WO2011145565A1

WO2011145565A1 - Control device for flow control valve

Info

Publication number: WO2011145565A1
Application number: PCT/JP2011/061203
Authority: WO
Inventors: 嘉丈武井; 山本　康; 阿部　誠; 晋福永; 公幸河西; 智久窄
Original assignee: いすゞ自動車株式会社
Priority date: 2010-05-17
Filing date: 2011-05-16
Publication date: 2011-11-24
Also published as: JP2012002236A; JP5625492B2

Abstract

Provided is a control device for a flow control valve; the control device has a simple structure, is able to learn the location of a neutral position of the flow control valve, and corrects learned values. The control device comprises: an actuator (12) which is operated by means of a working fluid; a working fluid supply source (11) which supplies the working fluid; a stroke sensor (14) which detects the amount of strokes performed by the actuator (12); a flow control valve (15) which comprises a valve body (19) and is in communication with or is blocked from the actuator (12) in accordance with the movement of the valve body (19); and a control unit (20) which controls the valve body (19) in accordance with a detection value produced by the stroke sensor (14). The control unit (20) comprises: a learning unit (22) which learns the location of a neutral position; and a learned value correction unit (23) which corrects a learned value produced by the learning unit (22), said correction being performed on the basis of a map created in advance in accordance with the amount of deviation between the detection value produced by the stroke sensor (14) in the neutral position and the target stroke amount in the neutral position.

Description

Control device for flow control valve

The present invention relates to a flow rate control valve control device, and more particularly to a flow rate control valve control device that learns a neutral position of the flow rate control valve and corrects a learned value.

Generally, vehicles that control engagement of a clutch device that transmits engine torque to a mechanical automatic transmission using a clutch actuator have been developed and put into practical use. In such a vehicle, a clutch device is provided between the engine and the mechanical automatic transmission. The clutch device is connected and disconnected by movement of a piston of a clutch actuator that operates by air pressure or hydraulic pressure. The operation of the clutch actuator is performed by supplying or discharging the working fluid in the clutch actuator by a flow rate control valve provided with an electromagnetic solenoid.

An air supply passage communicating with the clutch actuator, a pressure source passage communicating with a working fluid pressure source such as an air tank, and an exhaust passage discharging the working fluid from the clutch actuator are connected to the flow control valve. Three ports, an air supply port, a pressure source port, and an exhaust port, are formed at predetermined intervals. In addition, a valve body is loosely fitted in the hollow portion of the flow control valve, and the above-described air supply port, pressure source port, and exhaust port are communicated and cut off as the valve body moves. Has been.

Specifically, when the clutch device is disengaged (completely closed), the valve body is moved to an air supply position where the air supply port communicates with the pressure source port and the exhaust port is shut off. Fluid is supplied into the clutch actuator. When the clutch device is connected (completely connected), the valve body is moved to an exhaust position where the air supply port and the exhaust port communicate with each other and the pressure source port is shut off, and the working fluid is transferred from within the clutch actuator. Discharge. Further, when the engagement of the clutch device is held at a predetermined disengagement position (disengagement retention), the valve body is moved to a neutral position where the air supply port is shut off, and the working fluid is retained in the clutch actuator. Yes.

For example, Patent Document 1 discloses a clutch control device to which this type of flow control valve is applied.

Japanese Patent No. 3417823

By the way, it is preferable that the clutch device is quickly connected and disconnected when shifting the vehicle. Therefore, in order to realize quick control, the ECU that controls the flow rate control valve stores in advance a flow rate characteristic indicating the relationship between the energization amount of the electromagnetic solenoid and the flow rate of the working fluid. Accordingly, the flow rate control valve is controlled so that the actual stroke amount becomes the target stroke. In order to realize accurate control, the neutral position of the flow control valve is learned, and the flow control valve is controlled based on the learned value.

