Emissions Level Approximation at Cold Start for Spark Ignition Engine Vehicles

Abstract:

This paper present a study regarding the emissions produced at the engine cold start. Also, the paper presents a brief survey of current extra emissions estimation methods. The main goal of this work is to describe the relative cold start extra emissions as a function of exhaust gas temperature. Experimental research has been done for a light vehicle, Dacia Sandero, equipped with a 1390 cm³ Renault spark ignition engine (Power = 55 kW at 5500 rpm). There were been made several tests, in different temperature conditions, in the could season, using a portable analyzer, GA-21 plus (produced by Madur Austria). The parameters measured with the analyzer and used in the analysis are: CO, NO, NO_x and SO₂. It was concluded that the highest pollutants values ​​are recorded until the point when the catalyst comes into operation (when the gas temperature entering the catalyst is approx. 200 oC) and exhaust gas temperature is 40-50 oC. In order to accomplish a mathematical approximation of CO, NO and SO₂ in function of exhaust gas temperature, logarithmic approximations and polynomial regressions were used. The curves resulted from the mathematical model can be used to approximate the level of CO, NO and SO₂, for similar vehicles.

• Periodical: Applied Mechanics and Materials (Volume 555)
• Pages: 375-384
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.555.375
• Online since: June 2014
• Authors: Stelian Tarulescu*, Adrian Soica
• Keywords: Cold Start, Exhaust, Gas Analyzer, Gasoline, Pollutant, Temperature

References

[1] Andre´, J-M., Joumard, R., Modelling of cold start excess emissions for passenger cars. INRETS Report, No. LTE 0509, Bron, France, 239pp, (2005).

[2] Jean-Yves Favez*, Martin Weilenmann, Jan Stilli, Cold start extra emissions as a function of engine stop time: Evolution over the last 10 years, Atmospheric Environment 43 (2009) 996–1007.

DOI: 10.1016/j.atmosenv.2008.03.037

[3] Shivaji Bhandarkar, Vehicular Pollution, Their Effect on Human Heatlh and Mitigation Measures, Vehicle Engineering(VE) Volume 1 Issue 2, June (2013).

[4] FLUE GAS ANALYSER GA-21 plus, Operating manual, Madur Electronics, Vienna - Austria.

[5] Cofaru, C., Pollution legislation in road transportation, Transilvania University of Brasov, Romania, (2002).

[6] Boulter, P. G., Latham, S., Emission factors 2009: Report 4 - a review of methodologies for modelling cold-start emissions, published Project Report PPR357, June (2009).

[7] Tarulescu S., Tarulescu R., Soica A., Mathematical model of pollution compounds calculus in function of traffic capacity from urban areas, Procedings of the 1st WSEAS International Conference on Multivariate Analysis and its Application in Science and Engineering (MAASE 08), Istanbul, Turky, 27-30 May, (2008).

[8] Joumard R., Sérié E., Modelling of cold start emissions for passenger cars, INRETS report LTE 9931, Laboratoire Transports et Environnement, INRETS, case 24, 69675 Bron cedex, France, December (1999).