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Exhaust Gas Emission Control at the Car-Owner Level-An Insoluble Problem?
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English
Abstract
The difficulty of field surveillance of cars in service is investigated and various test procedures are discussed in this context.
Due to the high variability of the measured exhaust emission values, only cars with very high emissions, so-called outliers, can be identified in an emission test. This means that only vehicles with emissions far above the standards can be singled out. This also holds true for the idling test, where the variability of results is at its highest.
On the other hand, the decisive factor for the quality of our ambient air is the overall emission mean value.
Identifying and adjusting the outliers will, however, bring improvement in ambient air quality only if the number of such outliers is so high that they have a significant influence on the overall exhaust emission mean value of the vehicles on the road considered. There is a true dilemma in that it cannot be seen from single measurements whether or not the overall emission mean value has been changed at all and if so, whether or not the changed mean value exceeds the standard.
Relatively simple criteria and a straightforward evaluation of the whole story lead to the conclusion that an inspection of the car components influencing exhaust emissions represents an optimum in terms of cost and efficiency.
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Authors
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Citation
Klingenberg, H. and Neumann, K., "Exhaust Gas Emission Control at the Car-Owner Level-An Insoluble Problem?," SAE Technical Paper 851658, 1985, https://doi.org/10.4271/851658.Also In
References
- Report by the Committee on Motor Vehicle Emissions: Report to the Senate, the House of Representatives and the Administrator of the Environmental Protection Agency (EPA) National Academy of Sciences Washington, D.C. 1974
- Williams, Marcia E. Impacts of Emission Variability in the Development of Mobile Source Compliance Assurance Programs APCA-Meeting New Orleans September 1975
- Juneja, W.K. Horchler D.D. Haskew H.M. Exhaust Emissions Test Variability Proceedings of APCA-Meeting New Orleans Oct. 1975
- Klingenberg, H. Harmonization of Testing Procedures for Automotive Exhaust Gas SAE-Paper No. 780647 1978
- Klingenberg, H. Schürmann D. Effects of Exhaust Emissions Test Data. Variability and Interrelation between Certification Assembly-Line and Field Testing. APCA-Meeting New Orleans March 1979
- Klingenberg, H. Schürmann D. Proposal for New Exhaust Emission and Testing Procedures Based on Averaging SAE-Paper No. 821192 1982
- Waldeyer, H. Hassel D. Dursbeck F. Untersuchung des Einflusses von Einstelldaten und Bauteilen auf das Emissionsverhalten im Verkehr befindlicher Pkw. (BMI/UBA 104 05 341) Entwicklungslinien in Kraftfahrzeugtechnik und Straßen-verkehr - Forschungsbilanz 1980 Verlag TOV Rheinland Cologne (FRG)
- Küper, P.-F. Lörcher H. Syste-matische Ermittlung des Einflusses wichtiger Bauteileparameter auf die Abgasemission von Pkw mit Ottomotor. (BMI/UBA-Projekt 104 05 341) Entwicklungslinien in Kraftfahrzeug-technik und Straßenverkehr -Forschungsbilanz 1980 Verlag TOV Rheinland Cologne (FRG)