JP5729968B2 - Intake control device - Google Patents

Description

  In the present invention, a throttle valve for controlling the opening of an intake passage provided in a throttle body is fixed to a throttle valve shaft that is rotatably supported by the throttle body, and a drive device including an electric motor includes the throttle valve shaft. It is related with the intake control device which is interlocked and connected to the throttle valve shaft so as to rotate and is provided with a ventilation hole for ventilation in the housing case on the side wall of the housing case housing the drive device.

  A drive device including an electric motor is housed in a housing case so as to rotationally drive a throttle valve shaft, and a ventilation hole is provided in a side wall of the housing case, which is known from Patent Document 1. .

JP 2008-144696 A

  In the case disclosed in Patent Document 1, a housing case that houses a drive device includes a case portion that is formed integrally with a throttle body, and a lid that is fastened to the case portion so as to close an open end of the case portion. The ventilation hole is provided in the lid member.

  However, in such a configuration, the space where the ventilation holes can be arranged is limited. In addition, when the ventilation hole is provided in the case part integrated with the throttle body, in order to change the arrangement position of the ventilation hole, the throttle body itself needs to be newly molded with a new mold.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide an intake control device that increases the degree of freedom of layout of ventilation holes and facilitates the formation of ventilation holes.

To achieve the above object, the present invention provides a throttle valve for controlling the opening of the intake passage provided in the throttle body is fixed to a throttle valve shaft which is rotatably supported in the throttle body, an electric motor A drive device including the entire reduction gear mechanism is linked to and coupled to the throttle valve shaft so as to rotationally drive the throttle valve shaft, and the side wall of the storage case that stores the drive device is provided with ventilation in the storage case. the ventilated holes intake control device provided for, the said housing case the throttle body formed separately is the throttle body, attached taken on the outer periphery of the bearing boss for holding the throttle valve shaft, of the side wall of the housing case, the portion facing spaced the throttle body, the conversion that opens to the outside of the throttle body Hole is provided so as to be covered from the outside by the throttle body spaced between該換pores, the side wall, a bottom tubular portion projecting into the throttle body side is continuously provided, this The first feature is that the electric motor is accommodated in the bottomed cylindrical portion.

  In addition to the configuration of the first feature, the present invention has a second feature that a ventilation member having waterproof breathability is attached to the housing case so as to close the ventilation hole from the throttle body side. To do.

  In addition, the 1st ventilation hole 31 of embodiment corresponds to the ventilation hole of Claim 1, 2 of this invention, and the 1st ventilation member 33 of embodiment corresponds to the ventilation member of Claim 2 of this invention. .

According to the first aspect of the present invention, the housing case that houses the drive device including the electric motor and the entire reduction gear mechanism is formed separately from the throttle body , and holds the throttle valve shaft of the throttle body. It is attached to the outer periphery of the bearing boss, and it is easy to provide a ventilation hole for ventilation in the housing case on the side wall of the housing case by molding or processing. Further, in order to change the arrangement location of the ventilation holes, it is only necessary to newly form a storage case irrespective of the throttle body, and an increase in cost can be suppressed. Of the side walls of the housing case, the portion facing spaced throttle body, conversion pores you opened to the outer side of the throttle body, from the outside in the throttle body spaced between該換pores A bottomed cylinder part that protrudes toward the throttle body is connected to the side wall, and an electric motor is accommodated in the bottomed cylinder part. It can be prevented as much as possible by the body.

  Further, according to the second feature of the present invention, the ventilation member that closes the ventilation hole from the throttle body side is attached to the housing case, and the ventilation member has waterproof breathability, so that water enters the housing case. Ventilation inside the storage case is possible while preventing this, and even if the outer end opening of the ventilation hole faces the throttle body, the storage case is formed separately from the throttle body, It is easy to attach the ventilation member to the housing case.

