VAG (Audi) - 3.0 V6 TFSI

[simonepietro]

è stato presentato al Mothor symposium a vienna ma i dati noti al momento sono pochi. Sarà disponibile in due livelli di potenza, la prima versione per la nuova A6 avrà 294 cv (290hp) e 420 Nm di coppia (310 Lb/ft) , la seconda con 354 cv (350 hp) sarà disponibile più avanti per la nuova S4, questa potenzialmente potrà essere presente a los angeles a novembre. Sembra che che la versione più potente sarà 45 kg più leggera dell'attuale v8 della s4.


Aggiornamento al 15/07/2008

Scritto in origine da simonepietro

News sulla versione da circa 290 cv .
cilindrata:2995cc
alesaggio:84,5 mm
corsa:89 mm
Peso: 189 kg
potenza: 290cv
coppia: 420 Nm costanti da 2500 a 4850 giri
Compressore volumetrico :velox max 23000 giri a cui corrisponde una portata massima di aria pari 1000 kg /ora , posizionato all' interno della V e a monte della farfalla ,2 intercooler aria -acqua in alluminio.
rapporto di compressione : 10,5 a 1
iniezione diretta a 150 bar di pressione, iniettori a 6 fori e possibilità di tre iniezioni per ciclo .
Basamento modificato e irrobustito.
Variazione di fase fino a 42 gradi.
euro 5
FONTE congress

Scritto in origine da simonepietro

The new 3.0 TFSI:
Hi-tech V6 with compressor supercharging


Compressor and direct injection – a compelling duo
213 kW (290 hp), 420 Nm and outstanding efficiency
Superb power from idle speeds up, spontaneous torque buildup

Powerful, spontaneous and ultra-efficient: this is the new top version in Audi's V6 engine range. The 3.0 TFSI develops 213 kW (290 hp) and a huge 420 Nm (309.78 lb-ft) of torque. It combines two state-of-the-art technologies in perfect style – gasoline direct injection and compressor supercharging. The hi-tech V6 will go into production later in the year.

The brand with the four rings has a long tradition of supercharged engines. The legendary Grand Prix racing cars built by Auto Union back in the 1930s already featured compressors, which coaxed as much as 440 kW (around 600 hp) out of the mighty 16-cylinder and 12-cylinder engines. From the late 1970s on, Audi focused its attention on the exhaust turbocharger, which helped it to a succession of noteworthy triumphs in the world of motor sport. It was at this time that Audi's turbo engines began to enjoy resounding market success.

The compressor is now staging a comeback. It is the ideal supercharging technology for the new three-liter V6, the 3.0 TFSI; the T in Audi engine designations consequently no longer exclusively denotes turbo versions.

Extensive comparative tests revealed the mechanical supercharger to be superior to a biturbo concept for this engine. In conjunction with direct injection, its packaging, starting performance and dynamic response were far superior.

The compressor is so compact that it easily fits inside the 90-degree V of the cylinder banks, in place of the intake manifold. Because it is driven by the engine via poly-V belt, its full thrust is available from idle speed upwards, producing huge pulling power when driving off. The 3.0 TFSI delivers its maximum 420 Nm (309.78 lb-ft) at only 2,500 rpm and maintains this constantly until 4,850 rpm.

The gas paths after the compressor are very short; this means that the torque is built up extremely quickly, even more dynamically than on a naturally aspirated engine of the same displacement. The 3.0 TFSI responds sportily to the throttle, with exceptional agility and bite. And it revs up to the maximum of 6,500 rpm with playful ease, achieving its rated output of 213 kW (290 hp) at just under 5,000 rpm.

Top marks for fuel efficiency

The 3.0 TFSI without question earns top marks for fuel efficiency, too. And its pulling power enables it to extend the transmission ratio, further adding to its already superior efficiency. The new 3.0 TFSI will achieve an average fuel consumption of well under 10 liters per 100 km (23.52 US mpg) in virtually all longitudinally engined Audi models, the concept for which it is envisaged. It is designed to run on either premium or regular gasoline and already complies with the future emission standard Euro 5 – a question of honor for every new Audi engine.

The Audi technology of gasoline direct injection according to the FSI principle was what made this trailblazing efficiency possible in the first place. Unlike conventional concepts, it allows the compressor to be located behind the throttle valve. In view of the low density of the intake air at loads below supercharging level and when coasting, its rotors are free-running and the amount of power required to drive them is low.

The engine's high compression ratio of 10.5:1 also plays a big part in its efficiency. The direct injection principle is once again the key, because the intensively swirled fuel cools the combustion chamber, reducing the tendency to knock.

The compressor of the new 3.0 TFSI is what is known as a Roots blower. Inside it, two four-vane rotary pistons counter-rotate at a speed of up to 23,000 rpm, with an air gap between them measuring just a few thousandths of a millimeter. The rotors can deliver 1,000 kilograms (2204.62 lb) of air per hour and force it into the combustion chambers at a boost pressure of up to 0.8 bar.

