摘要
将柴油机改造为点燃式单点集中喷射预混天然气发动机。该发动机采用无废气再循环EGR的当量比燃烧+三元催化器的技术路线,通过匹配增压器、三元催化器和电控系统的优化标定,按全球统一瞬态循环WHTC进行排放试验。结果表明,所开发的国六天然气发动机动力性和燃料经济性达到设计指标,排放满足GB17691—2018《重型柴油车污染物排放限值及测量方法(中国第六阶段)》的要求。
In this paper,a diesel engine was transformed into a natural-gas-premixed engine with singlepoint injection.The engine adopted the technical route of the equivalence-ratio combustion without exhaust gas recirculation(EGR)plus the three-way catalytic converter.By matching the optimized calibrations of the supercharger,the three-way catalytic converter and the electronic control system,the emission test was carried out according to the world harmonized transient cycle(WHTC).The results show that the dynamic performance and fuel economy of the developed China VI natural gas engine meet the design targets,and the emissions meet the requirements of GB17691—2018 Limits and Measurement Methods for emissions from diesel-fueled heavy-duty Vehicles(China VI).
作者
陈本林
袁卫波
王舒
王国华
CHEN Benlin;YUAN Weibo;WANG Shu;WANG Guohua(Chongqing CAERI Power Technology Co.,Ltd.,Chongqing 401122,China;China Automobile Engineering Research Institute,Chongqing 401122,China)
出处
《汽车工程学报》
2021年第1期47-52,71,共7页
Chinese Journal of Automotive Engineering
基金
重庆市科学技术委员会重点产业共性关键技术创新专项(cstc2017zdcy-zdyfX0097)。
关键词
天然气发动机
排放
三元催化器
当量比燃烧制
natural gas engine
emissions
three way catalyst
stoichiometric operation
