Engine for outboard motor

Patent metadata

Field	Value
Publication number	US-9982594-B2
Application number	US-201615226068-A
Country	US
Kind code	B2
Filing date	Aug 2, 2016
Priority date	Aug 10, 2015
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

An intake system is arranged in a side portion of one side of an engine body in a left-right direction, and the exhaust passage and the air pump are arranged in a side portion of the other side of the cylinder block and the cylinder head of the engine body in the left-right direction.

First claim

What is claimed is:

1. An engine for an outboard motor comprising:
an in-line multiple-cylinder engine body provided with a crankshaft having an axial line directed to a vertical direction, a cylinder block comprising a plurality of vertically overlapping cylinders, the cylinders having axial lines directed backward in a horizontal direction, and a cylinder head disposed on the cylinder block;
an intake system configured to supply combustion air to the engine body;
an exhaust passage formed to connect the engine body and middle and lower units thereunder;
an air pump of a secondary air supply system configured to supply secondary air to the exhaust passage; and
an air inlet configured to supply the secondary air to the air pump,
wherein an intake system is arranged in one side of the engine body in a left-right direction,
wherein the exhaust passage and the air pump are arranged in a side of the cylinder block and the cylinder head of the engine body opposite to the intake system in the left-right direction, and
wherein the air inlet is arranged in a side of a crankcase of the engine body opposite to the intake system in the left-right direction.

2. The engine for the outboard motor according to claim 1 , further comprising a starter motor arranged in the side of the crankcase of the engine body opposite to the intake system in the left-right direction,
wherein the air pump of the secondary air supply system is arranged in a side of the cylinder block between the starter motor and the exhaust passage.

3. The engine for the outboard motor according to claim 1 , wherein the air pump is connected to a crankshaft of the engine through a power transmission device and is driven by power of the engine.

4. The engine for the outboard motor according to claim 3 , wherein the power transmission device has a clutch mechanism capable of controlling transmission of a driving force.

Assignees

• Suzuki Motor Corp

Inventors

• Shomura Nobuyuki
• Hamada Ryuji
• Miyaki Tomohiko
• Hayashi Toshio

Classifications

• F02B61/045 Primary

  for marine engines · CPC title

• F01N3/326

  Engine-driven air pumps · CPC title

• F01N2590/021

  for outboard engines · CPC title

• F01N13/18

  Construction facilitating manufacture, assembly, or disassembly · CPC title

• B63H20/24

  Arrangements, apparatus and methods for handling exhaust gas in outboard drives, e.g.} exhaust gas outlets {(in engines, e.g. outboard marine engines, F01N) · CPC title