INJEÇÃO DE ÁGUA BMW M4 Coupe MotoGP Safety Car 2015 Biturbo 431 cv 56,1 mkgf 0-100 kmh 4,1 s@ 60 FPS

(from BMW Press Release) As it did in 2014, the BMW M4 Coupé will again head the Safety Car fleet in the MotoGP World Championship in 2015. BMW M Division's high-performance coupé has been designed to ensure maximum driving dynamics and with its use on the racetracks of this world in mind. The six-cylinder inline engine with M TwinPower Turbo technology, a high-rev concept and distinct racing genes contributes significantly to the high-performance character of the overall concept. Already the production version of the sporting heart delivers a top performance of 431 hp (317 kW) and provides a maximum torque of 550 Nm (combined fuel consumption of 8.8-8.3 l/100 km, combined CO2 emissions of 204-194 g/km) over a broadly usable range of revolution speeds.
TECHNOLOGY TRANSFER WITH POTENTIAL FOR THE FUTURE
Appearing as it does in the extremely performance-oriented world of MotoGP, where the world's top motorcycle racers battle for points and positions, the Safety Car must also boast appropriately impressive performance parameters. With this in mind, the engineers at BMW M Division have equipped the highperformance power unit with an innovative water injection, thus considerably increasing the engine's performance. Water injection makes it possible to raise the upper performance limits, which have otherwise been restricted thermally. As well as increasing performance and torque, the innovative system in the BMW M4 MotoGP Safety Car also ensures outstanding efficiency with benefits in terms of fullload consumption and exhaust emissions. As a BMW M product at the cutting edge of technology and innovation, the BMW M4 MotoGP Safety Car also opens up possibilities for use of this technology in future production models.
SOPHISTICATED COOLING SYSTEM FOR MAXIMUM PERFORMANCE
Up until now the high potential performance of the charged, six-cylinder inline engine has always placed particularly high demand on the temperature management of the engine and its auxiliaries. In order to guarantee optimal operating temperatures at all times, BMW M Division has turned to a cooling system that is as innovative as it is effective. Next to the main radiator, additional radiators also ensure balanced temperature control for the high and low temperature circuits, as well as for the gearbox and turbocharger. The exhaust air, which is heated by the turbocharger, is cooled using indirect intercooling and is supported by an additional electric water pump.
The kind of increase in performance evident in this year's BMW M4 MotoGP Safety Car also places even greater demand on the thermal qualities of the turbo engine, particularly the cooling of the supercharged air. This challenge has been overcome using the innovative water injection. As well as significantly increasing performance, the high-performance power unit also boasts outstanding fullload consumption and emission figures.
Following intense testing within the MotoGP World Championship, the water injection system will also be employed in a BMW M production model in the near future. This allows BMW M Division customers to take advantage of high-performance technology straight from the racetrack, which considerably improves performance on the streets and is ideally suited for everyday usage.
WATER INJECTION: COOLING EFFICIENCY INCREASES EFFECTIVENESS
The water injection system employed by BMW M Division further optimises the performance and consumption of the charged six-cylinder, inline engine at full throttle. The engineers make use of the water's physical effect during the vaporisation process to extract the energy required from the environmental medium. Water is injected into the intake module's collector as a fine spray, thus significantly cooling the exhaust air during vaporisation. This lowers the discharge temperature in the combustion changer and thus reduces the tendency for knocking. The turbo engine can thus be operated with a higher charging pressure and an earlier ignition point.
The lower process temperatures also reduce the formation of hazardous substances, in particular nitrogen oxide (NOX). Water injection consequently dramatically improves the effectiveness of the engine. The technology increases performance and torque, whilst at the same time ensuring outstanding consumption and emission figures. As such, the improved performance can be achieved without increasing the heat applied to performance-related components, meaning the reliability of these parts is not affected.
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