Denso CRS - DPNR SYSTEM (DIESEL PARTICULATE Nox REDUCTION)

Operation Section
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7.6 DPNR SYSTEM (DIESEL PARTICULATE NOx REDUCTION)
(1) General Description
• This system reduces the emissions of PM (particulate matter) and NOx. The DPNR catalyst mounted in the center
pipe collects and regenerates PM and reduces NOx all at the same time. The collected PM is handled with combus-
tion processing during operation.
(2) System Configuration
Q000911E
Supply Pump
Exhaust Gas Cleaning
Device Switch
Exhaust Gas Cleaning
Device Display Lamp
Injector
DPNR Catalyst
Oxidation Catalyst
A/F Sensor
Exhaust Gas Temperature Sensor
Differential Pressure Sensor
NSR
A/F Sensor
Fuel Addition Valve
Oxidation Catalyst
Before EGR Cooler
Engine ECU
Exhaust
Retarder VSV
Exhaust Retarder
Intake Restriction Valve