Manuals you'll miss in 2019...

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Rope-Pusher
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Re: Manuals you'll miss in 2019...

Post by Rope-Pusher » Sat Feb 20, 2021 1:30 pm

ClutchFork wrote:
Sat Feb 20, 2021 10:58 am
Rope-Pusher wrote:
Thu Feb 18, 2021 7:23 pm
IMBoring25 wrote:
Fri Jan 22, 2021 3:41 pm
The difference is that the performance/efficiency tradeoff for saving the cost, weight, and complexity of a multispeed transmission with an ICE is crippling (so much so that the Model T was a two-speed), while the performance/efficiency benefit of adding the cost, weight, and complexity of a multispeed transmission to an electric drive system is comparatively small.
This company thinks they can generate savings on right-sizing the electric motor and batteries with their 2-Speed trans for electric vehicles.

In the article there is a link to an animation that shows shifts being accomplished under load.

https://www.sae.org/news/2021/02/inmoti ... efficiency
I would think that a CVT would be the way to go with an electric vehicle no?
I don't think they're trying to keep the electric motor running in its "Sweet Spot", since it has a fairly broad operating range, but more to offer a low range for starting up a grade with a heavy load and then a cruising range for high-speed driving while avoiding relatively high motor rpms.
Last edited by Rope-Pusher on Sun Feb 21, 2021 11:42 am, edited 1 time in total.
'08 Jeep Liberty 6-Speed MT - "Last of the Mohicans"

IMBoring25
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Re: Manuals you'll miss in 2019...

Post by IMBoring25 » Sun Feb 21, 2021 1:12 am

A CVT is used to deal with a power source with a narrow powerband and is best used in low-torque applications. Both of those things are the opposite of what you get with an electric motor.

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ClutchFork
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Re: Manuals you'll miss in 2019...

Post by ClutchFork » Sun Feb 21, 2021 9:10 pm

I see, but this image suggests there is some limitation on power band, but certainly a broad power band:
Image
Stick shiftin since '77
theholycow wrote:Why in the world would you even want to be as smooth as an automatic? Might as well just drive an automatic...

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