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PARTS OF AN ENGINE
BASIC PARTS OF THE ENGINE
 Cylinder block
 Piston
 Piston rings
 Piston pin
 Connecting rod
 Crankshaft
 Cylinder head
 Intake valve
 Exhaust valve
 Camshaft
 Spark plug
2
BASIC COMPONENTS
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
Intake Valve:-
 opens at the proper time to let in air and fuel.
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
 Doorway that lets the gases in and out of the
engine.
6
Lower End Action
7
Valve Cover:-
 Protects the valves and the valve springs. Keeps dirt
out and lubricating oil in.
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
Cylinder Head:-
 a platform containing most of the parts of the
combustion chamber.
 Forms the top of the combustion chamber.
 Contains the valves, the passageways for the fuel mixture to
move in and out of the engine.
BASIC COMPONENTS
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
Coolant:-
 circulating water and antifreeze to keep the
temperature regulated.
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
 Engine Block- cast in one piece. The basis for most
of the parts of the engine.
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
 Oil Pan- where the oil is collected and recirculated.
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
 Oil Sump:- the collected oil primarily for lubricating
the crankshaft and rod bearing
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
Camshaft:-
 a round shaft with lobes, that rotates to open and close
the fuel and exhaust valves.
 Through the use of an eccentric the cam lobes push the
valves open.
 The valve springs close them.
22
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
 Exhaust Valve- open at the proper time to release the
exhaust
Lower End Action
25
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
 Spark Plug a device, inserted into the combustion
chamber for firing an electrical spark to ignite air-fuel
mixture
SPARK PLUG ( PETROL ENGINE )
 Electric match used to
begin the combustion
process of burning air
and gasoline to create
heat.
28
INJECTOR ( FOR DIESEL)
Fuel injection is a system for admitting fuel into an internal combustion
engine ( Diesel Engine )
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
 Piston- the part of the engine that moves up and
down in the cylinder converting the gasoline into
motion
Know Your Piston!
Piston Rings:-
 The rings seal the compression gases above the
piston keep the oil below the piston rings.
Piston Pins:-
 Also known as the
wrist pin, it connects
the piston to the
small end of the
connecting rod.
 It transfers the force
and allows the rod to
swing back and forth.
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
 Connecting Rod- links the piston to the crankshaft.
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
 Rod Bearing- used to reduce friction to the rod and
crankshaft
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
 Crankshaft- converts the up and down motion of the
piston into a turning, or rotating motion
 Along the the piston
pin and connecting
rod it converts the up
and down motion
(reciprocating) of the
engine to spinning
(rotary) motion.
41
RELATION BETWEEN PISTON, CONNECTING ROD & CRANK SHAFT
Intake Valve
Valve Cover
Intake Port
Head
Coolant
Engine Block
Oil Pan
Oil Sump
Crankshaft
Camshaft
Exhaust Valve
Spark Plug
Exhaust Port
Piston
Connecting Rod
Rod Bearings
Flywheel:-
 Carries the inertia when there is no
power stroke.
44
GASKET
 A gasket is a mechanical seal which fills the space
between two or more mating surfaces, generally to
prevent leakage from or into the joined objects while
under compression
WATER PUMP
 The water pump is a simple centrifugal pump driven
by a belt connected to the crankshaft of the engine.
The pump circulates fluid whenever the engine is
running.

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Main Engine Parts Explained in 40 Characters

  • 1. PARTS OF AN ENGINE
  • 2. BASIC PARTS OF THE ENGINE  Cylinder block  Piston  Piston rings  Piston pin  Connecting rod  Crankshaft  Cylinder head  Intake valve  Exhaust valve  Camshaft  Spark plug 2
  • 3. BASIC COMPONENTS Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 4. Intake Valve:-  opens at the proper time to let in air and fuel.
  • 5. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 6.  Doorway that lets the gases in and out of the engine. 6
  • 8. Valve Cover:-  Protects the valves and the valve springs. Keeps dirt out and lubricating oil in.
  • 9. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 10. Cylinder Head:-  a platform containing most of the parts of the combustion chamber.  Forms the top of the combustion chamber.  Contains the valves, the passageways for the fuel mixture to move in and out of the engine.
  • 11.
  • 12. BASIC COMPONENTS Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 13. Coolant:-  circulating water and antifreeze to keep the temperature regulated.
  • 14. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 15.  Engine Block- cast in one piece. The basis for most of the parts of the engine.
  • 16. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 17.  Oil Pan- where the oil is collected and recirculated.
  • 18. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 19.  Oil Sump:- the collected oil primarily for lubricating the crankshaft and rod bearing
  • 20. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 21. Camshaft:-  a round shaft with lobes, that rotates to open and close the fuel and exhaust valves.  Through the use of an eccentric the cam lobes push the valves open.  The valve springs close them.
  • 22. 22
  • 23. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 24.  Exhaust Valve- open at the proper time to release the exhaust
  • 26. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 27.  Spark Plug a device, inserted into the combustion chamber for firing an electrical spark to ignite air-fuel mixture SPARK PLUG ( PETROL ENGINE )
  • 28.  Electric match used to begin the combustion process of burning air and gasoline to create heat. 28
  • 29. INJECTOR ( FOR DIESEL) Fuel injection is a system for admitting fuel into an internal combustion engine ( Diesel Engine )
  • 30. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 31.  Piston- the part of the engine that moves up and down in the cylinder converting the gasoline into motion
  • 33. Piston Rings:-  The rings seal the compression gases above the piston keep the oil below the piston rings.
  • 34. Piston Pins:-  Also known as the wrist pin, it connects the piston to the small end of the connecting rod.  It transfers the force and allows the rod to swing back and forth.
  • 35. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 36.  Connecting Rod- links the piston to the crankshaft.
  • 37. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 38.  Rod Bearing- used to reduce friction to the rod and crankshaft
  • 39. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 40.  Crankshaft- converts the up and down motion of the piston into a turning, or rotating motion
  • 41.  Along the the piston pin and connecting rod it converts the up and down motion (reciprocating) of the engine to spinning (rotary) motion. 41
  • 42. RELATION BETWEEN PISTON, CONNECTING ROD & CRANK SHAFT
  • 43. Intake Valve Valve Cover Intake Port Head Coolant Engine Block Oil Pan Oil Sump Crankshaft Camshaft Exhaust Valve Spark Plug Exhaust Port Piston Connecting Rod Rod Bearings
  • 44. Flywheel:-  Carries the inertia when there is no power stroke. 44
  • 45. GASKET  A gasket is a mechanical seal which fills the space between two or more mating surfaces, generally to prevent leakage from or into the joined objects while under compression
  • 46. WATER PUMP  The water pump is a simple centrifugal pump driven by a belt connected to the crankshaft of the engine. The pump circulates fluid whenever the engine is running.