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MEHANIČKI KONCEPT MOTORA SA UNUTRAŠNJIM SAGOREVANJEM
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2424
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Klip
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Komora za sagorevanje
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Podmazivanje komore
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Ponovo podmazano i...
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Karter s uljem
Radilica
Klip
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Princip: uljna pumpa podmazuje radilicukoja podiže i spušta klip
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Zašto klip treba da bude dobro podmazan:Ovim se smanjuje naprezanje između dva sloja mazivnih tečnosti. Sila trenja jednaka je energijikoja se rasipa kretanjem molekula kroz tečnost koja se ne lepi.
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Princip rada:Motor je zatvorena kutija u kojoj ima više rupa koje se nazivaju cilindri kroz koje se kreću klipovi.Ovo kretanje kroz cilindar gore-dole dovodi do kretanja radilice ukrug koja svoje kretanje prenosina menjač koji, opet, pokreće točkove.
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Četvorotaktni motor:Gorivo dolazi na vrh cilindra gde se meša sa vazduhom koji dolazi iz karburatora.Ovo je prvi takt – USISAVANJE.
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Eksplozivna smeša je sada na vrhu cilindra, u komori za sagorevanje. Klip, krećući se, sabijamešavinu. Ovo je drugi takt – SABIJANJE (KOMPRESIJA).
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U jednom trenutku svećica proizvodi varnicu koja dovodi do eksplozije sabijene mešavine.Ovo je treći takt – EKSPLOZIJA (SAGOREVANJE).
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Klip je sada silovito odbijen. Gasovi od eksplozije se izvodevan motora. Ovo je završni, četvrti takt – IZDUVAVANJE.
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Raspodela s 4 ventila
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Direktno ubrizgavanje: JTD , TDI , HDI...
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Radilica
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MOTOR
TURBO-KOMPRESOR
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Princip rada turbo punjača:Dva točka na istoj osovini, jedan pokretanizduvnim gasovima a drugi vazduh ilimešavinu ubacuje u cilindar...
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... što, za uzvrat, dovodi do boljeg punjenja komore za sagorevanjesmešom vazduha i goriva
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Pre pronalaska turbo punjača bio je potrebanveći broj cilindara u motoru
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Princip direktnog ubrizgavanja:Mešavina se ubrizgava direktno u cilindar. Direktno ubrizgavanje se obavlja pumpomvisokog pritiska. Ograničenje ovog sistema je da se ubrizgavanjem dolazi u kontaktsa sagorevanjem. Zato je potrebno imati brizgaljku koja to može da izdrži.
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Povećanje zapremine motora: 4-linijski motor
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Hladnjak
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Ulaz u komoru za sagorevanje