By August 24, 2013 Read More →

The new Mercedes-Bens S 500 Plug-In Hybrid

MB S 500 Plug-In HybridMercedes-Benz S 500 Plug-In Hybrid is the third hybrid model of the new S-Class. In the S 500 Plug-In Hybrid the new 3.0-litre V6 turbocharged engine (245 kW) is combined with a 80 kW electric motor. Combustion engine creates 480 Nm of torque and the electric motor additional 340 Nm. Overall consumption (NEDC) is 3.0 l/100 km and CO2 emissions 69 g/km. Operating range on electric power alone is about 30 km. The car can accelerate from zero to 100 km/h in 5.5 seconds.

While the batteries of the S 400 Hybrid and S 300 BlueTEC Hybrid as autonomous hybrids are charged during braking or coasting or by the combustion engine, the new high-voltage lithium-ion battery of the S 500 Plug-In Hybrid has ten times the energy content and offers the option of being recharged from an external source with a charging socket located on the right side of the rear bumper. Four hybrid operating modes can be selected at the push of a button: HYBRID, E-MODE (electric power only), E-SAVE (fully charged battery is reserved to be able to drive on electric power alone later) and CHARGE (battery is charged while driving).

The largest potential for lowering the energy consumption of hybrid drive systems lies in maximising energy recovery during coasting and braking. Upon depressing the brake pedal the deceleration is initially effected by the electric motor and not by the disc brakes. The new S-Class is the first to use a recuperative braking system (RBS) of the second generation. It ensures an unnoticeable overlapping of the conventional mechanical brakes and the electric braking performance of the electric motor in alternator mode.

The driver’s desired braking power is recorded by a pedal-travel sensor. The deceleration is dependent on the driving condition and is split into a recuperative brake-force portion and a portion to be supplied by the wheel brakes. The brake pressure on the rear axle is controlled by the RBS dependent on the current recuperation potential of the powertrain. In addition, the combustion engine is switched off any time the vehicle is coasting and its drag torque when rolling is used by the electric motor as recuperation torque. However, without depressing the brake pedal no additional deceleration torque is provided for charging the battery and the vehicle can “sail”. The combustion engine is to be used for charging the battery as little as possible and only at suitable and most efficient operating points.

Mercedes-Benz will present the S 500 PLUG-IN HYBRID at the Frankfurt Motor Show (IAA). The market launch will be next year.