Company Filing History:
3 out of 18,700 
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Years Active: 2009-2017
Title: Joohang Lee: Innovator in Hydraulic Control Systems
Introduction
Joohang Lee is a notable inventor based in Yongin-si, South Korea. He has made significant contributions to the field of hydraulic control systems, particularly in automotive applications. With a total of 3 patents to his name, Lee's work has had a considerable impact on the efficiency and functionality of vehicle transmission systems.
Latest Patents
One of Joohang Lee's latest patents is a "Circuit for controlling hydraulic pressure of torque converter." This invention includes an engagement hydraulic pressure chamber that is independently installed within a fluid operation chamber. It features a torque converter control valve that stably decreases line pressure and supplies it as operational hydraulic pressure. Additionally, it incorporates a torque converter pressure control valve and a lock-up switch valve, both controlled by a linear solenoid valve, to enhance the performance of the torque converter.
Another significant patent is the "Auto transmission hydraulic pressure control apparatus." This apparatus consists of six friction elements, with two operating to achieve corresponding stages through hydraulic pressure. It includes five direct-controlled solenoid valves that manage hydraulic pressure for the friction elements, along with an on-off solenoid valve and a switch valve. The design also features four fail-safe valves that limit the arrangements of the friction elements, ensuring reliable operation.
Career Highlights
Joohang Lee has worked with prominent automotive companies, including Hyundai Motor Company and Kia Motors Corporation. His experience in these organizations has allowed him to develop innovative solutions that address complex challenges in vehicle transmission systems.
Collaborations
Throughout his career, Lee has collaborated with talented individuals such as Hyunjun Son and Hongseop Kim. These partnerships have contributed to the advancement of his inventions and the overall progress in hydraulic control technologies.
Conclusion
Joohang Lee's contributions to hydraulic control systems in the automotive industry demonstrate his innovative spirit and technical expertise. His patents reflect a commitment to enhancing vehicle performance and efficiency. Lee's work continues to influence the field, paving the way for future advancements in automotive technology.