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Title:
OIL PUMP AND ENGINE COOLING CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/077927
Kind Code:
A1
Abstract:
This oil pump (20) is provided in a main flow passage (11) for circulating oil (Oi) from an oil pan (Op), in which the oil (Oi) is held, to an engine (En), and constitutes part of the main flow passage (11). The oil pump (20) has, provided to a housing (30): a first hydraulic valve (50) for releasing the oil (Oi) from the main flow passage (11) when oil pressure is higher than a predetermined value; a thermo valve (60) capable of releasing the oil (Oi) from the main flow passage (11) when oil temperature is lower than a predetermined value; and a second hydraulic valve (70) provided downstream of the thermo valve (60) and releasing the oil (Oi) from the main flow passage (11) at substantially the same oil pressure as that at which the first hydraulic valve (50) releases the oil (Oi).

Inventors:
MIYAJIMA, Junichi (2757, Hirosawa-cho 1-chome, Kiryu-sh, Gunma 85, 〒3768585, JP)
Application Number:
JP2018/034578
Publication Date:
April 25, 2019
Filing Date:
September 19, 2018
Export Citation:
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Assignee:
YAMADA MANUFACTURING CO., LTD. (2757, Hirosawa-cho 1-chome Kiryu-sh, Gunma 85, 〒3768585, JP)
International Classes:
F04C15/06; F01M1/02; F01M1/16
Foreign References:
JP2016027257A2016-02-18
JPH06123211A1994-05-06
JP2016027258A2016-02-18
JP2017186927A2017-10-12
US4680446A1987-07-14
JPH0223276U1990-02-15
Attorney, Agent or Firm:
SHIMODA, Yo-ichiro et al. (Rikohtosho Bldg, 27-2 Ichibancho, Chiyoda-k, Tokyo 82, 〒1020082, JP)
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