本文介绍的１Ｅ４０Ｍ型水冷汽油机是在ＤＫ－５０型风冷汽油机的基础上进行的结构改进设计。该机利用自然对流循环原理，成功地解决了风冷汽油机在配套使用中存在的低速高负荷工况下的过热现象及后备功率不足的缺点，同时对提高该机动力性及经济性指标所采取的技术措施进行了分析，取得了较好的效果 This article describes the 1E40M water-cooled gasoline engine in the DK-50 air-cooled gasoline engine based on the structural improvement of the design. The machine uses the natural convection cycle principle, successfully solved the air-cooled gasoline engine in the supporting the use of low speed and high load conditions exist overheating and shortcomings of lack of backup power, while improving the machine power and economic indicators taken The technical measures were analyzed, and achieved good results