US3712761A - Liquid fuel injection pumping apparatus - Google Patents

Liquid fuel injection pumping apparatus Download PDF

Info

Publication number
US3712761A
US3712761A US00077687A US3712761DA US3712761A US 3712761 A US3712761 A US 3712761A US 00077687 A US00077687 A US 00077687A US 3712761D A US3712761D A US 3712761DA US 3712761 A US3712761 A US 3712761A
Authority
US
United States
Prior art keywords
movement
fuel
bore
shuttle
cylinder
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.)
Expired - Lifetime
Application number
US00077687A
Other languages
English (en)
Inventor
D Mowbray
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.)
CAV Ltd
Original Assignee
CAV 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 CAV Ltd filed Critical CAV Ltd
Application granted granted Critical
Publication of US3712761A publication Critical patent/US3712761A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/14—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons
    • 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
    • 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
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/14—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons
    • F02M2041/1438—Arrangements or details pertaining to the devices classified in F02M41/14 and subgroups
    • F02M2041/1455—Shuttles per se, or shuttles associated with throttle valve for metering fuel admitted to the pumping chamber
    • 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

Definitions

  • ABSTRACT A liquid fuel pumping apparatus including an axially movable shuttle, the extent of movement of which is limited by fluid pressure operable piston member having a cylindrical portion which is eccentrically disposed relative to the axis of the bore containing the piston member, the surface of the cylindrical portion defining a stop surface for the shuttle.
  • This invention relates to liquid fuel pumping apparatus for supplying fuel to internal combustion engines and of the kind comprising a shuttle movable in a bore and adjustable stop means positioned at one end of the bore for limiting the excursion of said shuttle.
  • the object of the invention is to provide such a pumping apparatus in a simple and convenient form.
  • a liquid fuel pumping apparatus of the kind specified comprises in combination, an axially movable member disposed for movement along an axis disposed substantially at right angles to the axis of the bore, a cylindrical portion of said member being eccentrically disposed relative to the axis of movement of the member, and the cylindrical portion having a contoured stop surface against which the shuttle bears, the arrangement being that axial movement and angular movement of the member or both will vary the permitted excursion of the shuttle in the bore.
  • F [G 1 is a sectional side elevation of one example of a pumping apparatus in accordance with the invention.
  • FIG. 2 is a part section on the line 2-2 of FIG. 1.
  • a body part in which is mounted a rotary cylindrical distributor 11. This is arranged to be driven in timed relationship with the engine with which the apparatus is associated and at one end is provided with a transverse bore which accommodates a pair of plungers 12. The portion of the bore lying between the plungers communicates by way of a longitudinal passage in the distributor with a radial delivery passage 13 also formed in the distributor and this is arranged to communicate in turn and as the distributor rotates, with a plurality of outlet ports 14 formed in the body part and in communication respectively with injection nozzles mounted in known manner on the associated compression ignition engine.
  • the plungers 12 are arranged to be moved inwardly as the distributor rotates, by means of cam followers 40 which co-act with cam surfaces formed on a surrounding annular cam ring 41.
  • the cam ring, followers and plungers constitute an injection pump which partakes of an injection stroke so that fuel is expelled from the bore containing the plungers 12 during the time the delivery passage 13 is in register with an outlet port 14.
  • the longitudinal passage communicates with a plurality of radial inlet passages 15 and these are arranged to register in turn as the distributor rotates, with an inlet port formed in the body part and in communication with one end of a cylinder 16 containing an axially movable cylindrical shuttle 17.
  • the aforesaid registration of the inlet port and an inlet passage 15 takes place during a filling period of the injection pump during the time when the plungers 12 are allowed to move outwardly and whilst the delivery passage I3 is out of register with a delivery port 14.
