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BMW Media Information

1/2008 Page 14

Pulling the paddle or tipping the gearshift lever only once therefore makes the transmission shift down either one or several gears, whatever is appropriate. The electronic control unit in command of the M double-clutch transmission automatically changes the gear currently in mesh to give the car optimum acceleration under its current driving conditions and at the speed at which it is travelling.

Comfort and safety functions rounding off the sporting character of the car. The M double-clutch transmission with Drivelogic supports the driver of the BMW M3 not only when he prefers a particularly sporting mode, but also through a wide range of safety functions. In critical driving situations, for example, the M double-clutch transmission instantaneously opens the clutch currently active to prevent the rear end of the car from swerving round due to engine drag forces suddenly acting on the drive wheels.

For optimum conditions when driving at particularly low speeds – for example when manoeuvring below 5 km/h – the M double-clutch transmission features a Low Speed Assistant. This function already well known from the automatic transmission serves to significantly increase driving and control comfort, for example when parking, and is activated by briefly tipping the gas pedal. After the engine has been switched off, the electronic control unit also automatically activates a parking lock acting through the transmission.

Assistance when setting off on an uphill gradient. Gradient detection by the M double-clutch transmission varies the gearshift points as a function of the route the driver is taking and its specific profile. This means that the gears shift differently on uphill and downhill gradients than when driving on a flat, level surface. Driving uphill, for example, this function avoids the constant change of gears so typical of a conventional automatic transmission, the so-called pendulum gearshift with the gears constantly shifting up and down. When driving downhill, on the other hand, the M double-clutch transmission keeps the lower gears in mesh longer than would otherwise be the case in order to capitalise on the brake power of the engine. And last but not least, the choice of gears is automatically adjusted to an uphill gradient in the automated mode.

Motorsport character for everyday traffic: the BMW M3 with M Double Clutch Gearbox. Introducing the new M Double Clutch Gearbox, BMW M GmbH is presenting a power transmission which offers the latest state of the art in this technology. The M double-clutch transmission with Drivelogic excellently enhances the particularly dynamic character of this high-performance sports car bearing

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