X hits on this document

PDF document

The M double-clutch transmission - page 12 / 21





12 / 21

BMW Media Information

1/2008 Page 12

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.

Document info
Document views109
Page views109
Page last viewedSat Jan 21 06:29:30 UTC 2017