VEHICLE AND SINGLE-CYLINDER FOUR-STROKE ENGINE UNIT

Title:

VEHICLE AND SINGLE-CYLINDER FOUR-STROKE ENGINE UNIT

Document Type and Number:

WIPO Patent Application WO/2016/002962

Kind Code:

A1

Abstract:

The objective of the present invention is to provide a vehicle that is equipped with a single-cylinder four-stroke engine unit with which oxygen concentration in an exhaust gas can be more stably detected. According to the present invention, at least a portion of a main catalyst (39) for a single combustion chamber is positioned further to the front than a crank axis (Cr1), and in an exhaust channel from one combustion chamber (29) to an emission port (35e), the main catalyst (39) for a single combustion chamber purifies, to the greatest extent, the exhaust gas discharged from the one combustion chamber (29). The main catalyst (39) for a single combustion chamber is disposed between an upstream bent portion (34c) and downstream bent portion (34e) of an exhaust pipe (34) for a single combustion chamber. An upstream oxygen detection member (37) for a single combustion chamber is disposed further upstream in the flow direction of the exhaust gas than the main catalyst (39) for a single combustion chamber.

Inventors:

NISHIGAKI MASATO (JP)
ARAKI YUUJI (JP)
ISHIZAWA KAZUHIRO (JP)
WAKIMURA MAKOTO (JP)

Application Number:

PCT/JP2015/069361

Publication Date:

January 07, 2016

Filing Date:

July 03, 2015

Export Citation:

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Assignee:

YAMAHA MOTOR CO LTD (JP)

International Classes:

F01N3/00; F01N3/28; F01N13/00; F01N13/08; F02D35/00

Domestic Patent References:

WO2011111156A1

2011-09-15

Foreign References:

JP2007187004A	2007-07-26
JP2006152962A	2006-06-15
JP2002530181A	2002-09-17
JP2013173498A	2013-09-05
JP2011052605A	2011-03-17
JP2006250129A	2006-09-21
JP2008223641A	2008-09-25
JP2014137001A	2014-07-28

Other References: