JP2015117590A - Exhaust system component attachment structure of engine, and exhaust system component attachment method of engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhaust system component attachment structure which can attach an exhaust system component to an engine by suppressing an increase of the number of part items, and suppressing the displacement of an attachment position, and an exhaust system component attachment method of the engine.SOLUTION: In an exhaust system component attachment structure of an engine which fastens a downstream-side exhaust system component 50 fastened with a second bracket 630 and a third bracket 730 to a diesel engine 10, the second bracket 630 and the third bracket 730 can be fastened to the downstream-side exhaust system component 50 which is attached to a reference face 111 in a state that the second bracket 630 and the third bracket 730 are arranged so that relative angles of a first abutment face 631, a second abutment face 632 and a third bracket-side abutment face 731a become prescribed angles with respect to the reference face 111. U-shaped piping 520 which permits the circulation of an exhaust gas, and has flexibility in a vehicle fore-and-aft direction is arranged in the downstream-side exhaust system component 50.

Description

  The present invention is, for example, an exhaust system component mounting structure of an engine that is connected to an exhaust port of an engine and permits the flow of exhaust gas discharged from the engine and leads the exhaust gas to the outside. The present invention relates to a method for attaching system parts.

  As internal combustion engines of ordinary automobiles, there are a gasoline engine that uses gasoline as fuel and a diesel engine that uses light oil as fuel. Of these, diesel engines are mainly equipped with exhaust superchargers in exhaust system parts in order to increase output torque at low and medium speeds.

  Furthermore, in recent years, in consideration of the environment, the exhaust system parts of a diesel engine are provided with an oxidation catalyst and a diesel particulate filter (hereinafter referred to as DPF) that reduces particulate matter contained in the exhaust gas. (See Patent Document 1).

  Such an exhaust system component includes, for example, an exhaust supercharger and an oxidation catalyst, and is configured by connecting an upstream exhaust system component connected to a diesel engine and a downstream exhaust system component having a DPF. At the same time, it is connected and supported to the diesel engine via a predetermined bracket.

  By the way, when the bracket is fastened to the diesel engine, there may be a deviation in the mounting position between the diesel engine and the bracket due to component parts constituting the exhaust system parts and manufacturing variations or assembly variations of the brackets. If the bracket is forcibly fastened to the diesel engine in such a state, unintended excessive stress may be applied to the exhaust system parts and the bracket.

  Therefore, for example, an intermediate bracket having a structure capable of adjusting the displacement of the mounting position is interposed between the exhaust system component and the predetermined bracket, or between the diesel engine and the predetermined bracket, so that the exhaust system component or It is possible to prevent an unintended excessive stress from being applied to the predetermined bracket.

  However, interposing the intermediate bracket increases the number of parts and complicates the structure for mounting the exhaust system parts. Therefore, there is a problem that it is not easy to mount the engine and the exhaust system parts.

JP 2007-85292 A

  In view of the above-described problems, the present invention suppresses an increase in the number of components and suppresses a displacement of an attachment position, and an exhaust system component mounting structure for an engine capable of mounting an exhaust system component to the engine, and an engine exhaust system An object is to provide a method for mounting components.

  The present invention allows an exhaust gas exhausted from an engine to flow, exhaust system parts fastened to an exhaust system mounting portion provided on the engine side, a support member mounting portion provided on the engine side, and the exhaust An exhaust system part for an engine comprising: at least one support member fastened to a fastened portion provided in the system part and supporting the exhaust system part, wherein the exhaust system part fastened to the support member is fastened to the engine A mounting structure and an exhaust system component mounting method for an engine, wherein a surface of the exhaust system component facing the exhaust system mounting portion is an exhaust facing surface, and a surface of the support member that is in contact with the support member mounting portion As the support contact surface, the surface of the support member mounting portion that contacts the support contact surface is formed so that the relative angle with respect to the surface of the exhaust system mounting portion facing the exhaust facing surface is a predetermined angle. And With respect to the exhaust system component in which the exhaust facing surface is in contact with a predetermined reference surface, the support member is disposed such that the relative angle of the support contact surface with respect to the predetermined reference surface is the predetermined angle. In this state, it is configured to be able to be fastened to the fastened part, and allows the exhaust system parts to flow the exhaust gas and has flexibility in a vertical direction substantially perpendicular to the support contact surface. A flexible tubular portion is provided.

The exhaust system mounting portion may be an exhaust port part of an engine including an exhaust port of an engine or an exhaust manifold or a catalytic converter connected to the exhaust port.
The exhaust system component is an exhaust system component including an exhaust manifold or a catalytic converter connected to an exhaust port, or a downstream exhaust system in an exhaust system component composed of an upstream exhaust system component and a downstream exhaust system component. It can be a part or the like.

The predetermined reference surface is a surface corresponding to the exhaust system mounting portion facing the exhaust facing surface, and may be a surface formed on a jig or the like used when fastening the support member to the exhaust system component.
The flexible tubular portion may have a curved shape curved in a predetermined direction or a bellows shape having a bellows portion.

According to the present invention, it is possible to attach the exhaust system component to the engine while suppressing the increase in the number of components and suppressing the displacement of the attachment position.
Specifically, since the support member can be fastened to the exhaust system component in a state where the relative angle of the support contact surface with respect to the predetermined reference surface is a predetermined angle, the exhaust system component mounting structure of the engine, and The exhaust system component mounting method of the engine can make the support contact surface of the support member and the surface of the support member mounting portion facing the support contact surface substantially parallel to each other.

  For this reason, the displacement of the mounting position between the support member mounting portion and the support member occurs in a vertical direction substantially perpendicular to the support contact surface and in a direction substantially perpendicular to the vertical direction. In this case, for example, by making the opening hole of the support member through which the bolt for fastening the support member mounting portion on the engine side and the support member is inserted into a large diameter or an elliptical shape, the exhaust system component mounting structure of the engine, and The exhaust system component mounting method of the engine can easily eliminate the displacement of the mounting position of the support member mounting portion and the support member in a direction substantially perpendicular to the vertical direction.

That is, the displacement of the mounting position between the support member mounting portion and the support member slightly occurs in the vertical direction.
Thus, by providing the flexible tubular part having flexibility in the exhaust system part, the exhaust system part mounting structure of the engine and the exhaust system part mounting method of the engine are supported by the bending of the flexible tubular part. The member mounting portion and the support contact surface can be appropriately brought into contact with each other.

  More specifically, for example, when the position is shifted so that the support member mounting portion and the support member are separated from each other, the flexible tubular portion bends in the vertical direction as the support member mounting portion and the support member are fastened. Thus, the exhaust system component mounting structure of the engine and the exhaust system component mounting method of the engine can easily bring the support member mounting portion and the support member into contact with each other without a gap.

