JP2018084146A - Intake pipe support structure to engine or vehicle body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake pipe support structure to an engine or a vehicle body, capable of absorbing relatively large displacement of an intake pipe even when a flexible tube cannot be interposed and of maintaining fixation of the intake pipe to the engine or the vehicle body in a supporting manner.SOLUTION: A rubber bush 130 is interposed when an intake pipe is fixed to an engine or a vehicle body in a supporting manner, and includes two large diameter sections 130a, 130b and a smaller diameter section interposed between the large diameter sections. The small diameter section includes a plurality of projections 130e and a plurality of bridge portions 130f. Recesses 130h, 130g are provided around the plurality of projections 130e. Recesses 130i are provided between the bridge portions 130f and the projections 130e. Both sides of the bridge portions 130f are continued to side surfaces of the large diameter sections 130a, 130b. In the small diameter section, combinations of the projections 130e and the recesses 130g-130i constitute rigidity adjustment sections.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an intake pipe support structure for an engine or a vehicle body.

  The intake pipe of an engine is generally supported and fixed to the engine or the vehicle body. At that time, a mount with a rubber bush is used to absorb the displacement of the intake pipe due to vibration of the engine or manufacturing errors of members. Is used (Patent Document 1).

  For example, conventionally, an exhaust turbocharger is attached to increase the output of the engine. The exhaust turbocharger includes a turbine section having a turbine that is driven by the energy of exhaust gas that passes through the exhaust passage, and a compressor that is driven by the turbine and pressurizes the air in the intake passage.

  Here, the intake pipe connected to the compressor of the exhaust turbocharger is generally supported and fixed to the engine. In this case, a flexible tube (rubber bellows) is used to absorb the displacement of the intake pipe due to the thermal expansion of the exhaust system including the exhaust turbocharger and the exhaust manifold upstream thereof, as well as the vibration of the engine and the manufacturing errors of the members. A mount having a tube) is used (Patent Document 2).

JP 2002-13590 A Japanese Patent Laid-Open No. 03-106166

  When the displacement of the intake pipe is large, for example, when an exhaust turbocharger is provided, there may occur a case where the displacement of the intake pipe cannot be absorbed by the support structure according to Patent Document 1 alone.

  Therefore, in a conventional engine with an exhaust turbocharger, a structure that absorbs the displacement of the intake pipe by interposing a rubber flexible tube between the exhaust turbocharger and the intake pipe has been adopted. . At this time, since the flexible tube has low rigidity, the flexible tube is employed not only for a long distance as in the above-mentioned Patent Document 2, but only for part of the connection to the compressor.

  On the other hand, for example, when the blade size of the compressor is increased in order to further improve the turbocharging performance of the exhaust turbocharger, connection from the layout to the compressor of the exhaust turbocharger is made. The flexible tube cannot be interposed in the part. In such a case, the displacement of the intake pipe due to the thermal expansion of the exhaust system cannot be absorbed by the conventional support structure disclosed in Patent Document 1 alone.

  The present invention is intended to solve such a problem, and can absorb a relatively large displacement of the intake pipe even when a flexible tube cannot be interposed. An object of the present invention is to provide an intake pipe support structure for an engine or a vehicle body that can maintain the support and fixation of the pipe.

  An intake pipe support structure for an engine or a vehicle body according to one aspect of the present invention includes an intake pipe and a mount.

  The intake pipe is disposed in an air supply path to the engine and has a mount stay portion.

  The mount has a rubber bush with which the mount stay portion is in contact with an outer peripheral portion, and supports and fixes the intake pipe to the engine or the vehicle body.

  In this aspect, the outer peripheral portion of the rubber bush has a rigidity adjusting portion in which the rigidity is adjusted by at least one of the structure and the material.

  In the intake pipe support structure according to the above aspect, since the rigidity adjusting portion is provided at the outer peripheral portion of the rubber bush, even when a relatively large displacement of the intake pipe is assumed for some reason, the displacement direction is taken into consideration. If the rigidity adjusting portion is provided, a relatively large displacement of the intake pipe can be absorbed by the mount. In other words, the rigidity of the outer peripheral portion of the rubber mount can be adjusted in the circumferential direction by forming the rigidity adjusting portion.

  Therefore, the intake pipe support structure for the engine or the vehicle body according to the above aspect can absorb a relatively large displacement of the intake pipe even when the flexible tube cannot be interposed, and the intake pipe is supported by the engine or the vehicle body. Can be fixed.

  An intake pipe support structure for an engine or a vehicle body according to another aspect of the present invention is configured as described above, wherein the rigidity adjusting portion is configured by a combination of a concave portion and a convex portion adjacent to each other. In other words, in this aspect, the rigidity is adjusted by the structure. Therefore, it is possible to effectively absorb the displacement of the intake pipe while suppressing an increase in the manufacturing cost of the rubber bush.

  An intake pipe support structure for an engine or a vehicle body according to another aspect of the present invention is the above-described structure, wherein the intake air is introduced into the air supply path between the engine and the intake pipe by the energy of the exhaust gas from the engine. An exhaust turbocharger having a compressor that pressurizes and supplies the engine to the engine is disposed.

