OIL CIRCUIT RELIEF DEVICE FOR ENGINE

PURPOSE: To provide an oil circuit relief device for an engine including a hydraulic relief valve and a temperature sensitive relief valve, capable of executing oil relief (discharge) with the aiming pressure of oil regardless of whether the temperature of the oil is high or low, and simplifying its...

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Bibliographic Details
Main Authors WATANABE TAKATOSHI, MIYAJIMA JUNICHI, KATO YUYA, KOSUGI YASUHIRO
Format Patent
LanguageEnglish
Japanese
Published 18.02.2016
Subjects
BLASTING
HEATING
LIGHTING
MECHANICAL ENGINEERING
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS
ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS
WEAPONS
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Summary:PURPOSE: To provide an oil circuit relief device for an engine including a hydraulic relief valve and a temperature sensitive relief valve, capable of executing oil relief (discharge) with the aiming pressure of oil regardless of whether the temperature of the oil is high or low, and simplifying its configuration.BACKGROUND ART:CONSTITUTION: An oil circuit relief valve includes an upstream flow path 61 provided ranging from an oil pump 9 to an engine E, a hydraulic relief valve A having a valve element 1 for opening a first small relief outflow part 341 and a first large relief outflow part 342 in sequence to perform oil relief, and a temperature sensitive relief valve B having a second relief inflow part 51 and a second relief outflow part 52. In the upstream flow path 61, the hydraulic relief valve A and the temperature sensitive relief valve B are arranged in parallel to each other. A small opening area Qa of the first small relief outflow part 341 is smaller than a medium opening area Qb of the second relief outflow part 52, and a large opening area Qc of the first large relief outflow part 342 is larger than the medium opening area Qb of the second relief outflow part 52.SELECTED DRAWING: Figure 10 【目的】油圧リリーフバルブと感温リリーフバルブとを具備し、オイルの温度の高低にかかわらず、狙ったオイルの圧力でのオイルリリーフ（排出）の実行を可能とし、且つその構成を簡単にできるエンジンのオイル回路のリリーフ装置とすること。【背景技術】【構成】オイルポンプ９からエンジンＥまで設けられた上流流路６１と、弁体１により第１小リリーフ流出部３４１，第１大リリーフ流出部３４２の順番で開きオイルのリリーフを行う油圧リリーフバルブＡと、第２リリーフ流入部５１と第２リリーフ流出部５２とを有する感温リリーフバルブＢとを具備すること。上流流路６１には油圧リリーフバルブＡと感温リリーフバルブＢとが並列に配置され、第１小リリーフ流出部３４１の小開口面積Ｑａは第２リリーフ流出部５２の中開口面積Ｑｂよりも小さく、第１大リリーフ流出部３４２の大開口面積Ｑｃは第２リリーフ流出部５２の中開口面積Ｑｂよりも大きいこと。【選択図】 図１０
Bibliography:Application Number: JP20150121532