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The M double-clutch transmission - page 8 / 21





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BMW Media Information

1/2008 Page 8

Perfect combination: eight cylinders and 8,400 rpm, two clutches and seven gears. Both in its basic configuration and in the specific application on the BMW M3, BMW’s new M double-clutch transmission with Drivelogic is the ideal partner for the – likewise brand-new – eight-cylinder power unit of the new BMW M3. Quite simply, this is because the particular power and performance characteristics of BMW’s M Cars were taken into account from the start by the engineers in developing the new transmission.

In this process the engineers at BMW M GmbH were able – over and above their detailed knowledge of BMW M engines and their particular features – to contribute many years of experience in the development and set-up of the Sequential M Gearbox in the process of developing the new transmission. This skill therefore went directly into the design and construction of the M double-clutch transmission and was compared right from the start with the knowledge gained in developing the new V8 high-speed engine for the BMW M3. As a result, the M double-clutch transmission is the first trans- mission of its kind able to handle engine speeds of up to 9,000 rpm. And at the same time it is perfectly prepared for high engine torque and extra power.

Given this qualities, the M double-clutch transmission is particularly suitable for the BMW M3, where the unique muscle of the 309 kW/420 hp V8 power unit is based on the high engine speed concept so typical of BMW M: The eight-cylinder reaches its maximum output at 8,300 rpm and revs all the way to 8 ,400 rpm. Maximum torque, in turn, is 400 Newton-metres or 295 lb-ft.

So precisely this kind of power and muscle was taken into account from the start in developing the M Double Clutch Gearbox.

Like the Sequential M Gearbox already featured today, the new M double- clutch transmission comes with seven gears allowing perfect adjustment of the transmission ratios to the engine’s power and performance. As a result, the new gearbox shifts gears when accelerating with only a minimum gap or increment between the gears involved, ensuring an optimum flow of engine power and speed in every gearshift and allowing the driver to really enjoy the enormous power reserves of the engine.

This serves to capitalise on the engine’s torque and the traction and muscle offered by the high-speed concept throughout the entire speed range. After every gearshift, therefore, the speed of the car on the road continues to increase unabated with ongoing power and muscle.

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