JP2006046083A - Resin-made cylinder head cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin-made cylinder head cover capable of preventing deformation of a mounting section of an oil control valve. <P>SOLUTION: Sleeves 10, 12 are covered with resin-made caps 18, 20 and are integrated with the resin-made cylinder head cover. Since inside spaces of the sleeves 10, 12 are mounting holes for mounting the oil control valve, high precision in the other parts is unnecessary and burden in machining is reduced. Furthermore, effect between a plurality of machining sections is eliminated and effect on dimensional precision of the mounting hole due to cutting resistance is eliminated. Since the sleeves 10, 12 have higher rigidity than that of resin for forming a resin-made cylinder head cover main body 4, effect of deformation and distortion hardly reach the mounting hole when mounting the resin-made cylinder head cover on a cylinder head, which thus prevents deformation of the mounting section which may cause improper mounting and improper operation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a resin cylinder head cover to which an oil control valve for controlling supply / discharge of operating hydraulic pressure to a variable valve mechanism of an internal combustion engine is mounted.

  When a hydraulically driven variable valve mechanism is provided in a timing sprocket or timing pulley of an internal combustion engine, an operating hydraulic supply / discharge oil passage from the oil control valve to the variable valve mechanism is provided in the camshaft.

  In this way, as a configuration to supply the operating oil pressure to the oil passage provided on the camshaft, a valve case dedicated to the oil control valve is attached to the upper part of the insertion opening opened at the upper part of the cylinder head cover, and the oil control is inside this valve case A technique for inserting and fixing a valve has been proposed (see, for example, Patent Document 1).

In such a configuration, since the distance between the oil control valve and the cam cap is increased, an intermediate member having an oil passage inside is specially disposed between the oil control valve and the cam cap. As a result, a hydraulic oil supply / discharge oil passage is formed from the oil control valve to the variable valve mechanism via the valve case, intermediate member, cam cap, and camshaft.
Japanese Patent No. 3525709 (page 4-5, FIG. 3)

  However, in the configuration of Patent Document 1, since metal processing is premised, high-precision processing is required for the valve case and the intermediate member as well as the oil control valve. In particular, since the valve case must be mounted in an oil-tight state on both the intermediate member and the oil control valve, high-precision processing is required at least in these two mounting portions. And since it is the process with respect to the same valve case, there exists a possibility of producing deformation | transformation, such as cutting resistance, in a mounting part mutually. For this reason, there exists a possibility that the mounting precision of the oil control valve including an intermediate member may fall. Furthermore, since a large number of high-precision metal workings are performed in a narrow range, there is a high possibility that foreign matters such as chips remain.

  When the above-mentioned cylinder head cover and valve case are considered to be made of resin for weight reduction, the above-mentioned metal processing problem that foreign matters such as chips remain is solved. Is done.

  However, when the resin cylinder head cover is attached to the cylinder head, the rigidity is lower than that of metal. Therefore, the cylinder head cover is deformed or distorted, which also affects the valve case. For this reason, even if the mounting part can be machined with high accuracy, the dimensional accuracy of the mounting part is reduced due to deformation or distortion during mounting to the cylinder head, making it impossible to mount the oil control valve properly. There is a risk of hindering valve operation.

  An object of the present invention is to provide a resin cylinder head cover that can prevent deformation of a mounting portion of an oil control valve.

In the following, means for achieving the above object and its effects are described.
The resin cylinder head cover according to claim 1 is a resin cylinder head cover to which an oil control valve for controlling supply / discharge of operating hydraulic pressure to / from a variable valve mechanism of an internal combustion engine is mounted. A resin cylinder head cover body in which a part of the storage recess forms an insertion opening of the oil control valve, and a material that is higher in rigidity than the resin forming the resin cylinder head cover body, A sleeve having an oil hole for connecting to a port of an oil control valve mounted in the mounting hole and having an internal space as a mounting hole, and attached to the resin cylinder head cover body covering the storage recess And a resin cap for fixing the sleeve stored in the storage recess. The features.

  In the configuration of the present invention, high processing accuracy is required for the mounting hole of the sleeve to which the oil control valve is mounted, and the processing accuracy as high as that of the mounting hole is not required except for the mounting hole of the sleeve. Therefore, highly accurate machining is extremely reduced and the burden of machining is reduced. Furthermore, there is no influence between a plurality of machining points, and no influence on the dimensional accuracy of the mounting hole due to cutting resistance or the like.

  The sleeve is formed of a material having higher rigidity than the resin forming the resin cylinder head cover body. Therefore, even if the resin cylinder head cover is covered with a resin cap in the housing recess of the resin cylinder head cover and integrated as a resin cylinder head cover, the effect of deformation or distortion on the resin cylinder head cover main body side Difficult to reach holes.

