The document discusses the key components and workings of an internal combustion engine. It defines an internal combustion engine as one where combustion of fuel occurs within the engine's cylinder. It then lists and describes the main constructional parts of an internal combustion engine, including the cylinder, cylinder head, piston, connecting rod, crankshaft, camshaft, and flywheel. The cylinder contains the moving piston and is where combustion takes place. The cylinder head covers the cylinder and contains inlet and outlet valves and a spark plug or nozzle.

2. Roll No# 16TE55
LUTUF ULLAH

3. HEAT ENGINE
 The Engine in which heat is created by combustion of
fuel . And converts some amount of heat in to
mechanical work. Heat engine classified into two
main classes,
 Internal Combustion Engine
 External Combustion Engine

4. Internal Combustion Engine
 In this case combustion of fuel with oxygen of the air
occurs with in the cylinder of the engine.

5. I.C ENGINE
 Engine in which combustion takes place
inside the cylinder of an Engine is called I.C
Engine.
E.g : Air craft engine, Auto mobile engine.

6. CONSTRUCTIONAL PARTS OF I.C ENGINE.
1. Cylinder
2. Cylinder head
3. Piston
4. Connecting rod
5. Crank shaft
6. Cam shaft
7. Fly wheel

7. CYLINDER;
 It is the important part of the engine in which the
piston moves up and down in order to develope power.

8. CYLINDER HEAD;
 It is fitted one end of the cylinder and act as a cover to
close the cylinder.
It contains,
1. inlet and outlet valves.
2. spark plug or nozzle.

9. PISTON;
 It is considered as the heart of I.C Engine. Whose
main function is to transmit the force exerted by the
burning of charge to the connecting rod.

10. CONNECTING ROD
 It is the link between the piston and crankshaft,
whose main function is to transmit force from the
piston to the crank shaft.

11. CRANK SHAFT;
It is considered as the backbone of an I.C Engine.
Whose function is to convert reciprocating motion of
piston in to the rotary motion with the help of
connecting rod.

12. CAM SHAFT;
 The shaft which has cams for the opening and closing
of inlet and outlet valves.

13. FLY WHEEL;
 It is the big wheel mounted on the crankshaft whose
function is to maintain its speed at constant.
 The constant speed is done by storing excess energy
during power stroke upto returning of other power
stroke.