Abstract
The paper discusses the problem of compliance of diesel engines of agricultural tractors that are available on the Russian market with international environmental regulations and standards. Based on the data presented on the official websites of agricultural machinery manufacturers, an analysis of modern domestic and foreign tractors is performed. The performed studies allow concluding that in Russia there is a serious problem associated with the mismatch of agricultural tractors available on the Russian market with the of Stage and Tier global emission standards; 87 % of domestically produced agricultural tractors correspond to low emission classes (Euro 0, Euro 2, Tier 2, Tier 3); 78 % of the examined imported models of tractors from leading world manufacturers comply with emission classes below Tier 4. Methods for improving diesel engines towards reducing the amount of harmful substance emissions into the environment are described: adjustable turbocharging, aftercooling, partial exhaust gas recirculation, electronically controlled Common Rail, and exhaust gas purification and aftertreatment systems are used.
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