US3509823A - Liquid fuel pumping apparatus - Google Patents

Liquid fuel pumping apparatus Download PDF

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Publication number
US3509823A
US3509823A US740247A US3509823DA US3509823A US 3509823 A US3509823 A US 3509823A US 740247 A US740247 A US 740247A US 3509823D A US3509823D A US 3509823DA US 3509823 A US3509823 A US 3509823A
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US
United States
Prior art keywords
fuel
inlet
cylinders
pair
liquid fuel
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
US740247A
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English (en)
Inventor
Kenneth Albert Walters Kemp
Paul Edgar Glikin
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CAV Ltd
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CAV Ltd
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Filing date
Publication date
Application filed by CAV Ltd filed Critical CAV Ltd
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Publication of US3509823A publication Critical patent/US3509823A/en
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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
    • F02M41/1405—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 pistons being disposed radially with respect to rotation axis
    • F02M41/1411—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 pistons being disposed radially with respect to rotation axis characterised by means for varying fuel delivery or injection timing
    • F02M41/1427—Arrangements for metering fuel admitted to pumping chambers, e.g. by shuttles or by throttle-valves
    • 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

Definitions

  • a liquid fuel pumping apparatus for supplying fuel to an internal combustion engine and comprising an injec-' tion pump to which fuel is supplied by way of an inlet passage, the inlet passage registering in turn with the ends of a pair of cylinders, containing movable shuttles, respectively one of said cylinders delivering fuel to the injection pump whilst the other cylinder is receiving fuel from a feed pump under the control of a throttle for subsequent delivery to the injection pump.
  • This invention relates to liquid fuel pumping apparatus for supplying fuel to an internal combustion engine having an even number of cylinders, the apparatus being of the kind comprising an injection pump which is adapted to be driven in timed relationship with the engine, and which during an injection stroke delivers a predetermined quantity of fuel, a rotary distributor member having a delivery passage through which during an injection stroke, fuel flows from the injection pump to one of a plurality of outlet ports, the distributor member also having an inlet passage through which fuel flows to the injection pump during a filling stroke thereof, the apparatus also including a feed pump for supplying fuel to the injection pump and a throttle for control-ling the quantity of fuel supplied by the feed pump.
  • the object of the invention is to provide such an apparatus in a simple and convenient form.
  • the inlet passage is arranged to register during successive filling strokes alternately, with a pair of inlet ports, the inlet ports being in communication respectively With one end of a pair of cylinders, each cylinder containing a slidable shuttle, and the distributor member is provided with a feed groove or the equivalent through which fuel from the feed pump under the control of the throttle, flows to said ends of the cylinders for subsequent delivery to the injection pump.
  • FIG. 1 is a sectional side elevation of one example of a liquid fuel pumping apparatus in accordance with the invention and FIG. 2 is a section on the line 22 of FIG. 1.
  • a body part 10 in which is mounted a rotary cylindrical distributor member 11.
  • the distributor member 11 is adapted to be driven in timed relationship with an engine with which the apparatus is associated and is coupled to a drive shaft 12.
  • a fuel feed pump 13 At one end of the distributor member there is mounted the rotary part of a fuel feed pump 13 which has an inlet 14 for liquid fuel, and an outlet 15.
  • the inlet and outlet are interconnected through a valve 16 which controls the output pressure of the fuel delivered by the feed pump in a manner so that it is dependent upon the speed at which the apparatus is driven.
  • the feed pump 13 is of the vane type and the valve incorporates a spring loaded ball which controls the effective size of a spill orifice.
  • the inlet 14 of the feed pump is in communication with a fuel inlet 17 formed in the body part and which in use, is connected to a source of liquid fuel.
  • an injection pump and this comprises an annular cam ring 18 mounted within the body part and having a plurality of pairs of diametrically disposed and nwardly projecting cam lobes (not shown). Also forming part of the injection pump is a pair of pumping plungers 19 which are located within a transversely extending bore 20 formed in the distributor member. As the distributor member rotates, inward movement is imparted to the pumping plungers 20 by the interaction of rollers 21 mounted at their outer ends respectively with the lobes of the cam ring 18.
  • the transversely extending bore is in communication with a longitudinal bore 22 formed in the distributor member and which at one point is provided with a radially disposed delivery passage 23.
  • the delivery passage is arranged to register in turn and as the distributor member rotates, with a plurality of outlet ports 24 which are formed in the body part. In the particular example, eight such outlet ports are provided and these are equi-angularly spaced about the periphery of the distributor member.
  • Theoutlet ports are adapted for connection respectively to the injection nozzles 25 of the associated engine, and the communication between the delivery passage and an outlet port occurs during the time when the pumping plungers 19 are moved inwardly by the cam lobes.