  In this aspect, the intake pipe has an opening on one end side connected to the compressor.

  In the intake pipe support structure according to the above aspect, the outer peripheral portion of the rubber bush is rigid in consideration of the direction of displacement of the intake pipe due to the thermal expansion of the exhaust system including the exhaust turbocharger and the exhaust manifold upstream thereof. If the adjustment portion is provided, the displacement of the intake pipe can be absorbed by the mount even when the flexible tube cannot be inserted.

  An intake pipe support structure for an engine or a vehicle body according to another aspect of the present invention has the above-described configuration, wherein the exhaust turbocharger includes a turbine rotated by exhaust gas discharged from the engine, and the engine includes an engine A head, and an engine block joined to the engine head.

  In this aspect, when it is assumed that the engine head is located on the upper side in the first direction with respect to the engine block, the shaft core of the turbine in the exhaust turbocharger is connected to the engine in the exhaust manifold. The intake pipe is located at the upper side in the first direction relative to the axial center at the first end, and the intake pipe is a portion that continues to the opening on the one end side. A second bending portion in which the tube axis is bent in a direction different from the first bending portion, a portion following the second bending portion, and a straight extension portion in which the tube axis extends straightly, Have

  In this aspect, the mount stay portion is provided in the straight extension portion, and an exhaust manifold is joined to the engine. When the extension direction of the exhaust manifold at the joint location of the exhaust manifold to the engine is the second direction, in the top view, the straight extension direction of the straight extension portion is a direction along the second direction, The rigidity adjusting portion in the rubber bush is provided in a portion where the mount stay portion abuts in the straight extending direction of the straight extending portion and a peripheral region thereof.

  In the intake pipe support structure according to the above aspect, the convex portion of the rigidity adjusting portion in the rubber bush is provided in a portion where the mount stay portion abuts in the straight direction of the straight extension portion, and a concave portion is provided in a peripheral region thereof. The rigidity of the portion can be adjusted, and the displacement of the intake pipe accompanying the thermal expansion of the exhaust system can be effectively absorbed.

  An intake pipe support structure for an engine or a vehicle body according to another aspect of the present invention, in the above configuration, is inclined in the second direction with respect to a horizontal axis in a side view, and the rigidity adjusting portion in the rubber bush Are provided in a portion where the mount stay portion abuts in each of the first direction and the second direction and a peripheral region thereof.

  In the intake pipe support structure according to the above aspect, the convex portion of the rigidity adjusting portion in the rubber bush is provided in a portion where the mount stay portion abuts in each of the first direction and the second direction, and a concave portion is provided in the surrounding area. Therefore, even if the intake pipe is inclined with the inclination of the engine, the displacement can be effectively absorbed by adjusting the rigidity of the portion.

  An intake pipe support structure for an engine or a vehicle body according to another aspect of the present invention has the above-described configuration, and when viewed from above, the exhaust turbocharger is disposed at a corner portion on one side of the engine. The first curved portion of the tube is curved outward from the engine along the corner portion from the one side.

  In the intake pipe support structure according to the above aspect, the first curved portion of the intake pipe is provided in a place immediately from the connection portion with the exhaust turbocharger, and between the exhaust turbocharger and the intake pipe. It is difficult to interpose a flexible tube in Even in such a situation, in the above aspect, by adopting the rubber bush configuration as described above, the displacement of the intake pipe accompanying the thermal expansion of the exhaust system can be reliably absorbed by the rubber bush.

  An intake pipe support structure for an engine or a vehicle body according to another aspect of the present invention, in the above configuration, the rubber bush has two large-diameter portions that are annular with each other, and an annular shape that is smaller in diameter than the large-diameter portion, And a small-diameter portion disposed between the two large-diameter portions, which are integrally formed and have a bobbin shape as a whole, and the outer peripheral portion with which the mount stay portion abuts is formed by the small-diameter portion. This is the outer periphery.

  In the intake pipe support structure according to the above aspect, since the rigidity adjusting portion is provided at the small diameter portion of the rubber bush, the convex portion of the rigidity adjusting portion is received around the force due to the displacement of the intake pipe accompanying the thermal expansion of the exhaust system. Even when the lens is elastically deformed, it is possible to avoid a situation in which the mount stay portion is detached at the large diameter portions on both sides.

  An intake pipe support structure for an engine or a vehicle body according to another aspect of the present invention is configured as described above, wherein the outer peripheral portion of the small-diameter portion includes a bridge portion in which both side portions are continuous with the side surfaces of the two large-diameter portions, respectively. The rigidity adjusting portion is provided such that at least the top portion of the convex portion is provided via the concave portion with respect to the two large diameter portions.

  In the intake pipe support structure according to the above aspect, in the rubber bush, a continuous bridge portion is provided on each of the side surfaces of the two large-diameter portions, and a convex portion is provided via a concave portion with respect to the two large-diameter portions. Therefore, the rigidity adjustment at the outer peripheral portion can be easily performed. For example, the rigidity with respect to forces from various directions with respect to the outer peripheral portion can be similarly set on the circumference.

