US3726263A - Liquid fuel pumping apparatus - Google Patents

Liquid fuel pumping apparatus Download PDF

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Publication number
US3726263A
US3726263A US00124181A US3726263DA US3726263A US 3726263 A US3726263 A US 3726263A US 00124181 A US00124181 A US 00124181A US 3726263D A US3726263D A US 3726263DA US 3726263 A US3726263 A US 3726263A
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United States
Prior art keywords
shuttle
fuel
slidable member
piston
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
US00124181A
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English (en)
Inventor
K Kemp
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Individual
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Individual
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Publication of US3726263A publication Critical patent/US3726263A/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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/06—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid
    • F02D1/065—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered by means dependent on pressure of engine working fluid of intake of air
    • 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
    • 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
    • F02M2041/1472—Devices for limiting maximum delivery or for providing excess fuel for starting or for correcting advance at starting

Definitions

  • the setting of the piece is determined by UNKTED STATES PATENTS axially movable member the axial position of which is 3,354,876 11/1967 Durham ..123 140 MP determined by a diaphragm to which is applied air 3,046,963 7/1962 Bessiere ..l23/ 139 BD under pressure from the inlet manifold of the as- 3,368,490 2/ 1968 Virello ..417/295 sociated engine, 2,465,784 3/1949 Berlyn ....4l7/295 2,297,234 9/1942 Meiswinkel ..4l9/295 4 Claims, 3 Drawing Figures Z0 Z1 10 22 A4 L 4 5Z 55 M 500.
  • This invention relates to liquid fuel pumping apparatus for supplying fuel to internal combustion engines and of the kind including a shuttle the allowed excursion of which in a cylinder determines the maximum quantity of fuel which will be supplied by the apparatus to an associated engine, a piston slidable within a cylinder, the position of the piston being dependant upon the speed at which the associated engine is driven, an adjustable piece supported within the piston and having a contoured surface presented towards the shuttle whereby as the piston moves the allowed excursion of the shuttle will vary.
  • the object of the invention is to provide such an apparatus in a simple and convenient form and in which adjustment of the excursion of the shuttle can be effected in accordance with the air pressure existing in the inlet manifold of the associated engine.
  • an apparatus of the kind specified is characterized in that there is engaged with the piece on the side thereof removed from the shuttle one end of a slidable pin, said pin bearing at its other end, upon the contoured surface of a slidable member, pressure responsive means being provided to effect adjustment of the member in accordance with the pressure existing in the inlet manifold of the engine.
  • FIG. 1 shows in sectional side elevation, a known form of apparatus
  • FIG. 2 is a section on the line 2-2 of FIG. 1, and
  • FIG. 3 the modification necessary to the apparatus of FIGS. 1 and 2 in accordance with the invention.
  • FIGS. 1 and 2 of the drawings there is provided a body part in whichthere is mounted a rotary cylindrical distributor 11 which is adapted to be driven in timed relationship with anassociated engine. At one end of the distributor there is located an injection pump including a. pair of pumping plungers 12 which are disposed within a transversely extending bore 13 formed in the distributor.
  • a cam ring 14 Surrounding this end of the distributor is a cam ring 14 having formed on its internal periphery, a plurality of pairs of carns. Intermediate the plungers respectively and the cam ring are a pair of rollers 15 which bear upon the cam ring so that as the distributor rotates inward movement will be imparted to the plungers as the rollers ride over the-cams. Intermediate the plungers the bore defines a fuel pumping chamber which is in communication with a longitudinal passage 16 formed in the distributor.
  • the passage 16 is in communication with a radially disposed delivery passage 17 which is arranged to register in turn as the distributor rotates, with a plurality of outlet passages 18 formed in the body part.
  • This registration of the delivery passage with an outlet passage takes place during the whole of the time the plungers 12 are moving inwardly and the arrangement is such that fuel will be displaced from the pumping chamber to the outlet passage 18 in turn.
  • the outlet passages are in use, connected to injection nozzles respectively mounted so as to direct fuel into the combustion spaces of the associated engine.
  • the longitudinal passage 16 is in communication with a plurality of radially disposed inlet passages 19 formed in the distributor and which can communicate in turn with an inlet port 20 formed in the body part. This communication takes place whilst the delivery passage 17 is out of register with the outlet passages 18 and during this time fuel flows from the inlet port 20 to the pumping chamber of the injection pump to provide a fresh charge of fuel for the next injection stroke of the injection pump.
  • the inlet port is in constant communication with one end of a cylinder 21 formed in the body part and mounted within the cylinder is a cylindrical and axially movable shuttle 22.
  • a vane type feed pump 23 the rotor of which is formed integrally with the distributor at the end thereof remote from the transverse bore.
  • the feed pump is provided with an inlet 24 which in use, is connected to a reservoir of fuel, and in addition the feed pump has an outlet 25.
  • the outlet pressure of the feed pump is controlled by any convenient valve so that it varies in a manner dependant upon the speed at which the distributor and hence the engine rotates.
  • the outlet 25 of the feed pump is in communication with a circumferential groove 26 formed in the periphery of the distributor and this is additionally in known manner and the throttle member functions by varying the effective size of a port 28 formed in the wall of the cavity.
