JP2002317879A - Spool valve device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spool valve device having first and second outlet ports with a spool hole reduced in size in the axial direction. SOLUTION: A valve body 30 of a hydraulic control valve device C as the spool valve device has an inlet port 44 opening to the spool hole 33 to which a spool 34 is slidably fitted, the first and second outlet ports 41, 42, a first valve body 31 in which a drain port 40 is formed, and a second valve body 32 in which a pilot pressure control valve is mounted for controlling the position of the spool 34, all of them being joined together on joint surfaces 31a, 32a parallel to the axial direction L1 of the spool hole 33. The inlet port 44 opens to the joint surface 31a, and a communication port 57 is formed in the spool 34. When the spool 34 occupies a first position, the first outlet port 41 is shut off the drain port 40 and communicated with the inlet port 44 and the second outlet port 42 is shut off the inlet port 44 and communicated with the drain port 40 via the communication port 57.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spool valve device, and is used in a hydraulic control mechanism for changing a valve operating characteristic of an intake valve or an exhaust valve in, for example, a valve train of an internal combustion engine.

[0002]

2. Description of the Related Art A spool valve body structure disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-170941 is known as this type of apparatus. In this spool valve body structure, a sleeve in which the spool valve is slidably housed in the spool valve body, a spool valve chamber into which the sleeve is inserted, an oil introduction passage, a relief opening, and a valve train of the internal combustion engine An operating hydraulic pressure supply opening communicating with a variable valve timing switching mechanism provided in the device is provided, and an electromagnetic valve body to which an electromagnetic valve is attached is coupled to an end surface of the spool valve body in the axial direction of the spool valve. You. The communication and disconnection between the oil introduction passage and the operating hydraulic pressure supply opening and the disconnection and communication between the operating hydraulic pressure supply opening and the relief opening are controlled by a spool valve that moves according to the hydraulic pressure controlled by the electromagnetic valve. The oil introduction passage is provided so as to overlap with the spool valve chamber when viewed from the axial direction of the spool valve chamber.
The size is reduced in a direction orthogonal to the axial direction.

Further, two switching ports, a port A and a port B (both corresponding to outlet ports), which are two switching ports through which a fluid flowing from a P port (corresponding to an inlet port) flows out, are provided. It is also known that it is equipped (“Valve Glossary”, edited by Japan Valve Manufacturers Association, 1st edition, 2nd printing, Ohmsha (January 30, 1991)
Day), p. 85, 86 (Fig. 11). In this switching valve, a hole communicating with the R port (return port) is formed inside the spool, and when the spool moves to one side, the B port communicates with the R port via the hole. A pilot valve driven by an electromagnet is connected to a side surface of the valve body that accommodates the spool along the axial direction of the spool.

[0004]

By the way, in the former prior art, the electromagnetic valve for controlling the position of the spool valve is attached to the electromagnetic valve body connected to the end face of the spool valve body. There has been a drawback in that the valve device composed of the valve body is enlarged in the axial direction, and it is difficult to mount the valve device in a place where the dimension in the axial direction is restricted.

In the latter prior art, the size of the valve body in the axial direction due to an increase in the number of ports is increased due to the structure of the spool valve in which each port is provided in the valve body in the axial direction. The sharing of the R port for the A and B ports is suppressed, and the pilot valve is coupled to the side surface of the valve body, thereby suppressing the size of the switching valve in the axial direction. However, since the P, A, B, and R ports are provided in the valve body in the axial direction, downsizing of the switching valve in the axial direction has not been thoroughly performed.

The present invention has been made in view of such circumstances, and the inventions according to claims 1 to 4 are:
It is a common object to further reduce the size of the spool valve device having the first and second outlet ports in the axial direction of the spool hole. The invention according to claim 2 further aims at facilitating the processing of the inlet port and improving the response of the movement of the spool, and the invention according to claim 3 further provides maintenance of the spool valve device. The purpose is to improve the performance.

[0007]

According to the first aspect of the present invention, there is provided an inlet port having a spool hole in which a spool is slidably fitted, and one end opening to each of the spool holes. A first valve body in which an outlet port and a drain port are formed, and a second valve body to which position control means for controlling the position of the spool is attached.
A valve body configured to be coupled with a coupling surface parallel to an axial direction of the spool hole, and between the inlet port and the outlet port, and between the drain port and the outlet port according to a position of the spool. Wherein the outlet port includes a first outlet port and a second outlet port, the other end of the inlet port being open to the coupling surface, One outlet port, the other end of the second outlet port and the other end of the drain port open to the outer surface of the first valve body other than the coupling surface, a communication port is formed inside the spool,
When the spool occupies the first position, the first outlet port is shut off from the drain port and communicates with the inlet port, and the second outlet port is shut off from the inlet port and through the communication port. When the spool occupies the second position, the first outlet port is shut off from the inlet port and is connected to the drain port, and the second outlet port is connected to the inlet port. And a spool valve device that is shut off from the communication port.

According to the first aspect of the invention, the following effects can be obtained. That is, in the spool valve device having the first and second outlet ports, at the first position of the spool,
The second outlet port communicates with the drain port via a communication port formed inside the spool, and at the second position of the spool, the first outlet port communicates with the drain port. 1, because the spool valve device can be shared by the second outlet port and the position control means is attached to the second valve body coupled to the first valve body at a coupling surface parallel to the axial direction of the spool hole. Direction, and the other end of the inlet port opens to the connecting surface of the first valve body with the second valve body.
On the outer surface of the valve body, the inlet port does not need to be opened in the axial direction along with the first and second outlet ports and the drain port, so that the valve body and, consequently, the spool valve device are further downsized in the axial direction. You.

According to a second aspect of the present invention, in the spool valve device according to the first aspect, the position control means is a pilot pressure control valve for controlling a pressure of a pilot fluid acting on the spool, and the inlet port is provided. The inlet port is formed of a groove that opens to the coupling surface, and
A communication passage formed in the valve body and communicating with the pilot pressure control valve is communicated.

According to the second aspect of the present invention, the following effects can be obtained in addition to the effects of the first aspect of the present invention. That is, since the inlet port is formed from a groove that opens to the coupling surface, the processing is easy, and the degree of freedom of the formation position for communicating with the spool hole and the communication passage is large. Can simplify the shape of the communication passage formed in the communication passage, facilitate the processing of the communication passage, reduce the pressure loss in the communication passage, and improve the responsiveness of the movement of the spool. it can.

