Radiator is a heat transfer device that acts as a cooling and storage area for the liquid combination of water and antifreeze.

1. Sacred Automotive
Various Components Of Automobile
Engines

2. Objectives
 Identify the categories of internal combustion
engine systems in class notes.
 Identify the components of the primary or
compression systems.
 Describe the components of an engine’s
operating system.

3. Categories of internal combustion
engine systems
 Primary system
 Operating systems
 Accessory systems

4. Primary System
 Creates the engine
compression and converts
the energy of combustion to
mechanical energy.
 Also referred to as the
compression system.

5. Operating Systems
 Perform other engine functions.
 Engine will not operate without operating
systems.
 Also referred to as auxiliary systems.
 Examples: electrical system, cooling systems,
etc.

6. Accessory Systems
 Not necessary for engine operation.
 When they fail, the engine is still operable.
 Example: power steering system

7. Components of Primary System
 Piston
 piston rings
 Cylinder
 Head gaskets
 Cylinder head
 Valves
 Intake and exhaust
 Valve springs
 Spring retainers
 Valve guides
 Camshaft

8. Components of Operating
System
 Air intake system-
 functions to provide a source of clean air necessary
for the combustion of the air-fuel mixture.
 Air cleaner- filtering device located on the outside
of the engine.
 Carburetor- provides fuel and air to the engine in
correct proportions and volume.

9. Components of Operating
Systems
 Fuel System-
 Delivers clean and adequate amounts of fuel to the
cylinder.
 Fuel tank
 Fuel filter- acts as a cleaner for the fuel that passes
through it.
 Fuel pump- ensures that an adequate amount of
fuel under the correct pressure is distributed
throughout the rest of the system.
 Fuel injection systems- inject fuel into the
combustion chamber
 Mechanical fuel injection systems- use mechanical type
pumps
 Electronic fuel injection systems- use electrically

10. Components of Operating
Systems
 Exhaust system-
 Removes the exhaust gases and particles from the
combustion chamber.
 Manages engine noise and heat transfer.
 Exhaust manifold
 Exhaust pipe
 Muffler

11. Components of Operating
Systems
 Engine cooling system-
 Manages the heat produced by the combustion of
the air-fuel mixture.
 Allows the engine to reach its optimum operating
temperature and to maintain that temperature under
varying conditions.
 2 basic types:
 Liquid cooling system
 Air-cooled system

12. Engine Cooling Systems
 Liquid cooling system-
 Uses a liquid to transfer heat from engine
components to the surrounding air.
 Radiator- heat transfer device that acts as a
cooling and storage area for the liquid combination
of water and antifreeze.
 Water pump- mechanical device that forces the
coolant to flow through the system.
 Thermostat- flow control valve that regulates
temperature inside an engine by opening and
closing.
 Additional components of a liquid cooling system:
radiator cap, water jacket, fan, fan belt, temperature
gauge

13. Engine Cooling Systems
 Air-cooled system-
 transfers the heat of the engine components directly to
the surrounding air.
 Common on small gas engines.
 Fins- used to increase the surface area in contact with
the air so that engine heat can be transferred more
efficiently.
 Shroud- engine cover that directs cooling air across the
engine fins.
 Fan- force air through the engine cooling system.

14. Components of Operating
Systems
 Ignition system-
 Starts the combustion of air-fuel mixture.
 Compression ignition system-
 No unique parts; part of the compression system
 Spark ignition system-
 Uses a high voltage electrical spark to ignite the compressed
air and fuel mixture in the combustion chamber.
 2 types:
 Magneto-type ignition systems
 Battery-type ignition systems

15. Spark Ignition Systems
 Magneto- type ignition systems-
 use magnets and coils to generate electrical
pressure to arc the spark plug.
 Flywheel magnet creates a magnetic field which
cuts across the armature and coil assembly as the
flywheel rotates, inducing voltage into the primary
circuit.

16. Spark Ignition Systems
 Battery-type ignition system-
 Uses the energy from a battery and/or alternator to
create the ignition spark.

17. Components of Operating
Systems
 Lubrication system-
 Keeps internal engine parts coated with oil to:
 Reduce friction
 Enhance cooling
 Seal internal engine components
 Clean internal parts
 Basic components
 Oil filter
 Pressure regulator
 Oil pans
 Oil pump

18. Components of Operating
Systems
 Starting system-
 Used to turn the engine crankshaft until the engine
starts.
 Manual starting systems-
 Common on small gas engines
 Manually turning the crankshaft.
 Rope starter
 Electrical starting systems-
 Solenoid-type switch controls the correct amount of voltage
going to the starter.
 Flywheel

19. Thanks