Cold Engine’s Operating Regime Influence over the Exhaust Emissions

This paper presents a study regarding the emissions caused by the running of a cold engine and studies the influence of the four-stroke gasoline engine’s temperature on CO2, CO, HC emissions. Experimental research has been done for three light vehicles equipped with a 1390 cm3 Renault spark ignition engines. Several test have been made under different temperature conditions by using a BEA Emission Analyser - Bosch. The experimental data have shown that the engine’s temperature has an influence on CO2, CO, HC emissions. The results show that the highest pollutants values are recorded for low exhaust gases temperature and for cold engine’s running regime.