JP2006316640A - Oil control valve installation body, resin member, cylinder head cover for internal combustion engine and cylinder head cover mounting structure for internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent burr from entering through a working oil supply hole when OCV installation body is insert-molded in a resin member of a cylinder head cover of an internal combustion engine. <P>SOLUTION: The OCV installation body abuts on a burr cut surface of a mold on a burr cut surface 12 existing in a circumference surface of a working fluid supply connection part 12, and prevents entering of melted resin. Consequently, melted resin does not reach a tip surface of a working oil supply connection part 12 even if the same enters a mating surface with the burr cut surface of the mold. Consequently, entering of burr through oil holes 18, 22, 24 opening to the tip surface can be prevented. Consequently, peeling off of burr itself does not occur, and operation trouble due to peeling off burr sucked in a variable valve mechanism 26 or the OCV 4 together with working oil is not caused. Also, since burr cutting is not done, machining man hour does not increase and part of burr shaved at a time of burr cutting does not enter through the oil holes 18, 22, 24. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an oil control valve mounting body capable of mounting an oil control valve that controls supply and discharge of hydraulic pressure to a variable valve mechanism of an internal combustion engine, a resin member integrated with the oil control valve mounting body, and a cylinder head cover And its mounting structure.

  When an oil control valve for controlling hydraulic pressure supply / discharge to the variable valve mechanism of an internal combustion engine is installed on the cylinder head side, the oil control valve is installed in the cylinder from the viewpoint of attaching / detaching the oil control valve and facilitating the supply of hydraulic oil. There is a case where it is attached to the head cover (for example, see Patent Document 1).

Japanese Patent No. 3525709 (page 4-6, FIGS. 1 and 3)

In such a technique of Patent Document 1, a configuration in which a control valve is mounted in a valve case attached to a cylinder head cover is employed.
However, when a resin cylinder head cover is used for the configuration of Patent Document 1 from the viewpoints of weight reduction and noise, the resin cylinder head cover has a relatively low rigidity. The head cover is easily deformed. For this reason, it is conceivable to insert an oil control valve mounting body made of a material having higher rigidity than the resin, specifically, a sleeve made of a metal material into the resin by insert molding.

  By forming an oil hole connected to the port of the oil control valve in the metal sleeve, the deformation of the resin cylinder head cover can be prevented from affecting the connecting portion between the port of the oil control valve and the oil hole.

  By the way, when the sleeve is insert-molded as described above, there is a possibility that the molten resin may enter the oil hole, particularly the opening of the hydraulic oil supply oil hole, in the outer peripheral surface of the sleeve during insert molding. In order to prevent the molten resin from penetrating, the inner surface of the opening and the surface adjacent to the opening must be used as a burr cutting surface during insert molding.

  However, if the burr cutting surface is the hydraulic oil supply oil hole itself or adjacent to the hydraulic oil supply oil hole in this way, in practice, the burr is likely to be formed in a state of entering the hydraulic oil supply oil hole. Become. If this burr is left unattended, the peeled burr may be sucked into the variable valve mechanism or the oil control valve together with the working oil, causing a problem in operation.

  For this reason, it is necessary to remove burrs formed in the hydraulic oil supply oil holes or adjacent to the hydraulic oil supply oil holes by burr cutting after insert molding. However, even if burring is performed to increase the number of processing steps, some of the burrs cut during the burring process may enter the hydraulic oil supply holes, which also hinders operation. May cause it.

  The present invention relates to an oil control valve mounting body capable of preventing entry of burrs into a hydraulic oil supply oil hole even when insert molding is performed on a resin member, a resin member using the same, a cylinder head cover of an internal combustion engine, and a mounting structure thereof It is intended to provide.

In the following, means for achieving the above object and its effects are described.
The oil control valve mounting body according to claim 1 is integrated with the resin member constituting a part or the whole of the cylinder head cover of the internal combustion engine by insert molding when the resin member is molded. An oil control valve mounting body that allows an oil control valve for controlling supply and discharge of operating hydraulic pressure to a variable valve mechanism of an internal combustion engine to be mounted on the cylinder head cover, communicated with the mounting hole for the oil control valve and the mounting hole A sleeve having a plurality of oil holes to be protruded from an outer peripheral surface of the sleeve at a position of at least a hydraulic oil supply oil hole serving as a hydraulic oil supply passage to the variable valve mechanism among the plurality of oil holes. A tip end surface that is in contact with the cylinder head side, and the hydraulic oil supply oil hole is extended to the tip end surface and opened. A hydraulic oil supply connecting portion capable of connecting the hydraulic oil supply oil hole to an oil passage on a cylinder head side, and the sleeve is disposed on an outer periphery of the hydraulic oil supply connecting portion rather than the tip end surface. A burr cutting surface is formed on the side close to the surface.

