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C7 with ACERT ® TechnologyBuilt for power reliability, economy and low emissions.Cat C7. The Cat C7 with ACERT ®Technology introduces a series ofevolutionary, incremental improvementsthat provide breakthrough enginetechnology. The building blocks ofACERT Technology are fuel delivery,air management and electronic control.ACERT Technology optimizes engineperformance while meeting engineemission regulations for off-roadapplications. For regulated territoriesor when selected as an attachment, the329D L meets U.S. EPA Tier 3 and EUStage III engine emission requirements.Performance. The 329D L, equipped withthe C7 engine with ACERT Technology,provides 12% more horsepower ascompared to the 3126B ATAAC HEUIin the 325C L.Automatic Engine Speed Control.The two-stage, one-touch controlmaximizes fuel efficiency and reducessound levels.ADEM A4 Engine Controller.The ADEM A4 electronic controlmodule manages fuel delivery to get thebest performance per liter of fuel used.The engine management system providesflexible fuel mapping, allowing theengine to respond quickly to varyingapplication needs. It tracks engine andmachine conditions while keeping theengine operating at peak efficiency.Electronic Control Module.The Electronic Control Module (ECM)works as the “brain” of the engine’scontrol system, responding quickly tooperating variables to maximize engineefficiency. Fully integrated with sensorsin the engine’s fuel, air, coolant, andexhaust systems, the ECM stores andrelays information on conditions suchas rpm, fuel consumption, and diagnosticinformation.Fuel Delivery. The Cat C7 featureselectronic controls that govern the fuelinjection system. Multiple injectionfuel delivery involves a high degreeof precision. Precisely shaping thecombustion cycle lowers combustionchamber temperatures, generatingfewer emissions and optimizing fuelcombustion. This translates into morework output for your fuel cost.Cooling System. The cooling fan isdirectly driven from the engine.An electrically controlled viscousclutch fan is available as an attachmentto reduce fan noise. The optimum fanspeed is calculated based on the targetengine speed, coolant temperature,hydraulic oil temperature and actualfan speed. The Cat C7 delivered acompletely new layout that separatesthe cooling system from the enginecompartment.Air Cleaner. The radial seal air filterfeatures a double-layered filter core formore efficient filtration and is located ina compartment behind the cab. A warningis displayed on the monitor when dustaccumulates above a preset level.Noise Reduction Technologies.The engine mounts are rubber-isolatingmounts matched with the engine package.Further engine noise reduction has beenachieved through design changes tothe isolated top cover, oil pan, multipleinjection strategy, insulated timingcover, sculpted crankcase and geartrain refinements.4