US Patent 11174868 Turbocharger

A turbocharger includes a bearing housing, a turbine housing, a turbine chamber formed in the turbine housing, a turbine impeller rotating integrally with the impeller shaft by the exhaust gas flowing into the turbine chamber, a turbine scroll passage formed in the turbine housing, a communication passage, and a bearing housing side plate made of sheet metal and forming wall surfaces of the turbine scroll passage and the communication passage on the bearing housing side. The bearing housing side plate has an inner peripheral part of the bearing housing side plate is a stationary part relative to the bearing housing, and an outer peripheral end portion of the bearing housing side plate is a free end. The bearing housing side plate has an outer peripheral side surface of the bearing housing side plate is spaced from a first facing member that faces the outer peripheral wall side surface.