US1510293A

US1510293A - Carburetor

Info

Publication number: US1510293A
Application number: US412428A
Authority: US
Inventors: Baverey Francois
Original assignee: Societe du Carburateur Zenith SA
Current assignee: Societe du Carburateur Zenith SA
Priority date: 1920-09-24
Filing date: 1920-09-24
Publication date: 1924-09-30
Anticipated expiration: 1941-09-30

Description

ept. 30 1924.

F. BAVEREY CARBURETOR Filed Sent. 24. 1920 3 Sheets-Sheet l apt. 30.1924. smzw F BAVEREY CARBURETOR Filed Sept. 24. 1920 3 Sheets-Sheet 2 ept. 30 1924.

F. BAVEREY CARBURETOH LSEQZQB Filed Sept. 24. 1920 3 Sheets-Sheet 5 esteem se t; a, rare.

are

;r are FRANQDIS BA'VEREY, OF LYON, FRANCE, ASSIGNOB T SOCIETE DU GABBUMTEUR 2mm, 0! LYON, FRANCE, A CORPORATION OF FMNCE.

GABBURETOR.

Application filled Eeptembcr 2 1, 1920. erial We. emcee.

slow speed running or idling mixture, and

temporary enrichment of such mixture for startmg purposes.

is. to provide an attachment for the atmos- 29 pheric wells of carburetors by means of which the idling or slow speed jet 'ied thereby may be caused to simply a combustible mixture having a greater quantity of fuel in proportion to the air, without varying the supply oi": air to the atmospheric well.

The foregoing and other objects, together with their attendant advantages, will be apparent as the invention becomes better un derstood, by reference to the accompanying specification and drawings forming a part thereof, it beingv premised that changes may be made in the various details and the manner of operation, within the scope of the appended claims, without departing from the spirit of the invention.

Figure 1 is a diagrammatic view of a construction in accordance with the present invention.

Figure 2 is a similar view oi a slightly modified embodiment of my invention.

Figure 3 is a vertical sectional view through an atmospheric well having my improved regulating device applied thereto.

Figure 4 is a side elevation of the construction illustrated in Figure 3 removed irolpi the gvell. a F

igure is a view, correspon ing to igure 3, of a slightly modified form of my invention.

Figure 6 is a view, corrmponding Figure g, of the modification illustrated in Figure Figure 7 is a detail sectional view on an enlarged scale of the adjustin valve, and

Figure 8 is a vertical sectional view through a commercial carburetor constructed in accordance with my invention.

In my earlier Patent No. 1,186,371, of June 6, 1916, there is disclosed an improvement in adjusting devices for carburetors comprising means for varying the amount of air to the main well. My present invention has relation generally to a construction of this nature but difibring therefrom in that the supply ofair to the main well is not changed and only the slow speed mixture made richer to "facilitate starting. A further object of the present invention Referring more particularly to the drawings, there is illustrated a carburetor comprising a constant level chamber 1 having a suitable connection to a main feed jet 2 terminating adjacent the point of maximum restriction in the venturi 3 of the suction pipe l. Surrounding the main jet 2 is a compensating jet 5 receiving its supply of fuel from an atmospheric well 6 having an air opening 7 to the atmos here. The suction pipe 4 has the usual a1r inlet 8 and is' controlled by a suitable throttle valve 9. 1n

general, the details of construction, as described, are shown in my Patent 1,188,390, of June 27, 1916.

In the embodiment of my invention illustrated in Figure 1, the atmospheric well 6 has extending thereinto a tube 10 having its lower open end extending into the fuel within the well and its upper and constructed to form a slow speed nozzle 11. speed nozzle is positioned within a chamber 12 into which extends one end of a slow

speed emulsion conduit

13, 14 opening through the-wall of the suction tadjacent the throttle valve 9, an avmg a branch 15 leadin to my im roved regulating device R to e describe in detail hereinafter. The chamber 12 has air openings '16 formed therein which are made small enough so as not to be suficient to maintain atmospheric pressure in the interior. In

' of my invention the slow speed The slow nozzle is above the fuel level within the at- -mospheric well as disclosed in my Patent -level,-a calibrated openin 17 forming a determined supply for idling or slow speed running. Within the branch 15 there is a needle valve 18 having a seat l9-formedein the branch 15' of the conduit intermediate its point of union with the, main conduit and the regulating device R. This needle valve controls the maximum amount of-air which can pass into the branch 14 even though the device R is in wide open position, as will be clearly pointed out hereinafter.