According to a third aspect of the present invention, in the spool valve device according to the second aspect, the pilot pressure control valve has a substantially operating axis on a plane orthogonal to the axial direction, and is orthogonal to the axial direction. The pilot pressure control valve is attached to a position overlapping with the spool hole when viewed from the direction in which the pilot pressure control valve is attached to the device, and the pilot pressure control valve is detachably attached from above.

According to the third aspect of the present invention, the following effects are obtained in addition to the effects of the cited invention. That is, the pilot pressure control valve is mounted on a position where its operating axis is on a plane orthogonal to the axial direction and overlaps with the spool hole when viewed from the direction orthogonal to the axial direction. Downsizing in the axial direction. In addition, since the pilot pressure control valve is detachably attached to the second valve body from above while the spool valve device is attached to the device, the pilot pressure control valve can be easily attached and detached while attached to the device. Therefore, the maintainability of the spool valve device is improved.

According to a fourth aspect of the present invention, in the spool valve device according to any one of the first to third aspects,
The spool valve device is attached to a device on an attachment surface thereof, and the outer surface of the first valve body is the attachment surface.

According to the invention described in claim 4, in addition to the effects of the invention described in the cited claims, the following effects are exerted. That is, since the inlet port formed in the first valve body is formed on the coupling surface which is different from the mounting surface on which the drain port and the first and second outlet ports are opened,
Of course, the ports adjacent to each other among the first and second outlet ports and the drain port can be arranged close to each other in the axial direction.
The first valve body and, consequently, the spool valve device are miniaturized in the axial direction.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory diagram of a hydraulic valve operating characteristic changing mechanism provided in a valve train of a multi-cylinder internal combustion engine as a device in which a spool valve device according to the present invention is used as a hydraulic control valve device. Shows the head viewed from above in the direction of the center axis of the cylinder,
Some of them are shown in cross section. Since FIG. 1 is merely an explanatory diagram, the dimensional relationship between the hydraulic control valve device and the valve gear does not match the actual one.

The internal combustion engine mounted on a vehicle includes an overhead camshaft type valve operating device V. The valve operating device V includes a cylinder head 1 coupled to an upper end of a cylinder block, and an upper end of the cylinder head 1. And a head cover connected to the valve cover 2.

A combustion chamber is formed between the cylinder head 1 and a piston slidably fitted to each cylinder formed in the cylinder block, and the cylinder head 1 communicates with each of the combustion chambers. A camshaft 3 formed with an intake port and an exhaust port, and further driven to rotate at half the number of revolutions of a crankshaft driven by the piston;
Are inserted into insertion holes of a plurality of cam holders integrally formed with the cylinder head 1 at intervals in the direction of the rotation axis L1 of the cam shaft 3, and are rotatably supported by the journal portions. For each of the combustion chambers, a pair of intake valves and a pair of exhaust valves slidably supported by the cylinder head 1 include a camshaft 3, cams 4 to 6 provided on the camshaft 3, a rocker shaft 7,
The rocker arm is swingably supported by the rocker shaft 7 and is operated by a valve operating device V having a valve operating characteristic changing mechanism T. At a predetermined timing, a pair of openings on the combustion chamber side of the intake port and A pair of openings on the combustion chamber side of the exhaust port are opened and closed.

Some of the cylinders of the internal combustion engine are stopped during fuel-conserving operation such as during low-load operation. For this reason, the valve train V is provided with the intake valve and the exhaust valve during the partial cylinder stop operation. Valve operating characteristic changing mechanism T for maintaining the valve closed state
Is provided.

The valve operating characteristic changing mechanism T provided on the intake valve side will be mainly described below with reference to FIG. The camshaft 3 has an intake cam 4 for each combustion chamber,
A pair of rest cams 5 located on both sides of the intake cam 4
And a pair of exhaust cams 6 located on both sides of the intake cam 4 and the pause cams 5. The intake cam 4 and the exhaust cam 6 have a cam profile including a base circle portion and a nose portion having a predetermined lift amount and an operating angle. It has a cam profile consisting of only a base circle portion having the same radius, and maintains the intake valve and the exhaust valve in a closed state during a partial cylinder deactivation operation.

A rocker shaft 7 inserted into the insertion holes of the plurality of rocker shaft holders fastened to the cylinder head 1 by bolts has a pair of drive rocker arms 8 and 9 corresponding to the respective combustion chambers. Free rocker arm located between
10 is swingably supported.

At one end of each drive rocker arm 8, 9,
Slippers 8a, 9a are formed which are in sliding contact with the rest cam 5,
At the other end, a tappet screw 8 that contacts the intake valve
b and 9b are provided. On the other hand, at one end of the free rocker arm 10, a roller 10a that is in rolling contact with the intake cam 4 is rotatably supported. The free rocker arm 10 is attached to the intake cam 4 by a spring of a lost motion mechanism supported by the cylinder head 1. It is urged toward.

The drive rocker arms 8 and 9 extend between the drive rocker arms 8 and 9 and the free rocker arm 10.
There is provided a valve operating characteristic changing mechanism T that enables switching between connection and disconnection between the arm and the free rocker arm 10. The valve operating characteristic changing mechanism T includes a connecting piston 11 that can connect the drive rocker arm 8 and the free rocker arm 10, and a connecting pin 12 that can connect the drive rocker arm 9 and the free rocker arm 10.
A release piston 13 for restricting the movement of the connecting pin 12 and bringing the drive rocker arms 8, 9 and the free rocker arm 10 into a disconnected state; a releasing piston 13 for bringing the connecting pin 12 into contact with the connecting piston 11; A return spring 14 for contacting the drive spring 13, a first hydraulic chamber 15 formed in the drive rocker arm 8 for supplying and discharging hydraulic oil for moving the connecting piston 11 and accommodating the return spring 14, and a drive rocker arm 9. Then, a hydraulic oil for moving the release piston 13 is supplied / discharged and a second hydraulic chamber 16 is provided.

In a hollow portion of each cylindrical rocker shaft 7, a first hydraulic oil passage 18 formed between the pipe 17 and the rocker shaft 7 and a pipe 17 are formed by a pipe 17 inserted into the hollow portion. A second working oil passage 19 formed by the hollow portion is defined. The first hydraulic chamber 15 is always in communication with the first hydraulic oil passage 18 via a communication passage 20 formed in the drive rocker arm 8, and the second hydraulic chamber 16 is connected to the drive rocker arm 9 and the pipe.
The second hydraulic oil passage 19 is always in communication with a second hydraulic oil passage 19 through a communication passage 21 formed in the passage 17.

