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EV heavy duty trucks transmissions are 2-4 gears due to the high torque band. ICE vehicle engines must maintain a minimum idle speed and so a torque converter h
by throwawaaarrgh 4y ago
EV heavy duty trucks transmissions are 2-4 gears due to the high torque band. ICE vehicle engines must maintain a minimum idle speed and so a torque converter has to be used to match speed. But EV engines can run just fine at 1 RPM, so the vehicle can easily start from a dead stop in first gear automatically. Just put it in gear and press the accelerator.
- ilyt 4y agoEV doesn't need "gear" in the first place, engine can be directly connected at all times. There are some EVs that have 2 speed gear box to get max of the performance out of the engine but that's almost exclusively for performance vehicles.
- fomine3 4y agoEV heavy duty trucks are also high performance vehicle.
- hot_gril 4y agoSingle-gear EVs are significantly less efficient at freeway speeds. They can benefit from a second gear, but it seems this isn't considered worth the extra cost.
- throwawaaarrgh 4y agoAn ICE car doesn't "need" more than one gear either, but it would be extremely inefficient with just 1. More gears means lower torque and power required at sustained load and speed. Hence why most EV truck transmissions (light, medium and heavy duty) have more than one gear.
- SoftTalker 4y agoEVs don't have engines. They have motors.