  Alternatively, when the support member mounting portion and the support member are displaced so as to come into strong pressure contact, the flexible tubular portion is bent in the vertical direction, so that the engine exhaust system component mounting structure and the engine exhaust system component mounting method are provided. Can abut the support member mounting portion and the support member with an appropriate pressure.

  Thereby, the exhaust system component mounting structure of the engine and the exhaust system component mounting method of the engine shift the mounting position between the support member mounting portion and the support member without releasing the fastening between the fastened portion and the support member. It can be easily solved.

  Furthermore, due to the flexibility of the flexible tubular part, the exhaust system part mounting structure of the engine and the exhaust system part mounting method of the engine, for example, close the gap by forcibly fastening the support member mounting part and the support member. Compared with the case where it does, it can prevent that the stress which is not intended to a support member, a to-be-fastened part, etc. is added.

  In addition, the exhaust system parts mounting structure of the engine and the exhaust system parts mounting method of the engine include an intermediate bracket that adjusts the mounting position of the exhaust system parts and the support member, or adjusts the mounting position of the engine and the support member. Can be made unnecessary.

For this reason, the exhaust system component mounting structure of the engine and the exhaust system component mounting method of the engine can prevent the mounting structure of the engine, the exhaust system component, and the support member from becoming complicated.
Therefore, the exhaust system component mounting structure of the engine and the exhaust system component mounting method of the engine can easily mount the exhaust system component to the engine while suppressing the increase in the number of components and the displacement of the mounting position.

  As an aspect of the present invention, the fastened portion includes at least a first fastened member to which the support member is fastened and at least a second fastened member to be fixed to a main body portion of the exhaust system component, The first fastened member and the second fastened member can be configured integrally.

According to the present invention, the exhaust system component mounting structure for an engine can accurately mount the exhaust system component to the engine.
Specifically, for example, when the body part of the exhaust system part and the fastened member are configured separately, the exhaust system part mounting structure of the engine has a support member and a support member mounted due to manufacturing variations of the fastened member. There is a risk that the displacement of the mounting position with the part will increase.

  For this reason, in the exhaust system component mounting structure of the engine, it is difficult to eliminate the displacement of the mounting position only by the shape of the opening hole provided in the support member and the flexibility of the flexible tubular portion. That is, the exhaust system component mounting structure of the engine cannot accurately mount the exhaust system component to the engine.

  Therefore, by configuring the fastened member with the first fastened member and the second fastened member, the exhaust system component mounting structure of the engine adjusts the relative position between the first fastened member and the second fastened member. And can be fixed to the main body.

  As a result, the exhaust system component mounting structure of the engine can easily suppress the displacement of the fastened member with respect to the predetermined reference plane. For this reason, the exhaust system component mounting structure of the engine can further suppress displacement of the mounting position between the support member and the support member mounting portion.

  Therefore, the exhaust system component mounting structure of the engine can attach the exhaust system component to the engine with high accuracy by the fastened portion constituted by the first fastened member and the second fastened member.

  As an aspect of the present invention, the exhaust system mounting portion is configured by an upstream exhaust system component that is fastened to an exhaust port of the engine and has an upstream flange at a downstream end, and the exhaust system component Is constituted by a downstream exhaust system component connected to the upstream exhaust system component via a downstream flange facing the upstream flange, and the upstream exhaust system component includes an exhaust supercharger and a catalytic converter. Can be provided in this order from the exhaust port side, and the flexible tubular portion and the diesel particulate filter can be provided in this order from the downstream flange to the downstream exhaust system component.

  According to this invention, the exhaust system component mounting structure of the engine can easily mount the downstream exhaust system component, which is a heavy load, to the engine while suppressing an increase in the number of components and suppressing a shift in the mounting position.

  Further, as an aspect of the present invention, the upstream flange and the downstream flange are arranged in a flow direction of the exhaust gas flowing through the catalytic converter of the upstream exhaust system component, and substantially orthogonal to the flow direction. In this direction, the catalytic converter and the diesel particulate filter are arranged side by side, and the flexible tubular portion can be formed in a curved shape so as to reverse the flow direction of the exhaust gas. .

According to the present invention, the exhaust system component mounting structure of the engine can eliminate the displacement of the mounting position between the engine and the exhaust system component in the vertical direction with a simple structure.
Specifically, since it is curved so as to reverse the flow direction of the exhaust gas, the flexible tubular portion has a shape having a curved portion that is greatly curved. For this reason, the curved part in a flexible tubular part turns into a site | part with low bending rigidity in exhaust system components.

Thereby, the exhaust system component mounting structure of the engine can easily bend the flexible tubular portion in the vertical direction. That is, the exhaust system component mounting structure of the engine can easily eliminate the displacement of the mounting position with a simple configuration as compared with the case where the flexible tubular portion is formed in a bellows shape, for example.
Therefore, the exhaust system component mounting structure of the engine can suppress the increase in the number of components and can easily mount the exhaust system component to the engine by the flexible tubular portion having the curved portion.

  According to the present invention, it is possible to provide an engine exhaust system part mounting structure and an engine exhaust system part mounting method capable of mounting an exhaust system part to an engine while suppressing an increase in the number of parts and suppressing a displacement of the mounting position. it can.

The rear view which shows the external appearance in the rear view of the exhaust system components in a diesel engine. The right view which shows the external appearance by the right side view of the exhaust system components in a diesel engine. The rear view which shows the state which removed the downstream exhaust system component. The external appearance perspective view which shows the external appearance in a gasket. The rear view which shows the external appearance in a rear view in downstream exhaust-system components. The left view which shows the external appearance in the left side view in downstream exhaust-system components. The top view which shows the external appearance in planar view in a DPF side upper attaching part. The bottom view which shows the external appearance in bottom view in downstream exhaust-system components. The front view which shows the external appearance in a front view in downstream exhaust-system components. Explanatory drawing explaining the 1st process of fixing a downstream exhaust system component to an attachment jig. Explanatory drawing explaining the 2nd process of fixing a 2nd bracket and a 3rd bracket to downstream exhaust system components. Explanatory drawing explaining the process of attaching downstream exhaust system components to upstream exhaust system components.

An embodiment of the present invention will be described below with reference to the drawings.
The exhaust system component 20 of the diesel engine 10 in the present embodiment will be described in detail with reference to FIGS.

  1 shows a rear view of the exhaust system component 20 in the diesel engine 10, FIG. 2 shows a right side view of the exhaust system component 20 in the diesel engine 10, and FIG. 3 shows a state in which the downstream exhaust system component 50 is removed. FIG. 4 is an external perspective view of the gasket 40.