The first and second working oil passages 18 and 19 are connected to a cylinder valve 1 through two first and second oil passages 22 and 23 formed in the cylinder head 1, respectively. The hydraulic control valve device C is selectively connected to a high-pressure oil passage (not shown) formed in the cylinder head 1 and a drain oil passage 24. The high-pressure oil passage communicates with a discharge port of an oil pump, which is a hydraulic pressure source, to supply hydraulic oil to an inlet port 44, which will be described later, of the hydraulic control valve device C, and the drain oil passage 24 opens into the valve train chamber 2. are doing.

On the other hand, a pair of drive rocker arms 26 and a pair of free rocker arms 27 which are swingably supported by the rocker shaft 25.
A valve operating characteristic changing mechanism on the exhaust valve side provided between the drive rocker arm 26 and the free rocker arm 27, a connecting piston capable of connecting the drive rocker arm 26 and the free rocker arm 27, Rocker arm
And a release piston for releasing the connection between the first and second hydraulic oil passages 18 and 19 in the same manner as the intake-side valve operation characteristic changing mechanism T. You.

During full-cylinder operation, the first working oil passage 18 is communicated with the high-pressure oil passage via the first oil passage 22 by a hydraulic control valve device C controlled according to the operation state of the vehicle. The hydraulic oil has a high oil pressure, while the second hydraulic oil passage 19 communicates with the drain oil passage 24 via the second oil passage 23, so that the hydraulic oil has a low oil pressure. As a result, the first and second hydraulic chambers 15,
The connecting piston 11 presses the connecting pin 12 and the releasing piston 13 due to the differential pressure of the hydraulic pressure of 16, the contact surface between the connecting piston 11 and the connecting pin 12 is positioned in the free rocker arm 10, and the connecting pin 12 is released. The drive rocker arms 8, 9 and the free rocker arm 10 are connected to each other with the contact surface with the piston 13 positioned in the drive rocker arm 9. by this,
The swing of the drive rocker arms 8, 9 is defined by the cam profile of the intake cam 4, and the intake valve is opened and closed at a predetermined opening / closing timing and a lift amount. Similarly, the exhaust valve is opened and closed at a predetermined opening / closing timing and a lift amount. Is opened and closed.

During the partial-cylinder deactivated operation, the first working oil passage 18 is connected to the drain oil passage 24 via the first oil passage 22 by the hydraulic control valve device C, so that the operating oil has a low oil pressure. On the other hand, the second working oil passage 19 is connected to the high-pressure oil passage via the second oil passage 23, and the working oil becomes high oil pressure. As a result, the first hydraulic chamber 15 has a low hydraulic pressure and the second hydraulic chamber 16 has a high hydraulic pressure, and is released from the state shown in FIG. 1 by a differential pressure between the first and second hydraulic chambers 15 and 16. The piston 13 presses the connection piston 11 and the connection pin 12, and the contact surface between the connection piston 11 and the connection pin 12 is located between the drive rocker arm 8 and the free rocker arm 10, and the connection pin 12 and the release piston 13 Is located between the drive rocker arm 9 and the free rocker arm 10, and the drive rocker arm 8 and the free rocker arm 10 and the drive rocker arm 9 and the free rocker arm 10 are disconnected. by this,
The swing of the drive rocker arms 8, 9 is defined by the cam profile of the idle cam 5, respectively, so that the intake valve is closed, and the exhaust valve is also closed, and the cylinder is idle. State.

Hereinafter, the structure of the hydraulic control valve device C will be described in detail with reference to FIGS. The hydraulic control valve device C is
First valve body 3 having mounting surface 31b to cylinder head 1
1 and a second valve body 32 having a planar coupling surface 32a aligned with a planar coupling surface 31a of the first valve body 31, and a spool hole formed in the first valve body 31. Spool 34 slidably fitted to 33 (see FIG. 5)
And a pilot pressure control valve 35 as a position control means attached to the second valve body 32, and the valve body 30 and the spool 34 constitute a spool valve. Here, the mounting surface 31b, which is the outer surface of the first valve body 31, and the two connecting surfaces 3
1a and 32a are parallel to each other. The pilot pressure control valve 35 is inserted into an insertion hole 36a of a mounting portion 36 formed in the second valve body 32, and is connected to the second valve body 32 via a bracket 37 fastened to the second valve body 32 with a bolt B1. Fixed.

Before the valve body 30 is attached to the cylinder head 1, the first valve body 31 and the second valve body 32
After being positioned by the two cylindrical knock pins 38 (see FIG. 6), they are integrally connected by one bolt B2 and temporarily assembled. After the valve body 30 has the cylindrical portion 31c protruding from the mounting surface 31b fitted into the insertion hole of the cam holder located at the end of the cylinder head 1 in the direction of the rotation axis L1 (see FIG. 1). As shown in FIG. 2, an insertion hole H1 formed coaxially between the hollow portion of the knock pin 38 and the first and second valve bodies 31 and 32, and the first and second valve bodies 31 and 32 It is fastened to the cylinder head 1 by bolts B3 (see FIG. 1) respectively inserted into two insertion holes H2 formed coaxially and one insertion hole H3 formed in the first valve body 31.

Referring to FIG. 1, FIG. 2, FIG. 4, and FIG. 6, when the valve body 30 is fastened to the cylinder head 1, the pilot pressure control valve 35 located above the valve body 30 has an insertion hole 36a. Is open upward including obliquely upward, and the bolt B1 is loosened upward, so that it can be detached from above the internal combustion engine. Further, with the valve body 30 fastened to the cylinder head 1, the end face of the cylindrical portion 31c abuts on the end face of the camshaft 3 to define the position of the camshaft 3 in the direction of the rotation axis L1. Therefore, the valve body 30 also serves as a positioning member for the camshaft 3.

