DETERMINATION OF ENVIRONMENTAL PERFORMANCE OF A DIESEL ENGINE IN PRODUCTION CONDITIONS

Internal combustion engines installed on agricultural machinery, as well as on transport and stationary installations, are subject to mandatory examination by competent institutions and organizations to confirm compliance with the standards in force in the country. However, circumstances may arise in the technological process of production when it becomes necessary to determine the level of environmental performance of the engine directly at the enterprise. In this case, the studies must be carried out in a short time and with minimal costs. The data and features of the norms currently in force in Ukraine are presented, which take into account a comprehensive approach to the implementation of European requirements for pollutant emissions from agricultural and forestry vehicles and are designated by the environmental classes "Stage". To determine the level of environmental indicators in production conditions using the example of research on the engine of an agricultural tractor intended for operation in Ukraine, a methodology has been proposed, which is based on the analysis of the current regulatory documentation regulating the emissions of harmful substances with exhaust gases of engines, the generalization of the data of the performed research and tests carried out directly in production conditions, the analysis of the influence of design and chemical factors, the operating mode of the diesel engine on the emission indicators of harmful substances with exhaust gases. The object of the study was the WP6T180E200 diesel engine, which is intended for installation on the KhTZ-159K.010 tractor of category E and is widely used in Ukrainian agriculture. The assessment of the level of environmental performance of the engine for compliance with the established requirements was carried out taking into account and generalizing the change in mass emission of harmful substances characteristic of engines of this purpose depending on the load for the nominal crankshaft speed, the speed corresponding to the maximum torque and the minimum idle mode. In studies on determining the environmental performance of a diesel engine in production conditions, an analogy method was proposed, which is based on the presence of characteristic features in the studied object, corresponding to the features of the object chosen as an analogue. The methodology and results of the performed calculation and experimental studies are presented. An assessment is given of the compliance of the environmental performance of the engine with the standards in force in the country.