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| | On the basis of experiments the paper investigates the mechanism of improving the engine performance by eletronic control fuel injection. The results of the study show that the optimization of air fuel ratio and the improvement of mixing condition outside the cylirder are the main factors. Temperature compensation is also necessary for gasoline engine, especially at low load. In addition, the eliclosed and plessurized fuel supply can reduce the HC emission. | | 首先介绍了单点和多点电控汽油喷射发动机,阐述其工作原理以及各工况下的控制方式,并对各自的特点作了介绍;然后,根据试验,从理论上深入地研究了电控汽油喷射改善发动机性能的机理。研究表明:空燃比的优化和气缸外混合条件的改善是采用电控汽油喷射改善发动机性能的主要因素;温度补偿对汽油机是必要的,尤其在小负荷下,它既可解决低温运转稳定性,又可在正常温度下实现较稀混合气燃烧。此外,密封压力供油可降低HC排放。 | | 文摘来源 | | The atomizing characteristics of gasoline injector with use of the double-pulsed in-line Fraunhofer holography system have been studied. This paper presents the holography system and the control system of fuel injection. These systems have been used to examine and analyze both GM and Bosch injectors. The abnormal phenomena such as drifting, dripping, and unconlinuous injection can also be found.This system is proved experimentally to be very useful for evaluating microscopic qualities of fuel atomization wh... | | 利用激光全息技术对电控多点汽油喷嘴的喷雾特性进行了研究。介绍了用于汽油喷雾场研究的双脉冲激光全息摄影装置以及喷油和触发的控制系统,使用该系统研究了GM和BOSCH公司生产的两种不同型号喷嘴的喷雾特性,同时发现了漂流、滴油及断续喷射等不正常喷射。实验表明,该系统能有效地评定电控喷嘴的微观性能,为电控汽油喷射发动机改善性能提供依据。 | | 文摘来源 | | In this paper, the timing relation between ignition and injection signals in an electronic-controlled fuel injected SI engine were analysed detailly.The method of generating these control signals with double channels of programming interval timer were presented. The precision and advantages of the method were evaluated. | | 详细分析了电控汽油喷射发动机中点火线圈控制信号与喷油器控制信号的定时关系,提出采用双可编程定时/计数器联动产生控制信号的方法,并对这种方法的控制精度及其优缺点给予分析与评价。 | | 文摘来源 | |   | | << 更多相关文摘 |
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