USRE21610E - Carburetor - Google Patents
Carburetor Download PDFInfo
- Publication number
- USRE21610E USRE21610E US21610DE USRE21610E US RE21610 E USRE21610 E US RE21610E US 21610D E US21610D E US 21610DE US RE21610 E USRE21610 E US RE21610E
- Authority
- US
- United States
- Prior art keywords
- metering
- pin
- piston
- fuel
- 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
Links
- 239000000446 fuel Substances 0.000 description 12
- 239000000203 mixture Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Images
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
- F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
- F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
- F02M7/18—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves with means for controlling cross-sectional area of fuel-metering orifice
-
- 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
- F02M19/04—Fuel-metering pins or needles
-
- 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
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20006—Resilient connections
Definitions
- This invention relates to carburetors for internal combustion engines and consists particularly in novel m'eans for striilizing the fuel metering characteristics thereof.
- a well known form of automotive carburetor utilizes a stepped or tapered metering pin associated with the mainy calibrated fuel'metering orifice in the fuel bowl in such a manner as to vary the effective cross sectional area of the' orlflce to supply a richer or leaner fuel and air mixture -according to the demands of the engine.
- This metering pin may be moved axiallypwith the throttle valve so as to Ireduce the restricting effect upon the metering orifice as the throttle valve is opened, or it may be controlled by a suction device in a manner to increase the open portion of the metering orifice when the suction in the mixture conduit drops.
- One object of the present invention is to provide novel means for maintaining the fuel metering pin in a stable relationship with its metering orifice.
- Another object is to provide means for stabilizing the relative position of a fuel metering pin, which means is particularly adaptable for use in carburetors in which the pin Ais controlled by a suction piston or other suction controlled means.
- Fig. 1 is a side view buretor embodying the invention.
- Fig. 2 is a detail horizontal section taken on the corresponding section line of Fig. 1.
- Fig. 3 is a detail vertical section taken substantially on the corresponding section line of Fig. 1.
- Fig. 4 is a perspective view showing a part of the structure in Fig. 1.
- Fig. 5 is a detail view, partly sectioned and v partly in perspective, illustrating a modification and Fig. 6 is a perspective view showing a modified detail asin Fig. 5.
- the carburetor in Fig. 1 comprises a downdraft partly sectioned of a car- (Cl. zei-69)' is supplied to the mixture conduit through ay main nozzle 9 opening into the throat portion of the smallest venturi 2 and communicating with the fuel bowl through a calibrated metering orifice member I0.
- Fuel for idling and low speed operation is supplied through a. passage, shown in part at I I, opening into the mixture conduit through a port I2 adjacent the edge of the throttle valve when closed.
- a cylinder or chamber I3 communicating through a passage Il with opening I5 into the mixturev conduit posterior to the throttle.
- a piston I6 slidingable within chamber I3 is a piston I6 having an elongated rod I1 projecting thereabove through cover I8 of the fuel bowl and having at its upper portion a laterally offset arm I9 pinned as at 20 to a metering pin ⁇ 2I having a stepped lower portion 22 extending into metering orifice member I 0 for varying the effective cross-sectional area.
- ⁇ pair of ribs or wings 23 project laterally from the portion of piston rod I1 Within chamber I3 and are slidable within slots 24 (Fig. 2) to prevent rotation of piston rod l1 and also guide the rod and pin 2l in their longitudinal movements. Due to the lateral offsetting of the actuating rod I1 from the metering pin, this guidingstructure has the effect of maintaining the metering pin substantially uniformly positioned transversely of the metering orifice.
- elongated piston rod member Ila projecting above suction controlled piston Ia has a pair of laterally offset arms 25 for carrying a pair of metering pins 2B, this arrangement being adapted for use in a dual carburetor having a pair of calibrated metering orlce members inthe fuel bowl.
- Guiding structure Il formed on air inlet horn la slidably receives a closely fitting portion 21 on the upper part of the piston rod for preventing rotation of the rod and maintaining the metering pins uniformly positioned relative to the metering horrs.
- a spring 20 in the suction chamber constantly urges piston lia upwardly of the metering pin into operative relationwith orifice member II to provide a proper mixture when the suction posterior ⁇ to the throttle drops below a predetermined value, say three inches of mercury. At other times the metering pin will be drawn down so as to bring a larger portion thereof into the ymetering orifice to provide an economical mixture for nox'n'ial,V part throttle operation.
