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A charge air system for an internal combustion engine includes a compressor wheel which is rotated to draw ambient air into a housing, compress the air, and to force the air through a discharge conduit into the the intake manifold of an internal combustion engine. The silencers may be placed in the

A charge air system for an internal combustion engine includes a compressor wheel which is rotated to draw ambient air into a housing, compress the air, and to force the air through a discharge conduit into the the intake manifold of an internal combustion engine. The silencers may be placed in the inlet conduit or the outlet conduit to attenuate pressure fluctuations in the conduits, which are a source of significant noise.

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Charge air system for an internal combustion engine, said engine including an intake manifold and an exhaust manifold, said system including a housing having an inlet and an outlet, a rotating compressor wheel within said housing for drawing air through the inlet, compressing the air drawn through t

Charge air system for an internal combustion engine, said engine including an intake manifold and an exhaust manifold, said system including a housing having an inlet and an outlet, a rotating compressor wheel within said housing for drawing air through the inlet, compressing the air drawn through the inlet, and ejecting the compressed air through the outlet, an inlet conduit connected to said inlet for communicating air to said inlet, an outlet conduit connected to said outlet and to said intake manifold for communicating compressed air from said outlet to said intake manifold, said compressor wheel being contoured to generate pressure fluctuations in at least one of said conduits during rotation of the compressor wheel, and pressure fluctuation attenuating means for attenuating said pressure fluctuations in at least one of said conduits to thereby reduce noise generated in a corresponding conduit by said pressure fluctuations.