JP5701186B2 - Intake device for internal combustion engine - Google Patents

Description

  The present invention relates to an intake device for an internal combustion engine that controls the amount of air taken into the internal combustion engine.

  As a prior art of an intake device for an internal combustion engine, Patent Document 1 discloses an intake manifold that forms a receiving portion on the inner wall on the downstream side of an intake passage, and a first gap formed between the inner and outer periphery in a state of being attached to the receiving portion. And an open / close valve mechanism that forms a second gap in the axial direction, and a technique of disposing an elastic member in the second gap is disclosed. In the technique of Patent Document 1, the intake device of the internal combustion engine having such a structure prevents the on-off valve mechanism from being deformed to suppress the generation of abnormal noise, thereby preventing the durability of the on-off valve mechanism from being lowered.

JP 2010-1855 A

  However, in the technique of Patent Document 1, since the on-off valve mechanism has no restrained portion, the operation of the on-off valve mechanism may be affected by the vibration of the engine. If the operation of the on-off valve mechanism is affected in this way, air cannot be stably taken into the internal combustion engine.

  Further, in the conventional intake device for an internal combustion engine, the intake manifold, the throttle body, and the air duct are assembled together by fastening them with bolts. However, at this time, at least a bolt for fastening the intake manifold and the throttle body and a bolt for fastening the throttle body and the air duct are necessary. Therefore, it is necessary to prepare and fasten two or more bolts. Alternatively, when fastening, it may be necessary to prepare an adapter (auxiliary member) separately and fasten it. Thus, since the number of parts increases, manufacturing cost and assembly man-hour increase.

  Further, when the intake manifold and the throttle body are fastened with bolts, the vibration of the engine may be transmitted to the throttle body via the intake manifold and the bolts, which may affect the opening / closing operation of the throttle valve.

  Furthermore, when the intake manifold, the throttle body, and the air duct are formed of a low-rigidity material such as resin, separate parts such as an insert member for fastening the bolt are necessary. For this reason, the number of parts is further increased, which further increases the manufacturing cost and the number of assembling steps.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide an intake device for an internal combustion engine that can reduce the manufacturing cost and the number of assembly steps.

  One aspect of the present invention made to solve the above-described problems is an intake manifold that supplies air to an internal combustion engine, an air duct that supplies the air to the intake manifold, and the air that is supplied from the air duct to the intake manifold. An intake device for an internal combustion engine having a throttle body for controlling the amount of the body, wherein the body body of the throttle body is disposed concentrically inside an inner peripheral surface of a receiving portion provided on the air inlet side of the intake manifold. The air inlet side end of the body main body, the air outlet side end of the air duct, and the air inlet side end of the receiving part that are arranged in order from the inside to the outside are fastening bands. The intake manifold, the air duct, and the spacer. That the Ttorubode are fixed, characterized by.

  According to this aspect, the air inlet side end of the body body of the throttle body, the air outlet side end of the air duct, and the air inlet side end of the intake portion of the intake manifold are concentric. Are arranged in order from the inside to the outside, and are fastened together by a fastening band. As a result, the throttle body, the air duct, and the intake manifold are fixed. Thus, a plurality of parts are fixed together by the fastening band, and the intake device of the internal combustion engine is assembled with a small number of parts. Therefore, manufacturing cost and assembly man-hour can be reduced.

  In the above aspect, the air duct includes a seal portion that secures sealing performance between an inner peripheral surface of the outlet side end portion and an outer peripheral surface of the inlet side end portion of the body main body, It is preferable to provide a groove portion in which the fastening band is disposed on the outer peripheral surface of the outlet side end portion.

  According to this aspect, the air duct includes a seal portion that secures sealing performance between the inner peripheral surface of the outlet side end portion and the outer peripheral surface of the inlet side end portion of the body of the throttle body, and the outlet side end. A groove portion in which a fastening band is disposed on the outer peripheral surface of the portion. Thus, since the fastening band is arranged via the air duct with respect to the body body of the throttle body, the body body of the throttle body is not distorted by the fastening force of the fastening band. Moreover, the sealing performance between the body body of the throttle body and the air duct can be reliably ensured by the seal portion of the air duct. Therefore, the sealing performance between the throttle body and the air duct can be ensured without affecting the operation of the throttle valve built in the throttle body.

  In the above aspect, preferably, the throttle body includes a bearing portion that supports a shaft of a throttle valve, and the air duct includes a guide portion that fits with the bearing portion.

