JP2018178909A - Supercharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrain a supercharging device including a plurality of super-chargers from becoming large-sized.SOLUTION: A supercharging device 1 is formed by fastening a first member 100 and a second member 200 produced separately by a plurality of bolts 90. At the first member 100, a first communication passage 110 and a second communication passage 120 are formed communicated with turbines T1, T2 respectively. At the second member 200, an exhaust pipe 210 to which exhaust air from an engine is supplied, and a flange member 220 for fastening the exhaust pipe 210 to the second member 200 are provided. The flange member 220 includes: an insertion surface S1 in which an insertion port H3 is formed in which the exhaust pipe 210 is inserted; and a contact surface S2 in which a first exhaust port H1 and a second exhaust port H2 are formed communicated with the first communication passage 110 and the second communication passage 120, respectively. The insertion port H3, the first exhaust port H1 and the second exhaust port H2 are communicated with each other in the flange member 220.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a supercharger including a plurality of superchargers.

  Japanese Patent Laid-Open No. 2011-106358 (Patent Document 1) discloses a supercharger including two superchargers connected in series in the flow direction of exhaust gas from an engine. In this supercharging device, the branch portion for branching the flow of exhaust gas from the engine into a first communication passage communicating with the upstream turbocharger and a second communication passage communicating with the downstream turbocharger is the engine Provided in the exhaust pipe of

JP, 2011-106358, A

  A member (hereinafter, also referred to as a "first member") in which a plurality of communication paths respectively communicating with a plurality of turbochargers is formed as an actual component constituting the turbocharger disclosed in Patent Document 1; There is a case where a member to be formed (hereinafter also referred to as a "second member") is separately manufactured. Furthermore, in order to fasten the second member to the first member with a bolt or the like, a flange portion may be provided at the end of the second member. In this case, the flange portion is manufactured by welding to the exhaust pipe after being manufactured as a separate member from the exhaust pipe instead of being integrally manufactured by casting from the viewpoint of weight reduction etc. Is desirable.

  However, when the flange member is welded to the exhaust pipe, there is a concern that the exhaust pipe has a complicated shape and becomes large. Specifically, when welding the flange member to the exhaust pipe, an insertion port into which the exhaust pipe is inserted is provided in the flange member, and both are welded in a state where the exhaust pipe is inserted into the insertion port. Moreover, when providing a branch part in an exhaust pipe, several branch exhaust pipe will be formed in the edge part of an exhaust pipe. In this case, the flange members are provided with a plurality of insertion ports into which a plurality of branch exhaust pipes are respectively inserted, and the plurality of branch exhaust pipes are welded to each other in a state of being respectively inserted into the plurality of insertion ports. Therefore, it is necessary to apply a bending process to the exhaust pipe to form a plurality of branch exhaust pipes so as to be respectively insertable into the flange member, and a so-called bend R (radius) is formed at that time. It is feared that the bending R is one of the factors and the exhaust pipe has a complicated shape, which may lead to an increase in size of the supercharging device.

  This indication is made in order to solve an above-mentioned subject, and the purpose is to control that a supercharger provided with a plurality of superchargers enlarges.

  (1) A supercharger according to the present disclosure comprises a plurality of superchargers. The supercharger includes a first member in which a plurality of communication paths respectively communicating with the plurality of turbochargers are formed, and a second member fastened to the first member. The second member has an exhaust pipe to which exhaust gas from the engine is supplied, and a flange member for fastening the exhaust pipe to the first member. The flange member is in contact with the first member and an insertion surface in which the insertion hole into which the exhaust pipe is inserted is formed, and a plurality of discharge ports respectively communicating with the plurality of communication paths of the first member. Including a contact surface. The insertion port in the insertion surface and the plurality of discharge ports in the contact surface communicate with each other in the inside of the flange member.

