Stellantis Files Patent For A Two-Speed Gearbox For Off-Road EVs

Stellantis recently filed a patent that caught our eye that could be very beneficial to future Jeep® electric vehicles (EVs). Their latest patent introduces a cutting-edge gearbox designed specifically to enhance performance and versatility for electric-powered off-road adventures. Let’s delve into the details of this groundbreaking technology and how it’s set to revolutionize the off-road driving experience.

Overview of the Patent –

Off-road driving demands sustained high torque operation, essential for conquering rugged terrain. While internal combustion engine (ICE) vehicles achieve this through additional gearing in the transfer case, battery electric vehicles typically rely on single-speed gearboxes. While effective for torque delivery, single-speed gearboxes struggle to sustain high torque levels required for prolonged off-road excursions. Although higher ratio gearing can compensate, it compromises on-road performance and range. Recognizing this limitation, the newly patented gearbox assembly is designed specifically for electric off-road vehicles, offering sustained high torque capability without sacrificing on-road performance.

How It Works –

Imagine this gearbox assembly as the heart of an electric off-road vehicle, empowering it with the ability to tackle challenging terrains with ease. Here’s a simplified breakdown of its operation:

• Two-Speed Functionality: Unlike traditional single-speed gearboxes, this innovation offers two selectable gears: a high-speed gear for on-road driving and a low-speed gear for off-road adventures. This dual-gear system allows for optimized performance across diverse driving scenarios.
• Independent Clutch Control: The gearbox features twin planetary gear sets, each equipped with independent clutches. These clutches play a pivotal role in directing torque to the vehicle’s axles, enabling precise control over each wheel’s rotation. By selectively engaging or disengaging the clutches, drivers can tailor the vehicle’s behavior to match the demands of the terrain.
• Enhanced Mobility: In off-road situations, where traction and maneuverability are paramount, the gearbox shines. It empowers the vehicle to rotate around a pivot point, facilitating tight turns and overcoming obstacles with confidence. This agility is a game-changer for navigating challenging trails and rocky landscapes.

Gear Ratios –

In the off-road low-speed gear mode, the gearbox achieves a 3:1 reduction ratio, providing ample torque for conquering steep inclines and navigating rough terrain. Conversely, in the on-road high-speed gear mode, the gearbox operates at a 1:1 ratio, optimizing efficiency and performance for highway driving.

By integrating this advanced gearbox into Jeep models, drivers can expect unparalleled performance and versatility in electric off-road adventures. Whether conquering rocky trails or traversing muddy paths, these vehicles will excel in every terrain scenario, delivering an exhilarating driving experience.

With its two-speed functionality, independent clutch control, and enhanced mobility capabilities, it promises to elevate the performance and versatility of electric vehicles, particularly in demanding off-road environments.