JP2013160131A - Valve gear for intake manifold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely turn a valve element and to prevent a valve device from being damaged.SOLUTION: A valve element 23 includes a plate-like valve body 34 and a pair of shaft parts 53 protruding to both outer sides in a turning axial center direction of the valve body 34. A support 25 supporting the valve element 23 includes a frame part 35 mounted to an inner wall of an intake passage R, and a pair of arm parts 37 which are erected in the frame part 35 so as to face each other and have bearing holes 39 into which the shaft parts 53 are inserted in a turnable manner. Both the arm parts 37 are bridged by a plate member 29 supporting both the arm parts 37 from the inside.

Description

  The present invention relates to a structure of a valve device provided in an intake manifold.

  Patent Document 1 discloses a valve of an intake manifold that is arranged on the downstream side of an intake passage of an intake manifold and is configured to change the cross-sectional area of the intake passage by rotating a valve body supported by a support. An apparatus is disclosed. In this valve device, the valve body includes a plate-like valve main body and a pair of shaft portions protruding outward in the rotational axis direction of the valve main body, and the support is attached to the inner wall of the intake passage. And a pair of arms having a bearing hole that is erected so as to face the frame and into which the shafts are rotatably inserted.

JP 2010-84557 A

  However, in the above-mentioned Patent Document 1, there is nothing that supports the tips of both arms, and the inward tilting is not prevented, so that the rotation of the valve body is prevented by the inward tilting of both arms and the intake air amount is adjusted. There is a risk that the valve body and both arm portions may be damaged by mutual friction by rotating while the valve body is in contact with the outer peripheral edges of the bearing holes of both arm portions.

  The present invention has been made in view of the above points, and an object of the present invention is to make it possible to reliably adjust the intake air amount and to prevent damage to the valve device.

  In order to achieve the above object, the present invention is characterized in that a plate member that supports both leg portions from the inside is provided.

  Specifically, the present invention is an intake that is arranged on the downstream side of the intake passage of the intake manifold and is configured to change the cross-sectional area of the intake passage when a valve body supported by the support rotates. The following solutions were taken for the valve device of the manifold.

  That is, in the first aspect of the present invention, the valve body includes a plate-shaped valve main body and a pair of shaft portions protruding outward in the rotational axis direction of the valve main body. A frame portion attached to the inner wall of the intake passage, and a pair of arm portions that are erected so as to face the frame portion and have bearing holes into which the shaft portions are rotatably inserted. A plate member that supports the arms from the inside is bridged between the arms.

  According to a second aspect of the present invention, in the valve device for an intake manifold according to the first aspect, the one end edge of the plate member is stepped so that the front and back surfaces constitute an intake guide surface at the rotating base of the valve body. It is characterized by closeness.

  According to the first aspect of the present invention, since both the arm portions are supported from the inside by the plate member, the inclining of both the arm portions is prevented, and as a result, the valve body is reliably rotated and the intake amount is increased. Is properly adjusted, and damage caused by friction between the valve body and both arms is also prevented.

  According to the second aspect of the present invention, since the one end edge of the plate member and the rotation base portion of the valve body are close to each other, it is difficult for the intake air to flow in between them as compared with the case where the both are largely separated. In addition, since no step is formed between the two, the flow of intake air becomes smooth.

It is the schematic perspective view which looked at the intake manifold which concerns on Embodiment 1 of this invention from upper direction. It is the schematic perspective view which looked at the intake manifold which concerns on Embodiment 1 of this invention from the downward direction. It is the perspective view which looked at the valve apparatus arrange | positioned in the 1st branch pipe in the state which inserted the drive shaft in the insertion hole from the upper direction. It is the perspective view which looked at the valve apparatus arrange | positioned in the 1st branch pipe in the state which inserted the drive shaft in the insertion hole from the downward direction. It is a disassembled perspective view of a valve apparatus and a drive shaft. FIG. 4 is a cross-sectional view corresponding to the line AA in FIG. 3 when the valve body is in a position to throttle the intake passage. FIG. 7 is a view corresponding to FIG. 6 when the valve body is in a position to open the intake passage. FIG. 7 is a diagram corresponding to FIG. 6 of the second embodiment. FIG. 8 is a diagram corresponding to FIG. 7 of the second embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.

