本SAE推荐实践旨在提供一个准确、统一和可重复的程序，用于在动力总成测功机上模拟MD/HD传统车辆（CV）和混合动力电动汽车（HEV）以及插电式混合动力电动汽车（PHEV）和电池电动汽车（BEV）的使用，以测量排放和燃油经济性。本文件没有规定要测量的排放成分（例如，HC、CO、NOx、PM、CO 2 ），因为该决定将取决于测试者的目标。虽然该程序的主要焦点是计算燃料和能量消耗，但预计在执行该程序期间也可以记录排放。 应该注意的是，本文件中涉及的大多数MD/HD动力系统将由单独通过排放认证的发动机提供动力。发动机认证程序出现在《联邦法规》标题40 86和1065中。

This SAE Recommended Practice was established to provide an accurate, uniform, and reproducible procedure for simulating use of MD/HD conventional vehicles (CVs) and hybrid-electric vehicles (HEVs), as well as plug-in hybrid-electric vehicles (PHEVs) and battery electric vehicles (BEVs) on powertrain dynamometers for the purpose of measuring emissions and fuel economy. This document does not specify which emissions constituents to measure (e.g., HC, CO, NOx, PM, CO 2 ), as that decision will depend on the objectives of the tester. While the main focus of this procedure is for calculating fuel and energy consumption, it is anticipated that emissions may also be recorded during execution of this procedure. It should be noted that most MD/HD powertrains addressed in this document would be powered by engines that are certified separately for emissions. The engine certification procedure appears in the Code of Federal Regulations, Title 40 §86 and §1065.