根据美国GHG和CAFE法规，制造商需要进行验证性测试，以验证间接空调信用（参考40 CFR 86.1868-12）。本SAE推荐规程旨在为制造商提供2020年及以后车型年的更新标准。本SAE推荐规程也适用于向加州空气资源委员会（CARB）报告信用使用和工程分析。 本SAE推荐规程描述了IMAC GHG CRP在制定测试程序、发布SAE标准和确定性能要求方面所做的工作，以证明空调技术的性能- 符合监管要求的经批准的信用菜单。 此外，本SAE推荐实施规程中附有车辆制造商在建立工程分析时可使用的说明，以代替对不包含信用生成技术的车辆进行AC17测试。执行工程分析的这些程序应足以满足法规的要求，以从预先批准的信用菜单中获得间接A/C技术的信用。

Under U.S. GHG and CAFE regulations, manufacturers are required to perform confirmatory testing to validate indirect air conditioning credits (refer to 40 CFR 86.1868-12). The purpose of this SAE Recommended Practice is to provide manufacturers with updated criteria for the 2020 and later model years. This SAE Recommended Practice is also suitable for reporting credit using and Engineering Analysis to the California Air Resources Board (CARB). This SAE Recommended Practice describes the work done by the IMAC GHG CRP to develop test procedures, publish SAE Standards, and determine performance requirements to demonstrate the performance of A/C technologies from the pre-approved credit menu meeting regulatory requirements. Also, enclosed in this SAE Recommended Practice are instructions that can be used by vehicle manufacturers in establishing an engineering analysis in lieu of performing the AC17 test on a vehicle which does not incorporate the credit-generating technologies. These procedures for performing an engineering analysis should be sufficient to satisfy the requirements of the regulation to earn credits for indirect A/C technologies from the pre-approved credit menu.