CONTROL DEVICE FOR VARIABLE-DISPLACEMENT OIL PUMP AND CONTROL METHOD THEREFOR

WIPO Patent Application WO/2019/176270

A1

According to the present invention, a diffusion discharge pressure (PLMT) at which a cooling-oil flow of cooling oil injected from an oil jet mechanism (35) spreads out into a diffusion state is set in advance, and a target discharge pressure of a variable-displacement oil pump (54) is adjusted such that a target discharge pressure of cooling oil discharged from the variable-displacement oil pump (54) does not exceed the diffusion discharge pressure (PLMT). In this way, because the discharge pressure of the variable-displacement oil pump (54) is adjusted to the target discharge pressure, at which a phenomenon in which the cooling-oil flow of the cooling oil injected from a nozzle of the oil jet mechanism (35) is diffused and spread out does not occur, it is possible to supply a sufficient amount of cooling oil to the inside of a cooling channel and to suppress a reduction in piston cooling efficiency.

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JP6916065	Internal combustion engine
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SAGA KOJI (JP)
SHISHIDO KEITAROU (JP)
NAGAMI TAKUYA (JP)

PCT/JP2019/001171

September 19, 2019

January 17, 2019

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HITACHI AUTOMOTIVE SYSTEMS LTD (JP)

F01M1/08; F01M1/16; F01P3/10; F02D45/00; F02F3/22

WO2010143252A1

2010-12-16

KR20090057574A	2009-06-08
JP2011163194A	2011-08-25
JP2014159760A	2014-09-04
JP2017198085A	2017-11-02
JP2009209835A	2009-09-17

KOBAYASHI, Hiromichi et al. (JP)

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