天然气发动机动力性恢复研究

通过控制装置转换两用燃料来恢复发动机的动力性。在对两种燃料进行了性能对比试验后，分析并确定了转换点对应的节气门开度。然后进行燃料转换试验。研究结果表明：天然气汽油转换发动机运转稳定，最佳的转换位置是50％节气门开度。开度低于50％时，发动机燃用天然气；高于50％后，燃用汽油以恢复动力性要求。转换前后发动机排放分别接近燃用天然气和汽油的排放量。

Study of Convertion Performance on Natural Gas- gasoline Engine

Convertion is done with control equipment on a gasoline engine. Performance comparison between gasoline and naturalgas is made and valve opening degree of convertion is confirmed. Then the convertion experiment is carried. Results indicate: en-gine works without problems. Valve opening degree of convertion is 50%. When it is lower than 50%, natural gas is used andwhen it is higher than 50%, gasoline is provided to assure the high load. Emssion of convertion experiment lies between naturalgas and gasoline.