The document provides an overview of car engine components, categorizing them into mechanical and electrical parts, along with their functions. Key mechanical components include tappet cover, engine head, and crankshaft, while electrical components include the alternator, spark plug, and ignition coil. It emphasizes the importance of regular maintenance and checking components like engine oil and battery for optimal performance.

1. What You Should Know About Your
Car Engine

2. Lets Start!

3. Car Engine

4. Engine
 Car engine is not a single unit but built
up from different size components with
specific function each.

5.  Parts can be categorized into Mechanical &
Electrical parts.

6. Engine Spares

8. Mechanical Component
1- Tappet Cover
2- Engine Head
3- Engine Block
4- Engine Oil Sump
5- Cam Shaft
6- Crank Shaft
7- Piston
8- Fuel Pump
9- Valves
10- Rocker arm
11- Crank case
12- Connecting Rod
13- Engine Oil
14- Filters

9. Electrical Component
1- Alternator
2- self starter
3- Spark Plug
4- Electric Fuel Injector
5- Ignition Coil
6- Battery

10. Use Of Spares

11. Mechanical Component

12. Tappet Cover

13. Tappet cover is located on cylinder
head
Tappet cover is used to keep engine oil
in & dirt oil out. This part is seen in
internal combustion engines.
Use Of Tappet
Cover

14. Engine Head

15. Engine head is a part which is
fixed on the top of cylinder block,
houses & valves.
Engine head is bolted to cylinder
block with head gasket and cam
shaft also.
Inlet & exhaust ports are also
machined in head.
Use Of
Engine Head

16. Engine Block

17. Use Of Engine
Block
Part of the engine where cylinder located is
called engine block or cylinder block.
Engine cylinder is a part where fuel is admitted
in a reciprocating motion of piston obtained by
burning it.
Engine cylinder characterized in bore & stroke,
bore represents inner diameter & stroke is the
distance travel by piston.

18. Engine Oil Sump

19. Use Of Engine Oil
Sump
Engine oil is stored in an
oil chamber called engine
oil sump.
Engine is oil lifted by oil
pump from sump through a
wire mesh strainer which
retains debris & dirt.

20. Cam Shaft

21. Use Of
Cam Shaft
Cam shaft is a shaft in which cams are fitted
or machined.
Function of cam shaft is to operate valves
directly by sitting over or indirectly through a
mechanism.
Opening or closing of valves is governed by
camshaft which is coupled to crank shaft
either directly through a reduction gear or
indirectly through a pulley and timing belt.

22. Crank Shaft

23. Use Of
Crank
Shaft
Crank shaft has
projection bent
& offset from
the shaft axis of
engine
Crankshaft is
placed below
the cylinder
block in a
casing
Crank shaft
converts the
sliding motion
obtained from the
piston into rotary
motion

24. Piston & Piston Ring

25. Piston is a cylindrical
part which moves up
& down in cylinder.
Use Of Piston
Piston diameter is
slightly less than bore
of cylinder
& Rings
Piston rings are fitted in piston &
in direct contact with cylinder liner
to prevent piston wear

26. Fuel Pump

27. Use Of Fuel Pump
Fuel pump sprays pressurized fuel in to the
cylinder & fuel gets ignited when it comes
in contact with the air.
The fuel pump consists of a spring loaded
piston valve in a cylinder. When fuel from the
fuel filter is introduced in the fuel pump, the
spring loaded piston applies pressure

28. Valves

29. Use Of Valves
Valves are used in IC
engines called poppet
valves.
Valves function is to take
fresh charge & exhaust
waste gases.

30. Rocker Arm

31. Use Of Rocker Arm
Rocker arm rocks or
oscillates a fixed pivot
rod in cylinder head.
Rocker arm transmits
rotary motion of cam or
crank shaft through a
tappet.

32. Crank Case

33. The crankcase encloses
crank shaft, connecting rod
& protect from dust , dirt
Use Of crank Case
materials.
The metallic housing in
which crank shaft is placed
called crank case.

34. Connecting Rod

35. Use Of
Connecting Rod
Connecting rod
connects piston to crank
shaft
It converts the linear
motion of the piston into
rotary motion of the
crank

36. Engine Oil

37. Use of
Engine Oil
Engine oil lubricates engine
spares and helps in running
smoothly.
Always change engine oil as
per service instruction or
after every 3000 miles.

38. Filters

39. Use Of Filters
Fuel filter restricts the flow of
fuel & it also collects debris
that would pass through
carburetor.
Always change filters as per
service manual of car,
otherwise calculate the miles
you run.

40. Electrical Components

41. Alternator

42. Use Of
Alternator
It is an AC generator which
charges car’s battery and
power the electrical system
when car running.
Alternator is a device which
converts mechanical energy
to electrical energy.

43. Self Starter

44. U
S
E
Self starter is used for engine start. To
accomplish this, the starter motor is
connected to a key operated switch and a
starting battery.
When ignition switch is on, the circuit is
completed and it pushes out pinion of motor
shaft which goes into mesh with flywheel
gear.

45. Spark Plug

46. Use of
Spark Plug
Spark plug ignites fuel
in combustion chamber
at the end of
compression stroke.
Spark plug fitted in
cylinder head on the
underside of
combustion chamber
threads on plug body.

47. Electric Fuel Injector

48. Use of Fuel
Injector
It controls injection process
so that required amount of
fuel is injected into the
cylinder before firing.
It helps in proper fuel
distribution, improve engine
performance and lesser
maintenance.

49. Ignition Coil

50. Use Of Ignition Coil
 Ignition coil generates voltage to be supplied
to spark plug.
 It has two coils, primary & secondary;
primary is connected to battery & secondary to
the capacitor.

51. Battery

52. Battery Use
Battery role is important
for a car, it provides
electricity for all type of
function.
Always check battery
condition & acid level
for better performance.

53.  Check the car engine regularly & do preventing
maintenance in proper time for a long life.

55. Thank You
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