KR101057254B1 - Cylinder Head Cover Assembly for Variable Valve Timing System - Google Patents

Abstract

The present invention relates to a cylinder head assembly in conjunction with an oil control mechanism in a variable valve timing system. In the cylinder head cover assembly for a variable valve timing system according to the present invention, an intake side bearing groove 210 and an exhaust side bearing groove 220 are formed in one body, and the journal of the intake and exhaust cam shafts 10 and 20 is provided. A cam cap 200 rotatably supporting the part; The cylinder head cover 100 mounted on the upper surface of the cylinder head while covering the intake and exhaust cam shafts 10 and 20 and the cam cap 200, and the upper surface and the inner surface of the cam cap 200 are in close contact with each other. It includes. The intake side oil control valve 51 and the exhaust side oil control valve 52 are inserted into the cylinder head cover 100, respectively; Inside the cam cap 200 and the cylinder head, the first introduction flow path 230 and the second introduction flow path 130 connecting the oil gallery of the cylinder head and the intake and exhaust side oil control valves 51 and 52. And the first intake side forward and second perception distribution passages 141 connecting the intake and exhaust side oil control valves 51 and 52 and the oil grooves 211 and 212 and 221 and 222 of the cam cap 200 again. 142 and the first exhaust side advance, crust distribution flow paths 151, 152 and the second intake side advance, crust distribution flow paths 241, 242 and the second exhaust side advance, crust distribution flow path ( 251 and 252 are formed.

Variable, Valve, Timing, Cam, Cap, Oil, Euro, Control, Valve, Cylinder, Head

Description

Cylinder Head Cover Assembly for Variable Valve Timing System

The present invention relates to a cylinder head assembly in connection with an oil control mechanism in a variable valve timing system. More particularly, an oil control valve supplied to a cam phase variable mechanism is disposed in a cylinder head cover, and a flow path associated with the cylinder head is provided. A cylinder head cover assembly for a variable valve timing system realized in a form suitable for a cover and a cam cap.

The variable valve timing system may be configured to change the rotation phase of the intake cams or the intake and exhaust cams, or to provide a cam shaft with a low speed cam and a high speed cam separately, and then to match the phase of the cam with the rotational speed. By changing the cam shape or changing the lift of the valve together with the cam phase, the device optimizes the valve timing according to the operating state (load, rotational speed, etc.) of the engine.

In such a variable valve timing system, a cam phase variable mechanism consisting of a helical gear type, a torsional spline type, a vane type, or an electrohydraulic type or the like is provided at the front end portion of the cam shaft, and the ECU ( An oil control valve (OCV) is controlled by an engine control unit to control the direction and flow rate of oil supplied to the cam phase variable mechanism to operate the phase variable mechanism.

Variable valve timing systems include Variable Camshaft Timing (VCT), Dual Variable Camshaft Timing (DVCT), Variable Cam Phaser (VCP), Dual Variable Cam Phaser (DVCP), Variable Valve Timing (VVT), and Continuously Variable Valve Timing (CVVT). And various valve names, such as Variable Valve Timing & Lift Electronic Control System (VTEC).

Various examples of the variable valve timing system or apparatus or apparatuses used therefor are disclosed in Korean Patent Application Laid-Open No. 2003-0084642, Korean Patent Application Laid-Open No. 1999-0058241, and Korean Patent Publication No. 10-2007-0033874 , Registered Patent Publication No. 10-0461937, Registered Patent Publication No. 10-0265982, Registered Patent Publication No. 10-0674689, Registered Patent Publication No. 10-0620984, Registered Patent Publication No. 10-0296758 And the like.

As can be seen from the above publications, the variable valve timing system installs a cam shaft on the upper surface of the cylinder head constituting the combustion chamber above the engine block, and the cam shaft is also referred to as a cam cap ('bearing cap'). Is rotatably supported. The upper head of the cam shaft and the cam cap is covered with a cylinder head cover.

And the cam phase variable mechanism is installed at the end of the cam shaft, the side of the cylinder head is composed of the oil circuit of the engine lubrication device and the oil control valve associated with the cam phase variable mechanism is installed. Accordingly, the pressure of the oil supplied from the oil pump is adjusted by the oil control valve and selectively supplied to the advanced side chamber or the retarded side chamber of the cam phase shift mechanism. The rotational phase is changed (advanced or perceived), and as a result, the opening and closing timing of the valve opened and closed by the rotation of the cam shaft is adjusted.

