This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Running Loss Emissions from In-Use Vehicles
Technical Paper
1999-01-1464
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
The E-35 “Running Loss” program was planned in the fall of 1996, and conducted in the summer of 1997, as the third part of a series of Coordinating Research Council (CRC) sponsored evaporative emission test programs. One hundred and fifty vehicles (half cars - half light duty trucks) were recruited at a local I/M lane, and tested for running loss emissions at the ATL Facility in Mesa, AZ. The previous CRC programs had studied hot soak, and then diurnal emissions.
Running loss emissions were measured in a Running Loss SHED (RL-SHED) for a 25 minute, 7.5 mile trip on a hot summer day (95°F). Vehicles from model years 1971 through 1991 were tested.
A wide range in emission levels was observed - from a low of 0.13 g/mile to 43 g/mile. The test results were not able to establish whether car emissions are different, or the same, as light duty trucks. The major causes of the high emissions were liquid leaks on carburetor equipped models. Speciation analysis of the end-of-test data indicated that approximately 50% of the emissions come from vapor sources and 50% come from liquid sources.
The program identified 30 vehicles as candidates for repair and retest. The result showed a very high (90+%) effectiveness for the repairs. Repeat tests were run on 10 vehicles to provide an estimate of test-to-test variability.
Recommended Content
Technical Paper | Diurnal Emissions from In-Use Vehicles |
Technical Paper | Development of Driving Cycle for CO2 Emission Test of Heavy-Duty Vehicles |
Technical Paper | Reproducing Real World Emission Tests with a Traffic Simulator |
Authors
Citation
Haskew, H., Eng, K., Liberty, T., and Reuter, R., "Running Loss Emissions from In-Use Vehicles," SAE Technical Paper 1999-01-1464, 1999, https://doi.org/10.4271/1999-01-1464.Also In
References
- Brooks, David et al. “Real World Hot Soak Emissions - A Pilot Study,” SAE 951007, SAE International Congress Detroit, MI February 27 1995
- Haskew, Harold Liberty Tom General Motors “Diurnal Emissions from In-Use Vehicles,” CRC Report No. 610 September 1998
- U.S. Environmental Protection Agency “Evaporative Emission Regulations: Final Rule,” 58 FR No. 55 16005 March 23 1993
- Lieferman, M.W. Martens, S.W. “Fuel Tank Running Losses - a Pre-Control Evaporative Emissions Baseline,” SAE 830630 , International Congress and Exposition February 29 March 4 1973
- McClement, Dennis et al. Automotive Testing Laboratories, Inc. “Measurement of Running Loss Emissions from In-Use Vehicles,” CRC No. 611 February 16 1998
- Reddy, S.R. “Prediction of Fuel Vapor Generation from a Vehicle Fuel Tank as a Function of Fuel RVP and Temperature,” SAE 892089 , SAE Technical Paper Series, Fuels and Lubricants Meeting Baltimore, Maryland September 25-28 1989
- Cullen, Kevin et al. General Motors “Running Loss Temperature Profiles,” SAE 930078 , International Congress and Exposition Detroit, MI March 1-5 1993
- Kruse, R.E. Huls, T.A. “Development of the Federal Urban Driving Schedule,” SAE 730553 , Automotive Engineering Meeting Detroit, MI May 14-18 1973