  According to the above configuration, the insertion port in the insertion surface of the flange member and the plurality of discharge ports in the contact surface of the flange member communicate with each other in the inside of the flange member. Therefore, after the exhaust gas from the exhaust pipe is supplied from the insertion port to the inside of the flange member, it is branched into a plurality of discharge ports inside the flange member and supplied to the plurality of communication paths of the first member. As a result, it is not necessary to provide a branch portion in the exhaust pipe, and it is not necessary to apply bending to the exhaust pipe to form a plurality of branched exhaust pipes so as to be insertable into the flange member, respectively. Can be suppressed. As a result, it is possible to suppress an increase in size of a supercharger including a plurality of superchargers.

  (2) In one embodiment, when the flange member is viewed in the direction from the insertion surface side toward the contact surface, the plurality of discharge ports are located inside the insertion port. The thickness of the inner part of the insertion opening in the flange member and the outer part of the plurality of discharge openings is thinner than the thickness of the outer part of the insertion opening in the flange member.

  According to the above configuration, by making the thickness of the portion inside the insertion port and the outside of the plurality of exhaust ports in the flange member thinner than the thickness outside the insertion port, the branch portion of the exhaust path can be made inside the flange member It can be formed.

  (3) In one embodiment, the flange member is formed by overlapping the flange body in which the insertion port is formed and the auxiliary member in which the plurality of discharge ports are formed.

  According to the above configuration, the flange member can be formed by a simple construction method in which the flange main body in which the insertion port is formed and the auxiliary member in which the plurality of discharge ports are formed separately are made to overlap one another. it can.

  (4) In one embodiment, the first member further includes an on-off valve provided inside any of the plurality of communication paths. In the closed state, the on-off valve closes the discharge port by abutting on the periphery of any one of a plurality of discharge ports formed on the contact surface of the flange member.

  According to the above configuration, it is possible to form the member in contact with the on-off valve with the flange member of the second member while providing the on-off valve on the first member.

It is a figure shown typically showing an example of the whole composition of a supercharging device. It is a figure (the 1) showing section structure near the branching part of the exhaust passage of a supercharger. It is the figure which looked at the auxiliary member in the direction which goes to contact surface S2 from the insertion surface S1 side of a flange member. It is the figure (the 1) which looked at the flange member in the direction which goes to contact surface S2 from the insertion surface S1 side of a flange member. It is a figure (the 2) showing the section structure near the branching part of the exhaust passage of a supercharger. It is the figure (the 2) which looked at the flange member in the direction which goes to contact surface S2 from the insertion surface S1 side of a flange member. It is a figure which shows an example of a structure of the supercharging apparatus by the comparative example with respect to this Embodiment.

  Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference characters and description thereof will not be repeated.

  FIG. 1: is a figure which shows typically an example of the whole structure of the supercharging apparatus 1 by this Embodiment.

  The supercharger 1 includes a first supercharger 10 and a second supercharger 20. The first turbocharger 10 and the second turbocharger 20 are connected in series in the flow direction of the exhaust from the engine 500. In addition, the number of the superchargers with which the supercharging apparatus 1 is equipped is not particularly limited to two, and may be three or more.

  The first supercharger 10 is disposed upstream of the second supercharger 20 in the flow direction of the exhaust gas. The first turbocharger 10 includes a turbine T1, a compressor C1, and a shaft 15. The turbine T1 includes a scroll passage 11 and a turbine impeller 12. The compressor C <b> 1 includes a scroll passage 13 and a compressor impeller 14. The turbine impeller 12 and the compressor impeller 14 are connected by a shaft 15. Thereby, the turbine impeller 12 and the compressor impeller 14 rotate integrally.

  The second turbocharger 20 is disposed downstream of the first turbocharger 10 in the flow direction of the exhaust gas. The second turbocharger 20 includes a turbine T2, a compressor C2, and a shaft 25. The turbine T2 includes a scroll passage 21 and a turbine impeller 22. The compressor C2 includes a scroll passage 23 and a compressor impeller 24. The turbine impeller 22 and the compressor impeller 24 are connected by a shaft 25. Thereby, the turbine impeller 22 and the compressor impeller 24 rotate integrally.

  The supercharging device 1 includes an exhaust passage 30, an exhaust switching valve 40, an intake passage 50, and an intake switching valve 60 in addition to the first supercharger 10 and the second supercharger 20.