5 is a rear view of the downstream exhaust system component 50, FIG. 6 is a left side view of the downstream exhaust system component 50, FIG. 7 is a plan view of the DPF side upper mounting portion 620, and FIG. FIG. 9 shows a bottom view of the downstream exhaust system component 50, and FIG. 9 shows a front view of the downstream exhaust system component 50.
Further, in FIG. 2, the exhaust supercharger 310 is not shown in order to clarify the main part.

  In the drawing, arrows Fr and Rr indicate the vehicle front-rear direction, arrow Fr indicates the vehicle front, and arrow Rr indicates the vehicle rear. Furthermore, arrows Rh and Lh indicate the vehicle width direction, arrow Rh indicates the vehicle right direction, and arrow Lh indicates the vehicle left direction. In addition, the upper side in the figure is the upper side of the vehicle, and the lower side in the figure is the lower side of the vehicle.

  First, as shown in FIGS. 1 and 2, the diesel engine 10 according to the present embodiment is disposed horizontally so that the axial direction of the crankshaft (not shown) is along the vehicle width direction, and the crankshaft is centered. The vehicle upper side is mounted on the vehicle in a slanted state behind the vehicle.

  As shown in FIGS. 1 and 2, the exhaust system component 20 in the diesel engine 10 is close to the vehicle rear surface in the diesel engine 10 in a state of being bent into an inverted substantially U shape in the rear view. Are arranged as follows.

  The exhaust system component 20 includes an upstream exhaust system component 30 connected to the diesel engine 10, a downstream exhaust system component 50 connected to the upstream exhaust system component 30, an upstream exhaust system component 30, and a downstream exhaust system component. 50, and a metal gasket 40 (see FIG. 4) that seals the connection portion with 50.

  The upstream exhaust system component 30 is configured to be able to distribute the exhaust gas discharged from the diesel engine 10 in the right direction of the vehicle. More specifically, as shown in FIG. 3, the upstream exhaust system component 30 is connected to an exhaust port (not shown) configured by joining exhaust passages of the cylinders of the diesel engine 10. The oxidation catalyst 320 and the upstream flange 330 are integrally connected in this order along the vehicle width direction from the diesel engine 10 side. The upstream exhaust system component 30 is connected and supported to the diesel engine 10 via a bracket (not shown).

  As shown in FIG. 3, the exhaust supercharger 310 is configured by integrating a compressor unit 311 and a turbine unit 312. The exhaust supercharger 310 rotates the turbine by the pressure of the exhaust gas introduced from the exhaust port, and compresses the air introduced from the air cleaner (not shown) by a compressor that rotates in conjunction with the rotation of the turbine. And has a function of supplying the inside of the diesel engine 10 via an intake manifold (not shown).

The oxidation catalyst 320 has a function of oxidizing hydrocarbons and carbon monoxide contained in the exhaust gas.
As shown in FIGS. 1 to 3, the upstream flange 330 is a substantially rectangular flat plate having a predetermined thickness in the vehicle width direction, and is disposed so as to face a downstream flange 510 described later in the vehicle width direction. doing. The upstream flange 330 is formed such that the upstream facing surface 331 facing the downstream flange 510 is a substantially vertical plane.

  Further, the upstream flange 330 is formed with an upstream gas flow hole (not shown) that allows the exhaust gas to flow substantially in the center, and is screwed into a screw hole formed in the vicinity of the rear upper part. 332 and a second stud bolt 333 screwed into a screw hole formed substantially at the center in the front vertical direction.

  In addition, an opening hole (not shown) that allows the bolt 334 to pass therethrough is formed in the upstream flange 330 in the vicinity of the lower rear portion, and the bolt 334 is allowed to be screwed into the left side surface through the opening hole. Weld nut 335 is welded.

  Further, the first stud bolt 332 and the second stud bolt 333 allow the nut 336 and the nut 337 to be fastened to fasten the upstream flange 330 and the downstream flange 510.

  The gasket 40 is interposed so as to be sandwiched between the upstream flange 330 and the downstream flange 510, thereby closing the gap between the upstream flange 330 and the downstream flange 510, and exhaust gas flows out to the outside. It has a function to prevent it.

  As shown in FIG. 4, the gasket 40 is a metal thin plate having a substantially triangular shape when viewed from the right side, and has a gas flow opening 41 that allows the flow of exhaust gas at an approximately central position. Although the detailed illustration is omitted, the gasket 40 is formed of an approximately triangular thin plate, an elastic thin plate in the vehicle right direction, an elastic thin plate in the vehicle left direction, and an approximately triangular thin plate in the vehicle right direction. Are overlapped in this order, and are integrally formed by caulking along the edge of the gas flow opening 41.

  Further, the gasket 40 is formed with a first through hole 42, a second through hole 43 and an end opening hole 44 penetrating in the vehicle width direction, and standing upright in the vicinity of the end opening hole 44. A portion 45 is provided.

The first through hole 42 is formed in the vicinity of the upper portion of the gasket 40 so as to allow the insertion of the first stud bolt 332 in the upstream flange 330.
The second through hole 43 is formed in the vicinity of the rear lower part of the gasket 40 so as to allow the insertion of the bolt 334 that fastens the upstream flange 330 and the downstream flange 510.

  The end opening hole 44 is formed in an opening shape in the vicinity of the lower front portion so as to allow the second stud bolt 333 to be inserted, and has an end opening shape in which the front side of the vehicle is opened. More specifically, the end opening hole 44 is formed in a shape in which the front side of the vehicle is opened in the rotation direction around the first through hole 42.

  The standing portion 45 is formed so as to extend from the edge on the lower side of the opening in the end opening hole 44 toward the front of the vehicle in the rotation direction around the first through hole 42. More specifically, the standing portion 45 extends from the edge portion below the opening in the end opening hole 44 and is curved toward the rear of the vehicle, and the tip of the curved portion 45a is directed to the right of the vehicle. It is integrally formed with the tip portion 45b turned back.

  The downstream exhaust system component 50 is configured to be able to distribute the exhaust gas derived from the upstream exhaust system component 30 from the lower side of the vehicle toward the left side of the vehicle. More specifically, as shown in FIGS. 1 and 5, the downstream exhaust system component 50 includes a downstream flange 510 facing the upstream flange 330, a U-shaped pipe 520 extending from the downstream flange 510, a DPF 530, The exhaust pipe 540 is integrally connected in this order from the upstream side.

  As shown in FIGS. 5 and 6, the downstream flange 510 has a substantially triangular flat plate shape with a predetermined thickness in the vehicle width direction and is opposed to the upstream flange 330 in the vehicle width direction. It is arranged. The downstream flange 510 is formed such that the downstream facing surface 511 facing the upstream facing surface 331 of the upstream flange 330 is a substantially vertical plane.

  Further, the downstream flange 510 is provided with a downstream gas flow hole 512 that allows the exhaust gas to flow substantially at the center, and a first downstream opening hole 513 that penetrates in the vehicle width direction, and a second downstream opening. A hole 514 and a third downstream opening hole 515 are formed.

