US2002134A - Fuel spray injection for internal combustion engines - Google Patents

Fuel spray injection for internal combustion engines Download PDF

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Publication number
US2002134A
US2002134A US646225A US64622532A US2002134A US 2002134 A US2002134 A US 2002134A US 646225 A US646225 A US 646225A US 64622532 A US64622532 A US 64622532A US 2002134 A US2002134 A US 2002134A
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United States
Prior art keywords
fuel
internal combustion
combustion engines
spray
needles
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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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US646225A
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English (en)
Inventor
Baj Alessandro
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Individual
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Individual
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Publication of US2002134A publication Critical patent/US2002134A/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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/08—Injectors peculiar thereto
    • F02M45/086—Having more than one injection-valve controlling discharge orifices
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/44—Valves, e.g. injectors, with valve bodies arranged side-by-side

Definitions

  • the present invention is a novel apparatus or device for reducing fuel to spray in internal combustion engines working by injection.
  • it can be said that, in internal combustion engines, for every speed and load, there corresponds a type of fuel spray which gives the maximum result.
  • the type 4of spray depends on the duration of the injection, on the diameter of the minute drops of the sprayed fuel and on their velocity.
  • the load, the duration of the injection (computed as the angle of movement of the lever) and the quantity of the fuel injected, are directly related to each other; having then, established a ru- ⁇ .e governing the introduction of the fuel at different speeds the diameter of the drops and their velocity would depend on the speed and on the manner in which the reduction to spray is performed.
  • the best result depends on the smallnessof the diameter of the drops, if one considers that the time taken by the drops to burn depends on their size; but this time depends also on their velocity, (that is on the quantity of air through which they travel and with ⁇ which they come in Contact) therefore the time and also the speed with the time, are related to the diameter and .the Velocity of thel drops.
  • the diameter of the drops of spray depends on the pressure and on the diameter of the holes, while their velocity depends on the diameter and number of the hoes and on the quantity of fuel injected per cycle; that is, on' the fuel load.
  • the device mentioned comprises a sprayer with many holes and with many needles having limited travel.
  • the needles Work at different pressures since the counter forces or resilient means pressing on the needles are diierent. ⁇ When the needles rise they allow the fuel to pass through the injection holes, reducing itself to fine spray; these holes may be one or more in number for each needle.
  • the pressure of the fuel rises until it succeeds in raising the rst needle, which has ⁇ a limit to its rising movement.
  • the fuel pressure further rises until it makes the second needle work, ⁇ this also being combined with a member limiting its travel, and soon to the last needle.
  • Fig. 1 is a longitudinal section of ing device.
  • Fig. 2 is a transverse section along line 2-2 of Fig. 1.
  • Fig. 3 is another transverse section along line 3-3 of Fig. 1.
  • Fig. 4 is a projection of the extremity of the actual true sprayer.
  • the device has the usual body I, made to screw into. the head of the engine cylinder by the threaded part 2. l
  • Three longitudinal holes are bored in the body l, ,of which one, 3, is designedto receive and 50 conduct the fuel arriving by inlet opening l while the other two serve as ways for two needlevalves or rods 5 and 6.
  • the channel 3 leads and delivers into the cavity or fuel chamber 'l from which take off the small channels 8 and 9 65 the spraythe inner ends of which-constitute valve seats normally closed and controlled by the tapered ends 5a and 6a of the needle-valves 5 and 6.
  • the channel 8 opens into a small annular chamber I from which small channels II take 0E which lead to a given number of spray holes I2 (in the example given there are three).
  • the channel 9 opens into another small chamber I3, shown as central, from which the small channels I4 take ofi' to a separate set of spraying holes I5 (also three shown in the example).
  • the two needle-valves or rods 5 and 6 are differently loaded or pressed to their seats; in the example this pressing is by means of corresponding adjustable springs I8 and I1 set in hollow extensions I8 and I9 of the body I.
  • These springs .act on the rods 5 and 8 through bell-crank levers 20 and 2l having central pivots, and inward and upward arms and whose contact ends or extremities 20a and 2Ia press on the upper extremities or contact ends of the needles.
  • the bell crank inward arms and therefore the needles are controlled in the amount of their rise by stops or limiting members, these being in the .exampleftwo adjustable screw bolts 22 and 23.
  • the springs press upon the upward arms of the bell cranks, and screwed caps 24 and 25 serve to regulate, in an obvious manner, the compression or load on the springs and hence the resilient resistance or force pressing the needles 5 and 6 to a position closing the corresponding channels I and 9.
  • Each valve may control many openings for the spraying of fuel.
  • valve stop devices 22 and 23 may comprise springs or other cushioning means.
  • injection needle valves each normally closed by resilient or spring pressure but each adapted to be opened by increase of the liquid pressure of the fuel upon the valve and each delivering to the engine by one or more spray orifices; said injection apparatus characterized by a plurality of such injection valves consisting of separate needle rods spaced apart from each other to slide independently along spaced-apart ways to operate with independent actions, all of such valve needles being subject at all times to the same fuel pressure, but having their resilient closing means constructed differently to allow successive independent opening of the several valves as the huid-fuel pressure increases, and the several spaced-apart valve needles having separate stop means limiting the successive openings of each of the valve needles to a very short movement adequate for injection purposes when open and thereby affordingv independent instantaneous closing of the respective valves upon decrease of fuel pressure, and means for finely and independently adjusting thestop means for each of the valve needles to limit minutely and accurately the extent of opening of each ofthe valves.

