JP2018179055A - Clutch control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the preferable responsibility while preventing the occurrence of over chute.SOLUTION: A clutch control device comprises: first valves 41 and 43 and second valves 42 and 44 for supplying working fluid to a pressure chamber 23 or discharging the working fluid from the pressure chamber 23; a valve control part 55 for controlling the first valves 41 and 43 and/or the second valves 42 and 44; and a necessary working fluid amount calculation part 53 for calculating the working fluid amount necessary for a pressure chamber 23 based on the target working fluid amount in the pressure chamber 23 and the present working fluid amount in the pressure chamber 23. With the valve control part 55, when the working fluid amount necessary for the pressure chamber 23 is larger than the prescribed threshold value, it supplies the working fluid to the pressure chamber 23 or discharges the working fluid from the pressure chamber 23 by controlling the first valves 41 and 43 and second valves 42 and 44.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a clutch control device, and more particularly to a clutch control device for connecting and disconnecting a clutch device by controlling a clutch actuator having a piston and a cylinder.

  Conventionally, a clutch control device is known which controls transmission of driving force between the engine and the transmission mechanism by arranging a clutch device between the engine and the transmission mechanism and controlling connection and disconnection of the clutch device. . There is also known a clutch control device that controls connection and disconnection of a clutch device using a fluid (working fluid) such as air or hydraulic oil.

  As a clutch control device of this type, for example, when the clutch control device of Patent Document 1 controls the clutch by supplying air to the clutch actuator, it first performs operation control of the small opening electromagnetic valve for air supply, The control of the small opening solenoid valve for air supply is stopped and the large opening solenoid valve for air supply is operated and controlled, and then the control of the large opening solenoid valve for air supply is stopped and the small opening solenoid valve for air supply Is controlled again, and when the clutch stroke of the clutch actuator reaches the target clutch stroke value, the operation control of the small opening degree electromagnetic valve for air supply is stopped (see, for example, Patent Document 1).

JP, 2014-111957, A

  By the way, there are clutch devices having non-linear clutch spring characteristics in a clutch device in which connection and disconnection of a clutch is performed by driving a clutch actuator by a working fluid. That is, the amount of movement of the piston relative to the amount of working fluid in the pressure chamber of the clutch actuator may not be linear. In such a clutch device, in order to ensure the responsiveness of the clutch actuator, an overshoot may occur.

  An object of the technology of the present disclosure is to provide a clutch control device that can ensure good responsiveness while preventing occurrence of an overshoot.

  The technique of the present disclosure is a clutch control device for connecting and disconnecting a clutch device by controlling a clutch actuator having a piston and a cylinder, which is disposed between the clutch actuator and an air supply and discharge source. A first valve and a second valve for supplying the working fluid into the pressure chamber or discharging the working fluid from the pressure chamber, a valve control unit for controlling the first valve and / or the second valve, and the inside of the pressure chamber And a required working fluid amount calculating unit for calculating a necessary working fluid amount required in the pressure chamber based on a target working fluid amount and a current working fluid amount in the pressure chamber, and the valve control unit When the required working fluid amount in the pressure chamber calculated by the required working fluid amount calculating unit is larger than a predetermined threshold value, the first valve And characterized by discharging the working fluid from the second to control the valve to supply hydraulic fluid to the pressure chamber or the pressure chamber.

  Further, the second valve supplies a working fluid at a flow rate smaller than that of the first valve into the pressure chamber or discharges it from the pressure chamber.

  Furthermore, the valve control unit controls the second valve to supply the working fluid into the pressure chamber or supply the working fluid from the pressure chamber when the required working fluid amount in the pressure chamber is equal to or less than the threshold. Discharge.

  Furthermore, while the valve control unit changes the required working fluid amount in the pressure chamber from a first range equal to or less than the threshold to a second range larger than the threshold or changes from the second range to the first range Within the predetermined required working fluid volume range, the first valve is controlled to supply the working fluid to the pressure chamber or to discharge the working fluid from the pressure chamber.

  Furthermore, the second valve has a smaller valve diameter than the first valve.