The first downstream opening hole 513 is formed in a size that allows the insertion of the first stud bolt 332 screwed into the upstream flange 330 in the vicinity of the upper portion of the downstream flange 510.
The second downstream opening hole 514 is formed with a size allowing the insertion of the bolt 334 in the vicinity of the lower rear portion of the downstream flange 510.

  The third downstream opening hole 515 is formed in an end opening shape in which the second stud bolt 333 is inserted in the vicinity of the lower front portion of the downstream flange 510 and the front side of the vehicle is open. Yes. More specifically, the third downstream opening hole 515 is formed in a shape in which the front side of the vehicle is open in the rotational direction centering on the first downstream opening hole 513.

  As shown in FIG. 5, the U-shaped pipe 520 allows the exhaust gas to flow and is formed into an inverted U-shaped tubular body. More specifically, the U-shaped pipe 520 is formed in a substantially U shape that extends in the right direction of the vehicle from the right side surface of the downstream flange 510 and is curved from the lower side of the vehicle toward the left side of the vehicle.

As shown in FIG. 1, the DPF 530 is disposed on the vehicle lower side of the oxidation catalyst 320 and has a function of collecting and removing particulate matter contained in the exhaust gas introduced from the U-shaped pipe 520.
As shown in FIGS. 5 and 6, the exhaust pipe 540 is a tubular body that allows the exhaust gas to flow therethrough, so that the exhaust gas derived from the DPF 530 is led to a muffler (not shown) disposed at the rear of the vehicle. The DPF 530 is integrally formed on the left side surface.

  As shown in FIGS. 2, 5, and 6, the downstream exhaust system component 50 includes an upper connection support body 60 that supports the upper portion of the downstream exhaust system component 50, and the downstream exhaust system component 50. It is connected to the upstream exhaust system component 30 and the diesel engine 10 via a lower connection support 70 that supports the lower part.

  As shown in FIGS. 5 and 6, the upper connection support 60 includes a first bracket 610 connected to the diesel engine 10, a DPF side upper mounting portion 620 provided on the DPF 530 of the downstream exhaust system component 50, and these Are connected to the second bracket 630, and the turbocharger-side mounting portion 313 formed in the exhaust supercharger 310, the diesel engine 10, and the DPF 530 are connected to each other.

  As shown in FIGS. 1 and 3, the supercharger-side mounting portion 313 protrudes from the turbine portion 312 toward the rear of the vehicle and has a screw hole (not shown) that allows the bolt 1 to be screwed. It has a shape to have.

  Furthermore, as shown in FIG. 6, the supercharger-side contact surface 313 a with which the second bracket 630 contacts the supercharger-side mounting portion 313 is a substantially vertical plane facing the rear of the vehicle, and in plan view The upstream flange 330 is formed so that the relative angle to the upstream facing surface 331 is approximately 90 degrees.

  As shown in FIGS. 3 and 6, the first bracket 610 is formed in a substantially L shape in a side view that can connect the back surface of the diesel engine 10 and the second bracket 630 in the vehicle front-rear direction. The first bracket 610 has a plurality of opening holes (not shown) that allow insertion of the bolt 2 when fastened to the diesel engine 10 and screw holes that allow screwing of the bolt 3 that fastens the second bracket 630. (Not shown).

  The first bracket-side contact surface 611 with which the second bracket 630 of the first bracket 610 contacts is a substantially vertical plane facing the rear of the vehicle when attached to the diesel engine 10, and in plan view, The upstream flange 330 is formed so that the relative angle with respect to the upstream facing surface 331 is approximately 90 degrees.

  As shown in FIGS. 6 and 7, the DPF side upper mounting portion 620 includes a first member 621 to which the second bracket 630 is fastened, and a second member 625 that connects and supports the first member 621 and the DPF 530. The DPF 530 is welded and fixed near the left end.

  The first member 621 is formed by bending a plate material having a predetermined thickness into a substantially U shape in plan view with an opening at the front of the vehicle. More specifically, the first member 621 includes a left side surface portion 622 that contacts the left side surface of the DPF 530 in the vehicle width direction, a back surface portion 623 that extends in the vehicle right direction from the rear end of the left side surface portion 622, and a back surface portion 623. And a right side surface portion 624 extending obliquely forward of the vehicle.

  Further, a bolt 4 for fastening the second bracket 630 is formed in the back surface portion 623 so that the bolt 4 can be inserted therethrough, and a weld nut (not shown) that allows screwing of the bolt 4 is welded to the front side of the vehicle. Screw holes 623a are provided.

  The second member 625 is a plate material having a predetermined thickness, and is formed by bending so as to connect the DPF 530 and the first member 621. More specifically, the second member 625 includes a base portion 626 formed so as to conform to the outer shape of the DPF 530, and a right side portion of the first member 621 while standing from the left end of the base portion 626 toward the rear of the vehicle. 624 and a side wall portion 627 that abuts in the thickness direction are integrally formed.

The first member 621 has the left side surface portion 622 welded and fixed to the DPF 530 so that the back surface portion 623 with which the second bracket 630 abuts faces obliquely upward. On the other hand, the second member 625 has a base portion 626 fixed to the DPF 530 by welding and a side wall portion 627 fixed to the right side surface portion 624 of the first member 621 by welding.
The first member 621 and the second member 625 are welded to the DPF 530 with a predetermined jig so that the relative positions of the screw hole 623a of the back surface portion 623 are adjusted to a desired position.

  As shown in FIGS. 5 to 7, the second bracket 630 is a three-dimensional shape in which a plate material having a predetermined thickness is formed in a substantially triangular shape when viewed from the rear of the vehicle, and both ends in the vehicle width direction are bent toward the rear of the vehicle. Is formed.

  More specifically, the second bracket 630 includes a first contact surface 631 that contacts the supercharger-side contact surface 313a of the supercharger-side mounting portion 313, and a second contact surface 632 that contacts the first bracket 610. And a third abutment surface 633 that abuts against the back surface portion 623 of the first member 621, and has a shape having a vehicle front side surface. That is, with respect to the first contact surface 631, the second contact surface 632 is disposed so as to be offset forward of the vehicle, and the third contact surface 633 is disposed so as to be inclined obliquely downward.

  The first contact surface 631, the second contact surface 632, and the third contact surface 633 have a first insertion hole 634, a second insertion hole 635, which allow the bolts 1, 3, and 4 to be inserted, respectively. The third insertion hole 636 is formed as an opening. The first insertion hole 634, the second insertion hole 635, and the third insertion hole 636 are a screw hole of the supercharger side mounting portion 313, a screw hole of the first bracket 610, and a screw of the DPF side upper mounting portion 620, respectively. It has a larger diameter than the hole 623a.