  Therefore, even if the resin cylinder head cover is deformed or distorted when the resin cylinder head cover is fastened to the cylinder head, or the resin cylinder head cover may be deformed due to a creep phenomenon, the resin cylinder head cover is resistant to such deformation and distortion. Thus, the dimensional accuracy of the mounting hole inside the sleeve is maintained.

As described above, the resin cylinder head cover of the present invention can prevent deformation of the mounting portion that may cause mounting failure or malfunction of the oil control valve.
According to a second aspect of the present invention, in the resin cylinder head cover according to the first aspect, the sleeve is made of a metal material.

  As such a material having higher rigidity than the resin forming the resin cylinder head cover main body, a metal material can be used. An oil control valve can be appropriately mounted by processing a mounting hole with a metal material with high accuracy to form a sleeve, placing the sleeve in a storage recess, and fixing it with a resin cap.

  The resin cylinder head cover according to claim 3, wherein the housing recess is formed on an inner surface side of the resin cylinder head cover main body, and a part thereof is an outer surface side as an insertion opening of the oil control valve. It is characterized by being open to.

  The storage recess can be formed on either the outer surface or the inner surface of the resin cylinder head cover body. However, as described above, the resin cap is attached to the inner surface of the resin cylinder head cover body. Thus, the sleeve in the storage recess is fixed. For this reason, even if hydraulic fluid leaks from between the resin cap and the storage recess, it does not leak to the outside. Accordingly, the attachment of the resin cap to the resin cylinder head cover main body only needs to take into account the attachment strength and the tight fixation to the sleeve, and the attachment operation is facilitated.

  The resin cylinder head cover according to claim 4, wherein the resin cap is an oil for supplying and discharging hydraulic oil to a position corresponding to an oil hole provided in the sleeve. A hole or oil passage is formed.

  Thus, the resin cap supplies and discharges the hydraulic oil to and from the oil control valve by forming an oil hole or oil passage for supplying and discharging the hydraulic oil at a position corresponding to the oil hole provided in the sleeve. It is possible to reduce the number of parts that form the oil holes or oil passages, and to reduce the weight and manufacturing cost.

  In the resin cylinder head cover according to claim 5, in any one of claims 1 to 4, the resin cap is joined by welding to a peripheral edge portion of a housing recess of the resin cylinder head cover body. The sleeve in the storage recess is fixed.

Thus, the resin cap may be attached to the resin cylinder head cover main body by welding, and the sleeve in the housing recess can be easily fixed.
The resin cylinder head cover according to claim 6, wherein in any one of claims 1 to 5, a rubber-like elastic body having an oil hole at a position corresponding to an oil hole provided in the sleeve on an outer periphery of the sleeve. A cylindrical gasket made of is arranged in a compressed state, and a seal is made between the sleeve, the storage recess, and the resin cap.

  Such a compressed state of the cylindrical gasket can be easily realized by placing a sleeve covered with the cylindrical gasket in the housing recess while applying pressure with the resin cap when the resin cap is attached. Thus, by arranging the cylindrical gasket made of a rubber-like elastic body around the sleeve, it is possible to easily seal between the sleeve and the resin cap and between the sleeve and the housing recess.

[Embodiment 1]
The perspective view of FIG. 1 shows the main part of the cylinder head cover 2 to which the above-described invention is applied. 1A is an external view, and FIG. 1B is a perspective view of the cylinder head cover 2 turned upside down. 2A is a plan view and FIG. 2B is a bottom view. Note that the internal combustion engine to which the cylinder head cover 2 is applied can adjust both the valve timing of the intake valve and the valve timing of the exhaust valve.

  In this cylinder head cover 2, as shown in the exploded perspective view of FIG. 3, sleeves 10 and 12 and a rubber cylindrical gasket 14 are respectively provided to the two storage recesses 6 and 8 provided in the resin cylinder head cover body 4. , 16 are arranged. The resin caps 18 and 20 are joined to the peripheral edge portions 6a and 8a of the storage recesses 6 and 8 by welding. As a result, the combination of the sleeves 10 and 12 and the cylindrical gaskets 14 and 16 is fixed inside the storage recesses 6 and 8.

  The resin cylinder head cover main body 4 is integrally formed of resin as shown in the perspective view of FIG. Of the storage recesses 6, 8 provided on the inner surface 4 a side of the resin cylinder head cover body 4, the first storage recess 6 is an oil control valve (hereinafter referred to as “OCV”) for adjusting the valve timing of the intake valve. The second storage recess 8 is for mounting an OCV for adjusting the valve timing of the exhaust valve.

  The first storage recess 6 is formed in a semi-cylindrical shape, and its axial direction is arranged in a direction perpendicular to the intake camshaft axial direction, and is arranged in parallel to the top plate portion 4 b of the resin cylinder head cover body 4. A part of the front end side of the first storage recess 6 is opened to the outer surface 4c side of the resin cylinder head cover body 4 as an OCV insertion opening 6b.