Two water-to-air intercoolers made from aluminum and connected to a separate coolant circuit are integrated into the housing. Here, the compressed and therefore heated intake air is cooled down again in order to boost its oxygen content for the combustion process. An extensive package of measures reduces the level of noise generated by the compressor to a minimum.

The engine itself belongs to Audi's family of ultramodern V engines. In addition to the standard cylinder angle of 90 degrees, their attributes include systematic lightweight construction – the three-liter version's crankcase, which is made from cast aluminum/silicon, tips the scales at just 33 kilograms (72.75 lb). The entire engine, including the compressor, weighs 189 kilograms (416.67 lb). The bore measures 84.5 millimeters (3.33 in) and the stroke 89.0 millimeters (3.5 in), producing a swept volume of 2,995 cm3.

Reinforcements on the crankcase

Audi has included a whole array of refined hi-tech features on the 3.0 TFSI. The crankcase has been adapted to the higher prevailing pressures and all components are frictionally optimized. The two intake camshafts can be adjusted through 42 degrees crankshaft angle. In the intake ports, tumble flaps induce movement in the incoming air to promote optimum mixture preparation.

The injection system is a fundamentally new design. A common rail system with six-hole injectors injects the fuel directly into the combustion chambers at a pressure of up to 150 bar. The injectors' highly dynamic response permits up to three fuel injections per operating cycle across an extensive range of the characteristic map. They, too, optimize the combustion process and therefore contribute to the impressive performance of the new 3.0 TFSI.

AUDI AG sold a total of 964,151 cars in 2007 and thus achieved its twelfth consecutive record year. With revenue of €33,617 million and profit before tax of €2,915 million, the company attained its best figures ever. Audi produces vehicles in Ingolstadt and Neckarsulm (Germany), Györ (Hungary), Changchun (China) and Brussels (Belgium). At the end of 2007, production of the Audi A6 started in Aurangabad, India. The company is active in more than 100 markets worldwide. AUDI AG's wholly owned subsidiaries include Lamborghini S.p.A. in Sant'Agata Bolognese, Italy, and quattro GmbH in Neckarsulm. Audi currently employs around 54,000 people worldwide, including 45,000 in Germany. The brand with the four rings invests more than € 2 billion each year in order to sustain the company's technological lead embodied in its "Vorsprung durch Technik" slogan. Audi plans to significantly increase the number of models in its portfolio by 2015, from the 26 currently on offer to 40.

[TripleSix]

non è ancora chiaro se questo motore avrà il turbo o il compressore volumetrico, le voci al riguardo sono ancora contraddittorie. cmq sia è un'ottima cosa imho, specialmente sulla S4. sulla A6 risulterà utile soprattutto negli USA imho.

[_hainz]

Da notare l'alzata variabile delle valvole (non continua), molto utili per migliorare l'efficienza.

[Danyxx82]

Scritto in origine da TripleSix

non è ancora chiaro se questo motore avrà il turbo o il compressore volumetrico, le voci al riguardo sono ancora contraddittorie. cmq sia è un'ottima cosa imho, specialmente sulla S4. sulla A6 risulterà utile soprattutto negli USA imho.

Al 95% sarà turbo.

[simonepietro]

affermano con sicurezza che è TFSI.Forse la versione per l'A 6 sarà solo turbo. Vedremo, perchè sono curioso di vedere come eventualmente risolvono i problemi d 'integrazione di un turbo e di un compressore meccanico su un 6 cilindri.

[J-Gian]

Ma sicuro sarà un V6 biturbo, non ha senso mettere anche un volumetrico con queste potenze: 2 piccole turbine bastano e avanzano.

[TripleSix]

Scritto in origine da J-Gian

Ma sicuro sarà un V6 biturbo, non ha senso mettere anche un volumetrico con queste potenze: 2 piccole turbine bastano e avanzano.

già, non credo che vederemo turbo + compressore volumetrico, nemmeno sulla versione + potente per la S4. penso che sarà biturbo per la S4 e (forse) con un solo turbo per la A6 (o più probabilmente sempre biturbo, ma cn due turbine più piccole, per quest'ultima soluzione).

[Alfa_JTD]

Che io sappia, la potenza del nuovo V6 TFSI, che non è un biturbo ma, a quanto ho capito fin'ora, un compressore volumetrico + turbocompressore, è di 336 cavalli e quasi 500 Nm di coppia.

[Danyxx82]

Dubito che per 336cv usino la soluzione turbo + volumetrico.
Scommetto che sarà solo bi-turbo.
Il nuovo 2.0 TFSI da 211cv ha 350Nm di coppia a 1500 giri, con la stessa potenza e coppia specifica un 3.2 turbo avrebbe 337cv e 560Nm di coppia. Cmq 336cv x un 3.2 bi-turbo sono davvero POCHI. Con un motore del genere non penso avrebbero problemi a raggiungere i 400 cavalli con 2 turbine!!

[Regazzoni]