JPS5749056A - Fuel injection pump - Google Patents
Fuel injection pumpInfo
- Publication number
- JPS5749056A JPS5749056A JP12370880A JP12370880A JPS5749056A JP S5749056 A JPS5749056 A JP S5749056A JP 12370880 A JP12370880 A JP 12370880A JP 12370880 A JP12370880 A JP 12370880A JP S5749056 A JPS5749056 A JP S5749056A
- Authority
- JP
- Japan
- Prior art keywords
- diameter section
- injection
- plunger
- small
- diameter
- 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.)
- Granted
Links
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
PURPOSE: To reduce an amount of NO generation and improve a thermal efficiency in a Diesel engine by method wherein a small-diameter section is attached on the top of a plunger of a fuel injection pump for the Diesel engine so that a low-pressure initial injection can be ensured by providing a pseudo double-stage injection decreasing an initial injection rate.
CONSTITUTION: A diameter (d) of the top surface of a small-diameter section 41 is set at, for example about 0.75DW0.975D in respect to the maximum outer diameter D of a plunger 4. Its axial length L is set at, for exmaple, about 0.01DW 0.1D. With this structure, an initial injection of fuel is carried out at a low pressure when the small-diameter section 41 slightly catches a fuel supply port 3. Subsequently, main injection is carried out at a high pressure because a large-diameter section of the plunger 4 is closed. Therefore, both reduction of the amount of NO generation and improvement of the thermal efficiency are gained at a time.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12370880A JPS5749056A (en) | 1980-09-06 | 1980-09-06 | Fuel injection pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12370880A JPS5749056A (en) | 1980-09-06 | 1980-09-06 | Fuel injection pump |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5749056A true JPS5749056A (en) | 1982-03-20 |
JPH02546B2 JPH02546B2 (en) | 1990-01-08 |
Family
ID=14867376
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12370880A Granted JPS5749056A (en) | 1980-09-06 | 1980-09-06 | Fuel injection pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5749056A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5420495U (en) * | 1977-07-12 | 1979-02-09 |
-
1980
- 1980-09-06 JP JP12370880A patent/JPS5749056A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5420495U (en) * | 1977-07-12 | 1979-02-09 |
Also Published As
Publication number | Publication date |
---|---|
JPH02546B2 (en) | 1990-01-08 |
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