- Stellantis files patent WO/2025/184156 for tri-motor EREV with onboard gas generator.
- Ramcharger’s two-motor EREV layout could evolve into a three-motor system.
- Chinese EREVs like Maextro S800 and Yangwang U8 show proof of concept.
Stellantis has had a lot going on lately. While the headlines have mostly circled around the return of the Hemi V8, the company hasn’t slowed its march toward electrification. A recently published patent outlines a system designed to manage torque between three electric motors and an additional torque source. That extra source appears to be a gasoline engine, which suggests Stellantis is laying the groundwork for new extended-range EVs.
The patent in question, WO/2025/184156, describes solving a three-dimensional optimization problem to balance torque delivery across each motor and the generator while keeping the battery charged. Essentially, it’s a roadmap for controlling a highly complex EREV platform.
More: Breakthrough EV Battery Patent Could Charge In Minutes And Cross A Continent
Filed by FCA US LLC (yes, Stellantis is still using FCA officially for its North American operations) and published on September 4, 2025, the document represents the first time we’ve heard about this tri-motor EREV configuration from the automaker. The claim itself is very focused on the technical challenges, coordinating multiple drive units and generator output, but the potential application is what we find exciting.
Where Could It Fit?
What could this powertrain end up in? The folks over at CarBuzz think the next-gen Ram pickup is the most obvious answer. The Ramcharger already uses an EREV setup, and a tri-motor version could make for something capable of rivaling the Tesla Cybertruck but with more range. It could potentially tow more, too. Still, we think there could be a better application.
In China, the Maeextro S800 pairs three electric motors with a 1.5-liter turbo generator for up to 1,333 km (828 miles) of combined range, and the Yangwang U8 uses four individual wheel motors plus a 2.0-liter engine to deliver supercar-level performance and nearly 1,000 km 640 miles) range.
A New Chrysler Flagship?
This could be Chrysler’s opportunity to return with a statement vehicle. The brand currently sells only minivans and hasn’t had a proper flagship since the 300. A new Imperial equipped with a sophisticated tri-motor EREV powertrain could mark a dramatic re-entry into the luxury space, positioning Chrysler with something distinctive in a crowded market.
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