SAE J2908_201709

1. SCOPE
2. REFERENCES
3. TERMS AND DEFINITIONS
4. LABORATORY AND VEHICLE EQUIPMENT
5. MEASUREMENTS
6. VEHICLE WARMUP AND PRECONDITIONING PROCEDURES
7. POWERTRAIN SYSTEM POWER TEST
8. PHEV ELECTRIC-ONLY DRIVE POWER TEST (PHEV ONLY)
9. PEAK ELECTRIC ASSIST POWER TEST (xEVS ONLY)
10 PEAK ELECTRIC REGENERATIVE BRAKING POWER TEST
   (HEV, PHEV, AND BEV ONLY)
11 NOTES
Appendix A - Guidance on SOC Conditioning
Appendix B - Comparing J2908 Power to 'Engine Power'
             (J1349 or UN R85)
Appendix C - Approaches for Powertrain System Power Test
Appendix D - Summary of DC Electrical Bus Measurement
             Points

Specifies test methods for evaluating the maximum power of electrified vehicle powertrain systems by direct measurement at the drive wheel hubs or axles.

This document provides test methods for evaluating the maximum power of electrified vehicle powertrain systems by direct measurement at the drive wheel hubs or axles. Additional tests are included specifically for PHEVs to measure electric-only propulsion power and for HEVs to measure electric power assist and regenerative braking. The testing requires either a chassis or hub dynamometer for all driven wheels. Results are processed to provide fair and consistent comparisons of power capabilities among different designs of electrified powertrains. Tests can also be performed on conventional vehicles if precise comparisons to electrified vehicles are desired.