  An intake pipe support structure for an engine or a vehicle body according to another aspect of the present invention is the above-described configuration, wherein the outer peripheral portion of the small diameter portion includes a plurality of both side portions continuous to the side surfaces of the two large diameter portions, respectively. Are provided, and a plurality of rigidity adjusting portions are provided. And each rigidity adjustment part is provided with at least the top part of the said convex part via the said recessed part with respect to said two large diameter parts, and each top part of these bridge | bridging part, and said some rigidity The concave portions are provided between the top portions of the convex portions in the adjustment portion so as to be in a state of being spaced apart from each other.

  In the intake pipe support structure according to the above aspect, the top portions of the plurality of bridge portions and the top portions of the plurality of convex portions are in a state of being spaced apart from each other. Since the concave portion is provided, the plurality of bridge portions and the plurality of convex portions are unlikely to interfere with each other, and the rigidity of the rigidity adjusting portion with respect to the bridge portion can be appropriately adjusted. Therefore, even when the displacement of the intake pipe accompanying the thermal expansion of the exhaust system is relatively large, the displacement can be reliably absorbed by the mount.

  An intake pipe support structure for an engine or a vehicle body according to another aspect of the present invention is configured as described above, wherein the rubber bush is provided with a hole passing through the two large diameter portions and the small diameter portion, The hole has an elliptical shape or an oval shape in plan view, and the bridge portion is provided in the long axis direction of the hole at the outer peripheral portion of the small-diameter portion, and the rigidity adjusting portion is The outer peripheral portion of the small diameter portion is provided in the short axis direction of the hole portion.

  If a rubber bush having an elliptical or elliptical outer periphery is assumed, the rigidity of the long side portion (the portion where the mount stay portion abuts in the short axis direction) is high, and the short side portion (the mount stay portion is The rigidity of the portion that abuts in the long axis direction is low. In contrast, in the above aspect, the rigidity of the long side portion and the short side portion can be adjusted (for example, equal) by providing the bridge portion in the long axis direction and providing the rigidity adjusting portion in the end axis direction. it can.

  An intake pipe support structure for an engine or a vehicle body according to another aspect of the present invention is configured as described above, wherein the outer peripheral portion of the small diameter portion is provided with the concave portion between the convex portions of the rigidity adjusting portion. The concave portion is in the central portion in the long axis direction of the outer peripheral portion of the small diameter portion.

  In the intake pipe support structure according to the above aspect, the concave portion is provided between the convex portions, and the concave portion serves as a central portion in the long axis direction, so that the outer peripheral portion of the rubber bush receives the force accompanying the displacement of the intake pipe. In this case, the displacement can be effectively absorbed.

  In the intake pipe support structure for the engine or the vehicle body according to each of the above aspects, a relatively large displacement of the intake pipe can be absorbed even when a flexible tube cannot be interposed, and the intake pipe is supported by the engine or the vehicle body. Fixation can be maintained.

1 is a schematic plan view showing a partial configuration of an engine 1 with an exhaust turbocharger according to an embodiment. 1 is a schematic side view showing a partial configuration of an engine 1 with an exhaust turbocharger. 3 is a schematic side view showing a structure for attaching the intake pipe 12 to a bracket 14. FIG. 2 is a schematic cross-sectional view showing a structure for attaching an intake pipe 12 to a bracket 14. FIG. 3 is a schematic perspective view showing a configuration of a rubber bush 130 in the mount 13. FIG. 3 is a schematic top view showing a configuration of a rubber bush 130. FIG. 3 is a schematic side view showing a configuration of a rubber bush 130. FIG. 6 is a schematic cross-sectional view showing a state in which the mount stay portion 12f of the intake pipe 12 contacts the short side portion 130k of the rubber bush 130. FIG. FIG. 6 is a schematic cross-sectional view showing a contact state of a mount stay portion 12f of the intake pipe 12 to a long side portion 130j in a rubber bush 130. Is a schematic diagram showing an exhaust manifold central axis Ax ₁₀ of the engine 10 in the exhaust turbocharged engine 1.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The form described below is one embodiment of the present invention, and the present invention is not limited to the following form except for the essential configuration.

1. Schematic Configuration of Engine 1 with Exhaust Turbocharger The schematic configuration of the engine 1 with an exhaust turbocharger according to this embodiment will be described with reference to FIGS. 1 and 2.

  As shown in FIGS. 1 and 2, the engine 1 with an exhaust turbocharger includes an engine 10, an exhaust turbocharger 11, an intake pipe 12, a mount 13, and a bracket 14.

  In the present embodiment, the engine 10 is a rear-exhaust multi-cylinder horizontal diesel engine.

  The exhaust turbocharger 11 includes a compressor 11a and a turbine unit 11b. The exhaust turbocharger 11 is supplied with exhaust gas to the turbine portion 11b, and the turbine housed therein is driven by the energy of the exhaust gas.

  The compressor 11 a of the exhaust turbocharger 11 has blades (compressor impellers) that are driven as the turbine is driven, pressurizes air supplied through the intake pipe 12, and supplies the compressed air to the combustion chamber of the engine 10. To do. As shown in FIG. 1, the exhaust turbocharger 11 according to the present embodiment is disposed at a corner portion on one side of the engine 10 when the engine 10 is viewed from above.

