విద్యా దదాతి వినయం

UNIT-2 I. C. ENGINES : Classification - Working principles, Valve and Port Timing Diagrams, - Engine systems – Fuel, Carburettor, Fuel Injection System, Ignition, Cooling and Lubrication, principle of wankel engine, principles of supercharging and turbo charging. I.C Engines Classification : According to combustion:Internal combustion (I.C) and External Combustion (EC) According to Type of fuel used: Petrol, diesel , gas / Alternative Fuels According to Number of strokes –Two stroke , four stroke  According to Type of ignition such as  Spark Ignition (SI), Compression Ignition (CI) According to Number of Cylinders – From 1 to up to 18 cylinders (in a car) According to Arrangement of cylinders which are Inline, V, W, Horizontal, Radial According to Motion of Pistons which are Reciprocation, Rotary According to Size / Capacity According to Bore-to-Stroke Ratio According to Engine cooling methods such as Air-cooled, Liquid-c...

UNIT-1 Actual Cycles and their Analysis : Introduction, Comparison of Air Standard and Actual Cycles, Time Loss  Factor, Heat Loss Factor, Exhaust Blow down-Loss due to Gas exchange process, Volumetric Efficiency. Loss  due to Rubbing Friction, Actual and Fuel-Air Cycles of CI Engines. Introduction :     The actual cycles for IC engines differ from the Fuel-air cycles and air standard cycles in many respects. The actual cycle efficiency is much lower than the air-standard cycle efficiency due to various losses . The major losses are followed as Variation of specific heat with temperature Dissociation of the combustion products Progressive combustion Incomplete combustion of fuel Heat transfer into the walls of the combustion chamber Blow down at the end of the exhaust process Gas exchange process Comparison of Air Standard and Actual Cycles :   The Actual cycle in internal combustion engine is different when compared to Air ...