US1850532A - Carburetor and the like - Google Patents

Carburetor and the like Download PDF

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Publication number
US1850532A
US1850532A US375713A US37571329A US1850532A US 1850532 A US1850532 A US 1850532A US 375713 A US375713 A US 375713A US 37571329 A US37571329 A US 37571329A US 1850532 A US1850532 A US 1850532A
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US
United States
Prior art keywords
nozzle
passage
capillary
liquid
mixtures
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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US375713A
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English (en)
Inventor
Chambers Edward Theodore
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1850532A publication Critical patent/US1850532A/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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • F02M19/03—Fuel atomising nozzles; Arrangement of emulsifying air conduits
    • 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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • 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
    • F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
    • F02M19/02—Metering-orifices, e.g. variable in diameter
    • F02M19/0228—Ring nozzles
    • 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
    • F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
    • F02M7/06—Means for enriching charge on sudden air throttle opening, i.e. at acceleration, e.g. storage means in passage way system
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/39—Liquid feeding nozzles

Definitions

  • This invention relates to the production of mixtures of liquids and gases by the use of an inverted nozzle subjected to the depression caused by a flow of gas. It has already been proposed in such cases to use a knife edged capillary nozzle of annular or multiple form over which it was suggested a head of liquid exactly balancing' the capillary and surface tension effects should be maintained.
  • the head of liquid above a capillary nozzle is made less than that ⁇ required to balance the capillary and surface tension effects by a considerable margin. This ensures stabilityin I5 practical operation where variation in specific gravity, of the liquid vibratiomtilting, slight variations in thickness or level of the nozzle at different pointsand other unavoidable departures from ideal conditions cause excessive flow, and leakage when the apparatus is not in use.
  • the delivery through the Capillary nozzle is controlled by a restriction in the liquid conduit above the nozzle, while the area of cross section of the nozzle is made larger than the 'area of the largest restriction it is intendedto use in a given apparatus.
  • a small bore nozzle must be used and in general its cross section will be too small; I therefore provide a series ofv nozzles, or preferably a nozzle of elongated section, for eX- amplean annular nozzle.
  • the provision of a separate restriction for controlling delivery has the great practical advantage that the restriction can be changed without affecting the capillary nozzle and therewith the capillaryk head and therefore ⁇ without the need for delicate adjustments in level.
  • the invention can be applied to any apparatus where mixtures of gas and liquid are require-d, for eXample blow lamps, and oil fuel vaporizers or atomizers, while its application to one preferred embodiment of carburetor for internal combustion engines is described in detail below, with reference to Figure 1 ofthe accompanying drawings in which Figure l shows the carburetor in lonlll) gitudinal section g, while Figures 2 and 3 are detail views of the throttle valve.
  • the body l of the carburetor may advantageously be in one piece with the float chamber 2, the petrol level being maintained at 3 by any usual float and valve mechanism.
  • a central fixed sleeve l projects upwards from the top of the chamber or Venturi passage 5 into the space 20 which communicates with the float chamber, being for example screwed in on to a packing washer 17.
  • Within the sleeve 4 fits the nozzle which is preferably made up of two parts.
  • the outer part comprises a sleeve 6 screwing into the sleeve 4 its walls at the lower end being made thin or sloped offV to a knifeedge as may be more convenient.
  • a packing washer is provided at 18.
  • the sleeves 4C and 6 can if desired be made in one piece.
  • annular passage 9 thus formed is of capillary dimensions radially but its total area of cross section is greater' than a. constricted passage l0 which actually controls the flow and which is formed in a largerV passage 16.
  • the radial dimension of the passage 9 and the shape of the lower edges of the members 6 and 7 is such that the head necessary to overcome the capillary and surface tension effects is considerably greater than the distance of the petrol level 3 above the lower edge of the nozzle.
