Abstract
The paper discusses the investigations on combustion engines that aim at the evaluation of the influence of engine design modifications on the exhaust emissions under application of lubricants of different physicochemical parameters. In the engines the authors applied laser treated cylinder liners, piston rings of reduced pressure force on the cylinder liner and optimized the assembling clearances in the slide bearings. The research was carried out in accordance with the ESC and ELR compliant procedures using different engine lubricants. The measurement series were performed for diesel engines of the capacity of 1.3 dm3of the power outputs of 51 kW and 66 kW. The tested objects were fitted with aftertreatment systems (oxycat and DPF filter).
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