  According to this aspect, the throttle body includes the bearing portion that supports the shaft of the built-in throttle valve, and the air duct includes the guide portion that engages with the bearing portion. Therefore, it is possible to prevent relative rotation between the throttle body and the air duct.

  In the above aspect, an elastic body is disposed between the inner peripheral surface of the air outlet side end of the receiving portion and the outer peripheral surface of the air outlet side end of the body main body. Are preferred.

  According to this aspect, the elastic body is disposed between the inner peripheral surface of the air outlet side end portion of the receiving portion of the intake manifold and the outer peripheral surface of the air outlet side end portion of the body of the throttle body. ing. In this manner, the outlet side end of the body body of the throttle body is disposed inside the inner peripheral surface of the outlet side end of the intake manifold receiving portion via the elastic body, so that the engine is connected to the intake manifold. It is possible to suppress the transmitted vibration from being transmitted to the throttle body.

  In the above aspect, the inlet side end of the receiving portion is formed in a part in the circumferential direction, and a cut formed in a part in the circumferential direction at the outlet side end of the air duct. It is preferable that it fits into the notch.

  According to this aspect, the inlet side end portion of the intake manifold receiving portion is formed in a part in the circumferential direction, and the notch is formed in a part in the circumferential direction at the outlet side end portion of the air duct. It is mated with the part. Thereby, it can prevent rotating relatively between an intake manifold and an air duct.

  In the above aspect, the fastening band includes a concave portion formed in a concave shape along a circumferential direction, and at least one inlet side end portion of the receiving portion is fitted to the concave portion of the fastening band. It is preferable to provide a convex portion.

  According to this aspect, the fastening band includes a concave portion formed in a concave shape along the circumferential direction, and at least one inflow side end portion of the receiving portion of the intake manifold includes a convex portion that fits into the concave portion of the fastening band. . Thereby, it is possible to prevent the fastening band from rotating, for example, when the intake device is assembled.

  In said aspect, it is preferable that the said inlet side edge part of the said receiving part is provided with the nail | claw part formed so that it might protrude in the radial direction outermost part at the said air inlet side.

  According to this aspect, the inlet side end portion of the intake portion of the intake manifold includes the claw portion formed so as to protrude radially outward at the most distal end portion on the air inlet side. Therefore, it is possible to prevent the fastening band from coming out to the inlet side from the inlet side end portion of the receiving portion of the intake manifold. Therefore, the assembly position of the fastening band can be prevented from moving.

  In the above aspect, the projection body has a projection protruding radially outward from the outer peripheral surface of the body body, and a through-hole penetrating the receiving portion in the radial direction, and at least a part of the projection is the It is preferable that it is disposed inside the through hole.

  According to this aspect, it has a projection that protrudes radially outward from the outer peripheral surface of the body body of the throttle body, and a through hole that penetrates the receiving portion of the intake manifold in the radial direction. At least a portion is disposed inside the through hole. Therefore, for example, when the intake device is disassembled, the throttle body can be prevented from dropping or dropping from the intake manifold.

  With the intake device for an internal combustion engine according to the present invention, the manufacturing cost and assembly man-hour can be reduced.

It is a top view of the intake device of the internal combustion engine of the present invention. It is the figure (front view of the intake device of the internal combustion engine of this invention) which looked at the intake device of the internal combustion engine of this invention from the lower side of FIG. It is the figure which decomposed | disassembled the intake device of the internal combustion engine of this invention. It is the figure which decomposed | disassembled the intake device of the internal combustion engine of this invention. It is an external appearance perspective view of the fastening band of an open state. It is an external appearance perspective view of the fastening band of a fastening state. It is AA sectional drawing of FIG. It is a figure which shows the case where a gasket is assembled | attached instead of an O-ring. It is a figure which shows a modification.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described in detail with reference to the accompanying drawings.

[Outline of intake system]
First, an intake device 1 for an internal combustion engine according to this embodiment will be described with reference to FIGS. Here, FIG. 1 is a top view of the intake device 1, and FIG. 2 is a view (a front view of the intake device 1) of the intake device 1 seen from the lower side of FIG. 3 and 4 are exploded views of the intake device 1, FIG. 3 is a view seen from the same direction as FIG. 1, and FIG. 4 is a view seen from the same direction as FIG. 5 is an external perspective view of the fastening band 16 in an open state, and FIG. 6 is an external perspective view of the fastening band 16 in a fastening state.

