ZF re­veals eAMT for hy­bridi­s­a­tion of small and com­pact cars

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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.

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