  Furthermore, the first valve is disposed between the clutch actuator and the air supply source, and a first air supply valve for supplying the working fluid into the pressure chamber, and between the clutch actuator and the exhaust source. And a first exhaust valve arranged to discharge the working fluid from the pressure chamber, wherein the second valve is disposed in parallel with the first air supply valve, and the second air valve is provided in proportion to the first air supply valve. And a second air supply valve for supplying a small flow rate of working fluid into the pressure chamber, and a first air supply valve arranged in parallel with the first exhaust valve, wherein the working fluid has a small flow rate as compared to the first And a second exhaust valve for discharging the pressure from the pressure chamber, wherein the valve control unit controls the first air supply valve and the second air supply valve when the required amount of working fluid in the pressure chamber is larger than the threshold. Control Serial supplying the working fluid to the pressure chamber or to control the first exhaust valve and the second exhaust valve for discharging the working fluid from the pressure chamber.

  Furthermore, when connecting and disconnecting the clutch device, feedback control is performed based on a target value setting unit that sets a target position of the piston, a target position of the piston, and a current position of the piston. The system further includes a feedback control unit, and the valve control unit controls the first valve and / or the second valve based on the feedback control to supply working fluid into the pressure chamber or from the pressure chamber Drain the working fluid.

  Furthermore, the threshold value differs between when the clutch device is disengaged and when the clutch device is in contact.

  According to the technology of the present disclosure, it is possible to ensure good responsiveness while preventing occurrence of an overshoot.

It is a typical block diagram of the clutch system concerning this embodiment. FIG. 2A is a view showing the relationship between the stroke and the release load in the clutch actuator according to the present embodiment. FIG. 2 (B) is a view showing the relationship between the stroke and the air amount in the pressure chamber in the clutch actuator according to the present embodiment. It is a functional block diagram of ECU concerning this embodiment. It is a flowchart of the clutch disconnection process or contact process which concerns on this embodiment. It is a flowchart of the clutch disconnection process or contact process which concerns on other embodiment.

  Hereinafter, a clutch control device according to an embodiment of the present invention will be described based on the attached drawings.

  FIG. 1 is a schematic configuration view of a clutch system according to the present embodiment. The clutch system 1 includes a clutch device 10, a clutch actuator 20, a clutch control device 2, and a stroke sensor 18.

  The clutch device 10 includes a flywheel 12, a clutch disk 13, a pressure plate 14, a clutch cover 15, a diaphragm spring 16, and a release bearing 17.

  The flywheel 12 is integrally rotatably connected to a crankshaft 11 to which driving force of an engine (not shown) is transmitted. A clutch cover 15 is fixed to the side of the outer peripheral edge of the flywheel 12 opposite to the crankshaft 11.

  The clutch disc 13 is disposed coaxially with the crankshaft 11, and has an attachment portion 13A axially fitted to an input shaft 31 of a transmission (not shown) so as to be axially movable and integrally rotatable, and an outer periphery of the attachment portion 13A. And a friction plate 13C fixed to both sides of the outer edge of the disk body 13B.

  The pressure plate 14 is disposed on the opposite side of the clutch disc 13 to the flywheel 12 so as to be in contact with the friction plate 13C. The outer edge portion of the diaphragm spring 16 is disposed on the surface of the pressure plate 14 opposite to the flywheel 12 so as to be in contact therewith, and when pressed by the diaphragm spring 16, the clutch disc 13 can be pressed against the flywheel 12 It has become. When the pressure plate 14 is not pressed by the diaphragm spring 16, the pressure plate 14 is moved to the opposite side of the flywheel 12 by a spring (not shown) so that the clutch disc 13 is not pressed against the flywheel 12. .

  The diaphragm spring 16 is a substantially conical spring member in an unloaded state, and a middle portion between the inner edge portion and the outer edge portion is attached to the clutch cover 15. The outer edge of the diaphragm spring 16 is disposed to contact the pressure plate 14 on the opposite side of the flywheel 12, and the inner edge of the diaphragm spring 16 is disposed to contact the flywheel 12 side of the release bearing 17. It is done.