As shown in FIGS. 5 and 8, a spool hole 33 formed in the first valve body 31 has one side surface (FIG. 2).
5 and 8, parallel to the first direction (corresponding to the left-right direction in FIG. 2. Hereinafter, unless otherwise specified, the left-right direction means the left-right direction in FIG. 2). Central axis
This is a bottomed hole made up of a circular hole having L2 (a circular cross section of the spool hole 33 is shown in FIG. 6). The drain port 40, the first outlet port 41, and the second outlet port 42, each having one end opening to the spool hole 33 and the other end opening to the mounting surface 31b, has openings 40a, 41a, 42a. Are formed sequentially from the left in the direction of the center axis L2 (hereinafter simply referred to as “axial direction A”), and are further provided on the mounting surface 31b around the openings 40a, 41a, and 42a. A groove D1 in which one O-ring R1 is mounted is formed. These ports 40, 41, and 42 are arranged in the first valve body 31 on a plane that includes the central axis L <b> 2 and is parallel to the mounting surface 31 b and is a second direction that is orthogonal to the first direction (that is, the axial direction A). In the direction (corresponding to the up-down direction in FIG. 2; hereinafter, unless otherwise specified, the up-down direction means the up-down direction in FIG. 2). Further, as shown in FIGS. 3, 6, and 7, the first valve body 31 extends parallel to a third direction orthogonal to the mounting surface 31b at the lower left position of the drain port 40, and 31b and the first valve body so as to open to the coupling surface 31a.
An introduction port 43 penetrating through 31 is formed, and
A groove D2 in which the O-ring R2 is mounted is formed around the opening 43a of the introduction port 43 in b.

When the valve body 30 is fastened to the cylinder head 1, the introduction port 43 is connected to the high-pressure oil passage, the first outlet port 41 is connected to the first oil passage 22, and the second outlet port 42 is connected to the second oil passage. The oil passage 23 and the drain port 40 communicate with the drain oil passage 24 at the mounting surface 31b.

Referring also to FIG. 3, the drain port 40
Inside, a semi-cylindrical protruding wall 45a which is a part of the peripheral wall 45 of the spool hole 33 and forms a part of a side wall of a hydraulic chamber described later.
From the wall surface 40b of the drain port 40 on the bottom surface 33a side (left side) of the spool hole 33 to the opening portion 33b side of the spool hole 33 (right side)
Extending toward the wall surface 40c. Further, referring also to FIG. 9, the second outlet port 42 is
A communication portion comprising a notch formed in the wall surface 42c on the opening 33b side (right side) of the spool hole 33 so as to open to the spool hole 33;
Has 46.

Referring to FIGS. 5, 7, and 8, the first valve body 31 has an elongated and elongated shape that opens to the coupling surface 31a.
In this embodiment, an L-shaped opening 44 bent at a substantially right angle is used.
an inlet port 44 consisting of a single groove having a is formed;
One end 44b of the inlet port 44, which is located on the downstream side of the flow of the hydraulic oil, has a first outlet port 41 and a second outlet port 42.
The other end 44c which is opened to the spool hole 33 and located at the upstream side of the flow of the hydraulic oil at the inlet port 44 is adjacent to the inlet port 43 via the partition wall 47. Therefore, in the first valve body 31, the introduction port
43 and the inlet port 44 are provided separately so as not to communicate with each other. In the spool hole 33, the inlet port 44 is located between the first outlet port 41 and the second outlet port 42 in the axial direction A, and when viewed from a direction orthogonal to the mounting surface 31b. And second outlet port 42
It is open at the position where it overlaps the O-ring R1 between them (see FIG. 5). The O-ring R1 between the first outlet port 41 and the second outlet port 42 has a “U” -shaped or “U” -shaped cross section that includes the central axis L2 and is orthogonal to the mounting surface 31b. And provided on the wall 31d having increased rigidity. The width of the wall 31d in the axial direction A is slightly larger than the width of the inlet port 44 in the axial direction A. The inlet port 44 is formed with an oil hole 48 that opens into the inner space of the cylindrical portion 31c. The hydraulic oil supplied through the oil hole 48 allows the journal of the cam shaft 3 that is supported by the cylinder head 1 to be journalled. And the contact surface between the cylindrical portion 31c and the camshaft 3 is lubricated.

On the other hand, referring to FIG. 10 and FIG.
The valve body 32 has a first communication passage 51 formed of a concave portion having an opening 51a that matches the shape of the opening 43b at the coupling surface 32a of the introduction port 43, and further has an opening at the coupling surface 32a. The second communication passage 52 is formed by a single elongated groove having an elongated and elongated shape that matches the shape of the opening 44a of the inlet port 44, in this embodiment an L-shaped opening 52a bent at a substantially right angle. , The first communication path 51 and the second communication path 52
In 52, adjacent to the end located on the upstream side of the flow of hydraulic oil, it communicates with the partition 47 by a third communication passage 53 formed of a hole formed in the partition 55 between the communication passages 51, 52 and facing the partition 47. Is done. Further, one O-ring R3 (FIG. 5) is provided around the openings 51a, 52a of the first and second communication passages 51, 52 at the coupling surface 32a.
(See FIG. 3) is formed. Further, FIG.
As shown in FIG. 11, the second valve body 32 has a fourth communication passage 51 that opens to the first communication passage 51 and communicates with the pilot pressure control valve 35.
A communication passage 54 is formed.

As shown in FIG. 6, a filter 56 is provided between the introduction port 43 and the first communication passage 51. The filter 56 has a mounting portion 56b formed by using a part of the O-ring R3 with the frustoconical body portion 56a housed in the introduction port 43, and the first valve body 31 and the second valve portion. The valve body is held between the coupling surfaces 31a and 32a with the body 32.
Incorporated within 30. Therefore, the hydraulic oil that has flowed into the introduction port 43 flows into the first communication passage 51 after foreign matter such as metal powder mixed in the hydraulic oil is removed by the filter 56, and further flows through the third communication passage 53. After flowing into the second communication path 52 through the second communication path 52, it reaches the inlet port 44.

Referring to FIG. 5, the spool 34 has a piston portion 34a formed at the distal end thereof, a plurality of lands, and a plurality of grooves including an annular groove. Piston part 34
a has a cylindrical shape having a diameter smaller than the diameter of the spool hole 33, and a small diameter portion 34a1 having a tip end surface capable of contacting the bottom surface 33a of the spool hole 33, and a cylindrical shape having a diameter larger than the small diameter portion 34a1. And a large-diameter portion 34a2 that comes into contact with the peripheral wall surface 49 of the peripheral wall 45 of the spool hole 33 including the protruding wall 45a all around. The piston portion 34a forms a hydraulic chamber 50 as a pressure chamber between the bottom surface 33a of the spool hole 33 and the peripheral wall surface 49 of the spool hole 33 including the inner peripheral surface of the protruding wall 45a, and supplies the hydraulic chamber 50 with the hydraulic chamber 50. The hydraulic pressure of the pilot hydraulic oil is controlled by a pilot pressure control valve 35 according to the engine operating state.

