POSSIBILITY FOR IMPROVEMENT OF DOMESTIC TRACTOR DIESEL ENGINE EXHAUST EMISSION BY APPLYing EXHAUST GAS RECIRCULATION (EGR)

The results of the experimental research of EGR (Exhaust Gas Recirculation) effects on the direct injection diesel engine IMR DM 34/t are presented in this paper. The research of EGR system effects on the course and change of the basic toxic components in the exhaust gases of diesel engine (NOx, HC, CO and smoke) are included, as well as the specific effective fuel consumption, depending on the quantity of the recirculated gases, engine speed and engine load. By applying the EGR system on the considered engine, it is possible to achieve very high nitrogen-oxides reduction degree with a certain increase of the engine smoke quantity. Unburned HC and carbon monoxide CO emissions also increase and generally follow the smoke ability increase course.