Re: Opel Astra Classic II 1.4 14v VS Dacia Logan 1.4 8v
 

De fapt aici tu le-ai facut varza:-)
Twinport nu are nicio legatura cu supapele ci cu admisia, si anume este admisie variabila; nu am acum dispozitia necesara pentru explicat asa ca fac un copy paste cu ce gasesc pe net:
"Features EGR valve and TwinPort variable intake geometry - twin intake ports with a choke closing one of the ports at low RPM, providing strong air swirl pattern for higher torque levels and better fuel economy. The drive belt for the camshafts is wider and stronger than before, and water pump is not driven by it anymore which improves reliability. Turbocharged versions exist." - in cazul meu in loc de curea e vorba de lant

Iar cat despre injectie din nou un copy paste:
"Since the nature of fuel injection dispenses fuel in discrete amounts, and since the nature of the 4-stroke engine has discrete induction (air-intake) events, the ECU calculates fuel in discrete amounts. In a sequential system, the injected fuel mass is tailored for each individual induction event. Every induction event, of every cylinder, of the entire engine, is a separate fuel mass calculation, and each injector receives a unique pulse width based on that cylinder's fuel requirements."
"Multi-point fuel injection injects fuel into the intake port just upstream of the cylinder's intake valve, rather than at a central point within an intake manifold. MPFI (or just MPI) systems can be sequential, in which injection is timed to coincide with each cylinder's intake stroke; batched, in which fuel is injected to the cylinders in groups, without precise synchronization to any particular cylinder's intake stroke; or simultaneous, in which fuel is injected at the same time to all the cylinders. The intake is only slightly wet, and typical fuel pressure runs between 40-60 psi.
Many modern EFI systems utilize sequential MPFI; however, in newer gasoline engines, direct injection systems are beginning to replace sequential ones."

Re: Opel Astra Classic II 1.4 14v VS Dacia Logan 1.4 8v
 

Cauti degeaba explicatii pe google, sistemul de injectie de pe logan este tot secvential ca si pe astra
iar termenul de injectie clasica, cum ai folosit tu, nu prea exista. exista injectie simultana (toate injectoarele pulverizeaza in acelasi timp, exemplu cielo primele modele), injectie in grup 2 cate 2 injectoare, si secventiala..despre twinport ai dreptate http://cdn2.worldcarfans.co/2004/7/m...715.002.1M.jpg explicatia

Re: Opel Astra Classic II 1.4 14v VS Dacia Logan 1.4 8v
 

Caut pe google ca sa dau ceva informatii concrete, ca prea sar multi sa contrazica.

Cauta pe Carfolio (daca tot suntem in tema) si ai sa vezi la Logan 1.4 8v sistem de injectie "mpfi" si la Astra "smpfi".

Pana la urma in orice injectie multipunct nu toate injectoarele baga benzina in acelasi timp (evident), dar la secventiala e vorba de ce cantitate de benzina da un injector la un moment dat in comparatie cu restul.

Edit 2: injectia "2 cate 2" este injectia multipunct clasica de pe Logan.

Re: Opel Astra Classic II 1.4 14v VS Dacia Logan 1.4 8v
 

https://img151.imageshack.us/img151/1...ielogan.th.jpg

AI o informatie eronata..

Re: Opel Astra Classic II 1.4 14v VS Dacia Logan 1.4 8v
 

Mda, asa e, in cazul asta retrag ce-am spus si nu ma mai bazez pe Carfolio, despre care credeam ca au informatii destul de sigure:-)

Re: Opel Astra Classic II 1.4 14v VS Dacia Logan 1.4 8v
 

Asta s-o crezi matale. Injectia multipunct este prezenta inca de la supernova. Daca ar functiona 2 cate 2, ar avea galerie comuna doua cate doua si nu ar avea 4 ci 2 injectoare, asa cum la monopunct este un singur injector.

Off: Ce-mi place ca la bmw nu simt nevoia sa treaca pe spate particularitatile motorului, nici n-ar fi loc sa treaca: crdi, twinport,16v, turbo, sau: mp direct injection, dublu vanos, 24v, etc