Electric cars: Only one gear instead of switching - that's the reason
Created: 03/21/2022, 09:30 am
By: Simon Mones
Unlike the combustion engine, an electric motor only needs one gear.
But why is that?
Munich – For many drivers, the manual transmission is simply part of it.
But some manufacturers see it differently, such as Volkswagen.
In the future, the Wolfsburg company will only rely on the automatic transmission.
But even that only seems to be a temporary solution until the electric car replaces the combustion engine.
Because unlike diesel or petrol engines, the Stromer get by with just one gear, as 24auto.de reports.
Switching is therefore no longer necessary - whether manually or automatically.
But why is that actually the case?
Jason Fenske from Engineering Explained provides the answer in a YouTube video.
Electric cars: Only one gear instead of switching - that's the reason
Basically, it can be said that the high speed of the electric motors ensures that one gear is sufficient.
In addition, the Stromer motors are much more effective over the entire speed range and generate high torque even in low ranges.
The electric motor gets by with just one gear.
(Iconic image) © Matthias Balk/dpa
Meanwhile, a combustion engine needs several gears to reach its top speed.
However, engineers can tune an electric motor to the desired top speed.
Fenske takes Formula E as an example. The motor of the electric cars can reach more than 30,000 revolutions per minute.
Electric cars: Formula E cars as a calculation example
In his video, however, Fenske still assumes 20,000 revolutions per minute and a speed of 225 km/h.
So he comes up with the fact that a single gearbox can achieve this speed gear ratio of 11.4:1.
This means that no further gear is required to reach top speed.
With the combustion engine, however, it looks different, as he calculates.
If you were to drive 20 km/h with a diesel or petrol engine with the same parameters, the speed of 530 rpm would be far too low.
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However, there are enough examples of things not disappearing just because they are no longer needed.
For example, the sound of the indicators is now artificially generated because the corresponding relays are no longer required.
It could be similar with shifting, because Toyota is already working on a technology to use the manual shift in electric cars.
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