Internal Combustion Engine

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 particul ar reference to velocity, ignition quality and
knock rating, variable compression ratio engines.
Air-fuel ratios and mixture requirements of SI engines, stoichiome tric fuel air ratio, lean and
rich mixture operation, optimum conditions, carburetors-principle, type s 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. Flam e front and normal combustion. Detonation in SI
and knocking CI engines. Fact ors 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, requirements
of lubricants and lubricating systems.
Cooling systems: Gas temperature variation, heat transfer rates, piston and cylinder
temperature, heat rejected to coolant, ai r 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, modifica tion of conventional engines, dual fuel and
multifuel engines, stratified charged engines, sterlings engines, Wankel rotary combustion
engine.

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