Title:
多気筒エンジンの吸排気装置
Document Type and Number:
Japanese Patent JP5870488
Kind Code:
B2
Abstract:
A multi-cylinder engine intake and exhaust having a plurality of independent exhaust passages each connected to an exhaust port in a respective one of a plurality of cylinders, a collecting pipe connected to downstream ends of the plurality of independent exhaust passages, and a volume-enlarged portion provided downstream with respect to the collecting pipe. Each of at least a downstream portion of each of the plurality of independent exhaust passages and at least an upstream portion of the collecting pipe is formed such that a cross-sectional area thereof gradually decreases toward a downstream direction. The volume-enlarged portion is formed such that a cross-sectional area thereof is relatively increased so as to cause a positive pressure wave of exhaust gas reaching the volume-enlarged portion to be reflected and converted to a negative pressure wave.
Inventors:
Takamasa Matsumoto
Fujii Mikiko
Fujii Mikiko
Application Number:
JP2011009758A
Publication Date:
March 01, 2016
Filing Date:
January 20, 2011
Export Citation:
Assignee:
Mazda Corporation Inc
International Classes:
F02D13/02; F02B27/04
Domestic Patent References:
| JP11022499A | ||||
| JP2010084532A | ||||
| JP2004211614A | ||||
| JP2000314322A | ||||
| JP6500380A |
Foreign References:
| WO2010092678A1 |
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Ko Sato
Masataka Otani
Ko Sato