JPH05280604A - Tensioner device of engine - Google Patents

Abstract

PURPOSE:To miniaturize a cylinder head and to decrease the number of parts by arranging a cam chain tensioner at the inner part of a cam chain, and by providing a cylinder head fitting boss portion and an intermediate shaft fitting boss portion on a tensioner main body, so that an inermediate shaft may be supported in cooperation with the cylinder head. CONSTITUTION:A cam chain tensioner 68 is fitted to a tensioner main body 74 by means of a cylinder head fitting boss portion 82 of a cylinder head 12 located at the inner most side surrounded by a cam chain 62. And an intermediate shaft fitting boss portion 84 to be fitted to an intermediate fitting bolt 46 of an intermediate shaft 44 is provided. That is, the intermediate shaft fitting boss portion 84 is provided on one tip of the tensioner 74 as well as triangular frame-shaped cylinder head fitting boss portions 82, 82 are provided on two tips of the tensioner 74. Thereby, the cam chain tensioner is supported with the intermediate shaft 44, the tensioner main body 74 and the cylinder head 12 so that a thrust washer may be no more necessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tensioner device for an engine, and more particularly, it can enhance the support rigidity of an intermediate shaft and reduce the contact surface of the intermediate shaft with a cylinder head.
The present invention relates to an engine tensioner device that can downsize a cylinder head and reduce the number of parts.

[0002]

2. Description of the Related Art As an engine of a vehicle, there are an engine having cylinders arranged in series, an engine having cylinders opposed to each other, an engine having cylinders arranged in a V shape, and the like. The engine with the cylinders arranged in a V-shape has one side and the other side of the V-shaped cylinder block.
The cylinder heads are mounted on one side and the other side, respectively.
In such an engine, one side first and second cam shafts for intake and exhaust are respectively pivotally supported on one side cylinder head and two intake and exhaust sides are respectively supported on the other side cylinder head. The other side first and second cam shafts are pivotally supported, and the rotation of the crank shaft pivotally supported by the cylinder block is rotated by the timing chain and the one side and other side cam chains via the intermediate shaft. -There are those that are driven by being transmitted to the second cam shaft and the first and second cam shafts on the other side.

As such a tensioner device for an engine, Japanese Patent Application Laid-Open Nos. 1-18241 and 2-169 have been used.
809, JP-A-2-2111307, and JP-A-3-81509. The one disclosed in JP-A-1-18241, JP-A-2-169809, and JP-A-2-211307 discloses a cam chain for one side and the other side of an engine in which a cylinder is arranged in a V shape. One side and the other side cam chain tensioners are arranged on the outer side, respectively. In addition, JP-A-3
No. 81509 discloses a cylinder with a
One side and the other side cam chain tensioners are arranged on the inner sides of the one side and the other side cam chains, respectively, which are arranged in a V shape.

Further, as an engine tensioner device, there is one shown in FIGS. 9 and 10. In the figure, 10
2 is an engine. This engine 102 mounts one-side / other-side cylinder heads 110 and 112 on two one-side / other-side cylinder banks 106 and 108 of a V-shaped cylinder block 104, respectively. 110/112 to one side / other side head cover 114
・ 116 is attached. At the bottom of the cylinder block 104 of the engine 102, the bearing cap 11
8 is attached and an oil pan (not shown) is attached. Reference numeral 120 is an oil pump.

The engine 102 includes a cylinder block 10
4, a crank sprocket 124 is attached to one end of the crank shaft 122 axially supported by the bearing cap 118 in the axial direction. The one side cylinder head 110 and the other side cylinder head 112 are provided with one side first and second cam shafts 126 and 128 and the other side first and second cam shafts 130 and 132, respectively. There is. The one-side first and second cam shafts 126 and 128 are provided with one-side first and second cam sprockets 134 and 136 respectively attached to the other ends in the axial direction. The other-side first and second cam shafts 130 and 132 are provided with the other-side first and second cam sprockets 138 and 140 respectively attached to one end side in the axial direction.

