JP6047029B2 - Valve control device - Google Patents

Description

  The present invention relates to a valve control device that controls the flow rate of air by opening and closing a valve.

  For example, in an internal combustion engine mounted on a vehicle or the like, intake air is diverted by an intake manifold having a plurality of branch pipes and supplied to each cylinder chamber. In recent years, when supplying air to each cylinder chamber, a valve control device that controls the flow direction of the air so as to form a vortex in the cylinder chamber has been used.

  This valve control device has a plurality of valves respectively disposed in a plurality of branch pipes in an intake manifold, and a fitting portion penetrating in a rectangular cross section is formed at an end portion of the valve, and the fitting portion A rotating shaft having a rectangular cross section is inserted through the shaft. The four inner wall surfaces of the fitting portion are each formed with a flat portion protruding toward the rotating shaft, and the rotating shaft is brought into the fitting portion by bringing the flat portion and the rotating shaft into contact with each other. The sliding area is reduced by reducing the contact area when inserted and assembled. And in the valve control device assembled in this way, the rotation shaft is rotated by energizing the drive unit, and the flow rate and the flow direction of the air flowing through each branch pipe are controlled by rotating the valve. (For example, refer to Patent Document 1).

JP 2006-70720 A

  However, in the above-described valve control device, since it is necessary to form a plurality of flat portions on the inner wall surface of the fitting portion constituting the valve, the structure of the valve becomes complicated, and accordingly, the manufacture is The cost increases, and when the rotary shaft is inserted into the fitting portion and assembled, the plane portion and the rotary shaft are in surface contact with each other simultaneously on four surfaces, so that the sliding resistance is large and the assemblability is lowered. The problem of end up occurs.

  The present invention has been made in consideration of the above-described problems, and an object of the present invention is to provide a valve control device capable of improving the assembling property of the shaft to the valve with a simple configuration.

In order to achieve the above object, the present invention includes a drive unit that is rotationally driven, a shaft that rotates under the drive action of the drive unit, and a valve that rotates while being connected to the shaft. In the valve control device that controls the rotation,
A shaft hole into which the shaft is inserted is formed in the valve, and the shaft hole extends along the axial direction of the shaft and communicates with the outside,
A second slit that is offset in the axial direction with respect to the first slit, and that is formed on the opposite side of the first slit with respect to the shaft hole and communicates with the outside;
Equipped with a,
The shaft hole is formed in a rectangular shape in cross section, the first slit is formed in a first inner wall surface of four surfaces constituting the shaft hole, and the second slit is opposed to the first inner wall surface. An inner wall surface is formed, and the shaft hole communicates with the first slit and is spaced from the side surface of the shaft to the second inner wall surface along the penetrating direction of the first slit. A first gap that extends and a second gap that communicates with the second slit and that is spaced from the side surface of the shaft and extends to the first inner wall surface along the penetration direction of the second slit. And
And said first gap and said second gap, wherein the Rukoto formed so as to be opposite to each other about said shaft.

  According to the present invention, in the valve constituting the valve control device, the first slit having a shaft hole through which the shaft is inserted, extending along the axial direction of the shaft and communicating with the outside, and the first slit A second slit that is offset in the axial direction with respect to the first slit and that is formed on the opposite side of the shaft hole with respect to the shaft hole and communicates with the outside is formed in the shaft hole.

Therefore, when the shaft and the valve are assembled by inserting the shaft into the shaft hole, the sliding resistance generated between the shaft and the shaft hole by the first and second slits can be reduced. As a result, it is possible to easily assemble the shaft to the valve with a simple configuration in which the first and second slits are provided on the valve, and to improve the assemblability. In addition, since the number of corners in the shaft hole can be further reduced, the stress concentration in the shaft hole can be further suppressed, and the shaft can be more smoothly inserted and assembled into the shaft hole. It becomes possible.

In addition, when a driving force from the driving unit is applied to the shaft inserted into the shaft hole, since the shaft is formed in a rectangular cross section, stress concentration occurs in the corner of the shaft hole. By providing the first and second slits, the number of the corners is reduced, so that the stress concentration can be suppressed, and the first slit and the second slit are offset along the axial direction of the shaft. Therefore, the shaft core is prevented from being displaced with respect to the shaft hole.

