JP6295930B2 - Valve timing adjustment device - Google Patents

Description

  The present invention relates to a valve timing adjusting device.

  The hydraulic valve timing adjusting device can adjust the valve timing of the intake valve or the exhaust valve of the internal combustion engine by supplying hydraulic oil to the hydraulic chamber in the housing and rotating the vane rotor relatively. In the valve timing adjusting device disclosed in Patent Document 1, the hydraulic oil is supplied to the hydraulic chamber by an oil passage switching valve provided at the center of the vane rotor. A cylindrical filter is detachably attached in the middle of the supply oil passage connected to the oil passage switching valve. This filter can capture fine foreign matters that cannot be captured by an oil filter provided in an engine block or the like.

JP-A-9-280019

  By the way, in Patent Document 1, the filter can be easily removed and cleaned or replaced. However, it is assumed that the filter is regularly maintained (cleaned or replaced) in the first place. Further, the oil filter has a structure in which hydraulic oil flows so as to bypass the filtration portion by opening the bypass valve when clogged. Therefore, when maintenance is neglected or when the oil filter is clogged, a large amount of foreign matter may adhere to the filter. As a result, the flow path area of the filter is reduced, the flow rate of the hydraulic oil is limited, and the valve timing adjustment speed is reduced.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a valve timing adjusting device capable of suppressing a decrease in valve timing adjustment speed.

  The valve timing adjusting device according to the present invention includes a housing, a vane rotor, and an oil passage switching valve. When one of the drive shaft and the driven shaft of the internal combustion engine is a first shaft and the other is a second shaft, the housing can rotate integrally with the first shaft, and the vane rotor can rotate integrally with the second shaft. The vane rotor forms a vane portion that partitions the internal space of the housing into an advance chamber and a retard chamber. The vane rotor has a supply oil passage that can communicate with the external oil passage. The oil passage switching valve can switch communication and blocking between the supply oil passage and the advance chamber, and can switch communication and blocking between the supply oil passage and the retard chamber.

  The valve timing adjusting device further includes a filter and a holder. The filter is provided between the vane rotor or a fixing member fixed to the vane rotor and the second shaft, and can filter the working oil flowing from the external oil passage to the supply oil passage. The holder has a connection oil passage that can connect the external oil passage and the supply oil passage, and holds the filter so that the working oil flowing through the connection oil passage can be filtered, in the radial direction of the vane rotor A space forming portion that forms a foreign matter reservoir space on the outside of the connection oil passage, and an inflow oil passage formation portion that forms an inflow oil passage that connects the connection oil passage and the foreign matter reservoir space on the external oil passage side to the filter. And a spilled oil passage forming portion that communicates the foreign substance reservoir space and the connecting oil passage on the supply oil passage side with respect to the filter, and forms a spilled oil passage whose minimum flow passage width is equal to or smaller than the mesh size of the filter. .

  With this configuration, the foreign matter adhering to the filter is blown radially outward by centrifugal force and taken into the foreign matter accumulation space through the inflow oil passage. At this time, the flow of hydraulic oil from the connection oil passage to the connection oil passage through the inflow oil passage, the foreign matter reservoir space, and the outflow oil passage in order assists the foreign matter to be taken into the foreign matter reservoir space. The spilled oil passage prevents passage of foreign matters larger than the size captured by the filter. For this reason, the foreign matter flowing from the external oil passage is stored in the foreign matter accumulation space, so that the filter can be prevented from being clogged. Therefore, it is possible to suppress a decrease in the valve timing adjustment speed due to filter clogging.

It is sectional drawing explaining schematic structure of the valve timing adjustment apparatus by 1st Embodiment of this invention. It is the II-II sectional view taken on the line of FIG. It is sectional drawing which expands and shows the III part of FIG. It is the figure which looked at the bushing of FIG. 3, the filter, and the holder in the arrow IV direction. It is the VV sectional view taken on the line of FIG. It is sectional drawing which shows the principal part of the valve timing adjustment apparatus by 2nd Embodiment of this invention, Comprising: It is a figure corresponding to FIG. 5 of 1st Embodiment. It is a figure which shows the principal part of the valve timing adjustment apparatus by 3rd Embodiment of this invention, Comprising: It is a figure corresponding to FIG. 4 of 1st Embodiment.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In the embodiments, substantially the same components are denoted by the same reference numerals and description thereof is omitted.
[First Embodiment]
A valve timing adjusting device according to a first embodiment of the present invention is shown in FIG. The valve timing adjusting device 10 adjusts the valve timing of an intake valve (not shown) that opens and closes the camshaft 102 by rotating the camshaft 102 relative to the crankshaft 101 of the internal combustion engine 100. Is provided in the driving force transmission path from the camshaft 102 to the camshaft 102. The crankshaft 101 corresponds to a “drive shaft” recited in the claims. The camshaft 102 corresponds to a “driven shaft” described in the claims.

