JPH0480974U

JPH0480974U -

Info

Publication number: JPH0480974U
Application number: JP12238090U
Authority: JP
Priority date: 1990-11-26
Filing date: 1990-11-26
Publication date: 1992-07-14

Description

[Brief explanation of the drawing]

第１図は本考案の第１の形態の一実施例を示す
断面図、第２図は第１図の−線断面図、第３
図および第４図は第１図の−線断面図であり
、それぞれ低温時および高温時の状態を示す。第
５図は本考案の第１の形態にかかるオイルポンプ
の特性を示すグラフ、第６図は本考案の第２の形
態の一実施例を示す断面図、第７図は第６図の
−線断面図、第８図および第９図は第６図の
−線断面図であり、それぞれ低温時および高温
時の状態を示す。第１０図は本考案の第２の形態
にかかるオイルポンプの特性を示すグラフ、第１
１図は従来のオイルポンプの特性を示すグラフで
ある。２……オイル通路、３……（第１）リリーフ通
路、４……第２リリーフ通路、５……リリーフ装
置、１１……段付筒状部材、１１Ｂ……（第１）
リリーフ孔、１１Ｃ……第２リリーフ孔、１２…
…リリーフ弁体、１３……リリーフスプリング、
２１……筒状弁体、２１Ａ……弁孔、２３……バ
イメタル。 FIG. 1 is a cross-sectional view showing an embodiment of the first form of the present invention, FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1, and FIG.
This figure and FIG. 4 are sectional views taken along the line -- in FIG. 1, and show states at low temperature and high temperature, respectively. FIG. 5 is a graph showing the characteristics of the oil pump according to the first embodiment of the present invention, FIG. 6 is a sectional view showing an embodiment of the second embodiment of the present invention, and FIG. The line cross-sectional views, FIGS. 8 and 9 are cross-sectional views taken along the line -- in FIG. 6, and show the states at low temperature and high temperature, respectively. FIG. 10 is a graph showing the characteristics of the oil pump according to the second embodiment of the present invention;
Figure 1 is a graph showing the characteristics of a conventional oil pump. 2... Oil passage, 3... (first) relief passage, 4... Second relief passage, 5... Relief device, 11... Stepped cylindrical member, 11B... (first)
Relief hole, 11C...Second relief hole, 12...
...Relief valve body, 13...Relief spring,
21... Cylindrical valve body, 21A... Valve hole, 23... Bimetal.

Claims

[Claims for Utility Model Registration] 1. A relief valve mechanism that is driven according to the discharge pressure of the pump and is capable of opening a relief passage that relieves oil from the discharge side oil passage; What is claimed is: 1. A relief device for an oil pump, comprising: a temperature driving means; and a regulating valve driven by the temperature sensing driving means to reduce the opening area of the relief passage in accordance with a rise in oil temperature. 2. A relief valve mechanism that is driven according to the discharge pressure of the pump and is capable of sequentially opening first and second relief passages that relieve oil from the discharge side oil passage; and a temperature sensor disposed within the discharge side oil passage. A relief device for an oil pump, comprising: a drive means; and an on-off valve that is driven by the temperature-sensitive drive means and closes the first relief passage in response to a rise in oil temperature.