张腾1,2，贾红杰1，韩文涛1*，王林波1，王磊1，刘近报1
1.潍柴动力股份有限公司，山东潍坊261061；2. 潍柴西港新能源动力有限公司，山东潍坊261061
摘要：分析天然气发动机尾气中污染物控制方法，对比天然气发动机满足国六排放标准不同排放技术方案的优缺点，确定理论空燃比-三元催化-废气再循环技术方案是当前天然气发动机排放的最优技术方案。通过发动机台架进行冷、热态全球统一态测试循环（world harmoized transient cycle,WHTC)排放试验以及实际道路排放测试进行验证，结果表明使用该技术方案的天然气发动机污染物排放量满足国六排放标准的限值要求。
关键词：天然气发动机；国六排放标准；WHTC;技术方案
Abstract:The control methods of pollutants in the exhaust gas of natural gas engine are analyzed, the advantages and disadvantages of different emission technical routes for natural gas engines meeting the CHINA VI emission regulations are compared, then the current optimal technical route of natural gas engines is obtained: theoretical airfuel ratio +EGR+TWC. The hot and cold WHTC emission test and the real road driven emission are carried out. The results show that the emission of pollutants in this route can meet the requirements of CHINA VI emission regulation.
Keywords:natural gas engine; CHINA VI emission standards; emission technology
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