At the European All-Whell Drive Congress Graz (Austria) ZF has introduced its new all-wheel drive for front-mounted transverse cuts the increased consumption brought about by this type of traction. The aim, in which case most of the driving situations in which the four-wheel drive is not required: the straight-line traction placed on all four wheels offers no benefits in terms of dynamism and agility.
As soon as the road surface or driving style change, the two driving axles can express their full potential. To take advantage of four-wheel drive while maintaining low power consumption, it is necessary to activate and deactivate the traction on all four wheels in a timely and imperceptible to the driver within fractions of seconds.
Only in this way you can have full, at the right time and with maximum efficiency of the functionality of all-wheel drive. That's what I promise to do the 4x4 vehicles equipped with front-wheel-cross and the new 9-speed automatic transmission with ZF decoupled system: 2WD front-wheel drive in the entire drive train stops - from the right angle to the cardan shaft rear differential.
The automatic decoupling takes place on the front directly downstream of the transmission based on the bridge and through a joint on the wheel left and right. Components of four-wheel drive so you will avoid loss of traction that increase consumption. The structure of the optimal weight of the all-wheel drive results in a reduced consumption of fuel: in the complex provides a potential savings of 5%.
This reduction in consumption is in the interests of both the end customer, is that the manufacturers would have more help in order to comply with EU legislation on CO2 emissions. Besides the reduction of consumption by the full decoupling, the ZF system also offers advantages in terms of driving dynamics.
The two joints on the rear allow a free transverse distribution of torque between the rear wheel left and right. Through the classic concept of "hang-on" (distribution of torque as needed between the front and rear) is also possible to exploit the effect of torque vectoring: the yaw moment of the vehicle would then be actively influenced by the command of the individual rear wheels.
On variable road surfaces or curved so also improve grip and stability. 
As soon as the road surface or driving style change, the two driving axles can express their full potential. To take advantage of four-wheel drive while maintaining low power consumption, it is necessary to activate and deactivate the traction on all four wheels in a timely and imperceptible to the driver within fractions of seconds.
Only in this way you can have full, at the right time and with maximum efficiency of the functionality of all-wheel drive. That's what I promise to do the 4x4 vehicles equipped with front-wheel-cross and the new 9-speed automatic transmission with ZF decoupled system: 2WD front-wheel drive in the entire drive train stops - from the right angle to the cardan shaft rear differential.
The automatic decoupling takes place on the front directly downstream of the transmission based on the bridge and through a joint on the wheel left and right. Components of four-wheel drive so you will avoid loss of traction that increase consumption. The structure of the optimal weight of the all-wheel drive results in a reduced consumption of fuel: in the complex provides a potential savings of 5%.
This reduction in consumption is in the interests of both the end customer, is that the manufacturers would have more help in order to comply with EU legislation on CO2 emissions. Besides the reduction of consumption by the full decoupling, the ZF system also offers advantages in terms of driving dynamics.
The two joints on the rear allow a free transverse distribution of torque between the rear wheel left and right. Through the classic concept of "hang-on" (distribution of torque as needed between the front and rear) is also possible to exploit the effect of torque vectoring: the yaw moment of the vehicle would then be actively influenced by the command of the individual rear wheels.
On variable road surfaces or curved so also improve grip and stability.
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