Company Filing History:
3 out of 13,411 
1 out of 1 Years Active: 1979-1980
Title: The Innovations of Nagayuki Marumo
Introduction
Nagayuki Marumo is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of automotive technology, particularly in the area of engine systems. With a total of 3 patents to his name, Marumo's work reflects a deep understanding of internal combustion engines and their operational efficiencies.
Latest Patents
One of Marumo's latest patents is an engine load detection system for automatic power transmission. This system addresses the challenge of accurately detecting engine load in multicylinder internal combustion engines where intake vacuum is not a reliable indicator. The detection system utilizes an electrical actuator that responds to signals representing engine load, allowing for the adjustment of fluid pressure in the automatic power transmission system. This innovation includes an intake air sensor and an engine speed sensor, which work together to provide a true indication of engine load, unaffected by factors such as exhaust gas recirculation.
Another significant patent by Marumo is related to the split engine operation of a closed loop controlled multi-cylinder internal combustion engine. This invention allows for the suspension of feedback control during split engine operation mode, resuming it during full cylinder operation. A relay is integrated into the system to manage the supply of output from a PI detector to the fuel injection control unit, ensuring efficient engine performance.
Career Highlights
Throughout his career, Nagayuki Marumo has worked with prominent companies in the automotive industry, including Nissan Motor Company Limited and The Toyo Rubber Co., Ltd. His experience in these organizations has contributed to his expertise in engine technology and innovation.
Collaborations
Marumo has collaborated with notable colleagues such as Haruhiko Iizuka and Keiichiro Yabuta. These partnerships have likely enhanced his research and development efforts, leading to the successful creation of his patents.
Conclusion
Nagayuki Marumo's contributions to automotive technology through his innovative patents demonstrate his expertise and commitment to improving engine performance. His work continues to influence the industry and pave the way for future advancements.