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Consideration of Real World Factors Influencing Greenhouse Gas Emissions in ALPHA
Citation:
Consideration of Real World Factors Influencing Greenhouse Gas Emissions in ALPHA. SAE - SOCIETY OF AUTOMOTIVE ENGINEERS. SAE International, Warrendale, PA, , 19, (2017).
Impact/Purpose:
To provide an overview of the ALPHA tool with additional focus on recent updates by presenting the approach for validating and calibrating ALPHA to match particular vehicles in a general sense, then by looking at the individual losses, and calibration factors likely to influence fuel economy.
Description:
Discuss a variety of factors that influence the simulated fuel economy and GHG emissions that are often overlooked and updates made to ALPHA based on actual benchmarking data observed across a range of vehicles and transmissions. ALPHA model calibration is also examined, focusing on developing generic calibrations for driver behavior, transmission gear selection and torque converter lockup. In addition, show the derivation of correction factors needed to estimate cold start emission results.