A presentation of Ignition System Components

2. ONIINTGI EMTSSY

4. FUNCTION OF IGNITION
SYSTEM COMPONENTS
REYMART B. TABELISMA
TEACHER I- AUTOMOTIVE TECHNOLOGY

5. OBJECTIVES
•define Ignition system
•discuss the types, function, and parts of Ignition
System
•appreciate and value the significance of Ignition
System.

6. TECHNICAL TERMS
Circuit- a complete path of an electric current, including
the current source.
Winding- wire wound or coiled about an object such as
an iron core or armature, that produces a magnetic field
when current flows through it.
Transistor- a solid state electronic device that can be
use as an electric switch.

7. TECHNICAL TERMS
Volt- a unit of electrical pressure or force that will move
a current of 1 ampere through a resistance of ohm 1.
Voltage- a force which causes electrons to flow in a
conductor the differences in electrical pressure between
two parts in a circuit.

8. IGNITION SYSTEM
It is a system that furnishes high voltage sparks to the
engine cylinders to fire the compressed air-fuel mixture in the
combustion chamber.
the purpose of this system is to ignite the compressed
air-fuel mixture.

9. FUNCTION OF IGNITION SYSTEM
COMPONENTS
The ignition system feeds high voltage surge to the spark plugs
at proper time. The three major functions are:
1. It must supply an electric spark with sufficient heat in order to ignite
the air fuel mixture in the combustion chamber of the engine.
2. It must maintain the spark long enough to permit the combustion of
all fuel charges in the cylinder of the engine.
3. It must draw the spark to each cylinder combustion can begin at
specific time during the stroke of compression for every cylinder
engine.

10. TWO GENERAL TYPES OF IGNITION SYSTEM
 Contact point
is an electric system, a set of stationary and movable
parts which open and close to make or break the
electric current.

11.  Electronic ignition system
it uses transistor and other semiconductor devices as
an electric switch to turn the primary circuit or current
and OFF.

12. COMPONENTS
OF IGNITION
SYSTEM

13. COMPONENTS OF IGNITION SYSTEM
Battery- a device for storing energy in chemical form that
can be release as electricity. It serves as a source of
electric current in an automobile.

14. Ignition Switch- it open and
close the ignition coil
primary circuit. IT may also
used to open and close
other electric circuit.

15. •Ignition Resistor- a
resistor connected
into the ignition
primary circuit to
reduce battery
voltage to the coil
during engine
operation.

16. Ignition Coil- the
ignition system
component that set
a transformer to step
up(increase) the
battery voltage into
many thousands of
volts.

18. Distributor- a device that
distributes an electric
current to the spark plug.
The rotary switch that
directs high voltage surges
to the engine cylinders in
the proper sequences.

19. Contact Point- it refers to the
point in the distributor that
opens & closes the primary
circuit to build-up & collapse
the magnet line of force.

20. Condenser- it is connected
across the contact point to
prevent arcing and burning.
also provides the storage of
electricity when breaker point
is open

21. Rotor- it is the rotating
parts of the distributor
assembly that distributes
high voltage from coil
center cable to different
spark plug.

22. Distributor Cap- top cover
of distributor assembly
that prevents dirt or any
particles from entering
delicate parts.

23. High Tension- it a
secondary wire that
include the coil wire and
the spark plug wires.

24. Spark Plug- is the device
that burn air-fuel mixture,
which includes a pair of
electrodes and an
insulator, that provides a
spark gap in the cylinders.

25. THE IGNITION SYSTEM ARE TWO
INTERCONNECTED ELECTRICAL CIRCUITS.
Primary ( low voltage )
• Battery
• Ignition Switch
• Ballast Resistor or resistance wire
• Ignition coil primary winding
• Condenser
• Contact Point
• Ground
Secondary (high voltage circuits)
• Ignition coil (Secondary winding)
• Distributor cap
• Rotor
• Ignition cable or high tension wire
• Spark plug

28. WHAT YOU HAVE LEARNED?
Identify the following pictures. Write
your answer in activity/work sheet.

34. ASSIGNMENT
•Functions of Ignition Coil
•Parts of Ignition Coil
•Procedure in Checking Ignition Coil Resistance