Summary
- Stellantis is working on multi-speed transmissions for electric vehicles to improve efficiency
- The USPTO published a patent application on Feb. 27, 2025, focusing on adding a second forward gear to drive modules for EVs
- The patent application discusses using magnetic fluid to shift between gears more efficiently
- Stellantis is considering the use of multi-speed transmissions for electrified vehicles including hybrids and plug-in hybrids
- This is the second recent patent filing by Stellantis for multi-speed transmissions for electric motors, with other automakers like Porsche and Mercedes considering similar technology
Article
Stellantis has recently filed a patent with the United States Patent and Trademark Office (USPTO) that focuses on adding a second forward gear to the drive modules used in electric vehicles (EVs). The patent application discusses how the transmission would shift between the two gears, using magnetic fluid to move the shafts holding individual gears into position more efficiently. This method is said to be more effective than conventional hydraulically-actuated clutches. The document refers to “electrified vehicles” rather than just EVs, indicating that the technology could be used in hybrids and plug-in hybrids as well.
The use of multi-speed transmissions in electric vehicles is not new, with the Porsche Taycan being a prominent example. Mercedes and Lucid have also patented their own versions of multi-speed transmissions for future EVs. Stellantis had previously filed another patent related to a multi-speed transmission for electric motors, focusing on off-road use with a different gear-actuation mechanism. While some automakers are exploring this technology, others like Volkswagen have indicated that they will not be pursuing multi-speed transmissions for their electric vehicles. Honda, on the other hand, has designed a manual transmission with a clutch pedal for its upcoming 0 Series EVs in an effort to appeal to car enthusiasts.
The focus on improving the efficiency of electric vehicles through multi-speed transmissions suggests that automakers are looking for ways to optimize the performance and range of EVs. By adding a second gear to the drive modules used in EVs, Stellantis aims to enhance the shifting process using magnetic fluid technology. This innovation could potentially benefit hybrid and plug-in hybrid vehicles as well, expanding the reach of the technology beyond traditional EVs. The patent filing reflects the ongoing efforts of automakers to innovate and adapt to the evolving automotive industry, particularly as electric vehicles become increasingly popular.
The use of magnetic fluid in the transmission shifting process represents a departure from conventional methods, potentially offering a more efficient and precise way to switch between gears in electric vehicles. Stellantis’ focus on electrified vehicles, including hybrids and plug-in hybrids, indicates a broader application of the technology beyond just pure electric vehicles. The competitive landscape for electric vehicles is driving automakers to explore new technologies and solutions to meet the demands of consumers for more efficient and reliable electric vehicles, leading to advancements such as multi-speed transmissions in EVs.
In conclusion, Stellantis’ patent filing for a multi-speed transmission in electric vehicles showcases the company’s commitment to innovation and efficiency in the rapidly changing automotive industry. By focusing on improving the shifting process using magnetic fluid technology, Stellantis aims to enhance the performance and range of electric vehicles, as well as hybrid and plug-in hybrid models. The use of multi-speed transmissions in EVs is not new, with other automakers also exploring similar technologies for future electric vehicles. This reflects the growing competition and innovation in the electric vehicle market as automakers continue to push the boundaries of what is possible in this rapidly evolving industry.
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