Toyota Jidosha Kabushiki Kaisha

Minoru Uchiyama

Takashi Suzuki

Takashi Koyama

Yuzuru Shiratori

Naoki Tsuneishi

Yuuichiro Wada

A piston ring includes a plurality of first ring pieces placed inside the ring groove in a stacking manner such that the first ring pieces adhere to each other in the axis direction. The first ring pieces include respective piston ring gap portions each having end surfaces separated from each other in the circumferential direction of the first ring pieces such that the end surfaces face each other via a ring gap having a predetermined dimension. The respective piston ring gap portions of the first ring pieces are displaced from each other in the circumferential direction. A closing member is provided to close the piston ring gap portions of the first ring pieces in the radial direction of the first ring pieces.

Growing community of inventors

Okaya, Japan

Minoru Uchiyama