VEHICLE AND V-TYPE MULTI-CYLINDER FOUR-STROKE ENGINE UNIT

WIPO Patent Application WO/2016/002956

A1

The objective of the present invention is to provide a vehicle that is equipped with a V-type multi-cylinder four-stroke engine unit with which the detection accuracy of oxygen concentration in exhaust gas can be further improved. According to the present invention, a front main catalyst (39F) for a single combustion chamber is provided inside a front exhaust channel portion (36F) for a single combustion chamber between a front upstream bent portion (34cF) and a collection portion (33a). In an exhaust channel from one front combustion chamber (29F) to an emission port (35e), the front main catalyst (39F) for a single combustion chamber purifies, to the greatest extent, exhaust gas discharged from the one front combustion chamber (29F). A front upstream oxygen detection member (37FF) for a single combustion chamber is disposed further upstream in the flow direction of the exhaust gas than the front main catalyst (39F) for a single combustion chamber. The invention is provided with a rear main catalyst (39Re) for a single combustion chamber and a rear upstream oxygen detection member (37ReF) for a single combustion chamber that are configured in the same way.

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

PCT/JP2015/069355

January 07, 2016

July 03, 2015

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YAMAHA MOTOR CO LTD (JP)

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

JP2005220766A	2005-08-18
JP2003314263A	2003-11-06
JP2008064110A	2008-03-21
JP2000356128A	2000-12-26
JP2006097606A	2006-04-13

KAJI, SUHARA & ASSOCIATES (JP)
特許業務法人梶 and the Suhara patent firm (JP)

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