  The exhaust passage 30 is a passage for discharging the exhaust from the engine 500 to the outside. In the middle of the exhaust passage 30, a turbine T1 of the first turbocharger 10 and a turbine T2 of the second turbocharger 20 are provided.

  The exhaust passage 30 includes a first exhaust passage 31, a second exhaust passage 32, a third exhaust passage 33, a fourth exhaust passage 34, and a fifth exhaust passage 35.

  The first exhaust passage 31 communicates the exhaust port of the engine 500 with the branch portion A. The first exhaust passage 31 is branched into a second exhaust passage 32 and a fourth exhaust passage 34 at a branch portion A.

  The second exhaust passage 32 communicates the branch portion A with the scroll passage 11 of the first turbocharger 10 turbine T1. The third exhaust passage 33 communicates the discharge port of the first turbocharger 10 with the turbine T1 and the scroll passage 21 of the turbine T2 of the second turbocharger 20. The second exhaust passage 32 and the third exhaust passage 33 are passages for supplying the exhaust discharged from the engine 500 in order of the turbine T1 of the first turbocharger 10 and the turbine T2 of the second turbocharger 20. .

  The fourth exhaust passage (bypass exhaust passage) 34 establishes communication between the branch portion A and the scroll passage 21 of the turbine T2 of the second turbocharger 20. The fourth exhaust passage 34 is a passage for supplying the exhaust gas discharged from the engine 500 to the turbine T2 of the second turbocharger 20 without passing through the turbine T1 of the first turbocharger 10.

The fifth exhaust passage 35 communicates the exhaust port of the turbine T2 of the second turbocharger 20 with the outside.
The exhaust switching valve 40 bypasses the turbine T1 of the first turbocharger 10 to supply exhaust to the turbine T2 of the second turbocharger 20.

  The exhaust switching valve 40 is disposed inside the fourth exhaust passage 34 and in the vicinity of a region where the fourth exhaust passage 34 is connected to the scroll passage 21 of the turbine T2 of the second turbocharger 20. When the exhaust gas switching valve 40 is opened, at least a part of the exhaust gas from the engine 500 is directly supplied to the turbine T2 of the second turbocharger 20 via the fourth exhaust passage 34. The exhaust gas switching valve 40 is opened and closed by an actuator (not shown).

  The intake passage 50 is a passage for drawing the outside air into the engine 500. In the middle of the intake passage 50, the compressor C1 of the first supercharger 10 and the compressor C2 of the second supercharger 20 are provided.

  The intake passage 50 includes a first intake passage 51, a second intake passage 52, a third intake passage 53, a fourth intake passage 54, and a fifth intake passage (bypass intake passage) 55.

  The first intake passage 51 communicates the outside with the intake port of the compressor C2 of the second turbocharger 20. The second intake passage 52 communicates the scroll passage 23 of the compressor C2 of the second turbocharger 20 with the branch portion B. The second intake passage 52 is branched into a third intake passage 53 and a fifth intake passage 55 at the branch portion B.

  The third intake passage 53 communicates the branch portion B with the intake port of the compressor C <b> 1 of the first turbocharger 10. The fourth intake passage 54 establishes communication between the scroll passage 13 of the compressor C1 of the first turbocharger 10 and the intake port of the engine 500.

  The fifth intake passage 55 communicates the branch portion B with the intake port of the engine 500. The fifth intake passage 55 is a passage for supplying the air discharged from the scroll passage 23 of the compressor C2 of the second turbocharger 20 to the engine 500 without passing through the compressor C1 of the first turbocharger 10. It is.

  The intake air switching valve 60 bypasses the compressor C <b> 1 of the first turbocharger 10 to supply air to the engine 500, and is installed in the middle of the fifth intake passage 55. When the intake air switching valve 60 is opened, at least a portion of the air supplied from the compressor C2 of the second turbocharger 20 is directly supplied to the engine 500 via the fifth intake passage 55. The exhaust gas switching valve 40 is opened and closed by an actuator (not shown).

