公开(公告)号：US5937637A

公开(公告)日：1999-08-17

申请号：US675963

申请日：1996-07-05

申请人： Masakatsu Fujishita ,  Takeshi Atago ,  Akio Honji ,  Osamu Kuroda ,  Toshio Ogawa ,  Noriko Watanabe ,  Minoru Osuga

发明人： Masakatsu Fujishita ,  Takeshi Atago ,  Akio Honji ,  Osamu Kuroda ,  Toshio Ogawa ,  Noriko Watanabe ,  Minoru Osuga

IPC分类号： F01N3/02 ,  F01N3/08 ,  F01N3/20 ,  F01N3/22 ,  F01N3/24 ,  F01N9/00 ,  F01N13/02 ,  F01N13/04 ,  F02M25/07 ,  F01N3/00

CPC分类号： F01N3/0835 ,  F01N13/009 ,  F01N13/011 ,  F01N3/0814 ,  F01N3/0871 ,  F01N3/0878 ,  F01N3/2093 ,  F01N2240/02 ,  F01N2240/18 ,  F01N2250/12 ,  F01N2410/12 ,  F01N3/20 ,  F02M26/15

摘要： A system for purifying an exhaust gas for use in an automobile is disclosed which does not externally discharge unburnt hydrocarbons until a catalyst becomes active. An adsorbent is provided upstream of the catalyst. A heat exchanger is disposed between an upstream portion of the adsorbent and a portion between the adsorbent and the catalyst for controlling the elevation of the temperature of the adsorbent and for promoting the elevation of the temperature of the catalyst. The unburnt hydrocarbons are absorbed by the adsorbent 4 in the initial period of time from starting of an engine until the catalyst 8 becomes active. Temperature control is made in such a manner that the unburnt hydrocarbons which are adsorbed by the adsorbent 4 begins to be desorbed therefrom substantially simultaneously with the time when the catalyst 8 begins to function. A large quantity of unburnt hydrocarbons which are emitted from an engine immediately after the starting of the engine are prevented from being externally discharged without being treated.

摘要翻译： 公开了一种用于净化汽车中使用的废气的系统，其在外界不排出未燃烧的烃，直到催化剂变得活跃。 在催化剂的上游设置吸附剂。 吸附剂的上游部分和吸附剂和催化剂之间的部分设置有热交换器，用于控制吸附剂的温度升高并促进催化剂的温度升高。 在发动机起动至催化剂8变为活性的初始时间段内，未燃烧的烃被吸附剂4吸收。 以这样的方式进行温度控制，即当催化剂8开始起作用时，被吸附剂4吸附的未燃烧的碳氢化合物基本上同时脱附。 在发动机起动之后立即从发动机排出的大量未燃烧的碳氢化合物被防止被外部排出而不被处理。