Then, as shown in FIG.
The first peripheral wall 49 located between the drain port 40 and the first outlet port 41 when the distal end surface of the piston portion 34a occupies the first position (the position shown in FIG. 5) in contact with the bottom surface 33a.
a first land 34b contacting the entire circumference with a, and a first exit port 41
And one end in the axial direction A is in contact with the third peripheral wall surface 49c between the inlet port 44 and the second outlet port 42 all around, and the other in the axial direction A. A third land 34d whose end is in contact with the fourth peripheral wall surface 49d of the spool hole 33 on the opening 33b side except for the communication portion 46 in the circumferential direction is provided. The first land 34b is located between the large diameter portion 34a2 and the first land 34b.
A first groove 34e and a second groove 34f between the second land 34c and the second land 34c and the third land 34d.
And a third groove 34g are respectively formed.

At the first position, the first land 34b contacts the first peripheral wall surface 49a with the second predetermined width W2 in the axial direction A,
The second land 34c is located between the first peripheral port 49 and the second peripheral wall 49b between the first outlet port 41 and the inlet port 44 in the axial direction A.
A gap having a first predetermined width W1 smaller than the predetermined width W2 is formed, and one end of the third land 34d contacts the third peripheral wall surface 49c with the second predetermined width W2 in the axial direction A. In addition, a communication portion 46 connects the other end of the third land 34d and the fourth peripheral wall surface 49d with each other.
A gap having a first predetermined width W1 in the axial direction A is formed in the outlet port 42.

Inside the spool 34, there is formed a bottomed communication port 57 composed of a circular hole coaxial with the central axis L2 and a radial hole. The communication port 57 has a large-diameter portion 57a located inside the third land 34d on the side of the opening that opens at the base end of the spool 34, and extends from the large-diameter portion 57a toward the bottom surface 33a. It comprises a small diameter portion 57b smaller in diameter than the portion 57a, and a plurality of, for example, four communication holes 57c formed of radial holes. The large-diameter portion 57a accommodates a return spring 59 mounted between an adjustable cap 58 for closing the opening 33b of the spool hole 33 and setting the maximum amount of movement of the spool 34 and the step of the communication port 57. A storage chamber is formed, and the return spring 59 is
The spool 34 is urged so that the front end surface of the spool 34 comes into contact with the bottom surface 33a.

Therefore, when the spool 34 occupies the first position, the first outlet port 41 communicates with the inlet port 44 via the third groove 34g to allow the hydraulic oil to flow therethrough.
The outlet port 42 communicates with the drain port 40 through the communication portion 46 and the communication port 57 to allow the flow of hydraulic oil, while the second outlet port 42 is shut off from the inlet port 44,
The flow of the hydraulic oil is shut off, the first outlet port 41 is shut off from the drain port 40, and the flow of the hydraulic oil is shut off.

When the hydraulic pressure of the pilot hydraulic oil in the hydraulic chamber 50 becomes high, the spool 34 moves rightward against the spring force of the return spring 59 and occupies the second position where it comes into contact with the cap 58. At this time, as shown in FIG. 12, the second outlet port 42 communicates with the inlet port 44 via the third groove 34g to allow the flow of hydraulic oil, and the first outlet port 41 is connected to the drain port 40. The first outlet port 41 communicates with the first groove 34e to allow the flow of hydraulic oil, while the first outlet port 41 is connected to the inlet port.
44, the flow of hydraulic oil is cut off, the second outlet port 42 is cut off from the drain port 40, and the flow of hydraulic oil is cut off.

In the second position, the first land 34b
Is a first predetermined width W1 in the axial direction A between itself and the first peripheral wall surface 49a.
The second land 34c is in contact with the second peripheral wall surface 49b at the second predetermined width W2 in the axial direction A, and one end of the third land 34d is in contact with the third peripheral wall surface 49c. A gap having a predetermined width W1 is formed, and the other end of the third land 34d is in contact with the fourth peripheral wall surface 49d at the second predetermined width W2 in the axial direction A at the communication portion 46.

The relationship between the position of the spool 34 and the opening and closing of the ports 40 to 42, 44 will be described with reference to FIGS. 5, 12, and 13. When the spool 34 moves from the first position to the second position, first, at the first intermediate position where the spool 34 has moved by the movement amount of the first predetermined width W1, the first outlet port 41 is shut off from the inlet port 44, Then, the second outlet port 42 is shut off from the drain port 40, the second outlet port 42 and the inlet port 44, and the first outlet port 41 and the drain port 40
Are maintained in the cutoff state. Then, the spool 34 is further displaced toward the second position, and has a second predetermined width.
Beyond the second intermediate position moved by the movement amount of W2, the first exit port 41 and the entrance port 44 and the second exit port
The second outlet port 42 is connected to the inlet port 44 by the third groove 34 while both the drain port 42 and the drain port 40 maintain the shut-off state.
g, the first outlet port 41 is connected to the drain port 40
Through the first groove 34e. Thus, between the first intermediate position and the second intermediate position, the first and second outlet ports 41 and 42 are blocked from the inlet port 44 and also blocked from the drain port 40. Also, the spool 34 is
Also when moving from the position to the first position, as is clear from FIG. 13, between the second intermediate position and the first intermediate position,
The first and second outlet ports 41 and 42 are shut off from the inlet port 44, and are also shut off from the drain port 40.

On the other hand, the hydraulic pressure in the hydraulic chamber 50 is controlled to control the spool.
The pilot pressure control valve 35, which controls the hydraulic pressure of the pilot hydraulic oil in order to control the position of the pilot fluid 34 in the axial direction A, is shown in FIG.
As shown in the figure, a valve body 60 driven by a solenoid
Inlet 61 and outlet 62, which are opened and closed by
A three-way solenoid valve having a control hole 64 selectively communicated with the inflow hole 61 and the discharge hole 62 corresponding to the position of the valve body 60 for opening and closing the valve.

