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For the Inventor, By the Inventor

Yokohama, Japan

Takashi Shirakawa

USPTO Granted Patents = 31


Average Co-Inventor Count = 1.5

ph-index = 13

Forward Citations = 667(Granted Patents)


Location History:

  • Yokosuka, JP (1997 - 2003)
  • Yokohama, JP (1997 - 2009)
  • Kanagawa, JP (2001 - 2009)

Company Filing History:

goldMedal31 out of 13,398 
 
Nissan Motor Company Limited
 patents

Years Active: 1997-2009

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31 patents (USPTO):Explore Patents
1. 7631493 - Exhaust gas purification control of diesel engine (2009-12-15),
2. 7587888 - Engine control apparatus (2009-09-15),
3. 7555895 - Exhaust gas purifying apparatus and method for internal combustion engine (2009-07-07),
4. 7296561 - Engine control apparatus (2007-11-20),
5. 7275363 - Exhaust gas purifying apparatus and method for internal combustion engine (2007-10-02),
6. 7208029 - Exhaust gas cleaning system (2007-04-24),
7. 7162860 - Diagnosis system of exhaust aftertreatment apparatus for internal combustion engine (2007-01-16),
8. 7143740 - Engine fuel injection control device (2006-12-05),
9. 7107770 - Engine control device (2006-09-19),
10. 7107760 - Exhaust gas purifying system for internal combustion engine (2006-09-19),
11. 7043900 - Turbocharged engine control system (2006-05-16),
12. 7040086 - Exhaust emission control system of internal combustion engine (2006-05-09),
13. 7007463 - Engine fuel injection control system (2006-03-07),
14. 6993901 - Excess air factor control of diesel engine (2006-02-07),
15. 6962045 - Exhaust gas apparatus and method for purifying exhaust gas in internal combustion engine (2005-11-08),

Title: Takashi Shirakawa: Innovator in Diesel Engine Technology

Introduction

Takashi Shirakawa is a prominent inventor based in Yokohama, Japan, known for his significant contributions to diesel engine technology. With an impressive portfolio of 31 patents, Shirakawa has dedicated his career to enhancing the efficiency and environmental performance of automotive engines.

Latest Patents

Among his latest innovations are two critical patents related to exhaust gas purification in diesel engines. The first patent focuses on an advanced diesel particulate filter integrated with a NOx trap catalyst. This system effectively traps particulate matter and nitrogen oxides in series within the exhaust passage of a diesel engine. A controller calculates the particulate matter deposition amount and regulates the combustion process to prevent excessive buildup, thereby optimizing the regeneration of the NOx trap catalyst.

The second patent introduces an engine control apparatus designed to manage post-exhaust processes. This innovation prevents surging when transitioning from rich to lean air conditions. It includes a turbo-supercharger powered by exhaust energy, an EGR path for managing exhaust gases, and a control unit that dynamically adjusts the air excess coefficient based on driving conditions for optimal performance.

Career Highlights

Currently, Takashi Shirakawa works at Nissan Motor Company Limited, where he applies his expertise in engine design and emission control technologies. His work is pivotal in helping Nissan develop vehicles that meet increasingly stringent environmental regulations without sacrificing performance.

Collaborations

Throughout his career, Shirakawa has collaborated with other talented professionals, including his coworkers Manabu Miura and Yasuhisa Kitahara. Together, they contribute to innovative projects that push the boundaries of automotive technology.

Conclusion

Takashi Shirakawa's work is instrumental in advancing diesel engine technology, emphasizing environmental sustainability and performance efficiency. His contributions through numerous patents ensure that the automotive industry continues to innovate, paving the way for cleaner and more efficient vehicles.

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