Xiaomi Files Patent for Underwater Propulsion System to Boost Amphibious Vehicle Efficiency

Xiaomi recently unveiled a utility model patent titled "Underwater Propulsor and Vehicle," focusing on amphibious vehicle technology. The patent introduces guide vanes and flow channels within the propulsor to reconfigure the water flow path: water is first uniformly converged by the guide structures, then flows smoothly through the blade area before being gently discharged. This design effectively suppresses lateral flow and cavitation. Conventional underwater propulsors tend to generate cavitation at high speeds, leading to reduced thrust, increased noise, and accelerated component wear. Xiaomi's design mitigates these issues significantly. The practical benefits of this solution include reduced operational noise, enhanced thrust, stabilized flow conditions, and controlled energy loss—collectively improving the propulsor’s efficiency and service life to support extended on-water driving requirements. Currently, two vehicles in the Chinese market—the BYD Yangwang U8 and Jetour Traveller G700—already offer amphibious capabilities. The Yangwang U8 uses four electric motors to drive wheels for propulsion through water, while the Jetour employs a dedicated turbine propulsor. Xiaomi’s approach adopts an independent propulsion system similar to Jetour’s but features proprietary flow-optimization structures. At this stage, the patent serves solely as a technological reserve, with no specific vehicle integration or mass-production plans announced yet.