  For example, when the engine 500 is rotating at a low speed, both the exhaust gas switching valve 40 and the intake air switching valve 60 are closed. As a result, the exhaust gas exhausted from the engine 500 is all supplied to the turbine T1 of the first turbocharger 10 and the turbine T2 of the second turbocharger 20. Further, all the intake air is supplied to the compressor C2 of the second supercharger 20 and the compressor C1 of the first supercharger 10.

  On the other hand, when the engine 500 is rotating at high speed, both the exhaust gas switching valve 40 and the intake gas switching valve 60 are in the open state. As a result, most of the exhaust gas exhausted from the engine 500 is directly supplied to the turbine T2 through the fourth exhaust passage 34. Further, part of the air discharged from the compressor C2 is directly supplied to the engine 500 via the fifth intake passage 55.

FIG. 2 is a view showing a cross-sectional structure in the vicinity of the branch portion A of the exhaust passage 30 of the supercharging device 1.
The supercharging device 1 is formed by fastening separately manufactured first and second members 100 and 200 with a plurality of bolts 90.

  The first member 100 includes a first communication passage 110 in communication with the scroll passage 11 of the turbine T1, a second communication passage 120 in communication with the scroll passage 21 of the turbine T2, an exhaust switching valve 40, and a flange member 130. including.

  The exhaust gas switching valve 40 is disposed inside the end (opening) of the second communication passage 120. The exhaust gas switching valve 40 includes a valve body 41, a spindle 42 rotated by an actuator, and an arm 43 connecting the valve body 41 and the spindle 42. The flange member 130 is provided around the end (opening) of the first communication passage 110 and the end (opening) of the second communication passage 120.

  The second member 200 includes an exhaust pipe 210 connected to the exhaust port of the engine 500 and a flange member 220 provided around an end (opening) of the exhaust pipe 210.

  The flange member 220 includes a flange main body 221 and an auxiliary member 225, and is formed by overlapping them.

  The flange main body 221 has an insertion surface S1 in which an insertion port H3 in which an end (opening) of the exhaust pipe 210 is inserted is formed. In the present embodiment, the insertion port H3 is formed by a hole penetrating the flange main body 221.

  The flange main body 221 is welded to the exhaust pipe 210 in a state where the end of the exhaust pipe 210 is inserted into the insertion port H3 formed in the insertion surface S1 of the flange main body 221. That is, in the present embodiment, the flange main body 221 is manufactured integrally with the exhaust pipe 210 by casting, from the viewpoint of weight saving and improvement of the warm-up performance of the catalyst device (not shown) for purifying exhaust gas. Instead, after being manufactured separately from the exhaust pipe 210, the exhaust pipe 210 is welded to the exhaust pipe 210 in a state of being inserted into the insertion port H3.

  The auxiliary member 225 has an abutment surface S2 that abuts on the flange member 130 of the first member 100. The first discharge port H1 and the second discharge port H2 respectively communicating with the first communication passage 110 and the second communication passage 120 of the first member 100 are formed on the contact surface S2 of the auxiliary member 225. The first outlet H1 and the second outlet H2 are respectively formed by holes penetrating the auxiliary member 225.

  The valve body 41 of the exhaust gas switching valve 40 closes the first discharge port H1 by coming into contact with the periphery of the first discharge port H1 formed on the contact surface S2 of the auxiliary member 225 of the second member 200 in the closed state. Do.

  A gasket (not shown) is provided between the flange member 130 of the first member 100 and the auxiliary member 225 of the second member 200 and between the auxiliary member 225 of the second member 200 and the flange member 220. . When the auxiliary member 225 of the second member 200 also has the function of a gasket, the gasket may be omitted.

  As shown in FIG. 2, in the present embodiment, an insertion port H3 formed on the insertion surface S1 of the flange member 220 and a first discharge port H1 and a second discharge port formed on the contact surface S2 of the flange member 220. The outlet H 2 communicates with the inside of the flange member 220. That is, the branch part A shown in FIG. 1 is formed inside the flange member 220 shown in FIG. The first exhaust passage 31 shown in FIG. 1 is formed by the exhaust pipe 210 shown in FIG. A second exhaust passage 32 shown in FIG. 1 is formed by a passage communicated from the branched portion A inside the flange member 220 shown in FIG. 2 to the first communication passage 110 via the first discharge port H1. A fourth exhaust passage (bypass exhaust passage) 34 shown in FIG. 1 is formed by a path communicating with the second communication passage 120 from the branched portion A inside the flange member 220 shown in FIG. 2 through the second discharge port H2. Be done.

