This inventor holds 2 USPTO granted patents. Top assignees: Nippon Piston Ring Co., Ltd., Nittan Valve Co., Ltd.. Active years: 2019-2023.
Company Filing History:
2 out of 230 
1 out of 89 
Years Active: 2019-2023
Title: Kiyoshi Suwa: Innovator in Internal Combustion Engine Technology
Introduction
Kiyoshi Suwa is a notable inventor based in Tochigi, Japan. He has made significant contributions to the field of internal combustion engine technology, holding 2 patents that showcase his innovative approach to engineering.
Latest Patents
One of his latest patents is an iron-based sintered alloy valve seat for internal combustion engines. This invention provides a valve seat insert that boasts excellent heat dissipation properties and wear resistance. The valve seat insert is designed to be press-fitted into an aluminum alloy cylinder head and is constructed from an iron-based sintered alloy. It features a dual-layer structure, consisting of a functional member side layer and a supporting member side layer, with a copper plating film on the outer peripheral side. The plating film's thickness ranges from 1 to 100 µm, and its hardness is adjusted to be 1.05 to 4.5 times that of the cylinder head in Vickers hardness. Additionally, the valve seat insert is designed to maintain wear resistance while simplifying the manufacturing process. Another patent involves the assembly of a hollow poppet valve and a valve seat insert, which enhances thermal conductivity and reduces valve temperature across the engine's RPM range.
Career Highlights
Throughout his career, Kiyoshi Suwa has worked with prominent companies such as Nippon Piston Ring Co., Ltd. and Nittan Valve Co., Ltd. His experience in these organizations has contributed to his expertise in developing advanced components for internal combustion engines.
Collaborations
Kiyoshi has collaborated with notable individuals in the industry, including Kenichi Sato and Hiroshi Oshige. Their combined efforts have led to advancements in engine technology and improved performance.
Conclusion
Kiyoshi Suwa's innovative contributions to internal combustion engine technology highlight his expertise and dedication to engineering. His patents reflect a commitment to enhancing performance and efficiency in automotive applications.