  In the present embodiment, when the release bearing 17 does not press the inner edge portion of the diaphragm spring 16 toward the flywheel 12, the outer edge portion of the diaphragm spring 16 presses the pressure plate 14 toward the flywheel 12, and the clutch disc The clutch device 10 is brought into contact with the flywheel 12 so that the clutch 13 is brought into pressure contact with the flywheel 12. On the other hand, when the release bearing 17 presses the inner edge portion of the diaphragm spring 16 to the flywheel 12 side, the outer edge portion of the diaphragm spring 16 moves to the opposite side to the flywheel 12, and the outer edge portion of the diaphragm spring 16 The pressure plate 14 is not pressed, and the clutch disk 13 is not pressed against the flywheel 12, that is, the clutch device 10 is in the disconnected state.

  The release bearing 17 is configured such that the flywheel 12 side of the inner ring is in contact with the inner edge portion of the diaphragm spring 16, and the opposite side of the outer ring to the flywheel 12 is connected to a piston 22 described later of the clutch actuator 20. The spring 16 and the piston 22 can be relatively rotated, and can be moved in the axial direction of the input shaft 31 in accordance with the axial movement of the piston 22.

  The clutch actuator 20 includes a cylinder 21 disposed relatively rotatably around the input shaft 31, and a piston 22 axially movable in the cylinder 21. The pressure chamber 23 is formed by the surface of the piston 22 opposite to the flywheel 12 and the inner wall of the cylinder 21, and the open chamber 24 is formed by the outer peripheral surface of the piston 22, the surface of the flywheel 12 and the inner wall of the cylinder 21. It is formed.

  The cylinder 21 is provided with an air supply pipe 25 for supplying air (an example of a working fluid) into the pressure chamber 23, and an exhaust pipe 26 for discharging air from the pressure chamber 23. . Further, the cylinder 21 is formed with an open hole 21A which allows the open chamber 24 to communicate with the outside (for example, the outside having the atmospheric pressure).

  According to the clutch actuator 20, by supplying air into the pressure chamber 23, the piston 22 can be moved to the flywheel 12 side, the clutch device 10 can be disconnected, and the air is discharged from the pressure chamber 23. By doing this, the piston 22 can be moved to the opposite side to the flywheel 12, and the clutch device 10 can be brought into the engagement state.

  The clutch control device 2 includes a first air supply valve 41 and a second air supply valve 42 disposed in parallel between the air supply side supplying air and the air supply pipe 25, and an exhaust air for discharging the air. The first exhaust valve 43 and the second exhaust valve 44, the first air supply valve 41, the second air supply valve 42, and the first exhaust valve arranged in parallel between the side and the exhaust pipe 26 An electronic control unit (ECU) 50 that controls the valve 43 and the second exhaust valve 44 is provided.

  The first air supply valve 41 and the second air supply valve 42 make the air supply side communicate with the pressure chamber 23 to shut off the air supply state (supply state), the air supply side, and the pressure chamber 23. Thus, it is possible to switch between the state in which the supply of air is stopped (supply stop state). The first air supply valve 41 and the second air supply valve 42 switch the supply state and the supply stop state by control of changing the duty ratio in the ECU 50, and adjust the air supply amount in the pressure chamber 23. can do. Here, the diameter of the second air supply valve 42 is smaller than that of the first air supply valve 41, and the amount of air that can be supplied in the supply state is small.

  The first exhaust valve 43 and the second exhaust valve 44 communicate the exhaust side with the pressure chamber 23 to discharge the air (discharge state), and block the exhaust side and the pressure chamber 23 to discharge the air. Can be switched to the state of stopping the discharge (discharge stop state). Then, the first exhaust valve 43 and the second exhaust valve 44 can switch the discharge state and the discharge stop state by the control of changing the duty ratio in the ECU 50, and can adjust the air discharge amount. Here, the diameter of the second exhaust valve 44 is smaller than that of the first exhaust valve 43, and the amount of air that can be discharged in the discharged state is reduced.

  The stroke sensor 18 detects the position (stroke) of the piston 22 of the clutch actuator 20 from a predetermined reference position. The stroke sensor 18 notifies the ECU 50 of the detected stroke of the piston 22.

  Next, the characteristics of the clutch actuator 20 when operating the clutch device 10 will be described in detail.

  FIG. 2A is a view showing the relationship between the stroke and the release load in the clutch actuator according to the present embodiment. In FIG. 2A, the vertical axis indicates the load (release load) applied to the piston 22, and the horizontal axis indicates the stroke of the piston 22. The position where the stroke is 0 in FIG. 2A is, for example, when the pressure in both the pressure chamber 23 and the open chamber 24 is atmospheric pressure.