Embodiment 1
1 and 2 show the intake manifold 1. The intake manifold 1 is attached to an engine (not shown), and includes three manifold devices 3 according to Embodiment 1 of the present invention for generating a tumble flow and a swirl flow in a combustion chamber of the engine. 19.

  The manifold body 3 includes a throttle body connection pipe 7, a surge tank 9 connected to the throttle body connection pipe 7, and first to third branch pipes 11 a to 11 c extending from the surge tank 9. The first to third branch pipes 11a to 11c are arranged in order from the right side in FIG. An intake passage R is formed in each of the first to third branch pipes 11a to 11c (see FIG. 6). Further, an upstream flange portion 13 is formed at the upstream end of the throttle body connection pipe 7 so as to be fastened to a throttle body (not shown) having a built-in throttle valve. On the other hand, at the downstream end of the first to third branch pipes 11a to 11c, a downstream flange portion 15 is formed so as to extend so as to connect the first to third branch pipes 11a to 11c. In addition, a pair of drive shaft insertion holes 12 (first shafts) facing the juxtaposed direction of the first to third branch pipes 11a to 11c are formed in the peripheral walls at the downstream ends of the first to third branch pipes 11a to 11c. Only the drive shaft insertion hole 12 outside the branch pipe 11a is shown in FIG. The drive shaft insertion hole 12 outside the third branch pipe 11c forms a bottomed hole, while the other drive shaft insertion holes 12 penetrate the peripheral walls of the corresponding branch pipes 11a to 11c in the parallel arrangement direction. .

  The valve device 19 is disposed on the downstream side of the intake passage R of each of the first to third branch pipes 11a to 11c, and supports the valve body 23 and the valve body 23, as shown in FIGS. The support body 25 and the plate member 29 are provided.

  The valve body 23 is made of resin and extends in one direction from a portion other than the cylindrical rotation base 33 having a fitting hole 31 having a substantially rectangular cross section and both axial ends of the rotation base 33. And a plate-shaped valve body 34. The valve body 34 is gradually thinner in the extending direction.

  The support body 25 is made of resin and includes a substantially rectangular annular frame portion 35 attached to the inner wall of the intake passage R. The portions corresponding to both short sides of the frame portion 35 are narrowed toward the tip. A pair of triangular plate-like arm portions 37 are erected so as to face each other. A circular bearing hole 39 is formed through the tip of each arm portion 37. In the two valve devices 19 disposed on both outer sides of the three valve devices 19, one of the bearing holes 39 disposed on the outer side is a bearing hole 39 (the bearing hole 39 on the front side in FIGS. 3 and 5). ) Is formed wider than the other bearing hole 39 disposed on the inner side, and four concave grooves 41 extending in the penetrating direction are equally spaced in the circumferential direction on the inner peripheral surface of the one bearing hole 39. Open and formed. In the valve device 19 disposed at the center of the three valve devices 19, both bearing holes 39 have the same shape as the other bearing holes 39 (smaller bearing holes 39) of the valve devices 19 on both sides. Further, in the three valve devices 19, the groove portion 42 extending in the standing direction of the arm portion 37 is formed on the inner surface of the both arm portions 37 near one end in the short side direction of the frame portion 35 from the base end of the arm portion 37. 39 is formed in the vicinity. The groove portion 42 is slightly inclined toward the other end in the short side direction of the frame portion 35 toward the distal end side of the arm portion 37. Further, a rectangular positioning hole 43 is formed in the vicinity of the base end of the arm portion 37 so as to intersect with the groove portion 42. Note that the width of the positioning hole 43 in the direction intersecting the groove 42 is set to be longer than the width of the groove 42. Thereby, the intensity | strength of the location corresponding to the positioning hole 43 of a shaping | molding die can be raised.

