Compressor of a turbocharger

  • US 4,382,747 A
  • Filed: 07/10/1980
  • Issued: 05/10/1983
  • Est. Priority Date: 04/01/1980
  • Status: Expired due to Term
First Claim
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1. A turbocharger comprising a center housing, a compressor housing fixed onto the center housing, an impeller arranged in the compressor housing, a scroll shaped air discharge chamber formed in the compressor housing around the impeller and having an inner wall defining the air discharge chamber therein, the inner wall of the air discharge chamber having a cylindrically axially extending inner wall portion which is positioned furthest from the impeller, and a radially extending vaneless diffuser arranged between the impeller and the air discharge chamber, the center housing having a first annular surface which radially extends from the vicinity of the impeller to said inner wall portion of the air discharge chamber, the compressor housing having a radially extending annular separating portion which separates the vaneless diffuser from the air discharge chamber, the annular separating portion having a second annular surface which is arranged parallel to the first annular surface and extends from the vicinity of the impeller to the vicinity of said inner wall portion of the air discharge chamber, the first annular surface and the second annular surface defining the vaneless diffuser therebetween, the first annular surface of the center housing having a concavely curved portion at a position near said inner wall portion of the air discharge chamber, the concavely curved portion gradually curving from the first annular surface towards said inner wall portion of the air discharge chamber, the center housing having a flange portion having the concavely curved portion and a cylindrically extending outer circumferential wall, said inner wall portion of the air discharge chamber having a cylindrically extending inner circumferential wall which is fitted onto the outer circumferential wall of the center housing.

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