  As described above, the connecting portion for supplying hydraulic oil projects from the outer peripheral surface of the sleeve. A burr cutting surface is formed on the outer periphery of the hydraulic oil supply connecting portion on the side closer to the sleeve than the tip surface. For this reason, the burr cutting surface exists at a position away from the tip end surface where the opening of the hydraulic oil supply oil hole exists to the sleeve side. This burr cutting surface comes into contact with the burr cutting surface on the mold side to become a mating surface, but this mating surface is separated from the tip surface, so that when the resin component is insert-molded, molten resin is applied to the mating surface. Even if it penetrates, it will not reach the tip. For this reason, it is possible to prevent the entry of burrs into the hydraulic oil supply oil hole that opens to the front end surface.

In this way, entry of burrs into the hydraulic oil supply oil hole formed in the oil control valve mounting body integrated with the resin member by insert molding can be prevented.
The oil control valve mounting body according to claim 2, wherein the sleeve and the connection portion for supplying hydraulic oil are integrally formed of a material having higher rigidity than the resin forming the resin member. It is characterized by being formed.

  The sleeve and the connecting portion for supplying hydraulic oil are integrally formed of a material higher in rigidity than the resin integrated in this way, thereby preventing deformation of the oil control valve mounting hole inside the sleeve. . As a result, the oil control valve can be easily mounted, and high oil tightness can be maintained when the oil control valve is mounted. The hydraulic oil supply connection part can also be prevented from being deformed as a whole, and the tip surface for contact with the cylinder head can be prevented from deforming. Sex can be maintained.

An oil control valve mounting body according to a third aspect is characterized in that, in the second aspect, the high-rigidity material is a metal.
In particular, as a material having higher rigidity than a resin member, a metal can be cited, and the actions and effects described in claim 2 are remarkable.

  The resin member according to claim 4 is a resin member constituting a part or the whole of the cylinder head cover of the internal combustion engine, and the burr of the oil control valve mounting body according to any one of claims 1 to 3. It is characterized by being integrated by insert molding in a state in which the burr cut surface on the mold side is in contact with the cut surface.

  As described above, when the burr cutting surfaces are brought into contact with each other at the time of insert molding, even if the intrusion of the molten resin occurs in the contacted surface, the intrusion stops at the contact portion, and the hydraulic oil It does not enter the supply oil hole.

In this way, entry of burrs into the hydraulic oil supply oil hole formed in the oil control valve mounting body integrated with the resin member by insert molding can be prevented.
The resin member according to claim 5, wherein the resin part is formed by insert molding so as to cover the burr cut surface on the oil control valve mounting body side integrated with the resin member in claim 4. And a retainer that reinforces the joined state between the oil control valve mounting body and the resin portion.

  In this way, the retainer can reinforce the joined state between the oil control valve mounting body and the resin member, and the oil control valve mounting body and the resin member can be more firmly integrated.

  The resin member according to claim 6 is the resin member according to claim 5, wherein the retainer is joined to the burr cutting surface on the oil control valve mounting body side together with the resin portion formed by the insert molding. It is characterized by that.

  In this way, the joined state between the oil control valve mounting body and the resin member can be further reinforced by further joining the retainer to the burr cutting surface on the oil control valve mounting body side.

  According to a seventh aspect of the present invention, in the oil control valve mounting body according to the third aspect, a bolt fastening region in which a bolt through hole is formed in a direction perpendicular to the tip end surface is provided in a part of the connection portion for supplying hydraulic oil. It is characterized by being.

  Thus, by providing a bolt fastening region in the connecting portion for supplying hydraulic oil in the oil control valve mounting body and forming a bolt through hole, the oil control valve mounting body can be directly connected without using a resin member. Bolts can be fastened to the cylinder head side. For this reason, the front end surface of the connecting portion for supplying hydraulic oil can be firmly pressed to the cylinder head side, and the oil hole for supplying hydraulic oil can be connected to the oil passage on the cylinder head side with high oil tightness. become.

  The resin member according to claim 8 is a resin member constituting a part or the whole of the cylinder head cover of the internal combustion engine, and a molding die is formed on the burr cutting surface of the oil control valve mounting body according to claim 7. The burr cutting surface on the side is brought into contact, and one end of the bolt through hole in the bolt fastening region is integrated with insert molding in a state where the other end is released to the outside.

  For the oil control valve mounting body in which the bolt fastening region is provided in the connection portion for supplying hydraulic oil, insert molding is performed in a state where one end of the bolt through hole is opened to the outside and the other end is opened to the inside, and the resin member is integrated.

  As a result, the intrusion of the resin can be stopped at the mating surface portion due to the contact between the burr cutting surfaces to prevent the entry of the burr into the hydraulic oil supply oil hole, and the bolt through hole can be inserted from the outside into the bolt through hole. So that the resin member can be firmly bolted to the oil control valve mounting body.