However, the flow characteristics of the flow control valve may change due to the influence of aging of the flow control valve. In addition, there is a slight difference in the neutral position of the flow control valve between when the valve body of the flow control valve moves from the supply position to the neutral position and when it moves from the exhaust position to the neutral position. There is. As described above, when a change or difference occurs in the flow characteristics or the neutral position, the stroke amount overshoots or undershoots with respect to the target stroke amount, and it is difficult to control the flow control valve quickly and accurately. There is a problem.

The present invention has been made in view of such a problem, and provides a control device for a flow rate control valve capable of accurately correcting a learned value while learning a neutral position of the flow rate control valve with a simple configuration. For the purpose.

In order to achieve the above-described object, a control device for a flow control valve of the present invention includes an actuator that is operated by a working fluid, a working fluid supply source that supplies the working fluid, and a stroke sensor that detects a stroke amount of the actuator. A flow control valve that has a valve body that can move through the hollow portion, and that communicates with or is disconnected from the actuator by the movement of the valve body, and controls the amount of movement of the valve body according to the detection value of the stroke sensor And learning to learn the amount of movement of the valve body when it is determined that the neutral position is cut off from the actuator by the movement of the valve body based on the detection value of the stroke sensor. And a deviation amount between a detected value of the stroke sensor at the neutral position and a target stroke amount at the neutral position. Previously prepared based on the map, and having a learning value correcting unit for correcting the learning value by the learning section Te.

Further, the map is set so that the correction amount for correcting the learning value decreases as the deviation amount increases, and the correction amount for correcting the learning value increases as the deviation amount decreases. You may make it do.

In the map, as the deviation amount increases, the correction amount for correcting the learning value decreases in a predetermined step, and as the deviation amount decreases, the correction amount for correcting the learning value becomes a predetermined amount. You may make it set so that it may increase in a step.

In the map, an upper limit value and a lower limit value are provided for a correction amount for correcting the learning value in accordance with a range in which the valve body is disconnected from the actuator at the neutral position. Also good.

In addition, the control unit may determine that the valve body is in a neutral position when the amount of change in the detection value of the stroke sensor continues for a predetermined time and becomes a predetermined value or less.

The flow rate control valve includes a supply unit that communicates with the working fluid supply source, a discharge unit that discharges the working fluid from the actuator, and a communication unit that communicates with the actuator, and the learning unit includes the stroke The amount of movement of the valve element when the valve element is determined to be a neutral position where the valve element moves from the discharge part side and shuts off the communication part according to the detection value of the sensor, and the valve element moves from the supply part side Then, the movement amount as the neutral position of the valve body may be learned from the movement amount of the valve body when it is determined that the neutral position blocks the communication portion.

According to the control device for a flow control valve of the present invention, the learned value can be corrected accurately while learning the neutral position of the flow control valve with a simple configuration.

It is a block diagram which shows the control apparatus of the flow control valve concerning one Embodiment of this invention, and the drive system of a vehicle. It is sectional drawing which shows the detail of the flow control valve concerning one Embodiment of this invention. It is sectional drawing which shows the state which the flow control valve of FIG. 2 act | operated. It is sectional drawing which shows the neutral position of the flow control valve of FIG. It is a figure which shows the flow volume characteristic of the flow control valve which concerns on one Embodiment of this invention. It is a figure which shows the one aspect | mode of the stroke control by the control apparatus of the flow control valve concerning one Embodiment of this invention. It is a figure which shows the other aspect of the stroke control by the control apparatus of the flow control valve concerning one Embodiment of this invention. It is a figure which shows the learning value correction amount by the control apparatus of the flow control valve concerning one Embodiment of this invention. It is a flowchart which shows the learning control by the control apparatus of the flow control valve concerning one Embodiment of this invention. It is a flowchart which shows the learning value correction | amendment control by the control apparatus of the flow control valve concerning one Embodiment of this invention.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

1 to 10 illustrate one embodiment of the present invention. The same parts are denoted by the same reference numerals, and their names and functions are also the same. Therefore, detailed description thereof will not be repeated.

First, a drive system of a vehicle 1 to which a control device 10 for a flow control valve according to an embodiment of the present invention is applied will be described with reference to FIG. As shown in FIG. 1, the drive system of the vehicle 1 according to the present embodiment includes an engine (drive source) 100, a clutch device (clutch mechanism) 200, and a mechanical automatic transmission (transmission) 300.