Here, in FIG. 1, illustration of the exhaust manifold is omitted, but the exhaust manifold extends in the direction of the arrow A ₁ at the connection location with the engine 10. Thus, exhaust manifold, during driving of the engine 10, thermally expands toward the direction of arrow A _1.

  One end side opening of the intake pipe 12 according to the present embodiment is connected to the compressor 11 a of the exhaust turbocharger 11. As shown in FIGS. 1 and 2, the intake pipe 12 is curved along the outside of the corner portion of the engine 10 at a portion immediately from the connection location with the exhaust turbocharger 11.

  The configuration of the intake pipe 12 will be described later.

  As shown in FIG. 2, the mount 13 is interposed between a mount stay portion provided in a part of the intake pipe 12 and a bracket 14 fixed to the engine 10, and the intake pipe 12 is supported and fixed to the engine 10. To do.

Incidentally, as shown in FIG. 2, the engine 10 is arranged in a state in which the bore axis Ax ₁ is inclined by an angle θ with respect to the Z direction (vertical direction) reference line Ax ₀ parallel to. In addition, the intake pipe 12 is disposed on the upper side in the Z direction in the portion attached to the bracket 14.

Here, at the time of driving of the engine 10, when the exhaust manifold is thermally expanded toward the direction of arrow A _1, the thermal expansion, both components in the X and Z directions (longitudinal direction of the vehicle) (vertical direction) It can be divided into A _1X and A _1Z .

2. Configuration of Intake Pipe 12 The configuration of the intake pipe 12 will be described with reference to FIGS. 1, 2, and 3.

  As shown in FIG. 3, in the intake pipe 12, the first bending portion 12c, the second bending portion 12d, and the straight extension portion 12d are continuous from the one end side opening 12a toward the other end side opening 12b. Is provided. In the first bending portion 12c, the tube axis is bent by approximately 90 ° from the X direction (front-rear direction of the vehicle) to the Z direction (vertical direction) immediately from the one end side opening 12a. Further, in relation to the engine 10, the first bending portion 12 c of the intake pipe 12 is bent along the engine 10 at the outer side of the corner portion of the engine 10 in a top view, as shown in FIG. 1. Yes.

As shown in FIG. 3, the second bending portion 12d is continuous with the first bending portion 12c, and the tube axis is bent toward the X direction. The straight extension portion _12e extends straight in a state in which the straight extension portion tube axis Ax _12e is inclined so as to descend downward in the Z direction from the right side to the left side in the X direction.

  The mount stay portion 12f is a tongue-like plate portion that protrudes downward in the Z direction from the outer peripheral surface of the straight extension portion 12e. Although not shown in detail, the mount stay portion 12f is provided with a hole for attachment.

  As shown in FIGS. 2 and 3, the intake pipe 12 is supported and fixed to the bracket 14 via the mount 13 on the lower side in the Z direction than the straight extension portion 12 e.

  The intake pipe 12 according to the present embodiment is made of a resin material (for example, a nylon-based resin material with a reinforcing material).

3. Attachment Structure of Intake Pipe 12 to Bracket 14 The attachment structure of the intake pipe 12 to the bracket 14 will be described with reference to FIG. FIG. 4 is a schematic cross-sectional view showing a cross-sectional configuration at a location where the intake pipe 12 is attached to the bracket 14.

  As shown in FIG. 4, in the intake pipe 12, the mount stay portion 12f is integrally formed with a pipe portion made of a resin material by insert molding. A bracket 14 is fixed to the lower portion of the mount stay portion 12f in the Z direction via a mount 13.

  The mount 13 includes a rubber bush 130, a spacer 131, a bolt 132, and a nut 133. The rubber bush 130 is an annular rubber member (for example, EPDM: ethylene / propylene / diene rubber), and is fitted in the hole of the mount stay portion 12f. The configuration of the rubber bush 130 will be described later.

  The spacer 131 is an annular metal member and is attached to the hole of the rubber bush 130. The dimension of the spacer 131 in the Y direction (the left-right direction of the vehicle) is set to be approximately the same as or slightly shorter than the Y-direction dimension of the rubber bush 130.

  The bolt 132 has a head fixed to the bracket 14 by welding, and a shaft portion passing through the hole of the spacer 131. The nut 133 is a nut in which a washer portion is integrated. When the nut 133 is screwed to the bolt 132, the mount stay portion 12f is supported and fixed in the Y direction through the rubber bush 130.

4). Configuration of Rubber Bush 130 The configuration of the rubber bush 130 in the mount 13 will be described with reference to FIGS. FIG. 5 is a schematic perspective view showing the rubber bush 130, FIG. 6 is a schematic top view as viewed from above in the Z direction, and FIG. 7 is a schematic side view as viewed from the side in the Y direction.

  As shown in FIG. 5, the rubber bush 130 is formed by integrally forming two large-diameter portions 130a and 130b that are annular with each other and a small-diameter portion that is an annular portion having a smaller diameter than the large-diameter portions 130a and 130b. The bobbin shape as a whole. As shown in FIG. 4, the top surfaces of the plurality of convex portions 130 e and the plurality of bridge portions 130 f in the small diameter portion are fitted into the hole portions of the mount stay portion 12 f. The side surface of the mount stay portion 12f is in contact with or close to the inner surface of the large diameter portions 130a and 130b.

