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48V electric supercharger (MHEV) Turbocharger: Single twin-scroll turbocharger, or two twin-scroll turbochargers, or single twin-scroll turbocharger with additional 48 V electric supercharger (inline-6); ceramic ball bearings: Fuel system: Petrol: 200 bar solenoid direct injection, centrally-mounted; Diesel: 1,800 bar common rail injection ...
In 2010, Volvo started to experiment with electrically assisted turbochargers. The result was unveiled in 2014, a 450hp 2.0L High Performance Drive-E Powertrain Concept engine, which used a 48-volt electrical system for the electric booster. The engine has three turbos, with the electric "turbo" driving the exhaust turbines of the twin-turbo. [7]
A 48 V system can provide more power, improve energy recuperation, [7] and allow up to an 85% decrease in cable mass. [10]12-volt systems can provide only 3.5 kilowatts, while a 48 V power could achieve 15 to 20 kW or even 50 kW. 48 volts is below the level that is considered safe in dry conditions without special protective measures. [11]
The M256 uses a 48V electrical system to operate a BorgWarner electric supercharger, [6] which can spin up to 70,000 rpm to reduce turbo lag. [7] In the S 500's G variant engine, an integrated starter alternator also provides up to 16 kW (22 PS) and 250 N⋅m (184 lb⋅ft) of boost, and replaces the drive belts by managing the water pump and ...
They use dual overhead camshafts with 4 valves per cylinder, feature twin-scroll turbochargers, [2] and have particulate filters installed. M264 engines also have intake variable valve timing and a 48V system that powers the electric auxiliary compressor and integrated starter alternator.
The C 300 model is powered by a 2.0-litre M254 petrol engine rated 190 kW (255 hp; 258 PS). The M254 is equipped with a twin-scroll "segmented" turbocharger featuring an overboost function that allows it to produce an additional 26 kW for up to 30 seconds, as well as a 48V electric supercharger that provides assist at low engine speeds. [5]
The HR12DDV is a 1.2 L (1,199 cc) all-aluminium direct injected and variable geometry turbocharged straight-three engine 48V mHEV equipped with lifetime timing chain, 12v DOHC, VVT, variable displacement oil pump, electric driven water pump, with Bore Spray Coating, Stop-Start, and regenerative braking, Bore and stroke are 75.5 and 89.3 mm (2. ...
The base engine is the 260 kW (354 PS; 349 bhp) 3.0 TFSI with a twin-scroll turbo, available on Audi S4/S5/SQ5 models. A slightly detuned version (250 kW (340 PS; 335 bhp)) with 48V mild hybrid system is available on various Audi models such as the A6, A7, A8, Q7 and Q8. The 2.9 TFSI engine is a twin-turbo charged high performance variant with ...