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对未来的柴油机要求同时降低NO_X、燃烧噪声和颗粒排放。为了满足这些要求,在喷油系统设计中的喷油率形状控制技术是关键因素。叙述直列式喷油泵-油管-喷油嘴系统中高压喷射研究的最新动态,阐明使用小喷孔对缩短滞燃期和减少NO_X排放的效果。还报道了喷油率形状控制技术的最新进展。阐明凹圆弧凸轮型线和长椭圆形回油孔的特性。
The future of diesel engine requirements while reducing NOx, combustion noise and particulate emissions. In order to meet these requirements, injection rate shape control technology in fuel injection system design is a key factor. The latest developments of high pressure injection research in inline injection pump - tubing - injector system are described, and the effect of using small injection holes on shortening the retarding period and reducing NO_X emissions is illustrated. Also reported the latest developments in injection rate shape control technology. Clarify the characteristics of concave arc cam profile and oblong oil return bore.