  The valve control device may be used as a control valve that controls the flow of air supplied to the cylinder chamber of the internal combustion engine and generates a vortex flow in the cylinder chamber.

  According to the present invention, the following effects can be obtained.

  That is, the valve constituting the valve control device has a shaft hole through which a shaft is inserted, the first slit extending along the axial direction of the shaft and communicating with the outside in the shaft hole, and the first By providing a second slit that is offset in the axial direction with respect to the slit and that is formed on the opposite side of the first slit with respect to the shaft hole and communicates with the outside, When the shaft is assembled, the sliding resistance generated between the shaft and the shaft hole can be reduced by the first and second slits. As a result, it is possible to easily assemble the shaft to the valve with a simple configuration in which the first and second slits are provided in the valve, and to improve the assemblability.

1A is an external perspective view showing a state in which a valve control device according to an embodiment of the present invention is provided at an end of an intake manifold, and FIG. 1B is a valve and a shaft constituting the valve control device of FIG. 1A. It is an external appearance perspective view which shows a part of. 2A is a front view of the valve shown in FIG. 1B, FIG. 2B is a rear view of the valve shown in FIG. 2A, and FIG. 2C is a cross-sectional view taken along line IIC-IIC in FIG. 2B. 3A is a cross-sectional view taken along line IIIA-IIIA in FIG. 2A, and FIG. 3B is a cross-sectional view taken along line IIIB-IIIB in FIG. 2A. 4A is an operation cross-sectional view showing a fully opened state of the valve shown in FIG. 1B, and FIG. 4B is an operation cross-sectional view showing a fully closed state of the valve shown in FIG. 4A.

  A preferred embodiment of a valve control device according to the present invention will be described below and described in detail with reference to the accompanying drawings. In FIG. 1A, reference numeral 10 indicates a valve control device according to an embodiment of the present invention. In the following description, for example, in a three-cylinder internal combustion engine 16 having three cylinder chambers mounted on a vehicle or the like, the flow of air supplied to each cylinder chamber of the internal combustion engine 16 by the valve control device 10. The case where it is used as a control valve for controlling the above will be described.

  As shown in FIGS. 1A and 1B, the valve control device 10 includes an internal combustion engine 16 (see FIGS. 4A and 4B) in an intake manifold 14 having a plurality of (for example, three) branch pipes 12a to 12c. Provided at one end connected to the cylinder head 18 (see FIGS. 4A and 4B), and is driven by a control signal from a controller (not shown), and a shaft 22 that rotates under the drive action of the drive unit 20. And a plurality of valves 24 a to 24 c that are provided inside the branch pipes 12 a to 12 c and rotate together with the shaft 22.

  The drive unit 20 includes a rotational drive source such as a motor, for example, is housed inside the housing 26, and is fixed to the end of the intake manifold 14. And the drive shaft of a rotational drive source is connected to the edge part of the shaft 22, and the shaft 22 rotates integrally by rotating a drive shaft under the energization effect | action from a controller.

  As shown in FIGS. 1A to 4B, the shaft 22 has a rectangular cross section and is formed of a shaft body having a predetermined length along the axial direction (the directions of arrows A and B), and the branch pipe 12 a in the intake manifold 14. Are arranged so as to be orthogonal to the extending direction of ˜12c, and are provided so as to be inserted in the vicinity of one end of the intake manifold 14. And the shaft 22 is provided so that it may penetrate from one end part along the width direction (arrow A, B direction) of the intake manifold 14 to the other end part, and is rotatably supported.

  The valves 24 a to 24 c are provided in the vicinity of the opening 28 of each branch pipe 12 a to 12 c, and a main body portion 30 formed in a plate shape with a substantially constant thickness, and an end portion of the main body portion 30 formed on the shaft 22. A plurality of (for example, six) first to third rectifying ribs 34a, 34b, 36a, 36b, 38a, 38b formed on the back surface (other side surface) 30b of the main body 30; Consists of. In addition, the valves 24a to 24c provided in the branch pipes 12a to 12c are formed in the same shape.

  The main body 30 is formed in a substantially rectangular shape, and one end thereof is on the opening 28 side of each branch pipe 12a to 12c, and is substantially parallel to the width direction (arrow A, B direction) of the intake manifold 14. Are provided in the branch pipes 12a to 12c.

