1
What is?
4RM Ferrari is a new four-wheel drive system, which is patented Ferrari.
2
You know what?
4RM each wheel can be accurately predict the maximum torque can be transmitted to the road surface without slipping, the system can assign a separate maximum torque to each wheel.
4RM also incorporates a number of control functions Ferrari F1-Trac, E-Diff, PTU and the like, the control system software can predict in advance adhesion. And can accurately dispense an appropriate amount of torque to each wheel to achieve control of the traction and stability.
3
Advantages:
– and compared to a conventional four-wheel drive system, and lighter weight.
· able to predict ground adhesion, cornering traction and stability control.
* only transfer torque to the front axle when necessary, to increase driving pleasure.
4
Principle:
4RM system comprises two sets of transmission, a total of nine forward gears, front two forward gears (reverse gear is also arranged in front gearbox) gearbox is located the front axle, is directly connected to the engine, a 7-speed double-clutch gearbox main rear axle.
[Pre two speed gearbox]
through the main power transmission of the front axle is not, but directly via the front shift boxes for delivery, 7-speed dual clutch transmission is responsible for the rear axle of the power transmission.
[post] 7-speed double clutch gearbox
by the crankshaft of the engine power is transmitted directly to the front gearbox, this gearbox the multi-plate clutch controlled by an electric power distribution to the left and right wheels, thus not Ferrari FF front axle differential.
When the master transmission is in gear 1, the transmission of the first transmission gear engaged when the main gearbox gears 3 and 4, the shift box second transmission gear engaged when the main gearbox is in the 5-speed or more-speed gear 5, the front axle will not continue to receive power, at which time all the torque will be transmitted to the rear axle.
at 
In most cases, Ferrari are still after a standard ultra-running drive. Traffic computer only when required calculated power output shaft forward, the clutch will be pre-bound transmission, the driving wheel speed to achieve.