This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Chassis Dynamometer Evaluation of On-board Exhaust Emission Measurement System Performance in SI Car under Transient Operating Conditions
Technical Paper
2008-01-1826
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
A commercial on-board exhaust emissions measurement system, the Horiba OBS-1300, was evaluated in a series of chassis dynamometer test trails. A EURO 1 (petrol) SI passenger car, operated under normal and rich combustion conditions, and a combination of static and transient sampling provided a wide range of measurement conditions for the evaluation exercise. The chassis dynamometer facility incorporated an ‘industry standard’ measurement system comprising MEXA-7400 gas analyzer and CVS bag sampling system which were used as ‘benchmarks’ for the evaluation of both OBS-1300 component (exhaust flow meter and species analyzer) measurements and ‘daughter’ emission measurements for regulated gas-phase species (CO, CO2, HC and NOx).
Trials demonstrated very good to reasonable agreement for exhaust flow and CO, CO2 and HC concentration measurements during static (R2 ≈ 0.97, 0.99, 0.99 and 0.97, respectively) and transient (R2 ≈ 0.88, 0.96, 0.95 and 0.86, respectively) testing. Transient emission measurements of CO, CO2 and HC were generally consistent with ‘parent’ exhaust and species analyzer measurements (R2 ≈ 0.89, 0.89 and 0.81, respectively). Minor issues associated with exhaust flow measurement error at engine ‘tick-over’/idle and HC measurement agreement under different engine operating conditions are discussed. However, in general, the OBS-1300 provided a reliable measure of CO, CO2 and HC exhaust emissions under all conditions investigated.
By contrast, the OBS NOx sensor cross-sensitivity to NH3 hindered the reliability of NOx data, especially under rich engine operation conditions.
Authors
Citation
Ropkins, K., Tate, J., Li, H., Andrews, G. et al., "Chassis Dynamometer Evaluation of On-board Exhaust Emission Measurement System Performance in SI Car under Transient Operating Conditions," SAE Technical Paper 2008-01-1826, 2008, https://doi.org/10.4271/2008-01-1826.Also In
References
- Andrews G.E. Li H. Wylie J.A. Zhu G. Bell M.C. Tate J.E. Influence of Ambient Temperature on Cold Start Emissions for EURO1 SI Car using in-vehicle Emissions Measurement in an Urban Traffic Jam Test Cycle SAE technical paper 2005-01-1617
- Samuel S. Morrey D. Fowkes M. Taylor D.H.C. Austin L. Felstead T. Latham S. The Most Significant Vehicle Operating Parameter for Real-World Emission Levels SAE technical paper 2004-01-0636
- Takada Y. Miyazaki T. Lida; N. Study on Local Air Pollution Caused by NOx from Diesel Freight Vehicle SAE technical paper 2002-01-0651
- Joumard R. André M. Vidon R. Tassel P. Pruvost C. Influence of driving cycles on unit emissions from passenger cars Atmospheric Environment 34 4621 4628 2000
- Watson, H.C. Effects of a Wide Range of Drive Cycles on the Emissions from Vehicles of Three Levels of Technology SAE technical paper 95-0221
- Ropkins K. Beebe J. Li H. Daham B. Tate J.E. Bell M.C. Andrews; G.E. Real-world Vehicle Exhaust Emissions Monitoring: Review and Critical Discussion Critical Reviews in Environmental Science and Technology 2007
- Li H. Ropkins K. Andrews G.E. Daham B. Bell M.C. Tate J.E. Hawley G. Evaluation of a FTIR Emission Measurement System for Legislated Emissions Using a SI Car SAE technical paper 2006-01-3368
- Nakamura H. Kihara N. Adachi M. Ishida; K. Development of a Wet-based NDIR and its Application to On-board Emissions Measurement System SAE technical paper 2002-01-0612
- Nakamura H. Kihara N. Adachi M. Ishida; K. Real-Time On-Board Measurement of Mass Emission of NOx, Fuel Consumption, Road Load, and Engine Output for Diesel Vehicles SAE technical paper 2000-11-1141
- Daham B. Andrews G.E. Li H. Bellesteros R. Bell M. Tate J. Ropkins; K. Application of a Portable FTIR for Measuring on road Emissions SAE technical paper 2005-01-0676
- University of Bath Powertrain and Vehicle Research Centre Facility http://www.bath.ac.uk/mech-eng/auto/expertise.html )
- Nakamura H. Asano I. Adachi M. Senda J. Analysis of Pulsating Flow Measurement of Engine Exhaust by a Pitot Tube Flowmeter International Journal of Engine Research 6 1 85 93 2005
- Stephens R.D. Mulawa P.A. Giles M.T. Kennedy K.G. Groblicki P.J. Cadle S.H. Knapp K.T. An Experimental Evaluation of Remote Sensing-based Hydrocarbon Measurements: A Comparison to FID Measurements Journal of the Air & Waste Management Association 46 2 148 158 1996
- Wenzel T.P. Singer B.C. Slott R.R. Stedman D.H. Short-term emissions deterioration in the California and Phoenix I/M programs Transportation Research 9 107 124 2004