By the way, in the conventional variable valve timing system, since the flow path connected to the cam phase variable mechanism is formed in the cylinder head, and the oil control valve is provided on the side of the cylinder head, the design and maintenance of the engine room are limited. Gives.

In short, the oil control valve installed on the side of the cylinder head protrudes from the cylinder head. To avoid this, the engine is optimized by restricting the arrangement of various auxiliary equipment, fuel circuit, cooling circuit, ignition circuit and control circuit installed in the engine room. The disadvantage is that the design of the room is limited and the location of the oil control valve is limited.

In addition, since the oil control valve is disposed deeply inward from the top cylinder head cover, it is difficult to enter the tool, which significantly reduces maintenance and assembly.

The present invention has been invented to solve the above problems, by arranging the oil control valve on the cylinder head cover, and by opening the appropriate type of flow path in the cam cap and the cylinder head cover to enable this, It is an object of the present invention to provide a cylinder head cover assembly for a variable valve timing system that facilitates positioning, increases freedom in engine room design, and improves maintainability and assembly.

In order to achieve the above object, the cylinder head cover assembly for a variable valve timing system according to the present invention, the cam phase is provided at the end of the intake cam shaft and the exhaust cam shaft by the intake side oil control valve and exhaust side oil control valve. A cylinder head cover assembly for a variable valve timing system for controlling and supplying pressure and direction of oil supplied to a variable mechanism, wherein an intake side bearing groove and an exhaust side bearing groove are formed in one body, and the intake side bearing groove An intake side advance and a crust oil groove connected to the intake side cam phase variable mechanism are formed, and the exhaust side bearing groove is formed with an exhaust side advance and a crust oil groove connected to the exhaust side cam phase variable mechanism. Is fixed to the upper surface of the cylinder head in a state rotatably supporting the journal portion of the exhaust cam shaft. Cam cap; And a cylinder head cover mounted on an upper surface of a cylinder head so as to cover the intake and exhaust cam shafts and a cam cap, and the upper surface and the inner surface of the cam cap closely contact each other. The intake side oil control valve and the exhaust side oil control valve are respectively provided in a valve insertion hole formed in the cylinder head cover; On the inner side of the cam cap, a first introduction flow path is formed in communication with the oil gallery of the cylinder head extending toward the cylinder head cover; A second introduction flow path formed at one inner side of the cylinder head cover and communicating with the first introduction flow path of the cam cap and extending to the valve insertion holes at both sides thereof; On the other side of the cylinder head cover, the first intake side extending to the upper surface of the cam cap in communication with the advance oil outlet and the perceptual oil outlet of the intake side oil control valve and the exhaust side oil control valve. An advancing, perceptual distribution flow path and a primary exhaust-side advancing and perception distribution flow path are formed; On the other side of the cam cap, the first intake side of the cylinder head cover, the second intake side, the crust distribution flow path connecting the intake side and the crust oil groove, the second intake side, And a secondary exhaust side advance and a crust distribution passage connecting the primary exhaust side advance and the crust distribution flow path and the exhaust side advance and the crust oil groove of the cylinder head cover.

In the present invention described above, the first introduction flow path of the cam cap includes a vertical flow path connected to an oil gallery of the cylinder head, a transverse flow path extending laterally from the vertical flow path to a middle portion of the cam cap, and the transverse flow path. And an outlet flow path extending upward from the cylinder head cover.

In the present invention described above, the second introduction flow path of the cylinder head cover includes a connection flow path connected to the first introduction flow path of the cam cap, and the cylinder head cover toward the valve insertion holes on both sides from the connection flow path. A common channel extending laterally; The inlet-side valve insertion hole and the exhaust-side valve insertion hole may be branched from the common flow passage, respectively, and may be configured as an intake-side branch passage and an exhaust-side branch passage for supplying oil to the oil control valve provided in the valve insertion hole.

According to the cylinder head cover assembly for the variable valve timing system of the present invention, the oil control valve is disposed on the cylinder head cover, and the oil gallery of the cylinder head and the oil control valve, the oil control valve and the cam by using the cam cap and the cylinder head cover. The flow path leading to the shaft is realized with a simple structure.

According to the present invention, since the oil control valve can be installed on the top of the engine and the top of the engine room without interfering with various auxiliary devices and facilities disposed in the engine room, the freedom in designing the engine room is increased and optimized. You can implement the engine.