The cylinder head cover of the internal combustion engine according to claim 9 is characterized in that the resin member according to claim 8 is partially or entirely made up.
By using this cylinder head cover, it is possible to prevent the entry of burrs into the hydraulic oil supply oil hole formed in the oil control valve mounting body, and the cylinder head cover on the cylinder head side at the oil control valve mounting body portion. The bolt can be tightened firmly.

  The cylinder head cover mounting structure for an internal combustion engine according to claim 10 is the cylinder head cover mounting structure according to claim 9 for the cylinder head of the internal combustion engine, wherein the oil passage supplies hydraulic oil to the variable valve mechanism. The oil control valve mounting body integrated with the resin member of the cylinder head cover of the internal combustion engine according to claim 9 on a fixed surface on the cylinder head side where the bolt screw hole is opened. The front end surface is abutted, and the bolt inserted from the outside into the bolt through hole in the bolt fastening region is screwed into a bolt screw hole formed in the fixed surface on the cylinder head side to be bolted. It is characterized by being.

  By fastening the cylinder head cover and the cylinder head side with bolts in this way, the cylinder head cover can be firmly fixed to the cylinder head side with high oil tightness without entering the burr into the hydraulic oil supply oil hole.

[Embodiment 1]
FIG. 1 shows a part of a cylinder head H of an internal combustion engine to which the above-described invention is applied, and a longitudinal section showing the periphery of a mounting portion 6 of an oil control valve (hereinafter referred to as “OCV”) 4 in a resin cylinder head cover 2. FIG. FIG. 1 shows a state before the OCV 4 is mounted and the OCV 4 is separated from the mounting site 6. FIG. 2 is a longitudinal sectional view of the OCV 4 mounted.

  Here, the cylinder head cover 2 is integrally formed of resin. When the cylinder head cover 2 is integrally molded, an oil control valve mounting body (hereinafter referred to as “OCV mounting body”) 8 disposed in the mold is covered with resin by insert molding, so that a portion of the mounting portion 6 is formed. It is integrated with.

  The OCV mounting body 8 is shown in FIGS. 3 is a perspective view, FIG. 4A is a front view, FIG. 4B is a left side view, FIG. 3C is a right side view, and FIG. The OCV mounting body 8 is composed of a sleeve 10 and a hydraulic oil supply connection portion 12, and is made of metal, here, a material having the same thermal expansion coefficient as that of the spool housing 4a of the OCV 4 shown in FIGS. Is integrally formed of an aluminum alloy. The spool housing 4a of the OCV 4 may be made of the same metal material.

  The sleeve 10 has a cylindrical shape and opens into the mounting hole 14 at positions corresponding to the five ports P1, P2, P3, P4, and P5 provided on the spool housing 4a of the OCV 4, and extends outward from the mounting hole 14. Penetrating oil holes 16, 18, 20, 22, and 24 are formed. In the longitudinal sectional views of FIGS. 1 and 2, the opening portions of the three oil holes 16, 18, and 20 in the mounting hole 14 are on the near side that has been cut, and therefore, in FIGS. Show.

  Among the oil holes 16 to 24, the three oil holes 18, 22, and 24 corresponding to the three ports P2, P4, and P5 project from the outer peripheral surface of the sleeve 10 at the oil hole 18, 22, and 24 portions. The inside of the connecting portion 12 for supplying hydraulic fluid is formed so as to do so. As a result, the oil holes 18, 22, 24 are extended to open to the front end surface 12 a of the hydraulic oil supply connection portion 12.

  Further, the oil holes 16 and 20 are also extended by penetrating the inside of the connecting portion 12 for supplying hydraulic oil. However, the oil holes 16 and 20 are opened to the burr cutting surface 12b at a position closer to the sleeve 10 side than the front end surface 12a. ing.

  Note that an O-ring groove 12c including three ring grooves is formed on the distal end surface 12a so as to surround the openings of the oil holes 18, 22, and 24. An O-ring 25 having a shape as shown in FIG. 5 is accommodated in the O-ring groove 12c.

  Among these oil holes 16 to 24, the oil hole 18 is a hydraulic oil supply oil hole that is supplied with high-pressure hydraulic oil from the hydraulic pump P via an oil passage on the cylinder head side. The oil holes 22 and 24 are selectively supplied with the high-pressure hydraulic oil from the oil hole 18 through the OCV 4, and are supplied to the advance chamber or the retard chamber in the variable valve mechanism 26 shown in FIGS. This is an oil hole for supplying hydraulic fluid. When one of the oil holes 22 and 24 supplies high-pressure hydraulic oil to the variable valve mechanism 26 side, the other is used as a path for discharging the hydraulic oil from the variable valve mechanism 26 side.

  The oil holes 16 and 20 are configured such that when any of the oil holes 22 and 24 discharges the hydraulic oil from the variable valve mechanism 26 side, the hydraulic oil discharged via the OCV 4 is directly applied to the internal space of the cylinder head cover 2. This is a hydraulic oil discharge oil hole to be discharged.

