Utjecaj baznih ulja i aditiva na svojstva motornih ulja za podmazivanje

undergraduate thesis

• Title (english): Influence of base oils and additives on the properties of engine lubricating oils
• Author: Ivan Štefanac
• Mentor: Davor Ljubas (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Kontinuirani razvoj tehnologije omogućio je pojavu sve složenijih strojeva koji zahtijevaju pravilno održavanje. Strojni dijelovi postaju sve manji i kompleksniji, uz visoku preciznost izrade, koji se u radu izlažu visokim naprezanjima pa je izbor odgovarajućeg maziva od izuzetnog značaja. Tribologija kao multidisciplinarna znanost, koja se bavi fenomenima trenja i trošenja, tako ima sve veću ulogu u pronalaženju optimalnih kombinacija maziva i aditiva. Predmet ovog završnog rada je ispitati kako bazna ulja i aditivi utječu na svojstva motornih ulja za podmazivanje. Navedene su osnovne klasifikacije i specifikacije motornih ulja te njihove razine kvalitete. Laboratorijskim ispitivanjem usporedilo se nekoliko vrsta motornih ulja, odredili ključni parametri i njihove međusobne razlike. Također je ispitano koliko motorno ulje degradira s obzirom na vrijeme eksploatacije i broj prijeđenih kilometara. Na tržištu diljem svijeta danas postoji mnoštvo raznih specifikacija motornih ulja pa se većina ljudi teško snalazi prilikom odabira odgovarajućeg motornog ulja za njihov automobil, motocikl ili neki drugi stroj. Ovim radom pokušalo im se olakšati i zato se daju osnovne smjernice za odabir odgovarajućeg motornog ulja i prikaz njihovih međusobnih razlika.

Abstract (english)

The continuous development of technology has enabled the emergence of increasingly complex machines that require proper maintenance. Machine parts are becoming smaller and more complex, with high precision manufacturing, which are exposed to high stresses in the work, so the choice of the appropriate lubricant is extremely important. Tribology as a multidisciplinary science, which deals with the phenomena of friction and wear, thus has an increasing role in finding optimal combinations of lubricants and additives. The subject of this final paper is to examine how base oils and additives affect the properties of engine lubricating oils. The basic classifications and specifications of engine oils and their quality levels were stated. Several types of engine oils were compared with laboratory testing, key parameters and their differences were determined. It was also examined how much engine oil degrades with respect to the time of exploitation and the number of kilometers traveled. There are many different specifications of engine oils on the market around the world today, so most people find it difficult to choose the right engine oil for their car, motorcycle or other machine. This work has tried to make it easier for them and therefore provides basic guidelines for choosing the right engine oil and an overview of their differences.

• Keywords: motorno ulje; bazno ulje; aditivi; klasifikacije motornih ulja
• Keywords (english): engine oil; base oil; additives; classification of engine oils
• Language: croatian
• URN:NBN: urn:nbn:hr:235:297163
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2023-09-24
• Created on: 2021-09-29 17:34:52