In addition, since the oil control valve is disposed at the top of the engine and the engine room instead of being disposed deeply below the engine room, maintenance and assembly are improved.

In addition, the position of the oil control valve can be easily changed only by changing the direction and the position of the flow path of the cylinder head cover or the cam cap.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show the outside and inside of a cylinder head cover assembly according to the invention.

As shown in FIG. 1, in the cylinder head assembly for the variable valve timing system of the present invention, the intake side oil control valve 51 and the exhaust side oil control valve 52 are disposed on both sides of the cylinder head cover 100, respectively. In the form of

The intake side oil control valve 51 controls the pressure and direction of oil to be supplied to the intake cam phase variable mechanism provided in the intake cam shaft, and the exhaust side oil control valve 52 is variable in the exhaust cam phase installed in the exhaust cam shaft. Control the pressure and direction of oil to be supplied to the instrument.

The cylinder head cover 100 is coupled to a cylinder head (not shown) by bolts 101. As will be appreciated, a camshaft (not shown) is disposed inside the cylinder head cover 100. The cam shaft is rotatably installed on the upper surface of the cylinder head by the support of the cam cap 200 (see FIG. 2), and at its front end, a cam phase variable mechanism (not shown) and a cam pulley (not shown) are provided. Is installed.

Since the cylinder head cover 100 constitutes the uppermost part of the engine, the oil control valves 51 and 52 are assembled with the uppermost part of the engine exposed. Therefore, according to the present invention, the selection and the change of the installation positions of the oil control valves 51 and 52 become more free. When the oil control valves 51 and 52 are deeply inserted into the cylinder head portion under the cylinder head cover 100 as in the related art, not only the serviceability of the oil control valves 51 and 52 is lowered, but also the engine is directly connected to the engine. Since the installation position of the auxiliary equipment to be attached or the apparatus or parts arranged adjacent to the engine is restricted, the position is limited to almost one point, and the optimization design of the engine room or the design change for the optimization is limited. In the present invention, since the oil control valves 51 and 52 are disposed on the top of the cylinder head cover 100, the possibility of overlapping with other components is small, and the space is open upward, whereby the positions of the oil control valves 51 and 52 are opened. Can be selected relatively freely. In this case, the cylinder head cover 100 should be formed with a flow path supplied to the oil control valves 51 and 52 and a flow path distributed from the oil control valves 51 and 25 as appropriate. The concrete structure of a flow path is mentioned later. Reference numeral '102' in Figure 1 is a 'bolt' for fixing the cam cap to be described later.

2 is a perspective view showing the cam head 200 separated from the cylinder head cover 100 as viewed from the inside by inverting the cylinder head cover of FIG. 1.

The oil control valves 51 and 52 installed in the cylinder head cover 100 adjust the pressure of the oil supplied from the oil pump to distribute the cam phase variable mechanism of the cam shaft. In the present invention, the oil control valves 51 and 52 are installed in the cylinder head cover 100 by adopting a configuration in which the introduction flow path and the distribution flow path are directly connected to the cylinder head cover 100 and the cam cap 200, respectively. In addition to enabling this, the configuration is simplified.

The cam cap 200 has a shape in which an intake side bearing groove 210 and an exhaust side bearing groove 220 for rotatably supporting a journal part of the intake and exhaust cam shafts are formed in one body.

The inlet side bearing groove 210 is provided with a true oil groove 211 and a crust oil groove 212, and similarly, the exhaust side bearing groove 210 has an acute oil groove 221 and a crust oil groove 222. ) Is formed. Oil is introduced into each of the oil grooves 211 and 221 (212 and 222) through the second distribution passages 241 and 242 and 251 and 252, and oil grooves 211 and 221 (212 and 222). Is supplied to the advance chamber and the perception chamber of the cam phase variable mechanism through the advance passage and the perception passage formed in the cam shaft.

In addition, the cam cap 200 includes oil supplied from the oil pump (that is, oil flowing into the cam cap 200 through the oil gallery of the cylinder block and the cylinder head by the oil pump) toward the cylinder head cover 100. The first introduction flow path 230 for sending is formed.

The first, second and third bosses of the cylinder head cover 100 to be in close contact with the upper surface of the cam cap 200 (upper surface in the engine installed state, which is the lower surface of the cam cap 200 in FIG. 2). Bosses 111, 112, and 113 are formed, and the first, second, and third bosses 111, 112, and 113 are formed with flow paths that are connected (communicate) with the flow paths of the cam cap 200.