  The basic shape of the second storage recess 8 is the same as that of the first storage recess 6, is formed in a semi-cylindrical shape, and is arranged in a direction perpendicular to the intake camshaft axial direction. However, unlike the 1st accommodation recessed part 6, it is inclined and arrange | positioned with respect to the top-plate part 4b so that the insertion opening part 8b side may face diagonally upward. Thus, the insertion opening 8b is opened on the outer surface 4c side of the resin cylinder head cover body 4.

  The sleeves 10 and 12 respectively disposed in the storage recesses 6 and 8 are as shown in FIG. Here, (A) is a plan view, (B) is a front view, (C) is a bottom view, (D) is a perspective view, (E) is a left side view, and (F) is a right side view. Further, rubber cylindrical gaskets 14 and 16 covering the sleeves 10 and 12 are as shown in FIG. Here, (A) is a plan view, (B) is a front view, (C) is a bottom view, (D) is a perspective view, and (E) is a left side view. The OCVs 22 and 24 mounted in the mounting holes 10a and 12a of the sleeves 10 and 12 are as shown in FIG. Here, (A) is a plan view, (B) is a front view, (C) is a bottom view, (D) is a perspective view, (E) is a right side view, and (F) is a rear view.

  In the present embodiment, the sleeves 10 and 12 are made of metal and are formed in a cylindrical shape. The metal material constituting the sleeves 10 and 12 is formed of a material having substantially the same thermal expansion coefficient as the spool housings 22a and 24a of the OCVs 22 and 24, specifically, an aluminum alloy. The sleeves 10 and 12 may be made of the same metal material as the spool housings 22a and 24a of the OCVs 22 and 24.

  The sleeves 10 and 12 penetrate outward from the inner mounting holes 10a and 12a at positions corresponding to the five ports p1, p2, p3, p4 and p5 provided in the spool housings 22a and 24a of the OCVs 22 and 24. Oil holes s1, s2, s3, s4, and s5 are formed by opening the holes. Tapered surfaces 10c and 12c for facilitating the mounting work of the OCVs 22 and 24 are formed inside the OCV insertion ends 10b and 12b of the sleeves 10 and 12, respectively.

  The cylindrical gaskets 14 and 16 covering the outer peripheral surfaces of the sleeves 10 and 12 include through holes g1, g2, g3, g4, and g5 at positions corresponding to the oil holes s1 to s5 of the sleeves 10 and 12, and are further cylindrical. On the outer peripheral surfaces of the gaskets 14 and 16, ridges h1 are formed in a mesh shape around the through holes g1 to g5. Further, a protrusion h2 is formed over the entire circumference near the insertion side end of the OCVs 22 and 24. In addition, although each protrusion h1 and h2 are each filled and shown in the figure, it is integrally molded with rubber | gum with the cylindrical gasket main bodies 14a and 16a.

  When the combination of the sleeves 10 and 12 and the cylindrical gaskets 14 and 16 is sandwiched between the housing recesses 6 and 8 and the resin caps 18 and 20 by the protrusions h1 and h2, the sleeves 10 and 12 The oil holes s1 to s5 are sealed between the outer peripheral surface of the housing and the storage recesses 6 and 8 and the inner peripheral surfaces of the resin caps 18 and 20. Further, sealing with the outside of the resin cylinder head cover body 4 is performed.

  The storage recesses 6 and 8 have the same length as the sleeves 10 and 12 in the length direction, and have a diameter slightly smaller than the diameter of the combination of the sleeves 10 and 12 and the cylindrical gaskets 14 and 16 in the diameter direction. It has become. Therefore, the combination of the sleeves 10 and 12 and the cylindrical gaskets 14 and 16 is inserted into the storage recesses 6 and 8 while the ridges h1 and h2 of the cylindrical gaskets 14 and 16 are compressed. Thus, as shown in FIG. 8, a combination of the sleeves 10 and 12 and the cylindrical gaskets 14 and 16 can be disposed in the storage recesses 6 and 8.

  The resin caps 18 and 20 are welded and joined to the storage recesses 6 and 8 so as to sandwich the combination of the sleeves 10 and 12 and the cylindrical gaskets 14 and 16 between the storage recesses 6 and 8. . As a result, the cylinder head cover 2 to which the OCVs 22 and 24 can be mounted is completed as shown in FIG.

  Here, the resin caps 18 and 20 will be described. The first resin cap 18 is shown in FIG. 9, (A) is a plan view, (B) is a front view, (C) is a bottom view, (D) is a perspective view, (E) is a left side view, and (F) is a rear view. The gasket 28a is shown by being disposed only in (A) and (D).

