ZF (8HP): Automatic gearbox 8 ratios.

For its new automatic gearbox eight reports (8HP), the OEM ZF wanted to offer a compatibility with hybrid systems and Stop-and-Start ".

First of all thanks to the action of a pump sending oil under pressure in the gearbox to give the necessary impetus to each restart for the stop-and-start system.

Then, the eight ratios gearbox can combines with semi and full-hybrid devices and in the case of semi hybrid, an electric motor (called Dynastart) is directly integrated into this box and its power can vary, depending on the demands of car manufacturers between 14 and 140 hp. This additional power system is already installed on the Mercedes S400 Hybrid. This automatic transmission provides smoothly and dynamism to the car, but also reduce fuel consumption.

Already present on new models A8 and Q7, Audi plans to equip from 2011 the next 2.0l TFSI Quattro engine of the A4 sedan and wagon, the A5 coupe and convertible and Q5 of the new automatic transmission with 8 gears.

It is also found on the BMW 760i and 5 Serie Gran Turismo and will be installed on the 7 serie hybrid as well as Bentley Mulsanne and Rolls-Royce Ghost.

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ZF 8HP gearbox