Hyundai WIA. has filed a patent for an apparatus to control electric vehicles, featuring a twin clutch system, vehicle controller for slip rate calculation, and clutch controller for synchronization. The technology aims to enhance control and performance in drifted driving mode. GlobalData’s report on Hyundai WIA gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Hyundai WIA, EV integrated thermal mgmt was a key innovation area identified from patents. Hyundai WIA's grant share as of January 2024 was 23%. Grant share is based on the ratio of number of grants to total number of patents.

Electric vehicle control system with synchronized rear wheel slip rates

Source: United States Patent and Trademark Office (USPTO). Credit: Hyundai WIA Corp

The patent application (Publication Number: US20240034158A1) describes an apparatus and method for controlling a vehicle in a drift driving mode. The apparatus includes a twin clutch system, a vehicle controller, and a clutch controller. The vehicle controller determines a target slip rate for the rear wheels and controls regenerative braking torque to match the target slip rate when specific entry conditions are met. The clutch controller synchronizes the slip rates of the rear wheels by adjusting clutch torques of the twin clutch.

The entry conditions for entering the drift driving mode include the accelerator pedal signal being off, the brake pedal signal being off, and the paddle shift being on for a predetermined time period. The target slip rate is determined based on the vehicle speed and is inversely proportional to it. The clutch controller ensures that the clutch torques are adjusted appropriately, with the torque for the turning internal rear wheel being greater than the external rear wheel. Additionally, the vehicle controller can switch back to normal driving mode when a release condition, such as receiving a manipulation signal from the accelerator pedal, is satisfied. Overall, the apparatus and method provide a sophisticated control system for managing the vehicle's behavior during drift driving mode, enhancing safety and performance.

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