本文目的在於了解生質柴油與柴油對於機油抗磨耗能力的影響。利用經實車測試後之機油(分別以B1與B5作為燃油)與機油中混入不同濃度生質柴油(B100、B50、B5及D100)的混合機油，將此兩類型之機油利用TE77往復磨耗試驗機，以點對平面的接觸方式搭配多種試驗溫度進行往復式磨耗試驗。並且利用SEM、EDS、AES與ESCA等儀器進行磨耗表面形貌觀察與表面膜成分分析。
試驗結果顯示，在相同的燃油稀釋率下，無論是在低溫或高溫，含有生質柴油的機油其抗磨耗能力，均較含純柴油的機油佳。在室溫下，含有生質柴油的機油具有較佳的物理吸附能力，而在高溫時，生質柴油似乎對ZDDP添加劑的反應速率有觸媒效果，能夠提升化合膜成長速率，但生質柴油濃度需適當，B100的生質柴油將會導致磨潤化學磨耗的發生，而三種濃度的生質柴油，以B5生質柴油對機油抗磨耗能力影響最小。

In this thesis, effects of engine oils containing biodiesel and diesel on the performance are discussed. Wear test engine oils can be divided into two types. The first type oils through field test (using B1 or B5 asfuel). The second type is the mixture of diesel (D100) and biodiesel (B100, B50, B5) for different concentration. Wear tests are performed under ball-on-plate contact type under different test temperature conditions by Cameron-Plint TE77 reciprocating wear test rig. After wear tests, the morphology of wear specimens are observed by scanning electron microscopy (SEM). The compositions of the chemical films are identified using an energy dispersive spectrometer (EDS) and an auger electron spectroscopy / electron spectroscopy for chemical analysis (AES/ESCA).
Results show that in the same fuel dilution rate, whether at a low or high temperature, the anti-wear ability of engine oils with biodiesel is better than that of engine oils with diesel oil. At room temperature, engine oils with biodiesel have better physical adsorption capacity; at high temperature biodiesel tends to have catalytic effects with ZDDP additives. This phenomenon would help increase the growth rate of chemical films. However, concentration of the biodiesel should be controlled because engine oil with B100 causes tribochemical wear. Among three different concentration biodiesels, anti-wear ability of engine oil with B5 is higher.

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