直噴式柴油引擎燃料噴射壓力對菜籽油甲酯混合燃料影響之研究

The Study on the Effect of Fuel Injection Pressure in the DI Diesel Engine on the Blending Fuel of Rapeseed Oil Methyl Ester (ROME) with Premium Diesel

張世傑(Shih-Chieh Chang)

指導教授 ： 林百福

國立臺北科技大學/機電學院/車輛工程系所/碩士(2006年)

摘要

添加20％菜籽油甲酯於高級柴油中的混合燃料(ROME20)能獲得與純菜籽油甲酯燃料(ROME)相同的引擎性能，且油耗最小而廢氣濃度的排放亦較合理。由於柴油引擎燃料系統的燃料噴射壓力亦對引擎性能、油耗及廢氣排放濃度等有所影響，因此，本研究以不同的引擎燃料噴射壓力來探討其影響的程度。經引擎實驗結果顯示，在引擎性能幾乎相等的前提下，較原柴油引擎燃料噴射壓力(19.6MPa)低之燃料噴射壓力(15.7MPa)，能減低油耗4.07％和煙度25.69％及HC濃度20.16％的排放，而NOx濃度增加8.15％。反之，較原柴油引擎噴射壓力高之燃料噴射壓力(24.5MPa)，則增加油耗5.16％、煙度3.68％和HC濃度24.96％的排放，而NOx排放濃度改善3.13％。

關鍵字

菜籽油甲酯與高級柴油的混合燃料 ； 直噴式柴油引擎燃料噴射壓力 ； 引擎性能 ； 油耗 ； 廢氣排放和燃燒特性

並列摘要

The blending fuel (ROME20) which is blended by 20% ROME (Rapeseed Oil Methyl Ester) with PD can obtain the engine performance equally as compared ROME. Furthermore, it has the lowest BSFC and its concentration of exhaust gas emissions also reasonable. Because the engine performance, the BSFC and exhaust gas emissions are affected by the fuel-injection pressure of a diesel engine. Thus, this study focused on using different fuel-injection pressure to investigate how much affection to diesel engine.
Experimental results demonstrated that using lower fuel-injection pressure(15.7Mpa) than the one in original engine (19.6Mpa) without influence on the engine performance can reduce the BSFC 4.07％, the concentration of Smoke 25.69％, and the concentration of HC 20.16％, but the concentration of NOx is increased to 8.15％. On the other hand, using higher fuel-injection pressure (24.5Mpa) can reduce the concentration of NOx 3.13％, but increased the BSFC 5.16％,the concentration of Smoke 3.68％, and the concentration of HC 24.96％.

並列關鍵字

Mixing Proportion of ROME ； Fuel Injection Pressure of DI Diesel Engines ； Engine Performance, Fuel Consumption ； Exhaust Gas Emission ； Combustion Characteristics

參考文獻

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