  FIG. 3 is a view of the auxiliary member 225 in the direction from the insertion surface S1 side of the flange member 220 toward the contact surface S2. In the auxiliary member 225, two through holes forming the above-mentioned first discharge port H1 and second discharge port H2 respectively, and a plurality of (four in the example shown in FIG. 3) bolt holes b1 for passing the bolts 90. And are provided. The first discharge port H1 is positioned inside the valve body 41 of the exhaust gas switching valve 40 when the exhaust gas switching valve 40 is in the closed state. That is, the valve body 41 of the exhaust gas switching valve 40 closes the first discharge port H1 by coming into contact with the periphery of the first discharge port H1 in the closed state.

  FIG. 4 is a view of the flange member 220 (flange main body 221 and auxiliary member 225) in the direction from the insertion surface S1 side of the flange member 220 toward the contact surface S2. The flange main body 221 is provided with one through hole forming an insertion port H3 into which the exhaust pipe 210 is inserted, and a plurality of (four in the example shown in FIG. 4) bolt holes b2 for passing the bolts 90. .

  When the flange member 220 is viewed from the insertion surface S1 side of the flange member 220 in the direction toward the contact surface S2, the first discharge port H1 and the second discharge port H2 of the auxiliary member 225 are as shown in FIG. It is located inside the insertion opening H3 of the flange main body 221. Therefore, the thickness of the portion (hereinafter also referred to as "first portion") R1 inside the insertion port H3 of the flange member 220 and outside the first exhaust port H1 and the second exhaust port H2 (that is, the thickness of the auxiliary member 225) Is thinner than the thickness of an outer portion (hereinafter also referred to as "second portion") R2 of the insertion opening H3 (that is, the combined thickness of the flange main body 221 and the auxiliary member 225).

  As described above, the supercharging device 1 according to the present embodiment is formed by fastening the separately manufactured first member 100 and the second member 200 with a plurality of bolts 90. The second member 200 is provided with an exhaust pipe 210 and a flange member 220 for fastening the exhaust pipe 210 to the second member 200. The flange member 220 is not manufactured integrally with the exhaust pipe 210 by casting from the viewpoint of weight saving and improvement of the warm-up property of a catalyst device (not shown) for purifying exhaust gas, and separately from the exhaust pipe 210 After being manufactured, the exhaust pipe 210 is welded to the exhaust pipe 210 in a state of being inserted into the insertion port H3.

  Further, in the present embodiment, an insertion port H3 communicating with the exhaust pipe 210, and a first discharge port H1 and a second discharge port respectively communicating with the first communication passage 110 and the second communication passage 120 of the first member 100. H 2 communicates with the inside of the flange member 220. This eliminates the need for providing the branch portion in the exhaust pipe 210, so that the exhaust pipe 210 can be prevented from increasing in size. This point will be described in more detail with reference to FIG.

  FIG. 7 is a view showing an example of the configuration of the supercharging device in the case of providing a branch portion in the exhaust pipe of the second member as a comparative example to the present embodiment. In addition, the supercharging apparatus shown to the comparative example of FIG. 7 is also formed by fastening with a volt | bolt the 1st member and 2nd member which were produced separately. Further, the flange member in the second member is also manufactured separately from the exhaust pipe and welded to the exhaust pipe from the viewpoint of weight reduction and improvement of exhaust catalyst warm-up property.

