SAE J 1634:2021 PDF Download

SAE J 1634:2021 is a standard that establishes uniform procedures for testing battery electric vehicles (BEVs) that can be operated on public and private roads. The standard applies specifically to vehicles that rely solely on batteries as their power source. The main objective of this standard is to provide standardized tests that can determine the energy consumption and range of light-duty vehicles (LDVs).

The testing procedure outlined in this standard is based on the federal emission test procedure (FTP) using the urban dynamometer driving schedule (UDDS) and the highway fuel economy driving schedule (HFEDS). These test cycles have been widely used for evaluating the performance of vehicles. The standard also includes guidelines for supplementary testing on the US06, SC03, and cold FTP procedures, providing a flexible testing methodology that can accommodate different testing requirements.

It is important to note that the range and energy consumption values specified in this standard are raw, test-derived values. Additional corrections may need to be applied for regulatory purposes such as corporate average fuel economy or vehicle labeling. The focus of this standard is on evaluating the overall performance of the vehicle system as a whole, rather than individual subsystems. The standard also emphasizes the importance of allowing for realistic alternatives to be considered for new technology advancements.