Company Filing History:
16 out of 36,499 
1 out of 1,138 
1 out of 1,600 Years Active: 1985-2002
Title: Innovations by Kouhei Igarashi
Introduction
Kouhei Igarashi is a notable inventor based in Susono, Japan. He has made significant contributions to the field of exhaust gas purification, holding a total of 16 patents. His work focuses on improving engine efficiency and reducing harmful emissions.
Latest Patents
One of his latest patents is an exhaust gas purification device for an engine. This device utilizes two NO absorbents to effectively remove NO from the exhaust gas of an engine operating at a lean air-fuel ratio. The NO absorbents are arranged in series within the exhaust passage, and a nozzle for supplying a reducing agent is strategically placed between them. The device features switching valves that change the direction of the exhaust gas flow, allowing for alternating absorption and release of NO. This innovative approach ensures continuous removal of NO while preventing saturation of the absorbents.
Another significant patent is a method and device for purifying exhaust gas of an engine. In this system, an exhaust manifold is connected to a three-way catalyst, which in turn connects to an NH adsorbing and oxidizing catalyst. The engine alternates between lean and rich operations, allowing for the conversion of NO to NH in the catalyst. This process enhances the efficiency of exhaust gas purification.
Career Highlights
Kouhei Igarashi has worked with prominent companies in the automotive industry, including Toyota Motor Corporation and Toyota Central R&D Labs. His experience in these organizations has contributed to his expertise in developing innovative solutions for engine emissions.
Collaborations
He has collaborated with notable colleagues such as Yukio Kinugasa and Takaaki Itou, further enhancing the impact of his inventions in the field.
Conclusion
Kouhei Igarashi's contributions to exhaust gas purification technology demonstrate his commitment to innovation and environmental sustainability. His patents reflect a deep understanding of engine operations and a dedication to reducing emissions.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.