  However, in the supercharger shown in the comparative example of FIG. 7, the branch portion is provided in the exhaust pipe, and a plurality (two) of branch exhaust pipes are formed at the end of the exhaust pipe. Therefore, it is necessary to bend the exhaust pipe to form a plurality of branch exhaust pipes so as to be insertable into the flange member, and a so-called bending radius (see “a” in FIG. 7) is formed at that time. . Furthermore, the thickness of the exhaust pipe required to form the wall surface of the branch exhaust pipe is equivalent to two sheets (see “b” in FIG. 7). Furthermore, a thickness (see "c" in FIG. 7) is required to ensure the sealing performance in the entire flange member. As a result, the exhaust pipe has a complicated shape and becomes large, which leads to the enlargement of the supercharging device.

  On the other hand, in the supercharging device 1 according to the present embodiment, as shown in FIG. 2, the branch portion A is formed inside the flange member 220. Therefore, the exhaust gas from the exhaust pipe 210 is supplied from the insertion port H3 to the inside of the flange member 220, and then branched at the branching portion A inside the flange member 220, and the first communication passage 110 of the first member 100 and the first communication passage 110 The two communication passages 120 are respectively supplied. This eliminates the need to provide the exhaust pipe 210 with a branch. Therefore, the bending radius "a" shown in FIG. 7 becomes unnecessary. Thereby, the enlargement of the exhaust pipe 210 is suppressed as compared with the comparative example of FIG. 7.

  Further, in the supercharging device 1 according to the present embodiment, the auxiliary member 225 also functions as a part of the wall surface of the branch path from the branch portion A to the first outlet H1, so the wall surface of the branch exhaust pipe is formed. The thickness of the exhaust pipe 210 required to do so is reduced to one. Therefore, the enlargement of the exhaust pipe 210 is suppressed as compared with the comparative example (see “b” in FIG. 7) in FIG. 7 where the thickness for two sheets is required.

  Furthermore, in the supercharging device 1 according to the present embodiment, when the flange member 220 is viewed from the insertion surface S1 side of the flange member 220 toward the contact surface S2, the first discharge port H1 of the auxiliary member 225 and The second discharge port H2 is located inside the insertion port H3 of the flange main body 221, as shown in FIG. Thus, the flange member 220 is formed by a simple method in which the flange main body 221 in which the insertion port H3 is formed and the auxiliary member 225 in which the first discharge port H1 and the second discharge port H2 are formed. Can. That is, in the present embodiment, the branch portion A is formed inside the flange member 220 by making the thickness of the first portion R1 of the flange member 220 thinner than the thickness of the second portion R2. Such a difference in thickness can be formed by the difference between the thickness of the auxiliary member 225 and the combined thickness of the flange main body 221 and the auxiliary member 225.

  Furthermore, in the supercharging device 1 according to the present embodiment, the exhaust switching valve 40 is provided inside the end (opening) of the second communication passage 120 of the first member 100. The valve body 41 of the exhaust gas switching valve 40 contacts the periphery of the first discharge port H1 formed on the contact surface S2 of the flange member 220 (auxiliary member 225) of the second member 200 in the closed state. The outlet H1 is closed. As a result, while providing the exhaust gas switching valve 40 in the first member 100, a member in contact with the valve body 41 of the exhaust gas switching valve 40 can be formed by the flange member 220 of the second member 200.

<Modification>
In the embodiment described above, the thickness of the first portion R1 in the flange member 220 is thinner than the thickness of the second portion R2 by overlapping the flange main body 221 with another member (auxiliary member 225).

  On the other hand, in the present modification, the thickness of the first portion R1 in the flange member 220 is thinner than the thickness of the second portion R2 by forming the first portion R1 in the flange member 220a by cutting or casting. Do.

  FIG. 5 is a view showing a cross-sectional structure in the vicinity of the branch portion A of the supercharging device 1a according to the present modification. The supercharging device 1 a is formed by fastening the first member 100 and the second member 200 a with a plurality of bolts 90. In addition, since the structure of the 1st member 100 is the same as what was demonstrated in the above-mentioned embodiment, detailed description is not repeated here.

  The second member 200a includes an exhaust pipe 210 and a flange member 220a. In addition, since the structure of the exhaust pipe 210 is the same as what was demonstrated in the above-mentioned embodiment, detailed description is not repeated here.