(overall structure)
First, the overall configuration of the valve timing adjusting device 10 will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the valve timing adjusting device 10 includes a housing 20, a vane rotor 30, and an oil passage switching valve 40.

The housing 20 includes a sprocket 21, a front plate 25, and a rear plate 26.
The sprocket 21 is provided coaxially with the camshaft 102 on the axial extension of the camshaft 102. The sprocket 21 has a cylindrical portion 22, an external tooth portion 23, and a plurality of protruding portions 24. The external tooth portion 23 is provided on the outer wall of the cylindrical portion 22, and is connected to the crankshaft 101 via the timing chain 103. The protruding portion 24 protrudes radially inward from the cylindrical portion 22.

  The front plate 25 is provided on one side in the axial direction with respect to the sprocket 21. The rear plate 26 is provided on the other side in the axial direction with respect to the sprocket 21. The camshaft 102 is fitted in the fitting hole 27 of the rear plate 26. The sprocket 21, the front plate 25, and the rear plate 26 are integrally fixed by bolts 28. The housing 20 can rotate integrally with the crankshaft 101.

  The vane rotor 30 is provided in the housing 20 so as to be rotatable relative to the housing 20, and forms a boss portion 31 and a plurality of vane portions 32. The boss portion 31 is fixed to the camshaft 102 by a sleeve bolt 28 described later. The vane portion 32 protrudes radially outward from the boss portion 31, and partitions the internal space of the housing 20, that is, the space between the protruding portions 24, into an advance chamber 33 and a retard chamber 34. The retard chamber 34 is located in the rotational direction with respect to the vane portion 32. The advance chamber 33 is located in the reverse rotation direction with respect to the vane portion 32.

  The vane rotor 30 is opened to an advance oil passage 35 communicating with the advance chamber 33, a retard oil passage 36 communicating with the retard chamber 34, and an end surface of the boss portion 31 on the camshaft 102 side. Supply oil passage 37. The external oil passage 104 of the camshaft 102 communicates with the oil pump 106 via an oil passage 105 such as an engine block, for example, and the supply oil passage 37 can communicate with the external oil passage 104. The vane rotor 30 rotates relative to the housing 20 by receiving the pressure of the hydraulic oil supplied to the advance chamber 33 or the retard chamber 34, and changes the rotation phase relative to the housing 20 to the advance side or the retard side.

The oil passage switching valve 40 includes a sleeve bolt 41 and a spool 48.
The sleeve bolt 41 is inserted into the vane rotor 30 from the side opposite to the camshaft 102 with respect to the vane rotor 30 and screwed into the camshaft 102. Further, the sleeve bolt 41 forms a sleeve portion 44 between the head portion 42 and the screw portion 43. The sleeve portion 44 includes an advance port 45 that communicates with the advance oil passage 35, a retard port 46 that communicates with the retard oil passage 36, and a supply port 47 that communicates with the supply oil passage 37. have.

  The spool 48 can reciprocate in the axial direction inside the sleeve portion 44, and can selectively connect each port of the sleeve portion 44 in accordance with the axial position. Specifically, when the rotation phase of the vane rotor 30 with respect to the housing 20 is changed to the advance side, the spool 48 connects the supply port 47 and the advance port 45 and passes the retard port 46 through the inside of the spool 48. Communicate with the external drain space. Further, when the rotation phase of the vane rotor 30 with respect to the housing 20 is changed to the retarded angle side, the spool 48 connects the supply port 47 and the retarded port 46 and connects the advance port 45 to the external drain through the outside of the spool 48. Communicate with space.

