JPS5720551A - Fuel injector in internal combustion engine - Google Patents
Fuel injector in internal combustion engineInfo
- Publication number
- JPS5720551A JPS5720551A JP9572880A JP9572880A JPS5720551A JP S5720551 A JPS5720551 A JP S5720551A JP 9572880 A JP9572880 A JP 9572880A JP 9572880 A JP9572880 A JP 9572880A JP S5720551 A JPS5720551 A JP S5720551A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- fuel
- pressure
- oil
- 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
Abstract
PURPOSE: To improve intermission of injection in such a way that spring force is increased after opening a fuel valve and a needle valve by utilizing oil pressure in the fuel pump in order to quicken terminating injection as high valve opening pressure.
CONSTITUTION: Pressured oil in the fuel pump 100 is branched by an injection tube 8, and led to a controlling oil path 200, and it is led through a check valve 201 equipped with a small hole 5 to open its port toward the outside, and a throttle hole 209 to the upper part hydraulic chamber 210 of a piston 111 which compresses a fuel valve spring 13. On another hand, a needle valve 11 to receive oil pressure in the oil sump 901 which s branched through a fuel oil path 10 opens the valve just as before due to the delay through the throttle hole 209, and even if pressure in the fuel pump 100 decreases, and the needle valve 11 commences closing, since oil pressure in the hydraulic chamber 201 remains high the effect of the throttle hole 209, a fuel valve spring 13 to press the needle valve 11 can be relatively strongly compressed. Then after the needle valve 11 has been closed, the small hole 205 is opened, pressure in the upper part hydraulic chamber 210 is decreased, and the spring 13 is returned to its original position.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9572880A JPS5720551A (en) | 1980-07-15 | 1980-07-15 | Fuel injector in internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9572880A JPS5720551A (en) | 1980-07-15 | 1980-07-15 | Fuel injector in internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5720551A true JPS5720551A (en) | 1982-02-03 |
Family
ID=14145528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9572880A Pending JPS5720551A (en) | 1980-07-15 | 1980-07-15 | Fuel injector in internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5720551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03199664A (en) * | 1989-12-28 | 1991-08-30 | Toyota Motor Corp | Fuel injection valve of internal combustion engine |
-
1980
- 1980-07-15 JP JP9572880A patent/JPS5720551A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03199664A (en) * | 1989-12-28 | 1991-08-30 | Toyota Motor Corp | Fuel injection valve of internal combustion engine |
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