JPH02103167U - - Google Patents
Info
- Publication number
- JPH02103167U JPH02103167U JP990589U JP990589U JPH02103167U JP H02103167 U JPH02103167 U JP H02103167U JP 990589 U JP990589 U JP 990589U JP 990589 U JP990589 U JP 990589U JP H02103167 U JPH02103167 U JP H02103167U
- Authority
- JP
- Japan
- Prior art keywords
- valve
- damper chamber
- low pressure
- pressure side
- needle valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims 2
- 239000012530 fluid Substances 0.000 claims 1
- 238000013016 damping Methods 0.000 description 4
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図ないし第３図はこの考案の一実施例を示
すもので、第１図はその縦断面図、第２図はダン
ピングバルブを示す拡大断面図、第３図は第２図
の―矢視断面図、第４図はダンピングバルブ
の他の例を示す拡大断面図である。
１…ノズル本体、８…針弁、９…弁座、１０…
噴射孔、１９…セントラルプランジヤ、２０…ダ
ンピングバルブ（弁手段）、２１…ダンピング室
、２２…タンク室、２６ｃ…オリフイス（絞り部
）。
Figures 1 to 3 show one embodiment of this invention, in which Figure 1 is a longitudinal sectional view, Figure 2 is an enlarged sectional view showing the damping valve, and Figure 3 is an arrow shown in Figure 2. FIG. 4 is an enlarged sectional view showing another example of the damping valve. 1... Nozzle body, 8... Needle valve, 9... Valve seat, 10...
Injection hole, 19... Central plunger, 20... Damping valve (valve means), 21... Damping chamber, 22... Tank chamber, 26c... Orifice (throttling part).
Claims (1)
この針弁の開弁移動方向前方に配置され、針弁の
移動に追随して移動するセントラルプランジヤと
、このセントラルプランジヤの針弁と逆側の端部
に臨んで設けられ、内部にセントラルプランジヤ
を針弁側へ押圧する作動流体が充填されたダンパ
室とを備えた燃料噴射ノズルにおいて、前記ダン
パ室を大気圧等の低圧側に接続するとともに、前
記ダンパ室と前記低圧側との間に、弾性部材によ
つて閉弁せしめられて前記ダンパ室と前記低圧側
とを遮断し、前記ダンパ室の圧力が前記弾性部材
のセツト圧を越えると開弁して前記ダンパ室と前
記低圧側とを連通させる弁手段を設け、この弁手
段にその閉弁時に前記ダンパ室と前記低圧側とを
連通させる絞り部を設けたことを特徴とする燃料
噴射ノズル。 A needle valve that moves in the axial direction to open and close the injection hole,
A central plunger is placed in front of the needle valve in the valve opening movement direction and moves following the movement of the needle valve, and a central plunger is provided facing the opposite end of the central plunger from the needle valve and has a central plunger inside. In a fuel injection nozzle equipped with a damper chamber filled with working fluid that presses toward the needle valve side, the damper chamber is connected to a low pressure side such as atmospheric pressure, and between the damper chamber and the low pressure side, The valve is closed by an elastic member to isolate the damper chamber and the low pressure side, and when the pressure in the damper chamber exceeds the set pressure of the elastic member, the valve opens to isolate the damper chamber and the low pressure side. A fuel injection nozzle characterized in that a valve means for communication is provided, and the valve means is provided with a throttle portion for communicating the damper chamber and the low pressure side when the valve is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP990589U JPH02103167U (en) | 1989-02-01 | 1989-02-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP990589U JPH02103167U (en) | 1989-02-01 | 1989-02-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02103167U true JPH02103167U (en) | 1990-08-16 |
Family
ID=31217063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP990589U Pending JPH02103167U (en) | 1989-02-01 | 1989-02-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02103167U (en) |
-
1989
- 1989-02-01 JP JP990589U patent/JPH02103167U/ja active Pending