发明授权
- 专利标题： Exhaust gas purifying method and exhaust gas purifying system
- 专利标题（中）： 废气净化方法和废气净化系统
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申请号： US10659252申请日： 2003-09-11
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公开(公告)号： US07115237B2公开(公告)日： 2006-10-03
- 发明人: Hitoshi Sato , Naofumi Ochi , Masashi Gabe , Takehito Imai
- 申请人： Hitoshi Sato , Naofumi Ochi , Masashi Gabe , Takehito Imai
- 申请人地址： JP Tokyo
- 专利权人： Isuzu Motors Limited
- 当前专利权人： Isuzu Motors Limited
- 当前专利权人地址： JP Tokyo
- 代理机构： Staas & Hasley LLP
- 优先权： JP2002-274750 20020920
- 主分类号： F01N3/08
- IPC分类号： F01N3/08 ; B01D53/94 ; B01D53/86 ; B01D53/04
摘要：
To provide an exhaust gas purifying method for purifying the exhaust gas of an internal combustion engine (1) by an exhaust gas purifying system (10) having an oxidation catalyst (3a), which comprises the steps of estimating the quantity of unburnt hydrocarbon accumulated in a support of the oxidation catalyst (3a), performing a hydrocarbon removal control when an estimated accumulation quantity (Vhc) of the unburnt hydrocarbon exceeds a predetermined judgment value (Vhc0) and raising an exhaust gas temperature (T) to activate the oxidation catalyst (3a) and oxidizing and removing the accumulated unburnt hydrocarbon.Thereby, it is possible to prevent a white fume from being produced after a low exhaust temperature state of an idling operation or the like continues for a long time.
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