  A stopper plate 49 is fitted inside the head portion 42 of the sleeve bolt 28. The spool 48 is urged toward the stopper plate 49 by a spring 39. The axial position of the spool 48 is determined by the balance between the urging force of the spring 39 and the pressing force of the linear solenoid 107 provided on the opposite side of the spool 48 with respect to the stopper plate 49.

  In the valve timing adjusting device 10 configured as described above, when the rotational phase is on the retard side with respect to the target value, the advance chamber 33 is connected to the supply oil passage 37 by the oil passage switching valve 40, while the retard angle is retarded. The chamber 34 is connected to the external drain space. As a result, the hydraulic oil in the retard chamber 34 is discharged to the outside while the hydraulic oil is supplied to the advance chamber 33, and the vane rotor 30 rotates relative to the housing 20 toward the advance side.

When the rotational phase is on the advance side with respect to the target value, the advance chamber 33 is connected to the external drain space while the retard chamber 34 is connected to the supply oil passage 37 by the oil passage switching valve 40. Accordingly, the hydraulic oil in the advance chamber 33 is discharged to the outside while the hydraulic oil is supplied to the retard chamber 34, and the vane rotor 30 rotates relative to the housing 20 toward the retard side.
When the rotational phase matches the target value, the advance chamber 33 and the retard chamber 34 are closed by the oil passage switching valve 40. As a result, the rotational phase is maintained.

(Feature configuration)
Next, a characteristic configuration of the valve timing adjusting device 10 will be described with reference to FIGS. In the following description, “radial direction” refers to the radial direction of the vane rotor 30, and “axial direction” refers to the axial direction of the vane rotor 30.
As shown in FIGS. 3 and 4, the valve timing adjusting device 10 further includes a check valve 51, a bushing 52, a filter 53, and a holder 54.

  The bushing 52 is provided between the camshaft 102 and the vane rotor 30. In the present embodiment, the bushing 52 is press-fitted into a press-fitting hole 55 provided in the vane rotor 30. The bushing 52 is recessed to the opposite side of the camshaft 102 with respect to the fitting hole 56 into which the end of the camshaft 102 is fitted, and the bottom surface 57 of the fitting hole 56, and the holder 54 is fitted therein. It has a fitting hole 58, an oil passage hole 61 opening in the bottom surface 59 of the fitting hole 58, and a through hole 62 through which the sleeve bolt 28 is inserted. The bottom surface 57 is abutted against the end surface 63 of the camshaft 102 and corresponds to a “butting surface” recited in the claims. The supply oil passage 37 opens at the bottom surface of the press-fitting hole 55, and the oil passage hole 61 can communicate with the supply oil passage 37. The bushing 52 corresponds to a “fixing member” recited in the claims.

The check valve 51 is sandwiched and fixed between the bushing 52 and the vane rotor 30. In the present embodiment, the check valve 51 is a reed valve, allows the hydraulic oil to flow from the external oil passage 104 toward the supply oil passage 37, and distributes the hydraulic oil from the supply oil passage 37 to the external oil passage 104. To prevent. Thereby, the working oil in the supply oil passage 37 is prevented from flowing back to the external oil passage 104 side.
The filter 53 is provided between the camshaft 102 and the check valve 51, and can filter the hydraulic oil flowing from the external oil passage 104 to the supply oil passage 37.

  The holder 54 forms a boss portion 64 and a filter portion 65. The boss portion 64 is annular, and the sleeve bolt 28 is inserted inside. The filter portion 65 is formed so as to protrude radially outward from the boss portion 64, and includes a filter holding portion 66, a space forming portion 67, an inflow oil passage formation portion 68, and an outflow oil passage formation portion 69. In the present embodiment, two filter units 65 are provided. The boss part 64 has a plurality of protrusions 71 protruding radially, and the holder 54 is fixed by press-fitting the protrusions 71 into the through holes 62.

  The filter holding portion 66 has a connection oil passage 72 that can connect the external oil passage 94 and the supply oil passage 37, and holds the filter 53 so that the working oil flowing through the connection oil passage 72 can be filtered. In the present embodiment, the holder 54 is made of resin, and the outer peripheral portion of the filter 53 is molded in the filter holding portion 66. The connecting oil passage 72 constitutes a part of an oil passage for supplying hydraulic oil to the advance chamber 33 or the retard chamber 34, and the total opening area of the filter 53 in the oil passage is increased. In order to reduce the pressure loss in the filter 53, a locally expanded space is formed at a position adjacent to the filter 53.

