Title:
オイルポンプにおける圧力制御装置
Document Type and Number:
Japanese Patent JP4521005
Kind Code:
B2
Abstract:
An oil pump pressure control device is configured from a first discharge passage (11) to an engine (E), a first return passage (12) that returns to an intake side of an outer circumferential side rotor, a second discharge passage (13) to the engine, a second return passage (14) that returns to an intake side of an inner circumferential side rotor, and a pressure control valve (C) whose valve main body is provided between a discharge port from the inner circumferential side rotor and the first discharge passage. The first (11) and second discharge passage (14) are coupled, and a flow passage control is executed in each of: a low revolution range in a state in which only the first and the second discharge passage are open; an intermediate revolution range in a state in which the first and second discharge passage are open and a first intake side of the return passage is closed while a second intake side of the return passage is open; and a high revolution range in a state in which the second discharge passage is closed while the first discharge passage and the return passage are open.
Inventors:
Keiichi Kai
Kenichi Fujiki
Yasunori Ono
Kenichi Fujiki
Yasunori Ono
Application Number:
JP2007039135A
Publication Date:
August 11, 2010
Filing Date:
February 20, 2007
Export Citation:
Assignee:
Yamada Manufacturing Co., Ltd.
International Classes:
F04C11/00; F04C14/00; F04C15/06
Domestic Patent References:
| JP2005140022A | ||||
| JP11280666A |
Foreign References:
| EP0811765A2 | ||||
| US4658583 |
Attorney, Agent or Firm:
Kunio Iwahori