  The first resin cap 18 is integrally formed of resin (in this embodiment, the same resin as the resin cylinder head cover main body 4). The semi-cylindrical cap main body 26 and the connection portion 28 are connected to each other. I have. Intermediate oil passages 30, 32 corresponding to the oil holes s 4, s 5 of the first sleeve 10 are formed at the top of the cap body 26 over the connection portion 28. The intermediate oil passages 30 and 32 are formed while shifting the axial position in the connecting portion 28, and the openings 30 a and 32 a at the tip of the connecting portion 28 are shifted in a direction perpendicular to the axial direction of the cap body 26. .

  Two drain oil passages 34 and 36 are formed in one of the base end edge portions 26a of the cap body 26 in a semicircular shape. The discharge oil passages 34 and 36 are discharges provided on one side of the peripheral portion 6 a when the base end edge portion 26 a of the first resin cap 18 is welded to the peripheral portion 6 a of the first storage recess 6. Discharge oil passages 60 and 62 (FIG. 1) are formed together with the oil passages 6c and 6d. The drain oil passages 60 and 62 correspond to the oil holes s 1 and s 3 of the first sleeve 10, and discharge the hydraulic oil into the cylinder head cover 2.

  A supply oil passage 37 is formed in a concave shape between the two discharge oil passages 34 and 36. The supply oil passage 37 is supplied with hydraulic pressure along with a concave supply oil passage 6 e provided on the inner peripheral surface of the first storage recess 6.

  The second resin cap 20 is shown in FIG. 10, (A) is a plan view, (B) is a front view, (C) is a bottom view, (D) is a perspective view, (E) is a left side view, (F) is a right side view, and (G). FIG. Note that the gasket 40a is shown only on (A) and (D).

  The second resin cap 20 is integrally formed of resin (in this embodiment, the same resin as the resin cylinder head cover main body 4), and the semi-cylindrical cap main body 38 and the connection portion 40 are connected to each other. I have. Intermediate oil passages 42, 44 corresponding to the oil holes s 4, s 5 of the second sleeve 12 are formed at the top of the cap body 38 over the connection portion 40. The intermediate oil passages 42, 44 are formed while shifting the axial position in the connection portion 40, and the openings 42 a, 44 a at the tip of the connection portion 40 are shifted in a direction perpendicular to the axial direction of the cap body 38. .

  Two drain oil passages 45 and 46 are formed in one of the base end edge portions 38a of the cap body 38 in a semicircular shape. The drain oil passages 45 and 46 are provided on one side of the peripheral edge 8 a when the base end edge 38 a of the second resin cap 20 is welded to the peripheral edge 8 a of the second storage recess 8. The drain oil passages 63 and 64 are formed together with the drain oil passages 8 c and 8 d and the drain recess 48. In addition, since the hydraulic oil cannot be discharged into the cylinder head cover 2 only by the combination of the discharge oil passage 45 of the second resin cap 20 and the discharge oil passage 8c of the second storage recess 8, the discharge recess 48 is provided.

  A supply oil passage 47 is formed in a concave shape between the two discharge oil passages 45 and 46. The supply oil passage 47 is supplied with hydraulic pressure along with the concave supply oil passage 8e provided on the inner peripheral surface of the second storage recess 8.

  A cylinder head cover 2 as shown in FIG. 1 is formed by these components. The cylinder head cover 2 is fixed to the cylinder head 50 as shown in the sectional view of FIG. As a result, the connecting portion 28 of the first resin cap 18 comes into contact with the top surface of the cam cap 54 for the intake camshaft 52, and the intermediate oil passage 30 is retarded through the cam cap oil passage 54a. The intermediate oil passage 32 is connected to the advance oil passage 52b via the cam cap oil passage 54b. At this time, sealing is performed so that hydraulic oil does not leak from the contact surface by the gasket 28a provided at the tip of the connecting portion 28. As a result, the oil hole s4 of the first sleeve 10 connected to the intermediate oil passage 30 is connected to the retarded oil passage 52a side, and the oil hole s5 of the first sleeve 10 connected to the intermediate oil passage 32 advances. It is connected to the square oil passage 52b side.

  Further, the connecting portion 40 of the second resin cap 20 contacts the top surface of the cam cap 58 for the exhaust camshaft 56, and the intermediate oil passage 42 is connected to the retarded oil passage 56a via the cam cap oil passage 58a. The intermediate oil passage 44 is connected to the advance oil passage 56b through the cam cap oil passage 58b. At this time, the gasket 40a provided at the tip of the connecting portion 40 is sealed so that the hydraulic oil does not leak from the contact surface. As a result, the oil hole s4 of the second sleeve 12 connected to the intermediate oil passage 42 is connected to the retarded oil passage 56a side, and the oil hole s5 of the second sleeve 12 connected to the intermediate oil passage 44 advances. It is connected to the square oil passage 56b side.

