This thesis is focused on the determination of the temperature dependence of automotive engineoils with different viscosity class. The first part of the thesis describes the individual functions, properties and composition of engineoils which it is possible to meet the automotive industry. Experimental part deals with temperature dependence density and viscosity of five new engine oils and one used engine oil with the same specification as one of the new oil. The four oils are classified with synthetic base and one with mineral base. The viscosity measurement was carried out using digital rotary viscometer Brookfield DV2T LV and the density measurement was carried out using a digital densitometer Densito 30 PX. As expected, the values of shear stress, dynamic viscosity, kinematic viscosity and density decreased with increasing temperature. Temperature dependence of density and viscosity of oils was modelled using an exponential function, in which were subsequently evalued coefficients of determination R2.
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:362678 |
| Date | January 2016 |
| Creators | Piták, Jan |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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