Jan 17 2011, 02:56 PM
QUOTE(feelfree @ Jan 17 2011, 02:22 PM)
The supercharging actually is working at low RPM and we all know that most of the Turbo will not get good result at low RPM or we call it turbo lag, so VW thinking to get good power from low to high rpm, so they mixed the supercharge and turbocharge together, low rpm the supercharge will kick in to give full torque until certain rpm, the supercharge will stop working and turbo charge will then start working until redline.
There are twin turbos and twin scroll turbos today which has a smaller turbo for low RPM and bigger ones for higher RPM. This can already overcome turbo lag and reduce the complexity of both a supercharger and turbo in the same engine. If the end result ie flat torque curve and lower emissions while reducing complexity can be achieved with one twin scroll turbo charger why make it more complex?The VW TSI engine is a great engine but technology moves on.
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