热冲击试验在天然气发动机开发中的应用研究  

Application Study of Thermal Shock Test in Development of Natural Gas Engine

作　　者：谭海亮 宋广迎 史学刚 崔海冰 Tan Hai-liang;Song Guang-ying;Shi Xue-gang;Cui Hai-bing(Weichai Westport New Energy Power,Shandong Weifang 261001;Weichai Power Co.,Ltd.,Shandong Weifang 261001)

机构地区：[1]潍柴西港新能源动力有限公司,山东潍坊261001 [2]潍柴动力股份有限公司,山东潍坊261001

出　　处：《内燃机与配件》2023年第22期6-8,共3页Internal Combustion Engine & Parts

摘　　要：国六天然气发动机技术路线大多采用理论空燃比+EGR路线。理论空燃比路线的采用,极大提高了发动机热负荷,并对发动机机体、缸盖、排气管、涡轮增压器等零部件的可靠性提出了极大的挑战。本文依据热冲击试验方法,通过控制发动机转速、节气门开度等参数,探讨了不同工况对发动机整机可靠性的影响;对产品设计进行了验证及改进,并对改进后的产品可靠性能进行再验证。为国六天然气发动机的开发提供参考。The stoichiometric-burn+EGR is adopted in most of the technical routes of natural gas engine.The adoption of the stoichiometric-burn route greatly improves the thermal load of the engine,and poses a great challenge to the reliability of engine body,cylinder head,exhaust pipe,supercharger and other components.Based on the thermal shock test method,the influence of different working conditions on the reliability of the engine is discussed by controlling engine speed,throttle opening and other parameters.The product design is verified,and the reliability of the improved product is re-verfied.It provides reference for the development of natural gas engine.

关 键 词：理论空燃比 热冲击 可靠性 

分 类 号：U464.113[机械工程—车辆工程]