Common rail diesel injection (CDI) - function - GF07.16-P-0001IC: Notes

ENGINE 647.961 in MODELS 211.016 /216 /616 

ENGINE 648.960 in MODELS 220.025 /125 

ENGINE 648.961 in MODELS 211.023 /223 

ENGINE 648.961 in MODELS 211.026 /226 

Cross section of engine 647 

The fuel injection system "CDI 3" is used in engines 647 CDI and 648 CDI (C  ommon Rail D  iesel Injection). The engine is fully controlled by the CDI control unit (N3/9), which controls, regulates and monitors the following systems:

• Fuel injection
• Charge pressure control
• Exhaust gas recirculation
• Electronic accelerator/cruise control/idle speed control
• Drive authorization system stage/immobilizer (DAS 3)
• Diagnosis/DTC memory
• Diesel particulate filter (DPF) (optional for engine 648)

These systems contain the following functions, to name a few:

General base functions 

• Synchronization (fuel injection)
• Load detection
• Starter control
• Interface communication (CAN)
• Version coding

Electronic drive control 

• NAT/AMT support
• TCS/ESP support
• Starting torque limitation

Fuel injection functions 

• Pre and post injection (+ post injection with DPF)
• Rpm limitation
• Fuel pump actuation
• High-pressure pump control (quantity control)
• Rail pressure control
• Inertia fuel shutoff
• Idle speed control
• Smooth running control

Air control function 

• Exhaust gas recirculation control
• Charge pressure control
• Intake port shutoff motor (except engine 648 up to o12/03)

Special functions 

• Altitude adaptation
• Torque interface
• Monitoring concept
• Immobilizer function (DAS 3)
• Diesel particulate filter (optional for engine 648))
• Calculation and expenditure of fuel consumption
• Intake manifold pressure monitoring
• Suction fan control
• Anti-jerk control
• Cruise control (with variable speed limiter)
• Distronic (optional)
• Glow time control
• Glow time and glow voltage control (for model 211 )
• Quantity mean value adaptation (with DPF, EU4, model 211 )

Diagnostic functions 

• Fault memory handling
• Engine control diagnosis
• European On-Board Diagnosis (except ) Model 211 as of 03/03

  Model 220 as of 09/03

• OBD (for model 211 )
• Diagnosis via CAN
• Diagnosis via K-line

CDI control unit versions (Software) 

• EU3
• EU3 up (update)
• (for model 211 with engine 648)
• EU4 (for engine 648)
• EU4 red (derated) (for model 211 with engine 648)

Amongst others, the EU3 up version includes:

• Fuel injection pressure up to 1600 bar
• Fuel injectors (Y76) with precise fuel supply measurement and less drift
• Air-cooled 180 A alternator (G2)with interface and freewheel

The EU4 version also contains:

• Diesel particulate filter (optional)
• O₂ sensor upstream TWC (G3/2)for quantity mean value adaptation

The EU4 red version contains a number of items including:

• EU4VVersion
• Performance reduction through software adjustment for the engine control in the CDI control unit

The USA version (only model 211) contains a number of items including:

• Fuel filter with water separator and fuel filter water level sensor (B76)
• Display in instrument cluster for water separator (A1)
• O₂ sensor upstream TWC for quantity mean value adaptation
• Larger exhaust gas recirculation cooler and left exhaust gas recirculation positioner (Y27/9) with large orifice area (diameter 24 mm) for a large recycled exhaust volume

	Common rail diesel injection (CDI) - location of components	on the engine side	GF07.16-P-0001-01IE
		on the vehicle side	GF07.16-P-0001-01IF
	Common rail diesel injection (CDI) - function diagram	Except for DPF	GF07.16-P-0001-03IJ
		with DPF	GF07.16-P-0001-03IL
	Common rail diesel injection (CDI) - installation survey of models and major assemblies		GF07.16-P-0001-05IC
	Common Rail Diesel Injection (CDI) - control unit input signals		GF07.16-P-0001-06IC
	Common rail diesel injection (CDI) - control unit output signals		GF07.16-P-0001-07IC
	CDI ignition ON function		GF07.16-P-2000IC
	CDI starting function		GF07.16-P-2001IC
	CDI idle speed function		GF07.16-P-2002IC
	CDI driving mode function		GF07.16-P-2003IC
	CDI emission control system function		GF14.00-P-2000IC
	Common rail diesel injection (CDI) - survey of system components, location/task/design/ function		GF07.16-P-9999IE