1. Different systems
1. xdrive
xDrive intelligent all-wheel drive system BMW’s patented xDrive sets a new benchmark in all-wheel drive sensitivity. standard. Its job is to quickly change the torque distribution of the front and rear axles to provide real driving stability, driving pleasure and safety performance.
2. idrive
"iDrive" is the abbreviation of "intelligent-Drive system", which is a new, simple, safe and convenient future driving concept .
2. Different principles
1. xdrive
The core technology of the xDrive all-wheel drive system is developed by Magna Steyr of Austria. actuator to continuously adjust the torque distribution.
The xDrive system continuously changes the torque distribution according to the road conditions, transmitting the required torque to the front and rear wheels. The default front-to-rear torque distribution is 40:60, and the maximum front-to-rear torque distribution ratio is 0:100 to 100. : between 0. Torque distribution can be completed in 0.1 seconds.
2. idrive
The traditional "handbrake" in BMW's new 7 Series has been replaced by the parking button. The driver only needs to press the parking button on the instrument panel to "stop and start" the vehicle steadily on a sloped road.
The parking button also provides the driver with some wonderful uses in other situations. For example, deceleration control can be performed while driving, and this button function can perform reasonable power distribution and driving state control when climbing hills or stopping in traffic jams.
3. Different characteristics
1. xdrive
During driving, if the system detects that the vehicle may understeer, that is, the front wheels begin to be dragged toward the curve. On the outside, the torque allocated to the front axle is reduced, sending almost all the power to the rear axle.
2. idrive
iDrive has a memory function. The driver can save certain settings and the information will be automatically stored in the car "key". The car key of the BMW 7 Series is a smart card. After entering the car, put it into the socket, and then simply press the "Start/Stop" button to start/stop the engine.
Baidu Encyclopedia-xdrive
Baidu Encyclopedia-iDrive