The one side first and second cam shafts 126 and 128
On the other hand, in the drawing, the one side first cam shaft 126 for intake is provided with a one side intermediate sprocket 142 having a diameter larger than that of the crank sprocket 124 attached to one end side in the axial direction. An intermediate shaft 144 is attached to one end of the other cylinder head 112 in the axial direction by an intermediate shaft mounting bolt 146. On the intermediate shaft 144, the other side intermediate sprocket 148 and the other side cam sprocket 15 are provided.
The axis 0 is provided. The other-side intermediate sprocket 148 and the other-side cam sprocket 150 are integrally provided and pivotally supported by the intermediate shaft 144.

The cylinder block 104 has one side
The idle shaft 152 is mounted between the other side cylinder banks 106 and 108 and attached to one end side in the axial direction with an idle shaft mounting bolt 154. This idle axis 1
52 is provided with an idle sprocket 156 that is axially supported.

The crank sprocket 124, one side intermediate sprocket 142 and the other side intermediate sprocket 14
8 and the idle sprocket 156, a timing chain 158 is wound and provided. The one side cam chain 160 is wound around the one side first and second cam sprockets 134 and 136. The other side cam chain 162 is wound around the other side first and second cam sprockets 138 and 140 and the other side cam sprocket 150.

The timing chain 158 is provided with a timing tensioner 164 that applies a constant tension. The one-sided cam chain 160 and the other-sided cam chain 162 are provided with a one-sided cam chain tensioner 166 and another-sided cam chain tensioner 168 that give a constant tension. Reference numeral 170 is a timing guide that guides the timing chain 158. Further, reference numeral 172 is a chain cover.

[0010]

By the way, as shown in FIG.
In the tensioner device for the engine 102 shown in FIG. 10, the other-side intermediate sprocket 148 and the other-side cam sprocket 150 are pivotally supported on the intermediate shaft 144 attached to the other-side cylinder head 112. This intermediate shaft 14
4 is an intermediate shaft mounting bolt 1 for the other side cylinder head 112.
It is attached by cantilever support by 46.

However, the intermediate shaft 144 is deformed by the tension acting from the timing chain 158 and the other side cam chain 162, and the other side intermediate sprocket 148.
Also, smooth rotation of the sprocket 150 for the other cam may be impeded. Therefore, there is a disadvantage that the area of the contact surface 144A with respect to the other side cylinder head 112 of the intermediate shaft 144 must be increased in order to increase the support rigidity. Further, it is possible to increase the rigidity by providing an intermediate shaft support bracket for supporting the intermediate shaft 144, but there is a disadvantage that the number of parts increases.

Also, the cam chain tensioner 168 on the other side
Is attached to the other side cylinder head 112 on the outer side of the other side cam chain 162. Therefore, the other side cylinder head 112 must secure the mounting surface 168A to which the other side cam chain tensioner 168 is mounted.
Only the mounting surface 168A is projected outward and there is the inconvenience of increasing the size. Moreover, this mounting surface 16
8A is provided so as to project to the space S side between the one-side and the other-side cylinder heads 110 and 112, so that the space S in which parts such as the intake manifold are arranged is reduced, and the space S is effectively used. There is an inconvenience that cannot be obtained.

Further, the other side intermediate sprocket 148 and the other side cam sprocket 1 pivotally supported by the intermediate shaft 144.
The 50 requires a thrust washer 174 which is a thrust support member for supporting the thrust force by applying the thrust force. Therefore, there is an inconvenience that the number of parts increases.

[0014]

Therefore, in order to eliminate the above-mentioned inconvenience, the present invention is provided with a crank sprocket mounted on a crankshaft which is pivotally supported by a cylinder block of an engine, and is pivotally supported by a cylinder head of the engine. First and second cam sprockets are attached to the first and second cam shafts respectively, and an intermediate sprocket and a cam sprocket are axially supported by an intermediate shaft attached to the cylinder head. An engine provided with a timing chain wound around the sprocket and a cam chain wound around the first and second cam sprockets and the cam sprocket, and provided with a cam chain tensioner for applying a constant tension to the cam chain. In the tensioner device, the cam chain tensioner And a cylinder head mounting boss that is mounted to the cylinder head on the inner side of the cam chain with a tensioner mounting bolt on the tensioner body of the cam chain tensioner. An intermediate shaft mounting boss that can be mounted on the mounting bolt is provided.