  As shown in FIGS. 6, 8, and 9, the lower connection support body 70 includes a DPF-side lower mounting portion 710 provided at the bottom of the DPF 530, a pipe-side mounting portion 720 provided on the exhaust pipe 540, and a third While being comprised with the bracket 730, the engine side attaching part 11 formed in the diesel engine 10, the DPF 530, and the exhaust pipe 540 are connected.

  As shown in FIG. 2, the engine-side mounting portion 11 protrudes from the back of the diesel engine 10 toward the rear of the vehicle and has a screw hole (not shown) that allows the bolt 5 to be screwed. Forming.

  Furthermore, the engine side contact surface 11a with which the third bracket 730 contacts the engine side mounting portion 11 is a substantially vertical plane facing the rear of the vehicle as shown in FIG. It is formed so that the relative angle of 330 to the upstream facing surface 331 is approximately 90 degrees.

  As shown in FIG. 8, the DPF side lower mounting portion 710 has a box shape that is substantially rectangular in a bottom view and is fixed to the bottom of the DPF 530 by welding. The DPF-side lower mounting portion 710 is formed by opening a bolt 6 for fastening the third bracket 730 so that the bolt 6 can be inserted therein and by welding and fixing a weld nut (not shown) that allows the bolt 6 to be screwed therein. The screw holes 711 and 712 thus formed are provided at predetermined intervals in the vehicle width direction.

  As shown in FIGS. 2 and 8, the pipe-side attachment portion 720 has a substantially U-shaped three-dimensional shape that is open on the vehicle upper side, and is welded and fixed to the vehicle right side bottom portion of the exhaust pipe 540. The pipe-side attachment portion 720 is formed by opening a bolt 7 for fastening the third bracket 730 so that the bolt 7 can be inserted therein and by welding and fixing a weld nut (not shown) that allows the bolt 7 to be screwed therein. A screw hole 721 is provided.

  As shown in FIGS. 6, 8, and 9, the third bracket 730 is a side surface that can connect the engine side mounting portion 11, the DPF side lower mounting portion 710, and the pipe side mounting portion 720 in the vehicle front-rear direction. It is formed in a substantially T-shape.

  More specifically, the third bracket 730 integrally forms a front portion 731 that connects the engine side mounting portion 11 and the DPF side lower mounting portion 710 and a rear portion 732 that connects the front portion 731 and the pipe side mounting portion 720. doing.

  As shown in FIG. 6, the third bracket-side contact surface 731a with which the engine-side contact surface 11a in the front portion 731 contacts is a substantially vertical plane facing the front of the vehicle, and is upstream in plan view. The flange 330 is formed so that the relative angle with respect to the upstream facing surface 331 is approximately 90 degrees.

  Further, the front portion 731 is formed with two opening holes 731b that allow the bolts 5 to be fastened to the diesel engine 10 to be inserted. The opening hole 731 b of the front portion 731 is formed to have a larger diameter than the screw hole in the engine-side mounting portion 11.

  In addition, upper and lower opening holes 733 and 734 that allow insertion of the bolts 6 fastened to the DPF side lower mounting portion 710 are formed in a portion of the front portion 731 that contacts the DPF side lower mounting portion 710 in the vertical direction. . These upper and lower opening holes 733 and 734 are formed to have a larger diameter than the screw holes 711 and 712 of the DPF side lower mounting portion 710.

  A vertical opening hole 735 that allows insertion of a bolt 7 that is fastened to the pipe side mounting portion 720 is formed in a portion of the rear portion 732 that contacts the pipe side mounting portion 720 in the vertical direction. This upper and lower opening hole 735 is formed to have a larger diameter than the screw hole 721 of the pipe side attachment portion 720.

Next, the process of attaching the downstream exhaust system component 50 to the upstream exhaust system component 30 will be described in detail with reference to FIGS.
10 is an explanatory view for explaining a first step of fixing the downstream exhaust system component 50 to the mounting jig 100, and FIG. 11 shows the second bracket 630 and the third bracket 730 on the downstream exhaust system component 50. FIG. 12 is an explanatory diagram for explaining a process for attaching the downstream exhaust system component 50 to the upstream exhaust system component 30.
Further, in FIG. 10, the illustration of the first fixed portion 110 is omitted, and the illustration of the first bracket 610 is omitted in FIG.

First, the mounting jig 100 which is a mounting means for mounting the second bracket 630 and the third bracket 730 to a desired position with respect to the downstream exhaust system component 50 will be described.
Although not shown in detail, the mounting jig 100 includes a first fixed portion 110 (see FIG. 10) that matches the mounting position of the downstream flange 510 and a second fixed portion that matches the mounting position of the second bracket 630. 120 (refer to FIG. 11) and a third fixed portion 130 (refer to FIG. 11) for matching the mounting position of the third bracket 730 are integrally connected.

As shown in FIG. 10, the first fixed portion 110 has a substantially vertical plane in which the downstream facing surface 511 of the downstream flange 510 can abut on the right side of the vehicle, and is fitted with the downstream flange 510. It is formed so that it can be fixed.
The plane with which the downstream flange 510 abuts on the first fixed portion 110 corresponds to the upstream facing surface 331 of the upstream flange 330, and this is the reference surface 111.

  The second fixed portion 120 has a relative position with respect to the reference surface 111, a relative position of the supercharger side mounting portion 313 with respect to the upstream facing surface 331, and a relative position of the rear end of the first bracket 610 with respect to the upstream facing surface 331. It is almost the same.

  More specifically, the second fixed portion 120 is formed by integrally forming a substantially vertical plane on which the first abutment surface 631 can abut and a substantially vertical plane on which the second abutment surface 632 can abut. 1 jig side contact surface 121 is formed in the shape which has toward the vehicle rear. The first jig-side contact surface 121 is formed in an orientation in which the relative angle with respect to the reference surface 111 is approximately 90 degrees in plan view.

The third fixed portion 130 is configured such that the relative position with respect to the reference surface 111 is substantially the same as the relative position of the engine-side mounting portion 11 with respect to the upstream facing surface 331.
More specifically, the third fixed portion 130 is formed in a shape having a second jig-side contact surface 131 that is a substantially vertical flat surface with which the third bracket-side contact surface 731a can contact toward the rear of the vehicle. doing. The second jig side abutting surface 131 is formed in an orientation in which the relative angle to the reference surface 111 is approximately 90 degrees in plan view.

  Subsequently, a step of attaching the second bracket 630 and the third bracket 730 to the downstream exhaust system component 50 using the mounting jig 100 described above, and a step of attaching the downstream exhaust system component 50 to the upstream exhaust system component 30. Will be described.

