Mazda Motor Corporation

Kouichi Nakano

Takashi Ikai

Yoshiyuki Koga

Kazuo Ichikawa

Osamu Aoki

Yukio Nakamura

Shiro Nakatani

Shinichi Fujimaki

Yasuyuki Andou

Disclosed is an engine piston structure including an outer peripheral portion () formed along an outer shape of a piston (), and having a predetermined thickness, a pair of piston pin supporters () having peripheral walls () having a predetermined thickness, and couplers () each coupling the pair of the piston pin supporters () to the outer peripheral portion (). The outer peripheral portion () and the peripheral walls () of the piston pin supporters () are solid. Each of the coupler () is porous. The outer peripheral portion (), the piston pin supporters (), and the couplers () are made of a metal material and are integrally formed together.

Piston structure for engine

An object of the present invention is to, while forming a heat insulating layer on a squish area surface of a top surface of a piston main body, prevent generation of large cracks on the heat insulating layer and suppress damages and peeling of the heat insulating layer. To achieve this object, in the present invention, pressure is applied to a heat insulating layer provided on a top surface of a piston main body, that is, a pressing stress is applied to the heat insulating layer in advance.

Method of producing piston for engine

Disclosed is a rear-seat occupant protection apparatus, which is designed to protect, during a frontal collision of a vehicle, a rear-seat occupant (B) seated in a rear seat () located behind a front seat () equipped with a seat belt () having a load limiter function. The rear-seat occupant protection apparatus comprises a collision detection device () adapted to detect the frontal collision of the vehicle, and a seat-back displacing mechanism adapted, when the frontal collision of the vehicle is detected by the collision detection device, to permit a seat back () of the front seat () to be displaced frontwardly at a given timing consecutive with a frontward displacement of a front-seat occupant (A) seated in the front seat (). The rear-seat occupant protection apparatus of the present invention can adequately protect a head of the rear-seat occupant during the frontal collision of the vehicle.

Rear-seat occupant protection apparatus

Growing community of inventors

Hiroshima, Japan

Kouichi Nakano