this post was submitted on 17 Dec 2025
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Electric Vehicles
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Its a fully electric drivetrain with a gas generator. When the battery runs low you can recharge it (even while driving) using the generator.
So you don't have the complexity of a combined hybrid drivetrain, but instead a normal BEV one plus a power generator, both of which are very well understood problems.
Another benefit is that the generator can always run at its most efficient rpm/power point and is decoupled from the speed of the wheels.
Interestingly Wankel engines have been making a bit of a comeback for this purpose since they can be built more compactly for the same output power.
A drawback compared to hybrid drivetrains is that both components need to be built for "full" load, whilst a hybrid drivetrain can combine powers to reach maximum performance, meaning each of the motors only has to carry half (or part) of the total load.
Thanks for the explanation, thats pretty cool! I drive a hybrid and love it, I can get between 4.6-6.0 L/100km depending on the season. It flip flops between EV and engine modes, I can go well over 800 km on a tank. That system is fascinating.