US3487783A - Liquid fuel injection pumps - Google Patents

Liquid fuel injection pumps Download PDF

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Publication number
US3487783A
US3487783A US3487783DA US3487783A US 3487783 A US3487783 A US 3487783A US 3487783D A US3487783D A US 3487783DA US 3487783 A US3487783 A US 3487783A
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US
United States
Prior art keywords
flow
plunger
fluid
cylinder
piston
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
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English (en)
Inventor
John Patrick Stewart Curran
David Elliot
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.)
Bryce Berger Ltd
Original Assignee
Bryce Berger 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 Bryce Berger Ltd filed Critical Bryce Berger Ltd
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Publication of US3487783A publication Critical patent/US3487783A/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
    • 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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/105—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive hydraulic drive
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7784—Responsive to change in rate of fluid flow
    • Y10T137/7787—Expansible chamber subject to differential pressures
    • Y10T137/7791—Pressures across flow line valve

Definitions

  • LIQUID FUEL INJECTION PUMPS Filed June 14, 1968 2 Sheets-Sheet 2 INVE TOR 7 21.01.10? kuwcm L) cflaudd United States Patent 3,487,783 LIQUID FUEL INJECTION PUMPS John Patrick Stewart Curran, Tuifley, and David Elliot, Stroud, England, assignors to Bryce Berger Limited, Gloucestershire, England Filed June 14, 1968, Ser. No. 737,143 Int. Cl. F0411 13/042, 17/00; F15b 11/08 U.S. Cl.
  • a fuel injection pump comprising a reciprocable plunger which during inward movement displaces fuel until a spill port is opened, a piston being provided to effect inward movement of the plunger and the piston having fluid pressure applied thereto from a source by way of a valve and a flow regulator, the flow regulator acting to limit the rate of flow of fluid when the port is opened.
  • This invention relates to liquid fuel injection pumps for supplying fuel to a combustion space of an internal combustion engine and of the kind comprising in combination, a pump plunger which during a pumping stroke displaces fuel from a pumping chamber to the engine, the termination of discharge to the engine being effected by the uncovering of a spill port by the plunger at a predetermined position during the pumping stroke, and a fluid pressure operable piston contained within a cylinder for imparting movement to the plunger, said cylinder being arranged to receive fluid under pressure from a source in timed relationship with the engine.
  • a flow regulator is provided to control the flow of fluid into said cylinder, said flow regulator being adjusted so that when the resistance to the flow of fluid decreases, as a result of the spill port being uncovered by the plunger, the flow regulator moves to restrict the rate of flow of fluid into the cylinder, thereby limiting the acceleration of the plunger and piston.
  • FIGURE 1 is a sectional side elevation showing one example of a pump in accordance with the invention.
  • FIGURE 2 is a view of part of the pump shown in FIGURE 1 to an enlarged scale.
  • a pumping plunger which is accommodated within a cylindrical bore formed in the body part of the pump.
  • the inner end of the bore is in communication with an outlet 11, and for controlling the flow of fuel through this outlet, there is provided a non-return delivery valve 12.
  • the outlet is connected to a fuel injection nozzle 13 which is arranged to direct fuel into a combustion space of an engine with which the pump is associated.
  • a spill part 14 which is in communication with a fuel supply chamber 15 formed in the body part and which, in use, is connected to a source of liquid fuel.
  • a helical groove 16 which is in communication with the pumping chamber defined by the bore.
  • the plunger is loaded in the outward direction by means of a coiled compression spring 17 and for moving the plunger inwardly against the action of the spring, a fluid pressure operable piston 18 is provided. This is located within a cylinder 19 which may be formed in the body part of the pump or in a part adapted to be secured thereto.
  • a source 20 of fluid under pressure may comprise a pump which is driven by the engine and which supplies fluid to an accumulator. Fluid under pressure is supplied to the cylinder under the control of a valve 21 which is operated in timed relationship to the engine, and the arrangement is such that when the valve is opened, fluid under pressure acts on the piston 18 to effect inward movement of the plunger 10.
  • the return motion of the piston 18 and the plunger 10 is effected by closing the valve 21 and opening a valve 25 which is operated in synchronism with the valve 21.
  • the valve 25 when opened allows fluid to flow from the cylinder 19 to a drain.
  • a flow regulator 23 is provided to control the flow of fluid into the cylinder.
  • the flow regulator comprises an elongated cylindrical chamber 30, the opposite ends of which are closed by adjustable plugs 31, 32.
  • the plug 31 constitutes a stop, and the other plug constitutes an abutment for a coiled compression spring 33.
  • Intersecting the chamber is a flow passage 34 through which fluid is arranged to flow to the cylinder containing the piston, and slidably accommodated within the chamber is a regulator element 35 upon one end of which acts the spring.
  • the regulator element is of reduced section intermediate its ends and at a position corresponding to the flow passage.
  • the end of the element upon which the spring 33 acts is exposed to the pressure at the downstream end of the flow passage, and the other end of the valve element is exposed to the pressure at the upstream end of the flow passage.
  • the plugs 31, 32 are adjusted so that the regulator offers little restriction to the flow of fluid to the cylinder 19 when the spill port 14 is closed.
  • the pressure drop which occurs between the ends of the flow passage increases sufficiently to move the regulator element 35 against the action of the spring. This movement restricts the effective area of the flo'w passage so that the rate at which fluid can pass to the cylinder is also restricted, and the acceleration of the piston and plunger is limited.
  • the pressure drop also increases, the final result being complete closure of the flow passage.
  • Adjustment of the plug 32 enables the regulator to be adjusted to operate at a given pressure drop, whilst adjustment of the plug 31 serves to enable the regulator to be adjusted to operate at a given flow.
  • a liquid fuel injection pump for supplying fuel to a combustion space of an internal combustion engine and of the kind comprising in combination, a body in which is defined a bore, a pump plunger slidable within the bore and which during a pumping stroke displaces fuel from the bore to the engine, a spill port which is uncovered by the plunger at a predetermined position during the pumping stroke to terminate the discharge of fuel to the engine, a fluid pressure operable piston contained within a cylinder for imparting movement to the plunger, and a flow regulator for controlling the flow of fluid into said cylinder from a source, said flow regulator being adjusted so that when the resistance to the flow of fluid decreases, as a result of the spill port being uncovered by the plunger, the flow regulator moves to restrict the rate of flow of fluid into the cylinder, thereby limiting the acceleration of the plunger and piston.
  • a pump as claimed in claim 1 including a first valve operable in synchronism with the engine to admit fluid under pressure from said source to the cylinder through said flow regulator and a second valve operable in synchronism with the engine to permit fluid to escape from said cylinder.
  • a pump as claimed in claim 1 in which said flow regulator comprises a spring loaded regulator element slidable within a chamber defined in a body part, a flow passage defined in said body part and through which fluid flows from said source to the cylinder, said chamber in- K tersecting said flow passage and the element defining a restriction to the flow of fluid through the flow passage, means biasing the element towards one end of the chamber, passage means through which said one end and the other end of the chamber are in communication with the upstream and downstream ends of the flow passage respectively whereby the element is exposed to the pressure drop across the restriction the arrangement being that when said pressure drop increases due to the reduced resistance to the flow of fluid when the spill port opens, the element will move to restrict the rate of flow of fluid through the flow passage.
  • a pump as claimed in claim 3 including a pair of adjustable plugs serving to close the opposite ends of the chamber, the plug at said one end of the chamber defining a stop for the valve element whereby the degree of restriction to the flow of fluid through the flow passage can be adjusted, and the plug at the other end of the chamber defining an abutment for the spring whereby the force exerted by the spring can be adjusted.