  As shown in FIGS. 1 and 2, when the cylinder head cover 2 is attached to the cylinder head H, the OCV mounting body 8 integrated with the cylinder head cover 2 has a tip surface 12 a of the hydraulic oil connection portion 12. Then, it comes into contact with a contact surface 28a provided on the upper surface of the cam cap 28 corresponding to the fixed surface. As a result, the hydraulic oil supply oil holes 22 and 24 to the variable valve mechanism 26 in the hydraulic oil supply connection portion 12 are connected to the cam cap oil passages 30 and 32 that open to the contact surface 28 a of the cam cap 28. Is done. The cam cap oil passages 30 and 32 are respectively connected to camshaft oil passages 34 a and 34 b formed in the camshaft 34 in the axial direction, and the advance angle of the variable valve mechanism 26 provided at the tip of the camshaft 34. Connected to the chamber and the retarded chamber, respectively.

  The other hydraulic oil supply oil hole 18 is formed in the cylinder head H and the cam cap 28 as shown by a two-dot chain line in FIGS. It is connected to an oil passage 36 for supplying high pressure hydraulic oil. As a result, the high-pressure hydraulic oil is selectively supplied from the hydraulic pump P to the hydraulic oil supply oil holes 22 and 24 through the supply oil passage 36, the oil hole 18, and the OCV 4.

  Since the burr cutting surface 12b is lifted from the contact surface 28a of the cam cap 28, any oil for supplying hydraulic oil is opened from the openings of the oil holes 16 and 20, which are dedicated oil discharge holes. The hydraulic oil discharged from the holes 22 and 24 through the OCV 4 can be discharged directly into the cylinder head cover 2.

  The OCV mounting body 8 described above is integrated by insert molding at the time of injection molding of the resin cylinder head cover main body 2a that occupies most or all of the cylinder head cover 2, so that the cylinder head cover 2 as shown in FIGS. Incorporated as part.

  In insert molding, an epoxy resin adhesive is previously applied to the outer peripheral surface of the sleeve 10 shown in FIGS. 3 and 4 and the outer peripheral surface of the hydraulic oil supply connecting portion 12 excluding the region from the tip surface 12a to the burr cutting surface 12b. The agent is applied as a primer. Then, for example, insert molding is performed as shown in FIGS.

  That is, of the molds 40, 42, 44, and 46 as the molds, the OCV is formed by inserting the cylindrical protrusion 42a of the second mold 42 into the mounting hole 14 of the sleeve 10 as shown in FIG. The mounting body 8 is disposed in the first mold 40. Next, as shown in FIG. 6 (B), the cylindrical protrusion 44a of the third mold 44 is inserted into the mounting hole 14 of the sleeve 10 from the side opposite to the second mold 42, so that the OCV mounting body 8 is It is supported by two molds 42 and 44. Then, as shown in FIG. 6C, the fourth mold 46 is arranged from above so that the hydraulic oil supply connecting portion 12 is inserted into the recess 46a. At this time, the burr cutting surface 46b formed around the inner surface of the concave portion 46a of the fourth mold 46 is brought into contact with and pressed against almost the whole burr cutting surface 12b on the hydraulic oil supply connecting portion 12 side. It becomes a mating surface for.

  In the state of FIG. 6C in which the OCV mounting body 8 is arranged in the molds 40 to 46 in this way, the cavity 50 formed between the molds 40 to 46 is melted from the injection molding machine. Resin M is injected as shown in FIG. Then, after resin M hardens | cures by a chemical reaction, metal mold | dies 40-46 are isolate | separated and the integrated object of resin M and OCV mounting body 8 is taken out. Thus, the resin M becomes the resin cylinder head cover main body 2a, and the cylinder head cover 2 in which the OCV mounting body 8 shown in FIG. 1 is integrated is completed.

  Since the OCV mounting body 8 is insert-molded in this way, the OCV 4 can be easily mounted on the cylinder head cover 2, and the variable valve mechanism 26 can be driven to change the valve timing of the intake valve or the exhaust valve. Become.

In the configuration described above, the relationship with the claims is that the resin cylinder head cover body 2a corresponds to a resin member.
According to the first embodiment described above, the following effects can be obtained.

  (I). The hydraulic oil supply connection portion 12 protrudes from the outer peripheral surface of the sleeve 10 at the five oil holes 16 to 24 formed so as to open into the sleeve 10 of the OCV mounting body 8. Of these five oil holes 16 to 24, particularly at the positions of the oil holes 18, 22, and 24 that serve as the hydraulic oil supply passage to the variable valve mechanism 26, the hydraulic oil supply connection portion 12 is connected to the cam cap 28. A distal end surface 12a that abuts against the contact surface 28a is formed. The three oil holes 18, 22, and 24 are extended to the front end surface 12a and open, and the oil passage 36 for supplying high-pressure hydraulic oil from the hydraulic pump P that opens to the contact surface 28a of the cam cap 28 and The cam cap oil passages 30 and 32 are connected.

