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EC-1450
[YD (WITH EURO-OBD)]
DPF
SYSTEM DESCRIPTION
*: This signal is sent to the ECM through CAN communication line.
NOTE:
In addition to the controls described above, ECM performs fuel injection control and EGR volume control for the regeneration.
ECM estimates the amount of particulate matter in DPF based on the mileage and the differential exhaust
pressure. ECM automatically performs regeneration when the amount of particulate matter in DPF reaches
the specified level. When performing regeneration, ECM raise the exhaust gas temperature to activate Oxida-
tion Catalyst. ECM performs the followings to raise exhaust gas temperature.
● Closing throttle valve to reduce intake air volume
● Retarding fuel injection timing
● Injecting additional fuel into combustion chamber during exhaust stroke (post injection)
● Performing EGR control
PBIB3163E
Sensor Input Signal to ECM ECM Function Actuator
Crankshaft position sensor Engine speed
Regeneration
control
● Fuel injector
● Electric throttle control
actuator
Camshaft position sensor Piston position
Engine coolant temperature sensor Engine coolant temperature
Mass air flow sensor Amount of intake air
Combination meter Vehicle speed*
Differential pressure sensor Differential pressure
A/F sensor 1 Density of oxygen in exhaust gas
Front exhaust gas temperature sensor Front exhaust gas temperature
Rear exhaust gas temperature sensor Rear exhaust gas temperature
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