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EngineThe 12M combines power management with ACERT Technology to deliver maximumpower and efficiency while reducing the environmental impact.ACERT Technology. ACERTTechnology allows Cat enginesto supply more power per unit ofdisplacement without causing prematurewear. This breakthrough technologyreduces emissions during the combustionprocess by using advanced technologyin the air and fuel systems, in conjunctionwith integrated electronics. ACERTTechnology enhances overall engineperformance while dramaticallyreducing exhaust emissions.Fuel Delivery. The C6.6 engine withACERT Technology uses multipleinjection fuel delivery to preciselyshape the combustion cycle. Severalsmall ignitions lower combustionchamber temperatures, generates feweremissions and optimizes fuel combustion.Bottom line: more work output for yourfuel cost.Power Management. The 12M PowerManagement System automaticallydelivers an additional five horsepowerin each forward gear 1st through 4th,and each reverse gear 1st through 3rd.This standard feature optimizes rimpullfor all gears by balancing traction,speed and horsepower while conservingfuel. The system limits horsepower inlower gears, which helps reduce wheelslip where traction is limited. With theVariable Horsepower Plus (VHP Plus)option, an additional five-horsepoweris delivered in each forward gear5th through 8th for more power athigher speeds.Performance. The Cat C6.6 engine meetsspecific performance requirements for12M applications. Its superior torqueand lugging capability can pull throughsudden, short-term increases in loads,maintaining consistent, desirablegrading speeds to get the work donefaster without downshifting.Hydraulic Demand Fan. The hydraulicdemand fan automatically adjustscooling fan speed according to enginecooling requirements. This systemreduces demands on the engine, puttingmore horsepower to the ground andimproving fuel efficiency.Exhaust Emissions Certified. The CatC6.6 with ACERT Technology meetsor exceeds all U.S. EPA Tier 3 andEuropean Union Stage IIIa emissionscontrol standards.12