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For the Inventor, By the Inventor

Aichi, Japan

Toshiharu Iwata

This inventor holds 32 USPTO granted patents, primarily in Ignition Timing Control. Top assignees: Nippondenso Co., Ltd., Nippon Soken, Inc., Toyota Jidosha Kogyo Kabushiki Kaisha. Active years: 1977-1995.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshiharu Iwata. Retrieved from https://idiyas.com/inventor/toshiharu-iwata

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

USPTO Granted Patents = 32

% Patents Active = 100.0

Average Co-Inventor Count = 3.4

ph-index = 10

Forward Citations = 343(Granted Patents)


Location History:

  • Okazaki, JA (1977 - 1978)
  • Okazaki, JP (1978 - 1981)
  • Aichi, JP (1980 - 1986)
  • Nukata, JP (1988 - 1995)

Company Filing History:

goldMedal17 out of 3,252 
 
Nippondenso Co., Ltd.
 patents
silverMedal15 out of 1,600 
 
Nippon Soken, Inc.
 patents
bronzeMedal6 out of 1,838 
 
Toyota Jidosha Kogyo Kabushiki Kaisha
 patents
where one patent can have more than one assignee

Years Active: 1977-1995

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Areas of Expertise:
Ignition Timing Control
Internal Combustion Engine
Knock Control System
Knocking Detection
Air-Fuel Mixture Ratio
Throttle Valve Control
Spark Plug
Overheat Prevention
Multi-Cylinder Engine
Engine Control
32 patents (USPTO):Explore Patents
1. 5404854 - Knock control system for internal combustion engine (1995-04-11),
2. 4760828 - Ignition timing controller for multi-cylinder engine (1988-08-02),
3. 4590565 - Ignition timing control for compensating knock in both steady-state and (1986-05-20),
4. 4541382 - Method and apparatus for ignition timing control of internal combustion (1985-09-17),
5. 4539957 - Ignition timing control system for internal combustion engines (1985-09-10),
6. 4517944 - Ignition timing control for internal combustion engines (1985-05-21),
7. 4513716 - Ignition timing control system with knock control for internal (1985-04-30),
8. 4498331 - Knocking detecting apparatus for internal combustion engines (1985-02-12),
9. 4489692 - Ignition timing control system for internal combustion engine with knock (1984-12-25),
10. 4480615 - Method and apparatus for controlling ignition timing in a multicylinder (1984-11-06),
11. 4467764 - Method and apparatus for controlling ignition timing in a multicylinder (1984-08-28),
12. 4453521 - Method and apparatus for controlling ignition timing in a multicylinder (1984-06-12),
13. 4452206 - Ignition timing control system for internal combustion engines (1984-06-05),
14. 4452205 - Method and apparatus for controlling ignition timing in an internal (1984-06-05),
15. 4432322 - Method and system for controlling ignition timing in a multicylinder (1984-02-21),

Title: **Toshiharu Iwata: Innovator in Internal Combustion Engine Technology**

Introduction

Toshiharu Iwata is a notable inventor from Aichi, Japan, who has made significant contributions to the field of internal combustion engine technology. With a remarkable portfolio of 32 patents, his innovations have focused on improving engine performance, reducing knocking, and enhancing control systems.

Latest Patents

Among Toshiharu Iwata's latest patents is the "Knock Control System for Internal Combustion Engine." This invention features a knocking vibration detecting unit that integrates with a knock deciding unit. The communication regarding knock intensity is efficiently managed between the knock deciding unit and an engine controlling microcomputer, ensuring ignition timing is adjusted to prevent engine damage. This innovative approach minimizes noise interference and optimizes the size of the electronic control unit (ECU).

Another prominent patent is the "Ignition Timing Controller for Multi-Cylinder Engine." This system dynamically evaluates whether the same cylinder is experiencing knocking over successive engine cycles or if different cylinders are affected. Iwata’s design allows for precise control, permitting ignition timing to be delayed for a single cylinder or all cylinders as needed, ultimately maximizing engine torque while minimizing knocking.

Career Highlights

Iwata has developed his expertise while working with prominent companies in the automotive sector, including Nippondenso Co., Ltd. and Nippon Soken, Inc. Through his career, he has focused on evolving engine control technologies that cater to the needs of modern automotive performance.

Collaborations

Throughout his career, Toshiharu Iwata has collaborated with talented individuals such as Tadashi Hattori and Hiroshi Haraguchi. Their joint efforts have allowed for the advancement of innovative technologies that benefit the automotive industry.

Conclusion

Toshiharu Iwata stands out as a leading inventor in the realm of internal combustion engine technology. With his groundbreaking patents and collaborations, he continues to shape the future of automotive engineering, ensuring efficiency and reliability in engine performance. His work leaves a lasting impact on the industry and inspires future innovations.

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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