  The flange member 220a has a first exhaust passage communicating with the first communication passage 110 and the second communication passage 120 of the first member 100, and the insertion surface S1 in which the insertion port H3a into which the end of the exhaust pipe 210 is inserted is formed. It has an abutment surface S2 on which the outlet H1a and the second outlet H2a are formed. The first outlet H1a and the second outlet H2a are respectively formed by holes penetrating the flange member 220a. The insertion port H3a is formed by cutting or casting.

  FIG. 6 is a view of the flange member 220a in the direction from the insertion surface S1 side of the flange member 220a toward the contact surface S2. The flange member 220a is provided with two through holes respectively forming the first discharge port H1a and the second discharge port H2a, and a plurality of bolt holes b for passing the bolts 90 therethrough.

  Furthermore, the first portion R1 of the flange member 220a (the inner portion of the insertion opening H3a and the outer portion of the first discharge opening H1a and the second discharge opening H2a) It is formed thinner than the thickness of 2 part R2. Thereby, the insertion port H3a is formed.

  The remaining structure of flange member 220a is the same as that of flange member 220 according to the above-described embodiment, and therefore, detailed description thereof will not be repeated.

  As described above, in the present modification, by forming the first portion R1 in the flange member 220a by cutting or casting, the thickness of the first portion R1 in the flange member 220 is greater than the thickness of the second portion R2 make it thin. Thereby, flange member 220a can be formed, without newly providing another member (auxiliary member 225 of Drawing 1).

  It should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present disclosure is indicated not by the above description but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

  1, 1a supercharger, 10 first turbocharger, 11, 13, 21, 23 scroll passage, 12, 22 turbine impeller, 14, 24 compressor impeller, 15, 25 shaft, 20 second turbocharger, 30 exhaust Passage 31 first exhaust passage 32 second exhaust passage 33 third exhaust passage 34 fourth exhaust passage 35 fifth exhaust passage 40 exhaust switching valve 41 valve body 42 support shaft 43 arm 50 intake Passage, 51 first intake passage, 52 second intake passage, 53 third intake passage, 54 fourth intake passage, 55 fifth intake passage, 60 intake switching valve, 90 bolt, 100 first member, 110 first communication passage , 120 second communication passage, 130, 220, 220a flange member, 200, 200a second member, 210 exhaust pipe, 221 flange main body, 225 auxiliary member, 5 0 engine, C1, C2 compressor, H1, H1a first outlet, H2, H2a second outlet, H3, H3a insertion slot, S1 insertion surface, S2 abutment surface, T1, T2 turbine, b, b1, b2 Bolt holes.

Claims (4)

A supercharger comprising a plurality of superchargers, wherein
A first member in which a plurality of communication paths respectively communicating with the plurality of turbochargers are formed;
And a second member fastened to the first member,
The second member is
An exhaust pipe to which exhaust gas from the engine is supplied;
And a flange member for fastening the exhaust pipe to the first member,
The flange member is
An insertion surface formed with an insertion opening into which the exhaust pipe is inserted;
And a contact surface which is in contact with the first member and in which a plurality of discharge ports are formed respectively communicating with the plurality of communication paths of the first member,
A supercharging device, wherein the insertion port in the insertion surface and the plurality of discharge ports in the contact surface communicate with each other in the inside of the flange member. When the flange member is viewed from the insertion surface side in a direction toward the contact surface, the plurality of discharge ports are located inside the insertion port,
2. The supercharging device according to claim 1, wherein a thickness of an inner part of the insertion opening in the flange member and an outer part of the plurality of discharge openings is thinner than a thickness of an outer part of the insertion opening in the flange member. .   The supercharger according to claim 1 or 2, wherein the flange member is formed by overlapping a flange body in which the insertion port is formed and an auxiliary member in which the plurality of discharge ports are formed. The first member further includes an open / close valve provided in any one of the plurality of communication paths,
In the closed state, the on-off valve closes the discharge port by contacting around one discharge port of any one of the plurality of discharge ports formed on the contact surface of the flange member. The supercharging apparatus according to any one of claims 1 to 3.

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