationship between the engine and the clutch.

2. The method for correcting physical slip and wear coefficient of clutch according to claim 1 , wherein the step of acquiring a torque difference according to a positional relationship between an engine and a clutch comprises:
acquiring a variation of an angle between an engine end and an input end of the clutch; and
when the variation is less than a preset threshold, calculating the torque difference according to the engine torque, a torque of a going clutch, and a torque of a coming clutch.

3. The method for correcting physical slip and wear coefficient of clutch according to claim 2 , wherein the step of acquiring a torque difference according to a positional relationship between an engine and a clutch further comprises:
when the variation is greater than or equal to the preset threshold, calculating the torque difference according to a rotational inertia and an angular acceleration of the engine end.

4. The method for correcting physical slip and wear coefficient of clutch according to claim 1 , wherein the step of acquiring a correction weight corresponding to an engine torque according to the torque difference comprises:
determining a torque interval corresponding to the engine torque according to the engine torque; and
selecting a correction weight corresponding to the torque difference from at least one correction weight corresponding to the torque interval.

5. The method for correcting physical slip and wear coefficient of clutch according to claim 1 , wherein the step of correcting a physical slip and wear coefficient according to the correction weight and a running-in state of the clutch comprises:
correcting the running-in state of the clutch according to the correction weight, and obtaining a corrected running-in state; and
interpolating between a physical slip and wear coefficient of a new clutch and a physical slip and wear coefficient of a clutch after running-in according to the corrected running-in state, and obtaining a corrected physical slip and wear coefficient.

6. The method for correcting physical slip and wear coefficient of clutch according to claim 1 , wherein the preset condition comprises at least one of the following:
a vehicle gear is higher than or equal to a preset gear;
an oil temperature is in a preset temperature interval; and
a micro-slip and wear integral control torque of the vehicle is less than a preset torque.

7. The method for correcting physical slip and wear coefficient of clutch according to claim 6 , wherein the preset temperature interval is from 40° C. to 90° C.

8. The method for correcting physical slip and wear coefficient of clutch according to claim 7 , wherein the preset torque ranges from 3% to 10% of the engine torque.

9. A computer program, comprising a computer-readable code which, when executed by a computing processing device, causes the computing processing device to perform the method for correcting physical slip and wear coefficient of clutch according to claim 1 .

10. A computer-readable medium, storing the computer program according to claim 9 .

11. A computing processing device for correcting physical slip and wear coefficient of clutch, wherein the computing processing device comprises a processor and a memory, wherein the memory stores a program code for implementing the operations of:
acquiring a torque difference according to a positional relationship between an engine and a clutch;
acquiring a correction weight corresponding to an engine torque according to the torque difference; and
correcting a physical slip and wear coefficient according to the correction weight and a running-in state of the clutch;
wherein the memory further stores a program code for implementing the operations of
determining whether a vehicle meets a preset condition according to a state parameter of the vehicle; and
when the vehicle meets the preset condition, acquiring a state duration; and
the operation of acquiring a torque difference according to a positional relationship between an engine and a clutch comprises:
when the state duration is not less than a preset time, acquiring the torque difference according to the positional relationship between the engine and the clutch.

12. The computing processing device for correcting physical slip and wear coefficient of clutch according to claim 11 , wherein the operation of acquiring a torque difference according to a positional relationship between an engine and a clutch comprises:
acquiring a variation of an angle between an engine end and an input end of the clutch; and
when the variation is less than a preset threshold, calculating the torque difference according to the engine torque, a torque of a going clutch, and a torque of a coming clutch.

13. The computing processing device for correcting physical slip and wear coefficient of clutch according to claim 12 , wherein the operation of acquiring a torque difference according to a positional relationship between an engine and a clutch further comprises:
when the variation is greater than or equal to the preset threshold, calculating the torque difference according to a rotational inertia and an angular acceleration of the engine end.

14. The computing processing device for correcting physical slip and wear coefficient of clutch according to claim 11 , wherein the operation of acquiring a correction weight corresponding to an engine torque according to the torque difference comprises:
determining a torque interval corresponding to the engine torque according to the engine torque; and
selecting a correction weight corresponding to the torque difference from at least one correction weight corresponding to the torque interval.

15. The computing processing device for correcting physical slip and wear coefficient of clutch according to claim 11 , wherein the operation of correcting a physical slip and wear coefficient according to the correction weight and a running-in state of the clutch comprises:
correcting the running-in state of the clutch according to the correction weight, and obtain a corrected running-in state; and
interpolating between a physical slip and wear coefficient of a new clutch and a physical slip and wear coefficient of a clutch after running-in according to the corrected running-in state, and obtain a corrected physical slip and wear coefficient.

16. The computing processing device for correcting physical slip and wear coefficient of clutch according to claim 11 , wherein the preset condition co

Assignees

• Great Wall Motor Co Ltd

Inventors

• Hu Zhitao
• Van De Ven Antonius Johannes Ma
• Liu Xiaodong
• Liu Wenjian

Classifications

• F16D2500/30404

  Clutch temperature · CPC title

• F16D2500/3165

  Using the moment of inertia of a component as input for the control · CPC title

• F16D2500/50257

  During a creep operation · CPC title

• F16D2500/30806

  Engaged transmission ratio · CPC title

• F16D48/06 Primary

  Control by electric or electronic means, e.g. of fluid pressure · CPC title