FEV Plug In Hybrid Two Speed Trans On Display at SAE World Congress

APR 10 2014 BY MARK KANE 6

FEV North America announced recently that at the SAE World Congress held now (April 8-10, 2014) it will be exhibiting its latest transmission for plug-in hybrids.  The new unit will have a 2-speed pure electric driving mode and parallel mode for efficient highway driving.

FEV Facility

FEV Facility

“Engine downsizing for increased fuel efficiency and reduced emissions, either alone or as part of an extended range hybrid system, has led to challenges for transmission developers who are being asked to provide higher levels of capability in a smaller package that can be used in a downsized engine compartment.  At the same time, it is desirable to reduce mechanical complexity and increase robustness.  FEV has used a clean sheet approach to develop a transmission with such capability.”

“The plug-in hybrid transmission’s capabilities include 2-speed pure electric driving mode, use as an ICE range extender in parallel mode for efficient highway driving, and a highly flexible eCVT mode (power split) that features excellent launch performance without clutch slippage.  The transmission does not use a torque converter and includes only one electric machine.”

Functionality includes the following:

  • Electric drive mode with two ratios
  • Full hybrid functionality including e-boost and regen
  • Superior launch performance using either ICE or e-motor
  • Creep behavior similar to conventional automatic transmissions
  • Excellent fuel economy enabled by elimination of torque converter and use of a highly efficient parallel mode of operation

The open question is do you think an automaker is now preparing a 2-speed EV-mode plug-in hybrid for a future model or is this trans just a concept?

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6 Comments on "FEV Plug In Hybrid Two Speed Trans On Display at SAE World Congress"

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Its like having 2 gear boxes and you can switch between them??

Silly question, what is an FEV? Is that synonymous with FCEV, or is it Full electric vehicle?

Wouldn’t that trnsmission just be an electric transmission then?

Sorry for my confusion, but the FEV versus FCEV in discussions always throws me. 🙂

Oh wait, is FEV a company? LOL. I swear I’ve heard people talk about fuel cells and FEV’s interchangeably before. Maybe not.

So wait, this is 2 transmissions in 1? It has an eCVT for ICE operation and a 2 speed for EV operation? No wonder it looks so large.

The Volt trans is all you need.
You don’t need 2 speeds in EV mode.
I like the photo though and any article about trannys.

Thx Mark!

Transmission is non-sense in electric vehicles. The model S doesn’t use it and the BMW i3 doesn’t use it either. For the range extender you need a serial system with an electric connection not a parallel system that force you to use crank and shaft generators only, which is a mistake since you don’t have access to non rotary generators.