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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)
US646225A 1931-12-09 1932-12-08 Fuel spray injection for internal combustion engines Expired - Lifetime US2002134A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT394588X 1931-12-09

Publications (1)

Publication Number Publication Date
US2002134A true US2002134A (en) 1935-05-21

Family

ID=11246216

Family Applications (1)

Application Number Title Priority Date Filing Date
US646225A Expired - Lifetime US2002134A (en) 1931-12-09 1932-12-08 Fuel spray injection for internal combustion engines

Country Status (4)

Country Link
US (1) US2002134A (de)
DE (1) DE615604C (de)
FR (1) FR746655A (de)
GB (1) GB394588A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450352A (en) * 1967-01-13 1969-06-17 Hartford Machine Screw Co Fuel injection nozzle and adjustable biasing means therefor
US3764076A (en) * 1971-04-29 1973-10-09 Bosch Gmbh Robert Fuel injection nozzle unit for internal combustion engines
US6422199B1 (en) * 1999-08-26 2002-07-23 Delphi Technologies, Inc. Fuel injector
US20060212272A1 (en) * 2003-12-12 2006-09-21 Bellsouth Intellectual Property Corporation Remote Generator Fuel Monitoring System
US20080142378A1 (en) * 2005-03-17 2008-06-19 Thibideau Todd J Holder for Personal Items
US7556017B2 (en) * 2006-03-31 2009-07-07 Caterpillar Inc. Twin needle valve dual mode injector
US20090292048A1 (en) * 2008-05-23 2009-11-26 Sabic Innovatives Plastics Ip B.V. Flame retardant laser direct structuring materials
US20100269783A1 (en) * 2005-03-09 2010-10-28 Carl-Anders Hergart Internal combustion engine and operating method therefor
US20140346254A1 (en) * 2014-08-07 2014-11-27 Caterpillar Inc. Fuel injector for gaseous injection

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE864481C (de) * 1941-12-12 1953-01-26 Daimler Benz Ag Mit mehreren Rueckschlagventilen versehene, offene Einspritzduese fuer Brennkraftmaschinen
DE3243175C2 (de) * 1982-11-23 1986-06-19 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Kraftstoff-Einspritzventil
DE3243176A1 (de) * 1982-11-23 1984-05-24 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Einspritzeinrichtung fuer alkoholkraftstoffe, insbesondere bei direkteinspritzenden dieselmotoren
DE3634962A1 (de) * 1986-10-14 1988-04-21 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung fuer brennkraftmaschinen, insbesondere fuer dieselmotoren

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450352A (en) * 1967-01-13 1969-06-17 Hartford Machine Screw Co Fuel injection nozzle and adjustable biasing means therefor
US3764076A (en) * 1971-04-29 1973-10-09 Bosch Gmbh Robert Fuel injection nozzle unit for internal combustion engines
US6422199B1 (en) * 1999-08-26 2002-07-23 Delphi Technologies, Inc. Fuel injector
US20060212272A1 (en) * 2003-12-12 2006-09-21 Bellsouth Intellectual Property Corporation Remote Generator Fuel Monitoring System
US20100269783A1 (en) * 2005-03-09 2010-10-28 Carl-Anders Hergart Internal combustion engine and operating method therefor
US8069835B2 (en) * 2005-03-09 2011-12-06 Caterpillar Inc. Internal combustion engine and operating method therefor
US20080142378A1 (en) * 2005-03-17 2008-06-19 Thibideau Todd J Holder for Personal Items
US7556017B2 (en) * 2006-03-31 2009-07-07 Caterpillar Inc. Twin needle valve dual mode injector
US20090292048A1 (en) * 2008-05-23 2009-11-26 Sabic Innovatives Plastics Ip B.V. Flame retardant laser direct structuring materials
US20140346254A1 (en) * 2014-08-07 2014-11-27 Caterpillar Inc. Fuel injector for gaseous injection

Also Published As

Publication number Publication date
GB394588A (en) 1933-06-29
FR746655A (fr) 1933-06-02
DE615604C (de) 1935-07-11

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