Tokuji Muramatsu

Title: Tokuji Muramatsu: Innovator in Engine Technology

Introduction

Tokuji Muramatsu is a notable inventor based in Iwata, Japan. He has made significant contributions to engine technology, particularly in fuel injection systems and intake systems. With a total of 3 patents, his work has had a lasting impact on the automotive industry.

Latest Patents

Muramatsu's latest patents include a fuel air injector and an intake system for engines. The fuel air injector features four embodiments designed to minimize variations in fuel discharge caused by pressure differences between the injector valve and its seat. This is achieved by incorporating a restricted orifice downstream of the fuel injection point, which dampens combustion chamber pressures. The injector valve is a poppet valve with a specially configured stem that allows for smooth operation while maintaining effective fuel flow. In two of the embodiments, fuel is delivered above the configured portion of the poppet valve, while in the other two, it is delivered below, enhancing responsiveness.

The intake system for engines consists of several embodiments that improve charging efficiency. It features a closed branch passage that creates a volume in the intake tract between the throttle valve and the engine chamber discharge point. This design is applicable to both four and two-cycle engines. Additionally, a plenum chamber is included to increase the effective volume of the branch passage without significantly extending its length. Certain embodiments are oriented to enhance turbulence during the intake cycle, thereby improving combustion efficiency.

Career Highlights

Throughout his career, Tokuji Muramatsu has worked with prominent companies in the automotive sector, including Yamaha Hatsudoki Kabushiki Kaisha and Yamaha Motor Company Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in engine technology.

Collaborations

Muramatsu has collaborated with notable colleagues such as Noritaka Matsuo and Koichiro Takeuchi. Their combined expertise has contributed to the advancement of engine technology and the successful development of Muramatsu's patents.

Conclusion

Tokuji Muramatsu is a distinguished inventor whose work in fuel injection and engine intake systems has significantly influenced the automotive industry. His innovative patents continue to pave the way for advancements in engine technology.