Timing *chain* for new 2.0T
05-19-2008, 09:26 PM
#1
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Thread Starter
Timing *chain* for new 2.0T
- Spin-on oil filter (previous 2.0T had a cartridge unit that used very expensive elements and required special tools to service)
- Easier to access engine air filter (previous design required engine cover removal and would take at least 15 minutes to replace)
- Timing Chain (previous 2.0T had a timing belt, which required replacement every 110k at the cost of $1200 each time)
- Two Balance Shafts
- Higher Flow Fuel Pump
- Redesigned PCV system
Quote:
The base engine in the new Audi A4 is the 2.0 TFSI. The turbocharged four-cylinder unit is the successor of the highly successful two-liter engine, which, since 2005, has been voted `Engine of the Year' three times in succession by an
international jury of journalists.
The new 2.0 TFSI's most significant characteristics are an inlet camshaft that adjusts variably through up to 60 degrees of crankshaft rotation and two balancer shafts rotating with double the speed of the crankshaft in the crankcase. They compensate the free second-order inertial forces and lead to refined running with very low vibrations.
The injection in the 2.0 TFSI itself demonstrates the innovative status of Audi technology. The newly developed six-hole injectors deliver the fuel into the combustion chambers with a pressure of 150 bar (2175.1 psi). The result is efficient combustion, enhanced by valves for vortexing the injection. A water-cooled turbocharger increases the filling of the cylinders with air; optimized turbine and compressor wheels have improved its reaction. The intercooler is a new development as well, combining a high degree of efficiency with low weight and small dimensions.
The two-liter TFSI engine has the new Audi valvelift system. Unlike the 3.2 FSI, here it facilitates variable control of the exhaust valves, which means that the charge cycle can be drastically improved. The 2.0 TFSI in the Audi A4 thus
reaches its maximum torque of 258 lb-ft at an engine speed of just 1,500 rpm. This technology continues to ensure an extremely quick and dynamic build-up of torque, guaranteeing excellent agility and spontaneity.
The new Audi technology plays just as important a role in achieving high efficiency as does the consistent improvement of all components to minimize friction - with important advances made in the area of cylinders and connecting rod bearing linings. The oil pump operates with volume-regulated delivery and two-stage pressure control, which reduces fuel consumption.
The 2.0 TFSI delivers a sporty performance of 211 hp and a mighty 258 lb-ft of torque, available from 1,500 to 4,200 rpm. This powerplant will be available in North America with quattro drive and both manual and Tiptronic transmissions for sedan (Tiptronic only in Avant). Alternately, Audi delivers the A4 sedan 2.0 TFSI with front-wheel drive with the continuously variable multitronic.
In its fuel consumption, the new TFSI is amazingly frugal: The high torque allowed the developers to somewhat extend the transmission ratio - an important factor in the efficiency concept.
+11hp / 50ft-lbs<ul><li><a href="http://media.audiusa.com/article_text/09A4_MediaInfo.pdf">http://media.audiusa.com/article_text/09A4_MediaInfo.pdf</a</li></ul>
- Easier to access engine air filter (previous design required engine cover removal and would take at least 15 minutes to replace)
- Timing Chain (previous 2.0T had a timing belt, which required replacement every 110k at the cost of $1200 each time)
- Two Balance Shafts
- Higher Flow Fuel Pump
- Redesigned PCV system
Quote:
The base engine in the new Audi A4 is the 2.0 TFSI. The turbocharged four-cylinder unit is the successor of the highly successful two-liter engine, which, since 2005, has been voted `Engine of the Year' three times in succession by an
international jury of journalists.
The new 2.0 TFSI's most significant characteristics are an inlet camshaft that adjusts variably through up to 60 degrees of crankshaft rotation and two balancer shafts rotating with double the speed of the crankshaft in the crankcase. They compensate the free second-order inertial forces and lead to refined running with very low vibrations.
The injection in the 2.0 TFSI itself demonstrates the innovative status of Audi technology. The newly developed six-hole injectors deliver the fuel into the combustion chambers with a pressure of 150 bar (2175.1 psi). The result is efficient combustion, enhanced by valves for vortexing the injection. A water-cooled turbocharger increases the filling of the cylinders with air; optimized turbine and compressor wheels have improved its reaction. The intercooler is a new development as well, combining a high degree of efficiency with low weight and small dimensions.
The two-liter TFSI engine has the new Audi valvelift system. Unlike the 3.2 FSI, here it facilitates variable control of the exhaust valves, which means that the charge cycle can be drastically improved. The 2.0 TFSI in the Audi A4 thus
reaches its maximum torque of 258 lb-ft at an engine speed of just 1,500 rpm. This technology continues to ensure an extremely quick and dynamic build-up of torque, guaranteeing excellent agility and spontaneity.
The new Audi technology plays just as important a role in achieving high efficiency as does the consistent improvement of all components to minimize friction - with important advances made in the area of cylinders and connecting rod bearing linings. The oil pump operates with volume-regulated delivery and two-stage pressure control, which reduces fuel consumption.
The 2.0 TFSI delivers a sporty performance of 211 hp and a mighty 258 lb-ft of torque, available from 1,500 to 4,200 rpm. This powerplant will be available in North America with quattro drive and both manual and Tiptronic transmissions for sedan (Tiptronic only in Avant). Alternately, Audi delivers the A4 sedan 2.0 TFSI with front-wheel drive with the continuously variable multitronic.
In its fuel consumption, the new TFSI is amazingly frugal: The high torque allowed the developers to somewhat extend the transmission ratio - an important factor in the efficiency concept.
+11hp / 50ft-lbs<ul><li><a href="http://media.audiusa.com/article_text/09A4_MediaInfo.pdf">http://media.audiusa.com/article_text/09A4_MediaInfo.pdf</a</li></ul>
05-20-2008, 05:56 AM
#2
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More technical info here
Posted this a few times on the B8 forum, but a good read for those interested.<ul><li><a href="http://www.eb-bruehl.com/files/pr_mtz_engl.pdf">http://www.eb-bruehl.com/files/pr_mtz_engl.pdf</a</li></ul>
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