DEVELOPMENT OF A CHASSIS BASED INSPECTION AND MAINTENANCE PROGRAM FOR HEAVY-DUTY DIESEL POWERED VEHICLES California Environmental Protection Agency Air Resources Board 13th CRC On-Road Vehicle Emissions Workshop San Diego, California April 2003 Presented by: Donald J. Chernich [email protected]
California Environmental Protection Agency. Air Resources Board. 13th CRC On-Road Vehicle Emissions Workshop San Diego, California April 2003 Presented by: Donald J. Chernich [email protected]. - PowerPoint PPT Presentation
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DEVELOPMENT OF A CHASSIS BASED INSPECTION AND MAINTENANCE PROGRAM FOR HEAVY-DUTY DIESEL
POWERED VEHICLES
California Environmental Protection Agency
Air Resources Board
13th CRC On-Road Vehicle Emissions Workshop San Diego, California
6.1 – 7.8%Concentration Range (mean flow weighted)
THCCONOxCO2
SEMTECH-D Correlation Results(Continued)
SEMTECH-D Correlation results consistent with published data.
Coefficient of Variance was less than 5% for all pollutants at applicable standards.
Exceeds EMA Task Force standards of 10%.
SEMTECH-D accuracy is suitable for a large scale I/M program.
NOx Screening Program Conclusions
Large scale I/M program with existing dynamometers and portable emissions analyzers is feasible from a technical standpoint.
Current data indicates difficulty in developing an effective NOx screening test. Per vehicle emission reductions from repair are minimal. There may be other unidentified engine problems that
repairs did not address. No clear cut point to screen out high emitters.
ARB will continue to investigate magnitude and causes of high NOx emissions from HDD vehicles.
Acknowledgements
It is with sincere gratitude that I would like to thank all the people who helped with the development of the Stockton Laboratory and with the M17 testing effort:Mark Burnitzki, Robert Ianni, Tullie Flower, Mike Bernard, Roelof Riemersma, Brian Weitz, John Urkov, Allen Lyons, MSOD QA Section, Dipak Bishnu,Tom Cackette, Kathleen Walsh, Jim Ryden, Paul Jacobs, Chuck Owens, William Vance, Hector Maldonaldo Yvette Friend, Anise Foust, Arlene Bingaman, Lynn Pile, and Paul Loscutoff.
Special Thanks to:Bell Turbo of Stockton (Barbara, Pius, Bill and Joe)DynoMaster (Rob and Lynette Youngblood)UC Riverside CE-CERT (Dr. Wayne Miller, Matt Smith, and Ted Younglove) Sensors, Inc. (Carl Ensfield, Atule Shaw, and Rob Wilson)California Analytical Inc. (Loren Mathews and Matt Swanson) Sincerely, Don Chernich
The Statements and Conclusions presented are not necessarily those of the California Air Resources Board . The mention of commercial products reported herein is not to be construed as an actual or implied endorsement of such products.