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Diesel Cycle: Compression-Ignition Engine Simulator

Interactive 3D Diesel-cycle engine: watch the piston, connecting rod and crankshaft turn through compression, constant-pressure fuel injection and isentropic expansion, with a live P-V diagram, thermal efficiency and peak pressure/temperature readouts.

Thermodynamics3DModerate60 FPS📱 Mobile-adapted⇄ 2D version

A real-time 3D model of the air-standard Diesel cycle — the thermodynamic cycle behind every compression-ignition engine, from generator sets to ships. A piston, connecting rod and crankshaft turn through isentropic compression, constant-pressure fuel injection and isentropic expansion, exactly tracking the P1V1^γ = P2V2^γ relations that govern each stroke. Adjust the compression ratio and cutoff (fuel-injection) ratio and watch thermal efficiency, peak cylinder pressure and peak temperature update live alongside a synchronized P–V diagram, so the trade-off between more injected fuel (more power) and lower efficiency is visible stroke by stroke rather than just stated as a formula.

⚙ Under the hood

Watch a piston, connecting rod and crankshaft turn through the air-standard Diesel cycle — isentropic compression, constant-pressure fuel injection and isentropic expansion — with a live P-V diagram, thermal efficiency and peak pressure/temperature readouts.

thermodynamicsdiesel cycleheat enginecompression ignitionP-V diagramefficiency

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install