Hyundai WIA has been granted a patent for a limited slip differential technology that enables seamless transition between medium-torque and high-torque transmission states during vehicle operation. The system includes specific components like clutch plates and pistons for efficient torque distribution. 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 May 2024 was 33%. Grant share is based on the ratio of number of grants to total number of patents.
Limited slip differential for vehicle torque transition control
The granted patent (Publication Number: US12000468B2) discloses a limited slip differential system comprising an input shaft connected to a differential case, an output shaft connected to a wheel via a clutch pack, and medium-torque and high-torque transmission means for engaging the clutch pack and synchronizing the input and output shafts. The high-torque transmission means includes a hub with outer teeth meshed with inner teeth on a clutch plate, controlled by a second piston. The output retainer is integrally formed with the output shaft, providing structural support for the hub. The medium-torque transmission means involves a first piston pressing the clutch plate to engage the clutch pack, allowing for controlled torque distribution.
Furthermore, the patent includes a method for controlling the operation of the limited slip differential system. The method involves a medium-torque transmission step where the clutch pack is engaged by pressing the clutch plate, and a high-torque transmission step where the hub is meshed with the clutch plate to synchronize the input and output shafts. This control method allows for efficient torque distribution based on the driving conditions of the vehicle, ensuring optimal performance and stability. The design of the limited slip differential system and the corresponding control method aim to enhance traction and handling capabilities, particularly in challenging driving conditions where varying torque distribution is crucial for vehicle stability and control.
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