Mechanical engineering relies on mechanisms — gears, cams, and linkages — to transmit and transform motion in machines from clocks to industrial robots. This simulator covers gear trains for torque and speed conversion, and four-bar linkages for converting rotary motion into complex coupler-curve paths. Changing tooth counts or link lengths immediately updates the kinematic output.
gear ratio · torque · four-bar linkage · kinematic analysis · mechanical advantage · velocity ratio
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Thermodynamics • Mechanical Design
This simulation demonstrates the Four-Stroke Cycle (Otto cycle for Petrol, Diesel cycle for Diesel) used in most internal combustion engines.
Toggle between modes to see key differences:
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The internal combustion engine converts chemical energy in fuel into mechanical work through a repeating four-stroke cycle of intake, compression, power, and exhaust. This simulation animates each stroke and plots the corresponding P-V (indicator) diagram so you can see how pressure and volume change inside the cylinder throughout the cycle. Adjusting compression ratio and spark timing reveals how these parameters drive thermal efficiency and peak cylinder pressure.
four-stroke cycle · compression ratio · ignition timing · P-V diagram · thermal efficiency · internal combustion
Free to use in your browser — no signup required. Found a bug or have an idea to make it better? Tell us.