Explanation should include
- intake
- compression
- power
- preignition and its effects
- normal combustion process, detonation and its effects
- exhaust, as well as the events taking place during each of these strokes (cycles).
Process/Skill Questions:
- How does understanding four-stroke theory benefit the small engine technician?
- When the intake valve is open and the piston is traveling down, what stroke is occurring?
- When the exhaust valve is open and the piston is traveling up, what stroke is occurring?
- What is detonation?
- What is preignition?
- What does TDC stand for?
- What does BDC stand for?