INTERNAL COMBUSTION ENGINES
Group A

Classification of engines according to fuels, cycle of operation and number of strokes,
construction details, value arrangements, application of IC engines, review of air standard
cycles, deviation of actual cycles from fuel-air cycles, various influencing factors.
Review of fuels for IC engines with particular reference to velocity, ignition quality and
knock rating, variable compression ratio engines.
Air-fuel ratios and mixture requirements of SI engines, stoichiometric fuel air ratio, lean and rich mixture operation, optimum conditions, carburetors-principle, types and venturi, fuel orifice sizes, charge stratification and distribution.
Fuel-air requirement in CI engines. Methods of fuel oil distribution and injection. Types of
injector systems in SI and CI engines. Flame front and normal combustion. Detonation in SI
and knocking CI engines. Factors influencing detonation and knock. Comparative analysis.
Ignition systems in SI and CI engines.




Group B

 

Engine friction and lubrication: Effect of engine variables, total engine friction, requirem
of lubricants and lubricating systems.
Cooling systems: Gas temperature variation, heat transfer rates, piston and cylinder
temperature, heat rejected to coolant, air and water cooling systems and components.
Two-stroke engines: Special features, scavenging systems.
Supercharging: Objects, effects on engine performance, supercharging limits, methods of
supercharging with special .emphasis on turbochargers.
Engine testing and performance: Various performance parameters and their measurements.
Air pollution from engine exhaust, its measurement and control, principle constituents of
engine, emission methods of control, modification of conventional engines, dual fuel and
multifuel engines, stratified charged engines, sterlings engines, Wankel rotary combustion
engine.






 

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