1.1 本规范涵盖了适用于某些汽油压燃式发动机和车辆的试验燃料要求，这些发动机和车辆专门设计用于使用本规范所述燃料。这些类汽油燃料可能含有某些汽油混合成分，因此在本规范中称为“汽油压燃（GCI）试验燃料” 1.1.1 本规范所述的GCI试验燃料仅供发动机和车辆制造商在持续开发适当设计的压燃式发动机时使用，该发动机可利用GCI试验燃油的某些化学和物理特性来实现更高的效率和更低的排放（以下称为“GCI发动机”）。这些GCI试验燃料不适用于一般公众。 1.1.2 GCI发动机仅包括那些直接将燃料喷射到燃烧室中并依靠燃料自燃部分或全部启动燃烧的发动机。尽管根据燃料和发动机运行条件可以使用各种燃烧策略，但与传统柴油压燃式发动机相比，在某些运行条件下，GCI发动机中的燃料分层水平通常会降低。使用辅助点火源（如火花塞）的发动机在某些情况下（但不是所有情况下）可以被视为GCI发动机。 1.1.3 本规范中涵盖的GCI试验燃料可能含有含氧化合物，如醇和醚。特定含氧化合物的类型和浓度的推荐限制见 附录X3 . 1.2 本规范描述了汽车发动机的GCI试验燃料，这些燃料目前尚未广泛向公众提供，但正在开发中，需要进行规定的标准试验 满足与本规范所述GCI试验燃料相同或类似要求的商用燃料，如果/当此类发动机投入商业使用时，可向公众提供；然而，一般公众使用本规范需要进行重大修改。本规范正在持续审查中，可能会根据燃料、汽车要求、试验方法或其组合的变化进行修订。因此，本规范的所有用户应参考最新版本。 1.3 传统的柴油压燃式发动机和燃油系统设计用于燃油，与GCI试验燃油相比，燃油具有更低的挥发性、更高的闪点和更高的粘度。因此，此类发动机通常不适合与GCI试验燃料一起使用。 为了安全使用低闪点、GCI试验燃料，可能需要对某些硬件进行修改。 注1: 如果对最新版本的规范有任何疑问 D8275 ，联系ASTM国际总部。 1.4 以国际单位制表示的数值应视为标准。提供的任何其他值仅供参考。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers the requirements of test fuels suitable for use in certain gasoline compression-ignition engines and vehicles, which have been specifically designed to operate on the fuel described in this specification. These gasoline-like fuels, which may contain certain gasoline blending components, are henceforth referred to in this specification as “gasoline compression-ignition (GCI) test fuels.” 1.1.1 The GCI test fuels described by this specification are only intended for use by engine and vehicle manufacturers in the continuing development of appropriately designed compression-ignition engines that can take advantage of certain chemical and physical properties of GCI test fuels to achieve higher efficiency and lower emissions (henceforth referred to as “GCI engines”). These GCI test fuels are not intended for use by the general public. 1.1.2 GCI engines include only those engines that directly inject fuel into the combustion chamber, and rely on autoignition of the fuel to initiate combustion part or all the time. Although various combustion strategies may be used depending on the fuel and engine operating condition, the level of fuel stratification is typically decreased in GCI engines under certain operating conditions relative to traditional diesel compression-ignition engines. Engines that use an auxiliary ignition source (such as a spark plug) some but not all of the time could qualify as GCI engines. 1.1.3 The GCI test fuels covered in this specification may contain oxygenates, such as alcohols and ethers. Recommended limits on the type and concentration of specific oxygenates are provided in Appendix X3 . 1.2 This specification provides a description of GCI test fuels for automotive engines that are not currently widely available to the general public, but are being developed and require defined standard test fuels. Commercial fuels meeting the same or similar requirements as the GCI test fuels described in this specification could become available to the general public if/when such engines are introduced into commerce; however use of this specification by the general public would require significant modifications. The specification is under continuous review, which can result in revisions based on changes in fuel, automotive requirements, test methods, or a combination thereof. All users of this specification, therefore, should refer to the latest edition. 1.3 Traditional diesel compression-ignition engines and fuel systems are designed for use with fuel, which has a lower volatility, higher flash-point, and higher viscosity than GCI test fuels. Such engines are therefore usually unsuitable for use with GCI test fuels. Certain hardware modifications may be required for the safe use of low flash-point, GCI test fuels. Note 1: If there is any doubt as to the latest edition of Specification D8275 , contact ASTM International Headquarters. 1.4 The values stated in SI units are to be regarded as the standard. Any other values given are provided for information only. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.