Stellantis is designing a two-speed transmission for use in electric off-roaders, a newly surfaced patent filing shows.
Most EVs use single-speed transmissions, as the instantly available torque of electric motors makes multiple gear ratios unnecessary. But in a patent application published by the United States Patent and Trademark Office on Jan. 23 , Stellantis argues that this may not be ideal for off-road vehicles.
The automaker notes that while off-roading generally requires a lot of torque at low speeds, the gearing that makes this possible isn't ideal for on-road efficiency and range. So Stellantis proposes including one gear for on-road driving and one for off-roading. The transmission itself would use two planetary gear sets in a housing mounted between an electric motor and an axle's half shafts, with clutches controlling torque output. These clutches would both engage one of the two gears and control output to the wheels.The clutches could also be used to rotate the half shafts in different directions, allowing an EV"to rotate about a pivot point to allow improved mobility on low friction," the application states.
A patent application does not serve as confirmation of production plans, but Stellantis has been experimenting with electric off-roaders with the. That's likely in preparation for the next-generation Jeep Wrangler, which according to a union document will be sold exclusively as either an
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