  • inlet passages 26 are formed, and the inner ends of these passages are in communication with the longitudinal passage 22.
  • feed grooves 27 are alternately positioned relative to the inlet passages and formed on the periphery of the distributing member, each of which is in communication with a first circumferential groove formed in the periphery of the distributing member. This groove is in communication with the outlet 15 of the feed pump by way of a throttle 28 which controls the flow of fuel from the feed pump through a passage 29.
  • the setting of the throttle is under the control of a speed sensitive governor (not shown) the characteristic of which can be adjusted by the operator.
  • inlet ports 30, 31 formed in the body part are a pair of inlet ports 30, 31 (FIG. 2) which are positioned to register with the inlet passages 26 and the feed grooves 27.
  • the inlet ports 30, 31 are spaced circumferentially by a distance which is equal to the spacing between a feed groove and the adjacent inlet passages.
  • the inlet ports communicate respectively with the inner ends of a pair of cylinders 32, 33 formed in the body part, each cylinder containing a freely movable shuttle 34, 35.
  • a pair of stops 36, 37 respectively, the setting of which can be varied by means of a fluid pressure operable piston 38.
  • This piston is loaded by means of a coiled compression spring 39 in one direction, and is moved in opposition to the spring by fuel under pressure derived directly from the outlet of the feed pump.
  • the piston has mounted therein a pair of members 40 which have cam surfaces defined on their sides which are presented to the stops.
  • the members are adjustably mounted within the piston, and can be adjusted by means of a pair of adjustors 41 respectively operable from the exterior of the apparatus.
  • the cam surfaces are shaped so that as the output pressure of the feed pump increases, the permitted extent of movement of the shuttles within their cylinders is reduced.
  • the distributor member is provided with four equiangularly spaced drain grooves 44 which are in communication by way of a passage (not shown) with a drain defined by free space within the body part of the apparatus, and the drain grooves 44 are angularly aligned with the feed grooves 27.
  • the drain grooves register in turn with a pair of circumferentially spaced drain ports 45 which communicate with the outer ends of the cylinders 32, 33 respectively, and the drain ports 45 are angularly aligned with the supply ports 43 respec tively.
  • a predetermined quantity of fuel is stored at the inner end of the cylinder 33.
  • the delivery passage 23 is brought into register with one of the outlet ports 24 and meanwhile the feed groove and the inlet passage are moved out of register with both inlet ports. During this time inward movement is imparted to the plungers and fuelis delivered by the injection pump to the outlet port.
  • the delivery passage 23 is moved out of register with the outlet port 24, and a feed groove 27 moves into register with an inlet port and an inlet passage is moved into register with the other inlet port, and the filling of one of the cylinders and the filling of the injection pump takes place as described above.
  • one of the shuttles moves inwardly to supply a fresh quantity of fuel to the injection pump, whilst the other shuttle moves ,outwardly ready for inward movement during the next filling stroke.
  • a liquid fuel pumping apparatus for supplying fuel to an internal combustion engine having an even number of cylinders, the apparatus being of the kind comprising an injection pump which is adapted to be driven in timed relationship with the engine and which during an injection stroke, delivers a predetermined quantity of fuel, a rotary distributor member, mounted within a body, a plurality of outlet ports in the body, a delivery passage formed in said member and communicating with said injection pump, said distributor member also being driven in timed relationship with the engine so that the delivery passage registers in turn during an injection stroke with an outlet port, an inlet passage formed in the distributor member, said inlet passage also communicating with the injection pump, a feed pump for supplying fuel under pressure, a throttle for controlling the quantity of fuel supplied to the injection pump from the feed pump, a pair of inlet ports in the body and with which the inlet passage is arranged to register alternately during successive filling strokes, a pair of cylinders formed in the body, said inlet ports being in communication respectively with one end of said pair of cylinders, a slidable
  • An apparatus as claimed in claim 1 including first means whereby the other end of the cylinder whose one end is in communication with the inlet passage, is placed in communication with the outlet of the feed pump thereby to move the shuttle therein towards said one end of the cylinder and to displace the fuel contained in said one end of the cylinder to the injection pump and second means whereby the other end of the other cylinder whose one end is in communication with the feed groove is placed in communication with a drain thereby to permit the shuttle therein to move towards said other end of the cylinder.
  • An apparatus as claimed in claim 2 including stop means for limiting the extent of movement of the shuttles towards the other end of their cylinders.
  • stop means comprises a fluid pressure operable spring loaded piston, a pair of cylindrical stops coaxially positioned relative to the cylinders respectively andagainst which the shuttles respectively can bear, a pair of members adjustably mounted in the piston, the surfaces of said members which are presented to the stops defining cam surfaces, and a pair of adjusters whereby the positions of the members relative to the piston can be adjusted, the arrangement being such that axial movement of the piston will effect variation in the setting of the stops.