  A support section 32 having a circular cross section is formed at the other end of the main body section 30, and the support section 32 is formed such that its center is offset from the main body section 30 by a predetermined distance in the radial direction ( (See FIG. 3A). Further, a shaft hole 40 having a rectangular cross section is formed at the center of the support portion 32, and the shaft hole 40 penetrates along the axial direction of the support portion 32 (the width direction of the main body portion 30). As shown in FIG. 3B, the first and second vertical surfaces 42 and 44 that are the inner wall surfaces are orthogonal to the main body 30, and a pair of horizontal surfaces 46 a and 46 b are formed in parallel with the main body 30. . The first vertical surface (first inner wall surface) 42 is formed on the main body portion 30 side, and the second vertical surface (second inner wall surface) 44 is formed on the opposite side to the main body portion 30.

  As shown in FIG. 2C, the shaft hole 40 has widened portions 48 that are widened at both ends, and the widened portion 48 is formed with a cross-sectional area larger than the cross-sectional area of the shaft 22. The widened portion 48 is not limited to the case of widening to the first vertical surface 42 side. For example, the widened portion widened to the second vertical surface 44 side facing the first vertical surface 42. 48a (a two-dot chain line shape in FIG. 2C) may be used. Thereby, compared with the case where only the wide part 48 is provided with respect to the shaft hole 40, since the cross-sectional area can be further ensured by the wide parts 48 and 48a, the insertability of the shaft 22 can be further enhanced.

  Furthermore, you may make it form a wide part with respect to the horizontal surfaces 46a and 46b. Thereby, since the cross-sectional area of the both ends of the shaft hole 40 can be further increased with respect to the widened portions 48 and 48a described above, the shaft 22 can be further easily inserted.

  Further, as shown in FIGS. 1B to 2C, the support portion 32 has a first slit 50 formed in a central portion along the axial direction (arrows A and B directions), and the first slit 50. On the other hand, a pair of second slits 52a and 52b are formed on both ends of the support portion 32 so as to be spaced apart from each other by a predetermined distance.

  The first and second slits 50, 52 a, 52 b are formed in a rectangular shape with a long cross section along the axial direction (arrow A, B direction) of the shaft hole 40, and the first slit 50 is a main body in the support portion 32. It is formed on one end side of the portion 30 and penetrates to the first vertical surface 42 of the shaft hole 40. The second slits 52a and 52b are formed on the outer peripheral surface of the support portion 32 on the side opposite to the first slit 50, and penetrate to the second vertical surface 44 of the shaft hole 40 (see FIG. 2C).

  That is, the first and second slits 50, 52 a, 52 b are formed on the outer peripheral surface of the support portion 32 so as to be staggered around the shaft hole 40, and along the axial direction (arrow A, B direction). However, they are offset from each other. Note that both end portions of the first slit 50 are formed so as to overlap the end portions of the second slits 52a and 52b by a predetermined length along the axial direction (the directions of arrows A and B).

  Further, as shown in FIGS. 2C and 3A, the shaft hole 40 has a first slit 50 at the center portion along the axial direction (the directions of arrows A and B), and the first vertical surface 42 does not exist. 2 is composed of three surfaces, that is, a vertical surface 44 and horizontal surfaces 46a and 46b. On the other hand, as shown in FIGS. 2C and 3B, in the vicinity of both end portions of the shaft hole 40, a second pair of second slits 52a and 52b Each of the vertical surfaces 44 does not exist, and is constituted by three surfaces of the first vertical surface 42 and the horizontal surfaces 46a and 46b.

  The first to third rectifying ribs 34 a, 34 b, 36 a, 36 b, 38 a, 38 b are formed in pairs, and protrude at a predetermined height so as to be substantially orthogonal to the back surface 30 b of the main body 30. A plurality are formed so as to be spaced apart from each other at equal intervals along 30 width directions (arrows A and B directions).

  The first rectifying ribs 34a and 34b are formed at both ends along the width direction (arrow A and B direction) of the main body 30, respectively, and the second rectifying ribs 36a and 36b are formed on the first rectifying ribs 34a and 34b. The third rectifying ribs 38a and 38b are spaced apart from the second rectifying ribs 36a and 36b and are further separated from the second rectifying ribs 36a and 36b toward the central side in the width direction of the main body 30. Formed.