  • Fuel is supplied to said one end of the cylinder 16 by way of a plurality of longitudinal grooves 18 formed in the periphery of the distributor and extending from a circumferential groove 19.
  • the registration of one of the grooves 18 with a supply passage 20 occurs during an injection stroke of the injection pump so that fuel which is delivered to the groove 19 from an outlet 21 of a feed pump 22, by way of a throttle flows to the inner end of the cylinder 16 and causes the shuttle 17 to be moved outwardly.
  • Fuel leaves the other end of the cylinder 16 by way of a passage 23 in the bodypart.
  • This passage is in communication with a further circumferential groove 24 formed in the periphery of the distributor and from this groove 24 extend further axial grooves 25 and these during the movement of the shuttle towards the other end of the cylinder, communicate with spill passages 260.
  • one of the grooves 25 communicates with a feed passage 26 which is in communication with the outlet 21 of the feed pump, so that fuel under pressure is supplied to the other end of the cylinder 16 and the shuttle is moved towards said one end of the cylinder thereby causing the previously throttled quantity of fuel contained therein to be delivered to the injection pump for delivery to the engine during the next injection stroke.
  • the excursion of the shuttle in the cylinder therefore determines the quantity of fuel which will next be delivered to the engine.
  • the stop has the form of an axially movable cylindrical member in the form of a piston which is slidably mounted within a cylinder 51 the axis of which is at right angles to the axis of rotation of the distributor.
  • the piston 50 is loaded by a pair of coiled compression springs 52 and is moved against the action of the springs by fluid under pressure which is supplied to the right hand end of the cylinder 50 through a passage (not shown).
  • the fuel under pressure is obtained from the outlet of the feed pump, the outlet pressure of the feed pump being controlled in such a manner that it varies in accordance with the speed at which the apparatus is driven.
  • the right hand end of the cylinder 51 is closed by a plug housing 53 in which is located an angularly adjustable plug 54.
  • the plug 54 is provided with a projection 55 of a non-circular section and this is located within a complementary recess formed in the piston 50.
  • the piston 50 is allowed to move axially but its angular movement is prevented.
  • the plug member 54 by rotating the plug member 54 the angular setting of the piston can be adjusted.
  • the piston is provided with a cylindrical portion 56 which is eccentrically disposed relative to the axis of the bore 51. Furthermore, the surface of the cylindrical portion is contoured and defines a stop surface against which a projection 57 on the shuttle 17 can bear.
  • the arrangement is such that for a given setting of the plug 54 the permitted outward movement of the shuttle l7 will vary inaccordance with the speed at which the apparatus is driven. However, to enable initial adjustment of the maximum fuel quantity to take place the plug member 54 can be moved angularly to adjust the datum position of the stop surface.
  • a liquid fuel pumping apparatus for supplying fuel to internal combustion engines and comprising an injection pump including a plunger reciprocable within a cylinder, means for imparting movement to the plunger, an outlet communicating with said cylinder and through which fuel flows when movement is imparted to said plunger by said means, an inlet communicating with said cylinder and through which fuel flows to till the injection pump, a bore in which fuel is stored prior to flowing through said inlet to the injection pump, a shuttle movable in said bore, an axially movable member disposed for movement along an axis disposed substantially at right angles to the axis of the bore, a cylindrical portion of said member being eccentrically disposed relative to the axis of movement of the member, and a contoured stop surface formed on the cylindrical portion and against which the shuttle bears, the arrangement being that axial movement and angular movement of the member or both will vary the permitted excursion of the shuttle in the bore to control the volume of fuel flowing to the inlet.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Reciprocating Pumps (AREA)
US00077687A 1969-10-03 1970-10-02 Liquid fuel injection pumping apparatus Expired - Lifetime US3712761A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4862869 1969-10-03

Publications (1)

Publication Number Publication Date
US3712761A true US3712761A (en) 1973-01-23

Family

ID=10449319

Family Applications (1)

Application Number Title Priority Date Filing Date
US00077687A Expired - Lifetime US3712761A (en) 1969-10-03 1970-10-02 Liquid fuel injection pumping apparatus

Country Status (8)

