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For the Inventor, By the Inventor

Yokosuka, Japan

Meroji Nakai

This inventor holds 12 USPTO granted patents. Top assignee: Nissan Motor Company Limited. Active years: 1976-1985.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Meroji Nakai. Retrieved from https://idiyas.com/inventor/meroji-nakai

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 12

% Patents Active = 100.0

Average Co-Inventor Count = 3.7

ph-index = 6

Forward Citations = 175(Granted Patents)


Location History:

  • Yokohama, JA (1976)
  • Yokosuka, JP (1981 - 1985)

Company Filing History:

goldMedal12 out of 13,420 
 
Nissan Motor Company Limited
 patents

Years Active: 1976-1985

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12 patents (USPTO):Explore Patents
1. 4502454 - Ignition system for an internal combustion engine (1985-03-05),
2. 4497306 - Ignition system for an internal combustion engine (1985-02-05),
3. 4475492 - System for forcefully igniting sprayed fuel of a diesel engine during (1984-10-09),
4. 4457285 - Sustained arc ignition system for an internal combustion engine (1984-07-03),
5. 4442821 - Internal combustion engine ignition method (1984-04-17),
6. 4419601 - Spark plug for internal combustion engine (1983-12-06),
7. 4398526 - Plasma ignition system for internal combustion engine (1983-08-16),
8. 4354136 - Ignition plug for internal combustion engine (1982-10-12),
9. 4271795 - Internal combustion engine with dual induction system and with fuel (1981-06-09),
10. 4270500 - Internal combustion engine with dual induction system (1981-06-02),
11. 4246874 - Internal combustion engine with dual induction system and with fuel (1981-01-27),
12. 3982513 - Carburetor for torch ignited engine (1976-09-28),

Title: Meroji Nakai: Innovator in Ignition Systems

Introduction

Meroji Nakai is a prominent inventor based in Yokosuka, Japan. He has made significant contributions to the field of automotive technology, particularly in ignition systems for internal combustion engines. With a total of 12 patents to his name, Nakai's work has had a substantial impact on engine efficiency and performance.

Latest Patents

Nakai's latest patents focus on innovative ignition systems designed to enhance the functionality of multi-cylinder internal combustion engines. One of his notable inventions eliminates high-voltage cables and mechanical distributors, thereby reducing electrical power losses caused by the joule effect. This system includes multiple ignition coils and plugs, each dedicated to a cylinder, along with a distribution unit for advance-angle control signals. Additionally, a booster is integrated to enhance the supply voltage, allowing for a more compact ignition coil design.

Another significant patent involves an ignition system where the ignition coil and spark plug are integrally assembled within each engine cylinder. This design aims to eliminate ignition energy transmission loss. A DC-DC converter is utilized to boost a low DC voltage into a high DC voltage, optimizing the ignition of the air-fuel mixture. The system adapts to various engine operating conditions, ensuring efficient performance.

Career Highlights

Meroji Nakai is currently employed at Nissan Motor Company Limited, where he continues to innovate and develop advanced automotive technologies. His work has been instrumental in improving engine performance and efficiency, making him a valuable asset to the company.

Collaborations

Nakai has collaborated with notable colleagues such as Yasuhiko Nakagawa and Kyugo Hamai. Their combined expertise has contributed to the successful development of cutting-edge ignition systems.

Conclusion

Meroji Nakai's contributions to ignition system technology have positioned him as a leading inventor in the automotive industry. His innovative patents reflect a commitment to enhancing engine efficiency and performance. Nakai's work continues to influence the future of automotive engineering.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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