CRO TUNING

utorak, 23.01.2007.

KARBURATOR ILI INJEKTORI?

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Nekad davno svi automobili su imali karburator. Nije bilo izbora! Tada nisu postojali injektori, već nekoliko različitih metoda mehaničkog ubrizgavanja i posebnih sistema za trkaće automobile, no to sve se nije primjenjivalo na cestovna vozila.
Karburatori funkcioniraju začuđuje dobro usprkos njihovoj izvedbi. Kroz niz godina doživjeli su razne promjene. Imaju neke vrlo velike prednosti u odnosu na injektore, koje su vrlo značajne za ljude koji se bave tuningom.

Prednosti:
- Jeftin, jednostavan princip rada, lagan
- Mlaznice se lako zamijenjuju što pridonosi karakteristikama ubrizgavanja.
- Nema nikakve elektronike.
- Može se vrlo lako primjeniti s jednog motora na drugi.
- Bolji odziv na paučicu gasa.
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Nedostaci:
- Može doći do smrzavanja.
- Nemaju preciznu kontrolu miješanja zraka i goriva kao injektori.
- U ljetnim mjesecima gorivo može ishlapiti ili se vrlo jako ugrijati te tako otežati paljenje.
- "Venturijeva" teorija ograničava protok zraka što rezultira smanjenjem maksimalne snage

Injektori su u današnje vrijeme gotovo u svakome automobilu novije proizvodnje. Najveći razlog tome jest zakon o emisiji štetnih plinova koji zahtjeva katalizator. Stoga su se oni vrlo brzo proširili po čitavoj automobilskoj industriji, no nažalost nisu se mogli "uklopiti" sa karburatorom. Naime, karburator ne može postići vrlo preciznu smjesu (zraka i goriva) kao injektori, pa je uvijek bogatija smjesa prolazila katalizatorom i uništavala ga. Primjenom moderne elektronike u automobilima te pomoću injektora mogla se je dobiti zadovoljavajuća smjesa.

Prednosti:
- Bolja smjesa;
- Nije potreban čok;
- Pouzdanost;
- Nema smanjenja maksimalne snage kao kod karburatora.



Nedostaci:
- Kompliciranost;
- Manje mogućnosti za prilagođenje;
- Promjena injektora je nemoguća;
- Uz injektore je potrebna i elektronika, pumpa za gorivo, regulator itd.
- Manja mogućnost pronalaska kvara.

Poznatiji proizvođači karburatora su: Weber, Dellorto, Holley, SU, Pierburg, Mikuni, Stromberg, Bing, Solex, zenith i Edelbrock. Neke od navedenih proizvođača danas prizvode i injektore.

23.01.2007. u 16:42 • 0 KomentaraPrint#

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