  • the inner member 7 is shaped so that an annular passage 11 is formed by which the fuel coming through the passage 10 has access to the capillary passage all round, this passage l1 forming a fuel reserve which comes into action in the event of a sudden demand such as occurs when the throttle is rapidly opened.
  • the upperV edges of the sleeve 6 and inner member 7 are above the lever 3 and a siphon cap l2 is provided dipping below the level of petrol in the space 20 so that petrol cannot reach the nozzle until the engine suction causes the Siphon t0 ll.
  • This arrangement is an added lprotection against leakage whenthe engine is not running.
  • a butterfly throttle 13 is pivoted in that of the nozzle axis.
  • portion ofV the venturior choke passage having the smallest effective cross sectional area, beneath the nozzle and advantageously with its spindle axis 14 slightly on the engine side
  • the nozzle exit is some distance above the top of the passage 5 and the outlet is provided with a baile 15 open on the engine side only. .y l
  • nozzle described enables the constricted passage 10 to be changed with ease and so long as the diameter of the lower part of the inner member 7 is the same, the capillary effect is unchanged.
  • the lower diameter of the inner member mayhowever be changed to vary the capillary effect if y for fuel and one remote from the nozzle for the float chamber.
  • f groove 24 is inposition to provide maximum flow. By screwing these screws out more or less the respective passages can be decreased and finallyV cut rightl off when the groove passes beyond the edge of thepassage.
  • the compressed air passing to the jet may pass through a valve of definite proportions'and weight and part of the air on the supply side of this valve may be led to The difference in presplyy pipe Visv thus available for exertion upon the liquid, butin accordance with the invention it mustbe less than the head due to the capillary and surface tension effects.
  • an outer nozzle member having a thin walled parallel sleeve at one end and an inner nozzle member having a thin walled parallel sleeve at one end of greater length than the sleeve of said outer member, said inner member being mounted in said outer member so that the end of its sleeve stands flush with the end of the sleeve of said outer member and so that an annular capillary passage is formed leading from an annular reservoir, said inner member having a restricted passage of smaller area than that of the capillary passage formed in it communicating withy the reservoir.
  • AIn apparatus for the production of mixtures of liquids and gases the combination of an inverted capillary nozzle, means for maintaining a supply of liquid at a constant level, and a conduit leading from said constant level supply of liquid to said nozzle, said conduit having a restriction therein of smaller area than the cross section of said nozzle and having no inlets or outlets other than'said restriction and nozzle.
  • an inverted capillary nozzle In apparatus for the production of mixtures of liquids and gases, the combination of an inverted capillary nozzle, means 'or maintaining a supply of liquid at a constant level above said nozzle by an amount less than that required to balance the capillary and surface tension eii'ects by a considerable margin, and a conduit leading from said constant level supply of liquid to said nozzle, said conduit having a restriction therein of smaller area than the cross section of said nozzle and having no inlets or out-V lets other than said restriction and nozzle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nozzles (AREA)
US375713A 1928-07-03 1929-07-03 Carburetor and the like Expired - Lifetime US1850532A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1850532X 1928-07-03

Publications (1)

Publication Number Publication Date
US1850532A true US1850532A (en) 1932-03-22

Family

ID=10891941

Family Applications (1)

Application Number Title Priority Date Filing Date
US375713A Expired - Lifetime US1850532A (en) 1928-07-03 1929-07-03 Carburetor and the like

Country Status (3)

Country Link
US (1) US1850532A (en, 2012)
BE (1) BE362006A (en, 2012)
NL (1) NL26023C (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687710A (en) * 1948-11-15 1954-08-31 John T Rauen Carburetor
US2711886A (en) * 1951-06-12 1955-06-28 Carburation L Automobile Et L Downdraught carburetors

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687710A (en) * 1948-11-15 1954-08-31 John T Rauen Carburetor
US2711886A (en) * 1951-06-12 1955-06-28 Carburation L Automobile Et L Downdraught carburetors

Also Published As

Publication number Publication date
BE362006A (en, 2012)
NL26023C (en, 2012)

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