CDI post-injection function - GF07.16-P-2010P

ENGINES 642 in MODEL 203.0, 164.1/8, 221.1/0, 251.0, 203.2, 251.1 up to model year 2008/YoM 07 

ENGINES 642.9 in MODEL 463.3 

ENGINES 642 in MODEL 461.3 

ENGINES 642 in MODEL 211.6, 219.3, 209.4/3, 211.2/0 

Post-injection follows main injection.

Secondary injection serves to increase the exhaust gas temperature and to support the conversion process of exhaust gas components in the oxidation catalytic converter.

For model 211.022 with OM 642.920 and code (494) USA version 1st post injection serves to increase the temperature for regeneration of the NOX catalytic converter.

On vehicles with code (474) Particulate filter, for the purpose of regeneration of the diesel particulate filter (DPF), injection is repeated. This occurs if an appropriate load condition of the DPF was established with the aid of the pressure differential sensor (DPF) (B28/8) (except model 463) and the pressure differential sensor (TWC) (B28/8) (model 463). The 2nd post injection increases the exhaust temperature and the regeneration process is triggered.

The particulate matter (particles) PM in the exhaust gas is subsequently burned.

The quantity of the post-injection is calculated by the CDI control unit (N3/9) while taking account of information from the following sensors:

• Temperature sensor upstream of turbocharger (B19/11), for temperature control of the regeneration of the NOx catalytic converter for model 211.022 with OM 642.920 and code (494) USA version
• Rail pressure sensor (B4/6), for the rail pressure
• Boost pressure sensor (B5/1), for the boost pressure
• Coolant temperature sensor (B11/4), for the coolant temperature
• Charge air temperature (B17/8), for the charge air temperature
• Pressure sensor downstream of air filter (B28/5), for the absolute pressure (vacuum) in the intake tract (except model 463)
• Pressure sensor downstream of air filter, right cylinder bank (B28/5), for the absolute pressure (vacuum) in the intake tract (only model 463)
• Differential pressure sensor for the DPF load condition

Post-injection is not initiated by the CDI control unit if one of the following statuses is present:

• The preinjection time is exceeded
• The detected engine speed is too high
• The calculated quantity of post-injection is too small
• The quantity of main injection is too low
• The rail pressure is too low
• The engine is switched off

Information on coolant temperature, charge air temperature and atmospheric pressure is used to correct the post-injection quantity.

Component description for fuel injector	Y76	GF07.03-P-6120P
Component description for crankshaft Hall sensor	B70	GF07.04-P-6220P
Coolant temperature sensor, component description	B11/4	GF07.04-P-6040P
Component description for charge air temperature sensor	B17/8 Model 164.8, 203.0/2, 209.3/4, 211.0/2/6, 219.3, 221.0/1, 251.0/1, 463	GF07.04-P-6050P
	B17/8 Model 461	GF07.04-P-6050GX
Component description for temperature sensor upstream of turbocharger	Engine 642.920 in model 211.022 with code (494) USA version Model 221.0/1 B19/11	GF07.16-P-3021SX
Component description for boost pressure sensor	B5/1 Model 164.1/8, 203.0/2, 209.3/4, 211.0/2/6, 219.3, 221.0/1, 251.0/1, 463	GF07.04-P-6051P
	B5/1 Model 461	GF07.04-P-6051GX
Component description for pressure sensor downstream of air filter	B28/5 Model 164.1/8, 203.0/2, 209.3/4, 211.0/2/6, 219.3, 221.0/1, 251.0/1, 463	GF07.04-P-6061P
	B28/5 Model 461	GF07.04-P-6061GX
Component description for rail pressure sensor	B4/6	GF07.04-P-6210P
Component description for quantity control valve	Y94	GF07.05-P-6010P
Pressure regulator valve, component description	Y74	GF07.05-P-6020P
Component description for CDI control unit	Model 203, 209 N3/9	GF07.16-P-6000P
	Model 211, 219 N3/9	GF07.16-P-6000T
	Model 164, 463 N3/9	GF07.16-P-6000GZ
	Model 221 N3/9	GF07.16-P-6000SX
	Model 251 N3/9	GF07.16-P-6000RT
	Model 461 N3/9	GF07.16-P-6000GX
Component description for diesel particulate filter	Model 203, 209 with code (474) Particulate filter	GF14.40-P-2010P
	Model 211, 219 with code (474) Particulate filter	GF14.40-P-2010T
	Model 164, 463 with code (474) Particulate filter	GF14.40-P-2010G
	Model 221 with code (474) Particulate filter	GF14.40-P-2010SX
	Model 251 with code (474) Particulate filter	GF14.40-P-2010RT
	Model 461 with code (474) Particulate filter	GF14.40-P-2010GX
Component description for diesel particulate filter pressure differential sensor	Model 203, 209 with code (474) Particulate filter B28/8	GF07.04-P-6121P
	Model 211, 219 with code (474) Particulate filter B28/8	GF07.04-P-6121T
	Model 164, 463 with code (474) Particulate filter B28/8	GF07.04-P-6121GZ
	Model 221 with code (474) Particulate filter B28/8	GF07.04-P-6121SX
	Model 251 with code (474) Particulate filter B28/8	GF07.04-P-6121RT
	Model 461 with code (474) Particulate filter B28/8	GF07.04-P-6121GX