The inflow hole 61 is communicated with the first communication passage 51 through the fourth communication passage 54, and the control hole 64 is formed in the second pilot passage 65 formed in the second valve body 32 and opening to the coupling surface 32a. The second pilot passage 65 is formed in the first valve body 31 and communicates with the first pilot passage 66 having one end opening to the coupling surface 31a and the other end opening to the hydraulic chamber 50 and the coupling surfaces 31a and 32a. Communicate. The discharge hole 62 communicates with a second discharge passage 67 formed in the second valve body 32 and opening to the coupling surface 32a. The second discharge passage 67 is formed in the first valve body 31 and has one end connected to the coupling surface.
The first discharge passage 68, which opens at 31a and the other end opens at the spool hole 33, communicates with the coupling surfaces 31a, 32a. The coupling surface 32a
Around the openings of the second pilot passage 65 and the second discharge passage 67 at which the O-ring R4 (see FIG. 5) is mounted.
D4 (see FIG. 10) is formed.

First pilot passage 66 and first discharge passage
8, the first pilot passage 66 is formed to extend linearly in parallel with the third direction, which is a direction orthogonal to the mounting surface 31b, and the first pilot passage 66 is located in the axial direction A more than the bottom surface 33a. The first discharge passage 68 is located near the large diameter portion 34a2,
It is located in the drain port 40 when viewed from 31b (see FIG. 3) and is always in communication with the drain port 40 via the first groove 34e. Further, the second pilot passage 65 and the second discharge passage 67 extend on the same straight line as the first pilot passage 66 and the first discharge passage 68, respectively.

The operation of the pilot pressure control valve 35 is controlled in accordance with the operating speed of the internal combustion engine or the like, and the valve body 60 closes the inflow hole 61 by the spring force of the return spring 69 in the demagnetized state. A normally closed valve that is closed, and in the excited state, the valve body 60 opens the inflow hole 61 and closes the flow control unit 63, thereby closing the discharge hole 62.
Is shut off from the control hole 64. Therefore, when the pilot pressure control valve 35 is in the demagnetized state, the pilot hydraulic oil in the hydraulic chamber 50 is supplied to the first and second pilot passages 66 and 65 and the control hole 6.
4. Flow control unit 63, discharge hole 62, second and first discharge passages 67, 6
Since the oil is discharged from the drain oil passage 24 through the drain port 8 and the drain port 40, the oil pressure in the hydraulic chamber 50 becomes low, and the spool 34 occupies the first position. When the pilot pressure control valve 35 is in the excited state, a part of the hydraulic oil in the first communication passage 51 is used as the pilot hydraulic oil and the fourth communication passage 54, the inflow hole 61, the control hole
64 and the hydraulic chamber through the second and first pilot passages 65 and 66.
As a result, the hydraulic pressure in the hydraulic chamber 50 becomes high, and the spool 34 occupies the second position.

The pilot pressure control valve 35 has a valve body
As shown in FIG. 6, the insertion hole of the second valve body 32 is oriented so that the operation axis L3, which is the direction of movement of 60, points in the vertical direction.
Inserted into 36a and attached. Therefore, the pilot pressure control valve 35 is mounted at a position where its operating axis L3 is substantially located on a plane orthogonal to the axial direction A, and when viewed from a direction orthogonal to the axial direction A, overlaps the spool hole 33. As shown in FIG. 3, the entirety is prevented from protruding in the axial direction A from the first valve body 31.

Next, the operation and effect of the embodiment configured as described above will be described. Referring to FIGS. 1 and 5, when the spool 34 of the hydraulic control valve device C occupies the first position, the high-pressure hydraulic oil that has flowed into the inlet port 44 from the inlet port 43 flows from the first outlet port 41 to the first oil. Road 22 and 1st
The first hydraulic chamber 15 is supplied to the first hydraulic chamber 15 via the hydraulic oil passage 18 and the first hydraulic chamber 15 becomes high in oil pressure. On the other hand, the second outlet port 42 communicates with the drain port 40 through the communication port 57, 2
The hydraulic oil in the hydraulic chamber 16 is discharged from the drain port 40 through the second hydraulic oil passage 19, the second oil passage 23, the second outlet port 42, and the communication port 57 to the valve operating chamber 2 through the drain oil passage 24. As a result, the second hydraulic chamber 16 has a low hydraulic pressure. As a result, the internal combustion engine is operated in all cylinders as described above.

Referring to FIGS. 1 and 12, when the spool 34 of the hydraulic control valve device C occupies the second position, the first outlet port 41 communicates with the drain port 40.
Hydraulic oil in the hydraulic chamber 15 flows from the drain port 40 through the first hydraulic oil passage 18, the first hydraulic passage 22, and the first outlet port 41 to the drain hydraulic passage 24.
The first hydraulic chamber 15 is discharged to the low pressure in the valve operating chamber 2 while passing through the inlet port 43, and the high-pressure hydraulic oil flowing into the inlet port 44 from the second outlet port 42 23 and is supplied to the second hydraulic chamber 16 through the second hydraulic oil passage 19,
The second hydraulic chamber 16 becomes high in hydraulic pressure. As a result, as described above, some of the cylinders of the internal combustion engine are stopped, and the internal combustion engine is operated in a partial cylinder stop mode.

As described above, the first and second outlet ports 41, 42
In the hydraulic control valve device C having a position, at the first position of the spool 34 whose position is controlled by the pilot pressure control valve 35, the second outlet port 42 is connected to the drain port 40 through a communication port 57 inside the spool 34. In the second position of the spool 34, the first outlet port 41 is connected to the drain port 40, so that the drain port 40 can be shared by the first and second outlet ports 41 and 42, and the pilot pressure control valve
35 is attached to the second valve body 32 coupled to the first valve body 31 at a coupling surface 32a parallel to the axial direction A of the spool hole 33, so that the hydraulic control valve device C is downsized in the axial direction A. In addition, since the opening 44a of the inlet port 44 opens on the connecting surface 31a of the first valve body 31 with the second valve body 32,
In the mounting surface 31b of the first valve body 31, there is no need to open the inlet port 44 along the first and second outlet ports 41 and 42 and the drain port 40 in the axial direction A. As a result, in the spool hole 33, the inlet port 44 is located between the first outlet port 41 and the second outlet port 42 in the axial direction A, and when viewed from the mounting surface 31b, the first outlet port 41 and the second Since the first valve body 31 is formed so as to be opened at a position overlapping the O-ring R1 between the outlet ports 42, the first and second openings 41a, 42a and 40a in the mounting surface 31b are of course formed.
Of the outlet ports 41, 42 and the drain port 40, the mutually adjacent ports 41, 42; 40, 41 can also be arranged close to each other in the axial direction A, so that the first valve body 31,
Consequently, the hydraulic control valve device C is downsized in the axial direction A. Further, since the O-ring R1 between the first outlet port 41 and the second outlet port 42 is provided on the highly rigid wall portion 31d, sufficient sealing performance can be obtained by increasing the sealing pressure corresponding to the rigidity. In addition, since the width of the wall portion 31d in the axial direction A is slightly large, a sufficient area for the O-ring can be secured to provide a sealing surface, and the cylinder of the hydraulic control valve device C can be provided. Even if the O-ring is deformed at the time of assembling to the head 1, sufficient sealing performance can be ensured.