Country Link
US (1) US3712761A (fr)
CA (1) CA929028A (fr)
DE (1) DE2047514A1 (fr)
ES (1) ES384534A1 (fr)
FR (1) FR2064961A5 (fr)
GB (1) GB1317567A (fr)
TR (1) TR16741A (fr)
ZA (1) ZA706453B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375945A (en) * 1980-01-31 1983-03-08 Kucas Industries Limited Fuel injection pumping apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194225A (en) * 1963-05-24 1965-07-13 Cav Ltd Liquid fuel injection pumps for internal combustion engines
US3433160A (en) * 1966-01-31 1969-03-18 Cav Ltd Liquid fuel pumping apparatus
US3500749A (en) * 1967-03-28 1970-03-17 Cav Ltd Liquid fuel pumping apparatus
US3506381A (en) * 1967-05-23 1970-04-14 Cav Ltd Liquid fuel pumping apparatus for supplying fuel to internal combustion engines
US3507579A (en) * 1967-05-23 1970-04-21 Cav Ltd Liquid fuel pumping apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126879A (en) * 1964-03-31 Fuel injection control mechanism
US2852011A (en) * 1956-11-13 1958-09-16 Studebaker Packard Corp Fuel injection system for internal combustion engine
FR1320254A (fr) * 1962-02-27 1963-03-08 Bosch Gmbh Robert Dispositif d'injection de carburant pour moteurs à combustion

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3194225A (en) * 1963-05-24 1965-07-13 Cav Ltd Liquid fuel injection pumps for internal combustion engines
US3433160A (en) * 1966-01-31 1969-03-18 Cav Ltd Liquid fuel pumping apparatus
US3500749A (en) * 1967-03-28 1970-03-17 Cav Ltd Liquid fuel pumping apparatus
US3506381A (en) * 1967-05-23 1970-04-14 Cav Ltd Liquid fuel pumping apparatus for supplying fuel to internal combustion engines
US3507579A (en) * 1967-05-23 1970-04-21 Cav Ltd Liquid fuel pumping apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375945A (en) * 1980-01-31 1983-03-08 Kucas Industries Limited Fuel injection pumping apparatus

Also Published As

Publication number Publication date
CA929028A (en) 1973-06-26
ES384534A1 (es) 1973-01-16
FR2064961A5 (fr) 1971-07-23
ZA706453B (en) 1971-05-27
TR16741A (tr) 1973-05-01
GB1317567A (en) 1973-05-23
DE2047514A1 (de) 1971-04-15

Similar Documents

Publication Publication Date Title
US3433159A (en) Liquid fuel injection pumps
US3592568A (en) Liquid fuel injection pumping apparatus
US3025797A (en) Liquid fuel pumps for internal combustion engines
US3319616A (en) Liquid fuel pumps for use with internal combustion engines
US3058425A (en) Liquid fuel pumps for internal combustion engines
US3263614A (en) Liquid fuel pumps
US4691679A (en) Fuel injection pumping apparatus
US3961861A (en) Fuel pumping apparatus
US3506381A (en) Liquid fuel pumping apparatus for supplying fuel to internal combustion engines
US3726263A (en) Liquid fuel pumping apparatus
US3663123A (en) Liquid fuel injection pumping apparatus
US2989003A (en) Liquid fuel pumps for internal combustion engines
US3498226A (en) Liquid fuel pumping apparatus
US3500749A (en) Liquid fuel pumping apparatus
US3712761A (en) Liquid fuel injection pumping apparatus
US3970414A (en) Liquid fuel injection pumping apparatus
US2922371A (en) Fuel injection pump
US3433160A (en) Liquid fuel pumping apparatus
US3101079A (en) Liquid fuel pumps for internal combustion engines
US3861835A (en) Liquid fuel pumping apparatus
US3811799A (en) Liquid fuel pumping apparatus
US3351020A (en) Liquid fuel injection pumps for internal combustion engines
US4725209A (en) Distributor type fuel injection pump
US3918853A (en) Liquid fuel pumping apparatus
US4378962A (en) Liquid fuel injection pumping apparatus