Academy · Course

Engines 101

Five steps from "what does an engine actually do" to "why most of the fuel never moves the car". Each step points at the live pages to study, then checks you with three quick questions — instant feedback, nothing saved, retry as often as you like.

0 / 5

Course quiz → optional

Part 1 · The idea

01 · up nextWhat an engine actually doesEnergy changes costume: chemical → heat → pressure → rotation.also: Energy and combustion →Open lesson →self-check · optional

02The four strokesDraw in, squeeze, burn, push out — two crank turns, one push.Open lesson →self-check · optional

Part 2 · The working numbers

03Torque and powerThe strength of one twist vs how often you can deliver it.Open lesson →self-check · optional

04Mixture and timingThe right air-to-fuel recipe, lit at exactly the right moment.also: Ignition Timing & Knock, live →Open lesson →self-check · optional

Part 3 · The bill

05Where the energy goesRoughly 30% moves the car. The rest is heat — and physics says some must be.Open lesson →self-check · optional