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 GT 63 S E Performance
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| Mercedes-AMG GT 63 S E Performance |
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<< Prev Page 2 of 3 Next >>  The high-performance battery of the AMG GT 63 S E PERFORMANCE has a capacity of 6.1 kWh, 70 kW of continuous output and 150 kW of peak output for ten seconds. The low weight of only 89 kilograms allows the very high power density of 1.7 kW/kg. For comparison: conventional batteries without direct cooling of the cells achieve about half of this figure. Charging is via the 3.7 kW on-board AC charger, at a charging station, wallbox or household socket. The battery is designed for fast power delivery and draw, not for the longest possible range. Nevertheless, the electric range of 12 kilometres allows a practical operating radius, for example for quiet and emission-free driving from a residential area to the outskirts of the city or to the motorway.The basis for the high performance of the AMG 400 volt battery is the innovative direct cooling: for the first time, a high-tech coolant based on an electrically non-conductive liquid flows around all 560 cells and cools them individually. Every battery needs a defined temperature for optimum power delivery. If the battery becomes too cold or too hot, it noticeably loses power at times, or has to be regulated to avoid damage if the heat becomes excessive. The even temperature of the battery therefore has a decisive influence on its performance, service life and safety. Conventional cooling systems, which only cool with air or the entire battery pack indirectly with water, quickly reach their limits - especially as the requirements continue to increase due to cells with ever increasing energy density. If the thermal management does not fulfil its function optimally, the battery is at risk of ageing prematurely. For the direct cooling, the AMG specialists had to develop new cooling modules that are only millimetres thin. Around 14 litres of coolant circulate from top to bottom through the entire battery past each cell with the help of a specially developed high-performance electric pump, also flowing through an oil/water heat exchanger attached directly to the battery. This conducts the heat into one of the vehicle's two low-temperature (LT) circuits, and from there to the LT radiator at the front of the car where it is released into the outside air. The system is designed to ensure even heat distribution in the battery. The result is that the battery is always within a consistent, optimum operating temperature window averaging 45 degrees Celsius, no matter how often it is charged or discharged. It may well be that the average temperature is exceeded when driving at high speeds. The protection mechanisms are therefore configured so that the maximum performance can be obtained from the battery, with the temperature level subsequently lowered by direct cooling. Conventional cooling systems cannot cope with this, and the battery can no longer fully utilise its potential. That is not the case with the AMG high-performance battery: even during fast laps in hybrid mode on the race track, where acceleration (battery is discharged) and deceleration (battery is charged) are frequent, the energy storage system retains its high performance capacity. Only effective direct cooling makes it possible to use cells with a very high power density. Thanks to this individual solution, the battery system is particularly light and compact. The low weight is also due to the material-saving busbar concept, and the lightweight yet strong crash structure of the aluminium housing. It ensures the highest level of safety. The basic operating strategy is derived from the hybrid powerpack of the Mercedes-AMG Petronas Formula 1 racing car. As in the top class of motorsport, maximum propulsion is always available when the driver needs it - for example, to accelerate powerfully out of corners or when overtaking. the electric power can always be called up and frequently reproduced via high regeneration performance and on-demand recharging. The independent battery concept enables the optimal compromise between maximum driving dynamics and contemporary efficiency. All components are perfectly coordinated: The performance gain can be experienced directly. The seven AMG DYNAMIC SELECT driving modes "Electric", "Comfort", "Sport", "Sport+", "RACE", "Slippery" and "Individual" are precisely configured for the new drive technology and thus provide a wide-ranging driving experience - from highly efficient to highly dynamic. The driving modes adjust important parameters such as the response of the drive system and transmission, the steering characteristic, the suspension damping or the sound. The modes can be selected using the rocker switch in the centre console or the AMG steering wheel buttons. Usually, the Performance hybrid starts silently ("Silent Mode") in the "Comfort" driving mode when the electric motor is switched on. In the instrument cluster, the "Ready" icon signals that the vehicle is ready to drive. In addition, a powerful, sonorous start-up sound typical of AMG is emitted in the interior via the vehicle's loudspeakers as acoustic feedback showing readiness to get going. Slight pressure on the accelerator pedal is all it takes to set the AMG Performance hybrid in motion. When driving on all-electric power, the legally required Acoustic Vehicle Alerting System warns the surroundings that the Performance hybrid is approaching. A specially composed low-frequency, speed-dependent AMG sound is emitted to the outside via single loudspeakers at the front and rear. The sound can also be heard at a subdued level in the interior, as acoustic feedback for the passengers. In the European Union the system is active up to 20 km/h, in the USA up to the equivalent of approx. 30 km/h. After that, the driving signal fades out harmoniously up to approx. 50 km/h. At higher speeds, the customer can select the sound experience between "balanced" and "powerful" using the sound buttons in the centre console or on the steering wheel (recognisable by a frequency wave symbol): When driving on all-electric power, either a discreet or a powerful sound experience is generated. When the combustion engine starts, the selected setting influences the sound of the exhaust system. In every situation, one thing remains the same: under all conditions, the Performance hybrid is immediately recognisable as an AMG by its sound.
Because the high-performance battery is always in the optimum temperature window of around 45 degrees thanks to direct cooling, regeneration can also be optimised - normally a battery heats up strongly at high regeneration power, so that energy recovery needs to be limited. Regeneration starts when drivers takes their foot off the accelerator pedal, i.e. in overrun mode without touching the brake pedal. This charges the battery and creates a strong braking torque - the wheel brakes are subjected to less wear or, depending on the regeneration level and traffic situation, do not have to be applied at all. The driver can select four different regeneration levels using the right-hand AMG steering wheel button. This applies in all driving modes with the exception of "Slippery", and the energy recovery is configured differently depending on the driving mode.
As the new top model in the range, the AMG GT 63 S E PERFORMANCE benefits from the performance of the AMG 4.0-litre V8 biturbo engine with 470 kW (639 hp) and a maximum torque of 900 Nm, which is available over a wide rpm band from 2500 to 4500 rpm. This harmonises perfectly with the electric motor, which delivers its maximum of 320 Nm right from the start. Two twin-scroll turbochargers are partly responsible for the high power output, combining optimum response at low engine speeds with a high increase in power at higher engine speeds. In addition to this, the turbine housing is divided into two flow passages which run parallel to one another. Combined with two separate ducts in the exhaust manifold, this makes it possible to individually control the momentum of the exhaust gases acting on the turbine wheel. One duct is fed by the exhaust gases of the first and second cylinders of a cylinder bank, the other by the exhaust gases of the third and fourth cylinders. The aim is to prevent the individual cylinders from having mutually adverse effects on the gas cycle. This reduces the exhaust gas back-pressure and improves the gas exchange. The belt-driven starter-generator (RSG) combines the alternator and starter in one component, and has an output of 10 kW (14 hp). It starts the combustion engine and ensures the basic supply of the ancillary units such as air conditioning or driving lights, for example, when the vehicle is at a traffic light and the charge level of the high-voltage battery is no longer sufficient to support the low-voltage on-board electrical system. The RSG is particularly responsive because it is integrated into the 400-volt high-voltage electrical system. << Prev Page 2 of 3 Next >> |
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