Development of real exhaust emission from passenger cars in Algeria by using on-board measurement

On-board measurements of unit emissions of CO, HC, NOx and CO2 were conducted on a sample of 17 private cars with different fuels, dual gasoline and LPG, single gasoline and diesel. The 298 tests have shown the effect of LPG injection technology on unit emissions and allowed to compare emissions to Artemis European model. Except for NOx, sequential multipoint injection LPG kit, without catalyst installed is the most efficient for all other pollutants. Particular test results on a subsample of LPG vehicles have shown that LPG fuel alone cannot compete with catalyzed gasoline and diesel vehicles. The advantages of LPG are quickly lost facing the high development of either gasoline or diesel engine technology and catalytic converter. LPG performance seems to be lower under real driving conditions than expected on chassis dynamometer.