Mazda Motor Corporation

Mazda Motor Corporat Ion

Seiji Nakano

Takeshi Nakamura

Yoshikazu Nishimura

Ryuji Nonaka

Tomoya Yoshida

Takashi Sasaki

Hiroaki Ishizu

Keisuke Yamakawa

Kohji Hashida

Masanori Ishikawa

Shuhei Narita

Masashi Notomi

Katsumi Shiraishi

Yasunari Futamura

Kazumi Shimizu

Kosuke Kojima

Shintaro Shinbo

Jumpei Kawamoto

Junko Nitta

Tsuyoshi Kondo

In order to increase road noise transmission loss, a double-wall panel includes a core material. The core material is enclosed between an outer wall and an inner wall facing each other, and has at least a predetermined thickness across the panel in all in-plane directions of the walls. The core material has a specific surface area of 20,000 (mm/cm) or more, where the specific surface area is defined as a surface area per unit volume.

Automotive panel structure

Disclosed herein is an damping structure including a vibration energy damping member absorbing, from a vibration energy path member, at least part of noise vibration energy transmitted through the vibration energy path member, wherein a length of the vibration energy damping member is equal to or more than a half of a wavelength of the vibration of the vibration energy path member, and at least one attachment part attaching the vibration energy damping member to the vibration energy path member is disposed in a position corresponding to an antinode of the vibration of the vibration energy path member.

Noise vibration energy damping structure in vehicle

A load transmission portion which projects toward a roof rail outer panel is provided at a position between the roof rail outer panel and a roof rail inner panel which is located substantially at the same longitudinal-position as an upper end of a pillar outer panel. Accordingly, a center pillar can be properly restrained from coming into a vehicle compartment, restraining any improper increase of the number of components.

Side vehicle-body structure of vehicle

Provided is a vehicle upper structure which is capable of increasing, in a simple manner, a section modulus (resistive force) against a bending moment to be imposed on a roof reinforcement by a swinging phenomenon of a gusset occurring when a side impact load input into a center pillar and a roof side rail member is applied to the roof reinforcement from the gusset during a vehicle side impact event, to allow the load to be effectively dispersed to the roof reinforcement. The vehicle upper structure comprises a roof side rail member, a roof reinforcementand a gusset, wherein an end of the gusseton a side fastened to the roof reinforcementhas a shape which inclines with respect to a line Loriented in a vehicle front-rear direction, in top plan view.

Vehicle upper structure

Growing community of inventors

Higashihiroshima, Japan

Seiji Nakano