  As shown in FIG. 2A, when the stroke of the piston 22 is small, the change in the stroke with respect to the change in the load is smaller than in the case where the stroke is large. That is, the stroke of the piston 22 is nonlinear with respect to the load.

  FIG. 2 (B) is a view showing the relationship between the stroke of the piston and the amount of air in the pressure chamber in the clutch actuator according to the present embodiment. In FIG. 2B, the vertical axis represents the amount of air in the pressure chamber 23, and the horizontal axis represents the stroke of the piston 22. The position where the stroke is 0 in FIG. 2B indicates the position when the piston 22 is at a predetermined initial position (set position). The left side of the horizontal axis is the side where the clutch is in contact, and is the direction in which the piston 22 moves when the pressure is exhausted from the pressure chamber 23 by the first exhaust valve 43 and / or the second exhaust valve 44. On the other hand, the right side of the horizontal axis is the side where the clutch is disengaged, and in the direction in which the piston 22 moves when air is supplied to the pressure chamber 23 by the first air supply valve 41 and / or the second air supply valve 42 is there.

  As shown in FIG. 2B, when the amount of air in the pressure chamber 23 is small, as compared with the case where the amount of air in the pressure chamber 23 is large, the stroke for the change in the amount of air in the pressure chamber 23 The change is getting smaller. That is, the stroke of the piston 22 is nonlinear with respect to the amount of air in the pressure chamber 23.

  Next, the ECU 50 will be described in detail.

  FIG. 3 is a functional configuration diagram of the ECU 50 according to the present embodiment. The ECU 50 controls the clutch actuator 20 to connect or disconnect the clutch device 10, and includes a known CPU, a ROM, a RAM, an input port, an output port, and the like.

  The ECU 50 includes a clutch operation determination unit 51, a target value setting unit 52, a required air amount calculation unit (necessary working fluid amount calculation unit) 53, a PID (Proportional-Integral-Differential) control unit 54, and a valve control unit 55. And have. Although each of these functional elements is described as being included in the ECU 50 which is an integral hardware, any one of these may be provided in a separate hardware, and the CPU, the ROM, and the ROM included in the ECU 50 The present invention can also be realized by software mainly composed of a program read out from and executed by the CPU.

  The clutch operation determination unit 51 determines whether or not to start the clutch disconnection operation based on, for example, a vehicle speed from a vehicle speed sensor (not shown), an accelerator opening degree from an accelerator opening degree sensor, and the like. Then, when starting the clutch disconnection operation, the clutch operation determination unit 51 notifies the target value setting unit 52 and the required air amount calculation unit 53 to that effect. Further, the clutch operation determination unit 51 determines whether or not to start the clutch connection operation based on, for example, whether or not the shift of the transmission is completed. Then, when starting the clutch engagement operation, the clutch operation determination unit 51 notifies the target value setting unit 52 and the required air amount calculation unit 53 of that effect.

  Further, the clutch operation determination unit 51 determines whether the clutch disconnection operation has been completed based on, for example, the vehicle speed from a vehicle speed sensor (not shown), the accelerator opening degree from the accelerator opening degree sensor, and the like. Then, when the clutch disconnection operation is completed, the clutch operation determination unit 51 notifies the valve control unit 55 to that effect, and when the clutch disconnection operation is not completed, the required air amount calculation unit Notify 53 Further, the clutch operation determination unit 51 determines whether or not the clutch engagement operation has been completed, based on, for example, whether or not the shift of the transmission has been completed. When the clutch engagement operation is completed, the clutch operation determination unit 51 notifies the valve control unit 55 to that effect, and when the clutch engagement operation is not completed, the required air amount calculation unit Notify 53

  The target value setting unit 52 sets the target value of the stroke (position) of the piston 22 when notified that the clutch operation determination unit 51 performs the clutch disconnection operation or the clutch engagement operation, and sets the target value of the stroke to the PID. It is output to the control unit 54. Further, the target value setting unit 52 sets a target value of the amount of air in the pressure chamber 23 when notified by the clutch operation determination unit 51 that the clutch disengagement operation or the clutch engagement operation is performed, and the target of the air amount is set. The value is output to the required air amount calculation unit 53.

