汽油机节能技术——燃油直喷技术(GDI)
技术 2019-05-20 18:00:02 字数:1314

汽油机节能技术——燃油直喷技术(GDI)

GDI技术,是指将高压油泵提高压力后的汽油,通过高压油轨和喷油器直接喷入缸内(与柴油发动机的喷油方式极为类似),缸内汽油充分雾化,并和空气按最优化的模式进行混合,大大增强发动机的抗爆燃性,且提高燃烧热效率,从而使发动机在获得更高动力性的同时达到更好的节能效果。GDI技术一般可使发动机的功率达到同排量非直喷发动机的1.5~1.7倍,燃油效率提高10%~20%。

近年来,各国都加大了对GDI技术的研究,各大汽车公司相继开发出不同的汽油直喷技术。

我国汽油机缸内直喷技术的研发也取得了一定的成绩。国家“863”计划中的“汽车开发先进技术”重点支持了以下公司的缸内直喷技术研发:奇瑞的轿车直喷汽油机开发、一汽的轿车直喷汽油机研究开发、吉利的轿车直喷汽油机技术开发。这三家企业到目前为止都取得了一定成果。在2006北京国际车展上,奇瑞展出了5款均采用了GDI技术的ACTECO系列发动机。2007年我国自主研发的汽油直喷发动机JB8在长春一汽技术中心正式点火启动运转。2008北京车展上,长城展示了1.5L的GW4G15-GDI增压直喷汽油机、吉利展出了缸内直喷汽油机。

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