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

WIPO Patent Application WO/2016/002961

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 an exhaust gas can be further improved. According to the present invention, in an exhaust channel from one front combustion chamber (29F) to an emission port (35e), a 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 channel length from the one front combustion chamber (29F) to the front upstream oxygen detection member (37FF) for a single combustion chamber is longer than the channel length from the front upstream oxygen detection member (37FF) for a single combustion chamber to an upstream end of 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/JP2015/069360

January 07, 2016

July 03, 2015

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YAMAHA MOTOR CO LTD (JP)

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

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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