  The OCV mounting body 8 is integrally formed with the cylinder head cover 2 by insert molding. At the time of insert molding, the OCV mounting body 8 is a burr cut surface 12b on the peripheral surface of the hydraulic oil supply connecting portion 12 closer to the sleeve 10 than the front end surface 12a. In contact with the burr cutting surface 46b of the fourth mold 46, the intrusion of the molten resin M is prevented.

  As described above, since the burr cutting surface 12b exists at a position away from the tip surface 12a toward the sleeve 10, the molten resin M is formed on the mating surface with the burr cutting surface 46b of the fourth mold 46 at the time of insert molding. Does not reach the front end surface 12a. For this reason, it is possible to prevent burrs from entering the oil holes 18, 22, 24 opened in the front end surface 12 a.

  In this way, when the resin cylinder head cover body 2a is integrated by insert molding, entry of burrs into the hydraulic oil supply oil holes 18, 22, 24 formed in the OCV mounting body 8 can be prevented.

  Therefore, the burrs are not peeled off themselves, and the peeled burrs are not sucked into the variable valve mechanism 26 or the OCV 4 together with the working oil, and there is no possibility of causing trouble in the operation. Further, since there is no burr cutting process, the number of processing steps does not increase, and part of the burr cut during the burr cutting process does not enter the oil holes 18, 22, 24.

  Since the oil holes 16 and 20 are dedicated oil holes for discharging the working oil into the cylinder head cover 2, even if a burr enters the opening or the inside of the oil holes 16 and 20, the variable valve mechanism While repeating the driving 26, the cylinder head cover 2 is naturally discharged. Since this hydraulic oil returns to the oil pan and is filtered by the filter and then pumped by the hydraulic pump P, the peeled burr is not clogged by the variable valve mechanism 26 and others.

  (B). The OCV mounting body 8 is integrally formed of a metal material having higher rigidity than the resin forming the resin cylinder head cover body 2a. For this reason, deformation of the OCV mounting hole 14 in the sleeve 10 can be prevented, the mounting property of the OCV 4 can be improved, and high oil tightness can be maintained when the OCV 4 is mounted. The hydraulic oil supply connection portion 12 can also be prevented from being deformed as a whole and the tip surface 12a for contact with the cylinder head H side from being deformed, and high adhesion of the tip surface 12a to the cylinder head H side can be obtained. And high oil tightness can be maintained. For this reason, the operability of the variable valve mechanism 26 can be maintained satisfactorily.

[Embodiment 2]
The configuration of the cylinder head cover 48 of the present embodiment is as shown in FIG. In other words, the configuration of the first embodiment is different in that a resin retainer 52 exists as shown in FIG. In addition, the same code | symbol is attached | subjected about the structure same as the said Embodiment 1. FIG.

  As shown in FIG. 9, the resin retainer 52 is disposed at the tip of the resin portion 2b covering the hydraulic cylinder supplying cover 12 to the position adjacent to the burr cutting surface 12b in the resin cylinder head cover body 2a. Are joined by ultrasonic welding. Thus, the inner portion of the retainer 52 covers the peripheral portion of the burr cut surface 12b of the hydraulic oil supply connecting portion 12 adjacent to the tip of the resin portion 2b.

  In addition, the primer mentioned above may be apply | coated to the burr cutting surface 12b side of the connection part 12 for hydraulic oil supply, and the retainer 52 may be welded also to the burr cutting surface 12b simultaneously with the front-end | tip of the resin part 2b.

According to the second embodiment described above, the following effects can be obtained.
(I). The effect of the first embodiment is produced.
(B). A retainer 52 is welded to the tip of the resin portion 2b. Alternatively, the bonding state between the OCV mounting body 8 and the resin cylinder head cover body 2a can be reinforced by being welded to the burr cutting surface 12b together with the tip of the resin portion 2b. Therefore, the OCV mounting body 8 and the resin cylinder head cover body 2a can be integrated more firmly.

[Embodiment 3]
In this example, an OCV mounting body 108 shown in FIG. 10 is used instead of the OCV mounting body 8 of the first embodiment. 10A is a left side view, and FIG. 10B is a bottom view. The OCV mounting body 108 of the present embodiment is provided with a sleeve 110 and a hydraulic oil supply connecting portion 112 as in the OCV mounting body 8 of the first embodiment. However, the hydraulic oil supply connecting portion 112 forms a bolt through hole 127a in addition to the oil hole region 126 in which the oil holes 116 to 124 having the same function as the five oil holes 16 to 24 described above are formed. The bolt fastening region 127 is integrally provided.

  The burr cutting surface 112b of the connection portion 112 for supplying hydraulic oil also exists at a position approaching the sleeve 110 side from the front end surface 112a, and exists along both the oil hole region 126 and the bolt fastening region 127 together with the front end surface 112a.

