CAJ | 학술논문

在一台增压直喷汽油机上,进行了不同调和比例正丁醇-汽油混合燃料的燃烧特性研究,特别针对高比例正丁醇-汽油混合燃料(丁醇体积分数为 40%,)进行燃烧特性研究.结果表明,在相同负荷下,与汽油和低比例正丁醇-汽油混合燃料(丁醇体积分数为 15%,)相比,高比例混合燃料的滞燃期和燃烧持续期缩短,缸内最大爆发压力和瞬时放热率峰值升高,同时主放热时刻提前,燃烧反应速度加快;此外,高比例正丁醇-汽油混合燃料的燃烧稳定性增强,但抗爆震能力减弱;尽管其燃油消耗率有所升高,但有效热效率得到改善.
재일태증압직분기유궤상,진행료불동조화비례정정순-기유혼합연료적연소특성연구,특별침대고비례정정순-기유혼합연료(정순체적분수위 40%,)진행연소특성연구.결과표명,재상동부하하,여기유화저비례정정순-기유혼합연료(정순체적분수위 15%,)상비,고비례혼합연료적체연기화연소지속기축단,항내최대폭발압력화순시방열솔봉치승고,동시주방열시각제전,연소반응속도가쾌;차외,고비례정정순-기유혼합연료적연소은정성증강,단항폭진능력감약;진관기연유소모솔유소승고,단유효열효솔득도개선.
Combustion characteristics of n-butanol-gasoline blend fuels with different blending ratio,especially gasoline blend fuel of high n-butanol ratio(40%, n-butanol volume fraction),were investigated on a turbocharged gasoline direct injection(GDI)engine.The results showed that under the same load,for gasoline blend fuel of high n-butanol ratio,its ignition was delayed and combustion duration shortened compared with pure gaosoline and gasoline blend fuel of low n-butanol ratio (15%, n-butanol volume fraction).The peaks of combustion pressure and heat re-lease rate were raised,the main heat release timing advanced and the burning rate increased.In addition,its com-bustion stability was improved,but the anti-knock ability was degraded.Although its brake specific fuel consumption was increased,the brake thermal efficiency was improved.