Off-Highway Diesel Engine Ratings - John Deere Industrial Engines

PowerTech E •••••••••••••••••••••••••••••••••••••••••••••••••••••••••2.4L, 3.0L, 4.5L, and 6.8L enginesCooled airfrom intercoolerFixed geometryturbocharger2-valveheadElectronic Unit Pump (EUP) fuel systemRegulated rated speed flexibility and improved cold-start andwarm-up control (2.4L and 3.0L).Fixed geometry turbochargerFixed geometry turbochargers are precisely matched to thepower level and application.TurbochargedIn turbocharged engines, the air is pre-compressed. Due to thehigher pressure, more air is supplied into the combustionchamber allowing a corresponding increase in fuel injectionwhich results in greater engine output (2.4L, 3.0L, and 4.5L).PowerTech E enginesHigh-PressureCommon Railfuel systemHot compressed airfrom turbochargerAir-to-air intercoolingThis is the most efficient method of cooling intake air to helpreduce engine emissions while maintaining low-speed torque,transient response time, and peak torque. It enables an engineto meet emissions regulations with better fuel economy and thelowest installed costs.Compact sizeMounting points are the same as Tier 2/Stage II engine models.2-valve cylinder headCross-flow head design provides excellent breathing from alower-cost 2-valve cylinder head.High Pressure Common Rail (HPCR) andEngine Control Unit (ECU)The HPCR fuel system provides variable common rail pressure,multiple injections, and higher injection pressures, up to 1600 bar(23,000 psi). It also controls fuel injection timing and providesprecise control for the start, duration, and end of injection (4.5Land 6.8L).Multiple injection strategyThe new HPCR fuel system and engine control unit (ECU)allow for multiple fuel injections. The number of fuel injections,based on speed and load, help contribute to lower combustiontemperatures, which reduce the formation of NOx andparticulates. The multiple injection strategy also providesan added benefit of noise reduction (4.5L and 6.8L).1213