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View Full Version : BMW’s xDrive All-Wheel-Drive System.....(جديد BMW)


saymyname
14-07-2005, 05:30 PM
BMW 5 Series with xDrive
http://www.germancarfans.com/news/2050714.001/2050714.001.Mini1L.jpg
BMW 5 Series Touring with xDrive
http://www.germancarfans.com/news/2050714.001/2050714.001.Mini2L.jpg
BMW xDrive trasnsfer case
http://www.germancarfans.com/news/2050714.001/2050714.001.Mini3L.jpg



More BMWs than ever before now come with the brand’s one-of-its-kind xDrive all-wheel-drive technology – no less than 20 different models in all. And indeed, BMW’s intelligent xDrive all-wheel-drive system sets new standards in both traction and agility: xDrive allows infinitely variable distribution of drive forces between the front and rear wheels, modifying the flow of power at a speed never seen before. The system immediately recognises the need to change engine power, where appropriate, and respond within fractions of a second.

Introducing the 325xi, the 330xi, and the 330xd in the BMW 3 Series, BMW now offers the advantages of xDrive technology for the first time also in the mid*range segment. And xDrive technology is also featured in the BMW 5 Series (525xi, 530xi, 530xd) as well as the X3 and X5 Sports Activity Vehicles, thus now coming in no less than four different model series.

Action, not reaction: xDrive “thinks” for the driver and acts instantane*ously.

xDrive acts faster than other systems, because it is able to think ahead and anticipate upcoming situations on the road. To offer this unique benefit, xDrive uses information from the wheel sensors showing the system wheth*er a wheel is about to spin and providing data gathered by DSC stability con*trol. The yaw rate (rotation around the car’s vertical axis) and the posi*tion of the steering wheel, for example, offer important data on current driv*ing conditions. Data of this kind is essential, for example, when taking a bend fast and dynamically, xDrive consistently spreading out drive forces perfectly between the two axles and minimising both under- and oversteer in the process.

Apart from this significant improvement of agility and driving pleasure, xDrive also ensures a substantial increase in driving safety, BMW’s DSC stability control system therefore intervening far later in many cases than would be required with a conventional all-wheel-drive concept.

Better traction, particularly on snow and loose ground.
With BMW xDrive reacting within fractions of a second, the system offers enormous advantages also in terms of traction. When setting out on slippery or loose ground, for example, the time-lag between the loss of wheel grip on the surface and the re-distribution of drive forces to wheels with grip is only a few milliseconds. So xDrive elegantly solves and eliminates the usual prob*lems otherwise encountered so often when setting off, without the driver even noticing what is happening.

abuReem
15-07-2005, 03:12 PM
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