It is the whole intake control device perspective view. It is sectional drawing which follows the 2-2 line of FIG. FIG. 3 is a sectional view taken along line 3-3 in FIG. 2.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3 attached herewith. First, in FIG. 1 and FIG. 2, the intake control device includes three first intake passages 5. , Second and third throttle bodies 6A, 6B, 6C, and a butterfly throttle valve 7 for controlling the opening degree of each intake passage 5... Traverses the intake passage 5. The throttle valve shafts 8 are rotatably fixed to the third throttle bodies 6A to 6C, respectively. Thus, the first to third throttle bodies 6A to 6C are arranged such that the throttle valve shafts 8 are individually coaxially arranged on the throttle bodies 6A to 6C via bearing bosses 35. The throttle valve shafts 8 are arranged in parallel in the axial direction and are coupled to each other.

  Fuel injection valves 9 for injecting fuel toward the intake passages 5 downstream of the throttle valves 7 are attached to the first to third throttle bodies 6A to 6C, respectively. A delivery pipe 10 for supplying fuel to the fuel injection valves 9 extends in the arrangement direction of the first to third throttle bodies 6A to 6C and is fixed to the throttle bodies 6A to 6C. The delivery pipe 10 is connected in common.

Referring also to FIG. 3, a drive device 11 is interlocked and connected to the throttle valve shafts 8 of the first to third throttle bodies 6 </ b> A to 6 </ b> C. The drive device 11 is connected to the electric motor 12. , consists of a total reduction gear mechanism 13 and for transmitting to the throttle valve shaft 8 ... side rotational power decelerated output from the electric motor 12 is accommodated in the accommodating case 14.

The accommodating case 14, the first to third throttle bodies 6A-6C are formed separately, which is attached taken to the bearing boss 35 ... outer periphery of the first to third throttle bodies 6A-6C, the In the embodiment, the first to third throttle bodies 6A to 6C are made of metal, whereas the first and second case halves 16 and 17 made of synthetic resin are coupled by a plurality of bolts 18. Thus, the housing case 14 is configured, and the housing case 14 is made of synthetic resin.

  The first case half 16 includes a dish-like portion 16a formed along a plane perpendicular to the axis of the throttle valve shaft 8 ..., and a bottomed cylindrical portion 16b continuous at a right angle to one side of the dish-like portion 16a. The second case half 17 is formed in a dish shape corresponding to the dish-like portion 16 a of the first case half 16.

  In addition, a part of the storage case 14 is disposed between two throttle bodies coupled to each other and is sandwiched between the throttle bodies. In this embodiment, the first of the storage case 14 is A part of the dish-like portion 16a and a part of the second case half 17 in the case half 16 are lateral to the first throttle body 6A on one end side in the arrangement direction of the first to third throttle bodies 6A to 6C. The bottomed cylinder portion 16b is disposed so as to be sandwiched between the first throttle body 6A and the second throttle body 6B adjacent to the first throttle body 6A. Thus, a positioning pin 19 is provided between the dish-like portion 16a of the first case half 16 and the first throttle body 6A, and a positioning pin 20 is provided between the second case half 17 and the second throttle body 6B. It is done.

  Of the drive device 11, the electric motor 12 is fixedly arranged coaxially in the bottomed cylindrical portion 16 b in the first case half 16 of the housing case 14, and an output shaft 21 of the electric motor 12, The reduction gear mechanism 13 is provided between the throttle valve shaft 8 of the first throttle body 6A. A connector portion 17a for connecting an external electric wire to the electric motor 12 is opposite to the bottomed cylindrical portion 16b at a portion of the housing case 14 corresponding to the electric motor 12 of the second case half 17. So as to project integrally.

  A throttle sensor 22 that detects the amount of rotation of the throttle valve shaft 8, that is, the opening of the throttle valve 7, is connected to one end of the throttle valve shaft 8 that is rotatably supported by the first throttle body 6A. Further, the other end of the throttle valve shaft 8 of the first throttle body 6A and one end of the throttle valve shaft 8 of the second throttle body 6B penetrate the housing case 14 in an airtight and rotatable manner so as to rotate freely. It is rushed into.

  The reduction gear mechanism 13 has a drive gear 23 fixed to the output shaft 21 of the electric motor 12 and an axis parallel to the rotation axis of the electric motor 12, and both ends are supported by the housing case 14. A first idle gear 25 rotatably supported by the idle shaft 24 and meshing with the drive gear 23, a second idle gear 26 formed integrally with the first idle gear 25, and a throttle valve shaft in the first throttle body 6A 8 is composed of a driven gear 27 fixed to the other end of the gear 8 and meshed with the second idle gear 26. The driven gear 27 is formed as a sector gear.

