Guide vane cage for variable turbine/compressor structure of supercharger used in internal combustion engine of motor car, has inner ring that is set in attachment region of arms and recess that is formed in axial groove portion

摘要

The cage (1) has an inner ring (2) and an axial outer ring (3) that are arranged over two arms (4). The inner ring is provided in the attachment region of arms. A recess (5) is formed in an axial groove portion. The surface of main portion is coated with nitride.