In the bolt fastening region 127, the surface on the sleeve 110 side protrudes in a cylindrical shape around the bolt through hole 127a, and the ring-shaped upper surface forms a burr cutting surface 127b.
Therefore, as shown in FIG. 11, when integrated with the resin cylinder head cover body 102 a by insert molding, the bolt through holes 127 a are also exposed outside the cylinder head cover 102. In the present embodiment, the bolt fastening region 129 is also provided on the cam cap 128 so as to protrude in parallel with the axis of the camshaft 134. In the bolt fastening region 129, a bolt screw hole 129a is formed at a position facing the bolt through hole 127a. Therefore, as shown in FIG. 11, the bolt B can be screwed into the bolt screw hole 129a of the cam cap 128 from the outside of the cylinder head cover 102 through the bolt through hole 127a. As a result, the OCV mounting body 108 can be directly fixed to the cylinder head side by pressing it against the cam cap 128, not via the resin cylinder head cover body 102a.

  In addition, cam cap oil passages 130 and 132 and cam shaft oil passages 134a and 134b are formed in the interior from the cam cap 128 to the camshaft 134, as indicated by broken lines, and from the cam cap 128 to the journal bearing 135, An oil passage 136 for supplying hydraulic oil from the hydraulic pump P is formed. These oil passages 130, 132, 134a, 134b, 136 have the same configuration as the oil passages 30, 32, 34a, 34b, 36 described in the first embodiment.

According to the third embodiment described above, the following effects can be obtained.
(I). The effect of the first embodiment is produced.
(B). In this way, by providing the bolt fastening region 127 in the connection portion 112 for supplying hydraulic oil in the OCV mounting body 108 and forming the bolt through hole 127a, the OCV can be directly connected without using the resin cylinder head cover body 2a. The mounting body 108 can be bolted to the cylinder head side. For this reason, the front end surface 112a of the hydraulic oil supply connecting portion 112 can be firmly clamped directly to the cylinder head side, here the cam cap 128. Accordingly, the oil holes 118, 122, 124 for supplying hydraulic oil (same as the oil holes 18, 22, 24 in the first embodiment) are connected to the oil passages 130, 132, 136 on the cylinder head side with high oil tightness. It can be firmly fixed.

[Embodiment 4]
The state of the mounting site of the cylinder head cover 202 of the present embodiment is shown in FIG. The OCV mounting portion in the present embodiment is separated from the resin cylinder head cover main body 202a by a resin valve case 206 as a resin member, and the OCV mounting body 208 is integrated with the resin valve case main body 206a by insert molding. By doing so, it is formed as shown in FIG. The OCV mounting body 208 has the same shape as the OCV mounting body 8 (FIGS. 3 and 4) of the first embodiment.

  As shown in FIG. 14, the resin retainer 252 having the same shape as the resin retainer 52 (FIG. 8) of the second embodiment is replaced with the resin of the resin valve case body 206a as described in the second embodiment. The integrated state of the resin valve case main body 206a and the OCV mounting body 208 may be reinforced by welding to the tip of the portion 206b.

  Such insert molding of the resin valve case 206 is arranged in insert molds 240 to 246 as shown in FIG. 15A, and is placed in the cavity 250 as shown in FIG. It is formed by injecting molten resin M. In particular, in the combination with the mold 246, the burr cutting surface 246b of the mold 246 comes into contact with the burr cutting surface 212b provided in the hydraulic oil supply connecting portion 212 of the OCV mounting body 208, thereby generating a burr cutting effect.

  By welding the lower surface 206c of the resin valve case 206 on the resin cylinder head cover body 202a so that the resin valve case 206 formed in this way covers the opening 202b of the resin cylinder head cover body 202a. The cylinder head cover 202 is completed.

By applying this to the cylinder head H, the configuration shown in FIG. 12 is completed.
According to the third embodiment described above, the following effects can be obtained.
(I). Even when the resin valve case 206 is used, the effect of the first embodiment is produced.

(B). Further, when the resin retainer 252 is used as shown in FIG. 14, even when the resin valve case 206 is used, the effect of the second embodiment is produced.
[Other embodiments]
(A). Also in the third embodiment, as shown in FIG. 16, by providing a resin retainer 352 as in the second embodiment, the resin cylinder head cover body 102a and the OCV mounting body 108 are integrated. It may be strengthened.

  (B). In each of the embodiments described above, the oil holes 16, 20, 116, 120 (FIGS. 4 and 10), which are dedicated oil discharge holes, are formed on the burr cutting surfaces 12b, 112b of the hydraulic oil supply connection parts 12, 112. Although it was opened, it may be opened on a surface lifted to the tip side from the burr cutting surface.

