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The Effects of Driveability on Emissions in European Gasoline Vehicles
Technical Paper
2000-01-1884
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Fuel volatility and vehicle characteristics have long been recognised as important parameters influencing the exhaust emissions and the driveability of gasoline vehicles. Limits on volatility are specified in a number of world-wide / national fuel specifications and, in addition, many Oil Companies monitor driveability performance to ensure customer satisfaction. However, the relationship between driveability and exhaust emissions is relatively little explored.
A study was carried out to simultaneously measure driveability and exhaust emissions in a fleet of 10 European gasoline vehicles. The vehicles were all equipped with three-way catalysts and single or multi-point fuel injection. The test procedure and driving cycle used were based on the European Cold Weather Driveability test method. Six experimental test fuels of varying volatility were tested in the vehicle fleet, at temperatures of -5°C and+10°C, to provide a range of driveability performance and allow the relationship between driveability and emissions to be investigated.
The main differences in demerits were seen between different vehicles and changes in ambient temperature; fuel volatility and oxygenate content had a relatively minor effect. Analyses of the emissions data showed that a change in the exhaust emissions occurred when driveability malfunctions such as stumble or hesitation were observed. These findings were limited to the data generated at -5°C only as there were too few demerits produced at+10°C. Driveability demerits gave rise to a statistically significant increase in HC and CO2 emissions, an apparent increase in NOx, but no correlation with CO emissions. The data also showed that the control of air/fuel ratio during engine warm up was a factor influencing driveability and emissions performance.
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Bazzani, R., Kuck, K., Kwon, Y., Brown, M. et al., "The Effects of Driveability on Emissions in European Gasoline Vehicles," SAE Technical Paper 2000-01-1884, 2000, https://doi.org/10.4271/2000-01-1884.Data Sets - Support Documents
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References
- European Programme on Emissions, Fuels and Engine Technologies ACEA and EUROPIA EPEFE Report 1995
- AUTO/OIL Air Quality Improvement Research Program May 1993
- Jorgensen, SW Benson, JD A Correlation between Tailpipe Hydrocarbon Emissions and Driveability SAE 962023
- Jorgensen, SW Benson, JD Measurements of Driveability and Emissions at Cool Ambient Temperatures SAE 941870
- Cold Weather Driveability Test Procedure CEC Tentative Code of Practice
- ISO 4259 Petroleum Products - Determination and Application of Precision Data in Relation to Methods of Test 2nd
- CONCAWE The Effect of Gasoline Volatility on Vehicle Exhaust Emissions at Low Ambient Temperatures