Perkins 1204F-E44TA Systems Operation Testing And Adjusting page 52

52
Engine Operation
Aftertreatment System with a DOC, and DEF system
Illustration 44
Block diagram for the aftertreatment system with a DOC and DEF system
(31) Diesel Exhaust Fluid (DEF) level sensor
(32) DEF temperature sensor
(33) Coolant diverter valve
(34) DEF header unit
(35) Dosing Control Unit (DCU)
(36) DEF tank
(37) Heated DEF line
(38) Heated DEF line
(39) DEF pump heater
Sensor Locations for the Engine
The illustrations in this section show the typical
locations of the sensors for the industrial engine.
Specific engines may appear different from the
illustration due to differences in applications.
This document has been printed from SPI2. NOT FOR RESALE
(40) Inlet NOx sensor
(41) Diesel Oxidation Catalyst (DOC) inlet
temperature sensor
(42) DEF filter
(43) Exhaust Back Pressure Regulator
(EBPR)
(44) Diesel Oxidation Catalyst (DOC)
(45) Heated DEF line
(46) DEF dosing pump
UENR4490-01
(47) DEF injector
(48) Selective Catalytic Reduction (SCR)
catalyst
(49) Ammonia Oxidizing (AMOX) catalyst
(50) SCR inlet temperature sensor
(51) Outlet NOx sensor
(52) Ammonia sensor
(53) Identification module
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