9 - Combustion in Spark-Ignition Engines

9.1 Essential Feature of Process
9.2 Thermodynamics Analysis of SI Engine Combustion

• 9.2.1 Burned and Unburned Mixture States
• 9.2.2 Analysis of Cylinder Pressure Data
• 9.2.3 Combustion Process Characterization

9.3 Flames Structure and Speed

• 9.3.1 Experimental Observations
• 9.3.2 Flame Structure
• 9.3.3 Laminar Burning Speeds
• 9.3.4 Flame Propagation Relations

9.4 Cyclic Variations in Combustion, Partial Burning, and Misfire

• 9.4.1 Observations and Definitions
• 9.4.2 Causes of Cycle-by-Cycle and Cylinder-to-Cylinder Variations
• 9.4.3 Partial Burning, Misfire, and Engine Stability

9.5 Spark Ignition

• 9.5.1 Ignition Fundamentals
• 9.5.2 Conventional Ignition Systems
• 9.5.3 Alternative Ignition Approaches

9.6 Abnormal Combustion : Knock and Surface Ignition

• 9.6.1 Description of Phenomena
• 9.6.2 Knock Fundamentals
• 9.6.3 Fuel Factors

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