  The space forming portion 67 forms a foreign substance accumulation space 73 on the radially outer side with respect to the connection oil passage 72. In the present embodiment, the space forming portion 67 is an outer wall surface of the holder 54 that defines a foreign substance accumulation space 73 between the inner wall surface of the fitting hole 58 and the end surface 63 of the camshaft 102.

  The inflow oil passage forming portion 68 forms an inflow oil passage 76 that connects the connection oil passage 72 and the foreign substance reservoir space 73 to the filter 53 on the external oil passage 94 side. In the present embodiment, the inflow oil passage forming portion 68 is a notch formed in the side wall 77 of the holder 54 on the camshaft 102 side.

  As shown in FIG. 5, the spilled oil passage forming portion 69 allows the foreign matter pool space 73 and the connecting oil passage 72 to communicate with the filter 53 on the supply oil passage 37 side, and the minimum flow passage width W is the mesh size of the filter 53. An spilled oil passage 78 which is the following is formed. As shown in FIGS. 4 and 5, in this embodiment, the spilled oil passage forming portion 69 is a step portion formed on the side wall 79 of the holder 54 on the vane rotor 30 side. The spilled oil passage 78 is defined between the stepped portion and the bottom surface 59 of the fitting hole 58. The minimum flow path width W is a value obtained by adding an axial distance S1 that is a step of the stepped portion and an axial distance S2 that is a value obtained by subtracting the thickness of the filter portion 65 from the depth of the fitting hole 58.

  As shown in FIGS. 3 to 5, the foreign substance reservoir space 73 is an arc-shaped space extending in the circumferential direction along the inner wall surface of the fitting hole 58. An end portion in the circumferential direction of the foreign substance reservoir space 73 is formed by a concave portion 81 that is recessed in the circumferential direction at the outer peripheral portion of the fitting hole 58. The circumferential position of the opening 83 on the foreign matter reservoir space 73 side of the outflow oil passage 78 is different from the circumferential position of the opening 82 on the foreign matter reservoir space 73 side of the inflow oil passage 76. Specifically, the opening 82 of the inflow oil passage 76 is located at the center in the circumferential direction of the foreign matter reservoir space 73, and the opening 83 of the outflow oil passage 78 is at both ends in the circumferential direction of the foreign matter reservoir space 73. positioned.

(effect)
As described above, in the first embodiment, the valve timing adjusting device 10 includes the filter 53 and the holder 54. The filter 53 is provided between the bushing 52 and the camshaft 102 and can filter the working oil flowing from the external oil passage 94 to the supply oil passage 37. The holder 54 has a connection oil passage 72 that can connect the external oil passage 94 and the supply oil passage 37, and a filter holding portion that holds the filter 53 so that the working oil flowing through the connection oil passage 72 can be filtered. 66, a space forming portion 67 that forms a foreign matter reservoir space 73 radially outward with respect to the connection oil passage 72, and an inflow that causes the connection oil passage 72 and the foreign matter reservoir space 73 to communicate with each other on the external oil passage 94 side with respect to the filter 53. The inflow oil passage forming portion 68 forming the oil passage 76 and the filter 53 are connected to the foreign substance reservoir space 73 and the connection oil passage 72 on the supply oil passage 37 side, and the minimum passage width W of the filter 53 is There is an spilled oil passage forming portion 69 that forms an spilled oil passage 78 that is smaller than the mesh size.

  With this configuration, the foreign matter adhering to the filter 53 is blown outward in the radial direction by centrifugal force and taken into the foreign matter accumulation space 73 through the inflow oil passage 76. At this time, the flow of hydraulic oil from the connection oil passage 72 to the connection oil passage 72 through the inflow oil passage 76, the foreign matter reservoir space 73, and the outflow oil passage 78 in order causes the foreign matter to be taken into the foreign matter reservoir space 73. Assist. The spilled oil passage 78 prevents foreign substances larger than the size captured by the filter 53 from passing. Therefore, the foreign matter that has flowed from the external oil passage 94 is stored in the foreign matter accumulation space 73, so that the filter 53 can be prevented from being clogged. Therefore, it is possible to suppress a decrease in the valve timing adjustment speed caused by the filter 53 being clogged.