  The supply oil passage 37 of the first resin cap 18 connected to the oil hole s2 of the first sleeve 10 and the supply oil passage 6e of the first storage recess 6 are distributed on the supply oil passage 6e side. The hydraulic pressure is supplied from the hydraulic pressure supply oil passage 66 side. The supply oil passage 47 of the second resin cap 20 connected to the oil hole s2 of the second sleeve 12 and the supply oil passage 8e of the second storage recess 8 are connected to the distribution oil passage 66b through the supply oil passage 8e. Thus, the hydraulic pressure is supplied from the hydraulic pressure supply oil passage 66 side. When the cylinder head cover 2 is attached to the cylinder head 50 as shown in FIG. 11, the hydraulic connector 68 protruding from the inner surface of the resin cylinder head cover body 4 is connected to the hydraulic pressure supply section 50a on the cylinder head 50 side. Therefore, the hydraulic pressure is supplied from the hydraulic connector 68 to the hydraulic pressure supply oil passage 66, and the hydraulic pressure can be supplied to the oil holes s2 of the sleeves 10 and 12. In FIG. 11, the cylindrical gaskets 14 and 16 are shown filled in.

  Thus, the OCV 22 spool housing 22a is inserted into the mounting hole 10a of the first sleeve 10 inside the first housing recess 6 from the insertion opening 6b side with respect to the cylinder head cover 2 mounted on the cylinder head 50 in this manner. Secure to the plastic cylinder head cover body 4 side with bolts. Thus, the ports p1 to p5 of the OCV 22 are connected to the oil holes s1 to s5.

  Furthermore, the spool housing 24a of the OCV 24 is inserted into the mounting hole 12a of the second sleeve 12 inside the second storage recess 8 from the insertion opening 8b side, and is fixed to the resin cylinder head cover body 4 side with bolts or the like. Thus, the ports p1 to p5 of the OCV 24 are connected to the oil holes s1 to s5.

  Thus, the OCVs 22 and 24 are mounted as shown in FIG. And with respect to the OCVs 22 and 24, an ECU (electronic control unit) 74 controls the excitation current for the electromagnetic solenoid units 22b and 24b in accordance with the operating state of the engine. As a result, the hydraulic pressure supplied from the hydraulic pressure supply oil passage 66 and the distribution oil passages 66a and 66b to the port p2 of the spool housings 22a and 24a via the oil hole s2 is supplied to one of the oil holes s4 and s5. The oil is discharged from the other side toward the oil holes s1 and s3. In this way, variable valve actuation is performed via the intermediate oil passages 30, 32, 42, 44, the cam cap oil passages 54a, 54b, 58a, 58b and the oil passages 52a, 52b, 56a, 56b provided in the cam shafts 52, 56. The hydraulic pressure is supplied to and discharged from the mechanisms 70 and 72.

  For example, the hydraulic pressure is supplied to the variable valve mechanisms 70 and 72 via the intermediate oil passages 30 and 42, the cam cap oil passages 54a and 58a, and the oil passages 52a and 56a, and the intermediate oil passages 32 and 44, the cam cap oil passages. When the hydraulic pressure is discharged through 54b, 58b and the oil passages 52b, 56b, the variable valve mechanisms 70, 72 are driven to the retard side. As a result, the rotational phase of the camshafts 52 and 56 with respect to the timing sprocket is shifted to the delay side, and the valve timing is retarded.

  On the contrary, the hydraulic pressure is supplied to the variable valve mechanisms 70 and 72 via the intermediate oil passages 32 and 44, the cam cap oil passages 54b and 58b, and the oil passages 52b and 56b, and the intermediate oil passages 30 and 42 and the cam cap oil are supplied. When the hydraulic pressure is discharged through the passages 54a and 58a and the oil passages 52a and 56a, the variable valve mechanisms 70 and 72 are driven to the advance side. As a result, the rotational phase of the camshafts 52 and 56 with respect to the timing sprocket is shifted to the advance side, and the valve timing is advanced.

According to the first embodiment described above, the following effects can be obtained.
(I). In the configuration of the present embodiment, high processing accuracy is required for the mounting holes 10a and 12a in the sleeves 10 and 12 to which the OCVs 22 and 24 are mounted. Other than this, high processing accuracy as high as the mounting holes 10a and 12a is unnecessary. is there. Therefore, highly accurate machining is extremely reduced and the burden of machining is reduced. Further, there is no influence between a plurality of machining points, and no influence on the dimensional accuracy of the mounting holes 10a, 12a due to cutting resistance or the like.

  Further, the sleeves 10 and 12 are made of a material having higher rigidity than the resin forming the resin cylinder head cover body 4, here, an aluminum alloy which is a metal. Therefore, even if the resin cylinder head cover 2 is covered with the resin caps 18 and 20 and integrated with the resin cylinder head cover 2 in the housing recesses 6 and 8 of the resin cylinder head cover body 4, the deformation on the resin cylinder head cover 2 side is deformed. And the influence of distortion hardly reaches the internal mounting holes 10a and 12a.