Engine 100 is subjected to combustion control by an engine ECU (not shown) so as to generate torque according to the operating state of vehicle 1. Further, the output shaft 110 of the engine 100 is configured to be connectable to and disconnectable from the transmission input side 310 of the mechanical automatic transmission 300 by a clutch device 200 described later.

As shown in FIG. 1, the clutch device 200 is a dry single-plate clutch device, and includes a flywheel 210, a clutch disk 220, and a return spring 230.

The flywheel 210 is fixed to the output shaft 110 of the engine 100 by bolts and nuts (not shown). The clutch disk 220 is provided with a wear plate (not shown) in the periphery thereof, and is slidably splined to a transmission input shaft 310 of a mechanical automatic transmission 300 described later. Further, one end of a release fork 13 described later is attached to the clutch disk 220. The return spring 230 is provided between one end of the clutch disk 220 and the mechanical automatic transmission 300, and is attached so as to urge the clutch disk 220 in the direction of the engine 100 (the arrow X direction in FIG. 1). Yes.

The mechanical automatic transmission 300 adjusts the torque of the engine 100 transmitted through the flywheel 210 and the clutch disc 220 to a desired rotational speed by engaging the flywheel 210 and the clutch disc 220. After that, it is configured to transmit to a propeller shaft or the like (not shown).

Hereinafter, a control device 10 for a flow control valve according to an embodiment of the present invention will be described with reference to FIGS.

As shown in FIGS. 1 and 2, a control device 10 for a flow control valve according to this embodiment includes a pressure supply source (working fluid supply source) 11, a clutch actuator (actuator) 12, a release fork 13, and a stroke sensor 14. A flow control valve 15, an air supply passage 16, a pressure source passage 17, an exhaust passage 18, and a clutch control ECU (control unit) 20.

The pressure supply source 11 is a pneumatic tank or the like, and supplies the working fluid to the flow control valve 15 as shown in FIG. The pressure supply source 11 is connected to a pressure source passage 17 that communicates with a pressure source port 17a of a flow rate control valve 15 described later.

As shown in FIG. 1, the clutch actuator 12 has a cylinder body 12a having a cylinder chamber and a piston 12b slidably fitted in the cylinder chamber. An exhaust passage 18 communicating with the exhaust port 18 a of the flow control valve 15 is connected to the side surface of the cylinder body 12 a, and the working fluid in the cylinder chamber is discharged through the flow control valve 15. An air supply passage 16 communicating with the air supply port 16a of the flow control valve 15 is connected to the side surface of the cylinder body 12a, and the working fluid fed from the pressure supply source 11 via the flow control valve 15 is connected. The piston 12b is configured to be moved in the arrow X direction in FIG. 1 by the pressure.

As shown in FIG. 1, the release fork 13 has one end supported by the tip of the piston 12 b of the clutch actuator 12 and the other end attached to the clutch disc 220. Further, the release fork 13 is pivotally supported at its center by a support shaft 13a. That is, when the working fluid is supplied into the cylinder chamber of the clutch actuator 12 and the piston 12b moves in front of the vehicle 1 (in the direction of the arrow X in FIG. 1), the release fork 13 is moved in front of the vehicle 1 (in FIG. 1). Energized in the direction of arrow X). And the release fork 13 is comprised so that the engagement of the clutch apparatus 200 may be cut | disconnected by rotating counterclockwise in FIG. 1 centering on the spindle 13a. When the working fluid in the cylinder chamber of the clutch actuator 12 is discharged, the release fork 13 is urged rearward (in the direction of arrow Y in FIG. 1) by the urging force of the return spring 230, and the support shaft It is configured to connect the engagement of the clutch device 200 by turning clockwise about the position 13a in FIG.

As shown in FIG. 1, the stroke sensor 14 detects the stroke amount of the clutch actuator 12, and the detected value S is output to a clutch control ECU 20 described later.