  The required air amount calculation unit 53 is notified by the clutch operation determination unit 51 that the clutch disconnection operation or the clutch connection operation is started, or that the stroke sensor 18 is notified that the clutch disconnection operation or the clutch connection operation is not completed. From the detected stroke of the piston 22, for example, the amount of air in the current pressure chamber 23 is calculated by a predetermined calculation formula. Then, the necessary air amount calculation unit 53 calculates the pressure chamber which is the difference between the target value of the air amount in the pressure chamber 23 input from the target value setting unit 52 and the calculated air amount in the current pressure chamber 23. The required amount of air required in 23 is calculated, and the value of the required amount of air is output to the valve control unit 55.

  The PID control unit 54 calculates the difference between the target value of the stroke of the piston 22 input from the target value setting unit 52 and the current stroke of the piston 22 detected by the stroke sensor 18, and based on the difference, the PID Control is executed to determine a feedback value regarding the stroke amount to be adjusted of the piston 22, and the feedback value is output to the valve control unit 55.

  The valve control unit 55 determines the stroke amount to be adjusted of the piston 22 based on the feedback value input from the PID control unit 54. Further, based on the stroke amount to be adjusted of the piston 22, the valve control unit 55 generates a control signal for controlling the first air supply valve 41 to the second exhaust valve 44 with a duty ratio. Then, the valve control unit 55 outputs the control signal to the first air supply valve 41 to the second exhaust valve 44 to control the first air supply valve 41 to the second exhaust valve 44. The air amount in the pressure chamber 23 of the clutch actuator 20 is adjusted to adjust the stroke of the piston 22, and then the clutch operation determination unit 51 is notified of that.

  Furthermore, when the valve control unit 55 is notified by the clutch operation determination unit 51 that the clutch disconnection operation or the clutch connection operation has been completed, the valve control unit 55 stops supplying the first air supply valve 41 and the second air supply valve 42. And generates a stop signal to put the first exhaust valve 43 and the second exhaust valve 44 in the discharge stop state, and outputs the stop signal to the first air supply valve 41 to the second exhaust valve 44. The adjustment of the amount of air in the pressure chamber 23 in the clutch actuator 20 is stopped by stopping the first air supply valve 41 to the second exhaust valve 44, the movement of the stroke of the piston 22 is stopped, and That is notified to the clutch operation determination unit 51.

  At this time, the valve control unit 55 determines whether the value of the required air amount in the pressure chamber 23 input from the required air amount calculation unit 53 is larger than a predetermined threshold value, that is, the value of the required air amount is predetermined. It is determined whether it is in the first range equal to or less than the threshold value or in the second range greater than the predetermined threshold value. Then, when the required air amount in the pressure chamber 23 is equal to or less than the predetermined threshold value, that is, when the required air amount is in the first range, the valve control unit 55 performs the second air supply valve 42 or the second By controlling the exhaust valve 44, the amount of air in the pressure chamber 23 of the clutch actuator 20 is adjusted to adjust the stroke of the piston 22.

  On the other hand, when the required air amount in the pressure chamber 23 is larger than the predetermined threshold value, that is, when the required air amount is in the second range, the valve control unit 55 performs the first air supply valve 41 and the first air supply valve 41. 2 Adjust the stroke of the piston 22 by adjusting the amount of air in the pressure chamber 23 of the clutch actuator 20 by controlling the air supply valve 42 or the first exhaust valve 43 and the second exhaust valve 44 .

  In addition, the valve control unit 55 changes the first required amount of air in the pressure chamber 23 from the first range to the second range, or the second required range from the second range to the first range. By controlling the air supply valve 41 or the first exhaust valve 43, the amount of air in the pressure chamber 23 of the clutch actuator 20 is adjusted, and the stroke of the piston 22 is adjusted.

  Next, the processing operation in the clutch system 1 according to the present embodiment will be described.

  FIG. 4 is a flowchart of the clutch disconnection process or the clutch engagement process according to the present embodiment. The clutch disconnection process or the clutch connection process is started, for example, when the power of the vehicle is turned on (the key switch of the ignition switch is turned on).

