Test Data for Light-duty Greenhouse Gas (GHG) Technology
- Overview of light-duty GHG technology test data
- Overview of testing and integration with modeling
- Test data
- Engine mapping process documents
- Publications concerning test data
Starting in 2012, National Vehicle and Fuel Emissions Laboratory's (NVFEL's) National Center for Advanced Technology (NCAT) developed a special test program to deepen EPA’s technical assessment of key light-duty vehicle technologies, such as small boosted engines, high compression ratio naturally-aspirated engines, 8/9/10-speed transmissions, and hybrids. Data from these tests are integrated into the Advanced Light-Duty Powertrain and Hybrid Analysis (ALPHA) Tool, used to predict the GHG reductions possible from various combinations of vehicle technologies.
Both test data and ALPHA outputs are used to inform the Midterm Evaluation (MTE) of Light-Duty Vehicle GHG Emissions Standards for Model Years 2022-2025. The MTE will be conducted through a collaborative, data-driven, and transparent process. The documentation of the test data on this page is part of EPA’s commitment to transparency in the MTE process.
NCAT has integrated benchmarking and modeling activities to ensure robust data.
NCAT has put together a series of data packets describing test procedures and providing results for various advanced technology components. Additional data will be posted here as the data packets are released.
- 2013 Chevrolet Malibu 2.5L Engine Mapping Test Package (ZIP) (1 pg, 9 MB, June 2016)
- 2014 Mazda 2.0L Skyactiv 13-1 Tier 2 Fuel - Engine Mapping Core Test Package (ZIP)(1 pg, 1 MB, June 2016)
- 2015 Ford F150 2.7L Tier 2 Fuel - Engine Mapping Core Test Package (ZIP)(1 pg, 987 K, June 2016)
- 2013 Chevrolet Malibu 6T40 Transmission Test Report (ZIP)(1 pg, 11 MB, June 2016)
- 2014 Ram 1500 HFE 845RE Transmission Test Report (ZIP)(1 pg, 17 MB, June 2016)
Engine Mapping Process Documents
Integrating test data and modeling results for engines into the ALPHA model requires a process for translating test results into a full map representing all phases of engine operation. The following documents explain the process for creating ALPHA engine maps for key engine packages.
- Process for Generating Engine Fuel Consumption Map: Ricardo Baseline Standard Car Engine Tier 2 Fuel
- Process for Generating Engine Fuel Consumption Map: Chevy Malibu 2.5L I4 Engine Using Tier 3 Fuel
- Process for Generating Engine Fuel Consumption Map: Mazda SKYACTIV 2.0L Engine Using Tier 2 Fuel
- Process for Generating Engine Fuel Consumption Map: Ford F150 EcoBoost 2.7L Tier 2 Fuel
- Process for Generating Engine Fuel Consumption Map: Future Atkinson Engine with Cooled EGR and Cylinder Deactivation
- Process for Generating Engine Fuel Consumption Map: Ricardo Cooled EGR Boost 24-bar Standard Car Engine Tier 2 Fuel
- Process for Generating Engine Fuel Consumption Map: Honda Civic L15B7 1.5L Turbo 130kW Engine 91 RON Fuel
- Process for Generating Engine Fuel Consumption Map: Toyota TNGA 2.5L 150kW Atkinson Engine Tier 2 Fuel
Throughout the MTE process, EPA’s goal is to publish as much of our research as possible in peer-reviewed technical papers and journals. The following publications present the test articles, test procedures, and test results from the EPA benchmarking activities in more detail.
- "Fuel Efficiency Mapping of a 2014 6-Cylinder GM EcoTec 4.3L Engine with Cylinder Deactivation," SAE Technical Paper 2016-01-0662, 2016, doi:10.4271/2016-01-0662, Stuhldreher, M.
- "Benchmarking and Hardware-in-the-Loop Operation of a 2014 MAZDA SkyActiv 2.0L 13:1 Compression Ratio Engine," SAE Technical Paper 2016-01-1007, 2016, doi:10.4271/2016-01-1007, Ellies, B., Schenk, C., and Dekraker, P.
- "Investigating the Effect of Advanced Automatic Transmissions on Fuel Consumption Using Vehicle Testing and Modeling," SAE Int. J. Engines 9(3):2016, doi:10.4271/2016-01-1142, Moskalik, A., Hula, A., Barba, D., and Kargul, J.
- "Downsized Boosted Engine Benchmarking Method and Results," SAE Technical Paper 2015-01-1266, 2015, doi:10.4271/2015-01-1266, Stuhldreher, M., Schenk, C., Brakora, J., Hawkins, D., Moskalik, A., and Dekraker, P.
- "Vehicle Component Benchmarking Using a Chassis Dynamometer," SAE Int. J. Mater. Manf. 8(3):2015, doi:10.4271/2015-01-0589, Moskalik, A., Dekraker, P., Kargul, J., and Barba, D.