US1839102A - Carburetor - Google Patents

Description

Dec. 29, 1931. J, B, KESSEL 1,839,102

CARBURETOR Filed Dec. 8, 1927 2 Sheets-Sheet l J. B. KESSEL Dec. 29, 1931.

CARBURETOR Filed DeC- 8, 1927 2 Sheets-Sheet 2 vline 3 3, Figure 1. v

Patented Dec. 29, 1931 UNITED STATES JOHANNES B. KESSEL, OF CHICAGO, ILLINOIS CARBURETOB Application filed ecember 8, 1927. Serial No. 238,576.

This invention relates to improvements in carburetors for carbureting and mixing air with-hydro-carbon liquid fuels, such as are employed in hydro-carbon or internal combustion engines, and one of the objects of the invention is to improve and simplify the construction of a carburetor of -this character,

`thereby reducing the cost of manufacture and at the same time provide a carburetor which will produce a maximum amount of power with a minimum amount of fuel.

To the attainment of these endsand the accomplishment of other new and useful objects as will appear, the invention consists in the features of novelty in substantially the construction, combination and arrangement of the several parts hereinafter more fully described and claimed and shown in the accompanying drawings illustrating this inven tion, and in which Figure 1 is a View partly in side elevation, partly broken away and partly in section of a carburetor of this character constructed in accordance with the principles of this in-l vention. A y

Figure 2 is a detail horizontal sectional view taken on line 2 2, Figure 1.

AFigure 3 is a detail sectional view'taken on Figure 4 is a detail sectional view taken on line 4 4, Figure y1.

Figure 5 is a detail sectional view taken on line 5 5, Figure 2.

Figure 6 is a detail view partly in elevationv and partly in'section, and as taken approxmately on the line 6 6, Figure 2.

Figure 7 is a perspective view of the diaphragm for controlling the movement of the control valve.

Figure 8 is a perspective view of a washer or member forlcontrolling the inlet of the fuel.

Figure 9 is a sectional view taken on line 9 9, Figure 8.

Referring lnore particularly to the draw-4 ings the numeral 10 designates generally a mixing chamber having an air` inlet 11 and a A mixture exit 12.

A butterfly throttle valve 13 is arranged to control the passage of fuel and air through the outlet 12 and the throttle is provided with a tubular shaft 14, the ends of which are journaled as at 15-16 in the walls of the chamber. The throttle is provided with a. slot 17 (see particularly Figure 3) 011 one 55 s? de thereof and the 'slot is disposed substantially parallel with the faces of the throttle, and preferably terminates -short of the shaft 14 to provide a body portion18 which forms the bottom of the slot. Passing through the portion 18 are a plurality of apertures 19 which form communication between the interior of the shaft 14 and the slot 17 so that fuel entering the shaft 14, in a manner to be hereinafter described, willpass through the apertures 19 into the slot 17 to be discharged therefrom into the chamber 10. i

The throttle is adapted to be actuated by means of an arm 20 which is secured to one I end of the shaft 14 and the arm is actuated 70 in the ordinary and well known maner (not shown). l

Within a fuel inlet chamber 21 is a-diaphragm 22 constructed of any suitable material dividing the chamber into an inlet chamber and a suction chamber 23. In the suction chamber is arranged a piston 24 which is connected with the diaphragm and a piston rod 25 passes through a'suitable bearing 26 for guiding the piston. Leading into the `suction chamber 21 on the other side 0f the diaphragm 22 is a passage 27 which may be connected as at 28 with the source of supplyof fuel. A valve 29 is connected with the diaphragm 22 and piston 24 to close or con- 85 i trol the opening 30 of the passage 27 and a spring 31a is arranged on the opposite side of the diaphragm and between the piston 24 1 and the wall of the chamber 23, and tends The lip or tongue 32 of the disc or washer 31 101?A 1s rasillant and tends normally to spring away from the opening 30 when the valve y29 is unseated, so that the opening 30 will be uncovered to permit the fuel to flow into the chamber 21. The valve 29 is unseated by the suction created in the engine and to that end a passage 33 leads from the suction chamber 23 to the chamber 10 (see particularly Figure 1) so that when the engine Iis running suction will always be manifested in the suction chamber 23 to unseat the valve 29 against the stress of the spring 31. As this valve is unseated ythe natural resiliency or spring in the lip or tongue 32 will cause it to move away from the opening 30 so as to permit the fuel to flow into the chamber 21. The fuel entering the chamber 21 will flow into the hollow shaft 14 of the throttle 13 and from thence through the openings 19 into the slot 17 to be delivered through the throttle 13 into the mixing chamber 10, Where it will commingle with the air being drawn in through the opening 11 and past the throttle into the chamber 10 by the suction created in the engine.

