Engine Anatomy Explorer
Choose one of eight major engine groups. See how each contributes to cylinder sealing, timed breathing, heat management and crankshaft torque.
The Four-Stroke Cycle · 720°
Compare the four idealized strokes for one cylinder. Each stage represents approximately 180° of crankshaft rotation; real valve and ignition timing vary.
Displacement Geometry Lab
Adjust an illustrative bore, stroke and cylinder count. Swept volume uses geometric dimensions only; it does not calculate compression ratio, compression-test pressure, power or manufacturer specifications.
Illustrative calculation
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Quick challenge
If stroke and cylinder count stay fixed while the bore increases, what happens to geometric displacement?
These values and the challenge are educational only. Consult current engine-specific service information for real dimensions and measurement procedures.
Engine Design & Diagnostic Decisions
Six fictional scenarios connect engine terminology with responsible service decisions. A correct answer does not diagnose or repair a real engine.
06.1 · Knowledge Check
Answer all ten questions to record an online concept score. It does not establish mechanical service or measurement competence.
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Next: 06.2 · Engine Block, Pistons, Rods & Crankshaft — Interactive Course.