As shown in FIG. 7, the rubber bush 130 has an oval shape having a _long- axis bushing center axis Ax _{130x in} the X direction and a short-diameter bushing center axis Ax _130z in the Z direction in a side view. The hole 130d provided in the central portion is also in an oval shape.

  As shown in FIGS. 5 and 7, four convex portions 130 e and two bridge portions 130 f are provided on the outer peripheral portion of the small diameter portion of the rubber bush 130. The four convex portions 130e protrude in the shape of islands with their top portions spaced apart from the large-diameter portions 130a and 130b (a state in which the concave portions 130h are interposed). Further, the four convex portions 130e are provided in a state where the top portions thereof are also spaced from each other.

  As shown in FIG. 7, when assuming a small-diameter base surface 130c that envelops the top surfaces of the four convex portions 130e and the two bridge portions 130f, a concave portion 130g is provided between the convex portions 130e. A concave portion 130i is provided between the convex portion 130e and the bridge portion 130f.

The recess 130g is provided on the bush center axis Ax _130Z .

  Moreover, as shown in FIG. 5, the recessed part 130h is provided in the Y direction both sides part of the four convex parts 130e.

  In the present embodiment, the rigidity adjusting portion is formed by combining the convex portion 130e and the concave portions 130g to 130i provided adjacent to the convex portion 130e. That is, the rigidity of the portion provided with the bridge portion 130f is adjusted by the combination of the convex portion 130e and the concave portions 130g to 130i.

  On the other hand, as shown in FIGS. 5 and 6, in each of the two bridge portions 130f, both ends in the Y direction are respectively continuous with the inner surfaces of the two large diameter portions 130a and 130b.

As shown in FIG. 7, the two bridge portions 130f are provided so as to protrude outward from the bush center axis Ax _130x , which is a long axis. Of the four convex portions 130e, two of them are arranged on the upper side in the Z direction, and the other two are arranged on the lower side in the Z direction. In this embodiment, the rigidity of the long diameter X direction and the short diameter Z direction rigidity of the rubber bush 130 are made equal by the above configuration. As shown in FIG. 7, in the rubber bush 130, the upper and lower portions in the Z direction (portions where the concave portions 130g and the convex portions 130e are provided) are long side portions 130j, and the portions on both sides in the X direction (the bridge portions 130f are The provided portion) is defined as a short side portion 130k.

  As shown in FIG. 6, the width in the Y direction (the left-right direction of the vehicle) of the top portion of the convex portion 130e is approximately 1/3 of the gap between the large diameter portion 130a and the large diameter portion 130b. .

5. Contact State of Mount Stay Part 12f to Rubber Bush 130 The contact state of the mount stay part 12f to the rubber bush 130 will be described with reference to FIGS. FIG. 8 is a schematic cross-sectional view showing a contact state of the mount stay portion 12f with the short side portion 130k of the rubber bush 130, and FIG. 9 shows a mount stay portion 12f with respect to the long side portion 130j of the rubber bush 130. It is a schematic cross section which shows the contact state.

  8 shows a VIII-VIII cross section of FIG. 5, and FIG. 9 shows a IX-IX cross section of FIG.

  As shown in FIG. 8, with respect to the short side portion 130k of the rubber bush 130, the width direction of the inner peripheral surface of the hole portion of the mount stay portion 12f at the top portion of the bridge portion 130f (see FIGS. 5 to 7). The whole comes into contact. In the short side portion 130k, the bridge portion 130f has both ends in the Y direction continuous to the inner surfaces of the two large diameter portions 130a and 130b as described above. Even if the intake pipe 12 is displaced along with the expansion and a force indicated by an arrow is applied, it is difficult to be deformed. That is, in the oval rubber bush, the short side portion is relatively easily deformed, but the rigidity of the short side portion 130k is adjusted to be equal to the long side portion 130j by forming the bridge portion 130f. Yes.

  On the other hand, as shown in FIG. 9, with respect to the long side portion 130j of the rubber bush 130, only a part of the inner peripheral surface of the hole portion of the mount stay portion 12f abuts on the top portion of the convex portion 130e, and the peripheral concave portion It does not contact 130i. That is, the convex portion 130e is provided with the concave portion 130ih between the large diameter portions 130a and 130b, and the contact with the mount stay portion 12f is restricted.

  And since the top part of the convex part 130e is in the state spaced apart from the inner side surface of the two large diameter parts 130a and 130b as described above, along with the thermal expansion of the exhaust turbocharger 11 When the intake pipe 12 is displaced and a force indicated by an arrow is applied, the displacement can be absorbed in the Y direction and the Z direction rather than the portion where the bridge portion 130f is provided. That is, in the oval rubber bush, the long side portion is relatively difficult to deform, but by providing the concave portions 130g to 130i around the convex portion 130e, the rigidity of the long side portion 130j is reduced to the short side portion. It is adjusted to be approximately equal to 130k.