- a mixing conduit a part having acallbrated fuelmetering orifice spaced transversely from the wall of said conduit, a guide opening co-axially arranged with respect to said metering orifice, a metering pin having a reduced lower extremity normally extending into saidv orifice, a. cylindrical chamber adjacent,
- said conduit communicating at its lower portion with suction in said conduit, a piston in said chamber, a spring arranged in said cylindrical. chamber between they piston and the lower end l ⁇ whereby' vsaid metering pin is restrained at all times from disalignmentwith said'orice dueto pivotal movement with respect to the wall forming the guide opening.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Description
oct 29, 1940. F, w, CLOEDY Er AL Re. 21,610
GARBURETOR Original Filed Jan. 6, 1938 Y me Reasued Oct. 29a, 1,940
UNITED sTATEs cAnnUnE'ron Frederick vW. Clocdy, St. Louis, and Harold A. Carlson, University City, Mo., assignors to Carter Carburetor Corporation, St. Louis, Mo., a corporation of Delaware Original No. 2,191,905, dated February 27, 1940,
Serial No. 183,604, January 6, 1938. Application for reissue May 25, 1940, Serial No. 331,282
2 Claims.
This invention relates to carburetors for internal combustion engines and consists particularly in novel m'eans for striilizing the fuel metering characteristics thereof.
A well known form of automotive carburetor utilizes a stepped or tapered metering pin associated with the mainy calibrated fuel'metering orifice in the fuel bowl in such a manner as to vary the effective cross sectional area of the' orlflce to supply a richer or leaner fuel and air mixture -according to the demands of the engine. This metering pin may be moved axiallypwith the throttle valve so as to Ireduce the restricting effect upon the metering orifice as the throttle valve is opened, or it may be controlled by a suction device in a manner to increase the open portion of the metering orifice when the suction in the mixture conduit drops. It has been found that the concentricity or eccentricity of the metering pin relative to the metering oriilce has a substantial eil'ect upon the fuel metered therethrough and, accordingly, means should be provided for maintaining the relative position of the pin substantially uniform in this respect. One means of accomplishing this result is illustrated and claimed in a United States Patent No. 1,961,747, issued in the name of William M. Ewart.
One object of the present invention is to provide novel means for maintaining the fuel metering pin in a stable relationship with its metering orifice.
Another object is to provide means for stabilizing the relative position of a fuel metering pin, which means is particularly adaptable for use in carburetors in which the pin Ais controlled by a suction piston or other suction controlled means.
'Ihese objects and other more detailed objects hereafter appearing are attained substantially by the structure illustrated in the accompanying drawing in which Fig. 1 is a side view buretor embodying the invention.
Fig. 2 is a detail horizontal section taken on the corresponding section line of Fig. 1.
Fig. 3 is a detail vertical section taken substantially on the corresponding section line of Fig. 1.
Fig. 4 is a perspective view showing a part of the structure in Fig. 1.
Fig. 5 is a detail view, partly sectioned and v partly in perspective, illustrating a modification and Fig. 6 is a perspective view showing a modified detail asin Fig. 5.
The carburetor in Fig. 1 comprises a downdraft partly sectioned of a car- (Cl. zei-69)' is supplied to the mixture conduit through ay main nozzle 9 opening into the throat portion of the smallest venturi 2 and communicating with the fuel bowl through a calibrated metering orifice member I0. Fuel for idling and low speed operation is supplied through a. passage, shown in part at I I, opening into the mixture conduit through a port I2 adjacent the edge of the throttle valve when closed.
'Formed in the wall of the mixture conduit is a cylinder or chamber I3 communicating through a passage Il with opening I5 into the mixturev conduit posterior to the throttle. Slidable within chamber I3 is a piston I6 having an elongated rod I1 projecting thereabove through cover I8 of the fuel bowl and having at its upper portion a laterally offset arm I9 pinned as at 20 to a metering pin`2I having a stepped lower portion 22 extending into metering orifice member I 0 for varying the effective cross-sectional area. thereof. A
`pair of ribs or wings 23 project laterally from the portion of piston rod I1 Within chamber I3 and are slidable within slots 24 (Fig. 2) to prevent rotation of piston rod l1 and also guide the rod and pin 2l in their longitudinal movements. Due to the lateral offsetting of the actuating rod I1 from the metering pin, this guidingstructure has the effect of maintaining the metering pin substantially uniformly positioned transversely of the metering orifice.
` In Figs. 5 and 6, elongated piston rod member Ila projecting above suction controlled piston Ia has a pair of laterally offset arms 25 for carrying a pair of metering pins 2B, this arrangement being adapted for use in a dual carburetor having a pair of calibrated metering orlce members inthe fuel bowl. Guiding structure Il formed on air inlet horn la slidably receives a closely fitting portion 21 on the upper part of the piston rod for preventing rotation of the rod and maintaining the metering pins uniformly positioned relative to the metering orices.
