2. ENGINE
•An engine is a machine which designed to convert energy into
useful mechanical energy
•Engines burn a fuel to create heat which is then used to create
motion
3. MAIN PARTS OF AN ENGINE
Piston
Piston cylinder
Inlet and outlet valves
Water pump
Oil pump
Oil chamber
Clutch plate
Crank shaft
Cam shaft
Gears
4. PISTON
It is the moving component that is contained by the
cylinder
Its purpose is to transfer force from expanding gas
in the cylinder to the crank shaft with a connecting
rod
5.
6. PISTON CYLINDER
It is a cylinder in which combustion takes place due
to compression of fuel and ignition. Piston
reciprocates in this cylinder
7. INLET AND OUTLET VALVES
One of the most necessary part of the engine
These valves open and close according to the
timing of combustion
Inlet valves opens to take the fuel into the cylinder
and closes during combustion
8. CRANK SHAFT
It converts reciprocating motion of piston into
rotation
Crank shaft consists of crank throws, crank pins,
additional bearing surfaces.
9. CAM SHAFT
Cam shaft is shaft which is fastened in internal
combustion engines with pistons
It is used to operate valves
10. DURATION OF A CAM SHAFT
It is the number of crank shaft rotation
Greater duration results in more horse power
11. CLUTCH PLATE
A mechanical device which provides transmission
of power from one component to another
Clutches are used whenever the ability to limit the
transmission of power or motion needs to be
controlled either in amount or overtime
12.
13. OIL PUMP
Oil pump in the engine is a gear type driven by the
crank shaft or a rotor type
Oiling system is used to properly lubricate an
engine when it is running
14. OIL PRESSURE
Oil pressure generated in most engines is about 10
PSI per every 1000 revolutions per minute (RPM)
peaking around 55-56 PSI
Local pressure at ( crank shaft journal and bearing )
is far higher than 50,60 PSI
15. WATER PUMP
It is a simple centrifugal pump driven by a belt
connected to a crank shaft of the engine
It circulates the fluid whenever the engine is running
16. GEARS
Some sort of gears are used in engine such as
Spur gear
it consist of a cylinder or disk with the
teeth projecting radially and although they are not
straight sided in the form, the edge of each tooth is
straight and aligned parallel to the axis of rotation.
17. Helical gears
The leading edges of the teeth are not
parallel to the axis of rotation , but are set at an
angle. Since the gear is curved , this angling
causes the tooth causes the tooth shape to be a
segment of a helix
18. Bevel gears
It is a right circular cone with most of
its tip cut off. The angle between can be anything
except zero or 180 degrees. Bevel gears with
equal numbers of teeth and shaft axes at 90
degrees are called miter gears.