Patent ID: 7575411

Claim:
A compressor assembly, comprising: a compressor housing having a main air inlet, an annular wall defining an inducer bore, a secondary air inlet passage, wherein the secondary air inlet passage is in fluid communication with the main air inlet upstream of the inducer bore; the secondary air inlet passage being disposed around the inducer bore between an inner periphery of the compressor housing and the annular wall, the secondary air inlet passage having an outlet slot operatively intersecting the inducer bore at the compressor wheel to permit the entry of air thereinto, and an inlet slot in fluid communication with the secondary air inlet passage to permit the entry of air thereinto, the outlet slot defining an augmented inducer diameter region; and a compressor wheel disposed in the compressor housing, the compressor wheel having a first inducer periphery disposed within the inducer bore, the compressor wheel further having a stepped portion formed by at least one plurality of vanes and providing a larger inducer periphery than the inducer periphery within the inducer bore, the stepped portion being disposed in the augmented inducer diameter region of the housing adjacent to the outlet slot.