Ea­ton banks on flex­i­ble, dual-clutch Pro­ci­sion

Auto components India - - COVER STORY - ACI

The lat­est mem­ber of the Ea­ton trans­mis­sion line-up, the all-new Pro­ci­sion 7-speed du­al­clutch au­to­matic trans­mis­sion, can de­liver 8 to 10% bet­ter fuel econ­omy than a sim­i­larly equipped ve­hi­cle with a torque con­verter au­to­matic. To be avail­able glob­ally, it fea­tures a dual clutch de­sign and elec­tronic shift­ing that uses grade, ve­hi­cle weight and throt­tle in­put to pro­vide op­ti­mal fuel ef­fi­ciency and smooth, con­tin­u­ous de­liv­ery of torque to a ve­hi­cle’s wheels un­der all shift con­di­tions.

The all-new Ea­ton Pro­ci­sion is the first dual clutch trans­mis­sion for class 6-7 in North Amer­ica. Its smart fea­tures de­liver more sav­ings and driver con­fi­dence and it is the ideal trans­mis­sion so­lu­tion for medi­um­duty ap­pli­ca­tions. Ea­ton em­ployed the dual clutch tech­nol­ogy to al­low more ef­fi­cient ac­cel­er­a­tion from a stopped po­si­tion, and to op­ti­mise shift points that will ef­fi­ciently get to the high­est gear. Gear changes are made by swap­ping the en­gine torque be­tween clutches with the next gear pre­s­e­lected.

The highly- ef­fi­cient dual clutch tech­nol­ogy with a closed loop con­trol sys­tem sig­nif­i­cantly re­duces slip and steady state losses that are as­so­ci­ated with torque con­verter au­to­matic trans­mis­sions. The dual clutch mo­d­ule is fully con­tained within the trans­mis­sion, hy­drauli­cally con­trolled and oil cooled for ex­tended life. A five-spring damper is used to con­trol tor­sional vi­bra­tions and is fully sealed to elim­i­nate con­tam­i­na­tion. Smart fea­tures such as Ea­ton Dynamic Shift­ing al­low the trans­mis­sion to au­to­mat­i­cally switch be­tween econ­omy and per­for­mance shift sched­ules based on mass, grade and driver de­mand. Base shift re­sults are mod­i­fied dy­nam­i­cally based on avail­able torque, en­gine ac­cel­er­a­tion and grade.

Econ­omy and per­for­mance shift ta­bles can be ad­justed to tune an over­all cal­i­bra­tion to meet any cus­tomer’s spe­cific needs. The cal­i­bra­tion flex­i­bil­ity is the most ever of­fered on an Ea­ton trans­mis­sion.

Own­ers and driv­ers

alike will ap­pre­ci­ate op­tional and ad­justable Urge to Move and Creep Mode, which pro­vides best-in-class lowspeed ma­neu­ver­abil­ity. Op­tional and ad­justable Hill Helper tech­nol­ogy pre­vents roll back or roll for­ward for up to 3 sec­onds while on grades of up to 8%, al­low­ing for a con­trolled launch. With Pro­ci­sion, these fea­tures can be turned on and off us­ing Ea­ton’s Ser­vice Ranger soft­ware. Com­pet­i­tive prod­ucts do not of­fer this type of flex­i­bil­ity.

Bet­ter fuel econ­omy

The Ea­ton Pro­ci­sion trans­mis­sion fea­tures an op­ti­mised de­sign that de­liv­ers 8 to 10% or greater fuel econ­omy im­prove­ment over a torque con­verter au­to­matic. The Pro­ci­sion is fully in­te­grated with Cum­mins Ve­hi­cle Ac­cel­er­a­tion Man­age­ment, which can be used in con­junc­tion with Ea­ton Dynamic Shift­ing to re­duce the im­pact of an ag­gres­sive driver on fuel econ­omy. The op­ti­mised Urge to Move and Creep Mode pro­vide an ex­cel­lent bal­ance of ef­fi­ciency and per­for­mance. These fea­tures can be dis­abled for even greater fuel econ­omy if de­sired. In ad­di­tion, trans­mis­sion load on the en­gine is ac­tively re­duced when the truck is stopped for in­creased fuel econ­omy.

Ea­ton Pro­ci­sion trans­mis­sions utilise a new syn­thetic trans­mis­sion fluid which pro­vides com­po­nent pro­tec­tion while re­duc­ing main­te­nance costs thanks to 150,000 mile lube and fil­ter change in­ter­vals. The in­ter­nal sump fil­ter and elec­tri­cal sys­tem do not re­quire main­te­nance. Brake-ped­alac­tu­ated Tap Down Shift­ing gives the driver more con­trol by down­shift­ing on grades or other con­di­tions with­out re­mov­ing their hands from the wheel or eyes from the road.

Creep Mode al­lows con­trolled low-speed park­ing lot and load­ing dock driv­ing with­out ap­ply­ing the ac­cel­er­a­tor. For­ward and Re­verse creep speeds are in­de­pen­dently ad­justable to al­low a cus­tomised lower speed in re­verse. In Low mode, Au­to­matic Grade Brak­ing down­shifts the trans­mis­sion to help slow the truck on long, steep grades and in­crease brake pad life.

Ea­ton’s Pro­ci­sion trans­mis­sion

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