I C engine
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This document discusses internal combustion engines. It begins by defining an engine as a mechanical device that converts one form of energy into another, and an internal combustion engine as one where combustion occurs inside the engine cylinder. It then classifies internal combustion engines based on their cycle of operation, thermodynamic cycle, ignition method, number of cylinders, cooling system, fuel used, and speed. The document proceeds to describe the components and four stroke cycle of a four-stroke engine, showing intake, compression, power, and exhaust strokes. It also briefly discusses two-stroke engines and diesel engines before comparing two-stroke and four-stroke engines.
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The document discusses the four stroke petrol engine. It begins by introducing the four main components: the intake stroke where air-fuel mixture enters the combustion chamber, the compression stroke where the piston compresses the mixture, the power stroke where combustion occurs and the piston is pushed down, and the exhaust stroke where burnt gases are pushed out. It then explains each stroke in more detail and analyzes the thermodynamic process. Advantages include less fuel consumption and higher efficiency, while disadvantages are more complex design and higher costs. Applications include use in cars, motorcycles, boats and other small engines.
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I C engine
- 2. I. C. ENGINESUBMITED TO :- ER. HARSH WARDHAN MR. MUKESH BISHNOI
- 3. I.C. ENGINE ENGINE Mechanical device which converts one form of energy into another form I.C. ENGINE Engine in which combustion take place inside engine cylinder is called IC engine. E.g.-Aircraft engine, Automobile Engines
- 4. I.C. ENGINE
- 5. CLASSIFICATION OF I.C. ENGINE 1. CYCLE OF OPERATION Two stroke engine Four stroke engine 2. THERMODYNAMIC CYCLE Otto cycle Diesel cycle Dual cycle 3. METHOD OF IGNITION S.I. ENGINE C,I. ENGINE 4. NO. OF CYLINDERS Single Multi 5. COOLING SYSTEM Air cooled Water cooled Oil cooled
- 6. CLASSIFICATION OF I.C. ENGINE FUEL USED Petrol Diesel Gas SPEED High speed Lows peed Medium speed
- 7. Components of Four-Stroke Engines Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings Back Next Diagram
- 8. Four Stroke Cycle 8 Intake Compression Power Exhaust
- 9. Intake Stroke Intake valve opens. Piston moves down, ½ turn of crankshaft. A vacuum is created in the cylinder. Atmospheric pressure pushes the air/fuel mixture into the cylinder. 9
- 10. Compression Stroke Valves close. Piston moves up, ½ turn of crankshaft. Air/fuel mixture is compressed. Fuel starts to vaporize and heat begins to build. 10
- 11. Power Stroke Valves remain closed. Spark plug fires igniting fuel mixture. Piston moves down, ½ turn of crankshaft. Heat is converted to mechanical energy. 11
- 12. Exhaust Stroke Exhaust valve opens. Piston move up, crankshaft makes ½ turn. Exhaust gases are pushed out polluting the atmosphere. 12
- 13. Four Stroke Cycle Animation 13
- 16. TWO STROKES V/S FOUR STROKES Cycle - 1 rev & 2 strokes 1 power stroke per Rev. Ports Simple ,light weight , low cost More power for same size engine Piston shape –crown Less efficiency E.g, mopeds, scooters Cycle-2rev & 4strokes 1 Power stroke per 2 Rev valves Complicated, heavy , costly Less power Flat piston More efficiency TWO STROKES FOUR STROKES
- 17. THANK YOU