W07.16-A016-79
A3a | Drive control unit (CPC5) | B622 | Rail pressure sensor | Y616 b1 | Fan rpm sensor | ||
A4 | Engine management control unit (MCM) | B624 | Oxygen sensor | Y621 | Exhaust gas recirculation positioner | ||
B44 | Accelerator pedal sensor | B625 | Fuel pressure sensor (outlet) | Y627 | AdBlue® heater coolant solenoid valve | ||
B600 | Crankshaft position sensor | B626 | Fuel pressure sensor (inlet) | Y628 | Fuel metering valve | ||
B601 | Camshaft position sensor | CAN 4 | Drive train CAN | Y629 | Fuel shutoff valve | ||
B602 | Fuel temperature sensor | Y608 | Cylinder 1 fuel injector | Y634 | Pressure regulator valve | ||
B604 | Oil pressure sensor | Y609 | Cylinder 2 fuel injector | Y635 | Camshaft positioner solenoid | ||
B606 | Exhaust coolant temperature sensor | Y610 | Cylinder 3 fuel injector | Y636 | Boost pressure positioner | ||
B613 | Fresh air differential pressure sensor | Y611 | Cylinder 4 fuel injector | Y637 | Engine brake solenoid valve | ||
B614 | Charge air temperature sensor in compressor housing (engine 936.916) | Y612 | Cylinder 5 fuel injector | Y643 | Quantity control valve | ||
B616 | Charge air pressure and temperature sensor | Y613 | Cylinder 6 fuel injector | A | Input signals | ||
B617 | Charge air temperature sensor in charge air distributor | Y616 | Fan clutch solenoid valve | B | Output signals |
General
During operation, the engine management control unit compares the specified engine torque coming in from the drive control control unit with the current actual engine torque. This is derived from the accelerator pedal's position and provided via the drive train CAN. If the requested engine specified torque is less than the current engine actual torque, the engine management control unit reduces the injection quantity. If the requested engine specified torque is greater than the current engine actual torque, then it increases the injection quantity.
The engine management control unit can limit the specified engine torque sent by the drive control control unit for engine protection reasons. This happens in the following cases:
The coolant temperature exceeds a specific value.
The engine has reached its end or maximum governed speed.
To comply with the maximum permissible speed.
Due to a control intervention function of the anti-lock braking system (ABS) or the acceleration skid control (ASR).
Limitation of the required engine torque always leads to limitation of the injection quantity.
The injection quantity is also dependent on the following input parameters:
Engine speed
Air mass
Coolant temperature
Fuel temperature
If the engine speed falls below 950 rpm, the engine management control unit increases the fuel pressure in the rail via the quantity control valve and activates the cylinder fuel injectors.
The exhaust gas recirculation (EGR) is active throughout the whole driving mode to reduce the nitrous oxide emissions.
The smoke emission limitation and the altitude correction can also influence the injection quantity (actuation period) as well as the start of actuation of the fuel injectors.
Smoke limit
The fuel quantity is limited via the smoke limitation characteristics so that virtually no output of smoke occurs.
Smooth running control
The smooth running control compensates for all of the differences in injection quantity in the individual fuel injectors.
Development of torque on the various cylinders can differ due to tolerances and wear on the individual fuel injectors. This leads to uneven running of the engine. The rotational speed of the crankshaft will always be slightly faster and slower. One particularly feels this when idling. The smooth running control can respond to rough running because it actuates every injection nozzle individually. It balances out the rotational speed fluctuations through slightly different injection quantities for the individual cylinder until all cylinders develop the same torque.
Altitude correction
Altitude correction is primarily designed in such a way that the exhaust gas turbocharger shaft speed, the compressor outlet temperature and the turbine inlet temperature of the exhaust gas turbocharger as well as the air/fuel ratio λ (lambda) do not exceed or fall below defined limits. To do this, the exhaust gas recirculation rate (EGR rate), the actuation start as well as the actuation period (injection quantity) of the fuel injectors are adjusted.
Drive control (CPC) control unit, component description | A3a | ||
Engine management (MCM) control unit, component description | A4 | ||
Accelerator pedal sensor, component description | B44 | ||
Crankshaft position sensor, component description | B600 | ||
Camshaft position sensor component description | B601 | ||
Fuel temperature sensor component description | B602 | ||
Oil pressure switch component description | B604 | ||
Coolant outlet temperature sensor component description | B606 | ||
Component description for fresh air differential pressure sensor | B613 | ||
Charge air temperature sensor in compressor impeller housing, component description | Vehicles with engine 936.916 | ||
Charge air pressure and temperature sensor, component description | B616 | ||
Charge air temperature sensor in charge air housing, component description | B617 | ||
Rail pressure sensor component description | B622 | ||
Component description for an oxygen sensor | B624 | ||
Diesel fuel metering device, component description | Vehicles with code M5Z(Engine version Euro VI) | ||
Component description for fuel injectors | Y608, Y609, Y610, Y611, Y612, Y613 | ||
Component description for the electromagnetic viscous coupling | Y616, Y616 b1 | ||
Component description for exhaust gas recirculation actuator | Y621 | ||
AdBlue heater coolant solenoid valve, component description | Vehicles with code M5Z(Engine version Euro VI) | ||
Pressure regulator valve, component description | Y634 | ||
Camshaft positioner solenoid, component description | Y635 | ||
Component description for boost pressure actuator | On vehicles with engine 936.912 | ||
On vehicles with engine 936.916 | |||
Engine brake solenoid valve component description | Y637 | ||
Component description for the quantity control valve | Y643 |
Referenced documents
- gf0320w4100md Crankshaft position sensor, component description
- gf0520w2110md Camshaft positioner solenoid, component description
- gf0520w4105md Camshaft position sensor component description
- gf0703w6120md Component description for fuel injectors
- gf0704w6101md Component description for an oxygen sensor
- gf0704w6253md Rail pressure sensor component description
- gf0705w6010md Component description for the quantity control valve
- gf0705w6020md Pressure regulator valve, component description
- gf0708w4110md Engine management (MCM) control unit, component description
- gf0940w4020md Component description for boost pressure actuator
- gf0940w4020mda Component description for boost pressure actuator
- gf0941w4110md Charge air pressure and temperature sensor, component description
- gf0941w4125md Charge air temperature sensor in charge air housing, component description
- gf0941w4135md Charge air temperature sensor in compressor impeller housing, component description
- gf1415w3000md Engine brake solenoid valve component description
- gf1420w1003md Component description for fresh air differential pressure sensor
- gf1420w4007md Component description for exhaust gas recirculation actuator
- gf1440w3025md AdBlue heater coolant solenoid valve, component description
- gf1840w2020md Oil pressure switch component description
- gf2000w4100md Coolant outlet temperature sensor component description
- gf2040w2002h Component description for the electromagnetic viscous coupling
- gf3020w2012h
- gf3020w2012h Accelerator pedal sensor, component description
- gf3035w4105h Drive control (CPC) control unit, component description
- gf4750w4100md Fuel temperature sensor component description
- gf4920w3011md Diesel fuel metering device, component description