Although combustion engines are not occupying the first place of environmental polluters globally, from the local perspective they are undoubtedly the most important. That is why their side environmental effects are very closely monitored and there is an increasing pressure to minimize them. The issue of pollutants in exhaust gases is discussed in this diploma thesis, which is focused on diesel tractor engine. Theoretical part includes a detailed analysis of emissions of diesel engines, discusses European emission limits of tractor's engines and possible design of technical devices to reduce pollutants in exhaust gases. Experimental part deals with evaluation of influence of shape of combustion chamber on emissions of a diesel engine Zetor Z1605. This part also includes a detailed description of measurement methodology, NRCS cycle and used measuring devices. The measurement was performed at the workplace of Research and Development of Zetor Tractors a.s. company.

No description available.