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Title:
OUTBOARD ENGINE
Document Type and Number:
Japanese Patent JP2016160836
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an outboard engine capable of preventing reduction in output of an engine and a fuel consumption due to increasing in exhaust resistance.SOLUTION: An outboard engine 6 includes an exhaust passage 22 for discharging exhaust gas generated at V-type engine 7 from an exhaust port 21 into water. The exhaust passage 22 includes first branch passages 66 and second branch passages 64 connected to a plurality of cylinders 31 and arranged inside a V-line; a first upstream collective passage 67 connected to each of the first branch passages 66; a second upstream collective passage 65 connected to each of the second branch passages 64; and a downstream collective passage 68 connected to the first upstream collective passage 67 and the second upstream collective passage 65. A portion ranging from an upstream end 68u of the downstream collective passage 68 to a downstream end 68d of the downstream collective passage 68 is arranged outside cylinder heads 37.SELECTED DRAWING: Figure 6

Inventors:
NAKAYAMA KOICHI
NOSE YUKINORI
Application Number:
JP2015040508A
Publication Date:
September 05, 2016
Filing Date:
March 02, 2015
Export Citation:
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Assignee:
YAMAHA MOTOR CO LTD
International Classes:
F01N13/10; B63H20/24; B63H20/28; F01N3/24; F01N13/12; F02B67/00; F02B75/22
Domestic Patent References:
JP2014163286A2014-09-08
JP2013108356A2013-06-06
Attorney, Agent or Firm:
Inaoka cultivation
Mio Kawasaki
Masahide Yasuda