Mazda Motor Corporation

Hiroki Shimoji

Keishi Kitabatake

Toshiaki Kamo

Ryo Yamamoto

Tsukasa Hoshino

Haruna Yanagida

Hirokazu Hasegawa

Kenji Ushijima

Yoshitaka Nakamura

Daisuke Watanabe

Koji Endo

Yasushi Nakatani

Yasushi Kusunoki

Masami Negami

An exhaust purification device of a multi-cylinder engine which improves exhaust gas purification performance by substantially uniforming a flow rate of exhaust gas throughout a treatment carrier such as a catalyst and improving dispersibility of the exhaust gas from the multi-cylinder engine to the catalyst and other components in the exhaust purification device wherein two collecting pipes are arranged at substantially symmetric positions across a partition plate part, which has a linear cross sectional shape, and is arranged centrally between the pipes which are each formed into D-shaped cross sectional shapes and comprise a first straight line part, a pair of second straight line parts connected with respective ends of a first straight line part and arranged to be substantially parallel with each other, and a circular arc part that connects ends of a pair of second straight line parts on opposite sides of the first straight line part.

Exhaust device of multi-cylinder engine

An exhaust upstream section () of an exhaust apparatus (E) comprises a plurality of branch pipe portions (), a plurality of intermediate collector pipe portions (), a final collector pipe portion (), and an exhaust gas-purifying unit (). The exhaust gas-purifying unit () is disposed on a vehicle-rear side of an engine () to allow a gas passage thereinside to extend approximately in vehicle-widthwise direction, in top plan view. Each of the plurality of intermediate collector pipe portions () curves to allow an exhaust downstream region of the intermediate collector pipe portion () to be oriented toward one side or the other side of the vehicle-widthwise direction, in top plan view, and the final collector pipe portion () curves to allow an exhaust downstream region of the final collector pipe portion () to be oriented toward a vehicle-front side, in top plan view.

Exhaust apparatus for transverse engine

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Hatsukaichi, Japan

Hiroki Shimoji