Location History:
- Isesaki, JP (2009 - 2019)
- Hitachinaka, JP (2016 - 2021)
Company Filing History:
7 out of 2,028 
1 out of 42,508 
1 out of 1,220 
Years Active: 2009-2021
Title: Innovations by Yoshitatsu Nakamura
Introduction
Yoshitatsu Nakamura is a notable inventor based in Isesaki, Japan. He holds a total of 9 patents that contribute significantly to advancements in fuel injection technology for internal combustion engines. His work has been influential in improving engine efficiency and reducing fuel leakage.
Latest Patents
Nakamura's latest patents include a fuel injection control device and a fuel injection control method for internal combustion engines. This invention allows a fuel injection device to perform fuel injection even when the open periods of the intake and exhaust valves overlap. It sets the timing to start injection at the closing timing of the exhaust valve and ends injection when the deceleration rate of intake air speed reaches a local maximum. This innovation enhances the homogeneity of the in-cylinder air-fuel mixture while preventing fuel adhesion to the intake port's inner wall and minimizing blow-through of fuel to the exhaust passage.
Another significant patent is a control device and method for internal combustion engines that include a fuel injection valve and an electric fuel pump. This invention addresses the issue of fuel leakage during the engine's stop period. The control device stops the fuel pump and then the fuel injection, while increasing the total amount of fuel injection after the pump stops, as the fuel temperature decreases. This simple configuration effectively reduces fuel leakage from the injection valve.
Career Highlights
Nakamura has worked with prominent companies such as Hitachi Automotive Systems and Hitachi, Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in automotive technology.
Collaborations
Some of his notable coworkers include Tomoyuki Murakami and Atsushi Murai. Their collaboration has likely contributed to the success of Nakamura's inventions.
Conclusion
Yoshitatsu Nakamura's contributions to fuel injection technology demonstrate his innovative spirit and commitment to improving internal combustion engine performance. His patents reflect a deep understanding of engineering principles and a dedication to advancing automotive technology.