  • This port is in communication with a further circumferential groove 29 formed in the periphery of the distributor. From the groove 29 extend a plurality of longitudinal grooves 30 and these are of a length so that they can register with the inlet port 20 and are alternately arranged with the passages 19.
  • a stop is provided to limit the excursion of the shuttle 22 away from the inlet port 20. It has been found that it is desirable to vary the maximum quantity of fuel which can be supplied to the engine in a manner which depends upon the speed of the engine and for this purpose the stop takes the form of a fluid pressure operable piston 36 which is accommodated and movable within a cylindrical chamber 37 disposed substantially at right angles to the longitudinal axis of the cylinder 21 containing the shuttle. The piston is loaded towards one end of the chamber by coiled compression springs 38 and is movable against the action of the springs by fuel under pressure from the outlet 25 of the feed pump which is supplied to one end of the chamber through a passage 39. Fuel leaves the other end of the chamber by way of a passage 40.
  • a transverse bore in which is mounted a piece 41 which can be moved relative to the piston in a direction substantially parallel to the axis of the cylinder 21 but which is fixed against angular movement by a pin which slides within a groove formed in the wall of the bore.
  • the end surface of the piece 41 and which is presented to the shuttle is suitably shaped so that for instance as the piston 36 is moved against the action of its springs the permitted movement of the shuttle away from the inlet port is reduced.
  • the other end of the piece 41 bears against a flat head of an adjusting screw 42 which can be adjusted from the exterior of the apparatus, so that during movement of the piston no relative movement of the piece relative to the piston occurs.
  • the maximum quantity of fuel which can be supplied to the engine is controlled and moreover by altering the setting of the adjusting screw 42 the apparatus can be adjusted quickly to suit a particular engine or a particular type of engine.
  • the apparatus it is only necessary to produce a range of such pieces 41 to enable the apparatus to be used to supply fuel to different types of engine.
  • the surface 43 of the piece 41 is provided with a recess 44 which enables an excess of fuel to be supplied to the engine for starting purposes.
  • a pin 45 which is slidable along the axis of movement of the shuttle 22.
  • the pin 45 projects through an apertured bush 46 secured within the pump body and it engages at one end with the piece 41.
  • the pin 45 engages with a contoured surface 47 formed upon an adjustable member 48 the axis of movement of which is at right angles to the axis of movement of the shuttle 22.
  • the member 48 is mounted within a body portion 49 which is adapted to be secured to the pump body 10.
  • the member 48 is loaded in one direction by means of a coiled compression spring 50 and in the rest position as is shown, the end of the member 48 abuts against a step 50a defined in the body 49.
  • the member 48 is provided with three lands 51 which guide the axial movement of the member and at the spring end of the member there are provided forks 52 engageable with complementary forks 53 formed on an angularly adjustable member 54.
  • the member 54 is provided with a locking ring 55. In this manner angular adjustment of the member 54 will effect angular adjustment of the member 48.
  • the surface 47 is of tapering cylindrical form and has its axis off set from the axis of the member 48 so that angular adjustment of the member will effect the initial setting of the pin 45, whilst the degree of taper of the surface fixes the variation in the setting of the pin 45 for a given movement of the member 48.
  • a rolling diaphragm 56 which is disposed between an internal cylindrical wall 57 defined in the body 49 and the external peripheral surface of a cup shaped member 58.
  • the member 58 is mounted on a push rod 59 which contacts the member 48.
  • the end of the push rod 59 remote from the member 48 is provided with a screw thread for the reception of a complementarily threaded nut 60 and this acts to maintain the cup shaped member 58, the diaphragm 56 and and a locating plate 61 in position on the bush rod.
  • the diaphragm 56 is sandwiched between the locating member 61 and the cup shaped member 58.
  • a coiled compression spring 62 is provided to urge the push rod into contact with the member 48.
  • the spring 62 is weaker than the spring 50 so that when the engine is at rest the member 48 contacts the step 50.
  • an inlet 63 for connection to the inlet manifold of the associated engine.
  • This engine is provided with a turbosupercharger so that the pressure within the inlet manifold will be higher than atmospheric pressure.
  • the other side of the diaphragm is exposed to a lower pressure and conveniently this is the drain pressure of the fuel.
  • an outlet 64 for connection for instance to the inlet of the feed pump and fuel leaking past the pin 45 will return to the inlet of the feed pump by way of the outlet.
  • the push rod 59 In use, as the inlet manifold pressure increases the push rod 59 will be moved towards the right as seen in FIG. 3 and the contoured surface 47 on the member 48 will act as a stop, increasing movement towards the right allowing a larger excursion of the shuttle 22.
  • a liquid fuel pumping apparatus for supplying fuel to internal combustion engines and compressing a cylinder, a shuttle movable within the cylinder, an injection pump to which fuel is supplied from the cylinder by movement of the shuttle therein, the maximum quantity of fuel which will be supplied by the apparatus being determined by the allowed excursion of the shuttle in the cylinder, a piston slidable within a further cylinder, means for altering the position of the piston in accordance with the speed of operation of the engine, an adjustable piece mounted within the piston, a contoured surface defined on said piece and presented to the shuttle, said surface constituting a stop for the shuttle whereby as the piston moves the allowed excursion of the shuttle will vary, the apparatus being characterized by a pin one end of which is engaged with the piece on the side thereof removed from the shuttle, a slidable member, said pin bearing at its other end, upon a contoured surface on the slidable member, and pressure responsive means to effect adjustment of the member in accordance with the pressure existing in the air inlet manifold of the engine.

