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Originally Posted by NeilBlanchard
Right, and the difference in efficiency between 3rd gear and 4th gear was about 2%.
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Actually they are saying a 3 speed can improve EV efficiency by about 20% in real world conditions.
Quote:
Originally Posted by NeilBlanchard
... The torque of an electric motor is much harder to deal with than an ICE. There is an order of magnitude of difference in the quickness of the increase in torque, and this is very hard on the gears...
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Do you have even one link or source to back that claim up? Ever seen the oscillations pistons introduce to a driveline? The tesla isn't a two speed because of marketing pressures and poor design:
Tesla CEO on Brush With Death Due to Transmission Troubles — Cleantech News and Analysis
"We learned that the car industry is unbelievably good at delivering what they’ve done in the past with a little tweak — faster, or in yellow. But if you want something a lot different — a simplified transmission that’s electrically actuated — that’s too radical. The designers and engineers who can do radical changes all left Detroit forty years ago."