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Mercedes-Benz S 500 Plug-in Hybrid Revealed

S-Class-Plug-in-Hybrid
Mercedes-Benz will present the S 500 PLUG-IN HYBRID at the 2013 Frankfurt Motor Show next month and is set for a market launch next year.

With the new S-Class Mercedes-Benz expands the hybrid line-up in this model series to three models: the S 400 HYBRID, S 300 BlueTEC HYBRID and S 500 PLUG-IN HYBRID.

All second-generation hybrid drive systems share the seamless integration into the powertrain. The combustion engine can be completely decoupled from the electric motor. Further features are the second-generation recuperative braking system and the anticipatory Intelligent HYBRID energy management system.

“With the S 500 PLUG-IN HYBRID Mercedes-Benz sets another milestone on the road to emission-free mobility on the basis of our modular hybrid matrix”, explains Prof Dr Thomas Weber, responsible on the Daimler Board of Management for Group Research and Head of Mercedes-Benz Cars Product Engineering. “In this way the S-Class turns into a genuine three-litre car with generous space and superlative drive-system comfort.”

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. With the help of the electric synchronous motor (80 kW/340 Nm) the S-Class can thus drive for up to around 30 kilometers (about 18.6 miles) on electric power alone.

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
– CHARGE: battery is charged while driving

Under the conditions specified by the certification rules the S-Class as a full hybrid generates 69 g CO2 per kilometer. With consumption equivalent to 3 liters per 100 kilometers (78.4 mpg US) the S-Class sets a new benchmark for luxury saloons that just a few years ago was thought virtually impossible. It delivers these top values without restrictions in power, passenger comfort or operating range and offers a high level of climate comfort thanks to the pre-entry climate control functions.

The most important benchmark data of the S 500 PLUG-IN HYBRID:

– Power output of 245 kW (328 hp) of the combustion engine plus 80 kW (107 hp) electric motor and torque of 480 Nm of the combustion engine plus 340 Nm of the electric motor
– Overall consumption (NEDC) 69 g CO2/km (3.0 l/100 km)
– Operating range on electric power alone about 30 km
– Top speed 250 km/h (155 mph), 0-100 km/h (0-62 mph) in 5.5 sec.
– Intelligent HYBRID: anticipatory energy management system with optimal use of recuperation during deceleration
– Individualization possible as the result of the combination of the transmission modes with the four hybrid operating modes – HYBRID, E MODE, E-SAVE and CHARGE.
– Haptic accelerator pedal for superior vehicle control: A point of resistance on the accelerator pedal provides feedback about the activation of the combustion engine and helps in metering the power output.
– Fast external charging of the high-voltage traction battery
– Pre-entry climate control of the interior

Intelligent HYBRID: anticipatory energy management system
The second-generation S-Class hybrids feature an anticipatory energy management system and thereby improve energy efficiency. The operating strategy of the hybrid drive system not only accounts for the current driving condition and driver input, but also adjusts to the likely route (inclines, downhill stretches, bends or speed limits) for the next eight kilometers. Intelligent HYBRID uses the navigation data from COMAND Online to manage the charging and discharging of the high-voltage battery. The goal is, for example, to use the energy content of the battery for propulsion ahead of a downhill stretch in order to recharge it while going downhill using recuperation.

Recuperative braking system: the electric motor as alternator
The largest potential for lowering the energy consumption of hybrid drive systems lies in maximizing 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.[wzslider height=”400″ lightbox=”true”]

Aug 20, 2013Blagojce Krivevski
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Blagojce Krivevski

Blagojce Krivevski is physicist and green technology lover. Keep in touch with Blagojce through his email, web site, Twitter, Linkedin, Facebook and Google+.

August 20, 2013 Electric Car News, Plug-in Hybrids2013 Frankfurt Motor Show, Frankfurt Motor Show, mercedes benz, Mercedes-Benz S 500 PLUG-IN HYBRID, S 500 PLUG-IN HYBRID, S Class Plug-in Hybrid
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