Patent ID: 8826661

Claim:
A cooling structure of a supercharger having a turbine wheel rotated by exhaust gas from an engine, the cooling structure comprising: an inner heat insulating part including an air layer, wherein the inner heat insulating part surrounds a turbine housing that houses the turbine wheel; and an outer low temperature part surrounding the inner heat insulating part, wherein the outer low temperature part comprises a cover member and a coolant circulation passage formed within the cover member, wherein the cover member surrounds the turbine housing so as to define the outer low temperature part as surrounding the inner heat insulating part, and wherein the coolant circulation passage includes a coolant inlet adapted to feed coolant to the coolant circulation passage and includes a coolant outlet adapted to discharge coolant from the coolant circulation passage so that the coolant inlet and the coolant outlet are disposed adjacent to each other on an end surface of the cover member.