  That is, in the first, second, and fourth embodiments, instead of the configuration of FIG. 4, the burr cutting surface 312 b is closer to the distal end surface 312 a of the hydraulic oil supply connecting portion 312 as in the OCV mounting body 308 shown in FIG. 17. Alternatively, the oil holes 316 and 320 dedicated to discharging the hydraulic oil may be opened on the lifting surface 354. Similarly, in the third embodiment, instead of the configuration shown in FIG. 10, it is lifted closer to the distal end surface 412a of the hydraulic oil supply connecting portion 412 than the burr cutting surface 412b as in the OCV mounting body 408 shown in FIG. Oil holes 416 and 420 dedicated to hydraulic oil discharge may be opened on the surface 454.

  With this configuration, the oil holes 316, 320, 416, and 420 dedicated to the discharge of hydraulic oil can be surely intruded by burr in the same manner as the oil holes 318, 322, 324, 418, 422, and 424 for supplying hydraulic oil. Can be prevented.

  (C). The resin valve case 206 of the fourth embodiment may be configured to use the OCV mounting body provided with the bolt fastening region shown in the third embodiment. Thus, even when the resin valve case 206 is used, the OCV mounting body can be more firmly fixed to the cylinder head side.

  (D). In the cylinder head cover 202 of the fourth embodiment, the resin cylinder head cover main body 202a is used except for the resin valve case 206. However, the cylinder head cover main body may be partially or entirely made of metal instead of resin. In this case, the joint between the resin valve case 206 and the cylinder head cover main body may be mechanical joining such as bolt fastening in addition to welding.

  (E). In the above-described embodiments, the sleeve mounting hole has an axis parallel to the upper surface of the cylinder head, but the OCV insertion side may be separated from the upper surface of the cylinder head so as to have an angle on the upper surface of the cylinder head. As a result, the OCV attached to the sleeve tilts downward with respect to the horizontal plane at the tip end side of the OCV, that is, the spool housing side. By tilting the OCV tip side downward in this manner, the hydraulic oil that slightly leaks through the clearance between the mounting hole and the spool housing can be more reliably discharged into the cylinder head cover.

FIG. 3 is a longitudinal sectional view showing an OCV before mounting and a state around a mounting site of a cylinder head cover in the first embodiment. FIG. 3 is a longitudinal sectional view showing a state around a mounting part of the cylinder head cover after the OCV is mounted in the first embodiment. The perspective view of the OCV mounting body integrated in the resin cylinder head cover main body by insert molding in Embodiment 1. FIG. Structure explanatory drawing of the said OCV mounting body. The shape explanatory drawing of the O-ring used for the said OCV mounting body. The insert molding explanatory drawing in Embodiment 1. FIG. The longitudinal cross-sectional view which shows the state of the OCV mounting site | part before mounting | wearing in Embodiment 2. FIG. The top view of the retainer used for Embodiment 2. FIG. Explanatory drawing of the welding state of the said retainer to the connection part for hydraulic oil supply. FIG. 5 is a configuration explanatory diagram of an OCV mounting body according to a third embodiment. Configuration explanatory drawing of the OCV mounting part of Embodiment 3. FIG. FIG. 6 is a longitudinal sectional view showing a state of an OCV mounting part according to a fourth embodiment. FIG. 6 is a longitudinal sectional view of a resin valve case according to a fourth embodiment. FIG. 10 is a longitudinal sectional view of a resin valve case using a retainer as a modification of the fourth embodiment. Insert molding explanatory drawing in Embodiment 4. FIG. Structure explanatory drawing of the OCV mounting site | part in other embodiment. Structure explanatory drawing of the OCV mounting body in other embodiment. Structure explanatory drawing of the OCV mounting body in other embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Cylinder head cover, 2a ... Resin cylinder head cover main body, 2b ... Resin part, 4 ... OCV, 4a ... Spool housing, 6 ... Installation part, 8 ... OCV mounting body, 10 ... Sleeve, 12 ... Connection part for hydraulic oil supply , 12a ... tip surface, 12b ... burr cut surface, 12c ... O-ring groove, 14 ... mounting hole for OCV, 16, 20 ... oil hole exclusively for discharging hydraulic oil, 18, 22, 24 ... oil hole for supplying hydraulic oil , 25 ... O-ring, 26 ... variable valve mechanism, 28 ... cam cap, 28a ... contact surface, 30, 32 ... cam cap oil passage, 34 ... cam shaft, 34a, 34b ... cam shaft oil passage, 36 ... supply Oil passage, 36 ... Oil passage for supplying high-pressure hydraulic oil, 40, 42, 44, 46 ... Mold for insert molding, 42a ... Cylindrical projection, 44a ... Cylindrical projection, 46a ... Recess, 46b ... Burr cutting 48, cylinder head cover, 50 ... cavity, 52 ... resin retainer, 102 ... cylinder head cover, 102a ... resin cylinder head cover body, 108 ... OCV mounting body, 110 ... sleeve, 112 ... hydraulic oil supply connection, 112a ... Tip surface, 112b ... Burr cut surface, 116-124 ... Oil hole, 126 ... Oil hole region, 127 ... Bolt fastening region, 127a ... Bolt through hole, 127b ... Burr cut surface, 128 ... Cam cap, 129 ... Bolt Fastening region, 129a ... bolt screw hole, 130, 132 ... cam cap oil passage, 134 ... cam shaft, 134a, 134b ... cam shaft oil passage, 136 ... oil supply oil passage, 202 ... cylinder head cover, 202a ... Resin cylinder head cover body, 202b... Opening, 206. Case, 206a ... Resin valve case body, 206b ... Resin portion, 206c ... Bottom surface, 208 ... OCV mounting body, 212 ... Hydraulic oil supply connection part, 212b ... Burr cut surface, 240-246 ... Mold for insert molding 246b ... Burr cutting surface, 250 ... Cavity, 252 ... Retainer made of resin, 308 ... OCV mounting body, 312 ... Connecting portion for supplying hydraulic oil, 312a ... Tip surface, 312b ... Burr cutting surface, 316, 320 ... Working oil Oil hole exclusively for discharge, 316, 320 ... Oil hole exclusively for hydraulic oil discharge, 318, 322, 324 ... Oil hole for supplying hydraulic oil, 352 ... Resin retainer made of resin, 354 ... Lifting surface, 408 ... OCV mounting body, 412... Hydraulic oil supply connection portion, 412 a... Tip surface, 412 b. Oil holes for supplying hydraulic oil, 454 ... lifting surface, B ... bolt, H ... cylinder head, M ... resin, P ... hydraulic pump, P1, P2, P3, P4, P5 ... port.

