PETROL ENGINE PISTON

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MAJOR PARTS OF AN IC ENGINE

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ENGINE COMPONENTS 1. CYLINDER BLOCK      The cylinder block is the main body of the engine. Cylinder head is mounted on the cylinder block. It houses iniet and exhaus valves. Crank case is attached to the bottom of the cylinder block. Crank case supports the crank shaft. Oil pan is attached to the bottom of the crank case. Cylinder block contains large cylindrical holes called cylinder bore. The cylinders are accurately finished to accommodate pistons. The space above the piston inside the cylinder at TDC called the combustion chamber. Combustion of fuel inside this space, high pressure and temperature will be developed inside the cylinder. Therefore, it should be made of material which can resist high pressure and temperature (2800°C). In water jackets has around the cylinders for the circulation cooling water to absorb the temperature while running of an engine. 2. CYLINDER HEAD Cylinder head is a separate casting placed on top of the cylinder block by studs and nuts. It houses the i
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INTRODUCTION TO ENGINE ( for NCVT)

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Engine : It acts as the power unit. The internal combustion engine is the most commonly used in automobiles. It is of two types ; (i) Spark ignition (ii) Compression ignition.         Both engines are called heat engines. A steam engine is an external combustion engine because the fuel is burned outside the engine. The principle of working of an external combustion engine is shown in the figure below. COMPARISON BETWEEN INTERNAL AND EXTERNAL COMBUSTION ENGINES      The internal combustion engine is an engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber. In an internal combustion engine the expansion of the high temperature and pressure gases, which are produced by the combustion, directly applies force to a movable component of the engine, such as the pistons and by moving it over a distance, generate useful mechanical energy.          The internal combustion engine is quite different from external combustion engines, such
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HEAD LIGHT CIRCUIT WITH 6 LEG RELAY

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  AIM : Head light circuit TOOLS & MATERIALS REQUIRED : 1. Wire striper 2. Combination plier 3. Screw driver (+,-) 4. Wire(required) 5. Head light switch 6. Dipper switch 7. Relay - 6 leg 8. Insulation tape 9. Battery 12v 10. Head lamp 12v Diagram PROCEDURE 1. ബാറ്ററിയുടെ +ve ടെർമിനലിൽ നിന്നും fuse വഴി relay യിലേക്കും head light സ്വിച്ചിലേക്കും red wire ഉപയോഗിച്ച് connect ചെയ്യുക. 2. Head light സ്വിച്ചിൽ നിന്നും dipper സ്വിച്ചിന്റെ center point ലേക്ക് red wire ഉപയോഗിച്ച് connect ചെയ്യുക. 3. Relay യുടെ dim, bright connection യഥാക്രമം dipper switch ന്റെ Low, High ബിം പോയിന്റിലേക് connect ചെയ്യുക. 4. അതിനുശേഷം Head light ൽ നിന്നുള്ള loop ചെയ്ത High beam Low beam വയറുകൾ relay യുടെ high, low beam വയറിലേക് ബന്ധിപ്പിക്കുക. 5. Relay യിൽ നിന്നുള്ള -ve ഉം, head light ൽ നിന്നുള്ള -ve ഉം യോചിപ്പിച്ചു battery യുടെ -ve ടെർമിനലിലേക് connect ചെയ്യുക. RESULT HEAD LIGHT CIRCUIT വിജയകരമായി പൂർത്തീകരിച്ചു.
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