Overall length of packaging 367 mm
9HP control unit
The ECU (electronic control unit) is installed separately from the now significantly smaller hydraulic control unit (HCU), namely on the upper side of the transmission housing. The sensors can be found inside the transmission, vehicle-side signals are connected directly to the male plug of the ECU.
With conventional wastegated turbochargers or fixed geometry turbochargers (FGT), a turbine flow area cannot be adjusted during operation.
Knocking is abnormal combustion in which the air-fuel mixture ignites prematurely due to exposure to high temperature and pressure, creating an unwanted high-frequency noise. When the compression ratio is increased, the temperature at compression top dead center (TDC) also rises, increasing the probability of knocking.