The BorgWarner engineer was right, it will take one to two years to get turbochargers experiencing with integrated electric motor. Presumably, the company is working hard on it, because exactly this missing for best performance of turbochargers. The electric motor would be a great help to eliminate the 'turbolag' or at least to mitigate it.

This SQ7 supplies already a foretaste. The SUV with TDI V8 is high enough in the settled price scale to in addition to its two turbos also let himself carry out of the lower speed range by an electrically driven compressor. Check out the torque curve in the picture below, a constant 900 Nm down to 1000 reys.

One may assume that this torque is temporally compact available, because that is mainly the problem. In this case the electric motor is far away from the heat of the turbine part and the connecting shaft between the turbine and compressor has not to carry any weight that makes its reactions slower. Probably much work for the engineers, because the system of the SQ7 is for hard price calculated vehicles not yet usable.

But something else is still visible, namely the by Audi propagated 48-volt system. Without that are up to 13 kilowatts of electric compressor probably not to create. The maximimum current now is already 270 amps. In a 12V- system it would be four times as many. In SQ7 is therefore a part board network installed with LI-Io battery, for what the car can be named a hybrid, although the manufacturer does not call it that. 06/16

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