轿车用CNG/汽油双燃料系统开发及其排放特性试验研究  

Development of CNG/Gasoline Dual-Fuel System for Passenger Car and Experimental Study on Its Emission Characteristics

作　　者：张文[1,2] 李志军[1] 刘磊[1] 焦鹏昊[1] 张瀛[1] 

机构地区：[1]天津大学,内燃机燃烧学国家重点实验室,天津300072 [2]天津电子信息职业技术学院,天津300350

出　　处：《汽车工程》2013年第6期477-481,共5页Automotive Engineering

基　　金：国家863计划(2008AA06Z322);国家自然科学基金(51276128,50776062);天津市自然科学重点基金(11JCZDJC23200)资助

摘　　要：研制了CNG/汽油双燃料系统,该系统采用附加CNG供给装置,结合电子控制技术,实现CNG/汽油的双燃料工作模式。依据GB18352.3—2005的试验运转循环工况,在转鼓试验台上对汽油机燃用CNG的排放污染物进行测试。结果表明:燃用CNG时,CO、THC排放降低而NOx排放增加;调大点火提前角会使CO进一步下降,NOx排放更加上升,而THC则有所回升。A CNG/gasoline dual-fuel system is developed,which uses additional CNG supply device combined with electronic control technology to realize CNG/gasoline dual-fuel operation mode.An emission test is conducted on chassis dynamometer with a driving cycle defined in GB18352.3-2005.The results show that when the engine is fueled with CNG,the emissions of CO and THC reduce while NOx emission increases,and the adjustment for more advanced ignition timing may further lower CO emission and raise NOx emission with THC emission rising back.

关 键 词：压缩天然气 汽油机 电控系统 排放特性 

分 类 号：U464.173[机械工程—车辆工程] U467[交通运输工程—载运工具运用工程]