  First, the clutch operation determination unit 51 determines whether to start the clutch disengagement or the clutch engagement (step S11). Then, when the clutch disengagement or the clutch engagement is not started (step S11: NO), the clutch operation determination unit 51 returns to step S11, and waits for the start of the clutch disengagement or the clutch engagement. Then, when the clutch disengagement or the clutch engagement is started (step S11: YES), the required air amount calculation unit 53 calculates the required air amount in the pressure chamber 23 (step S12). The target value setting unit 52 sets a target value of the stroke of the piston 22 and a target value of the amount of air in the pressure chamber 23.

  Subsequently, the PID control unit 54 calculates the difference between the target value of the stroke of the piston 22 and the current stroke of the piston 22, executes PID control based on the difference, and adjusts the stroke to be adjusted of the piston 22. A feedback value for the quantity is determined (step S13).

  Subsequently, the valve control unit 55 determines the stroke amount to be adjusted of the piston 22 based on the feedback value, and thereafter, the value of the required air amount in the pressure chamber 23 is the upper limit value within the predetermined required air amount range. It is determined whether it is larger (step S14). Then, when the value of the required air amount in the pressure chamber 23 is larger than the upper limit value within the predetermined required air amount range (step S14: YES), the valve control unit 55 sets the first air supply valve 41 and the first 2) The air supply valve 42 or the first exhaust valve 43 and the second exhaust valve 44 are controlled (step S15), and the required air amount in the pressure chamber 23 is less than the upper limit value within the predetermined required air amount range In the case (step S14: NO), it is determined whether the value of the required air amount in the pressure chamber 23 is larger than the lower limit value in the predetermined required air amount range (step S16).

  Then, if the value of the required air amount in the pressure chamber 23 is larger than the lower limit value within the predetermined required air amount range (step S16: YES), the valve control unit 55 sets the first air supply valve 41 or the first 1) If the value of the required air amount in the pressure chamber 23 is less than or equal to the lower limit value within the predetermined required air amount range by controlling the exhaust valve 43 (step S17) (step S16: NO), the second air supply The second valve 42 or the second exhaust valve 44 is controlled (step S18).

  Subsequently, the clutch operation determination unit 51 determines whether or not the clutch disengagement or the clutch engagement is completed (step S19). Then, the required air amount calculation unit 53 calculates the required air amount in the pressure chamber 23 again (step S12) when the clutch disconnection or the clutch engagement is not completed (step S19: NO). On the other hand, when the clutch disconnection or the clutch engagement is completed (step S19: YES), the valve control unit 55 stops the control of the first air supply valve 41 to the second exhaust valve 44 (step S20), Thereafter, the clutch operation determination unit 51 determines again whether or not to start the clutch disengagement or the clutch engagement (step S11).

  As described above in detail, according to the clutch control device 2 according to the present embodiment, when the required air amount in the pressure chamber 23 is larger than the predetermined threshold value, the first air supply valve 41 and the second supply valve The air valve 42 or the first exhaust valve 43 and the second exhaust valve 44 are controlled to supply air into the pressure chamber 23 or exhaust air from the pressure chamber 23. When the amount of air in the pressure chamber 23 is equal to or less than a predetermined threshold value, the second air supply valve 42 or the second exhaust valve 44 is controlled to supply air into the pressure chamber 23 or the pressure chamber 23. Exhaust the air from inside. Thereby, when the required air amount in the pressure chamber 23 is larger than a predetermined threshold value, the amount of air supplied into the pressure chamber 23 or discharged from the pressure chamber 23 increases, and the stroke of the piston 22 is increased. Therefore, the responsiveness of the clutch device 10 can be improved, and if the amount of air in the pressure chamber 23 is equal to or less than a predetermined threshold value, the pressure is supplied into the pressure chamber 23 or discharged from the pressure chamber 23. Since the amount of air is reduced and the stroke of the piston 22 can be reduced, the occurrence of overshoot in the clutch device 10 can be reduced.

