Science Inventory

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.

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Product Published Date: 03/28/2017
Record Last Revised: 08/04/2017
OMB Category: Other
Record ID: 328377

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF AIR AND RADIATION

OFFICE OF TRANSPORTATION AND AIR QUALITY

ADVANCED TECHNOLOGY DIVISION

TECHNOLOGY DEVELOPMENT GROUP