[0015]

According to the structure of the present invention, in the engine tensioner device, the cam chain tensioner is disposed on the inner side of the cam chain, so that it is not provided so as to project outward from the cylinder head. In addition, the tensioner body of the cam chain tensioner is provided with a cylinder head mounting boss that is mounted on the cylinder head on the inner side of the cam chain with a tensioner mounting bolt, and an intermediate shaft mounting boss that is mounted on the intermediate shaft mounting bolt of the intermediate shaft. By providing the portion, the intermediate shaft can be supported by the tensioner body of the cam chain tensioner and the cylinder head. If the intermediate sprocket that is axially supported by the intermediate shaft and the thrust support that supports the thrust force of the cam sprocket are integrally provided on the intermediate shaft mounting boss of the tensioner body of the cam chain tensioner, the intermediate sprocket Also, the thrust washer, which is the thrust supporting member of the cam sprocket, can be eliminated.

[0016]

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 7 show a first embodiment of the present invention. 1 and 2, reference numeral 2 is an engine. This engine 2 has a V-shaped cylinder block 4
The two one-side / other-side cylinder banks 6 and 8 are respectively equipped with the one-side and other-side cylinder heads 10 and 12, and the one-side and the other-side cylinder heads 10 and 12 are provided with the one-side and the other-side head covers 14, 16 is attached. A bearing cap 18 is attached to the lower portion of the cylinder block 4 of the engine 2, and an oil pan (not shown) is attached. In addition,
Reference numeral 20 is an oil pump.

The engine 2 is provided with a crank sprocket 24 attached to one end in the axial direction of a crank shaft 22 which is rotatably supported by a bearing cap 18 on a cylinder block 4. The one-side cylinder head 10 and the other-side cylinder head 12 respectively include one-side first and second cam shafts 26 and 28 for intake and exhaust and the other-side first and second cams for intake and exhaust. The shafts 30 and 32 are rotatably supported. One side first / second cam shaft 26.2
8, one side first and second cam sprockets 34 and 36 are attached to the other side in the axial direction, respectively. Other side first
The second cam shafts 30 and 32 are provided with the other-side first and second cam sprockets 38 and 40 respectively attached to one end side in the axial direction.

One of the two one-side first and second cam shafts 26, 28 axially supported by the one-side cylinder head 10, and one end of the intake one-side first cam shaft 26 in the axial direction, has one axial end. A side intermediate sprocket 42 having a diameter larger than that of the crank sprocket 24 is attached to the side. The other side cylinder head 12 is positioned between the other side first and second cam shafts 30 and 32 and the crankshaft 22 and has an intermediate shaft 44 at one end in the axial direction, which is an intermediate bolt for mounting an intermediate shaft. 46
It is installed and provided by. On the intermediate shaft 44, the other intermediate sprocket 48 and the other first and second cam sprocket 38.
A sprocket 50 for the other side cam having the same diameter as 0 and a small diameter is rotatably supported. The other side intermediate sprocket 48 and the other side cam sprocket 50 are integrally provided and supported by the intermediate shaft 44.

In the cylinder block 4, the idle shaft 52 is located above the center between the one side and the other side cylinder banks 6 and 8, and the idle shaft 52 is attached to one end in the axial direction of the idle shaft mounting bolt 5.
It is attached and provided by 4. An idle sprocket 56 is rotatably supported on the idle shaft 52.

The crank chain sprocket 24, the intermediate sprocket 42 on one side, the intermediate sprocket 48 on the other side, and the idle sprocket 56 include a timing chain 5
It is provided by winding 8. The one side cam chain 60 is wound around the one side first and second cam sprockets 34, 36. The other side first and second cam sprockets 38
The other side cam chain 62 is wound around the 40 and the other side cam sprocket 50.

The timing chain 58 is provided with a timing tensioner 64 which applies a constant tension.
The one side cam chain tensioner 6 which gives a constant tension to the one side cam chain 60 and the other side cam chain 62.
6 and the other side cam chain tensioner 68 are provided.
Reference numeral 70 is a timing guide for guiding the timing chain 58. Further, reference numeral 72 is a chain cover.