  Further, according to the clutch control device 2 according to the present embodiment, the required amount of air in the pressure chamber 23 changes from the first range to the second range or from the second range to the first range. In the air amount range, the first air supply valve 41 or the first exhaust valve 43 is controlled to supply the working fluid to the pressure chamber or discharge the working fluid from the pressure chamber. As a result, in the required air amount range, the amount of air supplied into or discharged from the pressure chamber 23 is the first air supply valve 41 and the second air supply valve 42, or the first exhaust gas. As compared with the case where the valve 43 and the second exhaust valve 44 are controlled, the stroke of the piston 22 can be reduced, so that the occurrence of overshoot in the clutch device 10 can be further reduced.

  The present invention is not limited to the embodiments described above, and can be appropriately modified and implemented without departing from the spirit of the present invention.

  For example, in the present embodiment, the current amount of air in the pressure chamber 23 is calculated based on the stroke of the piston 22 detected by the stroke sensor 18. However, for example, the air in the pressure chamber 23 is directly The amount may be detected, and various other methods can be used.

  In the above embodiment, the clutch actuator 20 is disposed at a position surrounding the input shaft 31. However, the clutch actuator 20 is disposed not at a position surrounding the input shaft 31 but at a position separated from the input shaft 31 and a predetermined support shaft The clutch device may be connected and disconnected by using a clutch lever that can be pivoted about the axis L. The present invention can be applied to various other clutch devices and clutch actuators.

  Furthermore, in the above embodiment, PID control is performed by the PID control unit 54. However, feedforward control may be performed, and processing for controlling various other valves may be performed.

  Furthermore, in the above embodiment, the PID control unit 54 performs the PID control based on the target value of the stroke of the piston 22. However, the PID control may be performed based on the target value of the air amount in the pressure chamber 23. Control may be performed based on various target values.

  Furthermore, in the above embodiment, the valve diameter of the second air supply valve 42 is smaller than that of the first air supply valve 41, and the second exhaust valve 44 is smaller than the first exhaust valve 43. Valve diameter is reduced, but the second supply valve 42 and the second exhaust valve 44 have a smaller flow rate of working fluid than the first supply valve 41 and the first exhaust valve 43. A pressure chamber may be supplied or exhausted from the pressure chamber, and various other valves may be used.

  Furthermore, in the above embodiment, the valve diameter of the second air supply valve 42 is smaller than that of the first air supply valve 41, and the second exhaust valve 44 is smaller than the first exhaust valve 43. Valve diameter is reduced, but for the first air supply valve 41, the second air supply valve 42, the first exhaust valve 43, and the second exhaust valve 44, the valves with the same flow rate are used. Good. In this case, as shown in FIG. 5, steps S14 to S18 of FIG. 4 may be changed to steps S21 to S23. That is, the valve control unit 55 determines the stroke amount to be adjusted of the piston 22 based on the feedback value, and then determines whether the value of the required air amount in the pressure chamber 23 is larger than a predetermined threshold value. (Step S21). Then, when the value of the required air amount in the pressure chamber 23 is larger than the predetermined threshold value (step S21: YES), the valve control unit 55 performs the first air supply valve 41 and the second air supply valve 42, Alternatively, if the first exhaust valve 43 and the second exhaust valve 44 are controlled (step S22) and the value of the required air amount in the pressure chamber 23 is less than or equal to a predetermined threshold (step S21: NO), the second The air supply valve 42 or the second exhaust valve 44 is controlled (step S23).

  Furthermore, although the change control is performed by two valves based on one threshold in the above embodiment, the change control may be performed by three or more valves arranged in parallel with different flow rates based on a plurality of thresholds.

  Furthermore, in the above embodiment, the clutch device 10 is brought into the disconnected state by supplying air into the pressure chamber 23, and the clutch device 10 is brought into the connected state by discharging air from the pressure chamber 23. Alternatively, the clutch device 10 may be brought into contact by supplying air thereto, and the clutch device 10 may be brought into disengagement by discharging air from the pressure chamber 23.

  Furthermore, in the above embodiment, the two first valves, the first air supply valve 41 and the first exhaust valve 43, are provided, and the second air supply valve 42 and the second exhaust valve 44 are provided. Although two valves are provided, they may be a first valve and a second valve which perform air supply and exhaust with a single valve, and various other valves may be used.

  Furthermore, although the clutch device 10 is provided with the diaphragm spring 16 in the above embodiment, it may be a coil spring, or may be a clutch device provided with various other springs.

  Furthermore, in the above embodiment, air was used as the working fluid, but hydraulic fluid may be used as the working fluid, and various other working fluids may be used.