  A first lever 28 is supported on the other end of the throttle valve shaft 8 in the first throttle body 6A so as to be relatively rotatable. The first lever 28 and the first case half 16 of the housing case 14 are supported. Between them, a torsion spring 29 is provided. In addition, the first lever 28 is urged to rotate toward the open side of the throttle valve 7 by the spring force exerted by the torsion spring 29, and the first lever 28 abuts against the driven gear 27 in the urging direction. Combined. Thus, when the driven gear 27 rotates to close the throttle valve 7, the first lever 28 is pushed by the driven gear 27 and rotates, and when the driven gear 27 rotates to open the throttle valve 7. Further, the first lever 28 is rotated so as to follow the driven gear 27 by the spring force exerted by the torsion spring 29.

  Moreover, the first lever 28 is engaged with a second lever 30 fixed to one end of the throttle valve shaft 8 in the second throttle body 6B, and the throttle valve shaft 8 of the first and second throttle bodies 6A, 6B. ... Will rotate in conjunction with each other, and the same interlocking structure between the first and second throttle bodies 6A and 6B is also provided between the throttle valve shafts 8 of the second and third throttle bodies 6B and 6C. A structure is provided.

  A portion of the side wall of the housing case 14 that faces the first throttle body 6A is provided with a first ventilation hole 31 for ventilating the inside of the housing case 14, and is separate from the first ventilation hole 31. In this embodiment, one second ventilation hole 32 is provided on the side wall of the housing case 14.

  Referring to FIG. 2, the first ventilation hole 31 is formed on the side wall of the dish-like portion 61 a of the first case half 16, which is a part of the housing case 14, and the bottomed cylindrical portion 16 b continues. A portion facing the body 6A is provided so as to be covered from the outside by the first throttle body 6A, a small-diameter hole portion 31a, a medium-diameter hole portion 31b having a larger diameter than the small-diameter hole portion 31a, A large-diameter hole portion 31c having a diameter larger than that of the medium-diameter hole portion 31b is continuously and coaxially connected from the inside, and a membrane-like first ventilation member 33 having waterproof breathability is provided as the first ventilation member 33. The ventilation hole 31 is attached to the first case half 16 of the housing case 14 so as to be closed from the first throttle body 6A side. In this embodiment, the ventilation hole 31 is larger than the medium diameter hole 31b in the first ventilation hole 31. First ventilation formed in a circular shape Material 33 is adhered to the stepped portion 31d formed between the first middle diameter portion 31b of the ventilation hole 31 and the large-diameter hole portion 31c.

  Further, in this embodiment, the second ventilation hole 32 is displaced from the portion sandwiched between the first and second throttle bodies 6A and 6b in the second case half 17 constituting a part of the housing case 14. The second ventilation member 34, which is provided at a position that is waterproof and breathable, is attached to the second case half 17 of the housing case 14 by adhesion or the like so as to close the second ventilation hole 32. .

  Next, the operation of this embodiment will be described. A drive device 11 including an electric motor 12 is interlocked and connected to the throttle valve shafts 8 so as to rotationally drive the throttle valve shafts 8. A housing case 14 for housing is formed separately from the first to third throttle bodies 6A to 6C and is attached to the first and second throttle bodies 6A and 6B, and the first ventilation hole 31 is formed in the housing case 14. Therefore, it is easy to provide the first ventilation hole 31 on the side wall of the housing case 14 by molding or processing, and in order to change the arrangement position of the first ventilation hole 31, the first throttle body is provided. Regardless of 6A, it is only necessary to newly form the housing case 14, and an increase in cost can be suppressed.

