Location History:
- Saitama-ken, JP (2005)
- Saitama, JP (2006)
- Wako, JP (2001 - 2015)
- Torrance, CA (US) (2016)
Company Filing History:
4 out of 10,092 
2 out of 21,927 
2 out of 42,508 
Years Active: 2001-2016
Title: Innovations of Toshiharu Kumagai
Introduction
Toshiharu Kumagai is a notable inventor based in Wako, Japan. He has made significant contributions to the field of technology, particularly in the automotive sector. With a total of 7 patents to his name, Kumagai's work focuses on enhancing vehicle efficiency and functionality.
Latest Patents
One of his latest patents is related to a vehicle-to-grid control system. This innovative system provides a method for storing electrical charge in an electric vehicle connected to a charging station. The method includes attaining a minimum State of Charge (SOC) for the electric vehicle, determining a time to charge the vehicle to a maximum SOC, and maintaining the SOC by repeatedly charging and allowing discharge between the minimum SOC and a threshold. The vehicle is charged to the maximum SOC when the determined time has elapsed, ensuring efficient energy management.
Another significant patent is for a hybrid drive apparatus. In this invention, a first planetary gear mechanism transmits rotation from a first main shaft, which receives engine driving force, to a main speed-changing part. This mechanism allows for an extended range of gear ratios and enhances power generation efficiency by rotating the first motor/generator at high speeds without the need for a special speed increase device.
Career Highlights
Kumagai has worked with prominent companies in the automotive industry, including Honda Giken Kogyo Kabushiki Kaisha and Honda Motor Co., Ltd. His experience in these organizations has contributed to his expertise in developing innovative automotive technologies.
Collaborations
Throughout his career, Kumagai has collaborated with notable colleagues such as Sunao Ishihara and Isamu Sunaga. These collaborations have further enriched his work and led to advancements in automotive technology.
Conclusion
Toshiharu Kumagai's contributions to the field of automotive innovation are significant and impactful. His patents reflect a commitment to improving vehicle efficiency and functionality, showcasing his expertise as an inventor.