Clutch control device

Patent metadata

Field	Value
Publication number	US-12179735-B2
Application number	US-202218284301-A
Country	US
Kind code	B2
Filing date	Mar 10, 2022
Priority date	Mar 31, 2021
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

This clutch control device includes a clutch device configured to connect or disconnect power transmission between a prime mover and an output target, a clutch actuator configured to output a drive force for actuating the clutch device, and a control unit configured to control driving of the clutch actuator, in which the clutch actuator is provided with a drive source that outputs the drive force and a power transmission mechanism that is disposed between the drive source and the clutch device, and the control unit detects parameter values corresponding to friction of the clutch actuator on the basis of a delay in driving of the power transmission mechanism with respect to a change in a control parameter for the drive source, and controls driving of the drive source through use of a control parameter including at least a part of the parameter values corresponding to the friction.

First claim

What is claimed is:

1. A clutch control device comprising:
a clutch device configured to connect or disconnect power transmission between a prime mover and an output target;
a clutch actuator configured to output a drive force for actuating the clutch device; and
a control unit configured to control driving of the clutch actuator,
wherein the clutch actuator is provided with a drive source that outputs the drive force and a power transmission mechanism that is disposed between the drive source and the clutch device,
the control unit detects parameter values corresponding to friction of the clutch actuator on the basis of a delay in driving of the power transmission mechanism with respect to a change in a control parameter for the drive source, and controls driving of the drive source through use of a control parameter including at least a part of the parameter values corresponding to the friction,
the clutch device is a normally closed clutch that is in a disengagement state by an operation input including the drive force of the clutch actuator, and is in a connected state when there is no operation input, and
among operation states of the clutch device from the connected state to the disengagement state, and then back to the connected state again,
there is a first standby phase in which a current lower than a reference control parameter not including the friction portion by a first specified amount is applied in the connected state of the clutch device, and
a second standby phase in which the parameter values corresponding to the friction and the first specified amount are subtracted from a target current when a target load line of an electric motor does not have a load increase equal to or higher than a constant value in the disengagement state of the clutch device.

2. The clutch control device according to claim 1 ,
wherein the drive source is the electric motor that is driven by a current supply,
the power transmission mechanism includes drive detection sensors that detect driving of transmission elements, and
as a method of detecting the parameter values corresponding to the friction, the control unit performs current control for friction detection on the electric motor, and detects current values when the drive detection sensors have detected the driving of the transmission elements as the parameter values corresponding to the friction.

3. The clutch control device according to claim 2 ,
wherein, as a method of detecting the parameter value corresponding to the friction, the control unit supplies a current for friction detection to the electric motor when the clutch device is in the connected state, and detects the current value when the drive detection sensors have detected the driving of the transmission elements as the parameter value corresponding to the friction.

4. The clutch control device according to claim 1 ,
wherein the control unit increases or decreases the control parameter according to the parameter values corresponding to the friction when the operating state of the clutch device is switched by driving of the clutch actuator,
sets an intermediate value obtained by subtracting a predetermined specified value from a target value corresponding to a next operating state of the clutch device at a beginning of the increase or decrease, changes the control parameter at a first time up to the intermediate value, and changes the control parameter at a second time longer than the first time after the intermediate value.

Assignees

• Honda Motor Co Ltd

Inventors

• Ono Junya
• Ryuzaki Tatsuya

Classifications

• B60W2300/36

  Cycles; Motorcycles; Scooters · CPC title

• F16D48/06

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

• B60W10/02 Primary

  including control of driveline clutches · CPC title

• H02P29/0027 Primary

  Controlling a clutch between the prime mover and the load · CPC title