Claims (10)

Supplying the operating hydraulic pressure to the variable valve mechanism of the internal combustion engine by integrating the resin member constituting a part or the whole of the cylinder head cover of the internal combustion engine by insert molding when molding the resin member. An oil control valve mounting body capable of mounting an oil control valve for controlling exhaust to the cylinder head cover,
A sleeve having an oil control valve mounting hole and a plurality of oil holes communicating with the mounting hole;
Among the plurality of oil holes, at least a position of a hydraulic oil supply oil hole serving as a hydraulic oil supply passage to the variable valve mechanism is formed so as to protrude from the outer peripheral surface of the sleeve and contact the cylinder head side. For supplying hydraulic oil, which has a front end surface and allows the hydraulic oil supply oil hole to be connected to an oil passage on the cylinder head side by opening the hydraulic oil supply oil hole extending to the front end surface. A connection portion,
The oil control valve mounting body is characterized in that a burr cut surface is formed on the outer periphery of the connection portion for supplying hydraulic oil on a side closer to the sleeve than the front end surface. 2. The oil control valve according to claim 1, wherein the sleeve and the connecting portion for supplying hydraulic oil are integrally formed of a material having higher rigidity than the resin forming the resin member. Wearing body. 3. The oil control valve mounting body according to claim 2, wherein the highly rigid material is a metal. A resin member constituting a part or the whole of a cylinder head cover of an internal combustion engine, wherein a burr cut surface on a mold side is formed on the burr cut surface of the oil control valve mounting body according to any one of claims 1 to 3. A resin member characterized by being integrated by insert molding in a contact state. 5. The oil according to claim 4, wherein the oil control valve is attached to the resin portion formed by the insert molding so as to cover the burr cut surface on the oil control valve mounting body side integrated with the resin member. A resin member comprising a retainer for reinforcing a joined state between a control valve mounting body and the resin portion. 6. The resin member according to claim 5, wherein the retainer is bonded to the burr cutting surface on the oil control valve mounting body side together with the resin portion formed by the insert molding. 4. The oil control valve mounting body according to claim 3, wherein a bolt fastening region in which a bolt through hole is formed in a direction perpendicular to the tip end surface is provided in a part of the connection portion for supplying hydraulic oil. . A resin member constituting a part or the whole of a cylinder head cover of an internal combustion engine, wherein a burr cut surface on a mold side is brought into contact with the burr cut surface of the oil control valve mounting body according to claim 7, and the A resin member characterized by being integrated by insert molding in a state where one end of the bolt through hole in the bolt fastening region is released to the outside and the other end to the inside. A cylinder head cover for an internal combustion engine, wherein the resin member according to claim 8 is partially or entirely made. A cylinder head cover mounting structure according to claim 9 for a cylinder head of an internal combustion engine,
10. The resin for a cylinder head cover of an internal combustion engine according to claim 9, wherein an oil passage for supplying hydraulic oil to the variable valve mechanism is opened and a fixing surface on the cylinder head side where a bolt screw hole is opened. A bolt formed on the fixed surface on the cylinder head side is a bolt that is brought into contact with a front end surface of the oil control valve mounting body integrated with a made member and is inserted from the outside into a bolt through hole in the bolt fastening region. A cylinder head cover mounting structure for an internal combustion engine, which is bolted by being screwed into a screw hole.

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