The inlet port 44 and the inlet port 43 opening to the connecting surface 31a are connected to each other by the bolt B2 after the hydraulic control valve device C is positioned by the knock pin 38, and are temporarily assembled. O-ring when connecting 32
Since the inlet port 44 is sealed by the mounting surface 31b
When the hydraulic control valve device C is mounted on the cylinder head 1, the first and second
Outlet ports 41 and 42, drain port 40 and introduction port 43
The hydraulic control valve device C only needs to be attached so that the seal is reliably performed on the mounting surface 31b where the opening is opened, so that the hydraulic control valve device C can be easily attached to the cylinder head 1. Further, since the hydraulic control valve device C is temporarily assembled and then attached to the cylinder head 1, it is easy to assemble the hydraulic control valve device C to the cylinder head 1.

The inlet port 44 is formed by a single groove having an elongated and elongated opening 44a opened to the coupling surface 31a.
33 and the first to third communication passages 51 to 53 which are formed in the second valve body 32 and communicate with the pilot pressure control valve 35. The shape of the first to third communication passages 51 to 53 formed in the 32 can be simplified, the processing of the first to third communication passages 51 to 53 becomes easy, and the first to third communication passages 51 to 53 become easier. The pressure loss in the communication passages 51 to 53 can be reduced, and the responsiveness of the movement of the spool 34 can be improved. Furthermore, since the inlet port 44 is formed from a groove, the degree of freedom of the position at which the inlet port 43 is formed increases.

Further, in the passage of the hydraulic oil from the introduction port 43 to the inlet port 44, a first communication passage 51 communicating with the pilot pressure control valve 35 is formed at a position upstream of the hydraulic oil,
At a position downstream of that, the inlet port 44 is
The spool 34 moves to the inlet port
When the switch 44 switches from the first outlet port 41 to the second outlet port 42, the influence of the pressure fluctuation in the first communication passage 51 due to the switching is reduced, and the hydraulic oil in the first communication passage 51 is reduced. The hydraulic pressure in the hydraulic chamber 50 supplied as pilot hydraulic oil is stabilized, and the spool 34 can maintain the second position stably. The spool 34 moves the inlet port 44 from the first outlet port 41 to the second outlet port 42. The operation for switching is stabilized.

The pilot pressure control valve 35 has its operating axis L3
Are on a plane perpendicular to the axial direction A, and the axial direction A
The hydraulic control valve device C is reduced in size in the axial direction A by the amount of the overlap, and the entire hydraulic control valve device C is entirely mounted on the first valve body 31. Is prevented from protruding in the axial direction A, so that the hydraulic control valve device C is further downsized in the axial direction A.

When the hydraulic control valve device C is attached to the cylinder head 1 of the internal combustion engine, the valve body 30
The pilot pressure control valve 35 located at the top of the
Is open upward, including obliquely upward, and the bolt B1 is loosened upward, so that the pilot pressure control valve 35 can be detachably attached to the second valve body from above.
Since the pilot pressure control valve 35 is attached to the internal combustion engine, it is easy to remove and attach the pilot pressure control valve 35 to the internal combustion engine.
The maintainability of the hydraulic control valve device C is improved.

An introduction port 43 formed in the first valve body 31
And the inlet port 44 are separated by a partition wall 47, and the introduction port 43 is connected to the first to third communication passages formed in the second valve body 32.
By communicating with the inlet port 44 via 51 to 53, the filter 56 can be easily fixed using the coupling surfaces 31a, 32a of the first and second valve bodies 31, 32. The main body of the filter 56 is housed in the introduction port 43 of the first valve body 31, and the mounting portion 56b is held between the coupling surfaces 31a and 32a between the first valve body 31 and the second valve body 32. When the valve body 30 is mounted on the cylinder head 1, the filter 56 does not fall off or is deformed by hitting another member.
The ease of assembly of the hydraulic control valve device C having the filter 56 is improved.

The first valve body 31 and the second valve body 32
After being positioned by the dowel pins 38 and being connected by one bolt B2, the connection is easy,
In addition, by using the hollow portion of the knock pin 38 as an insertion hole H1 of a bolt B3 for fixing the valve body 30 to the cylinder head 1, further fastening of the first and second valve bodies 31 and 32 and the valve body 30 Are mounted on the cylinder head 1 at the same time and with the same bolt B3, so that the assemblability is improved and the number of parts is reduced.

Between the first intermediate position and the second intermediate position of the spool 34, the inlet port 44 is cut off from the first outlet port 41 and the second outlet port 42, and the inlet port 44 and the two outlet ports 41, 42 are closed. Since the hydraulic oil is not circulated between the ports 40 and 42 and 44 and the spool 34, high-cost processing for realizing high dimensional accuracy of the ports is not required, and relatively low The switching between the first outlet port 41 and the second outlet port 42 is reliably performed at a low cost, and immediately after the switching, the first and second outlet ports 41, 42 are provided.
Of the ports, one port communicating with the inlet port 44 immediately becomes high oil pressure, and the other port communicating with the drain port 40 immediately becomes low oil pressure. The quickness of changing the valve operating characteristics of the changing mechanism T is improved.

[0061] First and second pilot passages 66 and 65, which are passages for supplying and discharging pilot hydraulic oil to and from the hydraulic chamber 50,
Since the first and second discharge passages 68 and 67 are formed to extend linearly in parallel with a direction orthogonal to the mounting surface 31b, the pilot pressure control valve 35 and the hydraulic chamber 50 are connected at the shortest distance. The response of the spool 34 is improved. Furthermore, since the first pilot passage 66 that opens to the hydraulic chamber 50 extends linearly from the hydraulic chamber 50 in a direction orthogonal to the axial direction A,
The valve body 31 is downsized in the axial direction A.

