Abstract: A turbine housing assembly includes a plurality of constituent members connected to one another and easily manufactured. The turbine housing assembly includes a scroll part, an annular lid part, an exhaust gas outlet and a connection part connectable to a bearing housing for a turbine shaft. The scroll part and the connection part are each formed of a single piece of sheet metal and each is welded to the annular lid part that is orthogonal to a turbine axial direction so that the scroll part and the connection part are connected to each other via the annular lid part. Such a turbine housing assembly is of reduced weight, is quite easy to manufacture, of reduced cost, and can be made, at least in part, of materials having lower heat capacity as compared to conventional turbine housings made of sheet metal.

Abstract: An object is to provide a turbine housing assembly in which reduction of weight, facilitation of manufacture, cost-cutting, and reduction of heat capacity are further promoted compared to a conventional turbine housing made of sheet metal. A turbine housing assembly includes a plurality of constituent members connected to one another to constitute a turbine housing into which a turbine wheel is inserted. The turbine housing assembly at least includes a scroll part 2 and an exhaust part 8 of a tubular shape having a separate body separate from the scroll part 2. The scroll part 2 is formed by processing a single piece of sheet metal so that, on a back face side of a bottom face part 22 of the scroll part 2, a recess portion 22b on which a through-hole of an exhaust gas outlet 2B is formed and a projecting portion 22a formed by a bottom surface of an exhaust gas flow path 2A projecting toward the back face side are formed, the projecting portion 22a surrounding the recess portion 22b.

Abstract: An object is to provide a turbine housing assembly in which reduction of weight, facilitation of manufacture, cost-cutting, and reduction of heat capacity are further promoted compared to a conventional turbine housing made of sheet metal. A turbine housing assembly includes a plurality of constituent members connected to one another to constitute a turbine housing into which a turbine wheel is inserted.

Abstract: An object is to provide a turbine housing assembly in which reduction of weight, facilitation of manufacture, cost-cutting, and reduction of heat capacity are further promoted compared to a conventional turbine housing made of sheet metal. A turbine housing assembly includes a plurality of constituent members connected to one another to constitute a turbine housing into which a turbine wheel is inserted. The turbine housing assembly at least includes a scroll part 2 and an exhaust part 8 of a tubular shape having a separate body separate from the scroll part 2. The scroll part 2 is formed by processing a single piece of sheet metal so that, on a back face side of a bottom face part 22 of the scroll part 2, a recess portion 22b on which a through-hole of an exhaust gas outlet 2B is formed and a projecting portion 22a formed by a bottom surface of an exhaust gas flow path 2A projecting toward the back face side are formed, the projecting portion 22a surrounding the recess portion 22b.