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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Provozní degradace motorového oleje v zemědělské technice
 Řezníček, Ladislav
This thesis focuses on the description and detection of service degradation of engine oil in agricultural technology. The first part is an introduction to lubricants. Followed by an overview of the classification of motor oils according to their composition and viscosity. In other chapters the thesis deals with the the issue of lubrication of internal combustion engines and further clarification of the causes of penetration of wear particles in the engine. The experimental part of the work examines the motor oil used in the tractor Zetor. Oil samples were taken at intervals of 50 hours . In the beginning there are described the methods and appliances used to determine parameters of the samples . Final results are processed and show in charts. Their valuesdetermine the coefficients of determination R2. A total of eight samples of engine oil MADIT M7 ADS III were used. Seven of the samples were taken from the oil tank of the tractor and one sample was brand new. For these samples the chemical composition was examined as well as the amount of wear particles in the oil . Furthermore, the density and dynamic viscosity were meas-sured. Kinematic viscosity was calculated based on these two parameters. The state of degradation of engine oil was finally determined from all of these results.
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Provozní kapaliny motorových vozidel
 Řezníček, Ladislav
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See also: similar author names
2 Řezníček, Libor
2 Řezníček, Lukáš
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