  For this reason, even when the resin cylinder head cover 2 is fastened to the cylinder head 50, the resin cylinder head cover 2 may be deformed or distorted, or the resin cylinder head cover 2 may be deformed due to a creep phenomenon. The dimensional accuracy of the mounting holes 10a and 12a is maintained.

As described above, the resin cylinder head cover 2 according to the present embodiment can prevent deformation of the mounting portion that may cause mounting failure or malfunction of the OCVs 22 and 24.
(B). The housing recesses 6, 8 are formed on the inner surface 4 a side of the resin cylinder head cover body 4. For this reason, the resin caps 18 and 20 are joined to the inner surface 4a side of the resin cylinder head cover body 4 to fix the sleeves 10 and 12 in the housing recesses 6 and 8. For this reason, even if hydraulic fluid leaks from between the resin caps 18 and 20 and the resin cylinder head cover body 4, it does not leak to the outside. Accordingly, the resin caps 18 and 20 are bonded to the resin cylinder head cover body 4 only by considering the bonding strength and the tight fixation to the sleeves 10 and 12, and the bonding operation does not require high accuracy and is easy to perform. .

  (C). The resin caps 18, 20 form intermediate oil passages 30, 32, 42, 44 for supplying and discharging hydraulic oil at positions corresponding to the oil holes s 4, s 5 provided in the sleeves 10, 12. As a result, the number of parts for forming an oil passage for supplying and discharging hydraulic oil from the OCV 22, 24 side to the variable valve mechanism 70, 72 side can be reduced, and the weight can be reduced and the manufacturing cost can be reduced.

  In the present embodiment, the storage recesses 6, 8 and the resin caps 18, 20 are also provided for the supply oil passages 6e, 8e, 37, 47 and the discharge oil passages 60, 62, 63, 64 corresponding to the oil holes. It is formed by. For this reason, the number of parts can be further reduced, and the weight and manufacturing cost can be reduced.

  (D). The resin caps 18 and 20 and the storage recesses 6 and 8 are joined by welding the base end edge portions 26a and 38a and the peripheral edge portions 6a and 8a. Thus, the sleeves 10 and 12 in the storage recesses 6 and 8 can be easily fixed.

  (E). A rubber-like elastic body having through holes g1 to g5 as oil holes at positions corresponding to the oil holes s1 to s5 provided in the sleeves 10 and 12 on the outer periphery of the sleeves 10 and 12, in this case, a rubber cylindrical shape The gaskets 14 and 16 are arranged in a compressed state in the thickness direction. As a result, a seal is formed between the sleeves 10 and 12 and the storage recesses 6 and 8 and the resin caps 18 and 20.

  The cylindrical gaskets 14 and 16 are compressed as described above when the resin caps 18 and 20 are joined to the sleeves 10 and 12 covered with the cylindrical gaskets 14 and 16 with the resin caps 18 and 20. This can be easily realized by placing the storage recesses 6 and 8 while applying pressure. Thus, by arranging the cylindrical gaskets 14 and 16 made of rubber-like elastic bodies around the sleeves 10 and 12, the sleeves 10 and 12 and the resin caps 18 and 20 and between the sleeves 10 and 12 are accommodated. The space between the recesses 6 and 8 can be easily sealed.

[Embodiment 2]
A resin cylinder head cover 102 of the present embodiment is shown in a perspective view of FIG. In the present embodiment, both the first storage recess 106 and the second storage recess 108 are integrally formed with an inclination with respect to the top plate portion 104 b of the resin cylinder head cover main body 104. Other configurations are basically the same as those of the first embodiment.

According to the second embodiment described above, the following effects can be obtained.
(I). The effects (a) to (e) of the first embodiment are produced.
(B). If the oil passages on the camshaft and cam cap sides are arranged in the same way on the intake side and the exhaust side, the first storage recess 106 and the second storage recess 108 can use the same shape of the resin cap. And cost can be reduced.

[Embodiment 3]
The resin cylinder head cover 202 of the present embodiment is shown in the perspective view of FIG. In the present embodiment, both the first storage recess 206 and the second storage recess 208 are integrally formed in parallel to the top plate portion 204 b of the resin cylinder head cover main body 204. However, the height of the top plate portion 204b differs between the first storage recess 206 and the second storage recess 208 for mounting the OCV. Other configurations are basically the same as those of the first embodiment.

According to the third embodiment described above, the following effects can be obtained.
(I). The effects (a) to (e) of the first embodiment are produced.
(B). The effect (b) of the second embodiment is produced.

[Embodiment 4]
The resin cylinder head cover 302 of the present embodiment is shown in the perspective view of FIG. In the present embodiment, both the first storage recess 306 and the second storage recess 308 are parallel to the top plate portion 304b of the resin cylinder head cover main body 304, but the OCV mounting direction is reversely arranged and integrally molded. Yes. Therefore, it is not necessary to change the height of the top plate portion 304b between the first storage recess 306 and the second storage recess 308 for mounting the OCV as in the third embodiment. Other configurations are basically the same as those of the first embodiment.

