An S-Class with inline six-cylinder engine? This was last seen back in 1997, and since then Mercedes- Benz has exclusively used large-displacement V8 engines to guarantee the kind of power and torque customers in this segment expect. So can the luxury sedan really impress with its six-cylinder unit and just 183 cubic inches (3 liters) of displacement? You bet it can! Equipped with the pioneering eBooster® electrical booster compressor from BorgWarner, the new six-cylinder units can even trump their V8 predecessors in certain areas.
Excellent driving dynamics with lower consumption
Equipped with a classic turbocharger, the engine in the S 450 generates 362 hp (270 kW) and maximum torque of 368 lb-ft (500 Nm), which is already available from 1,600 rpm. The engine in the S 500, which is equipped with an eBooster®, delivers 429 hp (320 kW) and torque of up to 383 lb-ft (520 Nm), which is available over an impressively wide rev band from 1,800 to 5,500 rpm. This enables the two-ton vehicle to sprint from 0-60 mph in around 4.7 seconds. To ensure that the drive in the S 500 delivers immediate pickup from idle speed and the S-Class can therefore accelerate powerfully, it employs the eBooster® from BorgWarner in addition to its conventional BorgWarner turbocharger. This is an electrical booster compressor that builds up pressure in a fraction of a second, especially at low revs. The eBooster® only requires 0.27 seconds to accelerate to 70,000 rpm and provide the necessary boost pressure, thereby eliminating the starting lag of a conventional exhaust gas turbocharger. The new drive therefore impresses with immediate response and effortless performance in any driving situation. However, the new engines are also best-in-class in terms of fuel consumption. Thanks to the downsizing concept employed, Mercedes-Benz states the standard fuel consumption as 35 mpg US (42 mpg UK) of premium grade petrol.
Ideal for hybrid and combustion engines
The eBooster® was developed specifically to deliver the excellent pickup enjoyed by larger engines in more compact units, while at the same time reducing fuel consumption and exhaust emissions. The first generation eBooster® has been designed for an on-board supply voltage of 48 V, which is now establishing itself as the new standard in more and more vehicles – particularly in the hybrid sector. However, versions for 12 V networks are soon to follow. Equipped with a brushless DC motor, robust samarium cobalt magnets and highly efficient power electronics, the compact eBooster® technology also offers automobile manufacturers flexible installation options and can be adapted to a wide range of hybrid and combustion engines. Volume production of the electrical booster compressor from BorgWarner for Mercedes-Benz has already been successfully launched. Two additional globally active auto manufacturers are also set to premiere their new units soon.
Combines economy with pulling power from low revs:
the eBooster® from BorgWarner.
Foto: © BorgWarner