Allison Transmission T 270 User Manual

NOTE:Allisonelectroniccontrolsaredesignedandmanufactured
tocomplywithallFCCandotherguidelinesregardingRadio
FrequencyInterference/ElectromagneticInterference(RFI/EMI)for
transportationelectronics.Manufacturers,assemblers,andinstallers
ofradio-telephoneortwo-waycommunicationradioshavethe
soleresponsibilitytocorrectlyinstallandintegratethosedevices
intoAllisonTransmission-equippedvehiclestothecustomer's
satisfaction.
8.5AUTODETECT
TheAutodetectsoftwarefeatureautomaticallydetectsthepresenceof
transmissioncomponentsorinputsignals,thuspermittingtheuseofdifferent
featuresorinputsignalswithacommonTCM.Autodetectchecksforthe
presenceofavalidinputsignaldenotingthepresenceofeachofthefeatures
listed.Diagnosticfunctionsrelatingtoeachoftheseitemsareexecutedif
thefeatureisdetectedandused.RefertoT able8–1forthepresenceofthe
followingtransmissioncomponentsordatainputs.
Table8–1.AutodetectFeatures
OutputRetarderPresence
Autodetect
OilLevelSensor(OLS)Presence
Autodetect
8.6ADAPTIVESHIFTING
Adaptiveshiftingisabasicdesignfeatureoftheshiftcontrolswhich
optimizesshiftquality.Thisisaccomplishedbyfrequentmonitoringofcritical
characteristicsintheclutchengagementprocessandmakingcontinuous
adjustmentstocertaincharacteristicswhichimprovesubsequentshifts.
Thetransmissionshiftcalibrationisbasedonseveraldifferenttypesofshifts,
suchasfullthrottle,partthrottle,closedthrottle,upshifts,anddownshifts.
Eachshiftisassociatedwithspecicspeedandthrottlepositionparameters.
Tooptimizeeachtypeofshiftfornormaldriving,itisnecessaryfortheshift
controlstohaveexperiencedoperationandshiftinginawidevarietyof
operatingconditions.Adrive-inperiodundervariousdrivingconditionsis
requiredbeforetheadaptivecontrolscanbeexpectedtooptimizeeachand
everyshift.Youshouldbegintoseeshiftqualityconvergetotheadaptedlevel
afterveshiftsofaparticularshifttype.
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Allison Transmission T 270 Specifications

General

Brand	Allison Transmission
Model	T 270
Category	Controller
Language	English