Components of IC engines

This is a second slide in the IC engine series. Here you will learn about different components of IC engines. All the slides have beautiful graphics for better understanding.

1. Components of IC Engine

2. Cylinder block Cylinder Head Piston Cylinder Piston Rings Gudgeon Pin Connecting Rod Crankshaft Cam Shaft Cams Inlet & Exhaust valve Fuel Injector Spark Plug Crankcase Flywheel Components of IC Engine

3. The cylinder block is the main supporting structure for the various components. The cylinder of multi cylinder engine are cast in single unit called as Cylinder Block Material : Cast Iron, Aluminum alloy CI for diesel engines, that produce stronger explosion. Al for gasoline engine that produces soft explosion. Cylinder Block

4. Cylinder Head The top end of the cylinder is covered by cylinder head over which inlet and exhaust valve, spark plug or injectors are mounted

5. Piston It is cylindrical component fitted into the cylinder forming the moving boundary of combustion system. Transmit the force exerted by the burning of charge to the connecting rod It fits perfectly into the cylinder providing a gas-tight space with the piston ring and lubricant . Material : aluminium alloy Light Weight Thermal Conductivity Good tensile strength

6. Cylinder It is the main part of the engine in which the piston reciprocate to and fro. It also acts in transferring the heat from: combustion chamber to water jacket in liquid cooled engine. Combustion chamber to fins in air cooled engine. Material : Cast Iron Good wear Resistance Good Damping behaviour High Thermal conductivity inexpensive

7. Piston Rings Piston rings, fitted into the slots around the piston, provides tight seal between the piston and cylinder wall thus preventing the leakage of combustion gases. There are two types of rings: Compression ring is upper ring of the piston which provides air tight seal to prevent leakage of the burnt gases into the lower portion. Oil ring is lower ring which provides effective seal to prevent leakage of the oil into the engine cylinder. Material : Cast Iron, steel alloys(coated or heat treated) High thermal conductivity Wear resistance

8. Connecting Rod It converts reciprocating motion of the piston into circular motion of the crankshaft , in the working stroke. The smaller end of the connecting rod is connected with the piston by gudgeon pin and bigger end of the connecting rod is connected with the crank with crank pin. Material : Steel alloys(drop forged), Titanium, Aluminum Lightweight, flexible (Al) High performance(Ti)

9. Gudgeon Pin It forms the link between the small end of connecting rod and piston

10. Crankshaft It converts the reciprocating motion of the piston into the useful rotary motion of output shaft with the help of connecting rod. In the crankshaft of single cylinder engine there are a pair of crank arms and a balance weights. The balance weights are provided for static and dynamic balancing of the rotatory system. The crankshaft is enclose in the crankcase Material: Medium carbon steel alloy(0.25-0.45%C) -Foging High fatigue strength Hardness

11. Cam Shaft The cam shaft and its associate parts control the opening and closing of two valves. The associate parts are pushrod, rocker arms, valve spring and tappets . The shaft also provide the drive to the ignition system. The camshaft is driven by the crankshaft through timing chain or timing gears. Material : chilled cast iron(1% Cr), Billet Steel. high volume production, have good wear resistance. high quality camshaft or low volume production

12. Cams These are made as integral parts of the camshaft and are designed in such a way to open the valves at the correct timings and to keep them open for necessary duration Cams

13. Inlet and exhaust valves Valves are commonly mushroom shape poppet type They are provided on the cylinder head for regulating the charge coming into the cylinder(inlet valve) and for discharging the products of combustion (exhaust valve) from the cylinder. Material : Stainless steel, Titanium, Inconel, high temperature,oxidation ,corrosion resistant

14. Spark Plug It is a component to initiate the combustion process in spark ignition(SI) engines and is usually located on the cylinder head.

15. Fuel Injector It is a component to initiate the combustion process in compression ignition(CI) engines and is usually located on the cylinder head.

16. CrankCase It is the bottom part of the Engine block It hose the crankshaft of the IC Engine and also serve as the sump for the lubricating oil.

17. Flywheel It is big wheel mounted on the crankshaft, whose function is to maintain its speed constant. It is done by storing excess energy during the power stroke, which is returned during other stroke. Material : Cast iron, Steel, (Dense Material)

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