20.500.12556/RUL-189618 Vpliv dolžine zapiranja grelca grelnih svečk za dizelske motorje na njegove karakteristike The influence of glow plug heating element closing length on its characteristics Nastavitev dolžine zapiranja grelca grelne svečke se v proizvodnji trenutno določa izkustveno, brez podatkov o njenem dejanskem vplivu na delovanje svečke. V okviru diplomske naloge smo zato obravnavali vpliv dolžine zapiranja grelca grelne svečke za dizelske motorje na njeno delovanje. Testirali smo pet dolžin zapiranja (5, 8, 11, 14 in 17 mm) na 150 grelcih. Analizirali smo dimenzije, upornost in žarilne lastnosti pred in po nadaljnji proizvodni obdelavi. Z rentgensko analizo smo preverili notranjo zgradbo izbranih vzorcev. Rezultati kažejo, da dolžina zapiranja opazno vpliva na dolžino grelca in na njegove žarilne karakteristike. Nastavitvi 14 mm in 17 mm izstopata kot najprimernejši za uporabo v proizvodnji – 14 mm je dimenzijsko najbolj stabilna, 17 mm pa funkcionalno najbolj stabilna. Rentgenska analiza je pokazala, da razlike v žarilnih karakteristikah grelca večinoma povzroča dolžina navitja grelnega upora. The closing length of the glow plug heating element is currently determined empirically in production, without data on its actual effect on glow plug performance. As part of this thesis, we therefore investigated the effect of the closing length of the heating element tube glow plug performance for diesel engines. We tested five closing lengths (5, 8, 11, 14 and 17 mm) on 150 heating elements. We analysed dimensions, resistance, and glow characteristics before and after further production processing. X-ray analysis was used to verify the internal structure of selected samples. The results show that the closing length has a noticeable effect on the length of the heating element and on its glow characteristics. The 14 mm and 17 mm settings stand out as the most suitable for use in production - the 14 mm setting is the most dimensionally stable, while the 17 mm setting is the most functionally stable. X-ray analysis showed that differences in glow characteristics are mostly caused by the length of the heating resistor winding. rotacijsko kovanje grelne svečke hladno preoblikovanje dolžina zapiranja grelni upori rotary swaging glow plug cold forming closing length heating resistor true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2026-10-10 08:30:37 2026-10-10 08:30:41 2026-10-11 04:30:02 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 294279 51131.pdf 51131.pdf 1 34C6F898E32E536B729705F0BB563CF0 485007666a6d65b157cf1b33312b68c8bf2fd81c46c9eec235e56d9bf0b1e3df f683f8ad-c473-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=250282 Fakulteta za strojništvo 0 0 0