本SAE推荐实施规程适用于使用快速加速试验程序进行的车辆排气烟度测量。由于这是一项非移动车辆测试，因此该测试可以在路边、卡车仓库、车辆维修设施或其他测试设施中进行。该测试旨在用于柴油发动机驱动的重型卡车和公共汽车。它被设计为与烟度计结合使用，使用消光烟度测量原理。本程序描述了如何执行快速加速测试。它还提供了烟度计和其他测试仪器的规范，并描述了测试期间产生的排气烟的测量和量化算法。其中包括对影响突然加速试验结果的因素的讨论，以及针对这些条件进行校正的方法。除非另有说明，否则这些校正方法应视为snap的组成部分- 加速试验程序。

This SAE Recommended Practice applies to vehicle exhaust smoke measurements made using the Snap-Acceleration test procedure. Because this is a non-moving vehicle test, this test can be conducted along the roadside, in a truck depot, a vehicle repair facility, or other test facilities. The test is intended to be used on heavy-duty trucks and buses powered by diesel engines. It is designed to be used in conjunction with smokemeters using the light extinction principle of smoke measurement.This procedure describes how the snap-acceleration test is to be performed. It also gives specifications for the smokemeter and other test instrumentation and describes the algorithm for the measurement and quantification of the exhaust smoke produced during the test. Included are discussions of factors which influence snap-acceleration test results and methods to correct for these conditions. Unless otherwise noted, these correction methodologies are to be considered an integral part of the snap-acceleration test procedure.