生物柴油发动机磨损特性实验研究

分别以生物柴油和0号柴油为燃料进行发动机台架试验，对台架试验前后发动机主要摩擦副的磨损特性进行研究。结果表明，台架试验后两者的缸套、活塞、活塞环、连杆、连杆轴瓦、凸轮轴、喷油泵等部件的磨损量均未超过极限值，但生物柴油发动机主要部件的磨损程度略小于0号柴油发动机。活塞环和缸套的扫描电镜分析结果进一步说明，与0号柴油相比，生物柴油由于自身黏度高，且具有一定的润滑性能，使得其更容易在汽缸内壁形成一层油膜，从而达到抗磨减摩作用。

STUDY ON WEAR CHARACTERISTICS OF ENGINE FUELED WITH BIODIESEL

Bench tests were conducted for evaluating the wear characteristics of diesel engine fueled with biodiesel and No. 0 petro-diesel, respectively. The wear and morphologies of the engine were analyzed before and after the bench test. The results indicate that the wear extent of moving parts of the engines such as cylinder liner, piston, piston ring, connecting rod, connecting rod bearing, camshaft and fuel injection pump was all in normal range for the two diesels, but the wear of biodiesel engine is slightly less than that of petro-diesel engine. SEM analysis of the cylinder liner and piston ring also shows that the anti-wear performance of biodiesel is better than that of petro-diesel because of higher viscosity and better lubricity of biodiesel which more easily form a film on the cylinder wall.