WATER JACKET STRUCTURE FOR CYLINDER HEAD

WIPO Patent Application WO/2017/068730

A1

According to the present invention, a plurality of connecting portions (13g, 13h) that connect a lower water jacket (15) and upper water jacket (16) formed inside a cylinder head (13) are further downstream than an exhaust collection portion (28) in the flow direction of cooling water, and a volume expansion portion (15b) is provided in the vicinity of the connecting portion (13g) that is closest to the exhaust collection portion (28), and thus the stagnation of cooling water in the vicinity of said connecting portion (13g) is resolved by the volume expansion portion (15b), and the flow rate of the cooling water that flows through a channel upstream of said connecting portion (13g) is prevented from decreasing, thereby making it possible to make the flow rate of the cooling water that flows through each part of the lower water jacket (15) uniform and increase cooling performance. In particular, although the cooling water channel becomes narrow in the vicinity of the exhaust collection portion (28) and cooling performance deteriorates, because the volume expansion portion (15b) is further downstream than the exhaust collection portion (28), the cooling water can pass smoothly through the vicinity of the exhaust collection portion (28) and cooling performance is improved.

JP5130825	Internal combustion engine cylinder head
JP2000240505	CYLINDER HEAD

VAN GERVEN JOHN (NL)
BEYKIRCH RUDIGER (DE)
ASARI MASARU (JP)

PCT/JP2015/080041

April 27, 2017

October 23, 2015

Click for automatic bibliography generation  

HONDA MOTOR CO LTD (JP)
FEV GMBH (DE)

F02F1/36; F01P3/02

JP2014145284A	2014-08-14
JP2012189076A	2012-10-04
JP2014084739A	2014-05-12
JP2005188351A	2005-07-14
JP2014084737A	2014-05-12

OCHIAI & CO. (JP)

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