As shown in FIGS. 1 and 2, the air supply passage 16 has one end connected to the cylinder chamber of the clutch actuator 12 and the other end connected to an air supply port 16a of a flow control valve 15 described later.

As shown in FIGS. 1 and 2, the pressure source passage 17 has one end connected to the pressure supply source 11 and the other end connected to a pressure source port 17a of a flow control valve 15 described later.

As shown in FIGS. 1 and 2, the discharge passage 18 has one end connected to the cylinder chamber of the clutch actuator 12 and the other end connected to an exhaust port 18a of the flow control valve 15 described later.

As shown in FIG. 2, the flow control valve 15 includes a control valve body 15a having a hollow portion therein, a valve body 19 slidably inserted into the hollow portion, an electromagnetic solenoid 15b, a spring 15c, Have Further, on the side of the control valve main body 15a, an air supply port (communication portion) 16a, a pressure source port (supply portion) 17a, connected to the above-described air supply passage 16, pressure source passage 17, and discharge passage 18 are provided. Exhaust ports (discharge portions) 18a are formed at a predetermined interval. In the present embodiment, the air supply port 16a is disposed so as to be positioned between the pressure source port 17a and the exhaust port 18a.

The valve body 19 has three lands, that is, an air supply shut-off portion 19a, a pressure source shut-off portion 19b, and the air supply port 16a, the pressure source port 17a, and the exhaust port 18a. Discharge blocking portions 19c are provided at predetermined intervals. Further, one end of the valve body 19 is connected to the movable yoke of the electromagnetic solenoid 15b, and the other end is urged by the spring 15c in the direction of the arrow X in FIG.

That is, the position of the valve body 19 is determined by the balance between the magnetic force acting on the movable yoke of the electromagnetic solenoid 15b and the urging force of the spring 15c. For example, when energization to the electromagnetic solenoid 15b is stopped (the energization amount is 0%), the valve body 19 is urged by the spring 15c to the position (exhaust position) of FIG. As a result, the air supply port 16a and the exhaust port 18a communicate with each other, and the working fluid in the cylinder chamber of the clutch actuator 12 is discharged, whereby the engagement of the clutch device 200 is connected (completely connected). When the energization amount to the solenoid 15b is the maximum value (100%), the valve body 19 compresses the spring 15c to the position (supply position) of FIG. 3B, and the supply port 16a and the pressure source port 17a And communicate. Thereby, the working fluid of the pressure supply source 11 is sent into the cylinder chamber of the clutch actuator 12 from the air supply port 16a, and the engagement of the clutch device 200 is disconnected (completely cut). When the energization amount to the electromagnetic solenoid 15b is 50%, the valve element 19 is in the position (neutral position) shown in FIG. The connection amount of 200 is held at a predetermined amount (cut off).

The control ECU (control unit) 20 includes a known CPU, ROM, and the like, and includes an operation control unit 21, a neutral position learning unit (learning unit) 22, and a learning value correction unit 23 as functional elements. Yes.

In addition, although each of these functional elements is provided in control ECU20 which is integral hardware in this embodiment, any one of these can also be provided in separate hardware.

The operation control unit 21 outputs a control signal that is an energization amount to the electromagnetic solenoid 15b of the flow control valve 15 so that the clutch device 200 operates in a complete contact, complete disconnection, disconnection hold, and complete connection when the vehicle 1 is shifted. To do. This control output value is set by a feedback control value (FB control value) + a feed forward control value (FF control value).

The operation control unit 21 stores a flow rate characteristic map (a map created in advance) indicated by a solid line A ₀ in FIG. 5 representing the relationship between the energization amount to the electromagnetic solenoid 15b and the flow rate of the working fluid. Further, at the time of shifting of the vehicle 1, to realize a clutch stroke (connection weight) shown in solid line alpha ₀ in FIG. 6, the target waveform shown in dashed beta ₀ in FIG. 6 (a target stroke amount) is stored in advance. FB control value, using a target waveform shown in dashed beta ₀ in FIG. 6, in accordance with the difference between the current stroke (detected value S) and the target stroke amount, for example, feed such as known PID control Calculated by the back control equation.

