SUPERCHARGER FOR ENGINE
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United States of America Patent
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Issued Date -
Jun 23, 2016
app pub date -
Nov 30, 2015
filing date -
Nov 30, 2015
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Abstract
A supercharger pressurizes intake air for an engine. The supercharger includes a centrifugal impeller and an impeller housing covering the impeller. The impeller housing has a spiral chamber which forms a discharge passage for air compressed by the impeller; and a diffuser chamber defined downstream of the spiral chamber. A portion of an inner surface of the diffuser chamber is ground such that a ground region has a surface roughness less than that of a non-ground region.
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