Hisao Nakamura

Title: Hisao Nakamura - Innovator in Gaseous Fuel Measurement Technology

Introduction

Hisao Nakamura is a notable inventor based in Gunma, Japan. He has made significant contributions to the field of gaseous fuel measurement technology. His innovative approach has led to the development of a unique instrument that enhances the accuracy of flow rate measurements in gaseous fuel injectors.

Latest Patents

Hisao Nakamura holds a patent for an "Instantaneous flow rate measurement instrument of gaseous fuel injector." This invention involves a gaseous fuel injector that supplies fuel from a compressed gas cylinder into a measuring portion thin tube. The pressure change in the tube is measured by a pressure measuring device through a small hole provided in the thin tube. An extension thin tube is included to remove the influence of reflected waves on the downstream side of the measuring portion thin tube. Additionally, a back pressure valve is provided at the downstream end of the extension thin tube to uniformly increase the pressure in the tube, bringing it closer to the actual environment in the engine cylinder. A tapered-shape nozzle is arranged in the measuring portion thin tube, allowing the pressure measured by the device to be transduced into mass flow rate according to a predetermined calculation formula. This innovation enables the measurement of the instantaneous mass flow rate of gaseous fuel injected from the gaseous fuel injector.

Career Highlights

Hisao Nakamura is affiliated with Gunma University, where he continues to engage in research and development in his field. His work has been instrumental in advancing the technology related to gaseous fuel measurement.

Collaborations

Hisao Nakamura collaborates with esteemed colleagues, including Yasuhiro Fujiwara and Tomio Obokata. Their combined expertise contributes to the ongoing advancements in their research endeavors.

Conclusion

Hisao Nakamura's innovative contributions to the field of gaseous fuel measurement technology exemplify the impact of dedicated research and development. His patent for the instantaneous flow rate measurement instrument showcases his commitment to enhancing measurement accuracy in this critical area.