JPS5749056A - Fuel injection pump - Google Patents

Fuel injection pump

Info

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
Application number
JP12370880A
Other languages
Japanese (ja)
Other versions
JPH02546B2 (en
Inventor
Nobuji Eguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hino Motors Ltd
Original Assignee
Hino Motors Ltd
Hino Jidosha Kogyo KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hino Motors Ltd, Hino Jidosha Kogyo KK filed Critical Hino Motors Ltd
Priority to JP12370880A priority Critical patent/JPS5749056A/en
Publication of JPS5749056A publication Critical patent/JPS5749056A/en
Publication of JPH02546B2 publication Critical patent/JPH02546B2/ja
Granted legal-status Critical Current

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
JP12370880A 1980-09-06 1980-09-06 Fuel injection pump Granted JPS5749056A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5420495U (en) * 1977-07-12 1979-02-09

Patent Citations (1)

* Cited by examiner, † Cited by third party
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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