JPH0476965U - - Google Patents
Info
- Publication number
- JPH0476965U JPH0476965U JP11883790U JP11883790U JPH0476965U JP H0476965 U JPH0476965 U JP H0476965U JP 11883790 U JP11883790 U JP 11883790U JP 11883790 U JP11883790 U JP 11883790U JP H0476965 U JPH0476965 U JP H0476965U
- Authority
- JP
- Japan
- Prior art keywords
- discharge port
- fuel
- plunger
- discharge
- barrel
- 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 11
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Fuel-Injection Apparatus (AREA)
Description
第１図ないし第４図はこの考案の一実施例を示
すもので、第１図はプランジヤの側面図、第２図
はこの考案の係る分配型燃料噴射ポンプの一部を
省略して示す断面図、第３図は第１図の−矢
視拡大断面図、第４図は各ポートの開放特性とカ
ムリフトとを示す図、第５図、第６図および第７
図はそれぞれこの考案の他の実施例を示す第３図
と同様の断面図、第８図は初期噴射と主噴射とが
行われる場合の噴射率の特性を示す図、第９図は
２ステージカムのリフト特性を示す図である。
３……バレル、３ｂ……吐出ポート、４……プ
ランジヤ、４ｂ……吐出スリツト、７……燃料加
圧室、１１，１３……前平取部（連通路）、１２
，１５……前溝部（連通路）、１４，１６，１７
……連通孔（連通路）。
Figures 1 to 4 show an embodiment of this invention, in which Figure 1 is a side view of the plunger, and Figure 2 is a cross-sectional view of the distribution type fuel injection pump according to this invention, with some parts omitted. 3 is an enlarged sectional view taken in the direction of the - arrow in FIG. 1, FIG. 4 is a diagram showing the opening characteristics of each port and the cam lift, FIGS.
The figures are cross-sectional views similar to Figure 3 showing other embodiments of this invention, Figure 8 is a diagram showing the characteristics of the injection rate when initial injection and main injection are performed, and Figure 9 is a two-stage diagram. FIG. 3 is a diagram showing lift characteristics of a cam. 3...Barrel, 3b...Discharge port, 4...Plunger, 4b...Discharge slit, 7...Fuel pressurization chamber, 11, 13...Front flat part (communication path), 12
, 15... Front groove (communication path), 14, 16, 17
...Communication hole (communication path).
Claims (1)
バレルに回転往復動自在に挿入され、外周面に回
転に伴つて前記吐出ポートに対して連通・遮断す
る吐出スリツトが形成されたプランジヤとを備え
、プランジヤの往動によつて加圧された燃料加圧
室の燃料を前記吐出スリツトおよび前記吐出ポー
トを介して燃料噴射ノズル側へ吐出するようにし
た分配型燃料噴射ポンプにおいて、前記バレルと
前記プランジヤとに、プランジヤの回転に伴つて
連通・遮断し、連通時には前記燃料加圧室と前記
燃料噴射ノズル側とを連通させる連通路を次の(
イ)，(ロ)の条件を満たすようにして形成したこ
とを特徴とする分配型燃料噴射ポンプ。 (イ) 前記連通路は、前記吐出ポートと前記吐出
スリツトとが連通する前で、かつ前記プランジヤ
の往動初期に吐出ポートと吐出スリツトとを連通
させる。 (ロ) 前記連通路は、その流通面積が前記吐出ポ
ートおよび前記吐出スリツトによつて連通せしめ
られる前記燃料加圧室と前記燃料噴射ノズルとの
間の通路の流通面積より小さく設定されている。[Claims for Utility Model Registration] A barrel with a discharge port opening on its inner peripheral surface, and a discharge slit inserted into the barrel so as to be able to rotate and reciprocate, and that communicates with and shuts off the discharge port as it rotates on its outer peripheral surface. and a plunger in which fuel is pressurized by forward movement of the plunger, and the fuel in the fuel pressurizing chamber is discharged to the fuel injection nozzle side through the discharge slit and the discharge port. In the injection pump, a communication passage is provided between the barrel and the plunger, which communicates with each other and shuts off as the plunger rotates, and communicates the fuel pressurizing chamber with the fuel injection nozzle side when communicating.
A distribution type fuel injection pump characterized in that it is formed to satisfy the conditions (a) and (b). (a) The communication path connects the discharge port and the discharge slit before the discharge port and the discharge slit communicate with each other and at the beginning of forward movement of the plunger. (b) The communication passage has a flow area smaller than a flow area of a passage between the fuel pressurizing chamber and the fuel injection nozzle, which are communicated by the discharge port and the discharge slit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11883790U JPH0476965U (en) | 1990-11-15 | 1990-11-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11883790U JPH0476965U (en) | 1990-11-15 | 1990-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0476965U true JPH0476965U (en) | 1992-07-06 |
Family
ID=31866803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11883790U Pending JPH0476965U (en) | 1990-11-15 | 1990-11-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0476965U (en) |
-
1990
- 1990-11-15 JP JP11883790U patent/JPH0476965U/ja active Pending