The FF control value is calculated by adding an initial value to the learning value output from the neutral position learning unit 22 described later using the flow rate characteristic map of FIG. 5 (FF control value = learning value + initial value). value).

The neutral position learning unit (learning unit) 22 is a neutral position where the valve body 19 blocks the flow of the working fluid of the flow control valve 15 when the engagement of the clutch device 200 is in the disconnected state (see FIG. 3C). ) To calculate the learning value. This learned value is a value for correcting the initial value so that the stroke amount becomes the target stroke amount regardless of the individual difference or aging of the flow control valve 15 when the engagement of the clutch device 200 is in the disconnected state. . The initial value is calculated based on, for example, the flow rate characteristic map of FIG. 5 stored in advance in the operation control unit 21. Specifically, the learning value is learned by subtracting the initial value from the energization amount E ₁ to the electromagnetic solenoid 15b when it is determined that the valve element 19 of the flow control valve 15 is in the neutral position. ing.

In this embodiment, as shown in FIG. 6, the energization amount (FF control value) is such that the valve body 19 of the flow control valve 15 is in the exhaust position, the supply position, and the neutral position (the clutch device 200 is completely connected). The energization amount E ₁ at the neutral position on the supply side (see FIG. 4 (a)) at the time of movement is used. For example, as shown in FIG. When the valve body 19 is moved from the exhaust position to the air supply position to the neutral position and then moved from the neutral position to the exhaust position to the neutral position to the exhaust position, the valve body 19 of the flow control valve 15 is moved from the neutral position to the exhaust position. ~ neutral position - the exhaust position and the neutral position of the exhaust side as it moves (see FIG. 4 (b)) energization amount E ₂ also calculates the energization amount of the energization amount E ₁ and the exhaust side of the air supply side E ₂ _May be used as the FF control value.

Whether or not the flow control valve 15 is in the neutral position is determined based on the detection value S output from the stroke sensor 14 when the stroke change speed is substantially zero. Judge that there is. In this embodiment, the neutral position is determined based on the differential value of the stroke amount. Specifically, the stroke S ₁ and the stroke S ₂ after a certain time t has elapsed from the time when the stroke S ₁ was detected are detected, and the differential that is the stroke change rate when the certain time t has elapsed. If the value D (D = (S ₁ −S ₂ ) / t) is equal to or less than a predetermined value, it is determined that the stroke change speed is substantially zero. In addition, in order to determine a state in which the change speed of the stroke is more stable, a plurality of differential value D calculation cycles are continuously provided during a predetermined time t, and all the differential values D are equal to or less than a predetermined value. Only the stroke change speed may be determined to be substantially zero.

The neutral position learning unit 22 outputs the learned value learned as described above to the operation control unit 21. Further, the operation control unit 21 calculates an FF control value by adding an initial value to the output learning value (FF control value = initial value + learning value) and stores it. Specifically, the solid line A ₀ (initial value) of the flow rate characteristic map of FIG. 5 is corrected and stored as a broken line B ₁ moved according to the learning value.

The learned value correcting unit 23 is the actual stroke amount (detected value S) when the flow rate control valve 15 is controlled to the neutral position by the control signal (FF control value + FB control value) output from the operation control unit 21. The deviation amount X, which is the difference from the target stroke amount, is calculated, and the FF control value is corrected according to the deviation amount X.

