Method and apparatus for controlling dual clutch transmission

Patent metadata

Field	Value
Publication number	US-10030721-B2
Application number	US-201514947731-A
Country	US
Kind code	B2
Filing date	Nov 20, 2015
Priority date	Nov 24, 2014
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

A method for controlling a dual clutch transmission (DCT) may include: determining, by a state determination unit, whether a clutch of the DCT is stuck; disabling, by a control unit, the clutch when it is determined that the clutch is stuck; controlling, by the control unit, the driving unit to control the disabled clutch through a reference operation; determining, by the state determination unit, whether the disabled clutch is normally operated, when a vehicle is stopped; and enabling, by the control unit, the clutch when it is determined that the disabled clutch is normally operated.

First claim

What is claimed is:

1. A method for controlling a dual clutch transmission (DCT), comprising:
determining, by a state determination unit, whether a clutch of the DCT is stuck;
disabling, by a control unit, the clutch when it is determined that the clutch is stuck;
controlling, by the control unit, a driving unit to control the disabled clutch through a reference operation;
determining, by the state determination unit, whether the disabled clutch is normally operated, when a vehicle is stopped; and
enabling, by the control unit, the clutch when it is determined that the disabled clutch is normally operated.

2. The method of claim 1 , wherein the determining of whether the clutch is stuck comprises:
changing, by the state determination unit, a target position of the clutch;
determining whether a position of the clutch is fixed; and
determining whether a current of the driving unit for driving the clutch exceeds a preset reference current, and
the state determination unit determines that the clutch is stuck, when the current of the driving unit exceeds the reference current in a state where the position of the clutch is fixed.

3. The method of claim 2 , wherein the determining of whether the clutch is stuck further comprises determining whether the time during which the current of the driving unit exceeds the reference current passes a reference time, and
when the time during which the current of the driving unit exceeds the reference current passes the reference time, the state determination unit determines that the clutch is stuck.

4. The method of claim 1 , further comprising disengaging an engaged gear corresponding to the disabled clutch, after the disabling of the clutch.

5. The method of claim 1 , wherein the determining of whether the disabled clutch is normally operated comprises:
changing, by the state determination unit, a target position of the disabled clutch; and
determining whether a RPM of an input shaft of the disabled clutch coincides with an engine RPM, and
when the RPM of the input shaft of the disabled clutch coincides with the engine RPM, the state determination unit determines that the disabled clutch is normally operated.

6. The method of claim 1 , further comprising determining, by the control unit, whether the disabled clutch is released, after the disabling of the clutch,
wherein when the disabled clutch is released, the control unit controls the disabled clutch through the reference operation.

7. The method of claim 1 , wherein during the controlling of the driving unit to control the disabled clutch through the reference operation,
the control unit controls the driving unit to reciprocate the disabled clutch.

8. The method of claim 7 , wherein during the controlling of the driving unit to control the disabled clutch through the reference operation,
the control unit controls the driving unit to repetitively advance and retreat the disabled clutch along a moving direction of the clutch.

9. An apparatus for controlling a dual clutch transmission (DCT), comprising:
a state determination unit configured to determine whether a clutch of the DCT is stuck or normally operated;
a control unit configured to disable the clutch and control the disabled clutch through a reference operation, when it is determined that the clutch is stuck; and
a driving unit configured to control the disabled clutch through the reference operation according to the control of the control unit,
wherein the control unit controls the driving unit to repetitively advance and retreat the disabled clutch along a moving direction of the clutch, when the control unit controls the disabled clutch through the reference operation.

10. The apparatus of claim 9 , wherein the state determination unit comprises:
an abnormal state determination unit configured to determine whether the clutch is stuck; and
a normal state determination unit configured to determine whether the clutch is normally operated.

11. The apparatus of claim 10 , wherein the abnormal state determination unit changes a target position of the clutch and determines that the clutch is stuck, when a current of the driving unit exceeds a preset reference current in a state where the position of the clutch is fixed.

12. The apparatus of claim 10 , wherein the normal state determination unit changes a target position of the disabled clutch when a vehicle is stopped, and determines that the disabled clutch is normally operated, when a RPM of an input shaft of the disabled clutch coincides with an engine RPM.

Assignees

• Hyundai Autron Co Ltd

Inventors

• Choi Seung Man

Classifications

• F16D48/06 Primary

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

• F16D2500/1085

  Automatic transmission · CPC title

• G07C5/02

  Registering or indicating driving, working, idle, or waiting time only (apparatus forming part of taximeters G07B13/00) · CPC title

• F16D2500/50239

  Soft clutch engagement · CPC title

• F16D2500/30421

  Torque of the output shaft · CPC title