| 摘要 |
A turbocharger (12) for an internal combustion engine (36) has a compressor operable as single stage or multi-stage compressor. A first compressor stage includes a first compressor wheel (16) carried by a shaft (56), an axially extending first inlet (60) and a radially extending first outlet (62). A second compressor stage includes a second compressor wheel (20) carried by the shaft (56) and axially extending second inlet (64) and a radially extending second outlet (66). An interstage duct (68) fluidly connects in series the first outlet (62) of the first compressor with the second inlet (64) of the second compressor. The interstage duct (68) includes a bypass opening (72) includes in communication with an ambient environment. A valve (70) is positioned within the interstage duct (68). The valve (70) is moveable to and between a first position to close the interstage duct (68) while the bypass (72) stays open and a second position to close the bypass opening (72). <IMAGE> |
