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Audi Officially Announce New 3.0 TFSI Supercharged Engine

 Audi Officially Announce New 3.0 TFSI Supercharged Engine
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290hp and 420Nm of torque

Today Audi officially announced the new 3.0 TFSI engine, a new high-tech V6 combing Audi's latest state-of-the-art technologies – gasoline direct injection and supercharging, which indicates that the “T” in Audi's engine designation can no longer be solely associated with turbocharged versions. The new unit pumps out 290hp (213 kW) and a quite impressive 420Nm (310 lb-ft) of torque.

Thrust of the compact supercharger, which sits inside the 90-degree V of the cylinder banks in place of the intake manifold, is available from idle speeds because it is belt driven, thus, enabling the unit to produce its maximum 420Nm of torque at just 2500rpm.

We can expect to see figures well under 10 liters per 100km (23.52 mpg) although final figures will vary depending on which model it is deployed in.

Audi is yet to confirm which models are likely to get the new 3.0 TFSI unit, but in line with the leaked engine offensive document we expect it to make its debut in the Audi A6 Facelift which will be released later this year and we should also see a tuned version make its way into the new S4 replacing its current 350hp V8 unit.

Source: Audi AG
Published Jun 27, 2008 6:47 am By Clinton Deacon
Posted in:

  • 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.

 

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Comments (17)

Supercharger is belt driven and Turbocharger is exhaust propelled, but they both serve the same purpose to force more in the engine to boost power. So anyway do not underestimate Audi when it comes to technology because this might be Audi's first supercharger coming to the market but Audi been supplying so many other manufactures with similar components of this nature.
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February 6, 2009 6:50 pm
 wisp wisp
...and it will easily win the 'International engine of the year award' - just to rub salt into the current double winner the 2.9 litre BMW bi turbo. The good part is this class of engines is becoming extremely competitive what with Subaru and Mitsubishi also making super turbo engines. How does this engine compare to the 2 litre turbo doing it's duty in the S3. That's a good engine.
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July 1, 2008 8:07 am
 poverty poverty
this engine is to replace 3.2 v6.
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June 30, 2008 8:39 pm
 paultantk paultantk
there will probably be different states of tune for this engine. this is likely the spec to go into the a6. the s4/s5 will get a higher powered version.
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June 29, 2008 9:44 pm
 audidood audidood
so if you want a s4 buy a a4 and supercharge bad move for audi and if you want to know how it will sound http://www.youtube.com/watch?v=03bcJ9jYk...
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June 29, 2008 1:00 am
 humeid humeid
wooow this will be gr8 looking forward to drive this engine :)
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June 28, 2008 6:42 pm
 norther norther
oookk...after ruining the 5.2 v10 biturbo, they ruined this one too? why it doesn't even have 100 bhp per litre...with this "state of the art" supercharger? 290??? jeeezzz, are they cheap. at least 300. and they wanna replace the 350 bhp engine on the s5 with this one? oh come on... i think it's a stupid move. just like with the r8 v10, they gave it less bhp than the rs6...and the future rs 7. stupid...
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June 28, 2008 3:31 am
 RS5 RS5
Is this the new v6 engine that's rumored to be in the newer S5s? I'd rather keep the FSI V8. It probably sounds much nicer.
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June 27, 2008 11:08 pm
 bernardo bernardo
this engine could also make its way to the TT clubsport or the TT-RS IMO
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June 27, 2008 5:56 pm
 tootall tootall
I still think Turbochargers are more efficient. If it's that instanious delivery of torque/ hp they want, then just make it a compact turbo.
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June 27, 2008 3:51 pm
 heat_fan1 heat_fan1
I could be wrong, but I'm guessing this engine will replace the current 3.1. As Nitrous points out, it's closer in line with the BMW 3.0 turbo, as well as the V6s from everyone else.
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June 27, 2008 3:49 pm
 NitrousOxide NitrousOxide
Now this engine will be a proper fighter to BMW's 3.0 turbo.. Although this has 20 Nm more of torque, it has 16 less horsepower..
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June 27, 2008 2:18 pm
 enigma243 enigma243
Turbo- and superchargers achieve the same aim, but through completely different means. Both force more air into the engine on intake, but a supercharger is driven by the engine itself, whereas a turbocharger is driven by exhaust gass as it is expelled.
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June 27, 2008 12:07 pm
 un_peacekeeper un_peacekeeper
Errr...isn't a supercharger a form of a turbocharger. In that sense, Audi is still using the T as it has already been. It's just that Audi now has their first ever supercharged engine.
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June 27, 2008 12:04 pm