  Furthermore, in the above embodiment, the PID control unit 54 executes PID control to determine the feedback value. However, various feedback controls other than PID control can be used, and may be combined with feedforward control.

  Furthermore, in the above embodiment, the threshold value at the time of clutch disengagement or clutch engagement is the same threshold value, but different threshold values may be used at the time of clutch disengagement and at the time of clutch engagement.

Reference Signs List 1 clutch system 2 clutch control device 10 clutch device 11 crankshaft 12 flywheel 13 clutch disc 14 pressure plate 15 clutch cover 16 diaphragm spring 17 release bearing 18 stroke sensor 20 clutch actuator 21 cylinder 22 piston 23 pressure chamber 24 open chamber 25 air supply Piping piping 26 Exhaust piping 31 Input shaft 41 First air supply valve 42 Second air supply valve 43 First exhaust valve 44 Second exhaust valve 50 ECU
51 clutch operation determination unit 52 target value setting unit 53 required air amount calculation unit (necessary working fluid amount calculation unit)
54 PID control unit 55 Valve control unit

Claims (8)

A clutch control device for connecting and disconnecting a clutch device by controlling a clutch actuator having a piston and a cylinder,
First and second valves disposed between the clutch actuator and an air supply / exhaust source for supplying a working fluid into a pressure chamber of the clutch actuator or discharging a working fluid from the pressure chamber;
A valve control unit that controls the first valve and / or the second valve;
A necessary working fluid amount calculating unit for calculating a necessary working fluid amount required in the pressure chamber based on a target working fluid amount in the pressure chamber and a current working fluid amount in the pressure chamber;
The valve control unit controls the first valve and the second valve when the required working fluid amount in the pressure chamber calculated by the required working fluid amount calculating unit is larger than a predetermined threshold. A clutch control device for supplying a working fluid into a pressure chamber or discharging a working fluid from the pressure chamber. The clutch control device according to claim 1, wherein the second valve supplies a working fluid having a flow rate smaller than that of the first valve into the pressure chamber or discharges the working fluid from the pressure chamber. The valve control unit controls the second valve to supply the working fluid to the pressure chamber or discharge the working fluid from the pressure chamber when the required working fluid amount in the pressure chamber is equal to or less than the threshold. The clutch control device according to claim 2, characterized in that: The valve control unit is configured to change the required amount of working fluid in the pressure chamber from a first range equal to or less than the threshold to a second range greater than the threshold or a predetermined period while the second range to the first range. The clutch according to claim 2 or 3, wherein the first valve is controlled to supply the working fluid into the pressure chamber or to discharge the working fluid from the pressure chamber within the required working fluid volume range. Control device. The clutch control device according to any one of claims 2 to 4, wherein the second valve has a valve diameter smaller than that of the first valve. The first valve is disposed between the clutch actuator and the air supply source, and is disposed between a first air supply valve for supplying a working fluid into the pressure chamber, and the clutch actuator and the exhaust source. And a first exhaust valve for discharging the working fluid from the pressure chamber,
The second valve is disposed in parallel with the first air supply valve, and supplies a second flow rate valve for supplying a working fluid having a smaller flow rate than the first air supply valve into the pressure chamber; And a second exhaust valve disposed in parallel with the first exhaust valve and discharging a working fluid having a flow rate smaller than that of the first exhaust valve from the pressure chamber.
The valve control unit controls the first air supply valve and the second air supply valve to supply the working fluid to the pressure chamber when the required amount of working fluid in the pressure chamber is larger than the threshold. The clutch control device according to any one of claims 2 to 5, wherein the working fluid is discharged from the pressure chamber by controlling the first exhaust valve and the second exhaust valve. A target value setting unit configured to set a target position of the piston when connecting and disconnecting the clutch device;
And a feedback control unit that executes feedback control based on the target position of the piston and the current position of the piston.
The valve control unit controls the first valve and / or the second valve based on the feedback control to supply working fluid into the pressure chamber or discharge working fluid from the pressure chamber. The clutch control device according to any one of claims 1 to 6, wherein The clutch control device according to any one of claims 1 to 7, wherein the threshold value differs between when the clutch device is disengaged and when the clutch device is in contact.

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