  As shown in FIGS. 1 to 4, the intake device 1 includes an intake manifold 10, a throttle device 12, an air duct 14, a fastening band 16, and the like. As will be described in detail later, the intake manifold 10, the throttle body 18 of the throttle device 12, and the air duct 14 are fixed together by a fastening band 16.

  The intake manifold 10 is attached to an engine (internal combustion engine) (not shown) at the end opposite to the side where the throttle device 12 is disposed. The intake manifold 10 includes a passage 20 (see FIG. 7) that supplies air to the engine. The material of the intake manifold 10 is resin or aluminum.

  The throttle device 12 includes a throttle body 18, an angle sensor 22, a throttle lever 24, a throttle valve 26 (see FIG. 7), and the like. The throttle body 18 includes a cylindrical body main body 28 and bearing portions 32 a and 32 b formed radially from the outer peripheral surface 30 of the body main body 28. The bearing portions 32 a and 32 b are bearing portions that support a shaft connecting the angle sensor 22 and the throttle lever 24 in the throttle valve 26. The throttle lever 24 is disposed with respect to the body main body 28 via a bearing portion 32a. Moreover, the angle sensor 22 is arrange | positioned through the bearing part 32b with respect to the body main body 28. As shown in FIG. The material of the throttle body 18 is resin or aluminum.

  The throttle device 12 having such a structure adjusts the valve opening degree by operating the throttle lever 24 while the rotation angle of the throttle valve 26 is detected by the angle sensor 22. In this manner, the throttle device 12 controls the amount of air supplied from the air duct 14 to the intake manifold 10 in the throttle body 18.

  The air duct 14 is formed in a cylindrical shape, and an end portion on the inlet side (right side in FIGS. 1 and 2) is attached to an air cleaner (not shown). The air duct 14 includes a flow path 36 (see FIG. 7) for supplying air to the intake manifold 10 (via a flow path 34 (see FIG. 7) of the body 28 of the throttle body 18). The material of the air duct 14 is rubber.

  As shown in FIGS. 5 and 6, the fastening band 16 includes an annular band member 38, a screw 40, a pair of stay members 42a and 42b, and a concave member 44 integrated with the stay member 42a. A spacer 45 and a nut member 47 are provided. The concave member 44 is formed in a concave shape so as to be recessed outward in the radial direction along the circumferential direction of the fastening band 16. The nut member 47 has an outer diameter that is hexagonal. The nut member 47 is provided with a screw hole that forms a female screw portion, and the stay member is in a state where the screw hole is disposed coaxially with the hole 49 of the stay member 42b (the central axis is the same). 42b is fixed.

  When the fastening band 16 having such a configuration is in an open state before fastening the parts, the screw 40 integrated with the stay member 42a is opened from the other stay member 42b as shown in FIG. Then, as shown in FIG. 6, the male screw portion of the screw 40 is fitted and fastened with the female screw portion of the nut member 47 fixed to the stay member 42 b, thereby fastening the band member 38 and the concave member 44 in the radial direction. A fastening force can be applied to the components disposed inside (in this embodiment, intake manifold 10, throttle body 18, and air duct 14). The spacer 45 defines the tightening degree of the band member 38.

  In the intake device 1 having such a structure, the air cleaned by the air cleaner is sent to the inside of the throttle body 18 of the throttle device 12 through the air duct 14. Then, air is sent to the engine via the intake manifold 10 while controlling the amount of air by opening and closing the throttle valve 26 inside the throttle body 18.

[Detailed description of fixing structure]
Next, details of the fixing structure of the intake manifold 10, the air duct 14, and the throttle body 18 will be described. Here, FIG. 7 is an AA cross-sectional view of FIG.

  In the present embodiment, as shown in FIG. 7, the intake manifold 10 includes a receiving portion 50 on the air inlet side. A body main body 28 of the throttle body 18 is disposed inside the inner peripheral surface of the receiving portion 50. Then, the downstream end of the flow path 36 of the air duct 14 is arranged radially outward with respect to the inlet side end 46 that is the air inlet of the upstream end of the flow path 34 of the body main body 28. An outlet side end portion 48 that is an outlet for air is disposed. Further, an air inlet side end portion 52 of the receiving portion 50 of the intake manifold 10 is disposed on the outer side in the radial direction with respect to the outlet side end portion 48 of the air duct 14. That is, concentrically from the inside to the outside (from the inside to the outside in the radial direction), the inlet side end 46 of the body 28, the outlet side end 48 of the air duct 14, and the inlet of the receiving part 50. The side end portions 52 are arranged in this order.

