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For the Inventor, By the Inventor

Inazawa, Japan

Keiji Wakahara

This inventor holds 39 USPTO granted patents, primarily in Internal Combustion Engine. Top assignee: Denso Corporation. Active years: 1998-2010.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Wakahara. Retrieved from https://idiyas.com/inventor/keiji-wakahara

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

USPTO Granted Patents = 39

% Patents Active = 71.8

Average Co-Inventor Count = 2.2

ph-index = 12

Forward Citations = 443(Granted Patents)


Location History:

  • Nagoya, JP (2000)
  • Kariya, JP (1998 - 2008)
  • Inazawa, JP (2003 - 2010)
  • Kairya, JP (2010)

Company Filing History:

goldMedal39 out of 20,436 
 
Denso Corporation
 patents

Years Active: 1998-2010

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Areas of Expertise:
Fuel Vapor Control
Cooling System Diagnostics
Air-Fuel Ratio Management
Emission Control
Leak Check
Malfunction Detection
Thermostat System
Vehicle Anomaly Diagnosis
Misfire Detection
Engine Control Apparatus
Evaporated Gas Purge
Valve Timing Control
39 patents (USPTO):Explore Patents
1. RE41823 - Leak check for fuel vapor purge system (2010-10-18),
2. 7797924 - Abnormality diagnosis apparatus for secondary air supply system of engine (2010-09-21),
3. RE41660 - Fuel vapor control system with leak check (2010-09-13),
4. 7757649 - Controller, cooling system abnormality diagnosis device and block heater determination device of internal combustion engine (2010-07-20),
5. 7743651 - Method for detecting malfunction of a cooling system based on detected coolant temperature (2010-06-29),
6. 7483781 - Engine control apparatus (2009-01-27),
7. 7409284 - Apparatus for estimating air-fuel ratios and apparatus for controlling air-fuel ratios of individual cylinders in internal combustion engine (2008-08-05),
8. 7397148 - Vehicular anomaly diagnosis system (2008-07-08),
9. 7363804 - Method for detecting malfunction of a cooling system based on detected coolant temperature (2008-04-29),
10. 7356985 - Air-fuel ratio controller for internal combustion engine (2008-04-15),
11. 7316223 - Device for detecting malfunction in evaporated gas purging system (2008-01-08),
12. 7260928 - Diagnostic device for secondary air supply system (2007-08-28),
13. 7168399 - Abnormality diagnosis apparatus and engine cooling system having the same (2007-01-30),
14. 7146851 - Diagnostic apparatus for variable valve control system (2006-12-12),
15. 7140241 - Leak-check apparatus of fuel-vapor-processing system, fuel-temperature estimation apparatus and fuel-temperature-sensor diagnosis apparatus (2006-11-28),

**Title: Innovator Keiji Wakahara and His Contributions to Automotive Technology**

Introduction

Keiji Wakahara, a prominent inventor based in Inazawa, Japan, has made significant strides in automotive technology with an impressive portfolio of 39 patents. His inventions aim to enhance the efficiency and reliability of internal combustion engines and related systems, contributing to advancements in the automotive industry.

Latest Patents

Among his latest innovations are two noteworthy patents:

1. **Leak Check for Fuel Vapor Purge System**: This invention involves a leak check system that executes a leak check processing by closing canister and purge valves. The system monitors pressure changes in the fuel vapor purge system, effectively detecting abnormalities caused by deformations in the fuel tank while avoiding erroneous leak detections.

2. **Abnormality Diagnosis Apparatus for Secondary Air Supply System of Engine**: This patent introduces an advanced apparatus to diagnose abnormalities within the secondary air supply system of internal combustion engines. It includes an air pump for supplying secondary air, a detecting means for gathering relevant information, and a diagnosis means that evaluates the secondary air supply system’s performance based on temperature information and other diagnostic criteria.

Career Highlights

Keiji Wakahara's career has been marked by his contributions to Denso Corporation, a leading global supplier of advanced automotive technology. His work has not only strengthened the company's reputation but has also propelled it to the forefront of innovation in vehicle technology.

Collaborations

Throughout his career, Wakahara has collaborated with notable colleagues such as Akira Ichikawa and Makoto Miwa. These collaborative efforts have enriched his work and contributed to the generation of cutting-edge solutions in automotive systems.

Conclusion

Keiji Wakahara is a testament to the impact of innovative engineering in the automotive field. With his 39 patents and ongoing advancements, he continues to pave the way for future innovations, helping to create more efficient and reliable automotive technologies.

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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