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    • 3. 发明授权
    • Exhaust gas manifold
    • 排气歧管
    • US3581494A
    • 1971-06-01
    • US3581494D
    • 1970-01-02
    • ARVIN IND INC
    • SCHEITLIN GEORGE EZAGAR FRANK L
    • F01N3/26F01N13/10F01N3/00
    • F01N13/102F01N3/26
    • An exhaust gas manifold for an internal combustion engine in which there is provided an outer shell having a plurality of port runners for connection to said engine and an outlet for connection to an exhaust pipe. An inner shell is carried within the outer shell to receive the exhaust gases from the engine and increase their dwell time by providing adequate volume for oxidation to occur within the manifold prior to permitting said gases to discharge through the outer shell outlet. Said inner shell is formed from sheet metal and comprises a plurality of slidably interconnected chambers in open communication with each other and the outlet. Each of said chambers is provided with an inlet conduit carried within one of the port runners and disposed in sealing engagement therewith. A compressible insulation is interposed between said outer and inner shells for thermally insulating said outer shell from the exhaust gases passing through said inner shell, and for conserving the thermal energy of the exhaust gases.