B - Operations – Transporting – 63 – H
Patent
B - Operations, Transporting
63
H
B63H 20/24 (2006.01) F01N 13/00 (2010.01) F01N 13/12 (2010.01) F01N 3/28 (2006.01) F01N 3/30 (2006.01) F01N 3/34 (2006.01) F02B 61/04 (2006.01) F02B 75/20 (2006.01)
Patent
CA 2176858
An outboard motor includes an exhaust emission control system which is arranged rationally and neatly in the housing of an outboard motor body, irrespective of various limitations on the outside shape of the housing. An oil pan disposed below an engine of the outboard motor has an oil holding portion, and an exhaust pipe is disposed vertically along a vertical wall portion of the oil holding portion. A catalytic converter is disposed in an intermediate portion of the exhaust pipe in confronted relation to the vertical wall portion. The catalytic converter has a particular shape in horizontal section which is greater in side in a first direction than in a second direction perpendicular to the first direction. A fresh-air delivery passage is provided for introducing fresh air into an exhaust passage disposed upstream of the exhaust pipe. The fresh-air delivery passage is connected at one end to the top plate of an intake box and includes a check valve disposed at an intermediate portion of the fresh-air passage. The check valve is adapted to open only when the pressure in the exhaust passage is less than the atmospheric pressure. The exhaust system is perfectly protected against a possible entry of water, and an engine combustion failure and corrosion of the exhaust system resulting therefrom.
Kawamura Hiroshi
Murata Hiroyuki
Dennison Associates
Honda Giken Kogyo Kabushiki Kaisha
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