Clutch control device

Patent metadata

Field	Value
Publication number	US-11199230-B2
Application number	US-201916982505-A
Country	US
Kind code	B2
Filing date	Mar 14, 2019
Priority date	Mar 19, 2018
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

This clutch control device is provided with: a first valve; a second valve; a valve control unit configured to control the operation of each of the first valve and the second valve; an operation determination unit configured to perform an operation determination for the clutch device; and an initial operation completion determination unit which determines whether an initial operation of the clutch device has been completed. The valve control unit, if it is determined by the operation determination unit that an on-off switching process is required, subjects both the first valve and the second valve to opening-control. If it is determined by the initial operation completion determination unit that the initial operation has been completed, the valve control unit subjects the second valve to closing-control.

First claim

The invention claimed is:

1. A clutch control device configured to control switching between disengagement and engagement of a clutch device by adjusting an urging force of an elastic member to a clutch member in the clutch device, the urging force being adjusted by controlling movement of a piston of a clutch actuator, and the clutch actuator including a pressure chamber formed in a cylinder, and the piston provided movably in the cylinder in accordance with pressure of a working fluid in the pressure chamber, the clutch control device comprising:
a first valve provided to adjust the pressure of the working fluid in the pressure chamber;
a second valve provided to adjust the pressure of the working fluid in the pressure chamber; and
an electronic control unit configured to:
control operation of each of the first valve and the second valve;
perform an operation determination of the clutch device; and
determine whether an initial operation of the clutch device is completed when the control of each of the first valve and the second valve is started,

wherein the controlling of the operation of each of the first valve and the second valve by the electronic control unit includes:
performing opening control on both the first valve and the second valve when it is determined by the electronic control unit that a disengagement and engagement switching process of the clutch device is necessary; and
performing closing control on the second valve when it is determined by the electronic control unit that the initial operation of the clutch device is completed.

2. The clutch control device according to claim 1 ,
wherein the clutch control device comprises:
a first supply valve for controlling supply of the working fluid to the pressure chamber; and
a second supply valve for controlling the supply of the working fluid to the pressure chamber,

wherein the electronic control unit is configured to:
control operation of the first supply valve; and
control operation of the second supply valve, and

wherein, when it is determined by the electronic control unit that the disengagement and engagement switching process of the clutch device by supplying working fluid to the pressure chamber is necessary, both the first supply valve and the second supply valve are subjected to the opening control, and when it is determined by the electronic control unit that the initial operation of the clutch device is completed, the second supply valve is subjected to the closing control while the first supply valve is kept open.

3. The clutch control device according to claim 2 ,
wherein the first valve is a first discharge valve and the second valve is a second discharge valve;
wherein the clutch control device comprises:
the first discharge valve for controlling discharge of the working fluid in the pressure chamber; and
the second discharge valve for controlling the discharge of the working fluid in the pressure chamber,

wherein the electronic control unit is configured to:
control operation of the first discharge valve; and
control operation of the second discharge valve, and

wherein, when it is determined by the electronic control unit that the disengagement and engagement switching process of the clutch device by discharging the working fluid from the pressure chamber is necessary, both the first discharge valve and the second discharge valve are subjected to the opening control, and when it is determined by the electronic control unit that the initial operation of the clutch device is completed, the second discharge valve is subjected to the closing control while the first discharge valve is kept open.

4. The clutch control device according to claim 1 ,
wherein the clutch control device comprises:
a first discharge valve for controlling discharge of the working fluid in the pressure chamber; and
a second discharge valve for controlling the discharge of the working fluid in the pressure chamber,

wherein the electronic control unit is configured to:
control operation of the first discharge valve; and
control operation of the second discharge valve, and

wherein, when it is determined by the electronic control unit that the disengagement and engagement switching process of the clutch device by discharging the working fluid from the pressure chamber is necessary, both the first discharge valve and the second discharge valve are subjected to the opening control, and when it is determined by the electronic control unit that the initial operation of the clutch device is completed, the second discharge valve is subjected to the closing control while the first discharge valve is kept open.

5. A clutch control device configured to control switching between disengagement and engagement of a clutch device by adjusting an urging force of an elastic member to a clutch member in the clutch device, the urging force being adjusted by controlling movement of a piston of a clutch actuator, and the clutch actuator including a pressure chamber formed in a cylinder, and the piston provided movably in the cylinder in accordance with pressure of a working fluid in the pressure chamber, the clutch control device comprising:
a first valve provided to adjust the pressure of the working fluid in the pressure chamber;
a second valve provided to adjust the pressure of the working fluid in the pressure chamber;
a valve control unit configured to control operation of each of the first valve and the second valve;
an operation determination unit configured to perform an operation determination of the clutch device; and
an initial operation completion determination unit configured to determine whether an initial operation of the clutch device is completed when the control is started by the valve control unit,
wherein the valve control unit is configured to:
perform opening control on both the first valve and the second valve when it is determined by the operation determination unit that a disengagement and engagement switching process of the clutch device is necessary; and
perform closing control on the second valve when it is determined by the initial operation completion determination unit that the initial operation of the clutch device is completed.

Assignees

• Isuzu Motors Ltd

Inventors

• YAHAGI Shuuichi

Classifications

• F16D25/087 Primary

  the clutch being actuated by the fluid-actuated member via a diaphragm spring or an equivalent array of levers (F16D25/085, F16D25/086 take precedence) · CPC title

• F16D2048/0221

  Valves for clutch control systems; Details thereof · CPC title

• F16D2500/1107

  Vehicles · CPC title

• F16D2500/10412

  Transmission line of a vehicle · CPC title

• F16D2048/0281

  Complex circuits with more than two valves in series or special arrangements thereof not provided for in previous groups · CPC title