A continuous measurement of CO, CO2, HC and NOx at the work of a combustion engine fed with petrol in unstable thermal conditions

The presented article introduces problems concerned with exhaust emission, produced at the work of a combustion engine fed with petrol in unstable thermal conditions after a cold starting in low temperature. It also shows the possibilities of using a diagnostic fume analyzer type NDIR, adapted for taking continuous measurements and connected to a PC class computer, for measurements of toxic fumes contents emissions during the work of an engine in changeable conditions. The results of the measurement present the concentrations of carbon monoxide, carbon dioxide, nitrate oxides and hydrocarbons as well as an engine’s rotational speed for a cold starting in ambient conditions. Enhanced emissions of CO, CO2, HC and NOX can be observed in the first few minutes of work. In the first part of the period the emissions of the above-mentioned contents are exceptionally high.