Clutch control device

Patent metadata

Field	Value
Publication number	US-11378144-B2
Application number	US-201917260626-A
Country	US
Kind code	B2
Filing date	Jun 6, 2019
Priority date	Jul 19, 2018
Publication date	Jul 5, 2022
Grant date	Jul 5, 2022

Abstract

This clutch control device includes an engine (13), a transmission (21), a clutch device (26) configured to connect and disconnect motive power transmission between the engine (13) and the transmission (21), a clutch actuator (50) configured to drive the clutch device (26) and change a clutch capacity, and a control unit (60) configured to calculate a target value (Pt) of a control parameter (Ps) for the clutch capacity. When the target value (Pt) of the control parameter (Ps) immediately after system startup is defined as a first control target value (P1) and the target value (Pt) of the control parameter (Ps) during a clutch stroke at the time of the system startup is defined as a second control target value (P2), the control unit (60) is configured to set the first control target value (P1) to a value greater than the second control target value (P2).

First claim

What is claim is:

1. A clutch control device comprising:
an engine;
a transmission;
a clutch device configured to connect and disconnect motive power transmission between the engine and the transmission;
a clutch actuator configured to drive the clutch device and change a clutch capacity; and
a control unit configured to calculate a target value of a hydraulic pressure for the clutch capacity,
wherein, when the target value of the hydraulic pressure immediately after initiation of system startup is set as a first control target value and, during the system startup, based on a clutch stroke being initiated, the target value of the hydraulic pressure is set as a second control target value, the control unit is configured to set the first control target value to a value greater than the second control target value.

2. The clutch control device according to claim 1 , further comprising a control parameter sensor configured to detect an actually measured value of the hydraulic pressure,
wherein, when the hydraulic pressure detected by the control parameter sensor has reached the first control target value at the time of the system startup, the control unit is configured to switch the target value of the hydraulic pressure from the first control target value to the second control target value.

3. The clutch control device according to claim 2 , wherein, after the target value of the hydraulic pressure is switched to the second control target value, the control unit is configured to switch the target value of the hydraulic pressure to a third control target value smaller than the second control target value when a stroke of the clutch device has been stopped.

4. The clutch control device according to claim 3 , wherein the control unit is configured to switch the target value of the hydraulic pressure to the third control target value after the second control target value is continued for a predetermined specified time period.

5. The clutch control device according to claim 4 , wherein, when the target value of the hydraulic pressure is switched from the second control target value to the third control target value, the control unit is configured to set a change speed of the target value of the hydraulic pressure to a speed lower than or equal to a predetermined target speed.

6. The clutch control device according to claim 3 , wherein, when the target value of the hydraulic pressure is switched from the second control target value to the third control target value, the control unit is configured to set a change speed of the target value of the hydraulic pressure to a speed lower than or equal to a predetermined target speed.

7. The clutch control device according to claim 1 , wherein, after the target value of the hydraulic pressure is switched to the second control target value, the control unit is configured to switch the target value of the hydraulic pressure to a third control target value smaller than the second control target value when a stroke of the clutch device has been stopped.

8. The clutch control device according to claim 7 , wherein the control unit is configured to switch the target value of the hydraulic pressure to the third control target value after the second control target value is continued for a predetermined specified time period.

9. The clutch control device according to claim 8 , wherein, when the target value of the hydraulic pressure is switched from the second control target value to the third control target value, the control unit is configured to set a change speed of the target value of the hydraulic pressure to a speed lower than or equal to a predetermined target speed.

10. The clutch control device according to claim 7 , wherein, when the target value of the hydraulic pressure is switched from the second control target value to the third control target value, the control unit is configured to set a change speed of the target value of the hydraulic pressure to a speed lower than or equal to a predetermined target speed.

Assignees

• Honda Motor Co Ltd

Inventors

• Matsuura Kohei
• Ono Junya
• Ryuzaki Tatsuya

Classifications

• F16D2500/1045

  Friction clutch · CPC title

• F16D2500/7041

  Position · CPC title

• F16D2500/304

  from the clutch · CPC title

• F16D2500/7044

  Output shaft torque · CPC title

• F16D2500/3166

  Detection of an elapsed period of time · CPC title