6). Arrangement of Exhaust Turbocharger 11 The arrangement of the exhaust turbocharger 11 in the engine 1 with the exhaust turbocharger will be described with reference to FIG. FIG. 10 is a schematic view of the engine 1 with an exhaust turbocharger as viewed from the opposite side of the drawing with respect to FIG.

In Figure 10, schematically shows the exhaust manifold center line Ax ₁₀ by a one-dot chain line in the engine 10. In the exhaust turbo supercharger equipped engine 1 according to this embodiment, the axial center of the turbine of the exhaust turbocharger 11 (housed in the turbine portion 11b of FIG. 1.), From exhaust manifold center line (axial) Ax ₁₀ Is also arranged above the Z direction.

Further, as shown in FIGS. 2 and 3, the straight extension portion 12 e in the intake pipe 12 is disposed above the axis of the turbine of the exhaust turbocharger 11 in the Z direction. Therefore, in the intake pipe 12, the straight extension portion 12 e formed by projecting the mount stay portion 12 f is also disposed above the exhaust manifold center line (axial core) Ax _{10 in} the Z direction.

As shown in FIG. 10, the exhaust manifold center line Ax ₁₀ is inclined so as to descend in the Z direction from the right side to the left side in the X direction. That is, the bore axis of the engine 10 (the reciprocating direction of the piston) is also inclined with respect to the Z direction.

7). Effect In the intake pipe support structure according to the present embodiment, since the recesses 130g to 130i are provided in the adjacent portions in the small diameter part of the rubber bush 130, even when a relatively large displacement of the intake pipe is assumed for some reason, A relatively large displacement of the intake pipe 12 can be absorbed by the mount 13 if the rigidity adjusting portion is matched with the displacement direction. In other words, the rigidity at the outer peripheral portion of the rubber mount 130 can be adjusted in the circumferential direction by forming a rigidity adjusting portion configured by combining the concave portions 130g to 130i and the convex portion 130e.

  Therefore, in the intake pipe support structure according to the present embodiment, a relatively large displacement of the intake pipe 12 can be absorbed even when a flexible tube cannot be interposed, and the support and fixing of the intake pipe 12 to the engine 10 is maintained. it can.

  Moreover, in this embodiment, since the rigidity adjustment part comprised by the combination of the recessed part 130g-130i and the convex part 130e is provided in the outer peripheral part in the rubber bush 130, the exhaust turbo supercharger 11 and its upstream Considering the direction of displacement of the intake pipe 12 due to the thermal expansion of the exhaust system composed of the exhaust manifold, if the rigidity adjusting portion is provided, the displacement of the intake pipe 12 can be absorbed by the mount 13. it can.

  In the above embodiment, the recess 130 i in the rubber bush 130 is provided around the portion (bridge portion 130 f) where the mount stay portion 12 f abuts in the straight advance direction (X direction) of the straight extension portion 12 e. The rigidity can be adjusted, and the displacement of the intake pipe 12 accompanying the thermal expansion of the exhaust system can be effectively absorbed.

  Further, in the present embodiment, the recesses 130g to 130i of the rigidity adjusting portion in the rubber bush 130 are provided at portions where the mount stay portion 12f abuts in each of the Y direction and the Z direction. Accordingly, even if the straight extension portion 12e of the intake pipe 12 is also inclined, the displacement can be effectively absorbed by adjusting the rigidity of the portion.

  Further, in the present embodiment, the first curved portion 12 c of the intake pipe 12 is provided in a place immediately from the connection portion with the exhaust turbocharger 11, and the exhaust turbocharger 11 and the intake pipe 12 are connected to each other. Even in a situation where it is difficult to interpose a flexible tube between them, by adopting the above-described configuration of the rubber bush 130, the rubber bush 130 can reliably absorb the displacement of the intake pipe 12 due to the thermal expansion of the exhaust system. Can do.

  In the present embodiment, since the rigidity adjusting portion (the concave portions 130g to 130i and the convex portion 130e) is provided in the small diameter portion of the rubber bush 130, the force due to the displacement of the intake pipe 12 due to the thermal expansion of the exhaust system is received. , The convex portions 130e having concave portions 130g to 130i formed around them, and the large-diameter portions 130a. It is possible to avoid a situation in which the mount stay portion 12f is detached at 130b.

  Further, in the support structure of the intake pipe 12 according to the present embodiment, in the rubber bush 130, the bridge portion 130f continuous to the side surfaces of the two large diameter portions 130a and 130b and the two large diameter portions 130a and 130b, respectively. Since the plurality of convex portions 130e are provided via the concave portion 130h, the rigidity of the outer peripheral portion can be easily adjusted.

  Further, in the support structure for the intake pipe 12 according to the present embodiment, the top portions of the bridge portion 130f and the top portions of the convex portion 130e are spaced apart from each other. Since the concave portion 130i is provided between the large diameter portions 130a and 130b, the bridge portion 130f and the convex portion 130e are unlikely to interfere with each other, and the rigidity between the bridge portion and the 130f convex portion 130e can be adjusted appropriately. it can. Therefore, even when the displacement of the intake pipe 12 accompanying the thermal expansion of the exhaust system is relatively large, the mount 13 can reliably absorb the displacement.