In the drain port 40, a semi-cylindrical projecting wall 45 a forming the hydraulic chamber 50 is provided with the hydraulic chamber 5 of the drain port 40.
The hydraulic chamber 50 and the drain port 40 are disposed so as to overlap with each other when viewed from a direction orthogonal to the axial direction A because the hydraulic chamber 50 and the drain port 40 extend from the 0-side wall surface 40b toward the wall surface 40c on the opposite side in the axial direction A. The first valve body 31 in which the chamber 50 is formed is reduced in the axial direction A.

Hereinafter, an embodiment in which a part of the configuration of the above-described embodiment is changed will be described with respect to the changed configuration.
The valve operating characteristic changing mechanism T is for stopping the intake valve and the exhaust valve in the above embodiment. However, in the mechanism for constantly opening and closing the intake valve or the exhaust valve, the lift amount, the operating angle or the cam phase is controlled by the engine operation. It may be changed according to the state.

Although the spool valve device is used as the hydraulic control valve device C of the valve train V in the above embodiment, it can be used for other hydraulic control devices or fluid pressure control devices of the internal combustion engine. Further, it can be used for a hydraulic control device or a fluid pressure control device of a machine other than the internal combustion engine.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a hydraulic valve operating characteristic changing mechanism provided in a valve operating device of a multi-cylinder internal combustion engine in which a spool valve device according to the present invention is used as a hydraulic control valve device.

FIG. 2 is a front view of the hydraulic control valve device.

FIG. 3 is a rear view of the hydraulic control valve device.

FIG. 4 is a view taken in the direction of the arrow IV in FIG. 3;

FIG. 5 is a cross-sectional view taken along line Va-Va and partly line Vb-Vb of FIG. 2 when the spool is at a first position.

6 is a VIa-VIa line in FIG. 2 and a part VI in FIG. 3;
It is sectional drawing in the b-VIb line.

FIG. 7 is a view taken along the line VII-VII in FIG. 4;

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is a sectional view taken along line IX-IX of FIG. 3;

FIG. 10 is a view taken in the direction of arrows XX in FIG. 4;

11 is a sectional view taken along line XI-XI in FIG.

FIG. 12 is a view similar to FIG. 5, with the spool in the second position.

FIG. 13 is a diagram illustrating the relationship between the position of the spool and the opening and closing of each port.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cylinder head, 2 ... Valve chamber, 3 ... Cam shaft, 4,
5, 6 cam, 7 rocker shaft, 8, 9 drive rocker arm, 10 free rocker arm, 11 connection piston, 12 connection pin, 13 release piston, 14 return spring, 15, 16 hydraulic chamber, 17 ... pipe, 18, 19 ... working oil passage, 20, 21 ... communication passage, 22, 23 ... oil passage, 24 ... drain oil passage, 25 ... rocker shaft, 30
... valve body, 31 ... first valve body, 31a ... connecting surface, 31b ... mounting surface, 32 ... second valve body, 32a ... connecting surface, 33 ... spool hole, 34 ... spool, 35 ... pilot pressure control valve, 36 ... Mounting part, 37 ... Bracket, 38 ... Dowel pin, 40 ... Drain port, 41 ... First outlet port, 42 ... Second outlet port, 43 ... Introduction port, 44 ... Inlet port, 44a ... Opening, 45 ... Peripheral wall, Four
6 ... communication part, 47 ... partition, 48 ... oil hole, 49 ... peripheral wall surface, 50 ... hydraulic chamber, 51-54 ... communication passage, 55 ... partition, 56 ... filter, 57 ...
Communication port, 58… Cap, 59… Return spring, 60… Valve,
61 ... inflow hole, 62 ... discharge hole, 63 ... flow control part, 64 ... control hole, 65, 66 ... pilot passage, 67, 68 ... discharge passage, 69 ...
Return spring, V: valve operating device, L1: rotary axis, L2: central axis, L3: operating axis, T: valve operating characteristic changing mechanism, C: hydraulic control valve device, B1 to B3: bolt, H1 to H3: insertion Hole, A: axial direction, R1 to R4: O-ring, D1 to D4: groove, W1, W2: width.

Continued on front page F-term (reference) 3G018 AB03 BA13 CA19 DA19 DA52 DA56 DA58 DA60 FA12 GA03 GA14 GA17 3H051 AA03 BB02 BB10 CC11 FF07 3H089 AA60 DA02 DB45 DB48 DB75 DB79 GG02 JJ12

Claims (4)

[Claims] A first valve body in which a spool hole in which a spool is slidably fitted is formed, and an inlet port, an outlet port, and a drain port each having one end opened in the spool hole are formed; A second valve body to which a position control means for controlling the position of the spool is attached; and a valve body configured to be coupled by a coupling surface parallel to an axial direction of the spool hole, and A spool valve device for shutting off and circulating fluid between the inlet port and the outlet port and between the drain port and the outlet port, wherein the outlet port is a first outlet port and a second outlet port And the other end of the inlet port opens to the coupling surface, and the other end of the first outlet port, the second outlet port, and the drain port is connected to the coupling surface. An opening is formed on an outer surface of the first valve body, and a communication port is formed inside the spool. When the spool occupies a first position, the first outlet port is shut off from the drain port and The second outlet port is communicated with an inlet port, the second outlet port is shut off from the inlet port, and the second outlet port is communicated with the drain port through the communication port. When the spool occupies a second position, the first outlet port is The spool valve device is shut off from an inlet port and communicates with the drain port, and the second outlet port is communicated with the inlet port and is shut off from the communication port. 2. The position control means is a pilot pressure control valve for controlling a pressure of a pilot fluid acting on the spool, wherein the inlet port is formed by a groove opening in the coupling surface, and the inlet port has The spool valve device according to claim 1, wherein a communication passage formed in the second valve body and communicating with the pilot pressure control valve is communicated. 3. The pilot pressure control valve has a substantially operating axis on a plane orthogonal to the axial direction, and is mounted at a position overlapping the spool hole when viewed from a direction orthogonal to the axial direction. 3. The spool valve device according to claim 2, wherein the pilot pressure control valve is detachably mounted from above while the spool valve device is mounted on a device. 4. The spool valve device according to claim 1, wherein said spool valve device is mounted on a device at a mounting surface thereof, and said outer surface of said first valve body is said mounting surface.
The spool valve device according to any one of the preceding claims.