In detail, the second boss flow passage 130 is connected to the first boss flow passage 230 of the cam cap 200 in the first boss 111 of the cylinder head cover 100. The second boss 112 has a first intake side advance distribution passage connected to the second intake side advance distribution channel 241 and the second intake side perception distribution channel 242 of the cam cap 200. 141 and the first intake-side crust distribution passage 142 are formed. The third boss 113 has a first exhaust side advance distribution to be connected to the secondary exhaust side advance distribution channel 251 of the cam cap 200 and the second exhaust side perception distribution channel 252. The flow path 151 and the primary exhaust-side crust distribution flow path 152 are formed.

In the present specification, three bosses 111, 112, and 113 are shown and described in a form in which each boss is independently formed, but one long boss is formed in a form of connecting three bosses, and three kinds of bosses are formed therein. It is good also as a structure which formed the flow path of the form.

3 to 6 show a specific configuration of the cam cap 200 described above. FIG. 3 is a perspective view, FIG. 4 is a view showing the configuration of the flow channel, FIG. 5 is a cross sectional view of the configuration of the introduction channel of FIG. 4, and FIG. 6 is a cross sectional view of the configuration of the distribution channel of FIG. 4.

As shown in Figures 3 and 4, the cam cap 200 originally serves as a bearing block to rotatably support the intake cam shaft 10 and the exhaust cam shaft 20, according to the present invention the cylinder head And the role of the oil passage between the oil control valves 51 and 52 of the cylinder head cover 100, and the role of the oil passage between the oil control valves 51 and 52 and the cam shafts 10 and 20. do.

The cam cap 200 inserts bolts into four bolt holes 201 and fixes them to the cylinder head side, and the bolts inserted from the cylinder head cover 100 are fastened to the bolt holes 202 so that the cylinder head cover 100 is secured. Close contact with.

The intake side bearing groove 210 of the cam cap 200 rotatably supports the intake cam shaft 10, and the exhaust side bearing groove 220 rotatably supports the exhaust cam shaft 20.

See FIGS. 4 and 5. FIG. 5 is a cross-sectional view based on the first introduction channel 230 of FIG. 4. As shown in FIGS. 4 and 5, the first introduction flow path 230 is a vertical flow path 231 connected to the oil gallery of the cylinder head and transversely from the vertical flow path 231 to the middle portion of the cam cap 200. It consists of a transverse flow path 232 which extends and an outlet flow path 233 which extends upward from a transverse flow path 232 toward a cylinder head cover. The transverse flow path 232 is drilled with a tool such as a drill from the outside of the side end of the cam cap 200 mainly for the convenience of processing. In this case, since the transverse flow path 232 is opened to the outside as shown in the figure, the plug 203 (see Fig. 11) or the like is inserted into the side end surface of the transverse flow path 232 to block the plug. In the present embodiment, to simplify the configuration, the first introduction flow path 230 is configured in the form of a vertical flow path 231, a transverse flow path 232, and an outlet flow path 233, but the first introduction flow path 230 is illustrated. ) Is not limited thereto, and the oil gallery of the cylinder head and the second introduction flow path 130 of the cylinder head cover 100 need only be connected to each other, and thus may be configured in various forms in consideration of conditions such as workability. have.

See FIGS. 4 and 6. FIG. 6 is a cross-sectional view based on the second intake side advance distribution channel 241 of FIG. 4. As shown in Figs. 4 and 6, the second intake side advance distribution channel 241 has an upper portion connected to the first intake side advance distribution channel 141 of the cylinder head cover 100, and the lower portion thereof is It is connected to the intake side advance oil groove 211 of the intake side bearing groove 210. When the primary intake side advance distribution channel 141 is opened from the intake side oil control valve 51 provided in the cylinder head cover 100, the oil is discharged from the primary intake side advance distribution channel 141 to the second. The secondary intake side advance distribution channel 241 is introduced into the intake side advance oil groove 211 and is supplied to the intake side cam phase variable mechanism along a groove formed on the outer periphery of the intake cam shaft 10 and an oil passage therein. .

The second intake side crust distribution flow path 242 has an upper portion connected to the first intake side crust distribution flow path 142 of the cylinder head cover 100, and a lower portion thereof has an intake air of the intake side bearing groove 210. It is connected to the side trough oil groove 212.

