Exhaust system component

Abstract

An exhaust system component includes a plurality of branch pipe parts, a collecting pipe part, a first shell member, a second shell member, and a supporting part. The supporting part is formed integrally with one of the first shell member and the second shell member, such that a region surrounded by peripheries of the plurality of branch pipe parts and the collecting pipe part, and a part of a periphery of the supporting part is open to form an opening portion.

1 . An exhaust system component that as a whole constitutes a flow path for guiding exhaust gas from an internal combustion engine having a plurality of cylinders, the exhaust system component comprising:
 a plurality of branch pipe parts that constitute respectively a plurality of flow paths for guiding the exhaust gas from the internal combustion engine;   a collecting pipe part that collects the plurality of branch pipe parts to guide exhaust gas from the plurality of branch pipe parts, to the air or to a different exhaust system component that is different from the exhaust system component and that is located at a downstream side;   a first shell member that integrally constitutes a part of an outer shell forming, in each of the plurality of branch pipe parts, a flow path from the internal combustion engine to the collecting pipe part, and a part of an outer shell forming, in the collecting pipe part, a flow path from each of the plurality of branch pipe parts to the air or to the different exhaust system component that is different from the exhaust system component and that is located at the downstream side;   a second shell member that constitutes a part of the outer shell forming, in each of the plurality of branch pipe parts, the flow path from the internal combustion engine to the collecting pipe part, and a part of the outer shell forming, in the collecting pipe part, the flow path from each of the plurality of branch pipe parts to the air or to the different exhaust system component that is different from the exhaust system component and that is located at the downstream side,
 the second shell member being formed separately from the first shell member, and 
 the second shell member having a concave portion that forms flow paths in the plurality of branch pipe parts and a flow path in the collecting pipe part when the second shell member is joined to the first shell member; and 
   a supporting part that connects two branch pipe parts adjacent to each other among the plurality of branch pipe parts,   wherein the supporting part is integrally formed with one of the first shell member and the second shell member, such that a region surrounded by peripheries of the two branch pipe parts and the collecting pipe part and by a part of a periphery of the supporting part is open to form an opening portion.   
     
     
         2 . The exhaust system component according to  claim 1 , further comprising at least one of: a plurality of the first shell members; and a plurality of the second shell members. 
     
     
         3 . The exhaust system component according to  claim 1 .
 wherein each of the plurality of branch pipe parts is bent in a same direction and formed in a tubular shape,   wherein the exhaust system component includes a flange part in a plate-like shape to be connected to the internal combustion engine, the flange part having:
 a plurality of connection holes that respectively connects the plurality of branch pipe parts respectively to a plurality of exhaust ports of the internal combustion engine; and 
 at least one insertion hole, into which a fastening component is inserted to a position away from the connection holes along a direction of the bending of each of the plurality of branch pipe parts, 
   wherein the supporting part is formed such that the opening of the opening portion is formed along the direction of the bending of the plurality of branch pipe parts connected to the flange part, and the supporting part is formed at a position where the opening of the opening portion encloses a region around an axis as a center, the axis orthogonal to an outer surface of the flange part and extending from a center of the insertion hole.   
     
     
         4 . The exhaust system component according to  claim 1 ,
 wherein the exhaust system component is an exhaust manifold.   
     
     
         5 . The exhaust system component according to  claim 1 ,
 wherein the exhaust system component is a merging member that merges a plurality of exhaust pipes into one exhaust pipe.   
     
     
         6 . The exhaust system component according to  claim 1 ,
 wherein the opening portion is formed such that the opening of the opening portion includes a region enabling a tool for fastening a fastening component to pass therethrough.   
     
     
         7 . The exhaust system component according to  claim 1 ,
 wherein the supporting part is a section formed in a plate-like shape.