Specifically, the neutral position learning unit 22 stores a linear map of FIG. 8A that shows the relationship between the deviation amount X determined in advance by experiments or the like and the correction amount Y to the FF control value. The FF control value is corrected by reading the correction amount Y corresponding to the shift amount X from the linear map. For example, when the deviation amount X shows a positive value (plus value), the stroke amount overshoots as shown by the solid line α ₁ in FIG. 6, so the correction amount Y is a negative value (minus), That is, the correction amount Y is subtracted from the FF control value (FF control value−Y). On the other hand, when the shift amount X showed a negative value (minus), the stroke volume is undershoots as shown by the solid line alpha ₂ in FIG. 6, the correction amount Y is a positive value (plus), i.e. The correction amount Y is added to the FF control value (FF control value + Y). In the present embodiment, the relationship between the deviation amount X and the correction amount Y has been described using the linear map of FIG. 8A. For example, as shown in FIG. 8B, the neutral position of the flow control valve 15 is determined. Depending on the range, a map in which an upper limit value Y _max and a lower limit value Y _{min of} the correction amount Y are provided, and as shown in FIG. 8C, the deviation amount X and the correction amount Y are stepped within a predetermined range. It is also possible to use a non-linear map such as a map changed (increased or decreased in a predetermined step).

Further, the learning value correction unit 23 outputs the corrected FF control value (FF control value ± Y) to the output control unit 21 as a new FF control value. That is, the FF control value stored in the output control unit 21 is replaced with this corrected new FF control value (FF control value ± Y). Thereafter, in accordance with the replaced new FF control value (FF control value ± Y), the broken line B _{1 in} the flow characteristic map of FIG. 5 is corrected to the broken line B ₂ and the broken line B ₃ .

Since the control device 10 of the flow control valve according to the embodiment of the present invention is configured as described above, the following control is performed according to the flowcharts shown in FIGS. Is called.

First, according to the flow of FIG. 9, the neutral position learning control by the control device 10 of the flow control valve according to the embodiment of the present invention will be described.

When a shift operation of the vehicle 1 is performed by the operator, first, in step (hereinafter, step is simply referred to as S) 100, a control signal output from the operation control unit 21 of the valve body 19 of the flow control valve 15 is shown. In response to this, it moves from an exhaust position to an air supply position to a neutral position (the clutch device 200 is connected, disconnected, and disconnected).

In S110, the neutral position learning unit 22 has the differential value D, which is the stroke change speed, based on the detection value S output from the stroke sensor 14 or less (the stroke change speed is substantially zero). It is determined whether or not. If the differential value D continues for a predetermined time and is equal to or less than the predetermined value, it is determined that the flow control valve 15 is in the neutral position, and the routine proceeds to step 120. On the other hand, if the differential value D continues for a predetermined time and is not less than the predetermined value, it is determined that the flow control valve 15 is not in the neutral position, and the neutral position learning control is returned.

In S120, the neutral position learning unit 22, the energization amount E ₁ when it is determined that the neutral position in S110 described above it is read.

In S130, the learning value obtained by subtracting the initial value from the power supply amount E ₁ read in S120 described above are stored.

In S140, the operation control unit 21 corrects the solid line A ₀ (initial value) of the flow characteristic map of FIG. 5 to the broken line B ₁ according to the learned value, and the present control is returned.

Next, learning value correction control by the control device 10 of the flow control valve according to the embodiment of the present invention will be described according to the flow of FIG.

When the speed change operation of the vehicle 1 is performed by the operator, first, in S200, control signals of the FF control value (learned value + initial value) and the FB control value are output to the flow rate control valve 15, and this output value ( In accordance with (FF control value + FB control value), the clutch device 200 operates in the connected, disconnected, and disconnected state.

In S210, the neutral position learning unit 22 determines that the differential value D, which is the stroke change speed, is equal to or less than a predetermined value (the stroke change speed is substantially zero) based on the detection value S output from the stroke sensor 14. It is determined whether or not. If the differential value D continues for a predetermined time and is equal to or less than the predetermined value, it is determined that the flow control valve 15 is in the neutral position on the supply side, and the process proceeds to S220. On the other hand, if the differential value D continues for a predetermined time and is not less than or equal to the predetermined value, it is determined that the flow control valve 15 is not in the neutral position, and the learning value correction control is returned.

In S220, the learning value correction unit 23 reads the actual stroke amount (detected value S) when determined to be in the neutral position, and the detected value S is compared with the target stroke. If the deviation amount X (absolute value) between the detection value S and the target stroke amount is equal to or greater than the threshold value, the process proceeds to S230. On the other hand, when the deviation amount X (absolute value) is less than the threshold value, it is determined that correction of the learning value is unnecessary, and this control is returned. Here, the threshold value can be set to an arbitrary value according to the characteristics of the clutch device 200.

