Internal Combustion Engine
An interactive visual guide explains the four-stroke cycle of a gasoline internal combustion engine, detailing the intake, compression, power, and exhaust strokes, along with key components like pistons, valves, spark plugs, and the crankshaft.
Background
- This is an interactive, highly visual deep-dive into how four-stroke gasoline engines work, created by Bartosz Ciechanowski, a Polish engineer known for his meticulously animated explainers on mechanical and physical systems.
- Ciechanowski’s previous pieces (on topics like gears, cameras, the Sun, and clocks) are famous in tech and engineering circles for using custom JavaScript to build explorable 3D models and cross-sections — this piece is the same style.
- The article walks through the entire Otto cycle (intake, compression, power, exhaust), the valvetrain, ignition system, crankshaft, and cooling — assuming no prior mechanical knowledge, but at a level of detail that rewards readers who already know the basics.
- It’s relevant because the internal combustion engine remains the dominant power source for transportation worldwide, and understanding its physics and engineering trade-offs is essential context for debates about EVs, emissions regulations, and fuel efficiency.