  The first to third rectifying ribs 34 a, 34 b, 36 a, 36 b, 38 a, 38 b extend from the outer peripheral surface of the support portion 32 on the other end side of the main body 30 to one end of the main body 30. The height is gradually reduced toward the one end (see FIGS. 3A and 3B).

  That is, the first to third rectifying ribs 34 a, 34 b, 36 a, 36 b, 38 a, 38 b are provided substantially parallel to each other so as to extend from one end of the main body 30 toward the other end.

  Moreover, the 1st slit 50 formed in the support part 32 is arrange | positioned so that it may become between a pair of 3rd rectification ribs 38a and 38b, as FIG. 2A and FIG. 2C show.

  The valve control apparatus 10 according to the embodiment of the present invention is basically configured as described above. Next, a case where the shaft 22 is assembled to each of the valves 24a to 24c will be described.

  First, the tip end of the shaft 22 is inserted into the shaft hole 40 from one end side of the support portion 32 in the valve 24a. At this time, since the widened portion 48 opened larger than the cross-sectional area of the shaft 22 is formed at the end of the shaft hole 40, the tip of the shaft 22 can be easily inserted.

  Next, the shaft 22 is guided along the shaft hole 40 by further inserting the tip end of the shaft 22 toward the center of the support portion 32, but at the portion facing the second slit 52 a, the second is provided. Since the inner wall surface (the second vertical surface 44 side) opposite to the first vertical surface 42 is opened by the slit 52a, the sliding resistance generated under the contact action with the second vertical surface 44 is avoided. . Specifically, the shaft 22 is guided along the axial direction with its outer wall surface in contact with the first vertical surface 42 and the three horizontal surfaces 46a and 46b.

  Further, by inserting the shaft 22 along the shaft hole 40, the first vertical surface 42 side is now opened at the position facing the first slit 50, so that the contact action with the first vertical surface 42 is performed. The sliding resistance generated below is avoided and guided along the axial direction while being in contact with and supported by the three surfaces of the second vertical surface 44 and the pair of horizontal surfaces 46a and 46b.

  Further, by inserting the shaft 22 to the position facing the other second slit 52b, the second vertical surface 44 side is opened, so that the sliding resistance generated under the contact action with the second vertical surface 44 is avoided. The first vertical surface 42 and the horizontal surfaces 46a and 46b are guided along the axial direction (the directions of arrows A and B) in contact with the three surfaces.

  Finally, the tip end portion of the shaft 22 reaches the widened portion 48 on the other end side of the shaft hole 40 and protrudes to the outside, whereby the assembly operation of the shaft 22 with respect to the valve 24a is completed. As described above, the shaft 22 is sequentially assembled to the plurality of valves 24a to 24c.

  Thus, the shaft hole 40 having a rectangular cross section formed in the support portion 32 of the valves 24a to 24c has a first and second opening extending in the axial direction (directions of arrows A and B). Since the slits 50, 52a, and 52b are formed, the shaft hole 40 does not include the first and second slits 50, 52a, and 52b, and is in contact with the rotating shaft at four inner wall surfaces. Compared to the valve control device, it is possible to reduce sliding resistance when the shaft 22 having a rectangular cross section is inserted, and the shaft 22 can be easily assembled to the valves 24a to 24c.

  Next, the operation of the valve control device 10 in which the valves 24a to 24c and the shaft 22 are assembled as described above will be briefly described. 4A will be described assuming that the main body portion 30 of the valves 24a to 24c is substantially parallel to the branch pipes 12a to 12c and the port 54 of the cylinder head 18 as an initial state.

  This initial state is applied, for example, when it is desired to supply a large amount of air to the cylinder chamber in a high load state of the internal combustion engine 16 such as when the vehicle is accelerated, and as shown in FIG. 24c communicates the inside of the branch pipes 12a to 12c with the first and second flow paths 56 and 58 formed in the port 54 of the cylinder head 18, and the air supplied from the branch pipes 12a to 12c is the first. And it introduce | transduces into a cylinder chamber through the 2nd flow paths 56 and 58. FIG.

