CDI post-injection, function - GF07.16-P-2010P
ENGINE 642 in MODEL 164.1 /8, 203.0 /2, 209.3 /4, 211.0 /2 /6, 219.3, 221.0 /1, 251.0 /1
ENGINE 642 in MODEL 463.3
ENGINE 642 in MODEL 461.3
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 injectors | Y76 | GF07.03-P-6120P | |
| Component description for the crankshaft Hall sensor | B70 | GF07.04-P-6220P | |
| Component description for the coolant temperature sensor | B11/4 | GF07.04-P-6040P | |
| Component description for the 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 the temperature sensor upstream of the 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 the 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 the 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 the rail pressure sensor | B4/6 | GF07.04-P-6210P | |
| Component description for the quantity control valve | Y94 | GF07.05-P-6010P | |
| Component description for the pressure regulator valve | Y74 | GF07.05-P-6020P | |
| Component description for the 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 the 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-2010GZ | ||
| 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 the 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 |