Clutch control device

Patent metadata

Field	Value
Publication number	US-11242900-B2
Application number	US-202117162699-A
Country	US
Kind code	B2
Filing date	Jan 29, 2021
Priority date	Aug 8, 2018
Publication date	Feb 8, 2022
Grant date	Feb 8, 2022

Abstract

A first engagement member includes a first meshing portion and rotates integrally with a first shaft. A second engagement member includes a second meshing portion configured to mesh with the first meshing portion and rotates integrally with a second shaft. An electric clutch device drives the first engagement member via a pressing member that extends and contracts in response to drive of a clutch actuator. When the electric clutch device is to be engaged, the first shaft command computation unit sets the first shaft rotation speed command value to be smaller than the rotation speed of the second shaft. Further, after the rotation speed of the first shaft matches the first shaft rotation speed command value, the first shaft command computation unit sets the first shaft rotation speed command value to be gradually closer to the rotation speed of the second shaft.

First claim

What is claimed is:

1. A clutch control device for an electric clutch device, the electric clutch device including: a first engagement member that includes a first meshing portion and configured to rotate integrally with a first shaft; a second engagement member that includes a second meshing portion configured to mesh with the first meshing portion and that is configured to rotate integrally with a second shaft; and a clutch actuator, the electric clutch device configured to drive the first engagement member via a pressing member that is configured to extend and contract in response to drive of the clutch actuator, the clutch control device configured to control an engagement state of the electric clutch device, the clutch control device comprising:
a first shaft command computation unit configured to compute a first shaft rotation speed command value related to a rotation speed of the first shaft; and
a drive control unit configured to control the drive of the clutch actuator, wherein
the first shaft command computation unit is configured to, when the electric clutch device is to be engaged,
set the first shaft rotation speed command value to a value that is smaller than a rotation speed of the second shaft and
cause the first shaft rotation speed command value to gradually become closer to the rotation speed of the second shaft, after the rotation speed of the first shaft matches the first shaft rotation speed command value.

2. The clutch control device according to claim 1 , wherein
the drive control unit is configured to, when the electric clutch device is to be engaged, control the clutch actuator to cause the pressing force between the first engagement member and the second engagement member to periodically increase and decrease, after the rotation speed of the first shaft matches the command value of the first shaft rotation speed.

3. The clutch control device according to claim 2 , further comprising:
an abnormality determination unit configured to determine that an abnormality has occurred in the electric clutch device in a case where the first meshing portion and the second meshing portion do not mesh with each other, even when a number of times of repeating increase and decrease in the pressing force becomes larger than an abnormality determination count.

4. The clutch control device according to claim 1 , wherein
the drive control unit is configured to, when the clutch engagement command for engaging the electric clutch device is turned on,
drive the first engagement member to a before-engagement position, which is before a contact position at which the first engagement member and the second engagement member come into contact with each other and
maintain the first engagement member at the before-engagement position until the rotation speed of the first shaft matches the first shaft rotation speed command value.

5. A clutch control device comprising:
a processor configured to
compute a first shaft rotation speed command value related to a rotation speed of a first shaft that is configured to rotate integrally with a first meshing portion
drive a clutch actuator to cause a pressing member to extend and contract to drive the first meshing portion
when the first meshing portion is to be engaged with a second meshing portion that is configured to rotate integrally with a second shaft, set the first shaft rotation speed command value to a value that is smaller than a rotation speed of the second shaft and
after the rotation speed of the first shaft matches the first shaft rotation speed command value, cause the first shaft rotation speed command value to gradually become closer to the rotation speed of the second shaft.

Assignees

• Denso Corp

Inventors

• Kamio Shigeru

Classifications

• B60W2710/025

  Clutch slip, i.e. difference between input and output speeds · CPC title

• F16D2500/30415

  Speed of the input shaft · CPC title

• B60K2006/4825

  Electric machine connected or connectable to gearbox input shaft · CPC title

• F16D2500/10412

  Transmission line of a vehicle · CPC title

• B60K6/387

  Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means · CPC title