In S230, it is determined whether the deviation amount X is a positive value or a negative value. When the deviation amount X is a positive value, the process proceeds to S240. On the other hand, if the deviation amount X is a negative value, the process proceeds to S260.

In S240, based on the fact that the deviation amount X calculated in S230 is a positive value, the correction amount Y to be subtracted from the FF control value is read from the linear map of FIG. Correction is performed. That is, since the stroke amount is overshooting, the correction value (FF control value-Y) obtained by subtracting the correction amount Y from the FF control value is stored as a new FF control value, and the process proceeds to S250.

In S250, the operation control unit 21, is stored the new FF control value (FF control value -Y) is taken up in S250 described above, the flow rate characteristic map of FIG. 5 has been fixed to the broken line B _2, the control Returned.

On the other hand, if it is determined in step 230 that the deviation amount X is a negative value, the correction amount Y to be added to the FF control value is read from the linear map of FIG. Value correction is performed. That is, since the stroke amount is undershooting, the correction value (FF control value + Y) obtained by adding the correction amount Y to the FF control value is stored as a new FF control value, and the process proceeds to S270.

In S270, the operation control unit 21, a new FF control value stored in S260 described above (FF control value + Y) is taken, the flow rate characteristic map of FIG. 5 has been fixed to the broken line B _3, the control returns Is done.

According to the control as described above, the flow rate control valve control device 10 according to the embodiment of the present invention has the following operations and effects.

That is, when the neutral position learning unit 22 learns the neutral position of the flow rate control valve 15 based on the detection value S output from the stroke sensor 14, it is determined that the stroke change speed is substantially zero. Done.

Therefore, since the neutral position of the flow rate control valve 15 is learned in a state where the stroke does not change and the behavior of the clutch device 200 is stable, the variation in the learned value can be reduced.

Further, the neutral position learning unit 22 learns the neutral position of the flow control valve 15 by energization at the neutral position on the supply side when the valve body 19 of the flow control valve 15 moves from the exhaust position to the supply position to the neutral position. amount E _1, the valve body 19 of the flow control valve 15 to calculate the average value E _Ave between energization amount E ₂ at the neutral position of the exhaust side in moving the neutral position and the exhaust position and the neutral position and the exhaust position The average value E _Ave may be learned as the FF control value corresponding to the neutral position of the flow control valve 15.

Therefore, as shown in FIGS. 4A and 4B, the diameter L ₁ of the air supply blocking portion 19a of the valve body 19 is larger than the opening diameter L ₂ of the air supply port 16a (L ₁ > L ₂ ). Even if there is a slight difference L between the neutral position on the supply side and the neutral position on the exhaust side, the neutral position of the flow control valve 15 can be learned accurately.

Further, the learning value correction unit 23 is an actual stroke when the flow rate control valve 15 is controlled to the neutral position according to the FF control value (initial value + learning value) + FB control value output from the operation control unit 21. A deviation amount X between the amount (detection value S) and the target stroke amount is calculated, and the FF control value (initial value + learning value) is corrected according to the deviation amount X.

Therefore, the learning accuracy of the neutral position can be further improved by correcting the learning value of the neutral position learning unit 22 by the learning value correction unit 23. Naturally, after correction, clutch control is performed according to the corrected learning value, so that occurrence of a shift shock when the vehicle 1 is shifted can be effectively suppressed.

Further, when the deviation amount X shows a positive value (the stroke amount is overshoot), the learning value correction unit 23 subtracts the correction amount Y from the FF control value (FF control value−Y) to obtain the deviation amount X. Indicates a negative value (the stroke amount is undershoot), the correction amount Y is added to the FF control value (FF control value + Y).

Therefore, by executing the control based on the corrected learning value, it is possible to effectively reduce the stroke amount undershoot and overshoot, and naturally, the shift shock during the shift is effectively generated. Can be suppressed.

