4RM Ferrari is a new four-wheel drive system, which is patented Ferrari.
1.4RM What is
4RM each wheel can be accurately predict the maximum torque can be transmitted to the road surface without slipping, the system can separate the maximum torque assigned to each wheels. 4RM also incorporates a number of control functions Ferrari F1-Trac, E-Diff, PTU, etc., the software control system can predict adhesion in advance. And can accurately dispense an appropriate amount of torque to each wheel to achieve control of the traction and stability.
2.4RM advantages
* compared with the 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.
3.4RM 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) axle gearbox is located on, directly connected to the engine, a 7-speed double-clutch gearbox main rear axle.
[] Pre two speed gearbox does not pass through the main power transmission of the front axle, but is passed directly through the pre-gearbox, dual-clutch gearbox 7-speed power transmission is responsible for the rear axle.
[post] 7-speed dual clutch transmission of the engine power is transmitted directly by the crankshaft to the front gearbox, this gearbox multiplate clutch allocated to the left and right wheels by electric power, so Ferrari FF front axle and no 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, engages the second transmission gear transmission, when the main gearbox is in 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. In most cases, all or a FerrariAfter Taiwan standard drive supercar. Traffic computer only when required calculated power output shaft forward, the clutch will be pre-bound transmission, the driving wheel speed to achieve.