Mazda Motor Corporation

Tetsunori Hada

Masanori Honda

Eiji Murasawa

Tomohito Okuyama

Takashi Sasaki

Yuki Kodama

Keisuke Yamakawa

Naoko Yorozu

Takao Maruko

Akihiro Nishikawa

Yuji Okazaki

Yuki Nakatani

A vehicle-body bottom portion comprises a noise-insulation inferior part and a noise-insulation superior part provided adjacently to a periphery of the noise-insulation inferior part. Between the vehicle-body bottom portion and a floor carpet are provided a sound-absorbing member which is arranged between the noise-insulation inferior part and the floor carpet, a cross member which connects the noise-insulation superior part and the floor carpet and seals a gap between the vehicle-body bottom portion and the floor carpet, and a noise insulation space which is adjacent to the sound-absorbing member and the cross member and enclosed by the sound-absorbing member and the cross member.

Noise insulation structure of automotive vehicle

A floor carpet is placed on a floor panel forming a cabin floor surface. The floor carpet comprises a skin layer which is configured to block an airflow therethrough and a sound-absorption layer which is made of a sound-absorption material and configured to allow an airflow therein, the sound-absorption layer being provided below the skin layer to contact the floor panel at a lower face thereof. A space between the skin layer and the floor panel (a space portion where the sound-absorption layer is arranged) is sealed with a seal member which is configured to surround the sound-absorption layer. The seal member is pressed against the floor panel (tightly) by a pressing member which is fixed to a vehicle-body side with a fixing tool.

Noise insulation structure of cabin floor

There are provided a center pillar, a roof side rail connected to an upper end portion of the center pillar and having a closed cross section extending in a vehicle longitudinal direction, and a synthetic resin-made reinforcing member provided inside the roof side rail at a position near an upper end portion of the center pillar. The roof side rail comprises a roof rail inner having a protrusion portion and a roof rail outer forming the closed cross section together with the roof rail inner. The reinforcing member is provided to have a gap from the roof rail outer and integrally joined to an outward face, in a vehicle width direction, of the roof rail inner which is roughened by an anchor effect.

Upper vehicle-body structure of vehicle

Growing community of inventors

Hiroshima, Japan

Tetsunori Hada