This discharge of' fuel from the chamber 21 is controlled by a needle valve, and the needle valve construction is arranged within the hollow shaft 14. To that end there is provided a tubular member 34 which is reduced at one end and shaped to form a seat 35 ,at the extremity thereof. The other end of the tubular member 34 is threaded as at 36 and is inserted into the shaft 16 by passing the tubular member through an opening 37 in the disc or washer 31 and through the bottom of the chamber 21, and threading the same into an opening in the wall of the casing. This member 34 is preferably provided with a head 38 which is of a diameter somewhat greater than the opening 37 in the disc or washer 31 so that the disc or washer will be held against the bottom of the chamber 21 by the head 38 of the tubular member 34. The tubular member 34 is open at its inner end so as to form communication between the chamber 21 and the interior of the shaft 16. This tubular member may be of any desired length but preferably extends for some considerable distance .into the throttle 13. A needle valve 39 is arranged within the shaft 14 and projects thereinto from the end of the shaft opposite to the end adjacent which the member 34 is arranged. A portion of the needle valve is shaped to form a bearing 40 which fits within the shaft, and a stem 41 on the valve projects through the adjacent end of the shaft 40 and also preferably through the arm 20. The stem 41 is of an external diameter less than the internal diameter of the shaft 14 so that a spring 42 may be arranged between the end of thebearing 40 and the arm 20 and tends normally to move the needle valve 39 against the seat 35 of the tubular member 34. Thus it will be Seen that by adjustlng the needle valve 39 the flow of fuel throughthe throttle 13 will be controlled. By moving the valve 39 away from the seat 35 fuel which enters the tubular member 34 will be delivered into the shaft 14 and thence through the openings 19 into the slot 17 to be delivered through the throttle 13 and into the chamber 10. By adjusting the needle valve it will be manifest that the supply of fuel may be readily controlled.

Any suitable means may be provided for adjusting the needleV valve 39 with respect to the seat 35 and to that end there may be provided a collar 43 which is threaded upon the stem 41 of the needle valve and a lock nut 44 may be provided for holding the col'- lar in its adjusted position.

Mounted uponv the casing of the device is a su port and guide 45 upon which a sleeve 46 reely moves, and projecting from the sleeve is a bifurcated arm 47 which enters a groove 48 in the collar l43. v Carried by the arm 47 is a projection 49, and secured to and movable with the arm 20 is a cam 50. The cam 50 and the projection 49 areso arranged that the spring 42 operating against the needle valve 39 will hold the projection 49 against the cam 50, the sleeve 46 sliding freely upon the guide and support 45. When the arm 20 is rocked to move the throttle 13, the cam 50 will move the sleeve 46 upon the uide 45,thereby movingthe needle valve in a irection away from the seat 35 so that by the operation of the throttle 4the supply of fuel will be correspondingl controlled. When the arm 20 is moved in t e opposite direction, the spring 42 operates to move the needle valve 39 towards its seat 35 and also causes the sleeve 46 to follow upon the guide 45.

By adjusting the position of the arm 20 with respect to the shaft 14 which may be accomplished through the medium of a fastening device 51, the extent of movement of the needle valve 39 with respect tothe adjusment of the throttle 13 may be varied at wil With this construction it will be manifest that the fuel when it is being supplied to the mixing chamber will not strike the throttle but will flow through the throttle to be delivered into the mixin chamber and entering the slot 17 the fuel will be equally distributed throughout the area of the throttle.

In order to provide a means whereby a small amount o fuel may be supplied to the engine, when the throttle is closed and to provide for idling of the engine, the throttle 13 may be provided with a cut away portion or slot 52 through its edge so that the supply of air will not be entirely cut oif. A passage 53 is also provided (see Figure 1) which leads from the fuel inlet chamber 21 and preferably has communication with the suction passage 33. A needle valve 54 is provided for controlling the passage 53 so with this construction the ordinary choke is dispensed with and the supply of fuel will be lat all times under the control of the operator.

While the preferred formof the invention has been herein vshown and described, it is to be understood that various changes may be made in the details of construction and in the combination and arrangement of the several parts, within the scope of the claims, without departing from the spirit of this invention. A

What is claimed as new is 1. A carburetor embodying a mixing chamber, a butterfly throttle valve, means embodying a valve controlled passage for delivering fuel into the chamber through the throttle valve, a supply passagefor delivering the fuel to the first saidpassage, a resiliently yielding element for controlling said supply passage, and means whereby engine suction will actuate the, said resiliently yielding element.

2. A carburetor embodying a mixing chamber, a throttle valve, valve mechanism within the throttle for controlling delivery of fuel to the chamber through the throttle, a fuel passage for delivering fuel to the said valve mechanism, a resilient element for controlling said passage, ineans for engaging and moving said element with respect to the passage, and means whereby engine suction will actuate the last said means.

3. A carburetor embodyingl a mixing chamber, a throttle valve,.valve mechanism within the throttle for controlling delivery of fuel to the chamber through the throttle, means responsive tothe operation of theel throttle for controlling the said valve mechanism,l a fuel chamber, an inlet to ther fuel chamber, a resilient-element movable across the inlet for controlling the'latter, a valve for engaging and operating said element, and means whereby engine suction will actuate the last said valve.