It should be noted that the present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present invention.

For example, in the above-described embodiment, the flow rate control valve control device 10 of the present invention has been described as being applied to the clutch device 200, but can be applied to all control systems controlled by a quantitative proportional valve. .

Further, in the present embodiment, the flow control valve 15 is provided with an air supply port 16a, a pressure source port 17a, and an exhaust port 18a, and the air supply passage 16, the pressure source passage 17, and the exhaust passage are connected to the respective ports. However, for example, the flow control valve 15, the working fluid supply source 11, and the clutch actuator 12 are provided adjacent to each other, and the supply passage 16, the pressure source passage 17, and the exhaust passage 18 are omitted. You may comprise.

In the present embodiment, the supply port 16a has been described as being disposed between the pressure source port 17a and the exhaust port 18a. However, the positional relationship between the ports is not limited to this, for example, The pressure source port 17a may be disposed between the air supply port 16a and the exhaust port 18a.

The fluid pressure of the working fluid that operates the clutch actuator 12 can be applied to the control device 10 of the flow control valve of the present invention regardless of whether it is pneumatic or hydraulic.

In the present embodiment, the flow control valve 15 has been described as being controlled by the amount of current supplied to the electromagnetic solenoid. However, for example, a flow control valve 15 that is controlled by using a pulse motor and changing the number of pulses is applied. You can also

DESCRIPTION OF SYMBOLS 1 Vehicle 10 Control apparatus of flow control valve 11 Pressure supply source (working fluid supply source)
12 Clutch actuator (actuator)
14 Stroke sensor 15 Flow control valve 16a Air supply port (communication part)
17a Pressure source port (supply part)
18a Exhaust port (exhaust part)
19 Valve body 20 Control ECU (control part)
21 Operation control unit 22 Neutral position learning unit (learning unit)
23 Learning value correction unit

Claims

An actuator actuated by a working fluid;
A working fluid supply source for supplying the working fluid;
A stroke sensor for detecting a stroke amount of the actuator;
A flow control valve having a valve body capable of moving through the hollow portion, and being in communication with or cut off from the actuator by movement of the valve body;
A control unit for controlling the amount of movement of the valve body according to the detection value of the stroke sensor;
The control unit learns the amount of movement of the valve body when it is determined that the neutral position is cut off from the actuator by the movement of the valve body, based on the detection value of the stroke sensor;
A learning value correction unit that corrects a learning value by the learning unit based on a map created in advance according to a deviation amount between a detection value of the stroke sensor at the neutral position and a target stroke amount at the neutral position. A control device for a flow rate control valve.
In the map, as the deviation amount increases, the correction amount for correcting the learning value decreases,
The control device for a flow control valve according to claim 1, wherein the correction amount for correcting the learning value is set to increase as the deviation amount decreases.
In the map, as the shift amount increases, the correction amount for correcting the learning value decreases in a predetermined step, and
The control device for a flow control valve according to claim 1, wherein the correction amount for correcting the learning value is set to increase in a predetermined step as the deviation amount decreases.
The map is provided with an upper limit value and a lower limit value for a correction amount for correcting the learning value according to a range in which the valve body is disconnected from the actuator at the neutral position. The flow rate control valve control device according to any one of claims 1 to 3.
The control unit according to any one of claims 1 to 4, wherein when the amount of change in the detection value of the stroke sensor is continuously equal to or less than a predetermined value, the valve body is determined to be in a neutral position. The control apparatus of the flow control valve of any one of Claims.
The flow rate control valve includes a supply unit that communicates with the working fluid supply source, a discharge unit that discharges the working fluid from the actuator, and a communication unit that communicates with the actuator.
The learning unit detects, based on a detection value of the stroke sensor, a movement amount of the valve body when the valve body is determined to be a neutral position where the valve body moves from the discharge unit side and blocks the communication unit, and the valve body The amount of movement as the neutral position of the valve body is learned from the amount of movement of the valve body when it is determined as a neutral position that moves from the supply section side and blocks the communication section. The flow rate control valve control device according to any one of claims 1 to 5.