Similarly, in the exhaust side, the second exhaust side advance distribution channel 251 has an upper portion connected to the primary exhaust side advance distribution channel 151 of the cylinder head cover 100, and the lower side has an exhaust side bearing groove ( 220 is connected to the exhaust-side deep oil oil groove 221. In addition, the second exhaust side crust distribution flow path 252 has an upper portion connected to the first exhaust side crust distribution flow path 152 of the cylinder head cover 100, and a lower portion thereof has an exhaust side bearing groove 220. Is connected to the exhaust-side crust oil groove 222.

Next, FIGS. 7 and 8 show the shape of the introduction flow path of the cylinder head cover 100. FIG. 7 is a cross-sectional view taken along the line A-A of FIG. 1, and FIG. 8 is a cross-sectional view taken along the line C-C of FIG. See FIG. 2 and FIG. 4 in parallel.

As shown in FIGS. 7 and 8, the second introduction flow path 130 of the cylinder head cover 100 includes the connection flow path 131, the common flow path 132, and the intake and exhaust side branch flow paths 133 and 134. )

The second introduction flow path 130 is configured to supply the oil flowing from the outlet 233 of the first introduction flow path 230 of the cam cap 200 to the intake side oil control valve 51 and the exhaust side oil control valve ( 51) to act as an intermediary passageway.

Intake side oil control valves 51 (see FIG. 11) and exhaust side oil control valves 52 (see FIG. 11) are provided in the valve insertion holes 121 and 122 on both sides of the cylinder head cover 100, respectively.

The connection passage 131 is connected to the outlet 233 (see FIG. 4) of the first introduction passage 230 of the cam cap 200.

The common passage 132 extends in the lateral direction of the cylinder head cover 100 toward the valve insertion holes 121 and 122 on both sides from the connection passage 131. The common flow path 132 is drilled in such a manner as to penetrate the cylinder head cover 100 laterally using a tool such as a drill mainly for convenience of processing. In this case, since both ends of the common flow path 132 are opened to the outside as shown in the drawing, the plug 135 or the like is inserted into the end surface of the common channel 132 to prevent the plug.

The intake side branch passage 133 and the exhaust side branch passage 134 branch from the common passage 132 to the intake side valve insertion hole 121 and the exhaust side valve insertion hole 122, respectively, and the valve insertion hole 121 is formed. Oil is supplied to the oil control valves 51 and 52 (see FIG. 11) provided at 122.

In the present embodiment, to simplify the configuration, the second introduction passage 130 is configured in the form of the connection passage 131, the common passage 132 and the branch passage 133, but the second introduction passage 130 ) Is not limited to this, and since only the first introduction flow path 230 and the oil control valves 51 and 52 of the cam cap 200 are connected to each other, various shapes are considered in consideration of conditions such as workability. Can be configured.

Next, FIG. 9 is a cross-sectional view taken along the line BB of FIG. 1, illustrating a distribution flow path of the cylinder head cover 100, and FIG. 10 is a cross-sectional view taken along the line DD of FIG. 9, and the cam cap 200 is assembled. The distribution flow path of the cylinder head cover 100 and the distribution flow path of the cam cap 200 are shown in the connected state. See FIG. 2 and FIG. 4 in parallel.

9 and 10, from the intake side valve inserting hole 121, a first intake side advance distribution channel 141 and a first intake side perception distribution channel 142 are formed. From the exhaust valve insertion hole 122, a primary exhaust side advance distribution channel 151 and a primary exhaust side perceptual distribution channel 152 are formed.

In the assembled state, the cam cap 200 and the cylinder head cover 100 are in close contact with each other, and the first intake-side advancing and perceptual distribution passages 141 and 142 of the cylinder head cover 100 are connected to the cam cap 200. The secondary intake-side advancing and perceptual distribution passages 241 and 242 are connected, and the primary exhaust-side advancing and perceptual distribution passages 151 and 152 are the secondary exhaust-side advancing and perceptual distribution passages 251. 252).

The assembly state of the cylinder head cover assembly for a variable valve timing system of the present invention made as described above is the same as in FIGS. 11 and 12. FIG. 11 is a cross-sectional view taken along the line E-E of FIG. 10, and FIG. 12 is a cross-sectional view taken along the line F-F of FIG. 10. See FIG. 10 in parallel.

