Hyundai Transys Developed EV’s AWD Disconnector

by Jul 8, 2021All News, Hyundai, Slider, Technical0 comments


HYUNDAI TRANSYS has successfully developed the first electric vehicle (EV) all-wheel drive (AWD) disconnector system in the world, entering mass production starting last month.

The EV AWD disconnector system is a device attached to the EV system’s reducer, disconnecting or connecting motors and drive shafts according to the environment.

This allows the vehicle to disconnect the secondary axle from AWD in unnecessary circumstances, such as in snow or rough terrain, and transition the system to 2WD to enhance the vehicle’s energy efficiency.

As such, this innovative system reduces energy waste and enhances efficiency by 6%–8%, as well as improves product efficacy through more economical use of space. HYUNDAI TRANSYS boasts an excellent track record in R&D with several developments, such as its reducer system with excellent noise, vibration, and harshness (NVH) and durability. 

The successful development of the EV AWD disconnector system is the first step in the company’s evolution from the internal combustion age to the EV era. While AWD disconnectors for internal combustion engines are available in the market, HYUNDAI TRANSYS is the first to develop the technology for EV use.


A HYUNDAI TRANSYS representative explained that because of differences in propulsion methods, EV disconnectors must consider significant challenges in development, such as noise and transfer shock not found in internal combustion engines.

Another complicating factor was the relative simplicity of EV reducers compared to their equivalents in internal combustion engines, making it conversely more difficult to enhance the system’s efficiency. 

HYUNDAI TRANSYS established its expertise by studying reducer systems employed in various mobility systems outside of internal combustion engines, such as tanks and high-speed trains. This technological expertise formed the basis of its triumph, helping it develop significant improvements, such as noise generation removal and continued improvements in durability. 

“Our new disconnector system is the core technology that allows us to enhance the most important metric for EV customers, which is range, and guarantee the vehicle’s performance at the same time,” a member of the EV reducer R&D team commented. “Our technological expertise allowed us to establish this new edge for the company through a specialized EV reducer system unique to TRANSYS and TRANSYS only.”

HYUNDAI TRANSYS’s EV AWD disconnector system will be used in Hyundai Motor Company’s dedicated EV platform E-GMP and applied to the Hyundai IONIQ 5 product line for the first time. 

The company plans to expand the system’s application to other product lines in its bid to establish dominance in the global EV market.

Written by Jose Antonio Lopez

Passionated about Korean cars from Hyundai, Kia & Genesis. Photographer. I love being in nature, hiking. Tech lover.

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