一种测量汽油润滑性的方法

开发出一种测量汽油润滑性的简单易用的试验方法，为此在测定柴油润滑性的ＨＦＲＲ方法的基础上，重新设计高频往复试验机的油盒与夹心系统，把整个试验机封闭在一个有机玻璃罩中以进一步减少挥发，并在玻璃罩上安装一个磨口塞子以便调控空气湿度，用水的蒸汽压代替相对湿度作为湿度的调控指标，并严格控制清洗程序以避免试验过程中的交叉污染，结果表明，该试验方法的重复性很好。

A Test Method to Measure Gasoline Lubricity

The lubricity of gasoline is the least understood of all three types of liquid fuels (aviation kerosene,diesel fuel and gasoline fuel), due largely to the lack of a reliable test method for measuring the lubricity of such a much volatile and contamination sensitive material. A simple and easy to use HFRR gasoline test method has been successfully developed by(i) redesigning the fuel bath/reciprocating ball holder system to solve the high volatility problem of gasoline in HFRR tests, (ii) enclosing HRFF in a sealable perspex box with a hole fitted with a ground perspex plug for convenient humidity control, (iii) using water vapour pressure (WVP) instead of relative humidity (RH) as an index of humidity to correctly reflect the true water content in the air, and (iv) designing a very strict cleaning procedure so as to avoid cross contamination and guarantee good repeatability. It has been found that HFRR test method has good repeatability and differentiating ability.