Developmental Research of Ultra High Pressure Fuel Injections System by Electro-Hydraurical Control

对超高压喷射喷雾器的喷射特性进行了评价，并测量了高压喷射系统在实验柴油机上的燃烧特性和废气排放。本研究评估了以下项目：>柴油喷雾雾化>喷入高压高温大气的柴油喷雾中蒸气和液体的同时浓度测量>喷击燃烧室壁面的特性>高压喷射喷雾初始过程>多级喷射柴油机燃烧特性和废气排放>多级喷射喷射特性>间歇气体射流中环境气体夹带>废气排放高压喷射柴油机燃烧室内柴油机火焰的燃烧特性凸轮与滚轮带之间的润滑油厚度本研究的结果定量地证明了高压喷射对喷射特性、燃烧特性和废气排放的影响。此外，研究结果还为如何将超高压喷射系统应用于实际柴油机提供了参考。

Spray characteristics of the ultra high-pressure injection spray were evaluated, and also diesel combustion characteristics and exhaust emissions were measured when the high-pressure njection system was applied to an experimental diesel engine. The following items were evaluated in this study.> Atomization of diesel spray> Simultanious concentration measurements of vapor and liquid in a diesel spray injected into high pressure and high temperature atomosphere> Characteristics of sprays impinging onto a combustion chamber wall> Initial process of the high-pressure injection spray> Combustion characteristics and exhaust emissions of multi-stage injection diesel engine> Spray characteristics of multi-stage injection> Ambient gas entrainment into intermittent gas jets> Exhaust emissions of high-pressure injection diesel engine> Flame behavior of diesel flame in a combustion chamber> Thickness of lubrication oil between cam and rollertapetThe results obtained by this research demonstrates effects of the high-pressure injection on spray characteristics, combustion characteristics and exhaust emissions quantitatively. Moreover, the results suggest how to apply the ultra high-pressure injection system to real diesel engines.