  First, as shown in FIG. 10, the downstream facing surface 511 of the downstream flange 510 is brought into contact with the reference surface 111 of the first fixed portion 110, and the downstream exhaust system component 50 is moved to the first fixed portion 110. Secure to.

  When the downstream exhaust system component 50 is fixed to the first fixed part 110, the first contact surface 631 and the second contact surface 632 are connected to the first jig of the second fixed part 120 as shown in FIG. The second bracket 630 is fastened to the DPF side upper mounting portion 620 using the bolt 4 while being in contact with the side contact surface 121.

  Further, the third bracket 730 is attached to the lower portion of the DPF side using the bolts 6 and 7 while the third bracket side contact surface 731a is in contact with the second jig side contact surface 131 of the third fixed portion 130. It fastens to the part 710 and the pipe side attachment part 720.

  Thereafter, the downstream exhaust system component 50 having the second bracket 630 and the third bracket 730 attached thereto is changed from the upstream exhaust system component 30 in the diesel engine 10 to which the first bracket 610 and the upstream exhaust system component 30 are previously attached. Install.

  More specifically, as shown in FIG. 12A, the gasket 40 is suspended from the first stud bolt 332 of the upstream flange 330 through the first through hole 42. A nut 337 is screwed in advance with the second stud bolt 333 of the upstream flange 330.

  When the gasket 40 is suspended from the upstream side flange 330, as shown in FIG. 12B, the downstream side exhaust system in a state where the first downstream side opening hole 513 is rotated at a predetermined angle toward the rear of the vehicle with the rotation center as the rotation center. The component 50 is suspended from the first stud bolt 332 of the upstream flange 330 through the first downstream opening hole 513.

  Then, the downstream exhaust system component 50 is rotated in the rotation direction S, and the attachment positions of the upstream flange 330 and the downstream flange 510 are matched. At this time, since the downstream flange 510 and the standing portion 45 of the gasket 40 abut in the rotation direction S, the gasket 40 follows the rotation of the downstream exhaust system component 50 and rotates the first stud bolt 332. It rotates in the direction of rotation S as the axis.

Subsequently, when the downstream exhaust system component 50 is rotated in the rotation direction S, the rotation of the downstream exhaust system component 50 and the gasket 40 in the rotation direction S is restricted by the second stud bolt 333.
When the rotation in the rotation direction S is restricted, the opening hole of the upstream flange 330, the second through hole 43, and the second downstream opening hole 514 communicate with each other, so that the bolt 334 is inserted and the weld nut 335 is inserted. Screw together.

  Further, the nut 336 is screwed onto the first stud bolt 332, and the nut 336, the nut 337, and the bolt 334 are tightened to fasten the upstream flange 330 and the downstream flange 510 with the gasket 40 interposed therebetween.

  When the fastening of the upstream exhaust system component 30 and the downstream exhaust system component 50 is completed, the supercharger side mounting portion 313 and the second bracket are fastened using the bolt 1. Further, the first bracket 610 and the second bracket 630 are fastened using the bolt 3. In addition, the engine-side mounting portion 11 and the third bracket 730 are fastened using the bolts 5.

  At this time, for example, when there is a gap in the vehicle front-rear direction between the engine-side mounting portion 11 and the third bracket 730, the downstream-side exhaust system components are brought together with the engine-side mounting portion 11 and the third bracket 730 being fastened together. The 50 U-shaped pipe 520 is elastically deformed so as to bend toward the front of the vehicle.

  Alternatively, when the engine side mounting portion 11 and the third bracket 730 are displaced so as to be in a strong pressure contact, the U side of the downstream side exhaust system component 50 is accompanied by the fastening of the engine side mounting portion 11 and the third bracket 730. The pipe 520 is elastically deformed so as to bend toward the rear of the vehicle.

  Thus, the exhaust system component 20 in the diesel engine 10 is configured by assembling the gasket 40 and the downstream exhaust system component 50 to the upstream exhaust system component 30 fixed to the diesel engine 10.

  The exhaust system component mounting structure of the diesel engine 10 and the exhaust system component mounting method of the diesel engine 10 that realize the mounting structure as described above suppresses the increase in the number of components and suppresses the displacement of the mounting position, and the downstream side. The exhaust system component 50 can be attached to the diesel engine 10.

  Specifically, the first abutment surface 631, the second abutment surface 632, and the third bracket side abutment surface 731a with respect to the reference surface 111 are arranged so that the relative angles thereof are approximately 90 degrees in plan view. 2, the second bracket 630 and the third bracket 730 can be fastened to the downstream exhaust system component 50. Therefore, the exhaust system component mounting structure of the diesel engine 10 and the exhaust system component mounting method of the diesel engine 10 are the second bracket 630. The first abutment surface 631 and the supercharger-side abutment surface 313a of the supercharger-side attachment portion 313 can be made substantially parallel to face each other.

  Furthermore, the exhaust system component mounting structure of the diesel engine 10 and the exhaust system component mounting method of the diesel engine 10 have the second contact surface 632 and the first bracket side contact surface 611 of the first bracket 610 substantially parallel. While making it oppose, the 3rd bracket side contact surface 731a of the 3rd bracket 730 and the engine side contact surface 11a of the engine side attaching part 11 can be made substantially parallel and made to oppose.

  For this reason, the mounting position shift between the supercharger side mounting portion 313 and the second bracket 630, the mounting position shift between the first bracket 610 and the second bracket 630, and the engine side mounting portion 11 and the third bracket 730 The displacement of the mounting position of the vehicle occurs in the vehicle longitudinal direction, the vehicle width direction, and the vehicle vertical direction.

  At this time, since the first insertion hole 634 and the second insertion hole 635 of the second bracket 630 and the opening hole 731b of the third bracket 730 are formed with a large diameter, the exhaust system component mounting structure of the diesel engine 10, The exhaust system component mounting method of the diesel engine 10 includes a displacement of the mounting position between the supercharger side mounting portion 313 and the second bracket 630 in the vehicle width direction and the vehicle vertical direction, and the first bracket 610 and the second bracket 630. And the displacement of the attachment position between the engine side attachment portion 11 and the third bracket 730 can be easily eliminated.

  That is, the displacement of the attachment position between the supercharger side attachment portion 313 and the second bracket 630, the displacement of the attachment position between the first bracket 610 and the second bracket 630, and the displacement between the engine side attachment portion 11 and the third bracket 730. The displacement of the mounting position is slightly caused in the vehicle front-rear direction.

  Therefore, by providing the U-shaped piping 520 in the downstream exhaust system component 50, the exhaust system component mounting structure of the diesel engine 10 and the exhaust system component mounting method of the diesel engine 10 are excessive due to the bending of the U-shaped piping 520. The feeder-side mounting portion 313 and the second bracket 630, and the engine-side mounting portion 11 and the third bracket 730 can be appropriately brought into contact with each other.