[Modification]
In the above embodiment, the configuration in which the mount stay portion 12f protrudes from the straight extension portion 12e in the intake pipe 12 is employed, but the present invention is not limited to this. For example, a configuration in which a mount stay portion protrudes from the second bending portion 12d can be employed.

  Further, in the intake pipe 12 according to the above-described embodiment, the mount stay part 12f is protruded downward in the Z direction with respect to the straight extension part 12e of the intake pipe 12, but the present invention is limited thereto. is not. For example, the mount stay portion may protrude from the intake pipe 12 in the Z direction.

  Note that this case can be dealt with by appropriately changing the shape of the bracket and the fixing position of the bracket with respect to the engine 10.

  Further, in FIG. 3 and the like, the resonator is provided in the intake pipe 12, but in the present invention, the resonator is not an essential component.

  Moreover, in the said embodiment, although the rubber bush 130 was formed using EPDM (ethylene propylene diene rubber) as an example, this invention is not limited to this. For example, it can be formed by using IIR (butyl rubber) or the like, or different rubber materials can be used for the low-rigidity portion and the high-rigidity portion.

  Moreover, in the said embodiment, although the shape of the hole 130d in the rubber bush 130 was made into the ellipse shape, this invention is not limited to this. For example, an elliptical shape, a perfect circular shape, or a polygonal shape may be used.

  Moreover, in the engine 1 with the exhaust turbocharger according to the above embodiment, a diesel engine is employed as the engine 10, but the present invention is not limited to this. For example, a gasoline engine can be employed. Further, the mounting direction of the engine can be set not only horizontally but also vertically.

  In addition, the intake pipe 12 of the engine 1 with an exhaust turbocharger according to the above-described embodiment is configured by the three parts of the first curved part 12c, the second curved part 12d, and the straight extension part 12e. The present invention can be appropriately changed according to the shape of the engine 10, the arrangement of surrounding components, and the like.

  In the engine 1 with an exhaust turbocharger according to the above embodiment, the intake pipe 12 is made of a resin material. However, the present invention is not limited to this. For example, the intake pipe 12 may be configured using a metal material.

  Further, in the above embodiment, the two bridge portions 130f and the four convex portions 130e are provided in the small diameter portion of the rubber bush 130, but the present invention is not limited to this. In other words, the rigidity in the abutting direction of the mount stay portion may be appropriately adjusted in consideration of the direction of thermal expansion of the exhaust system including the exhaust turbocharger 11 by the intake pipe 12. The number of parts formed can be changed as appropriate.

  Moreover, in the said embodiment, although it was set as the structure which the top parts of each convex part 130e are not connected, if it is a range which does not interfere mutually substantially on a rigid surface, the structure which is connected can also be employ | adopted.

  Moreover, in the said embodiment, although the rubber bush 130 was provided with the two bridge parts 130f and the four convex parts 130e, this invention is not limited to this. For example, it can also be set as the structure provided with one bridge | bridging part and one convex part.

  Moreover, in the said embodiment, although the intake pipe 12 and the bracket 14 were fixed in one place, this invention is not limited to this. For example, it is possible to adopt a configuration in which the support is fixed at two or more locations.

  The intake pipe 12 according to the above embodiment employs a configuration in which the first bending portion 12c is bent by approximately 90 °, but the present invention is not limited to this. About the degree of curvature, it can also be set as 30 degrees, 60 degrees, 120 degrees, 150 degrees, 180 degrees, etc., for example. That is, it can be changed as appropriate based on the positional relationship with various functional components arranged around the engine 10.

  In the above-described embodiment, the rigidity adjusting portion including the concave portions 130g to 130i and the convex portion 130e is provided in the small diameter portion of the rubber bush 130, but the present invention is not limited thereto. For example, changing the material to be used in the circumferential direction to make the rigidity adjustment part, changing the structure and material both to make the rigidity adjustment part, and different sizes from each other like the tread pattern of a tire By providing a plurality of blocks on the outer peripheral portion of the small diameter portion, the rigidity adjusting portion can be provided.

  Moreover, in the said embodiment, although the rigidity of the X direction in the rubber bush 130 was made equal to the rigidity in a Z direction, this invention is not limited to this. For example, when the displacement of the intake pipe in the X direction is large, the rigidity in the X direction can be made lower than the rigidity in the Z direction.

  Moreover, in the said embodiment, although the engine 1 with the exhaust turbo supercharger provided with the exhaust turbo supercharger 11 was made into an example, this invention is not limited to this. For example, the above-described configuration can also be adopted in an intake pipe support structure for an engine that does not include an exhaust turbocharger. Even in this case, the same effect as described above can be obtained.

  Moreover, in the said embodiment, although the structure which supports the intake pipe 12 in the engine 10 was employ | adopted as an example, this invention is not limited to this. For example, the intake pipe may be supported on the vehicle body.

