Title:
Exhaust system for multi-cylinder engine
Document Type and Number:
Japanese Patent JP6361638
Kind Code:
B2
Abstract:
Provided is an exhaust device connected to an engine body. The exhaust device includes a plurality of independent exhaust pipes, each of which has a circular cross section, and which are connected to exhaust ports of cylinders of the engine body; and a mixing pipe having a circular cross section, connected to downstream ends of the independent exhaust pipes, and through which exhaust gas that has passed through the independent exhaust pipes flows in. The independent exhaust pipes are connected to an upstream end of the mixing pipe in such a manner that parts of internal spaces of the circular cross sections overlap each other in a predetermined section from the downstream ends of the independent exhaust pipes toward upstream, and a ratio of overlapping portions of the circular cross sections gradually increases from upstream toward downstream.
Inventors:
Shiro Kato
Tatsuya Koga
Sumi Shinji
Haruna Yanagida
Murao Norio
Tatsuya Koga
Sumi Shinji
Haruna Yanagida
Murao Norio
Application Number:
JP2015229584A
Publication Date:
July 25, 2018
Filing Date:
November 25, 2015
Export Citation:
Assignee:
Mazda Corporation Inc
International Classes:
F02B27/04; F01N13/10
Domestic Patent References:
| JP61160512A | ||||
| JP60046248B1 | ||||
| JP2013032753A | ||||
| JP9296724A |
Foreign References:
| US6647714 | ||||
| US20110154812 |
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Tsutomu Fukunari
Masataka Otani
Tsutomu Fukunari
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