  More specifically, for example, when the engine side mounting portion 11 and the third bracket 730 are separated from each other, the U-shaped pipe 520 is bent forward of the vehicle as the engine side mounting portion 11 and the third bracket 730 are fastened. The exhaust system component mounting structure of the diesel engine 10 and the exhaust system component mounting method of the diesel engine 10 can easily contact the engine-side contact surface 11a and the third bracket-side contact surface 731a without a gap. .

  Alternatively, when the engine side mounting portion 11 and the third bracket 730 are displaced so that they are in strong pressure contact, the U-shaped pipe 520 is bent rearward of the vehicle, so that the exhaust system component mounting structure of the diesel engine 10 and the diesel engine 10 In this exhaust system component mounting method, the engine side mounting portion 11 and the third bracket 730 can be brought into contact with each other with an appropriate pressure.

  Thereby, the exhaust system component mounting structure of the diesel engine 10 and the exhaust system component mounting method of the diesel engine 10 can be performed without releasing the fastening of the DPF side lower mounting portion 710 and the pipe side mounting portion 720 and the third bracket 730. The displacement of the mounting position between the engine side mounting portion 11 and the third bracket 730 can be easily eliminated.

  Furthermore, due to the flexibility of the U-shaped pipe 520, the exhaust system component mounting structure of the diesel engine 10 and the exhaust system component mounting method of the diesel engine 10, for example, force the engine side mounting portion 11 and the third bracket 730. Compared with the case where the gap is closed by fastening, it is possible to prevent unintended stress from being applied to the third bracket 730, the DPF side lower mounting portion 710, the pipe side mounting portion 720, and the like.

  In addition, the exhaust system component mounting structure of the diesel engine 10 and the exhaust system component mounting method of the diesel engine 10 adjust the mounting position of the downstream exhaust system component 50 and the third bracket 730, or An intermediate bracket or the like for adjusting the attachment position with the three bracket 730 can be eliminated.

  Therefore, the exhaust system component mounting structure of the diesel engine 10 and the exhaust system component mounting method of the diesel engine 10 are the same as the mounting structure of the diesel engine 10, the downstream exhaust system component 50, the second bracket 630, and the third bracket 730. Can be prevented from becoming complicated.

  In addition, although the case where there is a gap between the engine side mounting portion 11 and the third bracket 730, or the case where the pressure contact is made has been described, the space between the supercharger side mounting portion 313 and the second bracket 630, or the Even when there is a gap between the first bracket 610 and the second bracket 630 or when a strong pressure contact is made, the same effect as described above can be obtained.

  Therefore, the exhaust system component mounting structure of the diesel engine 10 and the exhaust system component mounting method of the diesel engine 10 suppress the increase in the number of components and suppress the displacement of the mounting position, so that the downstream exhaust system component 50 can be connected to the diesel engine. 10 can be easily attached.

  Further, the first member 621 to which the second bracket 630 is fastened and the second member 625 fixed to the DPF 530 of the downstream exhaust system component 50 are configured, and the first member 621 and the second member 625 are integrated. Thus, by configuring the DPF side upper mounting portion 620, the exhaust system component mounting structure of the diesel engine 10 can mount the downstream exhaust system component 50 to the diesel engine 10 with high accuracy.

  Specifically, for example, when the DPF 530 and the DPF side upper mounting portion of the downstream side exhaust system component 50 are configured separately, the exhaust system component mounting structure of the diesel engine 10 due to manufacturing variation of the DPF side upper mounting portion, etc. There is a risk that the displacement of the mounting positions of the second bracket 630, the supercharger side mounting portion 313, and the first bracket 610 will increase.

  For this reason, the exhaust system component mounting structure of the diesel engine 10 eliminates the displacement of the mounting position only by the shape of the first insertion hole 634 and the second insertion hole 635 of the second bracket 630 or the flexibility of the U-shaped pipe 520. It becomes difficult to do. That is, the engine exhaust system component mounting structure cannot accurately mount the downstream exhaust system component 50 to the diesel engine 10.

  Therefore, by configuring the DPF side upper mounting portion 620 with the first member 621 and the second member 625, the exhaust system component mounting structure of the diesel engine 10 has the relative position between the first member 621 and the second member 625. It can be adjusted and fixed to the DPF 530.

  Thereby, the exhaust system component mounting structure of the diesel engine 10 can easily suppress the positional deviation of the DPF side upper mounting portion 620 with respect to the reference surface 111. For this reason, the exhaust system component mounting structure of the diesel engine 10 can further suppress displacement of mounting positions of the second bracket 630, the supercharger side mounting portion 313, and the first bracket 610.

  Therefore, the exhaust system component mounting structure of the diesel engine 10 accurately mounts the downstream exhaust system component 50 to the diesel engine 10 by the DPF side upper mounting portion 620 configured by the first member 621 and the second member 625. be able to.

  Further, the upstream exhaust system component 30 includes an exhaust supercharger 310 and an oxidation catalyst 320 in this order from the exhaust port side, and the downstream exhaust system component 50 includes a U-shaped pipe 520 and a DPF 530 on the downstream flange 510. In this order, the exhaust system component mounting structure of the diesel engine 10 suppresses an increase in the number of components and suppresses the displacement of the mounting position, so that the downstream exhaust system component 50, which is a heavy object, is installed in the diesel engine. 10 can be easily attached.

  In addition, the exhaust system component mounting structure of the diesel engine 10 is configured in the vehicle front-rear direction by a U-shaped pipe 520 that is configured so that the oxidation catalyst 320 and the DPF 530 are juxtaposed in the vertical direction of the vehicle. The displacement of the mounting position between the diesel engine 10 and the downstream exhaust system component 50 in the direction can be eliminated with a simple structure.

  Specifically, since it is curved so as to reverse the flow direction of the exhaust gas, the U-shaped pipe 520 has a shape having a curved portion that is greatly curved. For this reason, the curved portion of the U-shaped pipe 520 is a portion having low bending rigidity in the downstream exhaust system component 50.

  Thereby, the exhaust system component mounting structure of the diesel engine 10 can easily bend the U-shaped pipe 520 in the vehicle front-rear direction. That is, the exhaust system component mounting structure of the diesel engine 10 can easily eliminate the displacement of the mounting position with a simple configuration as compared with the case where the U-shaped pipe 520 is formed in a bellows shape, for example.

  Therefore, the exhaust system component mounting structure of the diesel engine 10 can suppress the increase in the number of components by the U-shaped pipe 520 having the curved portion, and can easily mount the downstream exhaust system component 50 to the diesel engine 10.

