Peterbilt 348 2017 - Fuel - Excess Consumption

DRIVINGTIPSANDTECHNIQUES
UseofTachometer
Thetachometerisaninstrumentthat
aidsinobtainingthebestperformance
oftheengineandmanualtransmission,
servingasaguideforshiftinggears.
RefertotheEngineOperationand
Maintenancemanualforoptimum
enginerpm.
•Iftheenginerpmmovesbeyond
themaximumgovernedspeed,
indicatinganoverspeedcondition,
applytheservicebrakeorshiftto
ahighergeartobringenginerpm
withintheoptimumspeedrange.
•Whendrivingdownhill:shifttoa
lowergear,usetheenginebrake
(ifsoequipped),andusethe
servicebrake,keepingtheengine
speedbelow2,100rpm.
Whentheenginespeedreaches
itsmaximumgovernedspeed,the
injectionpumpgovernorcutsofffuel
totheengine.However,thegovernor
hasnocontrolovertheenginerpm
whenitisbeingdrivenbythevehicle's
transmission,forexample,onsteep
downgrades.Applyservicebrakesor
shifttoahighergear.
Fueleconomyandengineperformance
arealsodirectlyrelatedtodriving
habits:
•Thebestresultsintriptimeand
fueleconomyareobtainedwhile
drivingthevehicleatasteady
speed.
•Shiftintohigherorlowergears(or
applytheservicebrake)tokeep
enginerpmnearthelowerendof
theoptimumoperatingrange.
•Avoidrapidaccelerationand
braking.
Fuel-ExcessConsumption
Thevehicle'sfuelconsumptionis
connectedtothreeimportantfactors:
maintenance,drivinghabits,and
generalconditionoftheroad,trafc
conditions,andvehicleload.
4-64Y53-6060-1C1(03/17)
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