Gas sampling method and dilution tunnel therefor
    1.
    发明授权
    Gas sampling method and dilution tunnel therefor 失效
    气体采样方法和稀释隧道

    公开(公告)号:US5410907A

    公开(公告)日:1995-05-02

    申请号:US111843

    申请日:1993-08-25

    IPC分类号: F02M17/04 G01N1/22 G01N33/00

    摘要: Emission gasses from an engine exhaust pipe are collected through an inlet of a dilution tunnel which is an elongated, hollow tube. The inlet is spaced from the exhaust pipe to also admit surrounding air. The air and emissions are mixed in the tunnel by a screen in the tunnel. A probe in the tunnel diverts a portion of the mixture to gas analyzers. Prior to analysis the mixture may be condensed, filtered or otherwise processed.

    摘要翻译: 来自发动机排气管的排放气体通过作为细长的中空管的稀释通道的入口收集。 入口与排气管间隔开,同时也允许进入周围的空气。 空气和排放物通过隧道中的屏幕在隧道中混合。 隧道中的探头将一部分混合物转移到气体分析仪中。 在分析之前,可以将混合物冷凝,过滤或以其它方式处理。

    Gas sampling method and dilution tunnel therefor
    2.
    发明授权
    Gas sampling method and dilution tunnel therefor 失效
    气体采样方法和稀释隧道

    公开(公告)号:US5450749A

    公开(公告)日:1995-09-19

    申请号:US219672

    申请日:1994-03-28

    摘要: Emission gasses from an engine exhaust pipe are collected through an inlet of a dilution tunnel which is an elongated, hollow tube. The inlet is spaced from the exhaust pipe to also admit surrounding air. Ambient air and emissions are mixed in the tunnel by a screen in the tunnel. A probe in the tunnel diverts a portion of the mixture to gas analyzers. Prior to analysis the mixture may be condensed, filtered or otherwise processed. The analysis determines a CO/CO.sub.2 ratio which is used to determine the air/fuel ratio in the engine based on characteristics of the fuel. The air/fuel mixture of the engine is then adjusted to achieve desired performance.

    摘要翻译: 来自发动机排气管的排放气体通过作为细长的中空管的稀释通道的入口收集。 入口与排气管间隔开,同时也允许进入周围的空气。 环境空气和排放物通过隧道中的屏幕在隧道中混合。 隧道中的探头将一部分混合物转移到气体分析仪中。 在分析之前,可以将混合物冷凝,过滤或以其它方式处理。 该分析确定用于基于燃料的特性来确定发动机中的空气/燃料比的CO / CO 2比。 然后调整发动机的空气/燃料混合物以实现期望的性能。