Sprememba reoloških lastnosti motornega olja

Kondić, Luka (author), Lukšič, Miha (mentor)

Motorno olje je zelo pomembna tekočina, potrebna za delovanje motorjev z notranjim zgorevanjem, saj ima poleg podmazovanja notranjih delov tudi veliko drugih funkcij, kot so hlajenje, čiščenje, tesnjenje, zaščita pred korozijo itd. Ena izmed pomembnejših lastnost motornega olja je viskoznost. V okviru diplomske naloge sem z rotacijskim viskozimetrom določeval viskoznost šestih motornih olj pri 25 °C in 40 °C. Na osnovi teh meritev sem ocenil viskoznost danega olja pri 100 °C. Primerjal sem viskoznost originalnega olja ter olja, ki je bilo staro (rabljeno). Viskoznost olja je bila odvisna od same gradacije olja in znamke (proizvajalca), temperature kot tudi obrabe olja zaradi delovanja motorja.

• Language: Slovenian
• Keywords: Motorno olje, viskoznost, podmazovanje, temperatura, staranje
• Work type: Bachelor thesis/paper
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2024
• PID: 20.500.12556/RUL-161950
• Publication date in RUL: 17.09.2024

Secondary language

• Language: English
• Title: Changes in the rheological properties of engine oil

Abstract

Engine oil is a very important fluid needed for the operation of internal combustion engines, as it has many functions other than lubricating the internal parts, such as cooling, cleaning, sealing, corrosion protection, etc. One of the most important properties of engine oil is viscosity. In the framework of my thesis, I used a rotational viscometer to determine the viscosity of six engine oils at 25 °C and 40 °C. Based on these measurements, I estimated the viscosity of a given oil at 100 °C. I compared the viscosity of the original oil and that of the old (used) oil. The viscosity of the oil depended on the oil gradation itself and the oil mark (manufacturer), the temperature as well as the wear of the oil due to engine operation.

• Keywords: Engine oil, viscosity, lubrication, temperature, ageing