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 Q4 Sportback e-tron concept
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| Audi Q4 Sportback e-tron concept |
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<< Prev Page 2 of 2  The modular electrification platform (MEB) offers a broad range of drive variants and power levels. The performance version of the electric drive is installed in the Audi Q4 Sportback e-tron concept. The front and rear axles are each powered by an electric motor – this Q4 Sportback is a quattro. There is no mechanical connection between the axles. Instead, an electronic control ensures that the torque distribution is coordinated optimally, and it does so in fractions of a second. That enables the SUV Coupé to achieve optimum traction in all weather conditions and on any type of surface.In most cases, the Q4 Sportback e-tron concept mainly uses its rear electric motor, a permanently excited synchronous motor, in order to achieve the highest efficiency. For reasons of efficiency, the drive torque is generally distributed with a rear-axle bias. If the driver demands more power than the rear electric motor can supply, the electric all-wheel drive uses the front asynchronous motor to redistribute the torque as required to the front axle. This also happens predictively even before slip occurs in icy conditions or when cornering fast, or if the car understeers or oversteers. The electric motor in the rear end has an output of 150 kW and mobilizes a torque of 310 newton meters (228.6 lb-ft); the front motor supplies the front wheels with up to 75 kW and 150 newton meters (110.6 lb-ft). The system output is 225 kW. The battery in the vehicle floor stores 82 kilowatt hours, which allows for a range of more than 450 kilometers (279.6 mi) according to the WLTP standard. The battery is charged with a maximum of 125 kilowatts. It therefore takes little more than 30 minutes to reach 80 percent of the total capacity. However, the recipe for this excellent range involves far more than just an energy storage unit with a large capacity. Just like the first member of the family, the Audi Q4 e-tron concept, the Audi Q4 Sportback also presents itself as an efficiency virtuoso, starting with the low aerodynamic drag of the body, whose drag coefficient is 0.26 and therefore 0.01 below that of the Q4 e-tron SUV. The compact electric product line also features a sophisticated recuperation strategy, leaving out no possibility for optimizing its range. The complex thermal management of the drive and battery, which involves a CO2 heat pump, also contributes to this. A key factor for the sporty character and outstanding transverse dynamics is the low and central position at which the drive components are installed. The high-voltage battery system is optimally matched to the dimensions of the Audi Q4 Sportback and is located between the axles in the form of a flat, broad block beneath the passenger compartment. The battery system weighs 510 kilograms (1,124.4 lb). The center of gravity of the Audi Q4 Sportback e-tron concept is therefore at a similar level to that of a sedan with a conventional drive system. Axle load distribution is perfectly balanced at almost 50:50. The front wheels of the Q4 Sportback e-tron concept are guided on a MacPherson axle with adaptive dampers. In the rear, there is a multi-link axle with separate springs and adaptive dampers. MLB, MQB – modular longitudinal platform and modular lateral platform: These component systems for vehicle development represent a great success story in all segments of Audi and the Volkswagen Group. Previous platforms were designed primarily for the use of combustion engines. What is new and different about the modular electrification platform: It was designed specifically and exclusively for automobiles with electric drive systems. Axles, drives, wheelbases and the interaction between all components are selected and adapted specifically for e-mobility. The placement of the large-volume battery units and their geometry can therefore be optimized without having to make concessions to other drive concepts that must always be taken into account in the MLB and MQB. At the same time, the MEB opens up a huge synergy potential. This platform serves as the basis primarily for electric cars in the high-volume A segment. It allows the best technology available to be developed jointly across brands and used in many different electric cars. The MEB thus also helps electric mobility to break through even in the particularly price-sensitive compact segment. The brand with the four rings launched its electric offensive with the world premiere of the all-electric SUV Audi e-tron* in September 2018. By 2025, Audi will offer more than 20 automobiles with all-electric drive in the most important markets worldwide and achieve roughly 40 percent of its sales with electrified models. The SUVs within this portfolio include the e-tron* and the e-tron Sportback*. In addition, there will be a range of models with classic body layout such as Avant and Sportback. The range will cover every relevant market segment from the compact class to the luxury class. << Prev Page 2 of 2 |
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