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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)
US3487783D 1967-05-26 1968-06-14 Liquid fuel injection pumps Expired - Lifetime US3487783A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2461567A GB1216837A (en) 1967-05-26 1967-05-26 Liquid fuel injection pumps

Publications (1)

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US3487783A true US3487783A (en) 1970-01-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
US3487783D Expired - Lifetime US3487783A (en) 1967-05-26 1968-06-14 Liquid fuel injection pumps

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US (1) US3487783A (enrdf_load_html_response)
FR (1) FR1574295A (enrdf_load_html_response)
GB (1) GB1216837A (enrdf_load_html_response)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4060347A (en) * 1975-09-16 1977-11-29 Cav Limited Liquid fuel pumping apparatus
US4082481A (en) * 1976-02-24 1978-04-04 Cav Limited Fuel injection pumping apparatus
US4167373A (en) * 1973-05-11 1979-09-11 C.A.V. Limited Fuel injection pumping apparatus
CN117759723A (zh) * 2023-08-22 2024-03-26 君品集团有限公司 一种流量调节器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH671809A5 (enrdf_load_html_response) * 1986-09-09 1989-09-29 Nova Werke Ag

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1956612A (en) * 1932-03-30 1934-05-01 & D Expl Du Generateur A Pisto Fuel injection pump for internal combustion engines
US2033579A (en) * 1933-07-26 1936-03-10 Koster Fuel pump for diesel engines with air-free injection
US2662476A (en) * 1950-06-08 1953-12-15 Louis O French Fuel injection apparatus
US2756724A (en) * 1955-06-23 1956-07-31 Henderson Y Stewart Safety valve lock arrangement
US2879745A (en) * 1955-03-22 1959-03-31 Vickers Inc Dual throttling motor control circuit
US3168010A (en) * 1963-01-09 1965-02-02 Waterman Hydraulics Corp Sequence valves

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1956612A (en) * 1932-03-30 1934-05-01 & D Expl Du Generateur A Pisto Fuel injection pump for internal combustion engines
US2033579A (en) * 1933-07-26 1936-03-10 Koster Fuel pump for diesel engines with air-free injection
US2662476A (en) * 1950-06-08 1953-12-15 Louis O French Fuel injection apparatus
US2879745A (en) * 1955-03-22 1959-03-31 Vickers Inc Dual throttling motor control circuit
US2756724A (en) * 1955-06-23 1956-07-31 Henderson Y Stewart Safety valve lock arrangement
US3168010A (en) * 1963-01-09 1965-02-02 Waterman Hydraulics Corp Sequence valves

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4167373A (en) * 1973-05-11 1979-09-11 C.A.V. Limited Fuel injection pumping apparatus
US4060347A (en) * 1975-09-16 1977-11-29 Cav Limited Liquid fuel pumping apparatus
US4082481A (en) * 1976-02-24 1978-04-04 Cav Limited Fuel injection pumping apparatus
CN117759723A (zh) * 2023-08-22 2024-03-26 君品集团有限公司 一种流量调节器
CN117759723B (zh) * 2023-08-22 2024-05-17 君品集团有限公司 一种流量调节器

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Publication number Publication date
FR1574295A (enrdf_load_html_response) 1969-07-11
GB1216837A (en) 1970-12-23
DE1751656A1 (de) 1970-12-03
DE1751656B2 (de) 1976-03-18

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