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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)
  • High-Pressure Fuel Injection Pump Control (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
US00124181A 1970-03-18 1971-03-15 Liquid fuel pumping apparatus Expired - Lifetime US3726263A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1292770 1970-03-18

Publications (1)

Publication Number Publication Date
US3726263A true US3726263A (en) 1973-04-10

Family

ID=10013694

Family Applications (1)

Application Number Title Priority Date Filing Date
US00124181A Expired - Lifetime US3726263A (en) 1970-03-18 1971-03-15 Liquid fuel pumping apparatus

Country Status (8)

Country Link
US (1) US3726263A (xx)
JP (1) JPS5030762B1 (xx)
CA (1) CA929029A (xx)
DE (1) DE2112735C3 (xx)
ES (1) ES389700A1 (xx)
FR (1) FR2084804A5 (xx)
GB (1) GB1334381A (xx)
ZA (1) ZA711668B (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4052971A (en) * 1975-10-10 1977-10-11 Stanadyne, Inc. Fuel injection pump and timing control therefor
US4187818A (en) * 1977-09-15 1980-02-12 Lucas Industries Limited Fuel injection pumping apparatus for internal combustion engines including manifold pressure device
US4200072A (en) * 1977-05-18 1980-04-29 Caterpillar Tractor Co. Fuel injection pump
US4248188A (en) * 1978-12-29 1981-02-03 Cummins Engine Company, Inc. Hydraulic attenuator for air fuel control pump
US4384560A (en) * 1978-12-16 1983-05-24 Robert Bosch Gmbh Fuel injection system for Diesel engines, in particular for Diesel motor vehicle engines
US4429672A (en) * 1981-04-18 1984-02-07 Spica S.P.A. Device for controlling the rate of delivery of a fuel-injection for an internal-combustion engine
US4469066A (en) * 1981-05-14 1984-09-04 Diesel Kiki Company, Ltd. Injection timing compensator for fuel injection pump
US4512308A (en) * 1981-11-21 1985-04-23 Robert Bosch Gmbh Device for adjusting the full-load injection quantity of a fuel injection pump for internal combustion engines
US4844033A (en) * 1987-02-13 1989-07-04 Lucas Industries Public Limited Company Fuel injection pumping apparatus