In both forms, a spring 20 in the suction chamber constantly urges piston lia upwardly of the metering pin into operative relationwith orifice member II to provide a proper mixture when the suction posterior `to the throttle drops below a predetermined value, say three inches of mercury. At other times the metering pin will be drawn down so as to bring a larger portion thereof into the ymetering orifice to provide an economical mixture for nox'n'ial,V part throttle operation. Y
The general features of the carburetor shown, with the exception of the fuel metering mechanism, are well known in the art and do not consaid chamber, a spring arrangedin said cyiindrical`chamber between the piston and the'lower end of said chamber, a piston rod projecting upwardly from said piston and having a :laterally 'oifset portion forming a mounting vfor 'said me- ,tering pin for moving the same parallel to thei/ axisv of said cylinder to vary the effective crosssectional area of said oriiice, non-circular guide means on the wall of said conduit adjacent said piston rod, said piston rod having a non-circular elongated portion extending laterally therefrom maybecalibratedtomovethesmallestpob' and ntting said guide means to prevent rotation of the rod so as to maintain uniform positioning. of said pin mounting .transversely of the axis of said orice, whereby the pin is re-` strained at all `times from misalignment with said orice due to pivotal movement with respect to the wall forming the guide opening.'
2. In a carburetor, a mixing conduit. a part having acallbrated fuelmetering orifice spaced transversely from the wall of said conduit, a guide opening co-axially arranged with respect to said metering orifice, a metering pin having a reduced lower extremity normally extending into saidv orifice, a. cylindrical chamber adjacent,
said conduit communicating at its lower portion with suction in said conduit, a piston in said chamber, a spring arranged in said cylindrical. chamber between they piston and the lower end l\whereby' vsaid metering pin is restrained at all times from disalignmentwith said'orice dueto pivotal movement with respect to the wall forming the guide opening.`l
- FREDERICK W. CLOEDY.
HAROLD A. CARLSON.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US661648A US1961747A (en) | 1933-03-20 | 1933-03-20 | Carburetor |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE21610E true USRE21610E (en) | 1940-10-29 |
Family
ID=24654491
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US21610D Expired USRE21610E (en) | 1933-03-20 | Carburetor | |
US661648A Expired - Lifetime US1961747A (en) | 1933-03-20 | 1933-03-20 | Carburetor |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US661648A Expired - Lifetime US1961747A (en) | 1933-03-20 | 1933-03-20 | Carburetor |
Country Status (1)
Country | Link |
---|---|
US (2) | US1961747A (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2591090A (en) * | 1947-02-12 | 1952-04-01 | Carter Carburetor Corp | Metering pin |
US2569147A (en) * | 1947-03-04 | 1951-09-25 | Carter Carburetor Corp | Metering rod support |
US2936789A (en) * | 1955-09-30 | 1960-05-17 | Acf Ind Inc | Metering rod biasing support |
US2965373A (en) * | 1958-04-28 | 1960-12-20 | Thompson Ramo Wooldridge Inc | Leveling valve |
DE1277629B (en) * | 1959-09-08 | 1968-09-12 | Acf Ind Inc | Carburettors for internal combustion engines |
DE1116472B (en) * | 1960-10-01 | 1961-11-02 | Johann Wehner | Floatless carburetor |
US3222039A (en) * | 1963-02-15 | 1965-12-07 | Acf Ind Inc | Carburetor |
US4025589A (en) * | 1975-09-02 | 1977-05-24 | Acf Industries, Incorporated | Metering rod support for carburetor |
US4034029A (en) * | 1976-07-19 | 1977-07-05 | Acf Industries, Incorporated | Metering rod control for an air valve carburetor |
US4366832A (en) * | 1981-01-16 | 1983-01-04 | Sentry Equipment Corporation | Self-cleaning variable pressure reducing element |
-
0
- US US21610D patent/USRE21610E/en not_active Expired
-
1933
- 1933-03-20 US US661648A patent/US1961747A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US1961747A (en) | 1934-06-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3322408A (en) | Carburetor | |
USRE21610E (en) | Carburetor | |
US2394663A (en) | Carburetor device | |
US2477481A (en) | Antidetonating device | |
US2402208A (en) | Deicing valve | |
US2255296A (en) | Carburetor nozzle | |
US2407535A (en) | Carburetor | |
US2296697A (en) | Carburetor | |
US2777678A (en) | Carburetor | |
US3214150A (en) | Carburetor | |
US2407534A (en) | Carburetor | |
US2418011A (en) | Antipercolator structure for carburetors | |
US2291418A (en) | Carburetor | |
US2621030A (en) | Carburetor nozzle system | |
US2191905A (en) | Carburetor | |
US2563096A (en) | Carburetor | |
US2261794A (en) | Carburetor | |
US3279767A (en) | Carburetor having fuel and air flow control means | |
US2187885A (en) | Carburetor | |
US2209511A (en) | Carburetor | |
US2410564A (en) | Nonicing carburetor | |
US2554660A (en) | Carburetor | |
GB905580A (en) | Carburetor for internal combustion engines | |
US1999334A (en) | Carburetor | |
US2362145A (en) | Carburetor for internal-combustion engines |