4. A carburetor embodying a mixing chamber, a throttle valve, means for actuating the'throttle, means for delivering fuel to the chamber through the throttle, means for controlling the delivery of fuel to the last Y recited means, an operative connection between the throttle operating means and the fuel delivery control means whereby the latter will be actuated when the throttle is operated, a fuel supplychamber, an'outlet` from the fuel chamber to deliver fuel to the fuel delivery means, an inlet for the fuel chamber, a resilient element movable across the said inlet to control the same, a valve for engaging and moving the element across said inlet, and means whereby engine suction will actuate the last said valve.

5. A carburetor embodying a mixing chamber, a butterfly throttle valve having substantially parallel faces, needle valve mechanism within the throttle, there being an opening through the throttle and between the faces thereof, and passages also between the faces of the valve and discharging into said opening and through which passages fuel is discharged from the needle valve, a supply passage for the fuel delivered to the needle valve, a resilient element controlling said passage, an element for engaging and actuating said resilient element, means whereby englne suction will operate the actuating element, and means for actuating the needle valve, the said needle valve' being responsive in its operation to the operation of the. throttle.

6. A carburetor embodying a mixing and means for actuating theneedle valve, the l said needle valve being responsive in its operation to the operation of the throttle.

7. A carburetor embodying a mixing chamber, a butterfly throttle valve having substantially parallel faces, needle valve mechanism within the throttle, there being an opening through the throttle between the faces thereof, and passages also between the faces of the valve and discharging into said opening and through which passages fuel is discharged from the needle valve, a valved passa-ge for supplying fuel to the 'needle valve, means whereby engine'suction will control the valve in said passage, means for actuating the needle valve, the said needle valve being responsive in its operation to the operation Vof the throttle, and means for varying at will the extent of operation-of the needle valve, there being an additional passage through'the throttle valve topermit the passage o fuel when the throttle valve is closed.

8. A carburetor embodying aA mixing chamber, a hollow shaft, a throttle connected with the shaft, needle valve mechanism arranged within the shaft and throttle,

there being an opening through the shaft and in the throttle discharging through the pe'- riphery of the latter through which fuel is delivered from the needle valve, a lvalved control passage for supplying fuel to the 5- needle valve, means whereby engine suction will actuate the valve in said passage means for actuating the throttle, and means embodying cam mechanism for actuating the needle valve when the said throttle is actuated, said throttle having an additional opening therethrough to permit passage of fuel when the throttle is closed.

9. A carburetor -embodying a throttle through which fuel is delivered to the en- 15 gine, needlevalve mechanism within the throttle, means for controlling the needle valve, a fuel chamber, an outlet from the fuel chamber to deliver fuel therefrom, an inlet to said fuel chamber, a resilientelement movable across said inlet to control the inlet, a valve for engaging and moving said element across said inlet, and means wherebyengine suction will actuate said valve.

10. A carburetor embodying' a throttle through which fuel is delivered to the engine, needle valve mechanism within the throttle, means for automatically actuating the needle valve, a fuel chamber, an outlet from the fuell chamber to deliver fuel therefrom, an inlet to said fuel chamber, a resilient element movable across said inlet to control the inlet, a valve for engaging and moving said. element across saidinlet, a diaphragm to which the valve is connected, and means whereby engine suction will operate upon the Y diaphragm to actuate the valve.

11. A carburetor embodying a mixing chamber, a throttle, a fuel chamber, an outlet leading from said fuel chamber to deliver fuel therefrom, an inlet to the fuel shaft and to which valve fuel is delivered from the fuel chamber, means whereby fuel will be delivered to the mixing chamber through the throttle, an inlet to the fuel chamber, a valve in the fuel chamber for controlling said inlet, means whereby the last said valve will be actuated by engine suction,

an additional .passage leading from the fuell chamber, a valve within the fuel chamber for y controlling said inlet, means whereby engine suction will actuate the valve, an additional passage leading from the fuel chamvalve for controlling the last said passage.

12. A carburetor embod ing a mixing chamber, a throttle, a fuel c amber, an out- -let leading from said fuel chamber to deliver fuel therefrom, an inlet to the fuel chamber, a valve within theA fuel chamber for controlling said inlet, means whereby engine suction will actuate the valve, an additional passage leading from the fuel chamber to the suction side of the throttle, and a valve for controlling the last said passage,

there being a passage through the throttle for admitting to the suction side 'of the throttle when the throttle is closed air to mix with the fuel delivered throu h the said additional passage from the fue chamber.

' 13. A carburetor embodying a mixing chamber, a throttle valve, a hollow shaft to which the throttle is connected, a fuel chamber, needle valve mechanism within said ber to the suction side of the throttle, and a operation to the operation of p

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