Mazda Motor Corporation

Kazuhiro Nakamura

Takuya Yamada

Fusatoshi Tanaka

Taketoshi Yamauchi

Jiro Kato

Tomoaki Fujiyama

Ryo Yamamoto

Hirofumi Shinohara

Yoshihiro Hamazume

Shouichi Aiga

Takashi Yoshikawa

Yoko Inami

Kazuki Onishi

Kosuke Miyamoto

An intake device of an engine comprises an intercooler, an intake passage including a downstream-side intake passage, and an EGR passage recirculating exhaust gas to the downstream-side intake passage. An intake-air supply opening having an opening area smaller than an area of a downstream-side face of an intercooler core is provided at a downstream side wall of a chamber. The downstream-side intake passage includes an extension passage portion extending upwardly along the downstream side wall. The intake-air supply opening includes an upper edge portion which separates the intake air flowing from an inside wall face of the extension passage portion and forms flowing main streams of the intake air inside the extension passage portion. EGR introduction ports are arranged at positions capable of supplying the EGR gas toward the flowing main streams.

Intake device of engine

An air intake apparatus of a multi-cylinder engine includes an intake air inlet passage, an intake air distribution portion, a plurality of independent intake air passages, and a secondary gas inlet passage. The intake air inlet passage has one end portion attached to a throttle valve, and the other end connected to an intake air distribution portion. The intake air distribution portion has a space therein. The secondary gas inlet passage is connected at a part spaced apart, in the intake air inlet passage, from the throttle valve. The intake air distribution portion has a reflux passage which is a passage that connects the space and a part between the one end portion and the other end in the intake air inlet passage. The reflux passage is a passage which refluxes fresh air and secondary gas introduced from the intake air inlet passage to the intake air inlet passage.

Air intake apparatus of multi-cylinder engine having secondary gas inlet passage connected to intake air inlet passage

Growing community of inventors

Aki-gun, Japan

Kazuhiro Nakamura