  In the first embodiment, the foreign substance accumulation space 73 is an arc-shaped space extending in the circumferential direction. The circumferential position of the opening 83 on the foreign matter reservoir space 73 side of the outflow oil passage 78 is different from the circumferential position of the opening 82 on the foreign matter reservoir space 73 side of the inflow oil passage 76. Therefore, the foreign matter taken into the foreign matter accumulation space 73 from the inflow oil passage 76 can be moved in the circumferential direction by the flow of the hydraulic oil. As a result, when the rotation of the valve timing adjusting device 10 stops due to the engine stop, it is possible to suppress the foreign matter in the foreign matter accumulation space 73 from returning to the connection oil passage 72 through the inflow oil passage 76 due to gravity.

  In the first embodiment, the opening 82 of the inflow oil passage 76 is located at the center in the circumferential direction of the foreign matter reservoir space 73, and the opening 83 of the outflow oil passage 78 is the end in the circumferential direction of the foreign matter reservoir space 73. Is located. Thereby, the circumferential position of the opening 83 can be arranged at a position different from the circumferential position of the opening 82.

  In the first embodiment, the bushing 52 has a bottom surface 57 as an abutting surface to be abutted against the end surface 63 of the camshaft 102, and is recessed to the opposite side of the camshaft 102 with respect to the bottom surface 57 and a holder 54 is fitted therein. Fitting hole 58. Accordingly, the axial force of the sleeve bolt 41 can be received by the bottom surface 57 without acting on the holder 54 while holding the holder 54 between the bushing 52 and the camshaft 102.

  In the first embodiment, the space forming portion 67 is an outer wall surface of the holder 54 that defines a foreign substance accumulation space 73 between the inner wall surface of the fitting hole 58 and the end surface 63 of the camshaft 102. Therefore, the diameter dimension of the holder 54 can be made smaller than when the foreign substance reservoir space 73 is partitioned by the holder alone.

  In the first embodiment, the inflow oil passage forming portion 68 is a notch formed in the side wall 77 of the holder 54 on the camshaft 102 side. Therefore, the holder 54 can be formed more easily than when the inflow oil passage forming portion is a hole.

  In the first embodiment, the spilled oil passage forming portion 69 is a step portion formed on the side wall 79 of the holder 54 on the vane rotor 30 side. Therefore, it becomes easier to form the holder 54 than when the spilled oil passage forming portion is a hole.

[Second Embodiment]
In the second embodiment of the present invention, as shown in FIG. 6, the spilled oil passage forming portion 91 is a side wall surface of the holder 54 on the vane rotor 30 side. The spilled oil passage 92 is defined between the side wall surface (spilled oil passage forming portion 91) and the bottom surface 59 of the fitting hole 58. The minimum flow path width W coincides with the axial distance S2.
Thus, even if the stepped portion is not formed on the side wall 79 of the holder 54, the outflow oil passage 92 can be defined between the side wall surface 92 and the bottom surface 59 of the fitting hole 58. According to the second embodiment, the same effect as that of the first embodiment can be obtained.

[Third Embodiment]
In 3rd Embodiment of this invention, as shown in FIG. 7, the recessed part 96 of the outer peripheral part of the fitting hole 95 is long in the circumferential direction compared with the recessed part 81 of 1st Embodiment.
According to the third embodiment, the same effect as that of the first embodiment can be obtained, and more foreign substances can be accumulated in the recess 96.

[Other Embodiments]
In other embodiments of the present invention, one or more filter units 65 may be provided.
In another embodiment of the present invention, the inflow oil passage forming portion may be a hole.
In another embodiment of the present invention, the spilled oil passage forming portion may be a hole.
In another embodiment of the present invention, the opening of the inflow oil passage and the opening of the outflow oil passage may be provided anywhere in the circumferential direction. Further, the opening in the inflow oil passage and the opening in the outflow oil passage may coincide with each other in the circumferential direction.

In another embodiment of the present invention, the holder is not limited to press fitting, and may be fixed by, for example, snap fitting or caulking.
In another embodiment of the present invention, the holder is not limited to the bushing but may be fixed to the camshaft or the vane rotor.
In another embodiment of the present invention, the holder is not limited to resin, but may be made of metal, for example.

