25 Sep '12, 7am

Audi shows new engine with electric turbocharger

Audi shows new engine with electric turbocharger

Audi offers its solution to the decades-old problem of turbo lag with a new engine that features electrically-driven turbocharging. It’s based on the 3.0 litre BiTDI V6 (yes, the diesel that can sing ), which has two turbos; only here, one of them’s a bigger, conventional exhaust-driven unit while the other is a smaller, electric motor-driven compressor. Turbo lag refers to the time lapse between the press of the accelerator pedal and the desired power actually arriving – because turbochargers are driven by exhaust from the engine, a lag occurs when exhaust pressure is not high enough to force the turbine blades to spin and push more air into the engine. Generally, the bigger the turbo, the higher the revs and exhaust pressure required to make it work, and therefore, the bigger the time delay. Sequential twin-turbo systems help this phenomenon somewhat – a smaller turbo wo...

Full article: http://paultan.org/2012/09/25/audi-shows-new-engine-with-...

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green.blogs.nytimes.com 25 Sep '12, 11am

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paultan.org 27 Sep '12, 8pm

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