The abbreviation TFSI represents the combination of direct injection and turbocharging, a technology that Audi was the first carmaker in the world to introduce in 2004. The two technologies make an excellent team. The fuel injected directly into the combustion chambers is extremely turbulent, thus cooling the chamber walls. The resulting decrease in temperatures solves the problem inherent to all turbocharged engines -- a tendency to knock, ie early detonation of the mixture on hot spots in the combustion chamber. www.eurocarnews.com
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