Spark Plug reciprocating screw

					Engine Types and Spark Plugs
         Fairport High School
          Consumer Auto
   Types of Internal Engines
Diesel Engines
   Types of Internal Engines
Gas Turbine Engines
           Jets
           Helicopters
           Tanks
           Power Plants
   Types of Internal Engines
Rotary Engines




   The rotor and housing of a rotary engine from a
   Mazda RX-7: These parts replace the pistons,
   cylinders, valves, connecting rods and camshafts
   found in piston engines.
                Types of Engines
Two-Stroke Engines
Lawn and garden equipment
Dirt bikes       Mopeds
Jet skis
Outboard motors
Radio-controlled
model planes
    Types of Internal Engines
Reciprocating Engine
2 stroke - no valves, reeds used instead
  more power for same cc. mix oil and fuel
  for lubrication, more pollution than 4
  stroke

4 stroke - at least two valve per cylinder,
  separate fuel and oil for lubrication, less
  pollution than 2 stroke

Rotary - no piston, uses a rotor instead, not
 reciprocating better fuel economy the
 faster it spins, cannot overrev
Intake
Stroke




Piston movement = Starts at TDC and moves downward
Valve position = Intake valve opens and Closes
Events = Air/Fuel ratio gets sucked into combustion chamber
Crankshaft revolution = 1/2 turn
Compression
Stroke




Piston movement = Starts at BDC and moves Upward
Valve position = Both valves closed
Events = Air/Fuel ratio gets compressed
Crankshaft revolution = 1/2 turn
Combustion
(Power) Stroke




Piston movement = Starts at TDC and moves downward
Valve position = Both valves closed
Events = Air/Fuel ratio is burned forcing piston downward
Crankshaft revolution = 1/2 turn
Exhaust Stroke




Piston movement = Starts at BDC and moves Upward
Valve position = Exhaust valve is open
Events = Exhaust gases get pushed out of the cylinder
Crankshaft revolution = 1/2 turn
          Online Animations
• http://www.animatedengines.com/otto.sht
  ml

• http://weblogs.asp.net/rajbk/pages/silverlig
  ht-four-stroke-engine-demo-page.aspx
     Spark Plug Parts
1.    Stud / Terminal
2.    Cement
3.    Ceramic Insulator
4.    Center Electrode
5.    Silliment Seals
6.    Metal Shell
7.    Inside Gasket
 Spark Plug Parts
8.   Reach
9.   Gap (0.20 – 0.60)
10. Thread Diameter
11. Ground Electrode
12. Seat (Flat / Chamfer)
13. Hex (5/8 or 13/16)
14. Terminal Cap
        Spark Plugs Formats




Short & Long Reach Plugs
       Spark Plug Information
• TDC – Top Dead Center
• Spark plug gap is measured between the
  center and ground electrode
• Color of a strong spark is BLUE
• A plug that is black, dry and fluffy is carbon
  fouled.
• How do find number one spark plug location?
   Mitchell On-Demand, Chilton’s, or Car
  Care Guides
      Spark Plug Lab Procedure
1.   Obtain a printout of the spark plug configuration
     and firing order **
2.   Air hose the area around spark plug to remove
3.   Remove boot of the spark plug
4.   Remove spark plug (5/8” or 13/16” deep socket) **
5.   Check spark plug Condition **
6.   Clean spark plug **
7.   Gap spark plug **
8.   Screw in spark plug by hand – reinstall the boot –
     start vehicle
    Firing Order &
Cylinder Configuration
 Spark
  Plug
Condition
 Chart
             Spark Plug Tester Parts

                                                     High
  Air                                               Tension
                                                     Wire
 Blast

                                                     Spark
 Spark                                                Plug
  Plug                                               Tester
Cleaner




          Pressure Dial   Spark Window   Tester Start Button
                                                      Testing
                                                         a
                                                       Spark
                                                        Plug
1. Attach air the hose to the machine
2. Plug in the machine
3. Screw in your spark plug into the right threaded hole
4. Screw in another spark plug into the left threaded hole
5. Attach the high tensions wire to your spark plug
6. Push the tester button and look for a blue spark in the mirror

				
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