警告本文件的使用可能涉及危险材料、操作和设备。本文件并非旨在解决与其使用相关的所有安全问题。本文件的使用者有责任在使用本文件之前采取适当措施确保人员的安全和健康。本文件使用标准单缸、四冲程循环、可变压缩比、间接喷射柴油发动机，根据十六烷值（CNs）的任意刻度确定柴油的额定值。CN提供了压燃式发动机中柴油燃油点火特性的测量值。CN是以恒定速度在预先设定的条件下确定的- 燃烧室式压燃试验发动机。然而，试验发动机性能与满量程、变速和变负荷发动机之间的关系尚未完全了解。购买本文件时可获得的所有当前修订均包含在购买本文件中。

WARNING?The use of this document can involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of users of this document to take appropriate measures to ensure the safety and health of personnel prior to the application of the document.This document establishes the rating of diesel fuel oil in terms of an arbitrary scale of cetane numbers (CNs) using a standard single cylinder, four-stroke cycle, variable compression ratio, indirect injected diesel engine. The CN provides a measure of the ignition characteristics of diesel fuel oil in compression ignition engines. The CN is determined at constant speed in a pre-combustion chamber-type compression ignition test engine. However, the relationship of test engine performance to full scale, variable speed and variable load engines is not completely understood.All current amendments available at time of purchase are included with the purchase of this document.