A first ventilation hole 31 that opens to the outside of the first throttle body 6A is formed in a portion of the side wall of the housing case 14 that faces the first throttle body 6A with a space therebetween . A bottomed cylindrical portion 16b that protrudes toward the first throttle body 6A is provided on the side wall so as to be covered from the outside by a first throttle body 6A spaced apart from the bottom. Since the electric motor 12 is accommodated in the cylindrical portion 16b, the entry of foreign matter from the first ventilation hole 31 into the accommodation case 14 can be prevented as much as possible by the first throttle body 6A. In particular, in this embodiment, a part of the housing case 14 is disposed between the first and second throttle bodies 6A and 6B, and is housed in a portion disposed between the first and second throttle bodies 6A and 6b. Since the first ventilation hole 31 is provided in the side wall of the case 14, the first throttle body 6 </ b> A is disposed close to the outer end opening of the first ventilation hole 31, and is accommodated from the first ventilation hole 31. Intrusion of foreign matter into the case 14 can be prevented more reliably.

  Moreover, since the first ventilation member 33 having waterproof breathability is attached to the accommodation case 14 so as to close the first ventilation hole 31 from the first throttle body 6A side, water enters the accommodation case 14. Can be ventilated in the housing case 14, and even if the outer end opening of the first ventilation hole 31 faces the first throttle body 6A, the housing case 14 is different from the first throttle body 6A. Since it is formed separately, the first ventilation member 33 can be easily attached to the housing case 14.

  In addition, since at least one (one in this embodiment) second ventilation hole 32 different from the first ventilation hole 31 is provided on the side wall of the housing case 14, the ventilation performance can be improved. The layout of the second ventilation hole 32 for improving the ventilation performance is easy.

  In addition, since the second ventilation member 34 having waterproof breathability is attached to the accommodation case 14 so as to close the second ventilation hole 32, the second ventilation member 32 is provided in the accommodation case 14 from the second ventilation hole 32 for improving the ventilation performance. The inside of the housing case 14 can be ventilated while preventing water from entering, and the second ventilation member 34 can be disposed in a place where it can be easily attached. .

  Furthermore, since a part of the storage case 14 is sandwiched between the first and second throttle bodies 6A and 6B, it is difficult to secure a space for arranging the ventilation hole on the side wall of the storage case 14. Since the first ventilation hole 31 is provided in the housing case 14 at a portion facing the first throttle body 6A, it is easy to secure a space for arranging the second ventilation hole 32, and the second ventilation hole 32 is provided. The layout is easy. Further, the second ventilation member 34 that closes the second ventilation hole 32 can be disposed in a place where the attachment is easy, and the layout of the second ventilation member 34 is facilitated.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

  For example, in the above-described embodiment, the intake control device in which the first to third throttle bodies 6A to 6C are coupled to each other has been described. However, in the present invention, a pair of throttle bodies are coupled to each other. The first and second features of the present invention can also be applied to an intake control device having a single throttle body.

5 ... intake passages 6A, 6B ... throttle body 7 ... throttle valve 8 ... throttle valve shaft 11 ... drive device 12 ... electric motor 14 ... housing case 16b ... with Bottom cylinder part 31 ... 1st ventilation hole 32 ... 2nd ventilation hole 33 ... 1st ventilation member 34 ... 2nd ventilation member 35 ... Bearing boss

Claims (2)

A throttle valve (7) for controlling the opening of an intake passage (5) provided in the throttle body (6A) is fixed to a throttle valve shaft (8) rotatably supported on the throttle body (6A), A drive device (11) including an electric motor (12) and the entire reduction gear mechanism (13 ) is interlocked and connected to the throttle valve shaft (8) so as to rotationally drive the throttle valve shaft (8). In the air intake control device in which a ventilation hole (31) for ventilation in the housing case (14) is provided on a side wall of the housing case (14) that houses the drive device (11).
Wherein the housing case formed separately from the throttle body (6A) (14) is, with taken into the outer periphery of the throttle body (6A), the bearing boss for holding the throttle valve shaft (8) (35) is, among the side walls of the housing case (14), wherein the portion facing spaced throttle body (6A), said ventilation hole (31) which opens to the outside of the throttle body (6A) is the A bottomed cylindrical portion (provided to be covered from the outside by the throttle body (6A) spaced apart from the ventilation hole (31)) and projecting to the throttle body (6A) side on the side wall 16b), and the electric motor (12) is accommodated in the bottomed cylindrical portion (16b).   The ventilation member (33) having waterproof breathability is attached to the housing case (14) so as to close the ventilation hole (31) from the throttle body (6A) side. Intake control device.

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