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1. ENGINE
09ME93 Yasir Hashmi
QUEST Nawabshah

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

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

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.