To summarize this video, however, EV motors function well at a broad RPM range. Video can’t be loaded because JavaScript is disabled: Why Do Electric Cars Only Have 1 Gear? () If you’re interested in the maths behind this, a great video is: As a result, an electric car only needs a single gear to function (unlike the ‘fussier’ ICEs which require gears to deliver the best torque). They have high-RPM electric motors which can apply the necessary torque in a much more fine-grained, consistent approach across RPM levels. This is entirely different with electric cars. Hence to keep things efficient, ICE (aka gasoline) cars have multiple gears which allow the engine to spin at the most ideal RPM range for the most ideal torque to be applied. ![]() ![]() In conventional ICE cars, the ICE only generates usable torque in a fairly narrow band of RPM (engine ‘spin’ speed). This is done by applying torque (rotational ‘movement’ energy). So as we mentioned above, the transmission is designed to ultimately turn the wheels. It usually needs changing every 30,000 miles or so in a conventional car. It also helps to cool things down, acting as a heat dissipator. In an automatic car, there’s an automatic transmission/gear shifter system which detects when a gear needs to change and applies this disconnect and change automatically.īecause this is a mechanical operation (aka there’s various moving parts), transmission fluid is needed to keep all the parts working together smoothly: transmission fluid is a slippery lubricant liquid. ![]() In a manual car, the clutch is the thing that allows you to ‘disconnect’ and change gear. Whilst with a gasoline car, the transmission is the thing that provides the necessary disconnect with the engine to allow for the gear to be shifted upwards or downwards. With a bicycle, this is done via the chain operation. However gears can’t simply be changed to another gear: since it’s a mechanical operation, a ‘disconnect’ is needed before the gear can be changed up or down. Transmission/gearing mechanism from a conventional car, via FreeImages
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