  Further, as shown in FIG. 7, the fastening band 16 is disposed on the outer side in the radial direction of the receiving portion 50 of the intake manifold 10. The inlet side end 46 of the body 28, the outlet side end 48 of the air duct 14, and the inlet side end 52 of the receiving part 50 are collectively brought together from the outside in the radial direction by one fastening band 16. It is tightened. In this way, the intake manifold 10, the air duct 14, and the throttle body 18 are fixed by one fastening band 16.

  In this way, the inlet side end portion 46 of the throttle body 18, the outlet side end portion 48 of the air duct 14, and the inlet side end portion 52 of the receiving portion 50, which are laminated in the radial direction, form one fastening band 16. The intake manifold 10, the air duct 14, and the throttle body 18 are fixed by being tightened together. Thus, the three parts are fixed together by one fastening band 16, and the intake device 1 is assembled with a small number of parts. Therefore, the manufacturing cost and assembly process of the intake device 1 can be reduced.

  The body 28 of the throttle body 18 is disposed inside the receiving portion 50 of the intake manifold 10 via the outlet side end 48 of the rubber air duct 14 with respect to the receiving portion 50. Therefore, vibration transmitted from the engine to the intake manifold 10 is difficult to be transmitted to the throttle body 18. Therefore, the earthquake resistance of the throttle body 18 can be improved.

  Further, between the fastening band 16 and the throttle body 18, an outlet side end 48 of the rubber air duct 14 is disposed. Therefore, an excessive stress caused by the fastening force of the fastening band 16 does not act on the throttle body 18 due to the buffering action of the outlet side end 48 of the air duct 14. Therefore, it is possible to prevent the throttle body 18 from being distorted due to the fastening force of the fastening band 16.

  In addition, the inlet side end 46 of the body 28 of the throttle body 18 is loosely press-fitted into the outlet side end 48 of the air duct 14. Furthermore, the air duct 14 includes a seal portion 56 on the inner peripheral surface 54 of the outlet side end portion 48. A sealing property is ensured between the seal portion 56 and the outer peripheral surface 58 of the inlet side end portion 46 of the body main body 28. In addition, the seal portion 56 includes a plurality of grooves 60 formed along the circumferential direction of the air duct 14. Thereby, the air duct 14 and the throttle body 18 can be reliably fixed while improving the sealing performance.

  In the example shown in FIG. 7, the outer peripheral surface 58 of the inlet side end 46 of the throttle body 18 is formed flat. However, the present invention is not limited to this, and the outer peripheral surface 58 extends along the circumferential direction of the throttle body 18. A plurality of convex lines may be provided. At this time, the convex line is fitted to the groove 60 of the outlet side end 48 of the air duct 14.

  In addition, as shown in FIG. 4, the air duct 14 includes a total of two pairs of guide portions 62 a and 62 b at the outlet side end portion 48. The pair of guide portions 62a and 62b are formed so as to protrude from the outlet side end portion 48 to the side where the throttle body 18 is disposed. The pair of guide portions 62a and 62b includes a gap δ between one guide portion 62a and the other guide portion 62b. The bearing portions 32a and 32b of the throttle body 18 are inserted into the gap δ, whereby the pair of guide portions 62a and 62b are engaged with the bearing portions 32a and 32b of the throttle body 18. In this manner, relative rotation between the air duct 14 and the throttle body 18 can be prevented.

  Further, as shown in FIG. 7, the inner peripheral surface 63 of the outlet side end portion 53, which is the end portion on the air outlet side of the receiving portion 50 of the intake manifold 10 in the radial direction, and the body main body 28 of the throttle body 18. An O-ring 66 that is an elastic body is disposed between the outer peripheral surface 65 of the outlet side end 64 that is the end of the air outlet. Further, as described above, the outlet side end portion 48 of the air duct 14 is provided between the inlet side end portion 52 of the receiving portion 50 of the intake manifold 10 and the inlet side end portion 46 of the throttle body 18 of the throttle device 12. Is arranged. Thus, in the axial direction, there is a space between the inlet side end 46 and the outlet side end 64 of the throttle body 18 and between the throttle body 18 and the receiving part 50 in the radial direction. S is provided.

