稀燃车用催化剂的研究进展.pdf

第 36卷第 4期天津大学学报 N
2003年 7月 University Tianjin Journalof
稀燃汽油机 NO 排放控制的实验研究
王莉,刘德新,王天友,刘书亮,赵新顺
(,天津 300072;,天津 300072)
摘要:开发了一套适用于稀燃汽油机的电控节气门系统以配合 NO 吸附-
节气门开度以及点火提前角施以相应的特殊控制,以满足 NO 吸附-还原催化转化器的工作要求,同时保持输出功
NO 吸附-还原催化转化器配合三效催化转化器应用于丰田8A16气门EFI发动机进行稀燃匹配
实验,大大降低稀燃发动机的 NO 排放,NO 排放最低可达 50×10~,最高转化率达 91%
低,NO 排放越高,但其对 NO 排放总体影响不大;负荷对 NO 排放的影响较大,负荷越大,NO 排放越高.
关键词:稀薄燃烧;电控节气门;NO 吸附-还原;NO 排放
中图分类号:TK411,5 文献标识码:A 文章编号:0493-2137(2003)04-0456-04
Study on NO Reduction in Lean Burn Gasoline Engine
W ANG Li ,LIU De—xin ,W ,LIU Shu—liang ,ZHAO Xin—shun
( of Electrical and Automation Engineering,Tianjin300072,China;Automation andUniversity,Tianjin ( of
,China) CombustionLaboratory,TianjinEngine University,Tianjin
Abstract:To cooperate with the NO storage-reduction catalyst’S regenerative process,an electronic control
throttle systemthrottle suitableleanfor burn gasoline engine has bean control ofignition time and
throttle openingthrottle utilized is to obtain constant out~t power when NO storage—reduction catalyst is working.
W hilethe NO storage—reduction catalystand TWC are used on Toyota 8A 16 Valves EFI lean burn SI engine,
NO emissiondecreases lowestNO emissionabou