DESCRIPTION OF SYMBOLS 1 Engine with exhaust turbocharger 10 Engine 11 Exhaust turbocharger 11a Compressor 11b Turbine part 12 Intake pipe 12f Mount stay part 13 Mount 14 Bracket 130 Rubber bush 130c Small diameter base surface 130e Convex part 130f Bridge part 130g-130i Concave part 130j Long side side 130k Short side side

Claims (11)

In the intake pipe support structure to the engine or vehicle body,
An intake pipe disposed in the air supply path to the engine and having a mount stay;
A mount that has a rubber bush against which the mount stay portion comes into contact with an outer periphery, and that supports and fixes the intake pipe to the engine or the vehicle body;
With
The outer peripheral portion of the rubber bush has a rigidity adjusting portion in which the rigidity is adjusted by at least one of a structure and a material.
Intake pipe support structure for engine or car body. An intake pipe support structure for an engine or a vehicle body according to claim 1,
The rigidity adjusting portion is configured with a combination of a concave portion and a convex portion adjacent to each other,
Intake pipe support structure for engine or car body. An intake pipe support structure for an engine or a vehicle body according to claim 2,
In the air supply path between the engine and the intake pipe, an exhaust turbocharger having a compressor that pressurizes intake air by the energy of exhaust gas from the engine and supplies the compressed air to the engine is disposed. ,
The intake pipe has one end side opening connected to the compressor,
Intake pipe support structure for engine or car body. An intake pipe support structure for an engine or a vehicle body according to claim 3,
The exhaust turbocharger includes a turbine that is rotated by exhaust gas discharged from the engine,
The engine has an engine head and an engine block joined to the engine head,
When it is assumed that the engine head is located on the upper side in the first direction with respect to the engine block, the axis of the turbine in the exhaust turbocharger is the axis at the joint of the exhaust manifold with the engine. Located above the first direction,
The intake pipe is a portion following the opening on the one end side, and is a first bending portion formed by bending the tube axis, and a portion following the first bending portion, and having a direction different from that of the first bending portion. A second bending portion formed by bending the tube axis, and a straight extension portion that is a portion following the second bending portion and in which the tube shaft extends straight,
The mount stay part is provided in the straight extension part,
An exhaust manifold is joined to the engine,
When the extension direction of the exhaust manifold at the joint location of the exhaust manifold to the engine is the second direction,
In a top view, the straight extension direction of the straight extension portion is a direction along the second direction,
The rigidity adjusting portion in the rubber bush is provided at a portion where the mount stay portion abuts in the straight extension direction of the straight extension portion.
Intake pipe support structure for engine or car body. An intake pipe support structure for an engine or a vehicle body according to claim 4,
In the side view, the second direction is inclined with respect to the horizontal axis,
The rigidity adjusting portion in the rubber bush is provided at a portion where the mount stay portion abuts in each of the first direction and the second direction.
Intake pipe support structure for engine or car body. An intake pipe support structure for an engine or a vehicle body according to claim 4 or 5,
In the top view, the exhaust turbocharger is disposed at a corner portion on one side of the engine,
The first curved portion of the intake pipe is curved outward from the engine along the corner portion from the one side.
Intake pipe support structure for engine or car body. An intake pipe support structure for an engine or a vehicle body according to any one of claims 2 to 6,
The rubber bush is formed by integrally forming two large-diameter portions that are annular with each other and a small-diameter portion that is smaller in diameter than the large-diameter portion and disposed between the two large-diameter portions. The bobbin shape as a whole
The outer peripheral portion with which the mount stay portion abuts is an outer peripheral portion of the small diameter portion.
Intake pipe support structure for engine or car body. An intake pipe support structure for an engine or a vehicle body according to claim 7,
The outer peripheral portion of the small diameter portion is provided with a bridge portion in which both side portions are continuous with the side surfaces of the two large diameter portions, respectively.
The rigidity adjusting portion is configured such that at least the top portion of the convex portion is provided via the concave portion with respect to the two large diameter portions.
Intake pipe support structure for engine or car body. An intake pipe support structure for an engine or a vehicle body according to claim 7,
The outer peripheral portion of the small diameter portion is provided with a plurality of bridge portions in which both side portions are respectively connected to the side surfaces of the two large diameter portions,
A plurality of the rigidity adjusting portions are provided on the outer peripheral portion of the small diameter portion,
Each of the plurality of rigidity adjusting portions is configured such that at least the top portion of the convex portion is provided via the concave portion with respect to the two large diameter portions,
The concave portions are provided between the top portions of the plurality of bridge portions and the top portions of the convex portions of the plurality of rigidity adjusting portions so as to be spaced apart from each other. Become,
Intake pipe support structure for engine or car body. An intake pipe support structure for an engine or a vehicle body according to claim 8 or 9,
The rubber bush has a hole that penetrates the two large diameter portions and the small diameter portion,
The hole is elliptical or oval in plan view,
The bridge portion is provided in the long axis direction of the hole in the outer peripheral portion of the small diameter portion,
The rigidity adjusting portion is provided in the short axis direction of the hole portion in the outer peripheral portion of the small diameter portion.
Intake pipe support structure for engine or car body. An intake pipe support structure for an engine or a vehicle body according to claim 10,
In the outer peripheral portion of the small diameter portion, the concave portion is provided between the convex portions of the rigidity adjusting portion, and the concave portion is in a central portion in the major axis direction of the outer peripheral portion of the small diameter portion.
Intake pipe support structure for engine or car body.

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