Outline · [ Standard ] · Linear+ Logan 1.5 vs 1.6

Motorul e twinport cu 16v. Pana la 3000 rpm sunt deschise doar 8v iar peste aceasta turatie se deschid si celelalte.

Motorul e twinport cu 16v. Pana la 3000 rpm sunt deschise doar 8v iar peste aceasta turatie se deschid si celelalte.

la cat te miri sa inteleg ca asta e tehnologie SF pentru reno-isti? pentru ca la Opel exista de 7 ani.

Eu cred ca initiatorul n-a citit 50% din cele scrise aici.

This post has been edited by Arhimede: 29 Apr 2009, 11:43

Esti optimist.

Acum sa nu spuneti ca pentru el ati scris atat.

Ce ma mira e altceva: e atata lume pe aici care "viseaza" viitoarele modele de Logan si alte chestii despre care nu auzim prin ziare decat peste cateva saptamani

 

E offtopic da sa nu zica lumea ca s nebun!
"Twinport" - Variable Intake Control for Low Fuel Consumption
Opel adopts new economical technology for small-displacement gasoline engines

Fuel-saving potential close to gasoline direct injection
Smart solution makes useful technology affordable
Ready for production this year

Rüsselsheim. With an innovative variable intake control system called "Twinport", Opel plans to reduce the fuel consumption of small gasoline engines (up to a maximum size of 1.6 liters) by as much as six percent. The smart solution employs a variable intake manifold in combination with a high rate of exhaust gas recirculation. The "Twinport" technology works in conjunction with engines with four valves per cylinder, a requirement fulfilled by Opel's complete ECOTEC range.

"Twinport" controls the supply of the fuel-air mixture to the cylinders according to the engine's actual needs. At part load, one of the two intake ports leading into the cylinder is throttled. This causes an intensive swirl effect to develop as the mixture enters the cylinder, which in turn makes the engine more economical when operating with a high proportion of recirculated exhaust gas. At full load, on the other hand, the throttling device is opened, the cylinder receives a greater charge of mixture and full power is developed. By adapting the swirl movement of the incoming charge to suit engine operating conditions, maximum fuel economy is always achieved.

"One of the advantages of the "Twinport" technology is that the proven intake-port fuel injection system and the principle of exhaust emission control by three-way catalytic converter can be retained," explains Hans H. Demant, Opel's Executive Director, Engineering. "This limits the extent of the technical modifications and in turn makes it possible to offer our customers this technical development at an affordable price. For this reason we regard variable intake control as an intelligent approach to the task of reducing fuel consumption on small gasoline engines." Extensive tests carried out by Opel Powertrain's experts have confirmed that these smaller engines, if equipped with "Twinport", can achieve at least 80 percent of the fuel savings expected from an engine using gasoline direct injection and the stratified-charge principle.

The gasoline engine's relative weakness in fuel consumption compared to diesel units is due largely to throttling losses. The easiest way of minimizing these losses is by increasing the amount of exhaust gas in the fuel-air mixture - in other words exhaust from preceding combustion cycles is recycled back into the combustion chambers and blended into the fresh mixture. However, in order to maintain rapid, stable combustion at high rates of exhaust gas recirculation, charge movement must be intensified. This is precisely what Opel's engineers have achieved with their variable intake control system: at partial load one of the two intake ports to each cylinder of the four-valve engine is partly blanked off by closing a throttle just before the mixture reaches the intake valve. As a result, the mixture enters the cylinder at an angle. This creates a swirl effect around the cylinder axis and ensures that combustion takes place reliably and completely. If the driver calls for full power from the engine, however, the second intake port is re-opened fully to make sure that the maximum mixture charge enters the cylinder.

For successful use of the shutdown principle, the intake ports and the mixture formation process before and after entering the cylinders had to be optimized. To achieve this, Opel's engineers made simultaneous use of computer-based flow simulation and video observations on actual engines. The outcome of their efforts: the modified engines reduced the car's fuel consumption by six percent when put through the standard test cycle.


