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    The new Volkswagwen Polo BlueGT, with 103 kW a combined fuel consumption of 4.5 l/100 (DSG version), brings together the two seemingly conflicting goals of ‘dynamics’ and ‘fuel efficiency’. The technical highlight of the sporty compact car is its progressive TSI engine with active cylinder management (ACT), this cylinder deactivation feature alone, the world’s first in a four-cylinder engine, yields fuel savings of 0.4 l/100 km. In addition, the VW Polo BlueGT is an excellent example of how numerous aspects of the worlds of sportiness and fuel efficiency can be combined to create a new automobile in this case by applying elements taken from the Polo GTI as well as the Polo BlueMotion.

    Power of a large car. Despite its sustainable fuel economy and emissions values, the compact VW Polo BlueGT is very agile this Volkswagen, which has a top speed of 210 km/h, accelerates to 100 km/h in just 7.9 seconds. Also having a positive effect on dynamics is the high torque of the TSI. The torque curve is interesting in that it exhibits a plateau-like shape at its upper end: the maximum torque of 250 Nm is available at a low 1,500 rpm and remains constant at this level right up to 3,500 rpm. This uncommon coexistence of efficiency and dynamic performance is enabled by the systematic interplay of ACT, downsizing reduced engine displacement plus direct injection and charging and BlueMotion Technologies Stop/Start system, battery regeneration.

    The 1.4 TSI of the Volkswagwen Polo BlueGT is the top engine of the entirely new EA211 series of petrol engines that has been developed. The engine range consists of 1.0, 1.2 and 1.4 litre engines. The efficient 1.0-litre three-cylinder engines, MPI engines without charging between 44 kW / 60 PS and 55 kW / 75 PS are used to drive such cars as the new up. The 1.2- and 1.4-litre four-cylinder engines were each designed as charged direct fuel injection engines (TSI). They produce 63 kW / 85 PS and 77 kW / 105 PS both 1.2 litre as well as 90 kW / 122 PS and 103 kW / 140 PS both 1.4 litre. One feature common to all engines is their cylinder spacing of 82 mm. Technically, the engines were also designed for use in the future Modular Transverse Matrix (MQB) with identical engine mounting positions.

    Particular importance was also paid to the whole issue of thermal management. To use optimally the thermal energy of the exhaust in the hot running phase, and on the other hand to cool it more effectively at high loads, the exhaust manifold of the new EA211 engines was, for example, integrated in the cylinder head and was provided with its own cooling jacket

    By means of the innovative construction of the exhaust manifold, Volkswagen was also able to use just a very narrow single-scroll compressor in turbocharger selection. Once again, this reduced the engine’s weight. In the EA211, the intercooler was integrated in the induction pipe which is made of injection-moulded plastic. The advantage significantly accelerated pressure build-up. And this has resulted in very responsive downsized engines.

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