  Next, for example, when it is determined that the load state of the internal combustion engine 16 is low, for example, when the vehicle is traveling at a constant speed, the drive unit 20 is driven based on a control signal from a controller (not shown), as shown in FIG. 4B. Thus, when the shaft 22 rotates by a predetermined angle, the plurality of valves 24a to 24c rotate around the shaft 22 inside the branch pipes 12a to 12c, respectively. Thereby, one end of the main body 30 constituting the valves 24 a to 24 c is rotated to a position facing the end of the separation wall 60 formed in the port 54 of the cylinder head 18, and is separated by the separation wall 60. The second flow path 58 is covered with the valves 24a to 24c.

  As a result, the communication between the branch pipes 12 a to 12 c and the second flow path 58 is blocked, and the air supplied from the branch pipes 12 a to 12 c to the cylinder head 18 side passes only through the first flow path 56 of the port 54. It is introduced into the cylinder chamber. Thereby, in the cylinder chamber, the air supplied only from the first flow path 56 is swirled, and it is possible to efficiently burn with less fuel by injecting fuel into the swirled air and burning it.

  As described above, in the present embodiment, in the valve control device 10 that controls the rotation of the valves 24a to 24c under the drive action of the drive unit 20, the shaft hole formed in the support portion 32 of the valves 24a to 24c. The shaft hole 40 has a simple configuration in which the first and second slits 50, 52a, and 52b extending in the axial direction (directions of arrows A and B) and communicating with the outside of the shaft hole 40 are provided in the shaft 40. The sliding resistance applied to the shaft 22 when the shaft 22 is inserted and assembled to the shaft 22 can be reduced. Therefore, the assembling property of the shaft 22 with respect to the valves 24a to 24c can be improved.

  Further, when the driving force from the driving unit 20 is applied to the shaft 22 inserted into the shaft hole 40, the shaft 22 is formed in a rectangular shape in cross section, so that stress concentration occurs at the corner of the shaft hole 40. However, since the number of corners is reduced by providing the first and second slits 50, 52a, 52b, the stress concentration can be suppressed, and the first slit 50 and the second slit 52a can be suppressed. , 52b are offset along the axial direction of the shaft 22 (arrows A and B directions), thereby preventing the shaft 22 from being misaligned with respect to the shaft hole 40. .

  Furthermore, since the widened portions 48 formed larger than the cross-sectional area of the shaft 22 are formed at both ends along the axial direction (directions of arrows A and B) of the shaft hole 40, the end portions of the shaft hole 40 are formed. Therefore, the shaft 22 can be easily inserted.

  Furthermore, when the valves 24a to 24c are arranged in the branch pipes 12a to 12c of the intake manifold 14, and the valves 24a to 24c are rotated, the flow state of the air flowing through the branch pipes 12a to 12c is controlled. Since the first slit 50 is provided between the third rectifying ribs 38a and 38b, it is possible to avoid obstructing the air flow.

  Further, since the first slit 50 is opened on the back surface 30b side of the main body 30 constituting the valves 24a to 24c, the air in the branch pipes 12a to 12c is allowed to flow under the rotating action of the valves 24a to 24c. Even when circulating along the surface (one side surface) 30a side of the main body 30, pressure loss due to the first slit 50 does not occur and the air can be smoothly circulated.

  Further, by using the valve control device 10 as a control valve, the valve control device 10 having a simple structure and improved assemblability allows the branch pipes 12a to 12a of the intake manifold 14 to be rotated under the rotating action of the valves 24a to 24c. The flow of air supplied to each cylinder chamber of the internal combustion engine 16 through 12c can be a vortex.

  Next, a valve 100 according to a modification is shown in FIGS. 2A, 2B, 3A, and 3B (two-dot chain line shape). In addition, the same referential mark is attached | subjected to the component same as the valves 24a-24c of the valve control apparatus 10 which concerns on this Embodiment mentioned above, and the detailed description is abbreviate | omitted.

  In the shaft hole 40 of the valve 100, the first gap 104 is formed at a portion facing the first slit 102, and the second gap 108 is formed at a portion facing the second slit 106. This is different from the valves 24 a to 24 c of the valve control device 10.

  As shown in FIG. 3A, a horizontal plane 110 facing the first slit 102 is formed in the shaft hole 40 at a predetermined distance from the bottom surface of the shaft 22, and a first gap is formed between the horizontal plane 110 and the shaft 22. 104 is formed. The first gap 104 is formed with a substantially constant width along the axial direction of the shaft 22 and the shaft hole 40, and extends to the second vertical surface 44 along the penetration direction of the first slit 102.

