An exhaust control device of a multi-cylinder engine

Japanese Patent JP5919743

B2

PROBLEM TO BE SOLVED: To provide an exhaust control device of a multi-cylinder engine, the device capable of sufficiently exhibiting an ejector effect with simple constitution.SOLUTION: The exhaust control device has a plurality of independent exhaust channels connected exhaust ports of one cylinder or of a plurality of cylinders in which exhaust order is not continuous and a mixing pipe 54 including a collecting part 54d in which a downstream side in an exhaust circulation direction is gradually reduced in a diameter. The exhaust control device is introduced into the upstream side part of the mixing pipe 54 with downstream ends A of the respective independent exhaust channels bundled. Parts facing the inner peripheral surface of the mixing pipe 54 of the wall parts defining the downstream ends A of the respective independent discharge channels are eliminated. The downstream ends A of the respective independent exhaust channels and the collecting part 54d overlap in the exhaust circulation direction. A moving means moving at least one of the independent exhaust channels and the mixing pipe 54 in the exhaust circulation direction is arranged such that the overlapping quantity L changes.

Shuhei Tsujita

JP2011248722A

May 18, 2016

November 14, 2011

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Mazda Corporation Inc

F02B27/06; F01N13/10; F02D13/02

JP7508081A
JP4036023A
JP2011214402A
JP2001140640A
JP57086515A
JP63021318A
JP1103726U
JP3064623A
JP8334020A
JP2000027642A

US20030136120
US20080229735

Etsushi Kotani
Masataka Otani
Ko Sato

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