According to the fourth embodiment described above, the following effects can be obtained.
(I). The effects (a) to (e) of the first embodiment are produced.
(B). By adjusting the oil passage arrangement on the camshaft and cam cap sides, the first storage recess 306 and the second storage recess 308 can use the same shape of the resin cap, so the parts can be shared and the cost can be reduced. it can.

Furthermore, the height of the resin cylinder head cover 302 can be suppressed.
[Embodiment 5]
The resin cylinder head cover 402 of the present embodiment is shown in the perspective view of FIG. In the present embodiment, the first storage recess 406 and the second storage recess 408 have the OCV mounting directions opposite to each other, and are inclined and integrally molded with respect to the top plate portion 404b of the resin cylinder head cover body 404, respectively. . Therefore, it is not necessary to change the height of the top plate portion 404b between the first storage recess 406 and the second storage recess 408 for mounting the OCV as in the third embodiment. Other configurations are basically the same as those of the first embodiment.

According to the fifth embodiment described above, the following effects can be obtained.
(I). The effects (a) to (e) of the first embodiment are produced.
(B). By adjusting the arrangement of the oil passages on the camshaft and cam cap sides, the first storage recess 406 and the second storage recess 408 can use the same shape of the resin cap, so the parts can be shared and the cost can be reduced. it can.

  Further, the height of the resin cylinder head cover 402 can be suppressed, and even when the top plate portion 404b is horizontally attached to the cylinder head, the mounted OCV spool housing side faces downward. For this reason, the leaked hydraulic oil is surely discharged into the resin cylinder head cover 402, and leakage of hydraulic oil to the outside can be prevented more reliably.

[Embodiment 6]
The resin cylinder head cover 502 of the present embodiment is shown in the perspective view of FIG. In the present embodiment, the first storage recess 506 and the second storage recess 508 have the OCV mounting directions reversed and are completely stored inside the resin cylinder head cover 502. Other configurations are basically the same as those of the first embodiment.

According to the sixth embodiment described above, the following effects can be obtained.
(I). The effects (a) to (e) of the first embodiment are produced.
(B). If the effect of (4) of the fourth embodiment is produced and there is a space in the resin cylinder head cover 502, the resin cylinder head cover 502 capable of mounting the OCV can be provided by the configuration as in the present embodiment. Even if it exists, it can be prevented from changing the height.

[Other embodiments]
(A). In each of the above embodiments, the resin cap is joined to the housing recess by welding, but the resin cap may be fixed to the housing recess by other joining. For example, you may join by an adhesive agent. Or you may use both an adhesive agent and welding.

  (B). The first storage recess in FIG. 1 or both storage recesses in FIG. 14 are shown in a horizontal state. However, the actual OCV mounted here is in the OCV tip side, that is, the spool housing side is downward with respect to the horizontal plane. A resin cylinder head cover may be disposed on the cylinder head so as to be inclined. 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. Furthermore, the hydraulic oil that leaks between the sleeve, the housing recess, and the resin cap can also be reliably discharged into the cylinder head cover.

  (C). In each of the above embodiments, the resin cap is joined to the peripheral edge of the storage recess. However, the inner periphery of the resin cap only needs to be pressed against the cylindrical gasket to fix the sleeve. A resin cap may be joined to the resin cylinder head cover main body at a portion other than the portion.

