The new Mercedes-AMG C 43 4MATIC - the functional principle of the electric exhaust gas turbocharger in detail

An approximately four centimeter narrow electric motor is integrated directly on the shaft of the turbocharger - between the turbine wheel on the exhaust gas side and the compressor wheel on the fresh air side. Electronically controlled, this drives the shaft of the turbocharger directly, thus accelerating the compressor wheel before the exhaust gas flow takes over the conventional drive. This improves the response behavior directly from idle speed and across the entire speed range. The combustion engine reacts even more spontaneously to commands from the accelerator pedal, and the overall driving experience is significantly more dynamic. In addition, the electrification of the turbocharger enables higher torque at low engine speeds. This also increases agility and optimizes the ability to accelerate from a standing start. Even if the driver takes their foot off the gas or brakes, the technology is able to maintain the boost pressure at all times. This ensures a continuously direct response. Operated via the 48-volt vehicle electrical system, the electric exhaust gas turbocharger works at speeds of up to 175,000 rpm, which enables a very high air flow rate. The charger, electric motor and power electronics are connected to the cooling circuit of the combustion engine in order to always create the best possible temperature environment