IC Engines
Definition: IC Engines studies internal combustion engines, their cycles, performance, fuels, emissions, and advancements in automotive power systems.
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2022
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2025
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Detailed Syllabus
Unit 1: Introduction
- Classification of Internal Combustion Engine
- Parts of I.C. Engine and their materials
- Air standard Cycles in Four stroke and Two-stroke IC engines and their comparative study
- Brayton cycle
- parameters related to testing of IC engines
- determination of volumetric efficiency and factors affecting volumetric efficiency
- Adiabatic flame temperature
- Combustion efficiency
- Valve Timing Diagram
- Low Heat Rejection Engines
- Homogeneous charge compression Ignition
Unit 2: Combustion and Ignition System in SI Engines
Unit 3: Fuel Injection and Combustion in CI engines
- Air injection systems
- Airless/solid injection systems
- Common rail
- individual pump
- distributor and unit systems
- Injection pumps
- Fuel injector
- Types of nozzle
- Electronically controlled unit fuel injection system
- Stages of combustion in CI engines
- air fuel ratio
- cold starting of CI engine and cold starting aids
- delay period or ignition lag
- variables effecting delay period
- diesel knock, Factors affecting combustion and knocking
- methods of controlling diesel knock
- Types of CI engine combustion chamber
- Need for supercharging, Effect of supercharging
- types of supercharger, methods of supercharging
- thermodynamic analysis of supercharged engine cycle
- limitations of supercharging, turbocharging
Unit 4: Lubrication system and cooling system
- Types of lubricants and their properties
- SAE rating of lubricants
- Types of lubrication systems – wet sump and dry sump
- crankcase ventilation
- Necessity of engine cooling
- disadvantages of overcooling
- Cooling systems and their comparison: Air cooling, Liquid cooling
Unit 5: Alternative Fuels
- Alcohol - Hydrogen - Natural Gas and Liquefied Petroleum Gas
- Biodiesel- Biogas - Producer Gas
- Properties - Suitability
- Engine Modifications
- Merits and Demerits as fuels, comparison of their properties with Diesel and petrol
- method of manufacturing
Unit 6: Emissions and Control
- Air pollution due to IC engines
- Constituents of exhaust emission at its harmful effect on environment and human health
- Formation of NOx, HC, CO and particulate emissions
- Methods of controlling emissions
- Catalytic convertors
- particulate traps
- Exhaust Gas Recirculation
- EURO and BHARAT norms