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M Double-clutch Transmission with Drivelogic - M-specific Drivelogic

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M Double-clutch Transmission with Drivelogic
Always a step ahead
Perfect combination
M-specific Drivelogic
Sequential gearshift with paddles
Specifications BMW M3
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M-specific Drivelogic with eleven driving programs.
The driver of a BMW M3 equipped with the M double-clutch transmission has the choice not only of automated and manual selection of gears, but also variable gearshift characteristics both in the D- and S-mode. For in both cases he is able to determine the degree of gearshift dynamics as he wishes.
The configurations available range in several steps from a more balanced, comfort-oriented all the way to a very dynamic, racing-like set-up of the transmission.
To provide this additional function, Drivelogic specially tailored to the M double-clutch transmission provides no less than five driving programs in the D- and six programs in the S-mode.
This gives the driver the opportunity to configure his BMW M3 perfectly to his personal preferences also when it comes to the car’s gearshift characteristics. At the same time he has the freedom to choose the appropriate set-up in various driving situations, taking, say, weather conditions, his route, or the load/number of passengers the car is carrying into account.
To change the gearshift program, all the driver has to do is press the Drivelogic button on the centre console. Indeed, he is even able to save his personal favourite among the Drivelogic options as part of an individual, personalised configuration, then retrieving this specific function at any time simply by pressing the MDrive button on the multifunction steering wheel of his BMW M3. Then, just like the gear currently in mesh, the driving program selected is shown in the instrument cluster between the speedometer and the rev counter.

Sports or comfort: the driver has the choice.
In the D-mode with the gearbox shifting automatically among no less than seven gears, the driver has the choice of five Drivelogic programs adjusting the gearshift characteristics very precisely to the driver’s individual style of motoring.
The driving programs differ through the speed at which they change gears as well as the engine revs at which a gearshift is initiated. Both of these parameters are varied in all driving programs as a function of current driving conditions, the speed of the car, and the position of the gas pedal. So choosing the appropriate driving program, the driver is able to use the sports and comfort potential of the M double-clutch transmission as he wishes.
In a particularly sporting set-up – driving program D5 – the M double-clutch transmission shifts up almost like in a racing car whenever the driver activates the kick-down function, that is shortly before the engine reaches its maximum speed – and the process of shifting down is equally dynamic.
The other end of the gearshift range is Drivelogic stage D1 enabling the driver to set off in second gear. In this case the clutch is particularly smooth and soft, helping the driver to set off without problems on, say, slippery surfaces in winter.
In the automated mode the driver is able to influence the gearshift for example by taking back the gas pedal slowly and determining himself when the transmission shifts up. Conversely, by kicking down the gas pedal he is able to quickly shift back to the best gear for optimum acceleration.

Clear signals: feedback when shifting and Shift Lights.
In the manual gearshift mode the driver has the choice of six Drivelogic driving programs again rendering the complete range of features and characteristics so typical of the M Double Clutch Gearbox. In the most dynamic Drivelogic stages in the S-mode, management of the clutch is very sporting and dynamic, creating the direct flow of power so typical of a car with a manual gearbox – which is precisely what most drivers with a particularly sporting orientation expect. Indeed, this kind of feedback to the driver after shifting gears serves to further emotionalise the driving experience in a BMW M3 with the M Double Clutch Gearbox.
The engine speed required for optimum acceleration when shifting up is presented clearly to the driver by eight LED units housed in the upper edge of the rev counter on the ornamental surround. These Shift Lights enable the driver to precisely determine the ideal time for shifting gears. Six LED units flashing on in yellow one after the other accompany the engine as it approaches its top speed. The latest moment for shifting up is then presented by two LED units coming on in red.
Once the engine reaches its maximum speed, the lights so far remaining on consistently start to flash on and off. A further point is that the driver is able to configure the individual operation of the Shift Lights via the MDrive button and, if he wishes, deactivate their operation in the instrument cluster.

Manual mode with Launch Control for setting off like a racing car.
In the manual mode Drivelogic also provides a Launch Control function operating in accordance with specific BMW M parameters. Under optimum conditions in terms of the tyre condition, road surface and the load the car is carrying, Launch Control ensures the fastest possible acceleration from a standstill. To achieve this dynamic performance, all the driver has to do with the car at a standstill and in driving program S6 is move the sports shift lever to the front and hold it in this position. Then, as soon as the starter flag symbol comes on in the instrument cluster, the driver just presses down the gas pedal to automatically obtain the ideal starting speed on the engine. Pressing down the brake pedal lightly with his left foot, in turn, the driver can prevent the car from rolling forward, and by briefly tipping the cruise control lever he is able to finely adjust the desired starter speed.
Then, after letting go the selector lever, the BMW M3 accelerates with optimum performance and with slip on the rear wheels controlled by the clutch – if the driver wishes, all the way to top speed.
In this process the M double-clutch transmission chooses exactly the right gearshift points ensuring optimum pick-up of engine speed when shifting up.
To use Launch Control the driver is first required to deactivate DSC Dynamic Stability Control. Then, after completing the acceleration process, the driver again takes command in choosing the gears he wishes to use.



Last Updated on Saturday, 22 March 2008 18:38  
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