US3918853A - Liquid fuel pumping apparatus - Google Patents

Liquid fuel pumping apparatus Download PDF

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Publication number
US3918853A
US3918853A US47243574A US3918853A US 3918853 A US3918853 A US 3918853A US 47243574 A US47243574 A US 47243574A US 3918853 A US3918853 A US 3918853A
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US
United States
Prior art keywords
passage
injection pump
fuel
valve element
valve
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
Moshe Drori
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Individual
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Individual
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Filing date
Publication date
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Publication of US3918853A publication Critical patent/US3918853A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/462—Delivery valves
    • 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
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump
    • Y10T137/86115—Downstream cyclic distributor

Definitions

  • a liquid fuel pumping apparatus for supplying fuel to Ma 25, 1973 United Kingdom 35245/73 an internal combustion engine includes an injection pump which delivers fuel past a delivery valve.
  • a restricted passage is [58] Field Of Search 417/458. 462, 558, 206; provided in the valve element and which allows n 123/ 139 AL, 139 BC, 139 B1); ditional flow of fuel between the injection pump and I 137/565 ⁇ , 565;) an outlet during the delivery stroke of the pump.
  • the injection pump and distributor member being adapted to be driven in timed relationship with an associated engine
  • the distributor member including a passage communicating with the pumping chamber of the injection pump, and said passage registering in turn during successive delivery strokes of the injection pump with outlet ports formed in the body part and which in use, communicate respectively with the injection nozzles of an assosciated engine, and a delivery valve in said passage, said delivery valve opening during the delivery of fuel by the injection pump.
  • the object of the invention is to provide such an apparatus in a simple and convenient form.
  • said delivery valve comprises an axially v movable valve element, resilient means biasing the valve element to a position in which flow of fuel from said passage to the injection pump is prevented, restricted passage means in said valve element and a valve member in said passage means, said valve member closing to prevent flow of fuel through said passage means from said passage to the injection pump.
  • the injection pump comprises a pair of reciprocable pumping plungers which are accomodated within a transversely extending bore formed in the distributor member.
  • an annular cam ring Surrounding the distributor member is an annular cam ring on the internal peripheral surface of which is formed a plurality of pairs of inwardly extending cam lobes. Interposed between the internal surface of the cam ring and the plungers are rollers respectively which are mounted upon shoes.
  • the pumping chamber of the injection pump communicates with a passage 13 formed in the distributor member and which communicates with a radially extending passage 14.
  • the radially extending passage breaks out onto the periphery of the distributor member and is positioned to register in turn, and during successive delivery strokes of the injection pump, with a plurality of outlet ports 15 formed in the body part 10.
  • the outlet ports in use are connected respectively to injection nozzles 16 mounted on the associated engine.
  • the apparatus also includes a feed pump not shown which supplies fuel to the injection pump during the filling strokes thereof, the amount of fuel supplied to the injection pump being controlled by throttling means not shown.
  • the apparatus also includes a delivery valve generally indicated at 17, the delivery valve being positioned in the passage 13.
  • the delivery valve 17 comprises a valve element 18 slidable within an enlarged portion of the passage 13, and the element 18 is loaded into contact with the step defined in the passage 13 by means of a coiled compression spring 19.
  • a blind main bore 20 whichthrough ports 21, communicates with a groove 22 formed in the periphery of the valve element.
  • the passage 14 extends from a still further enlargement of the passage 13 and when fuel under pressure is supplied by the injection pump, thevalve element is moved axially until the groove 22 is exposed beyond the step defined between the two enlarged portions of the passage.
  • a restricted passage means which includes a passage 23 defining a restricted orifice opening into a closed chamber 24 from which extend a pair of passages 25.
  • the step defined between the chamber 24 and the passage 23, constitutes a seating for a valve member in the form of a ball 26 and the chamber 24 is closed by a plug 28 which constitutes a stop to limit the movement of the ball.
  • a main stop 27 is provided to limit the movement of the valve element 18 against the action of the spring 19.
  • the valve element 18 In operation, during an injection stroke of the injection pump, the valve element 18 will be moved by the action of the fuel leaving the injection pump, against the action of the spring 19. The groove 22 will be exposed beyond the aforesaid step to allow flow of fuel from the injection pump to the passage 14.
  • the ball 26 During the supply of fuel by the injection pump, the ball 26 will be lifted from the seating and a proportion of the fuel flowing to the passage 14 will flow by way of the restricted passage means.
  • the quantity of fuel flowing through the passage means depends upon the size of the orifice and the pressure difference across the orifice.
  • the pressure difference will in part be dependendt upon the inertia of the valve element 18.
  • the provision of the passage reduces the rate of movement of the valve element and therefore the rate of compression of the spring and this helps to increase the life of the spring.
  • the provision of the ball 26 helps to facilitate the removal of air in the various passages of the apparatus when the apparatus is being primed with fuel.
  • valve element 18 At the end of the delivery of fuel by the injection pump, the valve element 18 will move under the action of the spring 19. During this process, the ball is maintained in contact with its seating by the pressure of fuel within the passage 14. The volume of fuel therefore relieved from the passage 14 is substantially equal to the displacement of the valve element 18.
  • a liquid fuel pumping apparatus for supplying fuel to an internal combustion engine comprising in combination, an injection pump, a body part, a distributor member rotatable in the body part, the injection pump and distributor member being adapted to be driven in time relationship with an associated engine, the distributor member including a passage communicating with the injection pump, the body part having outlet ports formed therein and said passage registering in turn during successive delivery strokes of the injection pump with the outlet ports formed in the body part and which in use, communicate respectively with the injection nozzles of an associated engine, a delivery valve in said passage and containing bore means open in one position to provide communication between said pump and passage and closed by portions of the distributor member in another position, said delivery valve opening during the delivery of fuel by the injection pump, said delivery valve comprising an axially movable valve element, resilient means biasing the valve element to a position in which flow of fuel from said passage to the injection pump is prevented, restricted passage means in said valve element and communicating between the bore means and the passage and a valve member in said passage means, said valve member closing to prevent flow of fuel through
  • valve element is slidable within an enlarged portion of said passage, said passage being provided with a further enlarged portion thereby defining a step between said portions, said valve element having a peripheral groove communicating with the upstream end of the valve element and which during the delivery of fuel by the injection pump is exposed beyond said step as the valve element moves against the action of the resilient means.
  • valve member is in the form of a ball.
US47243574 1973-05-25 1974-05-22 Liquid fuel pumping apparatus Expired - Lifetime US3918853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2524573A GB1465903A (en) 1973-05-25 1973-05-25 Liquid fuel pumping apparatus