  Since the space S is provided in this way, the throttle body 18 and the receiving portion 50 do not directly contact each other. Thereby, it is possible to suppress the vibration transmitted from the engine to the intake manifold 10 from being transmitted to the throttle body 18. Instead of the O-ring 66, a gasket 68 or other elastic body may be assembled as shown in FIG.

  As shown in FIGS. 3 and 4, the inlet-side end 52 of the receiving portion 50 of the intake manifold 10 is formed only in a part of the receiving portion 50 in the circumferential direction of the main body 70. More specifically, the inlet side end portion 52 of the receiving portion 50 is formed at two positions symmetrical with respect to the central axis in the circumferential direction of the main body portion 70 in the receiving portion 50. And the inflow port side edge part 52 of the receiving part 50 is formed so that it may protrude toward the side by which the air duct 14 is arrange | positioned from the main-body part 70. As shown in FIG.

  On the other hand, a notch 74 is formed in a part in the circumferential direction at the outlet side end 48 of the air duct 14. More specifically, the notches 74 are formed at two locations symmetrical with respect to the central axis in the circumferential direction of the outlet 48 on the outlet side of the air duct 14. The notch 74 is formed so as to penetrate the outlet side end 48 in the central axis direction so as to be notched inward in the radial direction. The inlet side end 52 of the receiving portion 50 of the intake manifold 10 is fitted with the notch 74 of the air duct 14. Thereby, it can prevent rotating relatively between the intake manifold 10 and the air duct 14.

  In the example shown in FIG. 7, the inlet side end 52 and the notch 74 of the receiving portion 50 of the intake manifold 10 are located on the top side when the intake device 1 is mounted on the vehicle (upper side). Position and lower position). However, the present invention is not limited to this example, and the inlet side end portion 52 and the cutout portion 74 of the receiving portion 50 of the intake manifold 10 may be disposed at other positions. Further, in the example shown in FIG. 7, the inlet side end portions 52 of the receiving portion 50 of the intake manifold 10 are formed at two locations in the circumferential direction, but the present invention is not limited to this, and the inlet port of the receiving portion 50 of the intake manifold 10 is formed. The side end 52 may be formed only at one place in the circumferential direction, or may be formed at three or more places in the circumferential direction.

  Further, the inlet side end 52 of the receiving portion 50 of the intake manifold 10 is formed to protrude outward in the radial direction at the most distal end portion on the air inlet side (side where the air duct 14 is disposed). The claw portion 76 is provided. Thus, since the inflow side end 52 of the receiving part 50 is provided with the claw 76, the fastening band 16 can be prevented from coming off to the side where the air duct 14 is arranged in the axial direction.

  Further, one inlet side end portion 52 of the receiving portion 50 of the intake manifold 10 includes a convex portion 78 formed so as to protrude outward in the radial direction. The convex portion 78 is engaged with the concave member 44 of the fastening band 16. Thereby, it can prevent that the fastening band 16 rotates.

  In the example shown in FIG. 7 and the like, the convex portion 78 is disposed at a position on the upper side when the intake manifold 10 is attached to the engine. However, the present invention is not limited to this, and the convex portions 78 may be arranged at other positions. However, if the convex portion 78 is arranged at an upper position as shown in FIG. 7, there is an advantage that the fastening band 16 can be easily tightened.

  Further, as shown in FIG. 4, the intake manifold 10 is provided with a notch 80 formed in a notch shape so that the bearings 32 a and 32 b of the throttle body 18 can be inserted.

  Moreover, the air duct 14 is provided with the groove part 82 by which the groove | channel was formed in the outer peripheral surface 72 of the outflow port side edge part 48 along the circumferential direction, as shown in the said FIG.3 and FIG.4. The fastening band 16 is disposed in the groove portion 82. The air duct 14 includes a pair of ribs 84a and 84b on both sides of the groove 82 in the axial direction. In this way, the ribs 84a and 84b prevent the fastening band 16 from coming off the air duct 14 in the axial direction. Further, the air duct 14 includes a notch 74 at the outlet side end 48. This notch 74 is formed in two places on the top and bottom. The inlet end 52 of the receiving portion 50 of the intake manifold 10 is fitted into the notch 74.