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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)
US740247A 1967-07-04 1968-06-26 Liquid fuel pumping apparatus Expired - Lifetime US3509823A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB30753/67A GB1223118A (en) 1967-07-04 1967-07-04 Liquid fuel injection pumping apparatus

Publications (1)

Publication Number Publication Date
US3509823A true US3509823A (en) 1970-05-05

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ID=10312602

Family Applications (1)

Application Number Title Priority Date Filing Date
US740247A Expired - Lifetime US3509823A (en) 1967-07-04 1968-06-26 Liquid fuel pumping apparatus

Country Status (4)

Country Link
US (1) US3509823A (fr)
DE (1) DE1751645C3 (fr)
FR (1) FR1574267A (fr)
GB (1) GB1223118A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861833A (en) * 1973-02-28 1975-01-21 Stanadyne Inc Fuel injection pump
US4528965A (en) * 1984-03-27 1985-07-16 Caterpillar Tractor Co. Rotor balancing for distribution valve
US4554901A (en) * 1984-03-27 1985-11-26 Caterpillar Tractor Co. Fluid distributing apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3435881B2 (ja) * 1995-03-22 2003-08-11 株式会社デンソー 分配型燃料噴射ポンプ

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3107661A (en) * 1962-07-23 1963-10-22 Cav Ltd Liquid fuel pumps for internal combustion engines
US3194225A (en) * 1963-05-24 1965-07-13 Cav Ltd Liquid fuel injection pumps for internal combustion engines
US3263614A (en) * 1963-12-05 1966-08-02 Cav Ltd Liquid fuel pumps
US3292546A (en) * 1964-02-11 1966-12-20 Cav Ltd Apparatus for supplying fuel to internal combustion engines
US3319616A (en) * 1964-02-25 1967-05-16 Cav Ltd Liquid fuel pumps for use with internal combustion engines
US3433160A (en) * 1966-01-31 1969-03-18 Cav Ltd Liquid fuel pumping apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3107661A (en) * 1962-07-23 1963-10-22 Cav Ltd Liquid fuel pumps for internal combustion engines
US3194225A (en) * 1963-05-24 1965-07-13 Cav Ltd Liquid fuel injection pumps for internal combustion engines
US3263614A (en) * 1963-12-05 1966-08-02 Cav Ltd Liquid fuel pumps
US3292546A (en) * 1964-02-11 1966-12-20 Cav Ltd Apparatus for supplying fuel to internal combustion engines
US3319616A (en) * 1964-02-25 1967-05-16 Cav Ltd Liquid fuel pumps for use with internal combustion engines
US3433160A (en) * 1966-01-31 1969-03-18 Cav Ltd Liquid fuel pumping apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861833A (en) * 1973-02-28 1975-01-21 Stanadyne Inc Fuel injection pump
US4528965A (en) * 1984-03-27 1985-07-16 Caterpillar Tractor Co. Rotor balancing for distribution valve
US4554901A (en) * 1984-03-27 1985-11-26 Caterpillar Tractor Co. Fluid distributing apparatus

Also Published As

Publication number Publication date
DE1751645A1 (de) 1971-04-01
GB1223118A (en) 1971-02-24
DE1751645B2 (de) 1973-06-20
DE1751645C3 (de) 1974-01-24
FR1574267A (fr) 1969-07-11

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