Combustion Engine Control Unit, Basic Function - GF07.08-P-9890A
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Engine All (CAR)
Fig 1: Combustion Engine Control Unit Components Location - Engine All (CAR) (Illustration Of Engine 256)
Example illustration of Engine 256
Overview
This document contains information on:
- General
- Function
General
The combustion Engine control unit is the central control unit for the Engine management functions. It also performs gateway functions for other control units.
The combustion Engine control unit is located in the Engine compartment, usually on the combustion Engine.
Function
The combustion Engine control unit intervenes in the following functions:
- Engine management
- Fuel system (fuel supply system, mixture formation, fuel preheating)
- Heat management
- Exhaust aftertreatment
- Charging
To execute these functions, the combustion Engine control unit basically processes the following input factors:
- High-pressure side fuel pressure (fuel distribution)
- Low-pressure side fuel pressure
- Throttle valve position
- Fuel temperature
- Boost pressure
- Charge air temperature
- Coolant temperature
- Soot particulate filter pressure differential
- Crankshaft position
- Position of the camshaft
- Oil pressure
- Oil level, oil temperature, oil quality
- Low-pressure side exhaust gas recirculation temperature
- Position of low-pressure side exhaust gas recirculation actuator
- Position of high-pressure exhaust gas recirculation actuator
- Air mass
- Crash signal
The combustion Engine control unit processes these input factors and basically transmits the following actuations:
- Throttle valve actuator
- Divert air switchover valve
- Fuel injectors
- For Diesel Engines: glow output stage
- Boost pressure control flap
- Low-pressure/high-pressure exhaust gas recirculation actuator
- Quantity control valve
- Alternator
| Components | |||
| Pressure sensor downstream of air filter, basic function | Engine All (CAR) | GF07.04-P-2003A | |
| Intake manifold pressure sensor, basic function | Engine 282 | GF07.04-P-2008A | |
| Pressure sensor upstream of throttle valve, basic function | Engine 282 | GF07.04-P-2009A | |
| Hot film mass air flow sensor, basic function | Engine 608, 654, 656 | GF07.07-P-2000A | |
| Charge air pressure and temperature sensor, basic function | Engine 139, 177, 254, 256, 260, 264, 279, 608 | GF09.41-P-2000A | |
| Charge air temperature sensor downstream of throttle valve, basic function | Engine 282 | GF09.41-P-2002A | |
| Boost pressure control flap actuator, basic function | Engine All (CAR) | GF09.50-P-2001A | |
| Camshaft Hall sensor, basic function | Engine All (CAR) | GF15.10-P-2001A | |
| Integrated starter alternator, basic function | Model All (CAR) | GF15.40-P-1000A | |
| Engine oil temperature sensor, basic function | Engine 133 | GF18.30-P-2000A | |
| Basic function of Engine oil pressure and temperature sensor | Engine 139 | GF18.40-P-2004A |