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What enters the cylinder during the intake stroke?
Fuel-air mix
What compresses the fuel-air mix?
Piston
What causes the power stroke?
Spark plug ignition
What happens during the exhaust stroke?
Burned gases exit
How many strokes are in one full cycle?
4
What part converts piston movement into rotation?
Crankshaft
What controls valve timing?
Camshaft
What is valve overlap? (A). Both valves are closed (B.) Intake valve opens early (C.) Exhaust valve opens late ( D.) Both valves are open briefly
(D.) Both valves are open briefly
What is the role of the spark plug?
Ignite fuel-air mix
When does combustion happen?
Power stroke
What helps remove leftover gases?
Valve overlap
What is the temperature during combustion?
3000–4000°F
What is the pressure during combustion?
30,000 psi
What does the camshaft do?
Control valve timing
Why is compression important?
Increases power
What does a rich mixture contain?
More fuel