  The plate member 29 includes a flat plate main body 29a having a rectangular shape in plan view, and a triangular projecting piece portion 29b formed near one end in the longitudinal direction of the end surfaces on both short sides of the plate main body 29a.

  Of the three valve devices 19, the two valve devices 19 disposed on both outer sides are further provided with bearing members 27 that fit into the one bearing hole 39 (the bearing hole 39 disposed on the outer side). The bearing member 27 has a cylindrical portion 47 having a through-hole 45 on the inner side, and an annular protruding portion 49 is formed on one end of the cylindrical portion 47 and is formed on the outer peripheral surface of the cylindrical portion 47. The four protrusions 51 are formed in parallel to each other at equal intervals in the circumferential direction. The bearing member 27 is fitted in the one bearing hole 39 in a state where the protrusion 51 is made to correspond to the concave groove 41 of the one bearing hole 39.

  In the valve device 19 incorporated in the first branch pipe 11 a (actuator side) of the three valve devices 19, one end on the outer side in the longitudinal direction (actuator side) of the rotation base 33 of the valve body 23 penetrates the bearing member 27. The hole 45 is rotatably inserted. Further, in the valve device 19 incorporated in the third branch pipe 11 c (on the anti-actuator side), one end on the outer side in the longitudinal direction (on the anti-actuator side) of the rotation base 33 of the valve body 23 rotates into the through hole 45 of the bearing member 27. Inserted as possible. In other words, one end in the longitudinal direction of the rotation base 33 of each valve body 23 is rotatably inserted into one bearing hole 39 of the support body 25 with the bearing member 27 interposed therebetween. On the other hand, the other end in the longitudinal direction of the rotation base 33 in which one end in the longitudinal direction is inserted into the through hole 45 is directly inserted into the other bearing hole 39 of the support 25 so as to be rotatable. Further, in the valve device 19 disposed in the center among the three valve devices 19, that is, the valve device 19 incorporated in the second branch pipe 11 b, both ends in the longitudinal direction of the rotation base 33 are formed in the both bearing holes 39 of the support body 25. It is directly inserted in the pivotable manner. Thus, both longitudinal ends of the rotation base portion 33 of the valve body 23 of each valve device 19 constitute a pair of shaft portions 53 that protrude outward in the rotation axis direction of the valve body 34. Further, the plate member 29 is bridged between the arm portions 37 in a state where both ends in the long side direction are inserted into the groove portions 42 of the both arm portions 37. In this state, the plate member 29 supports both the arm portions 37 from the inside, and as shown in FIGS. 6 and 7, the intake passage R is divided into the first passage R1 and the second passage narrower than the first passage R1. Partitioned with R2. The reason why the widths of the first passage R1 and the second passage R2 are different is that the groove portion 42 is formed near one end in the short side direction of the frame portion 35. Further, the plate member 29 is inclined toward the first passage R1 toward the distal end side of the arm portion 37 due to the inclination of the groove portion 42 described above. Further, the protruding pieces 29b of the plate member 29 are engaged with the positioning holes 43 of both the arm portions 37, and the movement of the plate member 29 in the longitudinal direction of the groove 42 is prevented.

  A common drive shaft 21 is inserted into the insertion holes 31 of the valve bodies 23 of the three valve devices 19 via the drive shaft insertion holes 12 of the branch pipes 11a to 11c in a skewered manner. The drive shaft 21 is made of, for example, a metal material, and the cross section thereof has the same rectangular shape as the insertion hole 31 of the rotation base 33 of the valve body 23. Therefore, the drive shaft 21 does not rotate with respect to the valve body 23 in a state where the drive shaft 21 is fitted in the fitting hole 31. The end of the drive shaft 21 on the first branch pipe 11a side is connected to an output shaft of an actuator (not shown).

  The actuator is controlled by an engine control device (not shown). For example, when the engine rotational speed is lower than a predetermined rotational speed, the valve body 23 is rotated by rotating the drive shaft 21. Is a state in which the intake passage R is throttled, specifically, a state in which the first passage R1 is closed and only the second passage R2 is opened (shown in FIG. 6). In other words, the first passage R1 and the second passage R2 are opened (shown in FIG. 7).

