skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Investigation of Emissions Impacts from Hybrid Powertrains

Abstract

The National Renewable Energy Laboratory (NREL) under California Air Resources Board (CARB) Agreement Number 14-613, NREL Contract Number FIA-15-1802, has performed a series of chassis dynamometer and portable emissions measurement system (PEMS) studies to better understand how tailpipe NOx emissions are affected by the addition of a hybrid propulsion system as compared with conventional medium-duty and heavy-duty diesel vehicles operating in the same vocations. Previous work has demonstrated the addition of an aftermarket hybrid propulsion system can provide a significant fuel economy advantage under the right drive cycle conditions. However, many vehicles also exhibited an increase in tailpipe NOx emissions. This work, under CARB Agreement Number 11-600, NREL Contract Number FIA-11-1763 demonstrated an increase in tailpipe NOx across a number of vocations and vehicle body styles. The emissions increase was also observed using various test methods including chassis dynamometer, PEMS, and in-use on-board diagnostics (OBD) NOx sensors (Thornton et al. 2014). The work presented in this report represents a continued effort to better understand the cause of this emissions increase and steps that can be taken to ensure the issue is addressed for future vehicles going forward.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1];  [1]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
California Air Resources Board (CARB)
OSTI Identifier:
1593096
Report Number(s):
NREL/TP-5400-75782
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; emissions; emissions controls; medium and heavy-duty hybridization; fuels and combustion science

Citation Formats

Ragatz, Adam C, Burton, Jonathan L, Miller, Eric S, and Thornton, Matthew J. Investigation of Emissions Impacts from Hybrid Powertrains. United States: N. p., 2020. Web. doi:10.2172/1593096.
Ragatz, Adam C, Burton, Jonathan L, Miller, Eric S, & Thornton, Matthew J. Investigation of Emissions Impacts from Hybrid Powertrains. United States. doi:10.2172/1593096.
Ragatz, Adam C, Burton, Jonathan L, Miller, Eric S, and Thornton, Matthew J. Tue . "Investigation of Emissions Impacts from Hybrid Powertrains". United States. doi:10.2172/1593096. https://www.osti.gov/servlets/purl/1593096.
@article{osti_1593096,
title = {Investigation of Emissions Impacts from Hybrid Powertrains},
author = {Ragatz, Adam C and Burton, Jonathan L and Miller, Eric S and Thornton, Matthew J},
abstractNote = {The National Renewable Energy Laboratory (NREL) under California Air Resources Board (CARB) Agreement Number 14-613, NREL Contract Number FIA-15-1802, has performed a series of chassis dynamometer and portable emissions measurement system (PEMS) studies to better understand how tailpipe NOx emissions are affected by the addition of a hybrid propulsion system as compared with conventional medium-duty and heavy-duty diesel vehicles operating in the same vocations. Previous work has demonstrated the addition of an aftermarket hybrid propulsion system can provide a significant fuel economy advantage under the right drive cycle conditions. However, many vehicles also exhibited an increase in tailpipe NOx emissions. This work, under CARB Agreement Number 11-600, NREL Contract Number FIA-11-1763 demonstrated an increase in tailpipe NOx across a number of vocations and vehicle body styles. The emissions increase was also observed using various test methods including chassis dynamometer, PEMS, and in-use on-board diagnostics (OBD) NOx sensors (Thornton et al. 2014). The work presented in this report represents a continued effort to better understand the cause of this emissions increase and steps that can be taken to ensure the issue is addressed for future vehicles going forward.},
doi = {10.2172/1593096},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {1}
}

Technical Report:

Save / Share: