JPS5822456U - Fuel pump discharge pressure pulsation absorber - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は一般的な燃料ポンプの一部切欠き立面図、第２
図は同じく気体ダンパの装着状態を示す一部切欠き斜視
図、第３図は同じ〈従来の気体ダンパの一部切欠き斜視
眸第４図はこの考案の一実施例を示す一部切欠き斜視図
である。 １・・・燃料ポンプ本体、２・・・吸入口、３・・・吐
出口、４・・・気体ダンパ、５・・・薄膜弾性体、５ａ
・・・膨出部、６・・・フィルム、７・・・気体室、７
ａ・・・凹部。Figure 1 is a partially cutaway elevation view of a typical fuel pump, Figure 2
Figure 3 is a partially cutaway perspective view showing the installed state of the gas damper, Figure 3 is the same (partially cutaway perspective view of a conventional gas damper), and Figure 4 is a partially cutaway perspective view showing an embodiment of this invention. FIG. DESCRIPTION OF SYMBOLS 1...Fuel pump main body, 2...Suction port, 3...Discharge port, 4...Gas damper, 5...Thin film elastic body, 5a
...Bulging part, 6... Film, 7... Gas chamber, 7
a... Concavity.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 燃料ポンプ内の燃料流路に遊嵌状態で内装される気体ダ
ンパからなり、この気体ダンパが有機材料からなる薄膜
弾性体の膨出部によって形成される気体室を備えるもの
において、前記気体室内に内圧増加時に内容積増加方向
へ反転する凹部を設けたことを特徴とする燃料ポンプの
吐出圧脈動吸収装置。A gas damper is installed in a fuel flow path in a fuel pump in a loosely fitted state, and the gas damper includes a gas chamber formed by a bulging portion of a thin film elastic body made of an organic material. A discharge pressure pulsation absorbing device for a fuel pump, characterized in that a concave portion is provided that reverses in the direction of increasing internal volume when internal pressure increases.