  As another modification, as shown in FIG. 9, the receiving portion 50 of the intake manifold 10 may be provided with a through hole 86, and a screw 88 may be fastened to the body main body 28 of the throttle body 18. The through hole 86 is formed to penetrate the receiving portion 50 in the radial direction. Further, the screw 88 protrudes radially outward from the outer peripheral surface 30 of the body main body 28 of the throttle body 18. A part of the screw 88 protrudes outward in the radial direction from the inner peripheral surface of the receiving portion 50, and is disposed inside the through hole 86.

  Thus, for example, when the intake device 1 is disassembled, the screw 88 is caught in the through-hole 86 even if the body 28 of the throttle body 18 is about to be detached from the receiving portion 50 of the intake manifold 10. Therefore, it is possible to prevent the body main body 28 of the throttle body 18 from dropping from the receiving portion 50 of the intake manifold 10.

  In the example illustrated in FIG. 9, the through hole 86 and the screw 88 are disposed at a position that is the ground side (a position that is the lower side) when the intake device 1 is mounted on the vehicle. However, the present invention is not limited to this example, and the through hole 86 and the screw 88 may be arranged at other positions. However, if the through-hole 86 and the screw 88 are arranged at the ground side as shown in FIG. 9, the through-hole 86 can be shared as a hole for the water that has entered between the intake manifold 10 and the throttle body 18. .

[Effect of this embodiment]
The effects of the present embodiment as described above can be explained as follows. According to the present embodiment, the air inlet side end 46 of the body 28 of the throttle body 18, the air outlet side end 48 of the air duct 14, and the air inlet of the receiving portion 50 of the intake manifold 10. The side end portions 52 are concentrically arranged in order from the inside to the outside, and are tightened together by the fastening band 16. Thus, the intake manifold 10, the air duct 14, and the throttle body 18 are fixed. In this way, the plurality of parts are fixed together by the fastening band 16, and the intake device 1 is assembled with a small number of parts. Therefore, manufacturing cost and assembly man-hour can be reduced.

  Further, since the throttle body 18 is inserted into the receiving portion 50 of the intake manifold 10, the size can be reduced. If the throttle body 18 protrudes from the receiving portion 50 of the intake manifold 10 in the axial direction, it is necessary to extend the escape portion of the air duct 14 from the throttle body 18 to the outside, resulting in an increase in size.

  The air duct 14 includes a seal portion 56 that secures a sealing property between the inner peripheral surface 54 of the outlet side end 48 and the outer peripheral surface 58 of the inlet side end 46 of the body 28 of the throttle body 18; A groove portion 82 in which the fastening band 16 is disposed on the outer peripheral surface 72 of the outlet side end portion 48. Thus, the fastening band 16 is disposed via the air duct 14 with respect to the body main body 28 of the throttle body 18, so that the body main body 28 of the throttle body 18 is not distorted by the fastening force of the fastening band 16. Further, the sealing portion 56 of the air duct 14 can ensure the sealing performance between the air duct 14 and the body main body 28 of the throttle body 18. Therefore, the sealing performance between the air duct 14 and the throttle body 18 can be ensured without affecting the operation of the throttle valve 26 built in the throttle body 18.

  Further, the throttle body 18 includes bearing portions 32a and 32b that support the shaft of the throttle valve 26 incorporated therein, and the air duct 14 includes a pair of guide portions 62a and 62b fitted to the bearing portions 32a and 32b. Therefore, relative rotation between the air duct 14 and the throttle body 18 can be prevented.

  Further, an O-ring 66 or a gasket is provided between the inner peripheral surface 63 of the outlet side end 53 of the receiving portion 50 of the intake manifold 10 and the outer peripheral surface 65 of the outlet side end 64 of the body body 28 of the throttle body 18. 68 is arranged. As described above, the outlet side end portion 64 of the body 28 is disposed inside the inner peripheral surface 63 of the outlet side end portion 53 of the receiving portion 50 via the elastic body. Transmission of the transmitted vibration to the throttle body 18 can be suppressed.

  In addition, the inlet side end 52 of the receiving portion 50 of the intake manifold 10 is formed in a part in the circumferential direction, and a cut formed in a part in the circumferential direction at the outlet side end 48 of the air duct 14. The notch 74 is fitted. Thereby, it can prevent rotating relatively between the intake manifold 10 and the air duct 14.

