本文目的在於探討生質柴油與石化柴油對引擎零組件磨潤性能的影響。利用經實機測試後之機油與自行調製不同含水量的石化柴油及不同濃度生質柴油，將此兩類型之試驗用油利用TE77往復磨耗試驗機與微震磨耗試驗機分別 進行滑動磨耗試驗及微震磨耗試驗。並且在不同的試驗溫度、含水量等條件下進行磨耗試驗。此外，利用SEM、EDS等儀器進行磨耗表面形貌觀察與表面膜成份分析。
試驗結果顯示，實機測試後之機油磨耗試驗中，室溫時，其抗磨耗能力由引擎機油中物理吸附膜與微液動壓效應的強弱所主導；而在150°C時，則由引擎機油中ZDDP添加劑分解含量的多寡及反應速率所主導。燃料油試驗中，在室溫時，含水量增加，能在表面形成連續水膜並生成氧化膜，以提升燃料油的抗磨耗能力；在溫度70°C時，含水量增加會與生質燃料油中的脂肪酸甲酯奪爭吸附位置並生成氧化膜。此外，含水量增加會阻礙石化柴油形成抗磨耗生成物，造成燃料油磨耗量隨之增加。微震磨耗試驗中， B20燃料油中的脂肪酸甲酯具有阻尼(damper)的效果，因此其表面損傷均較D100燃料油輕微。此外，含水量增加亦會導致燃料油酸化且具腐蝕性，進而造成腐蝕磨耗。

This paper aims to investigate the effects of biodiesel and petro-diesel on the tribological performance of engine components. Wear test oil can be divided into two types.The first type is egine oil through field test.The second type is the mixture of diesel(D100) and biodiesel(B5,B50,B100) for different water content.Sliding and fretting wear tests are performed under different test temperature and water content conditions by Cameron-Plint TE77 reciprocating and fretting wear test rig. In addition, use scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS) separately to observe the morphology of wear specimens and indentify the composition of surface films
Results show that wear tests of field test engine oil at room temperature, the anti-wear ability of engine oil is dominated by the physical adsorption capacity and micro-hydrodynamic effects; while at 150°C, the anti-wear ability of engine oil is depend on the mount of decomposition of ZDDP additives and their chemical reaction rate.In the fuel oil tests, at room temperature, the increasing water content in the fuel oil can form a continuous film of water on the surface and produce oxide films to improve the anti-wear ability of fuel oil; while at 70°C,the increasing water content in the bio-fuel oil and the ester adsorptive films in the bio-fuel oil will compete the adsorptive positions with each other and produce oxide films. In addition, the increasing water content in petro-diesel will hinder the formation of anti-wear products and results in increasing wear volume. In the fretting wear tests, the ester adsorptive films in B20 fuel provide damping effects, so the surface damage of B20 fuel is slighter than D100 fuel. In addition, the increasing water content of fuel oil will casue fuel oil acidfied and result in corrosion wear.

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