US3307491A - Fuel pump venting - Google Patents

Fuel pump venting Download PDF

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Publication number
US3307491A
US3307491A US472194A US47219465A US3307491A US 3307491 A US3307491 A US 3307491A US 472194 A US472194 A US 472194A US 47219465 A US47219465 A US 47219465A US 3307491 A US3307491 A US 3307491A
Authority
US
United States
Prior art keywords
fuel
pump
supply chamber
delivery
chamber
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
US472194A
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English (en)
Inventor
George D Wolff
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.)
Allis Chalmers Corp
Original Assignee
Allis Chalmers Corp
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 Allis Chalmers Corp filed Critical Allis Chalmers Corp
Priority to US472194A priority Critical patent/US3307491A/en
Priority to GB31057/66A priority patent/GB1111357A/en
Priority to FR69459A priority patent/FR1486760A/fr
Priority to SE09633/66A priority patent/SE336504B/xx
Priority to CH1028666A priority patent/CH505289A/fr
Priority to DEA53029A priority patent/DE1260866B/de
Application granted granted Critical
Publication of US3307491A publication Critical patent/US3307491A/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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/007—Venting means
    • 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
    • F02M41/10—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 pump pistons acting as the distributor
    • F02M41/12—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 pump pistons acting as the distributor the pistons rotating to act as the distributor
    • F02M41/123—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 pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
    • F02M41/125—Variably-timed valves controlling fuel passages
    • F02M41/126—Variably-timed valves controlling fuel passages valves being mechanically or electrically adjustable sleeves slidably mounted on rotary piston

