Evolutia TDI-ului

Cred ca articolul de mai jos reprezinta un raspuns pertinent la toti cei care in diferite posturi carcoteau aiurea despre cat de lipsiti de inovatie sunt cei de la Audi in ceea ce priveste diesel-ul.
Am subliniat cateva pasaje interesante:

"Audi first introduced their Turbo Direct Injection (TDI) technology in 1989. Today half of all Audi's sold worldwide come with a TDI engine, but for a long time now in the US the TDI has not been offered as an option. Starting with the 2009 model year that will change with Audi introducing a new TDI engine to the Q7 and A4 in the US. We recently had a chance to drive an A5 with the 3.0-liter TDI equipped with Audi's new Ultra Low Emission System (ULES) that will be the initial diesel option in the United States.

Initial Driving Impressions

Having not driven a TDI in a long time, I was initially expecting significant differences in how the A5 would drive. I remember the TDI fondly, but as still distinctly diesel.

Our journey started on the highway out of the city. The engine didn't seem all that remarkable initially. That was until I realized that in itself was remarkable. The engine was quiet. It sounded like Audi's gasoline engines, albeit with a slightly lower pitch thanks to the TDI's 4600 RPM redline.

The power was spectacular, thanks to the mounds of torque the 3.0 TDI provides. Passing on the highway was trivial with no noticable turbo lag. However, we did notice some turbo lag from a dead stop but only when a bit heavy with the foot. Our casual driving around town felt very smooth.

While we didn't get a chance to do formal 0-60 runs, the car felt a bit quicker than even the S5. Indeed, the TDI 3.0-liter has 406 pound-feet of torque, versus the 325 pound-feet of torque in the S5.

50 State Legal

The 3.0 TDI ULES is the world's cleanest diesel engine. Not only that, it is legal in all 50 states, including California, Massachusetts, Maine, New York and Vermont which have had the strictest emissions requirements.

Audi managed this feat thanks to a combination of new technologies. A new common rail system with piezo injectors was developed. With piezo injectors, the number of injection processes per cycle can be varied and optimized. This reduces emissions and ensures a smoother combustion process, which also helps the engine run quieter.

AdBlue

The most significant improvement was the reduction in nitrous oxide emissions. AdBlue, a 32.5 percent urea liquid solution, is sprayed into the DeNox catalytic convertor. Together with the hot exhaust gas, the solution breaks down into ammonia, which the nitrous oxide in the exhaust then splits into nitrogen and hydrogen. The system reduces nitrous oxide emissions by up to 90 percent.

The AdBlue container is filled via the fuel tank flap, just like the fuel tank. The extremely efficient use of the AdBlue solution allows one fill to last between service appointments. Audi will fill up the AdBlue tank at each service appointment, without requiring you to worry about it.

Conclusion

The extremely refined driving characteristics of the new TDI, the superb fuel mileage of diesel, and the very clean ULES technology makes the choice between gasoline and diesel down to one of price and availability."

sursa:
http://www.audiworld.com/news/08/tdi-ules/

 

Da, foarte tare arrticolul
Chiar asa e, multi vorbesc din amintiri sau barfe auzite la coltul strazii fara sa se documenteze in prealabil.

 

Foarte interesant articolul! Sper sa-l citeasca cat mai multi, ma refer aici si la non membrii!

 

da foarte impresionant dar uite ceva care a luat si ceva premi check this out http://www.carpages.co.uk/audi/audi-car-security-10-06-06.asp citeste ENGINE OF THE YEAR AWARD FOR TURBO FSI UNIT.acesta deja exista cit despre articolul tau aceasta tehnologie se va aplica din 2009.hai sa vorbim de ce este deja pe piata nu prototipuri

 

Audi a castigat in 2007 cursa de la Le Mans .
Pentru anul 1990 TDI chiar a fost o lovitura pentru industria auto.
... eu sunt unii dintre carcotasi,insa nu uita suntem in anul 2008,totul este la
stadiul declarativ.
Am curajul sa spun inca o data Pompe-duse a fost doar un upgrade la tdi .
Am o intuitie ca pe noile motoare vor lua ceva de la common-rail

 

Daca ai fi citit inainte probabil ai fi observat fraza asta:

Audi managed this feat thanks to a combination of new technologies. A new common rail system with piezo injectors was developed. With piezo injectors, the number of injection processes per cycle can be varied and optimized. This reduces emissions and ensures a smoother combustion process, which also helps the engine run quieter.

TDI nu inseamna PD

si ... UN DRIVE TEST NU ESTE DELOC STADIUL DECLARATIV ...
asa ca ramai in continuare unul din carcotasii care fac polemica de dragul polemicii ... :P

 

Este recunoscut ca TDI-pompe duse este una din evolutiiile tdi-ului .
Este posibil ca in urmatrii 5-7 ani tdi-urile sa fie istorie.
Nimeni nu a spus ca Audi nu va dezvolta si dezvolta noi motoare mai performante.
Ceea ce cred ca se vor dezvolta foarte mult sunt TFSI-urile cu aplicabilitate pe benzina si motorina.
Ia-o doar ca o parere,nimeni nu are acum dreptate timpul ne va demonstra.

 

Cred ca evolutia motoarelor nu va fi dictata de performantele dinamice, ci mai degraba de costurile de productie si de norma de poluare.
Motoarele common-rail sunt mai ieftin de produs dar mai scumpe in expoatare. Se face un transfer al costurilor de la fabricant catre utilizaor, care nu cred ca va mai tine o masina mai mult decat perioada de garantie.