I recently learned that train engines have been using electric motors powered by diesel generators since at least the 30’s, which surprised me. It made me wonder why cars or at least trucks and busses don’t do something similar, and why “parallel” hybrids are the only type of hybrid engine widely available.
I assume it has to do with the size difference, but what specifically? Needs to carry too much liquid fuel? Generator or electronics can’t be miniaturized? Or is it a purely economic problem and not a technological one?
In: Engineering
I’m not 100% sure but I think that Opel Ampera 2012, Chevy Volt and BMW i3 used or use this configuration. Edit : But they also have batteries too so combustion engine basically only extends range. Trains use it because they are very heavy and clutch would be quickly destroyed. There are also diesel hydraulic trains.
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