A commercial embodiment of the diagrammatic construction of Figure 1 is illustrated in Figures 3' and 4 in which the tube 10 is screwed into the lower end of the easin 12 carried by a plug 20 screwed into an en arged chamber 21 formed in the upper end of the atmospheric well and communicating by the branch conduit 14 with the suction pipe 4. The portion of the'con- 'duit 13, as disclosed in Figure 1, which extends into the casing 12, is in the form of I a tube 22 vertically adjustable within the casing 12, and'communicating through openings 23 in said tube, and openings 23 in the plug 20 with the conduit 14.

The upper end of the chamber 21 is closed by a screw-threaded plug 24 having a tubular upwardly projecting portion 25 communicating with the interior of the chamber 21 through an opening 26. Around the tubular portion 25 is a split bracket 27 clamped in position by a tightening screw 28 and held against removal by engaging a shoulder 29 on the tubular portion 25.

Slidably mounted within the tubular portion 25 is a needle valve 30 adapted to control the opening 26 to the chamber 21. Surrounding the needle valve 30 is a compress1 on spring 31 partially enclosed by a hollow head 32 secured to the needle valve and provided with openings 33 to the atmosphere. For moving the 'needle valve 30 against the action of the spring 31 to close V 1 the opening 26, there is provided a cam 34 mounted on the shaft 35 in the bracket 27 and adapted to be operated by a lever 36. The open position of the needle valve 30 1s controlle by an adjustable stop screw 37 adapted to engage a stop 38 formed by the bracket 27 and thereby regulate the maxi- In adjusting the carburetor for use, the

stop screw 37 is moved until the proper amount of air is permitted to pass through the opening 26 to produce an accurately proportioned vmixture for idling or slow running speeds when themotor has reached its normal working temperature. In starting, or when the engine is cold, the supply of. air through the o ening 26 is entirely out off or partly dimmished to enrich the slow speed mixture to facilitate starting. This is accomplished by the action of the cam 34 on the needle valve 30. It will be apparent that this is accomplished without eh'an ing the main air supp y to the atmospheric well 6, so that the ad ustment of the compensating nozzle is not destroyed 'or altered. I

v In Figures 5., 6 and 8, there is illustrated a commercial embodiment of the diagrammatic construction illustrated in Figure 2, with theneedle. valve 18 replaced by the stop screw before described, in connection with Figures 3 and 4. In these figures of the drawings, parts corresponding to parts already described are represented by the same reference characters primed as in Figure 2. As so constructed, the conduit 13' is carried by a plug 24, held in positionby a set screw 40 and carrying a regulating de' vice'R', as previouslyidescribed in detail. The plug 24 has an opening 23' formed therein and communicating with the conduit 14 leading to thethrottle valve. The operation of this type of control is the same as that illustrated in Figures 1, 3 and 4 of the drawings and need not be described in detail.

The advantages of the resent invention arise from the provision 0 means for easily and quickly enriching the slow speed mixture without changing the air supply to the atmospheric well.

I claim:

1. In a carburetor, a constant level chamber, a suction pipe havingI a fuel nozzle therein communicating wit said chamber, a throttle valve in said pipe, an atmospheric well open to the atmosphere, a conduit extending from the well and opening into the suction pipe adjacent the throttle and constituting a slow speed feed device, means for feeding an emulsion of fuel and air from the well to the conduit, regmlable means set in an open position for determining the maximum supply of air to the conduit, and means for temporarily decreasin the supply of air to the conduit without e footing the air supply to the well, substantially as described.

2. In a carburetor, an atmospheric well maoaoe open to the atmosphere, means for feeding the flow of air through said valve controlled W fuel to the well, a slow s feeding deinlet, substantially as described.

vice adapted to receive fuel from the well, In testimony whereof, I have hereunto set a plurality of air inlets for said slow speed my hand.

feeding device, a valve adapted to be adjusted in its open position for regulating the maximum amount of air which can pass through one of said inlets, and a manually operable means for temporarily changing FRANQOIS BAVEREY, Witnesses:

JULIAN KEMBLE Seam, GRADE Sonnrrr.