JPS55101761A - Fuel ejection pump - Google Patents

Fuel ejection pump

Info

Publication number
JPS55101761A
JPS55101761A JP721579A JP721579A JPS55101761A JP S55101761 A JPS55101761 A JP S55101761A JP 721579 A JP721579 A JP 721579A JP 721579 A JP721579 A JP 721579A JP S55101761 A JPS55101761 A JP S55101761A
Authority
JP
Japan
Prior art keywords
plunger
oil supply
diameter
small
discharge holes
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
JP721579A
Other languages
Japanese (ja)
Other versions
JPS608343B2 (en
Inventor
Tatsuo Takaishi
Mataji Tateishi
Etsuo Kunimoto
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP54007215A priority Critical patent/JPS608343B2/en
Publication of JPS55101761A publication Critical patent/JPS55101761A/en
Publication of JPS608343B2 publication Critical patent/JPS608343B2/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • F02M59/265—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders characterised by the arrangement or form of spill port of spill contour on the piston

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

PURPOSE: To prevent the sharp drop in the amount of fuel ejection in the low speed and low load region by providing two sets of oil supply and discharge holes of different sizes, providing two leads for the plunger, and using the large or small oil supply and discharge holes corresponding to the low or high load region.
CONSTITUTION: Oil supply hole 5 to be provided for plunger barrel 7 consists of small-diameter and large-diameter oil supply holes 5a and 5b. The upper edges of 5a and 5b are placed at the same height. In a similar manner, plunger barrel 7 is provided with oil discharge hole 8, consisting of small-diameter and large-diameter oil discharge holes 8a and 8b. Plunger 6, which is caused to make reciprocating motion by fuel cam 1 inside barrel 7 and at the same time, which is caused to rotate by fuel ejection control rack 4 is provided with plunger leads 14a and 14b having a large and a small inclination corresponding to oil discharge holes 8a and 8b. Further, oil supply and discharge hole control lands 15 projects at the upper part of plunger 6. By this, the desired purposes are accomplished effectively.
COPYRIGHT: (C)1980,JPO&Japio
JP54007215A 1979-01-26 1979-01-26 fuel injection pump Expired JPS608343B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54007215A JPS608343B2 (en) 1979-01-26 1979-01-26 fuel injection pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54007215A JPS608343B2 (en) 1979-01-26 1979-01-26 fuel injection pump

Publications (2)

Publication Number Publication Date
JPS55101761A true JPS55101761A (en) 1980-08-04
JPS608343B2 JPS608343B2 (en) 1985-03-02

Family

ID=11659768

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54007215A Expired JPS608343B2 (en) 1979-01-26 1979-01-26 fuel injection pump

Country Status (1)

Country Link
JP (1) JPS608343B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665373A1 (en) * 1993-12-28 1995-08-02 Zexel Corporation Fuel injection pump

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0218872U (en) * 1988-07-22 1990-02-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665373A1 (en) * 1993-12-28 1995-08-02 Zexel Corporation Fuel injection pump

Also Published As

Publication number Publication date
JPS608343B2 (en) 1985-03-02

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