JPH0465958U - - Google Patents
Info
- Publication number
- JPH0465958U JPH0465958U JP10657790U JP10657790U JPH0465958U JP H0465958 U JPH0465958 U JP H0465958U JP 10657790 U JP10657790 U JP 10657790U JP 10657790 U JP10657790 U JP 10657790U JP H0465958 U JPH0465958 U JP H0465958U
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- pressure
- discharge port
- fuel injection
- inflow port
- 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
- 239000000446 fuel Substances 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図ないし第５図はこの考案の一実施例を示
すもので、第１図はその要部を示す縦断面図、第
２図は三方弁を示す拡大断面図、第３図は第２図
の−矢視拡大断面図、第４図はカムアングル
に対する、プランジヤのリフト量、アウトレツト
ポートの開放期間、カツトオフポートの開放期間
、インレツトポートの開放期間、リターンポート
の開放期間および予圧スリツトの開放期間を示す
図、第５図はカムアングルに対する噴射圧の変化
特性を示す図、第６図はこの考案の他の実施例を
示す縦断面図である。
５……プランジヤ、６……燃料加圧室、９……
三方弁、９１ｂ……流入ポート、９１ｃ……吐出
ポート、９１ｄ……戻しポート、１０……蓄圧室
（蓄圧手段）。
Figures 1 to 5 show one embodiment of this invention, with Figure 1 being a vertical sectional view showing the main parts, Figure 2 being an enlarged sectional view showing the three-way valve, and Figure 3 being the second embodiment of the invention. Figure 4 is an enlarged sectional view taken in the direction of the - arrow in the figure. Figure 4 shows the lift amount of the plunger, the opening period of the outlet port, the opening period of the cut-off port, the opening period of the inlet port, the opening period of the return port, and the preload with respect to the cam angle. FIG. 5 is a diagram showing the change in injection pressure with respect to the cam angle, and FIG. 6 is a longitudinal sectional view showing another embodiment of this invention. 5...Plunger, 6...Fuel pressurization chamber, 9...
Three-way valve, 91b...inflow port, 91c...discharge port, 91d...return port, 10...pressure accumulation chamber (pressure accumulation means).
Claims (1)
内の燃料を加圧するとともに、加圧された燃料を
複数の燃料噴射ノズルに順次圧送するようにした
分配型燃料噴射ポンプにおいて、前記燃料加圧室
と前記燃料噴射ノズルとの間に、前記燃料加圧室
に接続される流入ポート、前記燃料噴射ノズルに
接続される吐出ポート、および流入ポートの圧力
が吐出ポートの圧力より低くなり、その差圧が所
定値以上になると、その差圧によつて開かれて吐
出ポートと連通する戻しポートを有し、流入ポー
トから吐出ポート側へ燃料が流れるのを抵抗なく
許容し、吐出ポート側から流入ポート側へ燃料が
流れるのを抵抗をもつて許容することにより前記
差圧を生じさせる三方弁と、この三方弁の戻しポ
ートに接続されるとともに、前記プランジヤの回
転に伴つて前記複数の燃料噴射ノズルのうちの噴
射中以外の燃料噴射ノズルに順次接続される蓄圧
手段とを設けたことを特徴とする分配型燃料噴射
ポンプ。 In a distribution type fuel injection pump that pressurizes fuel in a fuel pressurizing chamber by a rotating and reciprocating plunger and sequentially pressure-feeds the pressurized fuel to a plurality of fuel injection nozzles, the fuel pressurizing chamber and An inflow port connected to the fuel pressurizing chamber, a discharge port connected to the fuel injection nozzle, and a pressure in the inflow port is lower than the pressure in the discharge port, and a differential pressure therebetween is provided between the fuel injection nozzle and the fuel pressurization chamber. When it exceeds a predetermined value, the pressure difference opens the return port and communicates with the discharge port, allowing fuel to flow from the inflow port to the discharge port side without resistance, and from the discharge port side to the inflow port side. a three-way valve that generates the differential pressure by allowing fuel to flow with resistance to the three-way valve; A distribution type fuel injection pump characterized by being provided with a pressure accumulating means that is sequentially connected to the fuel injection nozzles other than those during injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10657790U JPH0465958U (en) | 1990-10-12 | 1990-10-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10657790U JPH0465958U (en) | 1990-10-12 | 1990-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0465958U true JPH0465958U (en) | 1992-06-09 |
Family
ID=31852717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10657790U Pending JPH0465958U (en) | 1990-10-12 | 1990-10-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0465958U (en) |
-
1990
- 1990-10-12 JP JP10657790U patent/JPH0465958U/ja active Pending
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