US2482733A - Fuel injection pump - Google Patents

Fuel injection pump Download PDF

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Publication number
US2482733A
US2482733A US759561A US75956147A US2482733A US 2482733 A US2482733 A US 2482733A US 759561 A US759561 A US 759561A US 75956147 A US75956147 A US 75956147A US 2482733 A US2482733 A US 2482733A
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United States
Prior art keywords
plunger
pump
chamber
fuel injection
lever
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Expired - Lifetime
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US759561A
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Johansson Martin Leonard
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INJECTOR Co AB
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INJECTOR Co AB
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    • 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
    • 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
    • F02M59/28—Mechanisms therefor
    • 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
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/13—Special devices for making an explosive mixture; Fuel pumps
    • F02M2700/1317—Fuel pumpo for internal combustion engines
    • F02M2700/1388—Fuel pump with control of the piston relative to a fixed cylinder

Definitions

  • the present invention relates to a fuel injection pump for internal combustion engines and having a plunger which is rotatableabout its longitudinal axis and carries a lever which, upon being actuated, rotates the plunger to regulate the quantity of liquid fuel injected by each plunger stroke, said plunger being operated by means of a reciprocable tappet' and being accommodated in a plunger housing having two chambers, of which the one chamber, vcalled the plunger chamber, accommodates the outer end of the plunger and the other, called the cam shaft chamber, accommodates a cam shaft or the like reciprocating the tappet which chambers are separated by a partition having a through-going bore guiding the tappet.
  • Such pumps having a lever on their plunger, have generally been made with a divided pump casing to enable the mounting of the plunger.
  • Fig. 1 is a transverse vertical section through a pump embodying the invention.
  • Fig. 2 is a fragmentary cross section of the pump casing taken on the line 2-2 of Fig. 1.
  • the pump casin-g I is made in one piece.
  • the cam shaft 2 is provided with a cam 5, which imparts to the tappet 6 the axial reciprocating movement thereof.
  • the tappet is accommodated in the bore 22 in the partition 23 above which there is the plunger chamber 24 and below which there is the cam shaft chamber 25.
  • 'I'he tappet actuates in turn the plunger 1 which runs in a plunger barrel ⁇ 8.
  • BarrelI 8 and housing 9 are held seated in the casing I by the pressure from nipple II acting through the packing I2.
  • the nipple II at its upper end is connected to a delivery conduit not shown on the drawing and leading to an injection nozzle of the engine.
  • the regulation as to the quantity of fuel takes place in known manner by rotating the plunger which is provided with, a control portion I3 having an oblique control edge. Said control portion covers an overflow or relief port Il as long as the injection ltakes place. Through rotation, of the plunger the axial length of the control portion is varied in relation to the overflow port I4 whereby different eiicient lengths of the delivery stroke and thus different delivered quantities of fuel are obtained.
  • the rotation of the piston takes place in known manner by actuating a lever I5 force-fitted on to the plunger 1.
  • a vertical portion I6 of the lever I5 runs through a slot in a catching arm I1 rigidly mounted on a control rod I8. The latter is accommodated in the casing so as tobe displaceable axially therein.
  • a lever I5 as illustrated because the lever will require considerably less force for its shifting and greater tolerances will be allowable in the manufacture.
  • Hitherto known pumps provided with a con ⁇ trol lever have a divided pump housing in order to facilitate the mounting of the plunger. This complication hasbeen avoided according to the present invention by providing an axial slot I9 in the partition of the pump housing laterally of the bore for the tappet.
  • the barrel 8 is first lowered from the upper end of the pump casing whereupon the spring 20 and the washer 26 are introduced from below from the cam shaft chamber 25 and then the plunger 1 with its lever I5 are inserted.
  • the slot I9 is so dimensioned that the lever passes freely therethrough when the plunger is lifted axially through the barrel 8. It is not feasible to mount the plunger in another manner, for instance, by turning it inwardly obliquely through a door 2
  • the slot renders possible easy assembly and at the same time enables the pumphousing to be made in asimple and compact manner.
  • a fuel injection pump of the plunger type comprising an integral one piece housing providing a plunger chamber and a cam shaft chamber,
  • said chambers being separated by a partition forming a part of said housing, a reciprocable plunger located in said housing with its outer end in the plunger chamber, said plunger being rotatable about its longitudinal axis to control the amount of fuel delivered by the pump and having a laterally extending control element associated therewith adapted to engage a control member in the plunger chamber for turning the plunger, a tappet located in a bore through said partition for moving said plunger, and a cam shaft located in the cam shaft chamber and having a cam for actuating said tappet, said partition having a laterally extending recess communicating with said bore, whereby to permit said plunger and associated control element to be assembled in operative position in said plunger chamber by being passed ⁇ through said partition from the cam shaft chamber.
  • ananas extending arm and said recess is in the form of a laterally extending slot to accommodate the passage of said arm.

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

Description

sept. 2o, 1949.`
M. L. JoHANssoN FUEL INJEcTloN PUMP Filed July 8, 1947 F/G. E.
Patented Sept. 20, 1949 FUEL INJECTION PUMP Martin Leonard Johansson, Enskede, Sweden, asslgnor to Injector Company Aktiebolag, Stockholm,A Sweden, a corporation of Sweden Application July s, 1947, serial No. 759,561
In sweden July 13, 1946 3 Claims. (Cl. 103-41) The present invention relates to a fuel injection pump for internal combustion engines and having a plunger which is rotatableabout its longitudinal axis and carries a lever which, upon being actuated, rotates the plunger to regulate the quantity of liquid fuel injected by each plunger stroke, said plunger being operated by means of a reciprocable tappet' and being accommodated in a plunger housing having two chambers, of which the one chamber, vcalled the plunger chamber, accommodates the outer end of the plunger and the other, called the cam shaft chamber, accommodates a cam shaft or the like reciprocating the tappet which chambers are separated by a partition having a through-going bore guiding the tappet.
Such pumps, having a lever on their plunger, have generally been made with a divided pump casing to enable the mounting of the plunger. This involves, however, a complication and the present invention has for its object to bring about a simplification in this respect and consists substantially therein that the pump casing is undivided and made in one piece and that the bore is provided with a longitudinal slot adaptedto allow the plunger with its lever to be brought through the cam shaft chamber to the plunger chamber in mounting the pump.
The invention will be described more in detail vwith reference to the accompanying drawings illustrative of the invention and in which:
Fig. 1 is a transverse vertical section through a pump embodying the invention; and
Fig. 2 is a fragmentary cross section of the pump casing taken on the line 2-2 of Fig. 1.
As will be seen from the figures the pump casin-g I is made in one piece. The cam shaft 2 is provided with a cam 5, which imparts to the tappet 6 the axial reciprocating movement thereof. The tappet is accommodated in the bore 22 in the partition 23 above which there is the plunger chamber 24 and below which there is the cam shaft chamber 25. 'I'he tappet actuates in turn the plunger 1 which runs in a plunger barrel` 8. Above the plunger barrel there is provided a valve housing!) having a delivery valve- I which is held down in closed position by means of a compression spring mounted in a nipple II. BarrelI 8 and housing 9 are held seated in the casing I by the pressure from nipple II acting through the packing I2. The nipple II at its upper end is connected to a delivery conduit not shown on the drawing and leading to an injection nozzle of the engine.
The regulation as to the quantity of fuel takes place in known manner by rotating the plunger which is provided with, a control portion I3 having an oblique control edge. Said control portion covers an overflow or relief port Il as long as the injection ltakes place. Through rotation, of the plunger the axial length of the control portion is varied in relation to the overflow port I4 whereby different eiicient lengths of the delivery stroke and thus different delivered quantities of fuel are obtained.
The rotation of the piston takes place in known manner by actuating a lever I5 force-fitted on to the plunger 1. A vertical portion I6 of the lever I5 runs through a slot in a catching arm I1 rigidly mounted on a control rod I8. The latter is accommodated in the casing so as tobe displaceable axially therein. As 4compared with the known control device having a tooth segment engaging a control rack, it is more advantageous to use a lever I5 as illustrated because the lever will require considerably less force for its shifting and greater tolerances will be allowable in the manufacture.
Hitherto known pumps provided with a con` trol lever have a divided pump housing in order to facilitate the mounting of the plunger. This complication hasbeen avoided according to the present invention by providing an axial slot I9 in the partition of the pump housing laterally of the bore for the tappet.
In mounting, the barrel 8 is first lowered from the upper end of the pump casing whereupon the spring 20 and the washer 26 are introduced from below from the cam shaft chamber 25 and then the plunger 1 with its lever I5 are inserted. The slot I9 is so dimensioned that the lever passes freely therethrough when the plunger is lifted axially through the barrel 8. It is not feasible to mount the plunger in another manner, for instance, by turning it inwardly obliquely through a door 2|, provided the barrel is removed, because the spring 20 is so still' and long that considerable risk is run of damaging one or more of the parts.
The slot renders possible easy assembly and at the same time enables the pumphousing to be made in asimple and compact manner.
Obviously numerous variations in the design of the different specific elements of the pump may be made without departing from the principles of the invention, the scope of which is to be understood as embracing all apparatus falling within the purview of the appended claims.
` What is claimed:
1. A fuel injection pump of the plunger type comprising an integral one piece housing providing a plunger chamber and a cam shaft chamber,
3 said chambers being separated by a partition forming a part of said housing, a reciprocable plunger located in said housing with its outer end in the plunger chamber, said plunger being rotatable about its longitudinal axis to control the amount of fuel delivered by the pump and having a laterally extending control element associated therewith adapted to engage a control member in the plunger chamber for turning the plunger, a tappet located in a bore through said partition for moving said plunger, and a cam shaft located in the cam shaft chamber and having a cam for actuating said tappet, said partition having a laterally extending recess communicating with said bore, whereby to permit said plunger and associated control element to be assembled in operative position in said plunger chamber by being passed `through said partition from the cam shaft chamber.
2. A pump as set forth in claim 1, in which said control element is in the form of a laterally,
ananas extending arm and said recess is in the form of a laterally extending slot to accommodate the passage of said arm.
3. A pump as set forth in claim 2, in which the outer end of said arm is provided with an actuating portion substantially parallel with the plunger and said control member comprises an axially movable part engaging the actuating portion of the arm. y
MARTIN LEONARD J OHANSSON REFERENCES CITED The following references are of record in the
US759561A 1946-07-13 1947-07-08 Fuel injection pump Expired - Lifetime US2482733A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729168A (en) * 1949-07-04 1956-01-03 Kloeckner Humboldt Deutz Ag Fuel injection pump
US3972655A (en) * 1973-08-16 1976-08-03 Nissan Motor Co., Ltd. Pump plunger rotating device for plunger-type fuel injection
US4527962A (en) * 1983-11-04 1985-07-09 Robert Bosch Gmbh Multi-cylinder fuel injection pump for internal combustion engines
US20050106032A1 (en) * 2003-09-19 2005-05-19 Mccann Edward D. Apparatus for transporting a quantity of lost circulation material and methods of making and using same
US20070029752A1 (en) * 2004-09-17 2007-02-08 Mccann Edward D Apparatus for transporting drilling fluid additives and methods of making and using same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1289716A (en) * 1918-06-17 1918-12-31 William L Kann Fuel-pump for internal-combustion engines.
US1706785A (en) * 1926-02-26 1929-03-26 Junkers Hugo Fuel pump
US1854009A (en) * 1930-11-07 1932-04-12 Napier & Son Ltd Liquid fuel injection pump for internal combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1289716A (en) * 1918-06-17 1918-12-31 William L Kann Fuel-pump for internal-combustion engines.
US1706785A (en) * 1926-02-26 1929-03-26 Junkers Hugo Fuel pump
US1854009A (en) * 1930-11-07 1932-04-12 Napier & Son Ltd Liquid fuel injection pump for internal combustion engines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2729168A (en) * 1949-07-04 1956-01-03 Kloeckner Humboldt Deutz Ag Fuel injection pump
US3972655A (en) * 1973-08-16 1976-08-03 Nissan Motor Co., Ltd. Pump plunger rotating device for plunger-type fuel injection
US4527962A (en) * 1983-11-04 1985-07-09 Robert Bosch Gmbh Multi-cylinder fuel injection pump for internal combustion engines
US20050106032A1 (en) * 2003-09-19 2005-05-19 Mccann Edward D. Apparatus for transporting a quantity of lost circulation material and methods of making and using same
US20070196198A1 (en) * 2003-09-19 2007-08-23 Mccann Edward D Apparatus for transporting a quantity of lost circulation material and methods of making and using same
US20070029752A1 (en) * 2004-09-17 2007-02-08 Mccann Edward D Apparatus for transporting drilling fluid additives and methods of making and using same

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