Diesel Diagnosis Systems (DDS)

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Basics of Combustion Process Analysis

The modern combustion engine is a highly efficient, high performance machine. The Working Process characteristics depend on the quality of the combustion process inside the cylinders. Combustion Monitoring enables the operator to control the engine so that it runs under the best technical conditions.

What does the Monitoring System give to you?

By using the monitoring system, the operator will be able to:

• Tune the engine for better performance, efficiency and pollution control, as the system presents tuning advice.
• Avoid shutdown and emergency repair, as the system automatically protects the engine against dynamic and temperature overload.
• Predict and schedule necessary maintenance, as the system tracks the engine’s work history.

Cylinder Working Process Parameter Definitions

Figure 2.1

What does the Monitoring System measure?

The Monitoring System initially takes 3 Fundamental Measurements (Figure 2.1):

• Crankshaft position
• Cylinder Gas Pressure
• Fuel Pump or Injector Vibration

What does the Monitoring System calculate?

The system applies Combustion principles and derives all other relevant Working Process Parameters:

How does the system translate the cylinder pressure into Advice and Alerts?

• The Measurement sub-System measures the Gas Pressure inside the cylinders. (Figure 2.1)
• The Processor sub-System calculates the engine parameters such as Power, Maximum Combustion Pressure, etc. (Table 2.1, column 1)
• The Analysis sub-System compares the calculated parameter values with preset limitations. (Table 2.1, column 2)
• The Messaging sub-System sends Alerts about the current conditions and gives Advice for engine loading and tune-up. (Table 2.1, column 4)

Example of Engine Working Process Parameter’s Translation   Table 2.1

General Information: