Title:
高圧燃料供給ポンプ
Document Type and Number:
Japanese Patent JP6681487
Kind Code:
B2
Abstract:
To enable installation of valve seats of a relief valve and a discharge valve in a single passage which connects a compression chamber with a high-pressure passage.SOLUTION: A single valve seat member common to a discharge valve and a relief valve is provided between a compression chamber and a high-pressure passage. A valve seat of the relief valve is provided on a compression chamber side of the valve seat member, and a valve seat of the discharge valve is provided on a high-pressure passage side of the valve seat member. The other end of a relief passage, whose one end is opened to the valve seat of the relief valve, is connected with the high-pressure passage, and the other end of a discharge passage, whose one end is opened to the valve seat of the discharge valve, is connected with the compression chamber. A relief valve mechanism is provided on a compression chamber side of the valve seat of the relief valve, and a discharge valve mechanism is installed on a valve seat downstream side of the discharge valve. According to this constitution, the valve seats of the relief valve and the discharge valve can be constituted of the single valve seat member, and workability and assemblability of the discharge valve and the relief valve are improved comprehensively.SELECTED DRAWING: Figure 2
Inventors:
Junji Saito
Application Number:
JP2019021137A
Publication Date:
April 15, 2020
Filing Date:
February 08, 2019
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
F02M59/46; F02M37/00
Domestic Patent References:
| JP56041157U | ||||
| JP49094021U | ||||
| JP6159195A | ||||
| JP2009257197A | ||||
| JP54030124U | ||||
| JP4105964U | ||||
| JP53099131A | ||||
| JP2009058088A | ||||
| JP6040537U |
Attorney, Agent or Firm:
Yuji Toda