Quote:
Originally Posted by redpoint5
Now you've got me wondering... assuming exactly the same gear ratio between DCT and eCVT in the exact same car, traveling say 70 MPH, what is the difference in efficiency?
How do transmission losses compare between DCT and the planetary gears found in an eCVT?
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So you have your BSFC g/kWh graph with the islands of efficiency. Basically the car can target that super high efficiency island the entire time (a certain rpm and load and torque output), which makes up for the extreme loss the eCVT gives. But that loss really only dissapears in town when you are going up and down in speed. Targeting an exact 70mph on the interstate where both cars have been designed to get good gas mileage they are probably more or less on par for their maximum efficiencies.
I would say eCVT efficiency is around 82% and DCT is around 91%+ efficient.
I imagine if you just dyno'd a prius and ioniq new after break in on a dyno the same day you will see around the efficiency difference.