In other embodiments of the present invention, the sprocket may be provided anywhere on the housing.
In another embodiment of the present invention, the valve timing adjusting device may adjust the valve timing of the exhaust valve of the internal combustion engine.
The present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 10 ... Valve timing adjustment apparatus 20 ... Housing 30 ... Vane rotor 32 ... Vane part 33 ... Advance angle chamber 34 ... Delay angle chamber 37 ... Supply oil path 40 ... Oil Path switching valve 52 ... Bushing (fixing member) 53 ... Filter 54 ... Holder 66 ... Filter holding part 67 ... Space forming part 68 ... Inflow oil path forming part 69, 91 ...・ Outflow oil passage formation part 72... Connection oil passage 73 .. foreign matter accumulation space 76... Inflow oil passage 78 and 93 .. outflow oil passage 104 ..external oil passage W. width

Claims (7)

A valve timing adjusting device that is provided in a driving force transmission path for transmitting a driving force from a driving shaft (101) to a driven shaft (102) of the internal combustion engine (100) and adjusts a valve timing of a valve that is driven to open and close by the driven shaft. (10)
When one of the drive shaft and the driven shaft is a first axis and the other of the drive shaft and the driven shaft is a second axis,
A housing (20) rotatable integrally with the first shaft;
A vane portion (32) that can rotate integrally with the second shaft and partitions the internal space of the housing into an advance chamber (33) and a retard chamber (34) is formed, and an external oil passage (104 A vane rotor (30) having a supply oil passage (37) capable of communicating with
An oil path switching valve (40) capable of switching communication and blocking between the supply oil path and the advance chamber, and switching communication and blocking between the supply oil path and the retard chamber;
A filter (53) provided between the vane rotor or a fixing member (52) fixed to the vane rotor and the second shaft, and capable of filtering hydraulic oil flowing from the external oil passage to the supply oil passage. When,
A filter holding part (66) having a connection oil path (72) capable of connecting the external oil path and the supply oil path and holding the filter so as to be able to filter the working oil flowing through the connection oil path A space forming portion (67) that forms a foreign matter reservoir space (73) outside the connection oil passage in the radial direction of the vane rotor, and the connection oil passage and the foreign matter reservoir on the external oil passage side with respect to the filter. An inflow oil passage forming portion (68) that forms an inflow oil passage (76) that communicates with the space; and the foreign substance reservoir space and the connection oil passage are communicated with each other on the supply oil passage side with respect to the filter; A holder (54) having an spilled oil passage forming portion (69, 91) forming an spilled oil passage (78, 93) having a minimum flow path width (W) equal to or smaller than the mesh size of the filter;
A valve timing adjusting device comprising: The foreign material reservoir space is an arc-shaped space extending in the circumferential direction,
The circumferential position of the opening (83) on the foreign matter reservoir space side of the spilled oil passage is different from the circumferential position of the opening (82) on the foreign matter reservoir space side of the inflow oil passage. 2. The valve timing adjusting device according to 1. The opening on the foreign matter reservoir space side of the inflow oil passage is located at a circumferential central portion of the foreign matter reservoir space,
The valve timing adjusting device according to claim 2, wherein an opening of the spilled oil passage on the foreign matter reservoir space side is positioned at a circumferential end of the foreign matter reservoir space.   The vane rotor or the fixing member includes an abutting surface (57) that abuts against an end surface of the second shaft, and a fitting hole that is recessed to the opposite side of the abutting surface to the second shaft and into which the holder is fitted ( 58, 95), and the valve timing adjusting device according to any one of claims 1 to 3.   The said space formation part is an outer wall surface of the said holder which divides and forms the said foreign material accumulation space between the inner wall surface of the said fitting hole, and the end surface (63) of the said 2nd axis | shaft. The valve timing adjusting device described.   6. The valve timing according to claim 1, wherein the inflow oil passage forming portion is a notch formed in a side wall (77) on the second shaft side of the holder. Adjustment device.   The valve timing adjusting device according to any one of claims 1 to 6, wherein the spilled oil passage forming portion is a step portion formed on a side wall (79) of the holder on the vane rotor side. .

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