Location History:
- Aichi pref., JP (1997)
- Nagoya, JP (1998)
Company Filing History:
Years Active: 1997-1998
Title: Tomohiro Sawada: Innovator in Internal Combustion Engine Technology
Introduction
Tomohiro Sawada is a notable inventor based in Aichi-pref., 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
His latest patents include a method of making a piston unit for an internal combustion engine. This method incorporates the steps of pinching a melting core in a mold cavity of a piston mold. The melting core includes an inner ring that forms a ring-shaped passage within a piston body, an outer ring, and a plurality of coupling portions connecting the inner and outer rings. The process further involves pouring molten metallic alloy into the cavity and solidifying it, removing the outer ring of the melting core, filling the space left by its removal with reinforced material, and then melting the inner ring and coupling portions of the melting core.
Another significant patent is the piston unit of an internal combustion engine. This piston unit is designed to prevent interfacial cracks between the piston and a wear-proof ring. It also allows for T6 treatment to the aluminum base alloy used for the piston. The piston is formed of aluminum base alloy, and the wear-proof ring is fused with the first ring groove of the piston. The wear-proof ring is made of copper-zinc alloy, with its thermal expansion coefficient ranging from 19.5 × 10⁻⁶ m/m to 22.0 × 10⁻⁶ m/m. The copper-zinc alloy may contain 63 wt. % of copper, 30 wt. % of zinc, 15 wt. % of aluminum, and 4% of titanium, or it may consist of 70 wt. % of copper and 30% of zinc only.
Career Highlights
Tomohiro Sawada is currently employed at Aisin Seiki Kabushiki Kaisha, where he continues to develop innovative solutions for internal combustion engines. His work has significantly impacted the efficiency and reliability of engine components.
Collaborations
He collaborates with talented coworkers, including Hiromi Niimi and Yasuhiro Kawabata, who contribute to his projects and enhance the innovation process.
Conclusion
Tomohiro Sawada's contributions to internal combustion engine technology through his patents demonstrate his