JPH0479965U - - Google Patents
Info
- Publication number
- JPH0479965U JPH0479965U JP12358590U JP12358590U JPH0479965U JP H0479965 U JPH0479965 U JP H0479965U JP 12358590 U JP12358590 U JP 12358590U JP 12358590 U JP12358590 U JP 12358590U JP H0479965 U JPH0479965 U JP H0479965U
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- plunger
- discharge hole
- groove
- control sleeve
- 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 19
- 238000002347 injection Methods 0.000 claims description 14
- 239000007924 injection Substances 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims 1
Landscapes
- High-Pressure Fuel Injection Pump Control (AREA)
- Fuel-Injection Apparatus (AREA)
Description
第１図は本考案の一実施例によるプリストロー
ク可変機構付き燃料噴射ポンプ１の縦断面図、第
２図は同、パイロツト噴射開始の状態を示す要部
縦断面図、第３図は同、パイロツト噴射終了の状
態を示す要部縦断面図、第４図は同、メイン噴射
開始の状態を示す縦断面図、第５図は同、メイン
噴射終了の状態を示す縦断面図である。
１……燃料噴射ポンプ、２……ポンプ本体、３
……縦孔、４……下部プランジヤバレル、５……
プランジヤ、６……上部プランジヤバレル、７…
…デリバリバルブ、８……燃料圧室、９……燃料
出口、１０……カムシヤフト、１１……カム、１
２……タペツト、１３……スプリング、１４……
ドライビングフエース、１５……噴射量調節用ス
リーブ、１６……突起、１７……噴射量調節用ロ
ツド、１８……制御スリーブ、１９……案内溝、
２０……係合溝、２１……案内ピン、２２……タ
イミングコントロールロツド、２３……タイミン
グコントロールロツド２２の係合部、２４……横
孔、２５……燃料溜り室、２６……燃料吸排孔（
燃料吸入ポート）、２７……制御用傾斜溝（リー
ド）、２８……連通用横孔、２９……連通孔、３
０……メイン噴射用カツトオフポート、３１……
燃料入口、３２……パイロツトスピル用グルーブ
、３３……パイロツト噴射用カツトオフグルーブ
、Ｌ……パイロツト噴射ストローク。
FIG. 1 is a longitudinal cross-sectional view of a fuel injection pump 1 with a variable pre-stroke mechanism according to an embodiment of the present invention, FIG. FIG. 4 is a longitudinal cross-sectional view of the main part showing the state at the end of the pilot injection, FIG. 4 is a longitudinal cross-sectional view showing the state at the start of the main injection, and FIG. 5 is a longitudinal cross-sectional view showing the state at the end of the main injection. 1...Fuel injection pump, 2...Pump body, 3
... Vertical hole, 4 ... Lower plunger barrel, 5 ...
Plunger, 6... Upper plunger barrel, 7...
...Delivery valve, 8...Fuel pressure chamber, 9...Fuel outlet, 10...Camshaft, 11...Cam, 1
2... Tappet, 13... Spring, 14...
Driving face, 15... Sleeve for adjusting injection amount, 16... Protrusion, 17... Rod for adjusting injection amount, 18... Control sleeve, 19... Guide groove,
20... Engagement groove, 21... Guide pin, 22... Timing control rod, 23... Engagement portion of timing control rod 22, 24... Horizontal hole, 25... Fuel reservoir chamber, 26... Fuel intake and exhaust hole (
fuel intake port), 27... control inclined groove (lead), 28... horizontal hole for communication, 29... communication hole, 3
0... Main injection cut-off port, 31...
Fuel inlet, 32... Pilot spill groove, 33... Pilot injection cut-off groove, L... Pilot injection stroke.
Claims (1)
室から燃料吸排孔を介して前記燃料圧室に燃料を
吸い込みこの燃料を圧送するプランジヤと、 このプランジヤに摺動自在に外嵌した制御スリ
ーブとを有するとともに、 この制御スリーブと前記プランジヤとの軸方向
の相対位置を変えてプリストロークを調節するよ
うにした燃料噴射ポンプであつて、 前記プランジヤの前記燃料吸排孔に連通する制
御用傾斜溝をこのプランジヤの外表面に形成する
とともに、この制御用傾斜溝に軸方向において相
対する位置の前記制御スリーブにメイン噴射用カ
ツトオフポートを形成し、かつ 前記プランジヤの前記燃料吸排孔からは離れた
位置の外表面にパイロツトスピル用グルーブを形
成するとともに、前記制御スリーブの内周位置に
このパイロツトスピル用グルーブと前記プランジ
ヤの前記燃料吸排孔とを連通および遮断可能なパ
イロツト噴射用カツトオフグルーブを形成したこ
とを特徴とする燃料噴射ポンプ。[Scope of Claim for Utility Model Registration] A plunger barrel having a fuel pressure chamber, and a plunger that reciprocates within the plunger barrel to suck fuel from the fuel reservoir chamber into the fuel pressure chamber through the fuel intake/discharge hole and pump the fuel. and a control sleeve slidably fitted onto the plunger, and the pre-stroke is adjusted by changing the relative position of the control sleeve and the plunger in the axial direction, the fuel injection pump comprising: A control inclined groove communicating with the fuel intake/discharge hole of the plunger is formed on the outer surface of the plunger, and a main injection cut-off port is formed in the control sleeve at a position facing the control inclined groove in the axial direction. and a pilot spill groove is formed on the outer surface of the plunger at a position away from the fuel suction/discharge hole, and the pilot spill groove and the fuel suction/discharge hole of the plunger are formed on an inner peripheral position of the control sleeve. A fuel injection pump characterized by forming a cut-off groove for pilot injection that can communicate and cut off communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12358590U JPH0479965U (en) | 1990-11-27 | 1990-11-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12358590U JPH0479965U (en) | 1990-11-27 | 1990-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0479965U true JPH0479965U (en) | 1992-07-13 |
Family
ID=31871281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12358590U Pending JPH0479965U (en) | 1990-11-27 | 1990-11-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0479965U (en) |
-
1990
- 1990-11-27 JP JP12358590U patent/JPH0479965U/ja active Pending
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