Engine Management, Basic Function - GF05.00-P-9901A

Engine all (CAR) 

General 

The engine management system includes all processes that are essential in order to achieve economic and ecological engine operation. It includes various subsystems that influence the running of the engine through checking, optimizing or regulating it.

In order to influence the running of the engine, the engine management system records sensor data directly or via bus systems. The engine management system processes these sensor data and controls the required actuators in order to carry out the required function.

Engine management 

The engine management is subdivided into the following systems:

• Basic system functions
• Engine system
• Mixture formation
• Air control system
• Heat management

Basic system functions 

• Control unit diagnosis
• Fault memory
• European On-Board Diagnostics (EOBD)
• Diagnosis via CAN
• CAN network
• Flash programming
• Transport mode
• Variant coding
• Drive authorization system 4 (DAS 4)
• Torque coordination
• Heat management
• Alternator control function
• Synchronization
• Load determination
• Maximum vehicle speed limit

Diagnosis

For diagnostic purposes, the fault codes of the engine management system can be read out and deleted using XENTRY Diagnostics, and individual diagnostic functions can be specifically actuated.

CAN network

The combustion engine control unit exchanges data with other control units that are integrated into the CAN network. The combustion engine control unit is also connected to the drive LIN and exchanges data via it.

Flash programming

The engine management in the combustion engine control unit is flashable, meaning that the complete software in the control unit can be exchanged using XENTRY Diagnostics (replaced).

Variant coding

Using variant coding, the following vehicle versions and equipment can be coded using XENTRY Diagnostics:

• Vehicle model
• National version
• Exhaust variants
• Transmission version

Engine system 

• Starter relay actuation
• Throttle valve control
• Safety fuel shutoff
• Camshaft adjustment and valve lift changeover
• Transmission overload protection
• Support of the Electronic Stability Program (ESP®)
• Support for fully integrated transmission control (VGS)
• Driving on torque limitation
• Anti-jerk control
• Suction fan actuation
• For spark-ignition engines: ignition system
• For diesel engines: glow system
• Controlling the ECO start/stop function

Mixture formation 

• RPM increase for an activated A/C
• RPM limitation
• High-pressure pump control
• Altitude adaptation
• Fuel high pressure control
• Fuel pump controlling
• Load change function
• Smooth running control
• Idle speed control
• Engine limp-home mode
• Inertia fuel shutoff
• Start, post-start phase and acceleration enrichment
• Pre, main and post injection
• Warm-up control
• Cylinder-selective DI

Air control system 

• Exhaust gas recirculation (EGR)
• Charge pressure control
• Intake air throttling through intake port shutoff (EKAS)