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intr-adevar imi cer scuze nu eram suficient de documentat, inainte sa postez am cautat si eu pe google, dar am citit asa la foc rapid, si ma uitam dupa cifre exacte, adica ceva de genul cum ai zis tu la turatia x ....... intre timp mi-a explicat si argon cum sta treaba.

scuze de off

@dariusz avand in vedere ca initiatorul detine o solenza, cred ca stie cum se comporta motorul de 1.4.

adica vrei sa zici ca dsn , solenza 1.4 , si logan 1.4 sint masini care merg la fel ? doar pentru ca au aceeasi capacitate cilindrica si aceleasi puteri ?
da-mi voie sa iti raspund-- te inseli !

nu merg la fel stiu si eu din proprie experienta. este o diferenta foarte mare intre supernova si solenza (logan 1.4 nu am condus), dar motorul are cam aceeasi parametrii, si la baza e unul si acelasi motor. ca una e mai sprintena, ca sta mai bine pe sosea, ca alta consuma mai putin, etc, asta tine si de alte componente.

...e aici o chestie hilara care de fapt tine de "arta manipularii" si de spiritul de turma....nici nu conteaza cat de specialisti suntem noi pe aici, daca majoritatea e alarmata de ceva atunci asa si e  ...totusi daca diesel-ul e asa prost, de ce se cumpara si vand atatea?

Pentru ca romanul prefera sa dea mii de euro in plus, nu conteaza ca ii da degeaba, sau ca nu-si va recupera in veci banii aia, dar sa vada el consum mic acolo, ca face bine la psihic.

Dupa ce am citit topicul asta...... naspa dieselul asta, mai si eram multumit de el pana sa citesc. Cred ca am sa-l vand, acum trebuie sa deschid iar topic cu "ce masina sa-mi iau in loc de logan dci?" 

La tine macar vad ceva kilometri facuti, chiar te folosesti de masina, dar sa vezi 6 mii de km facuti in 2 ani, si sa-ti iei diesel...

La mana a doua nu as lua diesel (daca as lua, in primul rand), nici sa ma impusti. N-ai de unde sa stii de unde a bagat respectivul motorina. Economia aia de 2 litri de carburant la suta de kilometri se duce instantaneu pe apa sambetei la un schimb de injectoare de 6000 ron.

Ar mai fi o categorie de oameni la care intr-adevar renteaza dieselul: cei care tracteaza diverse atelaje, precum remorci sau rulote. Pe ei nu-i contrazic, aici intr-adevar se simte diferenta.

....... intre timp mi-a explicat si argon cum sta treaba.

io stiu ca argon ii economist, da daca tu te lasi pe mana lui in ale motoarelor e treba ta

nu-i problema ca eu o sa devin finantist, deci ne intelegem

Finante-Banci la Ase Bucuresti cumva?

nu-i problema ca eu o sa devin finantist, deci ne intelegem 

Gizas. Nu ne-a ajuns pana acuma un expert in motoare, de acum o sa avem doi. Vai de DaciaClub.

go away

la cat te miri sa inteleg ca asta e tehnologie SF pentru reno-isti?  pentru ca la Opel exista de 7 ani.

Si la fiat de 16.
Si in rezumat: ia-ti diesel doar daca faci kilometri multi si il iei de nou, cu garantie. Altefel e mai ieftin per total un MPI.

This post has been edited by einstein1984: 30 Apr 2009, 09:20

Nu lua diesel, o prestigioasa universitate americana a descoperit ca pe langa pilitura dieselul e predispus si la gripa porcina.

cine te pune sa il pupi ca sa te imbolnavesti?

Finante-Banci la Ase Bucuresti cumva?

cum ai ghicit??

Gizas. Nu ne-a ajuns pana acuma un expert in motoare, de acum o sa avem doi. Vai de DaciaClub.

ha ha ce am mai ras

te-am simtit, si eu la fel.

Cine se aseamana se atrage.

bâşti!