Location History:
- Kariya, JP (2006)
- Toyota, JP (2006)
Company Filing History:
4 out of 1,625 
3 out of 105 Years Active: 2006
Title: Tetsushi Nagira: Innovator in Engine Technology
Introduction
Tetsushi Nagira is a notable inventor based in Toyota, Japan, recognized for his contributions to engine technology. With a total of four patents to his name, he has made significant advancements in the design and functionality of internal combustion engines.
Latest Patents
One of Nagira's latest patents is a cylinder head structure designed to improve engine efficiency. The bottom surface of the cylinder head is formed by an intake-side bottom surface and an exhaust-side bottom surface, each featuring respective intake and exhaust ports. This innovative design includes a first wall between the intake-side water jacket and the intake-side bottom surface, which is thicker than the second wall between the exhaust-side water jacket and the exhaust-side bottom surface. This structure effectively reduces the amount of hydrocarbons (HC) present in exhaust gas.
Another significant patent is a valve gear for an internal combustion engine. This valve gear allows for the prompt switching of the position of a piston in a rocker arm, enabling changes in engine operating conditions with a satisfactory response, even in low rotation regions where oil discharge from the pump may be inadequate. The design incorporates low-speed and high-speed cylinder portions, allowing for selective operation of rocker arms based on the positions of the pistons.
Career Highlights
Throughout his career, Tetsushi Nagira has worked with prominent companies in the automotive industry, including Mitsubishi Motors Corporation and Mitsubishi Automotive Engineering Company. His experience in these organizations has contributed to his expertise in engine design and innovation.
Collaborations
Nagira has collaborated with notable coworkers such as Toshihiko Oka and Satoshi Ando, further enhancing his work in the field of engine technology.
Conclusion
Tetsushi Nagira's innovative patents and career achievements highlight his significant role in advancing engine technology. His work continues to influence the automotive industry and improve engine performance.