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SAE J3174 (JUL2019)

Historical Revision

Recommended Practice for an Engineering Analysis for A/C Efficiency Credits

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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 Reccomended Practice is to provide manufacturers with updated criteria for the 2020 and later model years. This Recommended Practice discribes 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 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.

SDO SAE: SAE International
Document Number J3174
Publication Date July 18, 2019
Language en - English
Page Count 25
Revision Level 201907
Supercedes
Committee
Publish Date Document Id Type View
Sept. 8, 2022 J3174_202209 Revision
July 18, 2019 J3174_201907 Revision