Publications (1)

Publication Number Publication Date
US3918853A true US3918853A (en) 1975-11-11

Family

ID=10224569

Family Applications (1)

Application Number Title Priority Date Filing Date
US47243574 Expired - Lifetime US3918853A (en) 1973-05-25 1974-05-22 Liquid fuel pumping apparatus

Country Status (6)

Country Link
US (1) US3918853A (fr)
JP (1) JPS5743734B2 (fr)
DE (1) DE2425361C3 (fr)
FR (1) FR2230871B1 (fr)
GB (1) GB1465903A (fr)
IT (1) IT1013226B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146003A (en) * 1976-06-26 1979-03-27 Lucas Industries Limited Fuel injection pumping apparatus with drain passage
US4201170A (en) * 1978-07-31 1980-05-06 Stanadyne, Inc. Fuel injection pump with positive displacement delivery valve having two port areas opened according to fuel flow rate
US4232644A (en) * 1978-01-19 1980-11-11 Lucas Industries Limited Fuel pumping apparatus
US5207202A (en) * 1990-04-17 1993-05-04 Lucas Industries Public Limited Company Fuel pumping apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363569A (en) * 1965-12-09 1968-01-16 Vernon D. Roosa Fuel pump and purging system therefor
US3427979A (en) * 1966-03-22 1969-02-18 Cav Ltd Liquid fuel pumping apparatus for supplying fuel to internal combustion engines
US3465678A (en) * 1966-10-21 1969-09-09 Cav Ltd Liquid fuel pumping apparatus
US3465677A (en) * 1966-10-06 1969-09-09 Cav Ltd Liquid fuel pumping apparatus
US3752138A (en) * 1971-08-09 1973-08-14 Int Harvester Co Engine injection pump operating all cylinders or less

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE665886C (de) * 1936-12-12 1939-08-11 Orange Rudolf L Brennstoff-Einspritzpumpe fuer Vor- und Haupteinspritzung
US2656851A (en) * 1950-09-07 1953-10-27 American Locomotive Co Fuel pump delivery valve
US3477458A (en) * 1965-01-07 1969-11-11 Int Harvester Co Fuel delivery valve assembly and method
DE2027827A1 (de) * 1969-06-12 1970-12-17 Roosa, Vernon Davis, West Hartford, Conn. (V.St.A.) Brennstoffpumpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3363569A (en) * 1965-12-09 1968-01-16 Vernon D. Roosa Fuel pump and purging system therefor
US3427979A (en) * 1966-03-22 1969-02-18 Cav Ltd Liquid fuel pumping apparatus for supplying fuel to internal combustion engines
US3465677A (en) * 1966-10-06 1969-09-09 Cav Ltd Liquid fuel pumping apparatus
US3465678A (en) * 1966-10-21 1969-09-09 Cav Ltd Liquid fuel pumping apparatus
US3752138A (en) * 1971-08-09 1973-08-14 Int Harvester Co Engine injection pump operating all cylinders or less

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146003A (en) * 1976-06-26 1979-03-27 Lucas Industries Limited Fuel injection pumping apparatus with drain passage
US4232644A (en) * 1978-01-19 1980-11-11 Lucas Industries Limited Fuel pumping apparatus
US4201170A (en) * 1978-07-31 1980-05-06 Stanadyne, Inc. Fuel injection pump with positive displacement delivery valve having two port areas opened according to fuel flow rate
US5207202A (en) * 1990-04-17 1993-05-04 Lucas Industries Public Limited Company Fuel pumping apparatus

Also Published As

Publication number Publication date
DE2425361C3 (de) 1979-02-22
DE2425361A1 (de) 1974-12-19
FR2230871B1 (fr) 1976-12-24
GB1465903A (en) 1977-03-02
FR2230871A1 (fr) 1974-12-20
JPS5042223A (fr) 1975-04-17
DE2425361B2 (de) 1978-06-15
IT1013226B (it) 1977-03-30
JPS5743734B2 (fr) 1982-09-17

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