10 and 11, the oil supplied to the oil gallery of the cylinder head by the oil pump of the engine enters the vertical flow path 231 of the first introduction flow path 230 of the cam cap 200. It exits to the exit flow path 233 via the transverse flow path 232. From the outlet flow path 233, the connection flow path 131 of the second introduction flow path 130 of the cylinder head cover 100 enters, and is divided into both sides of the common flow path 132, and then the intake side branch flow path ( 133 and an exhaust side branch passage 134 enter the intake side oil control valve 51 and the exhaust side oil control valve 52.

As shown in FIGS. 10 and 12, the pressure-controlled oil in the intake side oil control valve 51 may be a first intake side advance distribution channel 141 or a first intake side perception distribution channel 142. Is selectively discharged.

The oil from the first intake side advance distribution channel 141 of the cylinder head cover 100 passes through the second intake side advance distribution channel 241 of the cam cap 200 to the intake side advance oil groove ( 211), thereby operating the intake side cam phase variable mechanism in the forward direction.

The oil from the primary intake side crust distribution flow path 142 of the cylinder head cover 100 passes through the second intake side crust distribution flow path 242 of the cam cap 200. 212), thereby operating the intake side cam phase variable mechanism in the perceptual direction.

Similarly, the pressure-controlled oil in the exhaust side oil control valve 52 is selectively discharged into the primary exhaust side advance distribution channel 151 or the primary exhaust side perceptual distribution channel 152.

The oil from the primary exhaust side advance distribution channel 151 of the cylinder head cover 100 passes through the secondary exhaust side advance distribution channel 251 of the cam cap 200 to the exhaust side advance oil groove ( 221 is supplied. As a result, the exhaust side cam phase variable mechanism is operated in the forward direction.

The oil from the primary exhaust-side crust distribution channel 152 of the cylinder head cover 100 passes through the secondary exhaust-side crust distribution channel 252 of the cam cap 200. 222 is supplied. Thereby, the exhaust side cam phase variable mechanism is operated in the perceptual direction.

As described above, the cylinder head cover assembly for the variable valve timing system of the present invention provides an optimal new structure in which the oil control valve can be placed on the cylinder head cover.

Therefore, when the present invention is applied to an automobile, the degree of freedom in the design of the engine room is increased, so that an engine, an engine room, and an automobile having excellent performance and efficiency and excellent maintainability and assembly can be realized.

1 is an overall perspective view of a cylinder head cover assembly showing an installation structure of an oil control valve according to the present invention.

FIG. 2 is a perspective view showing the cam head removed from the cylinder head cover by inverting the cylinder head cover of FIG. 1 and viewed from the inside. FIG.

3 is a perspective view of a cam cap according to the present invention.

It is a figure which shows the structural state of the flow path of the cam cap of FIG.

5 is a cross-sectional view of the configuration of the introduction channel of FIG.

6 is a cross-sectional view of the configuration of the distribution channel of FIG. 4.

7 is a cross-sectional view taken along the line A-A of FIG. 1 showing the shape of the introduction flow path of the cylinder head cover according to the present invention.

8 is a cross-sectional view taken along the line C-C of FIG.

FIG. 9 is a cross-sectional view taken along line B-B of FIG. 1 and illustrating a distribution flow path of the cylinder head cover.

FIG. 10 is a cross-sectional view taken along the line D-D of FIG. 9, illustrating a distribution channel of the cylinder head cover and a distribution channel of the cam cap in a state where the cam cap is assembled.

FIG. 11 is a cross-sectional view taken along the line E-E of FIG. 10 and illustrates a connection state between an introduction flow path of the cam cap and the cylinder head cover and an oil control valve.

FIG. 12 is a cross-sectional view taken along the line F-F in FIG. 10 and showing a connection state between the cylinder head cover and the distribution channel of the cam cap.

<Explanation of symbols for the main parts of the drawings>

10: intake cam sharp 20: exhaust cam shaft

51: intake side oil control valve 52: exhaust side oil control valve

100: cylinder head cover 101, 102: bolt

111: first boss 112: second boss

113: third boss 121: intake valve insertion hole

122: exhaust valve insertion hole 130: the second introduction flow path

131: connection euro 132: common euro

133: intake side branch flow path 134: exhaust side branch flow path

135, 203: Plug 141: Distribution channel for primary intake side advance

142: distribution channel for the first intake-side crust 151: distribution channel for the first exhaust-side crust

