ZF reveals eAMT for hybridisation of small and compact cars
ZF has revealed its new eAMT (electrified Automated Manual Transmission) technology. This is an innovative concept for the hybridisation of front-transverse vehicles that integrates the company’s electric axle drive system (eVD) and an automated manual transmission (AMT) into 1 system. The transmission actuator and the electric rear axle operate together with intelligent interaction. This results in the eAMT concept no longer experiencing tractive force interruption. The electric motor bridges the gap in accelerative force of the AMT. In addition to the hybrid functions of electric drive and recuperation and boost, eAMT also features electric all-wheel drive. ZF software regulates the networking and coordination of the IC engine, electric motor and automated transmission.
For the hybridisation of pricesensitive small to compact vehicles with front-wheel drive, the greatest challenges are currently additional cost and development effort as well as limited installation space. Norman SchmidtWinkel, Functional Developer of electric drives at ZF said, “This increases flexibility for vehicle manufacturers. They can use existing platforms to implement conventional drives or plug-in hybrids. The ZF concept integrates an AMT and an electric axle drive system on the rear axle into 1 unit. In some vehicle classes, automatic transmissions are out of the question for reasons of weight, space or cost. In this scenario, the AMT is a great way to significantly increase comfort and efficiency for drivers.”
As a result of electric drive and intelligent drive management, eAMT’s shift comfort and performance are almost on par with more costly torque converter or dual clutch transmissions. As soon as the AMT disengages in order to engage a new gear, there is a tractive force interruption. This is normal for AMTs due to their design. With its Traction Torque Support function, the new eAMT almost completely compensates for this short break in accelerative force. The electric drive on the rear axle precisely bridges this break with a perfectly timed insertion of torque.