Water-cooled bearing housing
Wastegate-linkage with ball joints
Turbocharger with steel casting turbine housing
Patented turbine /center housing connection with tie-rod screws
Enhanced transient boost response
Fuel consumption reduction
Variable Turbine Geometry (VTG)
Low inertia mixed flow turbine wheel
BorgWarner series-2 compact brushless actuator
Milled titanium high boost pressure compressor
Bearing housing with ball-bearing to optimize total efficiency
Efficient exhaust gas recirculation (EGR)
The 48V e4Boost solution, composed of an Electric Supercharger 48V and a Belt Starter Generator iBSG 48V, recovers a maximum amount of braking energy and stores it in a 48V battery.
Volvo XC90 MY2017
To ensure maximum acceleration from a standstill without the "turbo lag" feared by sports car drivers, the Chiron moves off the mark with only two turbochargers in operation. The other two units are only activated at about 3,800 rpm.
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.