Engine

1
Combustion of Fuel/Air Increases Pressure Ports
are Closed
2
Piston Starts Downward Crankcase Pressure
Rises Fuel/Air Forced Upward
3
Piston Continues Down Fuel/Air Continues
Upward Ports Start to Open
4
Cylinder Press. Starts to Drop Exhaust Press.
Pushes Fuel/Air out of Expansion Chamber
5
Fuel/Air Enters Cylinder from Exhaust
6
Fuel/Air from Exhaust Starts to Burn Fuel/Air
Enters Cylinder from Crankcase
7
Fuel/Air from Exhaust Burns Resulting in
Additional Expansion
8
Intake Fuel/Air Begins to Push Exhaust Out
9
Fuel/Air Pushes Exhaust Out
10
Fuel/Air Pushes Exhaust Out
11
Fuel/Air Pushes Exhaust Out
12
Fuel/Air Pushes Exhaust Out
13
Piston Starts Upward Fuel/Air is Pulled in from
Carburetor Piston Pushes Exhaust Out
14
Fuel/Air Continues to Enter Crankcase Some
Fuel/Air Starts to Escape Cylinder
15
Fuel/Air Continues to Enter Crankcase Some
Fuel/Air Escapes into Exhaust
16
Fuel/Air Continues to Enter Crankcase
17
Fuel/Air Continues to Enter Crankcase
18
Fuel/Air Continues to Enter Crankcase
19
Fuel/Air Continues to Enter Crankcase
20
Ports Begin to Close
21
Combustion Chamber Press. Increases
22
Combustion Chamber Press. Increases Ports are
Closed Electronic Spark is Initiated Slightly
Before the Piston Reaches Top
23
Flame, due to Ignition, Propagates, Increasing
Pressure in Combustion Chamber