In the tensioner device for the engine 2, the other-side cam chain tensioner 68 is disposed so as to be positioned on the inner back side surrounded by the other-side cam chain 62. As shown in FIGS. 3 to 7, the other side cam chain tensioner 68 is provided with the other side tensioner body 74 having a substantially triangular frame shape.
A mounting hole 76 is provided in the other side tensioner main body 74, and a shaft body 78 that is mounted in the mounting hole 76 so as to be retractable and is pushed forward in the projecting direction by an appropriate pushing force imparting means is provided. Further, there is provided a pushing body 80 that pushes the other side cam chain 62 outward to apply a constant tension.

The other side cam chain tensioner 68 is
The other side tensioner main body 74 having a substantially triangular frame shape is provided with a minimum necessary other side cylinder head attachment boss portion 82 that is attached to the other side cylinder head 12 located on the inner side surrounded by the other side cam chain 62. , Intermediate shaft mounting boss portion 8 mounted on the intermediate shaft mounting bolt 46 of the intermediate shaft 44
4 is provided. In this embodiment, the other side tensioner main body 74 is provided at the two vertices of the other side tensioner main body 74 with the other side cylinder head mounting boss portions 82, 82 respectively, and at the same time one vertice is provided for the intermediate shaft. Mounting boss 8
4 is provided. Mounting boss 82 for other side cylinder head
82 and the intermediate shaft mounting boss portion 84 respectively include the other side cylinder head mounting holes 86, 86 and the intermediate shaft mounting hole 88.
Is provided.

The other side cylinder head 12 is located on the inner side surrounded by the other side cam chain 62, and
The other side cylinder head side mounting boss portions 90, 90 are provided so as to coincide with the other side cylinder head mounting boss portions 82, 82. Other side cylinder head side mounting boss 9
0/90 has other side cylinder head side mounting holes 92/92
Is provided. Other side cylinder head side mounting hole 92 ・
The other side tensioner mounting bolts 94, 94 are screwed to 92. Further, the other side cylinder head 12 is provided with an intermediate shaft mounting bolt boss portion 96 into which the intermediate shaft mounting bolt 46 for mounting the intermediate shaft 44 is inserted, and an intermediate shaft mounting bolt mounting hole 98 is provided. The intermediate shaft mounting bolt 4 is inserted into the mounting hole 98 for the intermediate shaft mounting bolt at one end side.
An intermediate shaft mounting nut 100 is screwed to the other end side of 6.

As described above, the other-side cam chain tensioner 68, which gives a constant tension to the other-side cam chain 62, is disposed on the inner back side surrounded by the other-side cam chain 62, and the other-side cam chain tensioner 68 is provided. Side tensioner body 74
Is attached to the other side cylinder head 12 on the inner side of the other side cam chain 62 by the other side tensioner mounting bolts 94, 94.
And the intermediate shaft mounting bolt 46 of the intermediate shaft 44
An intermediate shaft mounting boss portion 84 that is mounted by the intermediate shaft mounting nut 100 is provided. The reference numeral 101 is a thrust washer.

Next, the operation will be described.

The other side cam chain tensioner 68 is
Other side cylinder head mounting bosses 82, 82 arranged on the inner side of the other side cam chain 62 and located at two vertices of the other side tensioner main body 74 in the shape of a substantially triangular frame. The mounting holes 86, 86 are aligned with the other side cylinder head side mounting bosses 90, 90 of the other side cylinder head 12 and the other side cylinder head side mounting holes 92, 92.
At the same time, the other side cam chain tensioner 68 is provided with an intermediate shaft mounting hole 88 of an intermediate shaft mounting boss portion 84 provided at one apex of the other side tensioner main body 74 having a substantially triangular frame shape.
Are fitted and fitted to the intermediate shaft mounting bolts 46.

The other side tensioner mounting bolt 9 is inserted into the other side cylinder head mounting boss portion 82, 82 other side cylinder head mounting hole 86, 86.
Inserting 4 and 94, the other side cylinder head side mounting boss 9
It is screwed into the other cylinder head side mounting hole 92 of the 0.90. In addition, the intermediate shaft mounting bolt 46 into which the intermediate shaft mounting hole 88 of the intermediate shaft mounting boss portion 84 of the other side tensioner main body 74 is inserted is provided between the central shaft mounting boss portion 84 and the intermediate shaft 44. The intermediate shaft mounting nut 100 is screwed through the thrust washer 101.