  Next, a procedure for assembling the valve device 19 configured as described above to the manifold body 3 will be described.

  First, the three valve devices 19 are assembled. In order to assemble these valve devices 19, first, a support body 25 to be incorporated into the first branch pipe 11a and a support body 25 to be incorporated into the third branch pipe 11c are prepared, and an actuator for the support body 25 incorporated into the first branch pipe 11a. The bearing member 27 is fitted into the side (outside) bearing hole 39. Further, the bearing member 27 is fitted into the bearing hole 39 on the non-actuator side (outside) of the support body 25 incorporated in the third branch pipe 11c. Then, one end in the longitudinal direction of the rotation base portion 33 of the valve body 23 is inserted into the through-hole 45 of the fitted bearing member 27, and both the arm portions 37 are bent away from each other to rotate the other bearing hole 39 into the above-described rotation. The other longitudinal end of the base 33 is inserted. Thereby, the shape of both the arm parts 37 is restored. Alternatively, the other end in the longitudinal direction of the rotation base 33 may be inserted into the through hole 45 of the bearing member 27 after one end in the longitudinal direction of the rotation base 33 is inserted into the other bearing hole 39. Also, a support body 25 to be incorporated into the second branch pipe 11b is prepared, and one end in the longitudinal direction of the rotation base 33 of the valve body 23 is inserted into one of both bearing holes 39 of the support body 25, and both arm sections 37 are connected to each other. The other end in the longitudinal direction of the rotation base 33 is inserted into the other of the both bearing holes 39 by bending in the direction of separation. Thereby, the shape of both the arm parts 37 is restored. Thereafter, both ends in the long side direction of the plate member 29 are inserted into the both groove portions 42 from the base end sides of the both arm portions 37 of the three support bodies 25.

  Next, the valve device 19 for the first branch pipe 11a and the valve device 19 for the third branch pipe 11c are respectively connected to the first branch pipe 11a and the arm part 37 on the bearing member 27 side. While inserting into the 3rd branch pipe 11c from a downstream end opening, the valve apparatus 19 for 2nd branch pipes 11b is inserted into the 2nd branch pipe 11b from a downstream end opening. The drive shaft 21 is fitted from the first branch pipe 11a side into the drive shaft insertion holes 12 of the first to third branch pipes 11a to 11c and the fitting holes 31 of the valve bodies 23 of the three valve devices 19 from the first branch pipe 11a side. An actuator is assembled to one end of the first branch pipe 11a on the 21 side.

  Next, the case where the intake manifold 1 is used will be described. When the rotational speed of the engine is lower than the predetermined rotational speed, as shown in FIG. 6, the valve bodies 23 of the three valve devices 19 are rotated by the actuator to a position where the first passage R1 is closed. Thereby, the intake passage R in the first to third branch pipes 11a to 11c is narrowed, and a tumble flow or a swirl flow can be generated in the combustion chamber of the engine. 6 and 7, the flow of the intake air is indicated by a dashed line arrow.

  On the other hand, when the rotational speed of the engine becomes equal to or higher than the predetermined rotational speed, as shown in FIG. 7, the valve bodies 23 of the three valve devices 19 are rotated to the position where the first passage R1 is opened by the actuator.

  According to the first embodiment, since both the arm portions 37 are supported from the inside by the plate member 29, the inner arms 37 are prevented from falling down, and as a result, the valve body 23 is reliably rotated and sucked. While adjusting the amount appropriately, damage due to friction between the valve body 23 and both arm portions 37 is also prevented.

  Further, since the first passage R1 wider than the second passage R2 is opened and closed, the intake air amount can be adjusted largely according to the engine speed, and as a result, the mixing of fuel and air is promoted to improve the combustion efficiency. it can.

<< Embodiment 2 >>
8 and 9 show an intake manifold 1 provided with a valve device 19 according to Embodiment 2 of the present invention. In the second embodiment, the inner portion 29c of the groove portion 42 insertion portion (both ends in the long side direction) of the plate member 29 is inclined so that the inner portion 29c gradually increases from one end side to the other end side in the short side direction. An inclined surface 29d is formed. Further, the end surface on the thick side of the inner portion 29c forms a curved surface 29e that curves in a concave shape in the plate thickness direction.