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297234A (en) * 1938-01-26 1942-09-29 Meiswinkel Samuel Fuel pump regulation
US2465784A (en) * 1946-04-05 1949-03-29 American Bosch Corp Fuel supply apparatus for internalcombustion engines
US2869529A (en) * 1954-09-11 1959-01-20 Bosch Gmbh Robert Injection pump assembly
US3046963A (en) * 1959-12-10 1962-07-31 Bessiere Pierre Etienne Fuel injection systems for internal combustion engines with automatic variation of the advance of fuel injection
US3219020A (en) * 1963-07-12 1965-11-23 Vernon D Roosa Pump regulator
US3314406A (en) * 1964-01-09 1967-04-18 Cav Ltd Liquid fuel pumping apparatus for internal combustion engines
US3354876A (en) * 1965-10-21 1967-11-28 Roger O Durham Fuel injection system
US3368490A (en) * 1965-11-01 1968-02-13 Standard Screw Fuel pump and pressure equalization means therefor
US3477418A (en) * 1967-11-20 1969-11-11 Hartford Machine Screw Co Fuel supply system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2927570A (en) * 1958-02-03 1960-03-08 Gen Motors Corp Fuel injection system
GB1159091A (en) * 1966-01-31 1969-07-23 Cav Ltd Liquid Fuel Injection Pumping Apparatus.
GB1163951A (en) * 1966-02-07 1969-09-10 Cav Ltd Liquid Fuel Injection Pumping apparatus for supplying Fuel to Internal Combustion Engines of the Compression Ignition Type
FR1564208A (xx) * 1968-04-23 1969-04-18

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2297234A (en) * 1938-01-26 1942-09-29 Meiswinkel Samuel Fuel pump regulation
US2465784A (en) * 1946-04-05 1949-03-29 American Bosch Corp Fuel supply apparatus for internalcombustion engines
US2869529A (en) * 1954-09-11 1959-01-20 Bosch Gmbh Robert Injection pump assembly
US3046963A (en) * 1959-12-10 1962-07-31 Bessiere Pierre Etienne Fuel injection systems for internal combustion engines with automatic variation of the advance of fuel injection
US3219020A (en) * 1963-07-12 1965-11-23 Vernon D Roosa Pump regulator
US3314406A (en) * 1964-01-09 1967-04-18 Cav Ltd Liquid fuel pumping apparatus for internal combustion engines
US3354876A (en) * 1965-10-21 1967-11-28 Roger O Durham Fuel injection system
US3368490A (en) * 1965-11-01 1968-02-13 Standard Screw Fuel pump and pressure equalization means therefor
US3477418A (en) * 1967-11-20 1969-11-11 Hartford Machine Screw Co Fuel supply system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4052971A (en) * 1975-10-10 1977-10-11 Stanadyne, Inc. Fuel injection pump and timing control therefor
US4200072A (en) * 1977-05-18 1980-04-29 Caterpillar Tractor Co. Fuel injection pump
US4187818A (en) * 1977-09-15 1980-02-12 Lucas Industries Limited Fuel injection pumping apparatus for internal combustion engines including manifold pressure device
US4384560A (en) * 1978-12-16 1983-05-24 Robert Bosch Gmbh Fuel injection system for Diesel engines, in particular for Diesel motor vehicle engines
US4248188A (en) * 1978-12-29 1981-02-03 Cummins Engine Company, Inc. Hydraulic attenuator for air fuel control pump
US4429672A (en) * 1981-04-18 1984-02-07 Spica S.P.A. Device for controlling the rate of delivery of a fuel-injection for an internal-combustion engine
US4469066A (en) * 1981-05-14 1984-09-04 Diesel Kiki Company, Ltd. Injection timing compensator for fuel injection pump
US4512308A (en) * 1981-11-21 1985-04-23 Robert Bosch Gmbh Device for adjusting the full-load injection quantity of a fuel injection pump for internal combustion engines
US4844033A (en) * 1987-02-13 1989-07-04 Lucas Industries Public Limited Company Fuel injection pumping apparatus

Also Published As

Publication number Publication date
CA929029A (en) 1973-06-26
DE2112735C3 (de) 1975-06-12
DE2112735A1 (de) 1971-10-07
FR2084804A5 (xx) 1971-12-17
JPS5030762B1 (xx) 1975-10-03
GB1334381A (en) 1973-10-17
ES389700A1 (es) 1973-06-01
DE2112735B2 (de) 1974-10-31
ZA711668B (en) 1971-12-29

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