  Further, as shown in FIG. 3B, a horizontal surface 112 facing the pair of second slits 106 is formed in the shaft hole 40 at a predetermined distance from the upper surface of the shaft 22, and between the horizontal surface 112 and the shaft 22. A second gap 108 is formed. The second gap 108 is formed with a substantially constant width along the axial direction of the shaft 22 and the shaft hole 40, and extends to the first vertical surface 42 along the penetration direction of the second slit 106.

  That is, the first gap 104 and the second gap 108 are offset from each other along the axial direction of the shaft 22 and the shaft hole 40 (in the directions of arrows A and B), and are opposite to each other about the shaft 22. The shaft 22 is supported in contact with two surfaces of the second vertical surface 44 and the horizontal surface 46a at portions that are alternately formed and face the first gap 104, and the shaft 22 at the portion that faces the second gap 108. Is in contact with and supported by the two surfaces of the first vertical surface 42 and the horizontal surface 46b.

  As described above, the horizontal hole 110 communicating with the first slit 102 and spaced apart from the bottom surface of the shaft 22 is formed in the shaft hole 40 of the valve 100 according to the modification, and communicated with the second slit 106. In addition, by forming a horizontal surface 112 spaced from the upper surface of the shaft 22 by a predetermined distance, a first gap 104 is provided between the bottom surface of the shaft 22 and a second gap 108 is provided between the upper surface of the shaft 22. Is provided.

  As a result, in the shaft hole 40, the cross-sectional area of the portion facing the first and second slits 102 and 106 is increased by the first and second gaps 104 and 108. Therefore, the shaft 22 is inserted into the shaft hole 40 and assembled. In this case, the sliding resistance applied to the shaft 22 can be further reduced. Therefore, the assembling property of the shaft 22 with respect to the valve 100 can be further improved.

  Further, the driving force from the driving unit 20 is applied to the shaft 22 formed in a rectangular cross section, and stress concentration occurs in the corners of the shaft hole 40, but the first and second gaps 104 and 108 are formed. Since the number of the corner portions can be further reduced by providing the first and second gaps 104 and 108 in addition to the first and second slits 102 and 106, the stress concentration can be more effectively achieved. Can be suppressed.

  The valve control device according to the present invention is not limited to the above-described embodiment, and can of course have various configurations without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Valve control apparatus 12a-12c ... Branch pipe 14 ... Intake manifold 18 ... Cylinder head 20 ... Drive part 22 ... Shaft 24a-24c, 100 ... Valve 30 ... Main-body part 32 ... Support part 34a, 34b ... 1st rectification rib 36a 36b, second straightening ribs 38a, 38b, third straightening rib 40, shaft hole 42, first vertical surface 44, second vertical surface 48, 48a, widened portion 50, 102, first slit 52a, 52b, 106 ... Second slit

Claims (2)

In a valve control device that has a drive unit that rotates, a shaft that rotates under the drive action of the drive unit, and a valve that is connected to the shaft and rotates, and controls the rotation of the valve.
A shaft hole into which the shaft is inserted is formed in the valve, and the shaft hole extends along the axial direction of the shaft and communicates with the outside,
A second slit that is offset in the axial direction with respect to the first slit, and that is formed on the opposite side of the first slit with respect to the shaft hole and communicates with the outside;
Equipped with a,
The shaft hole is formed in a rectangular shape in cross section, the first slit is formed in a first inner wall surface of four surfaces constituting the shaft hole, and the second slit is opposed to the first inner wall surface. An inner wall surface is formed, and the shaft hole communicates with the first slit and is spaced from the side surface of the shaft to the second inner wall surface along the penetrating direction of the first slit. A first gap that extends and a second gap that communicates with the second slit and that is spaced from the side surface of the shaft and extends to the first inner wall surface along the penetration direction of the second slit. And
Wherein the first gap and the second gap, the valve control device according to claim Rukoto formed so as to be opposite to each other about said shaft. In the valve control apparatus according to claim 1 Symbol placement,
The valve control device is used as a control valve for controlling a flow of air supplied to a cylinder chamber of an internal combustion engine and generating a vortex flow in the cylinder chamber.

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