Definitions

  • This invention relates to venting fuel injection pumps and particularly to means for removing entrapped air from the supply chamber of a fuel injection pump.
  • air may become entrapped in the supply chamber of the fuel injection pump. For instance, if the fuel tank becomes empty, air will be drawn into the fuel pump. Also, during the change of nozzles it is possible for air to enter the fuel pump.
  • fuel pumps have been provided with a vent screw which is removable with hand tools to effect venting of the pump. This is not convenient because the operator must leave his operators station to effect venting.
  • the supply chamber of a fuel pump be provided with a continuously open air vent. This type vent is effective in passing fluid as well as air, from the supply chamber to the fuel reservoir.
  • the continuously open vent arrangement has the disadvantage of reducing the supply chamber pressure at low pump speeds.
  • FIG. 1 is a top view of a pump incorporating this invention with parts broken away to shown details of consrtuction;
  • FIG. 2 is a side view of the pump shown in FIG. 1 also having parts broken away to show details;
  • FIG. 3 is a section view taken along the line IIIIII in FIG. 1;
  • FIG. 4 is a view showing the pump control member in a venting position
  • FIG. 5 is a schematic view showing control linkage between the operator station and the pump control member.
  • FIGS. 1 and 2 of the drawings I illustrate my invention in a distributor type fuel injection pump assembly which includes an injection pump 11 and governor 12.
  • the pump and governor are installed in a housing 13 made up of a pump section 14 in which pump 11 is incorporated and a governor section 16 in which the governor 12 is incorporated.
  • a wall 17 of pump section 14 divides the governor compartment or chamber 18 from a fuel supply chamber 19.
  • An engine driven pump drive shaft 21 reciprocates a pump plunger 22, in a bore 23 in the head portion 24 of the pump section of housing 13, by a cam 26 acting through tappet roller 27 and tappet cup 28-.
  • the pump plunger 22 is rotated by the drive shaft 21 through gear 31 on drive shaft 21, gear 32 connected for rotation with plunger 22 and gear cluster 33 which includes gears 34, 35.
  • Gears 31 and 35 constitute a supply pump which draws fuel from a reservoir 36 and delivers it to the supply chamber 19 by passage means, not shown.
  • the fuel supply chamber 19 is maintained at an intermediate pressure, such as 50 pounds per square inch, by a regulating valve 37 in wall 17. Excess fuel in the supply chamber 19 is spilled by regulating valve 37 to the governor compartment 18 from which it is returned to the reservoir 36 by way of exhaust port 39.
  • Plunger 22 of the illustrated pump has six pumping strokes during one revolution of the plunger and during the six pumping strokes a delivery port 46 in the plunger registers successively with the six delivery passages 47.
  • the delivery passages 47 are adapted for connection to injectors at the six cylinders of an engine on which the illustrated pump assembly may be installed.
  • the control sleeve 44 is shiftable axially and rotataby relative to the housing 13 by axial and rotative shifting, respectively, of a control members or rod 51.
  • the control rod 51 mounted in aligned bores 65, 67 in housing 13 for rotative and axial movement and has a pressure equalizing axial passage 70 placing cavity in fluid communication with governor chamber 18.
  • the distributor portion 56 of the plunger 22, which includes the delivery port 46, includes a recess 57 extending somewhat more than halfway circumferentially about the plunger and an axial groove 58 which connects recess 57 with the supply chamber 19.
  • the recess 57 and groove 58 are not connected to delivery port 46 but instead serve to connect the delivery passages 47 to the supply chamber during the major portion of the time that they are not in registry with the delivery port 46.
  • Air will become entrapped in the supply chamber 19 resulting in abnormal pump operation. Air may enter the supply chamber as a result of changing injectors and also as a result of running out of fuel during operation.
  • a vent be employed in an exterior supply chamber wall with a removable plug, such construction has necessitated the operator leaving the operators station and thus stopping operation of the equipment while he unscrewed the vent screw to exhaust entrapped air from the supply chamber.
  • I provide a venting system for the supply chamber wherein the supply chamber is connected to the low pressure governor chamber when the control rod 51 is moved to its fuel shutoff position.
  • a vent passage 64 is drilled between recess 66 and the bore 67 in housing 13 in which control rod 51 is mounted.
  • a flat 68 milled on control rod 51 provides a port and converts a portion 69 of the control rod 51 into a control valve.
  • the cylindrical outer surface of rod 51 blocks vent passage 64 thus preventing flow of fluid from supply chamber 19 to governor chamber 18 via the vent passage 64.
  • Flow through the vent passage 64- is permitted in the shutoff position (FIGS. 4 and 5) of rod 51 since the recess formed by flat 68 places vent passage 1 A conventional breather 80 permits escape of the air from reservoir 36.
  • the control rod 51 is manually operable by the operator at the control station 71, illustrated in FIG. 5, through a manually controlled push-pull rod 72 shiftable between pump idle (fuel delivery) and pump shutoff positions.
  • the governor mechanism In the pump idle position of the control rod 51, as illustrated in FIGS. 1, 2 and 3, the governor mechanism, not shown, is permitted to position the control rod 51 in response to changes in engine speed in a conventional manner.
  • a throttle control 73 is provided to change the governed engine speed by acting on the governor control linkage in a conventional manner.
  • the throttle control 73 and manual control for control rod 51 are shown schematically in FIG. 5.
  • a fuel injection pump for delivering fuel to an injector by way of a delivery passage comprising a housing having wall means defining a supply chamber for maintaining fuel at above atmospheric and substantially below injection pressures, and V a manually operable pump control rod for controlling fuel delivery of said injection pump shiftably disposed in said wall means and movable between a fuel shutoff position in which said supply chamber is vented to the exterior of said wall means independently of said delivery passage and a fuel delivery position in which said supply chamber is not vented to the exterior of said wall means.
  • a fuel pump of the type having a pump plunger reciprocable in a bore to pressurize fuel to an injection pressure, a supply chamber for receiving fuel from a supply pump and means maintaining fuel in the supply chamber at an intermediate pressure, means for venting said supply chamber including a passageway independent of said bore having one end in fluid communication with said supply chamber and adapted at its opposite end for fluid communication with a low pressure chamber, and
  • control valve disposed in controlling relation to said passageway and adapted for connection to a manually operated control element, said valve being shiftable by said control element from a first position in which fluid flow in said passageway is prevented to a second position in which fluid flow is permitted through said passageway from said supply chamber to said low pressure chamber.
  • a fuel pump of the type having a pump plunger reciprocable in a bore to pressurize fuel to an injection pressure, a supply chamber for receiving fuel from a supply pump and means maintaining fuel in the supply chamber at an intermediate pressure, the combination,
  • a passageway independent of said bore having one end in fluid communication with said supply chamber and adapted at its opposite end for fluid communication with a low pressure chamber
  • a manually operable pump control member for controlling pump delivery shiftably mounted on said pump for movement between fuel delivery and fuel shutoff positions and having a valve portion in fluid flow controlling relation to said passageway, said valve portion preventing fluid flow through said passageway when said control member is in said fuel delivery position and permitting fluid flow through said passageway from said supply chamber to said low pressure chamber when said control member is in said fuel shutoff position.
  • a fuel pump having a first zone for maintaining fuel at an intermediate pressure preparatory to delivery to a second zone where the fuel is pressurized to an injection pressure for delivery via delivery passages to injectors and a third zone adapted forconnection to a low pressure fuel reservoir, means for venting said first zone,
  • a valve for controlling flow of fluid through said passage including a shiftable valve member having a closed position in which fluid is prevented from flowing through said passage and an open position in which fluid is permitted to flow through said passage, and
  • manually operable means for selectively shifting said valve member between said positions.
  • valve member is a fuel control rod operable to control pump delivery.
  • control rod is shiftable axially between said open and closed positions.
  • a fuel pump comprising:
  • vent passage in said housing connected at one end to the top of said supply chamber and at its other end to said low pressure chamber
  • control means for adjusting the pump delivery including a control member shiftably mounted in said housing for movement between first and second positions and having a valve portion disposed in fluid flow controlling relation to said vent passage, said valve portion preventing fluid flow through said vent passage when said member is in said first position and permitting fluid flow through said vent passage when said member is in said second position.
  • a fuel pump comprising:
  • a delivery passage connected at least intermittently to said pumping chamber
  • vent passage in said housing connected at one end to the top of said supply chamber and at its other end to said low pressure chamber
  • a reciprocable control rod in said housing for adjusting the pump delivery including a valve portion in fluid controlling relation to said vent passage, said rod being shiftable to a pump delivery position in which fluid flow through said vent passage is.prevented and to a fuel shut-01f position in which fluid flow through said vent passage is permitted.
  • a fuel pump comprising:
  • a housing having a supply chamber for maintaining fuel at an intermediate pressure
  • a pump plunger reciprocably and rotatably mounted in said bore, said plunger having an inlet portion in said supply chamber and a distributor portion in said bore in fuel delivery flow controlling relation to said delivery passages,
  • control means for adjusting said sleeve relative to said housing including a control member shiftably mounted in said housing for movement between fuel delivery and fuel shutofi positions and having a valve portion preventing fluid flow from said supply chamber to said low pressure chamber when said member is in said fuel delivery position and permitting fluid flow from said supply chamber to said low pressure chamber when said member is in said fuel shutoff position.
  • a fuel pump comprising:
  • a pump plunger mounted in said bore having an inlet portion in said supply chamber and a distributor portion in said bore in fuel delivery flow controlling relation to said delivery passages,
  • control means for adjusting said sleeve relative to said housing ineluding'a control member shiftably mounted in said housing for movement between fuel delivery and fuel shutoff positions and having a valve portion in fluid controlling relation to said vent passage, said valve portion preventing fluid fiow from said supply chamber to said governor chamber through said vent passage when said member is in said fuel delivery position and said valve portion permitting fluid flow from said supply chamber to said governor chamber through said vent passage when said member is in said fuel shutoff position.

