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Mercedes-Benz M 447 hLAG User Manual

Mercedes-Benz M 447 hLAG
83 pages
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MERCEDES-Benz
Service
___________________________________________________________________
Mercedes-Benz AG Omnibus Product Division
Status September 2003 (EvoBus-Service / AFT)
Natural Gas Engine: M 447 hLAG
In Mercedes-Benz City Bus
Click bus for index
The
EGM
engine control unit

Table of Contents

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Mercedes-Benz M 447 hLAG Specifications

General IconGeneral
BrandMercedes-Benz
ModelM 447 hLAG
CategoryEngine
LanguageEnglish

Summary

Abbreviations

Technical Terminology Definitions

Lists and defines technical terms and acronyms used in the manual.

Natural Gas Engine M 447 hLAG

Engine Overview and Technical Data

Details the M 447 hLAG engine's specifications, variants, and emission levels.

Functional Description of EGM

Introduction and Core Functions

Introduces the EGM control unit and covers torque control, engine states, and basic operations.

Engine Protection and Idling Control

Details engine protection functions and idling speed control mechanisms.

Fueling and Ignition Control

Details cylinder filling, gas injection processes, and ignition system control.

Electrical Description of EGM

System Interface and Block Diagram

Illustrates EGM electrical interfaces, connectors, and system integration.

Power Supply and Consumption

Covers EGM power supply, consumption, and short-circuit protection.

Sensor and Actuator Technology

Details sensors and actuators managed by the EGM, including technical data.

Diagnosis and Troubleshooting

Reading Engine Measured Values

Lists and explains diagnostic parameters and measured values available via StarDiagnosis.

EGM-Specific Service Routines

Describes special customer service routines for diagnostics and fault localization.

Troubleshooting Common Engine Issues

Guides on diagnosing and resolving engine failures and performance problems.

Safety Precautions for EGM Work

Outlines essential safety measures to prevent damage and ensure personnel safety.

Appendix

Pulse Width Modulated Signal Explained

Explains PWM signal characteristics used for actuator control.

Overview of EvoBus Systems

Illustrates interconnected bus systems within the vehicle for context.

Index

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