  Further, the fastening band 16 includes a concave member 44 formed in a concave shape along the circumferential direction, and the inlet side end portion 52 of the receiving portion 50 of the intake manifold 10 is a convex portion that fits with the concave member 44 of the fastening band 16. 78. Thereby, for example, when the intake device 1 is assembled, the fastening band 16 can be prevented from rotating.

  In addition, the inlet side end 52 of the receiving portion 50 of the intake manifold 10 includes a claw portion 76 formed so as to protrude radially outward at the most distal end portion on the air inlet side. Therefore, the fastening band 16 can be prevented from coming off from the inlet side end 52 of the receiving part 50 to the inlet side. Therefore, it is possible to prevent the assembly position of the fastening band 16 from moving.

  Further, the screw 88 has a screw 88 projecting radially outward from the outer peripheral surface 30 of the body 28 of the throttle body 18 and a through hole 86 penetrating the receiving portion 50 of the intake manifold 10 in the radial direction. At least a portion is disposed inside the through hole 86. Therefore, for example, when the intake device 1 is disassembled, the throttle body 18 can be prevented from dropping or dropping from the intake manifold 10.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Intake device 10 Intake manifold 12 Throttle device 14 Air duct 16 Fastening band 18 Throttle body 28 Body main body 32a Bearing part 32b Bearing part 46 (Body body) Inlet side end 48 (Air duct) Outlet side end 50 Receiving part 52 (in the receiving part) inlet side end part 53 (in the receiving part) outlet side end part 56 seal part 62a guide part 62b guide part 63 (in the outlet part end part in the receiving part) inner peripheral surface 64 (body body) Outlet side end portion 65 (outlet side end portion of body body) outer peripheral surface 66 O-ring 74 Notch portion (of air duct) 76 Claw portion 78 Convex portion 86 Through hole 88 Screw

Claims (8)

In an intake system for an internal combustion engine, comprising: an intake manifold that supplies air to the internal combustion engine; an air duct that supplies the air to the intake manifold; and a throttle body that controls the amount of air supplied from the air duct to the intake manifold. ,
A body body of the throttle body is disposed inside an inner peripheral surface of a receiving portion provided on the air inlet side of the intake manifold;
The air inlet side end of the body body, the air duct side end of the air duct, and the air inlet side end of the receiving part, which are concentrically arranged in order from the inside to the outside, The intake manifold, the air duct, and the throttle body are fixed by being tightened together with a fastening band;
An intake device for an internal combustion engine characterized by the above. The intake device for an internal combustion engine according to claim 1,
The air duct includes a seal portion that secures sealing performance between an inner peripheral surface of the outlet side end portion and an outer peripheral surface of the inlet side end portion of the body main body, and an outer periphery of the outlet side end portion. Comprising a groove part in which the fastening band is arranged on the surface;
An intake device for an internal combustion engine characterized by the above. The intake device for an internal combustion engine according to claim 1 or 2,
The throttle body includes a bearing portion that supports a throttle valve shaft;
The air duct includes a guide portion that fits with the bearing portion;
An intake device for an internal combustion engine characterized by the above. The intake device for an internal combustion engine according to any one of claims 1 to 3,
An elastic body is disposed between an inner peripheral surface of the air outlet side end portion of the receiving portion and an outer peripheral surface of the air outlet side end portion of the body body;
An intake device for an internal combustion engine characterized by the above. The intake device for an internal combustion engine according to any one of claims 1 to 4,
The inlet side end of the receiving part is formed in a part in the circumferential direction, and is fitted with a notch part formed in a part in the circumferential direction at the outlet side end of the air duct. That
An intake device for an internal combustion engine characterized by the above. The intake device for an internal combustion engine according to claim 5,
The fastening band includes a recess formed in a concave shape along the circumferential direction,
At least one inlet side end of the receiving part includes a convex part that fits into the concave part of the fastening band;
An intake device for an internal combustion engine characterized by the above. The intake device for an internal combustion engine according to claim 5 or 6,
The inlet side end portion of the receiving portion includes a claw portion formed so as to protrude radially outward at the most distal portion on the air inlet side;
An intake device for an internal combustion engine characterized by the above. The intake device for an internal combustion engine according to any one of claims 1 to 7,
A protrusion projecting radially outward from the outer peripheral surface of the body body;
A through hole penetrating the receiving portion in the radial direction,
At least a part of the protrusion is disposed inside the through hole;
An intake device for an internal combustion engine characterized by the above.

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