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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)
US472194A 1965-07-15 1965-07-15 Fuel pump venting Expired - Lifetime US3307491A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US472194A US3307491A (en) 1965-07-15 1965-07-15 Fuel pump venting
GB31057/66A GB1111357A (en) 1965-07-15 1966-07-11 Improved fuel injection pump
FR69459A FR1486760A (fr) 1965-07-15 1966-07-13 Perfectionnements aux pompes à injection
SE09633/66A SE336504B (fr) 1965-07-15 1966-07-14
CH1028666A CH505289A (fr) 1965-07-15 1966-07-15 Pompe d'injection de combustible
DEA53029A DE1260866B (de) 1965-07-15 1966-07-15 Vorrichtung zur Entlueftung der Brennstoffvorratskammer in einer Brennstoffeinspritzpumpe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US472194A US3307491A (en) 1965-07-15 1965-07-15 Fuel pump venting

Publications (1)

Publication Number Publication Date
US3307491A true US3307491A (en) 1967-03-07

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ID=23874550

Family Applications (1)

Application Number Title Priority Date Filing Date
US472194A Expired - Lifetime US3307491A (en) 1965-07-15 1965-07-15 Fuel pump venting

Country Status (5)

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US (1) US3307491A (fr)
CH (1) CH505289A (fr)
DE (1) DE1260866B (fr)
GB (1) GB1111357A (fr)
SE (1) SE336504B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3352245A (en) * 1965-12-09 1967-11-14 Allis Chalmers Mfg Co Fuel injection system
US3645648A (en) * 1968-08-23 1972-02-29 Johan H Graffman Hydraulic pulse generator
US4233002A (en) * 1978-05-09 1980-11-11 Benjamin Birenbaum Fuel injection system
US4310291A (en) * 1978-08-03 1982-01-12 Lucas Industries Limited Liquid fuel pumping apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2123950A (en) * 1936-05-04 1938-07-19 Emert J Lattner Hydraulic system control means
GB524542A (en) * 1938-03-08 1940-08-08 Daimler Benz Ag Improvements in and connected with the de-aeration or priming of fuel pumps
US2980092A (en) * 1957-07-01 1961-04-18 Allis Chalmers Mfg Co Fuel injection pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE695664C (de) * 1936-04-23 1940-08-30 Deckel Friedrich Entlueftungseinrichtung fuer den Saugraum von Einspritzpumpen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2123950A (en) * 1936-05-04 1938-07-19 Emert J Lattner Hydraulic system control means
GB524542A (en) * 1938-03-08 1940-08-08 Daimler Benz Ag Improvements in and connected with the de-aeration or priming of fuel pumps
US2980092A (en) * 1957-07-01 1961-04-18 Allis Chalmers Mfg Co Fuel injection pump

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3352245A (en) * 1965-12-09 1967-11-14 Allis Chalmers Mfg Co Fuel injection system
US3645648A (en) * 1968-08-23 1972-02-29 Johan H Graffman Hydraulic pulse generator
US4233002A (en) * 1978-05-09 1980-11-11 Benjamin Birenbaum Fuel injection system
US4310291A (en) * 1978-08-03 1982-01-12 Lucas Industries Limited Liquid fuel pumping apparatus

Also Published As

Publication number Publication date
DE1260866B (de) 1968-02-08
SE336504B (fr) 1971-07-05
CH505289A (fr) 1971-03-31
GB1111357A (en) 1968-04-24

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CONNECTICUT NATIONAL BANK THE, A NATIONAL BANKING

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329

Owner name: WOODS KATHLEEN D., AS TRUSTEE

Free format text: SECURITY INTEREST;ASSIGNOR:ALLIS-CHALMERS CORPORATION A DE CORP.;REEL/FRAME:004149/0001

Effective date: 19830329