  The plate member 29 is bridged between the arm portions 37 with the thick-walled side facing the distal end side of the both arm portions 37 and the inclined surface 29d facing the first passage R1 side. The thick-side edge of the inner portion 29c, that is, the edge on the curved surface 29e side, approaches the rotation base 33 of the valve body 23 without a step, and the front and back surfaces constitute the intake guide surface 29f. .

  Since the other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals and description thereof is omitted.

  According to the second embodiment, since the one end edge of the plate member 29 (inner portion 29c) and the rotation base 33 of the valve body 23 are close to each other, the intake air is between them as compared with the case where they are largely separated from each other. Is difficult to flow in. Further, since no step is formed between the two, intake air turbulence does not occur as in the portion surrounded by the alternate long and short dash line in FIGS. 6 and 7, and the flow of intake air is smooth.

  In the first and second embodiments, the case where the present invention is applied to the intake manifold 1 for an in-line three-cylinder engine has been described. However, the present invention is not limited to this, and the intake manifold for a V-type engine or the intake for a horizontally opposed engine is used. Applicable to manifolds.

  In the first and second embodiments, the valve body 23 can be switched between the two states of closing the first passage R1 and opening the first passage R1. The valve body 23 may be switched to three or more states according to the engine speed.

  In the first and second embodiments, the bearing member 27 is fitted into the outer bearing holes 39 of the outer valve devices 19 of the three valve devices 19, that is, a total of two bearing holes 39. The bearing member 27 may be fitted only in the bearing hole 39 on the non-actuator side of the support body 25 for 11c. Further, the bearing member 27 is fitted into the bearing hole 39 on the anti-actuator side of each valve device 19 and the bearing member 27 is not fitted into the bearing hole 39 on the actuator side of each valve device 19. The fitted bearing holes 39 and the bearing holes 39 into which the bearing member 27 is not fitted may be alternately positioned. Further, the bearing members 27 may be fitted into all the bearing holes 39.

  In the first embodiment, the plate member 29 is inclined toward the first passage R1 toward the distal end side of the arm portion 37, but the direction perpendicular to the frame portion 35, that is, the branch pipes 11a to 11c. It may extend in the direction along the axis of. Further, the plate member 29 may partition the intake passage R at the center in the short side direction of the frame portion 35 (the center of each branch pipe 11a to 11c).

  In the second embodiment, a curved surface 29d ′ may be provided on the surface of the inner portion 29c on the first passage R1 side, as shown by a two-dot chain line in FIGS. 8 and 9, instead of the inclined surface 29d. Good.

  The present invention is useful as a structure of a valve device provided in an intake manifold.

DESCRIPTION OF SYMBOLS 1 Intake manifold 19 Valve apparatus 23 Valve body 25 Support body 29 Plate member 29f Intake guide surface 33 Rotation base 34 Valve main body 35 Frame part 37 Arm part 39 Bearing hole 53 Shaft part R Intake passage

Claims (2)

A valve body (23) disposed downstream of the intake passage (R) of the intake manifold (1) and supported by the support (25) rotates to change the cross-sectional area of the intake passage (R). An intake manifold valve device configured as follows:
The valve body (23) includes a plate-shaped valve main body (34) and a pair of shaft portions (53) protruding outward in the rotational axis direction of the valve main body (34),
The support (25) is erected so as to face the frame portion (35) attached to the inner wall of the intake passage (R) and the frame portion (35), and the shaft portions (53) are A pair of arms (37) having a bearing hole (39) inserted rotatably,
A plate member (29) for supporting both arms (37) from the inside is bridged between the arms (37). The intake manifold valve device according to claim 1,
One end edge of the plate member (29) is characterized in that the front and back surfaces approach the rotation base (33) of the valve body (23) without a step so that the intake guide surface (29f) is formed. Intake manifold valve device.

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