In correspondence between the configuration of the present invention and the above-described embodiment,
The engine of the present invention corresponds to the diesel engine 10 of the embodiment,
Similarly,
The exhaust system mounting part corresponds to the upstream exhaust system part 30,
The exhaust system parts correspond to the downstream exhaust system parts 50,
The support member mounting portion corresponds to the supercharger side mounting portion 313, the first bracket 610, and the engine side mounting portion 11,
The fastened portion corresponds to the DPF side upper mounting portion 620, the DPF side lower mounting portion 710, and the pipe side mounting portion 720,
The support member corresponds to the second bracket 630 and the third bracket 730,
The exhaust facing surface corresponds to the downstream facing surface 511,
The support contact surface corresponds to the first contact surface 631, the second contact surface 632, and the third bracket side contact surface 731a,
The surface of the support member mounting portion with which the support contact surface contacts corresponds to the supercharger side contact surface 313a, the first bracket side contact surface 611, and the engine side contact surface 11a.
The predetermined angle corresponds to approximately 90 degrees in plan view,
The predetermined reference plane corresponds to the reference plane 111,
The vertical direction substantially perpendicular to the support contact surface corresponds to the vehicle longitudinal direction,
The flexible tubular portion corresponds to the U-shaped pipe 520,
The first fastened member corresponds to the first member 621,
The body part of the exhaust system parts corresponds to DPF530,
The second fastened member corresponds to the second member 625,
The catalytic converter corresponds to the oxidation catalyst 320,
The distribution direction corresponds to the vehicle width direction,
The direction substantially orthogonal to the distribution direction corresponds to the vehicle vertical direction,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

  For example, in the above-described embodiment, the inverted tubular U-shaped pipe 520 is used as the flexible tubular portion. However, the present invention is not limited to this. For example, the pipe is curved in a crank shape, or the bellows shape. It is good also as piping of this.

  Moreover, although the case where the downstream side exhaust system component 50 to which the second bracket 630 and the third bracket 730 are attached is described with respect to the upstream side exhaust system component 30 attached to the diesel engine 10, it is not limited thereto. Even when the upstream exhaust system component 30 is attached to the diesel engine 10 or when the exhaust system component 20 in which the upstream exhaust system component 30 and the downstream exhaust system component 50 are assembled is attached to the diesel engine 10. Good.

  Moreover, although it was set as the structure which attached the 1st bracket 610 to the diesel engine 10, it is not limited to this, The 1st bracket 610 was previously attached to the downstream exhaust-system components 50 with the 2nd bracket 630 and the 3rd bracket 730. After that, it may be attached to the diesel engine 10.

DESCRIPTION OF SYMBOLS 10 ... Diesel engine 11 ... Engine side attaching part 11a ... Engine side contact surface 30 ... Upstream exhaust system component 50 ... Downstream exhaust system part 111 ... Reference plane 310 ... Exhaust supercharger 313 ... Supercharger side attaching part 313a ... supercharger-side contact surface 320 ... oxidation catalyst 330 ... upstream flange 510 ... downstream flange 511 ... downstream facing surface 520 ... U-shaped pipe 530 ... DPF
610 ... first bracket 611 ... first bracket side contact surface 620 ... DPF side upper mounting portion 621 ... first member 625 ... second member 630 ... second bracket 631 ... first contact surface 632 ... second contact surface 710: DPF side lower mounting portion 720 ... Pipe side mounting portion 730 ... Third bracket 731a ... Third bracket side contact surface

Claims (5)

An exhaust system component that allows the exhaust gas discharged from the engine to flow and is fastened to an exhaust system mounting portion provided on the engine side;
A support member mounting portion provided on the engine side, and at least one support member that supports the exhaust system component by fastening to a fastened portion provided in the exhaust system component,
An exhaust system part mounting structure for an engine for fastening the exhaust system part to which the support member is fastened to the engine,
The surface of the exhaust system component facing the exhaust system mounting portion is an exhaust facing surface,
The surface of the support member that contacts the support member mounting portion as a support contact surface,
The surface of the support member mounting portion with which the support contact surface comes into contact,
A relative angle with respect to the surface of the exhaust system mounting portion facing the exhaust facing surface is formed to be a predetermined angle,
For the exhaust system component having the exhaust facing surface in contact with a predetermined reference surface,
The support member;
In a state where the relative angle of the support contact surface with respect to the predetermined reference surface is arranged to be the predetermined angle, it is configured to be fastened to the fastened portion,
In the exhaust system parts,
An exhaust system component mounting structure for an engine comprising a flexible tubular portion that allows the exhaust gas to flow and has flexibility in a vertical direction substantially perpendicular to the support contact surface. The fastened portion is
A first fastened member to which at least the support member is fastened;
And at least a second fastened member fixed to the main body portion of the exhaust system component,
The exhaust system component mounting structure for an engine according to claim 1, wherein the first fastened member and the second fastened member are integrally formed. The exhaust system mounting part,
It is fastened to the exhaust port of the engine and comprises an upstream exhaust system component having an upstream flange at the downstream end,
The exhaust system parts,
A downstream exhaust system component connected to the upstream exhaust system component via a downstream flange facing the upstream flange;
In the upstream exhaust system parts,
An exhaust supercharger and a catalytic converter are provided in this order from the exhaust port side,
In the downstream exhaust system parts,
The exhaust system component mounting structure for an engine according to claim 1 or 2, wherein the flexible tubular portion and the diesel particulate filter are provided in this order from the downstream flange. The upstream flange and the downstream flange,
Arranged in the flow direction of the exhaust gas flowing through the catalytic converter of the upstream exhaust system parts,
In a direction substantially orthogonal to the flow direction, the catalytic converter and the diesel particulate filter are arranged side by side,
The flexible tubular portion;
The exhaust system component mounting structure for an engine according to claim 3, wherein the exhaust system component mounting structure is formed in a curved shape so as to reverse the flow direction of the exhaust gas. An exhaust system component that allows the exhaust gas discharged from the engine to flow and is fastened to an exhaust system mounting portion provided on the engine side;
A support member mounting portion provided on the engine side, and at least one support member that supports the exhaust system component by fastening to a fastened portion provided in the exhaust system component,
An exhaust system parts mounting method for an engine for fastening the exhaust system parts fastened to the support member to the engine,
Attaching the exhaust system component to the predetermined reference surface by bringing an exhaust facing surface of the exhaust system component facing the exhaust system mounting portion into contact with a predetermined reference surface;
A step of arranging the support contact surface of the support member that contacts the support member mounting portion so as to have a predetermined relative angle with respect to the predetermined reference surface;
Fastening the support member to the fastened portion;
Fastening the exhaust system component to the exhaust system mounting portion;
A flexible tubular portion that allows the exhaust gas to flow and has flexibility,
An exhaust system component mounting method for an engine comprising: a step of fastening the support member to the support member mounting portion while being bent in a vertical direction substantially perpendicular to the support contact surface.

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