低速连续滑动 SAE No. 2 μPVT 程序

[中文适用范围]： 本 SAE 文件旨在作为标准测试@的定义，该定义可能会经常更改，以跟上经验和技术进步的步伐。在考虑其使用时应牢记这一点。 SAE 2 号摩擦测试用于评估采用汽车变速箱油组合的自动变速箱板式离合器的摩擦特性。本文件的具体目的是定义 VT 测试，用于评估湿摩擦系统低速滑动特性随速度、温度和压力的变化。该程序旨在作为供应商和最终用户的建议方法。摩擦系统的供应商或用户选择的唯一变量是： ?摩擦材料 ?体液 ？反应板 ?油流量（可选） 在报告此测试结果时，必须清楚地识别这四个变量。如果本文件中描述的任何测试参数或系统硬件发生变化，除了摩擦材料@测试流体@或反应板@之外，数据可能不会报告为使用本文件获得的。该程序旨在评估斜坡速度摩擦特性@也称为扫描@，并可用于演示不同水平的滑动速度@施加压力@和流体温度之间发生的容量变化。摩擦系数@的水平以及扭矩容量随速度@的趋势可用于比较候选材料或流体。 [外文原描述]： This SAE Recommended Practice is intended as the definition of a standard test, which may be subject to frequent change to keep pace with experience and technical advances. This should be kept in mind when considering its use. The SAE No. 2 friction test is used to evaluate the friction characteristics of automatic transmission plate clutches with automotive transmission fluid combinations. The specific purpose of this document is to define a µPVT test for the evaluation of the variation of wet friction system low speed slip characteristics as a function of speed, temperature, and pressure. This procedure is intended as a suggested method for both suppliers and end users. The only variables selected by the supplier or user of the friction system are: Friction material Fluid Reaction plates Oil flow (optional) These four variables must be clearly identified when reporting the results of this test. If any of the test parameters or system hardware as described in this document are changed—other than the friction material, test fluid, or reaction plates—the data may not be reported as being obtained using this document. This procedure is intended to evaluate ramped speed friction characteristics, also called sweeps, and can be used to demonstrate capacity changes that occur between the different levels of slip speed, applied pressure, and fluid temperature. The level of coefficient of friction, as well as the trends in torque capacity with speed, can be used to compare candidate materials or fluids.