Electric turbochargers (in this case, we are talking about a Garrett model produced for Mercedes) are devices that incorporate an exhaust-gas turbine (with associated electronically-controlled waste-gate management), a central core (with associated lubrication and cooling system), a centrifugal compressor (with respective electronically controlled by-pass system), and a novel and unknown component on normal turbochargers: an electric motor powere
In vehicles that use the turbocompound system, before the exhaust gases reach the first part of the exhaust system, they are routed to a second turbine. This turbine is mechanically connected to a set of gears whose purpose is to demultiply the turbine's rotational speed and multiply its torque.
This is a type of injection pump that is very suitable for modularity. This means that the pump has a part in which the drive shaft with its minimum-maximum regulator and the centrifugal advance regulator is fitted. After that, the various pumping units can be 3, 4, 5, 6, etc., meaning these pumps are easily adapted to architectures suitable for engines with variable (and many) cylinders.
Did they go too far at BMW? Recall that BMW's first 6-cylinder 3-liter common-rail, the one initially installed in the 530d E39, had 184hp. After a short time, the enhanced 193hp version arrived. Then they switched to the new 2993cc that featured a different common-rail injection system, different turbocharger, different timing set-up, and different electronics.
Another successful AUDI model, this Q3, is well-liked and is commonly seen on the road. They are small but not small and, in fact, weigh nearly 1,500 kilograms, at least in the 35 TFSI turbocharged gasoline version. This version mounts the 1,500-cylinder inline engine with direct gasoline injection.