As a result, the other-side cam chain tensioner 68, which gives a constant tension to the other-side cam chain 62, is arranged inside the other-side cam chain 62. Also, the other side cam chain tensioner 68 is the other side tensioner main body 7
Other side cylinder head mounting boss portion 82 provided at 4
82 to the other side cylinder head 12 and the other side mounting bolt 94.
The intermediate shaft mounting nut 46 is attached to the intermediate shaft mounting bolt 46 of the intermediate shaft 44 by the intermediate shaft mounting boss portion 84 provided on the other side tensioner body 74.
Mounted by. Therefore, the other side tensioner body 74, the other side intermediate sprocket 48, and the other side cam sprocket 50 are fastened together with the intermediate shaft mounting bolt 46 by the intermediate shaft mounting nut 100.

As described above, in the tensioner device of the engine 2, since the other side cam chain tensioner 68 is arranged on the inner side of the other side cam chain 62, the one side and the other side cylinder heads 10 and 12 are connected. Is not provided so as to project to the space S side. Therefore, the other side cylinder head 1
It is not necessary to project and secure the mounting surface on which the other side cam chain tensioner 68 is mounted on the outer side of 2, and the other side cylinder head 12 can be downsized by the area of this mounting surface, and the intake manifold (not shown). It is possible to enlarge the space S in which parts such as) are arranged, and to effectively use the space S.

The other side tensioner main body 74 of the other side cam chain tensioner 68 has another side mounting bolt 94 attached to the other side cylinder head 12 on the inner side of the other side cam chain 62.
The other side cylinder head mounting boss portions 82, 82 are provided by 94, and the intermediate shaft mounting boss portion 84 that is mounted on the intermediate shaft mounting bolt 46 of the intermediate shaft 44 is provided. As a result, the intermediate shaft 44 has the other side tensioner main body 74 at each end side on the other side cam chain tensioner 68.
It can be supported by the other cylinder head 12. Therefore, it is not necessary to provide components such as the intermediate shaft support bracket, the number of components can be reduced, and the support rigidity of the intermediate shaft 44 can be increased. The surface 44A can be made small, which can contribute to the reduction in diameter of the intermediate shaft 44 and the intermediate shaft mounting bolt 46.

FIG. 8 shows a second embodiment of the present invention.

The feature of this second embodiment is that the thrust support portion 8 is provided on the intermediate shaft mounting boss portion 84 of the other side tensioner body 74 of the other side cam chain tensioner 68.
4A is provided integrally. The thrust support portion 84A supports the thrust force of the other side intermediate sprocket 48 and the other side cam sprocket 50 that are pivotally supported by the intermediate shaft 44. The thrust support portion 84A has a smaller diameter than the intermediate shaft 44, and the other side intermediate sprocket 4
It is formed in such a size that it can be slidably contacted with the side surface of No. 8.

According to the structure of the second embodiment, the other side cam chain tensioner 68 arranged on the inner side of the other side cam chain 62 is for the other side cylinder head provided on the other side tensioner main body 74. Attach the mounting bosses 82, 82 to the other side cylinder head 12 and the other side tensioner mounting bolts 94, 94.
And the tensioner main body 74 on the other side
The intermediate shaft mounting boss portion 84 provided on the
The intermediate shaft mounting bolt 46 is attached by the intermediate shaft mounting nut 100.

At this time, the other side intermediate sprocket 48 and the other side cam sprocket 5 pivotally supported by the intermediate shaft 44 are mounted on the intermediate shaft mounting boss portion 84 of the other side tensioner main body 74.
By integrally providing the thrust support portion 84A that supports the thrust force of 0, the other side intermediate sprocket 48
Also, the thrust force of the sprocket 50 for the other side cam can be supported. As a result, a thrust support member is provided between the intermediate shaft 44 and the intermediate shaft mounting boss portion 84.
-It is not necessary to interpose the thrust washer 101 shown in FIG. Therefore, the thrust washer 101 can be omitted, and the number of parts can be reduced.

