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<br /> <br />EPA <br /> <br /> <br />Aftertreatment Regeneration <br /> <br /> <br />Intake <br />Throttle ~ <br />Valve ~ <br /> <br />Doser: <br />· Meters fuel mist into exhaust <br /> <br />Aftertreatment <br />Device: <br />· Passive Regeneration <br /> <br />· Dosing to force <br />regeneration <br /> <br />EGR~"'" <br />Valve EGR <br />Cooler <br /> <br />~~ <br /> <br />DOC DPF <br /> <br /> <br /> <br />'\~~{?&~~~1!~~~f/~ <br /> <br />Caterpillar <br />Regeneration <br />System <br /> <br />2-Stage <br />Turbocharger <br /> <br />III CGI Mixing <br />Valve <br />III CGI Cooler Aftertreatment <br />_.=- Device <br />..~'i<'4-;o;.~- <br /> <br />~ _ Clean Gas <br />~~ Induction (CGI) Line <br /> <br />1 <br /> <br /> <br />Engine Derate <br />lnitlat~d <br /> <br />Engine Shutdown <br /> <br />Service <br /> <br />Stationary High Idle <br /> <br />Soot --------------------------------------- <br />Level <br /> <br /> <br />"Automatic" Active <br />Regeneration <br /> <br />Passive <br />Regeneration <br /> <br />Time <br /> <br />Filter Regeneration Strategy <br /> <br />Passive Regeneration <br /> <br />· Exhaust temperatures generates enough <br />heat to burn soot and turn it into carbon <br />dioxide and water ----)- ash. <br /> <br />· Filter backpressure is reduced <br /> <br />Active Regeneration <br />· Exhaust Gas Temps >600oC/11 OooF <br /> <br />· Exterior Spatial Temperature Range <br />250oC/480oF to 3000C/5700F Skin/Body/ <br />V-Band <br /> <br />· Interior filter remains hot for a long period <br />of time (order of hours) <br /> <br />swers <br /> <br />59 <br />