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Studies on Emission Measurement Techniques for Super-Ultra Low Emission Vehicles
Technical Paper
2002-01-2709
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The accuracy and precision of exhaust gas mass emission measurement has recently come under close scrutiny as the absolute mass emission level has become lower. The uncertainty of the mass emission measurement can not be defined simply as it is a combination of many parameters in the measurement system. This paper lists and reviews the major factors that affect the accuracy in super-low emission measurement when using a constant volume sampler (CVS), such as analyzer performance, HC contamination, excessive dilution of sample gases, error in DF calculations and the variation of vehicle emission itself. Additionally, an alternative sampling system, using the bag mini-diluter (BMD) technique, is investigated in comparison with the enhanced CVS system, i.e. use of dilution air refiner, and heating of the whole system. Some ideas for reducing the HC contamination are also described as it is an important parameter that affects measurement accuracy in both the CVS and BMD systems.
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Citation
Ohtsuki, S., Inoue, K., Yamagishi, Y., and Namiyama, K., "Studies on Emission Measurement Techniques for Super-Ultra Low Emission Vehicles," SAE Technical Paper 2002-01-2709, 2002, https://doi.org/10.4271/2002-01-2709.Also In
References
- California Air Resources Board Preliminary Staff Report Proposed Amendments to Low-Emission Vehicle Regulations May 1 1995
- Inoue K. et.al. Numerical Analysis of Mass Emission Measurement Systems for Low Emission Vehicles SAE paper 1999-01-0150
- Tayama A. et.al. A Study of a Gasoline-Fueled Near-Zero-Emission Vehicle Using an Improved Emission Measurement System SAE Paper, 982555
- Velosa J. Error Analysis of the Vehicle Exhaust Emission Measurement System SAE paper 930393
- Hood J.F. et.al. Predicting and Preventing Water Condensation in Sampled Vehicle Exhaust for Optimal CVS Dilution SAE paper 980404
- Austin T.C. et.al. Improving the Calculation of Exhaust Gas Dilution During Constant Volume Sampling SAE paper 980678
- Sherman M. T. et.al. Error Analysis of Various Sampling Systems SAE 2001-01-0209
- Landry M. et.al. Simulation of Low Level Vehicle Exhaust Emissions for Evaluation of Sampling and Analytical Systems SAE paper 2001-01-0211
- Guenther M. et.al. Advanced Emissions Test Site for Confident PZEV Measurements SAE Paper 2002-01-0046
- Behrendt H. et.al. Studies on Enhanced CVS Technology to Achieve SULEV Certification SAE 2002-01-0048
- Yoda K. et.al. A New Proportional Collection System for Extremely Low Emission Measurement in Vehicle Exhaust Society of Automotive Engineers of Japan Spring Convention Proceedings 9933105 1999
- Guenther M. et.al. Improved Bag Mini-diluter Sampling System for Ultra-low Level Vehicle Exhaust Emissions SAE Paper 2000-01-0792
- Nagy D. B. et.al. Evaluation of the Bag Mini-Diluter and Direct Vehicle Exhaust Volume System for Low Level Emissions Measurement SAE Paper 2000-01-0793
- Guenther M. et.al. Refinement of a Bag Mini-Diluter System SAE Paper 2001-01-0212
- Sun E.I. et.al. Evaluation of Fluorocarbon Polymer Bag Material for Near Zero Exhaust Emission Measurement SAE paper 2001-01-3535
- Hill J. et.al. Evaluation of New Bag Sampling Materials for Low Level Emissions Measurements SAE paper 2002-01-0051
- Sougawa Y. et.al. Improvement of Repeatability in Tailpipe Emission Measurement with Spark Ignition Direct Injection (SIDI) Vehicles SAE paper, 2002-01-2710