[0037]

As described in detail above, according to the present invention, since the cam chain tensioner is disposed on the inner side of the cam chain, it is not provided so as to project outward from the cylinder head. Therefore, the cylinder head can be downsized, the space in which components such as the intake manifold are arranged can be increased, and the space can be effectively used. In addition, the tensioner body of the cam chain tensioner is provided with a cylinder head mounting boss that is mounted on the cylinder head on the inner side of the cam chain with a tensioner mounting bolt, and an intermediate shaft mounting boss that is mounted on the intermediate shaft mounting bolt of the intermediate shaft. By providing the portion, the intermediate shaft can be supported by the tensioner body of the cam chain tensioner and the cylinder head. Therefore, it is not necessary to provide parts such as an intermediate shaft support bracket, the number of parts can be reduced, the support rigidity of the intermediate shaft can be increased, and the contact surface of the intermediate shaft with the cylinder head can be reduced. This can contribute to a reduction in the diameter of the intermediate shaft / intermediate shaft mounting bolt. In addition, if the thrust support part that supports the thrust force of the other side intermediate sprocket and the cam sprocket that are pivotally supported by the intermediate shaft is integrally provided on the intermediate shaft mounting boss of the tensioner body of the cam chain tensioner, It is possible to eliminate the need for a thrust washer which is a thrust supporting member for the sprocket and the sprocket for the cam.
Therefore, the number of parts can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of an engine tensioner device according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a line 〓-〓 of FIG.

FIG. 3 is a plan view of the other side cam chain tensioner.

FIG. 4 is a front view of the other side cam chain tensioner.

5 is a side view of the other side cam chain tensioner taken along the arrow V in FIG. 4. FIG.

FIG. 6 is a side view of the other side cam chain tensioner taken along the arrow 〓 in FIG.

FIG. 7 is a rear view of the other side cam chain tensioner.

FIG. 8 is an enlarged sectional view of an engine tensioner device showing a second embodiment of the present invention.

FIG. 9 is a front view of an engine tensioner device showing a conventional example of the present invention.

10 is an enlarged cross-sectional view of the XX line portion of FIG.

[Explanation of symbols]

 2 engine 4 cylinder block 10 one side cylinder head 12 other side cylinder head 22 crankshaft 24 crank sprocket 26/28 one side first / second camshaft 30/32 other side first / second camshaft 34/36 one side First / second cam sprocket 38/40 Other side first / second cam sprocket 42 One side intermediate sprocket 44 Intermediate shaft 46 Intermediate shaft mounting bolt 48 Other side intermediate sprocket 50 Other side cam sprocket 54 Idle shaft 56 Idle Sprocket 58 Timing chain 60/62 One side / other side cam chain 64 Timing tensioner 66/68 One side / other side cam chain tensioner 74 Other side tensioner main body 76 Mounting hole 78 Shaft body 80 Pusher 82/82 Other side cylinder head Mounting boss 84 for intermediate shaft mounting boss 8 A Thrust support 86/86 Other side cylinder head mounting hole 88 Intermediate shaft mounting hole 90/90 Other side cylinder head side mounting boss 92/92 Other side cylinder head side mounting hole 94/94 Other side tensioner mounting bolt 96 Intermediate shaft mounting bolt boss 98 Mounting hole for intermediate shaft mounting bolt 100 Intermediate shaft mounting nut

Claims (2)

[Claims] 1. A crank sprocket is attached to a crank shaft that is axially supported by a cylinder block of an engine.
First and second shafts supported by the cylinder head of the engine
A first and a second cam sprocket are attached to the cam shaft, and an intermediate sprocket and a cam sprocket are axially supported by an intermediate shaft attached to the cylinder head. The crank sprocket and the intermediate sprocket are provided with a timing chain. Is provided by wrapping around
In a tensioner device for an engine, wherein a cam chain is provided by winding a cam chain around a second cam sprocket and a cam sprocket, and a constant tension is applied to the cam chain, the cam chain tensioner is provided inside the cam chain. The cam chain tensioner body is provided with a cylinder head mounting boss that is mounted on the cylinder head on the inner side of the cam chain with a tensioner mounting bolt, and is mounted on the intermediate shaft mounting bolt of the intermediate shaft. A tensioner device for an engine, characterized in that a mounting boss portion for the intermediate shaft is provided. 2. A thrust support portion for integrally supporting a thrust force of an intermediate sprocket and a sprocket for a cam, which are axially supported by the intermediate shaft, integrally with a mounting boss portion for the intermediate shaft of a tensioner body of the cam chain tensioner. The engine tensioner device according to claim 1, wherein the tensioner device is provided.