FIG. 3 is a perspective view showing a main part of a cylinder head cover according to the first embodiment. The structure explanatory view showing the principal part of a cylinder head cover similarly. The disassembled perspective view of the principal part of a cylinder head cover similarly. The perspective view of the storage recessed part periphery of a resin cylinder head cover main body similarly. The structure explanatory drawing of a sleeve. The structure explanatory drawing of a cylindrical gasket similarly. Similarly, the structure explanatory drawing of OCV. The perspective view which shows the state which has similarly arrange | positioned the combination of a sleeve and a cylindrical gasket in the accommodation recessed part. The structure explanatory drawing of the 1st resin-made caps similarly. Similarly, a configuration explanatory view of a second resin cap. Similarly, the longitudinal cross-sectional view which shows the state which attached the resin-made cylinder head cover to the cylinder head. The perspective view which similarly shows the arrangement state and control system of OCV. The perspective view which shows the principal part of the resin-made cylinder head covers of Embodiment 2. FIG. FIG. 9 is a perspective view showing a main part of a resin cylinder head cover according to a third embodiment. FIG. 9 is a perspective view showing a main part of a resin cylinder head cover according to a fourth embodiment. FIG. 10 is a perspective view showing a main part of a resin cylinder head cover according to a fifth embodiment. FIG. 10 is a perspective view showing a main part of a resin cylinder head cover according to a sixth embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Resin cylinder head cover, 4 ... Resin cylinder head cover main body, 4a ... Inner surface, 4b ... Top plate part, 4c ... Outer surface, 6 ... 1st accommodation recessed part, 6a ... Peripheral part, 6b ... Insertion opening part, 6c, 6d ... Discharge oil passage, 6e ... supply oil passage, 8 ... second storage recess, 8a ... periphery, 8b ... insertion opening, 8c, 8d ... discharge oil passage, 8e ... supply oil passage, 10 ... first sleeve, 10a, 12a ... mounting hole, 10b, 12b ... OCV insertion end, 10c, 12c ... tapered surface, 12 ... second sleeve, 14, 16 ... cylindrical gasket, 14a, 16a ... gasket body, 18 ... first resin cap, 20 2nd resin cap, 22, 24 ... OCV, 22a, 24a ... Spool housing, 22b, 24b ... Electromagnetic solenoid, 22c, 24c ... O-ring, 26 ... Cap body, 26a ... Base end 28, connecting portion, 28a ... gasket, 30, 32 ... intermediate oil passage, 30a, 32a ... opening at the tip, 34, 36 ... draining oil passage, 37 ... supply oil passage, 38 ... cap body, 38a ... base Edge part 40 ... Connection part 40a ... Gasket 42, 44 ... Intermediate oil passage 42a, 44a ... Opening at the tip, 45, 46 ... Drain oil passage, 47 ... Supply oil passage, 48 ... Drain recess, 50 ... Cylinder head, 50a ... Hydraulic supply part, 52 ... Intake camshaft, 52a, 56a ... Oil passage, 52a ... Delay oil passage, 52b ... Advance oil passage, 54 ... Cam cap, 54a, 54b ... Cam cap oil passage 56 ... Exhaust camshaft, 56a ... Delay oil passage, 56b ... Advance oil passage, 58 ... Cam cap, 58a, 58b ... Cam cap oil passage, 60,62,63,64 ... Discharge oil passage, 66 ... Activation Hydraulic supply oil passage, 66a, 6b ... Distributing oil passage, 68 ... Hydraulic connector, 70, 72 ... Variable valve mechanism, 74 ... ECU, 102 ... Resin cylinder head cover, 104 ... Resin cylinder head cover body, 104b ... Top plate portion, 106 ... First storage recess , 108 ... second storage recess, 202 ... resin cylinder head cover, 204 ... resin cylinder head cover body, 204b ... top plate portion, 206 ... first storage recess, 208 ... second storage recess, 302 ... resin cylinder head cover, 304 ... resin cylinder head cover body, 304b ... top plate portion, 306 ... first storage recess, 308 ... second storage recess, 402 ... resin cylinder head cover, 404 ... resin cylinder head cover body, 404b ... top plate portion, 406 ... first Storage recess, 408 ... second storage recess, 502 ... resin cylinder head cover, 5 06 ... first storage recess, 508 ... second storage recess, g1, g2, g3, g4, g5 ... through hole, h1, h2 ... protrusion, p1, p2, p3, p4, p5 ... port, s1, s2, s3, s4, s5 ... oil holes.

Claims (6)

A resin cylinder head cover to which an oil control valve for controlling supply / discharge of operating hydraulic pressure to a variable valve mechanism of an internal combustion engine is mounted,
A resin cylinder head cover body that forms a storage recess and a part of the storage recess forms an insertion opening of the oil control valve;
The cylinder head cover body made of resin is made of a material that is higher in rigidity than the resin, and is disposed in the storage recess and has an internal space as a mounting hole, which is connected to a port of an oil control valve mounted in the mounting hole. A sleeve having oil holes for,
A resin cap for fixing the sleeve stored in the storage recess by covering the storage recess and being attached to the resin cylinder head cover body;
A cylinder head cover made of resin. 2. The resin cylinder head cover according to claim 1, wherein the sleeve is made of a metal material. 3. The resin product according to claim 1, wherein the housing recess is formed on an inner surface side of the resin cylinder head cover main body, and a part thereof is opened to an outer surface side as an insertion opening of an oil control valve. Cylinder head cover. 4. The resin cap according to claim 1, wherein the resin cap forms an oil hole or an oil passage for supplying and discharging hydraulic oil at a position corresponding to the oil hole provided in the sleeve. Resin cylinder head cover. 5. The resin cap according to claim 1, wherein the resin cap fixes the sleeve in the storage recess by being joined to a peripheral edge of the storage recess of the resin cylinder head cover body by welding. Resin cylinder head cover. The cylindrical gasket made of a rubber-like elastic body having an oil hole at a position corresponding to the oil hole provided in the sleeve is disposed in a compressed state on the outer periphery of the sleeve. A resin cylinder head cover characterized in that a seal is made between the sleeve, the housing recess and the resin cap.

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