VEHICLE POLLUTION FOR COLD ENGINE FUNCTIONING

This paper present a study regarding the emissions produced at the engine cold start. 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 two light vehicle, Dacia Sandero 1.4 liter SIE and Dacia Logan 1.5 liter CIE. There were been made several tests, in different temperature conditions, 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, NO2 and SO2. It was concluded that the highest pollutants values are recorded until the point when the catalyst sistems comes into operation and exhaust gas temperature is 40-50oC for SIE and 35-40oC for CIE. Keywords— Cold, Air, Pollution, Diesel, Spark Ignition Engine.