152: distribution channel for the first exhaust side crust 200: cam cap

210: intake side bearing groove 211: intake side advance oil groove

212: oil groove for intake side crust 220: exhaust side bearing groove

221: oil groove for exhaust side exhaust 222: oil groove for exhaust side earthquake

230: first introduction flow path 231: vertical flow path

232: cross direction oil 233: exit

241: distribution channel for secondary intake side advance 242: distribution channel for secondary intake side

251: distribution channel for secondary exhaust side advance 252: distribution channel for secondary exhaust side

Claims (5)

The pressure and direction of oil supplied to the cam phase variable mechanism provided at the end of the intake cam shaft 10 and the exhaust cam shaft 20 by the intake side oil control valve 51 and the exhaust side oil control valve 52 are adjusted. A cylinder head cover assembly for a variable valve timing system for regulating feeding An intake side bearing groove 210 and an exhaust side bearing groove 220 are formed in one body, and the intake side bearing groove 210 has an intake side advance and a tectonic oil groove connected to the intake side cam phase variable mechanism. 211 and 212 are formed, and the exhaust side bearing grooves 220 are provided with exhaust side advance and perception oil grooves 221 and 222 which are connected to the exhaust side cam phase variable mechanism. 10) a cam cap 200 fixed to the upper surface of the cylinder head in a state rotatably supporting the journal portion of (20); And The cylinder head cover 100 mounted on the upper surface of the cylinder head while covering the intake and exhaust cam shafts 10 and 20 and the cam cap 200, and the upper surface and the inner surface of the cam cap 200 are in close contact with each other. Including; The intake side oil control valve 51 and the exhaust side oil control valve 52 are respectively installed in the valve insertion holes 121 and 122 formed in the cylinder head cover 100, On the inner side of the cam cap 200, a first introduction flow path 230 is formed in communication with the oil gallery of the cylinder head extending toward the cylinder head cover 100, On the inner side of the cylinder head cover 100, the second introduction introduced in communication with the first introduction flow path 230 of the cam cap 200 to extend the valve insertion holes 121, 122 of both sides Flow path 130 is formed, On the other side of the inside of the cylinder head cover 100, the cam cap in communication with the advance oil outlet and the crust oil outlet of the intake side oil control valve 51 and the exhaust side oil control valve 52. First intake-side advancing, crust distribution channels 141 and 142 and a first exhaust-side advancing, crust distribution channels 151 and 152 extending up to an upper surface of 200; On the other side of the inside of the cam cap 200, the primary intake side of the cylinder head cover 100, the intake distribution paths 141 and 142 and the intake side of the intake, crust oil grooves 211, 2nd intake side advance and perception distribution flow paths 241 and 242 connecting 212, and 1st exhaust side advance and exhaust distribution paths 151 and 152 and exhaust side of the cylinder head cover 100. A secondary exhaust-side inlet, crust distribution flow passage (251, 252) for connecting the inlet and inward oil grooves (221, 222) is formed, the cylinder head cover assembly for a variable valve timing system. The method of claim 1, The first introduction flow path 230 of the cam cap 200, A vertical flow path 231 connected to the oil gallery of the cylinder head; A transverse flow path 232 extending laterally from the vertical flow path 231 to a middle portion of the cam cap 200; And A cylinder head cover assembly for a variable valve timing system, characterized in that it comprises an outlet flow passage (233) extending upward from the transverse flow passage (232) toward the cylinder head cover (100). The method of claim 2, The transverse flow path 232 is bored outside the side end of the cam cap 200, the cylinder head for the variable valve timing system, characterized in that the plug 203 is inserted into the hole in the perforated side end surface. Cover assembly. The method of claim 1, The second introduction flow path 130 of the cylinder head cover 100, A connection passage 131 connected to the first introduction passage 230 of the cam cap 200; A common flow passage 132 extending in the lateral direction of the cylinder head cover 100 from the connection flow passage 131 toward the valve insertion holes 121 and 122 on both sides; And Branched from the common passage 132 to the intake valve insertion hole 121 and the exhaust valve insertion hole 122, respectively, to the oil control valves 51 and 52 provided in the valve insertion holes 121 and 122. A cylinder head cover assembly for a variable valve timing system, comprising an intake side branch passage 133 and an exhaust side branch passage 134 for supplying oil. 5. The method of claim 4, The common flow path 132 is formed to penetrate the cylinder head cover 100 in the lateral direction, and the plug 135 is inserted into both ends of the common flow path 132 for the variable valve timing system Cylinder head cover assembly.

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