COMPRESSION IGNITION ENGINES

Stages of combustion-normal and abnormal combustion – Factors affecting knock, Direct and Indirect injection systems, Combustion chambers, Turbo charging, Introduction to Thermodynamic Analysis of CI Engine Combustion process.

Stages of combustion

Stages of combustion

1. Ignition Delay Period

Stages of combustion

1. Ignition Delay Period

Stages of combustion

2. Period of rapid Combustion

Stages of combustion

3. Period of Controlled Combustion

4. Period of After Burning

Knocking in CI Engine

Knocking in SI and CI Engine

Normal Combustion

Under ideal conditions the common internal combustion engine burns the fuel/air mixture in the cylinder in an orderly and controlled fashion.

Abnormal Combustion

Factors affecting Delay period

Factors affecting Delay period

Factors affecting Delay period

Factors affecting Delay period

Factors affecting Delay period

Reducing Knocking in SI and CI engine

Combustion Chamber in CI engine

1. Direct Injection type 2. Indirect Injection type

1. Direct Injection Type.

• Shallow depth Chamber• Hemispherical Chamber• Cylindrical Chamber• Toroidal Chamber

Direct Injection Type

Shallow depth Chamber Hemispherical Chamber

Direct Injection Type

Cylindrical Chamber Toroidal Chamber

2. Indirect Injection Type.

Indirect Injection Type

1. Swirl Chamber

Indirect Injection Type

2. Precombustion Chamber

Indirect Injection Type

3. Air-Cell Combustion Chamber

Turbo charging

1. Exhaust Turbo charging of Single cylinder engine.

Turbo charging

2. Exhaust Turbo charging of a V type engine.