【摘 要】
：
在汽油价格不断上涨及加气站数量相对较少的形势下,开发汽油/CNG两用燃料发动机具有重要意义.本文介绍了当前汽油/CNG两用燃料发动机的主流开发思路,同时以一款1.5L排量的四缸汽油/CNG两用燃料发动机的工程化开发实例,B发动机的工程化开发实例，说明以汽油机为基础开发汽油/CNG两用燃料发动机，在工程化上是可行的。虽然在CNG工况下发动机动力性水平会下降15％左右，但由于此种开发模式具有开发周期短
【机 构】
：
重庆长安汽车股份有限公司动力研究院 重庆长安汽车股份有限公司模具事业部
论文部分内容阅读
在汽油价格不断上涨及加气站数量相对较少的形势下,开发汽油/CNG两用燃料发动机具有重要意义.本文介绍了当前汽油/CNG两用燃料发动机的主流开发思路,同时以一款1.5L排量的四缸汽油/CNG两用燃料发动机的工程化开发实例,B发动机的工程化开发实例，说明以汽油机为基础开发汽油/CNG两用燃料发动机，在工程化上是可行的。虽然在CNG工况下发动机动力性水平会下降15％左右，但由于此种开发模式具有开发周期短、开发成本低等明显优势，在一段时期内仍将是汽油/CNG两用燃料发动机的主流开发模式。今后对于汽油/CNG两用燃料发动机的研究，应着重从提高CNG工况下发动机动力性这个方向入手，通过寻找适当的点火提前角、点火能量、点火间隙以及不同转速下的混合气浓度，最大程度地恢复发动机在天然气工况下的动力性能。
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