Patent ID: 9708932
Date: 2017-07-18
CPC Classifications: F01D,F05D

Claim:
1. A turbine housing assembly including a plurality of constituent members connected to one another to constitute a turbine housing into which a turbine wheel rotated by exhaust gas introduced from an engine is inserted, the turbine housing assembly at least comprising: a scroll part of a bottomed cylindrical shape that has a surrounding wall part and a bottom face part, the scroll part including: an exhaust part of a tubular shape comprising a separate body separate from the scroll part, the scroll part being formed by processing a single piece of sheet metal so that, on a back face side of the bottom face part of the scroll part, a recess portion through which the trough-hole of the exhaust gas outlet is formed and a projecting portion formed by a bottom surface of the exhaust gas flow path projecting toward the back face side are formed, the projecting portion surrounding the recess portion, and the recess portion of the scroll part being connected to an axial end surface of an end portion of the exhaust part in a turbine axial direction so that only the axial end surface of the exhaust part is in contact with the scroll part when the exhaust part is in communication with the exhaust gas outlet of the scroll part in a state where the exhaust part is not in contact with the projecting portion of the scroll part and a gap is formed between an outer circumferential face of the exhaust part and the projecting portion of the scroll part.