Quote:
Originally Posted by clee1982
Correct me if I'm wrong, but is 2021 540i mild hybrid behave the same way as E53 mild hybrid? Think the E53 mild hybrid is more than just starter (which might not be a good thing in terms of out warranty fix...)
https://www.caranddriver.com/news/a1...es-inline-six/
4. An Electric Supercharger
The M256 is turbocharged to develop high output from a small displacement, and that means there is the potential of turbo lag under some circumstances. To avoid this problem, the AMG version of the M256 has an electrically driven supercharger to provide boost before the turbo spools up.
This supercharger, which is located downstream of the turbocharger, uses a centrifugal flow compressor—like the compressor side of a turbo—driven by a 48-volt electric motor. It spins to 70,000 rpm and can develop a peak boost pressure of about 6.6 psi. That’s enough to provide strong engine response while the turbo gets up to speed, at which point a check valve closes and the turbo takes over from the electric supercharger. |
That is the E53 as you say. The CLS450 has the 48 volt system with the motor to assist acceleration, but not the electric supercharger.