Electric vehicles (EVs) have been gaining popularity in recent years due to their environmental benefits and lower operating costs. Unlike internal combustion engines, electric motors do not require multi-speed transmissions because they can produce maximum torque at any speed. This means that EVs typically have single-speed transmissions, with the exception of a few models like the Porsche Taycan, which features a 2-speed transmission. However, Stellantis, an automaker formed by the merger of Fiat Chrysler and PSA Group, is exploring the idea of simulating multiple gears in single-speed EV transmissions to enhance the driving experience.
In September, the United States Patent and Trademark Office (USPTO) published a Stellantis patent application titled “Simulated Shifts and Modes for Battery Electric Vehicles Driving.” This patent describes a system that adjusts the torque output of electric motors to simulate the shift points of a conventional automotive automatic transmission with four or more speeds. The goal is to create a more engaging and immersive driving experience for EV owners.
One of the main reasons why EVs typically have single-speed transmissions is that electric motors can deliver their maximum torque instantly, regardless of the speed. Unlike internal combustion engines that rely on gear ratios to match engine rpm with wheel speed, electric motors can provide instantaneous power. This eliminates the need for multiple gears in most EVs. However, Stellantis believes that the absence of shifting in EVs can make the driving experience feel monotonous or boring to some drivers.
To address this concern, Stellantis plans to introduce simulated shift points in their single-speed EV transmissions. This can be achieved by using sensors to detect specific driving conditions or inputs and then adjusting the torque output of the electric motors accordingly. For example, the control module could temporarily alter the torque output at points where an actual transmission would shift gears. This simulated shifting can be programmed to mimic the behavior of a conventional automatic transmission, creating a sense of gear changes even in a single-speed EV.
Related Post
The patent application also discusses the possibility of combining simulated shift points with programmable drive modes and torque vectoring. Programmable drive modes would allow drivers to customize the driving characteristics of their EVs, including the simulated shift points. Torque vectoring, on the other hand, can be used to induce oversteer or enable a “crab walk” function, further enhancing the driving experience. By combining these features, Stellantis aims to make EVs more enjoyable and involving to drive, similar to internal combustion cars.
The introduction of simulated shift points in single-speed EV transmissions would not require significant additional hardware. Instead, it relies on software algorithms and control modules to adjust the torque output of the electric motors. Stellantis believes that this technology can be seamlessly integrated into existing EV platforms, making it a cost-effective solution to enhance the driving experience.
While the patent application focuses on Stellantis’ plans for their upcoming Dodge electric muscle car, it is possible that this technology could be applied to other EV models in the future. Stellantis is not the only automaker exploring ways to make EVs more engaging. Hyundai’s Ioniq 5 N features an N e-shift function that simulates the feeling of an 8-speed dual-clutch automatic transmission. Similarly, Volkswagen’s ID.GTI electric hot hatch concept can be programmed to behave like classic GTI models. Toyota is even considering adding a physical shifter and clutch pedal to an electric sports car, although it would not be connected to the driveline.
In conclusion, Stellantis is considering incorporating simulated shift points in their single-speed EV transmissions to create a more involved and enjoyable driving experience. By adjusting the torque output of the electric motors, Stellantis aims to simulate the feel of multiple gears in a conventional automatic transmission. While this technology is still in the patent application stage and may not guarantee production, it showcases the industry’s efforts to bridge the gap between EVs and internal combustion cars in terms of driving experience and engagement. As EV technology continues to evolve, we can expect more innovations like simulated shifting to further enhance the appeal of electric vehicles.
