奈米氮化硼齒輪油對機車引擎性能與廢氣排放影響之研究

The Study on Scooter Engine Performance and Exhaust Emissions Using Nano Boron Nitride Gear Oil

蕭暐亮(Hsiao Wei-Liang)

指導教授 ： 呂有豐

國立臺灣師範大學/科技與工程學院/工業教育學系/碩士(2020年)

https://doi.org/10.6345/NTNU202001012

摘要

本研究針對四行程機車，添加耐磨性質之奈米氮化硼粉末於原廠齒輪油(SAE 85W140)中，探討機車在運行時的能源效率(km/L)、齒輪油溫度特性變化、廢氣污染排放及粒狀汙染物(PM)做為實驗成果的效益評估。本研究之奈米氮化硼齒輪油調配比例為0、0.1、0.5與1.0 wt.%，經基礎性質比較，最後選擇綜效表現最佳及最符合經濟效益的0.1 wt.%齒輪油，作為實車樣本。在磨潤實驗中，奈米氮化硼齒輪油相較於原廠齒輪油，平均降低26.54 %的磨耗量，在熱傳導實驗中，奈米氮化硼齒輪油相較於原廠齒輪油，平均增加0.5 %的導熱係數。在實車實驗中，經由市區及定速的行車型態測試下，奈米氮化硼齒輪油平均能源效率(km/L)改善了3.7 %。在油門開度50 %的測試下，平路與爬坡(4度坡)車速增加了0.9及6.5 %。在ECE-40測試的溫度量測中，齒輪油溫度分別上升7.1 %。在廢氣排放量測中，HC與CO總量減少了31.3 %、25 %，CO2排放提升了47 %，PM值排放在粒徑5 μm以下總量增加了45.22 %。實驗證明奈米氮化硼齒輪油可以提供齒輪較佳潤滑與散熱之效果，並從排放之CO2與PM值的提升可以證實引擎燃燒變得更完全，並降低HC與CO之排放。

關鍵字

奈米氮化硼 ； 齒輪油 ； 磨潤 ； 能源效率(km/L) ； 廢氣汙染排放 ； 粒狀汙染物(PM)

並列摘要

In this study, the wear-resistant nano boron nitride (BN) powder was added to the original gear oil (SAE 85W140), which is using on four-stroke scooter. To evaluate the experimental results, the energy efficiency (km / L), characteristics of gear oil temperature, and the exhaust emissions, such as HC, CO and PM of the scooter using nano BN gear oil were all considered. In this study, nano boron nitride gear oil with 0, 0.1, 0.5 and 1.0 wt.% were tested respectively by basic properties comparison and the most economic benefit; Finally 0.1 wt.% nano BN came out to be the best candidate for the four-stroke engine scooter experiments. In the tribology experiment, it has an average reduction of 26.54% compared with the original gear oil. In the thermal conductivity experiment ,there is an average increasing of 0.5 % compared with the original gear oil. In the field test, the average energy efficiency (km/L) improved by 3.7% under condition of urban and constant speed driving cycle. Moreover, the speed of the flat road and the climbing (four-degree slope) increased by 0.9 and 6.5% under 50% of throttle condition. In the temperature characteristics during the ECE-40 test, the nano BN gear oil temperature was increased by 7.1%. In the exhaust emissions, the total amount of HC and CO decreased by 31.3% and 25% respectively. As for the CO2 emission and the PM value which is the total amount of 5 μm particle size and smaller increased by 47% and 45.22% respectively. Experiments proved that the nano BN gear oil can provide better effect of lubrication and heat dissipation for the gear. Furthermore, the increasing CO2 and PM value can also prove that it make the engine burn more completely and reduce the emissions of HC and CO.

並列關鍵字

nano boron nitride ； gear oil ； Tribology ； energy efficiency(km/L) ； Exhaust emissions ； Particulate matter (PM)

參考文獻

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