Hydrocarbon retaining and purging system
    19.
    发明授权
    Hydrocarbon retaining and purging system 有权
    烃保留和净化系统

    公开(公告)号:US08161733B2

    公开(公告)日:2012-04-24

    申请号:US12396782

    申请日:2009-03-03

    IPC分类号: F01N3/00

    摘要: Methods and systems are provided for operating an engine having a hydrocarbon retaining system and an emission control device coupled to an engine exhaust, the engine exhaust comprising a venturi. One example method comprises, during a storing condition, routing exhaust gas through the venturi without generating a venturi action, and then to the hydrocarbon retaining system, while bypassing the emission control device, to store hydrocarbons in the hydrocarbon retaining system, and during a purging condition, routing exhaust gas through the venturi while generating venturi action, then to the emission control device, and then to the hydrocarbon retaining system, to purge stored hydrocarbons, wherein a flow of purged hydrocarbons is drawn back to the venturi via venturi action.

    摘要翻译: 提供了用于操作具有碳氢化合物保持系统的发动机和耦合到发动机排气的排放控制装置的方法和系统,所述发动机排气包括文氏管。 一个示例性方法包括在储存条件期间,通过文丘里管排出废气而不产生文丘里管作用,然后在绕过排放控制装置的同时,将碳氢化合物储存在碳氢化合物保留系统中并在清洗期间 条件是,通过文丘里管排出废气,同时产生文氏管作用,然后排放到排放控制装置,然后到烃保留系统,以清除储存的碳氢化合物,其中通过文丘里作用将清除的烃流引导回文丘里管。