US2029853A - Carburetor - Google Patents

Description

Feb 4;, 1%. v. CAMPANELLA fi CARBURETOR Filed July 18, 1.935 2 Sheets-Sheet 1 Mai.

x51 11.1 PA Nil .414 INVENTOR.

ATTORNEYS.

Feb, 4, 1936. v. CAMPANELLA CARBURETOR Filed July 18, 1955 2 Sheets-Sheet 2 FIG J V/ro CAMP/IAAELLA.

INVENTOR vfi ATTORNEYS.

Patented Feb. 4, 1936 UNITED STATES PATENT OFFICE- This invention relates to improvements in carburetors for internal combustion engines.

One of the many objects of the invention resides in a carburetor for use upon internal combustion engines having" either the updraft or down draft system of fuel feed, and which embodies features of construction for increasing the efliciency of fuel consumption, by proportionately increasing the flow of air and liquid fuel to the mixing chamber.

Another feature of the invention is to provide a carburetor in which the liquid fuel supply from the'reservoir may be manually controlled from the dash board of a motor vehicle to adjust the same'to suit various climatic and engine running temperatures, for under certain temperature conditions a lean or rich mixture of air and liquid fuel is desired for efficient and economic operation.

A further object of the invention is the provision of a carburetor in which the flow of air to the mixing chamber is proportionate to the sucntion of the pistons of the engine and wherein the air flow maybe manually regulated from the dash board to accurately vary the flow to meet changes in climatic temperatures. 1

A still further object resides in a carburetor having the above mentioned features which all coact to induce quicker and positive starting of an internal combustion engine.

With these and other objects in view, the invention resides in' the certain novel construction, combination and arrangement of parts, the essential features of which are hereinaftermore fully described, are particularly pointed out in the appended claims and are illustrated in the accompanying drawings, in which:

Figure 1 is a side elevational view of my improved carburetor.

Figure 2 is a horizontal sectional View on the line 2-2 of Figure 1.

Figure 3 is an enlarged detail horizontal sec tional view illustrating the adjusting means for the liquid fuel supply. 1

Figure 4 is a vertical longitudinal sectional view through the carburetor.

Figure '5 is an enlarged detail vertical sectional view with the 'fuel regulating valve in elevation.

Figure 6 is an enlarged vertical sectional view through the fuel regulating valve.

Figure '7 is a detail sectional view through a dash-board illustrating the holding means for the regulating rods.

Referring to the drawings by reference characters; the numeral I designates my improved carburetor in its entirety and which includes a horizontally disposed pipe section I I, the air inlet end of which is provided with a threaded nipple I2 while the opposite end is down turned and provided with a flange I3 for coupling with the intake manifold of an internal combustion engine.

The intermediate portion of the pipe section I I is enlarged and provided with a well I4 which opens through the top of the pipe section. Seated in the well I4 is a block I5 having a substantially U- shaped passage I6 formed by a downwardly depending cone bearing or seat I1. The passage I6 communicates with theinle't and outlet end of the pipe section I I and constitutes a mixing chamber for the liquid fuel and air for the vaporization of the liquid fuel.

The member I 5 is held in fixed position by base plate sections 18 which overlap the top of the member I5 and are bolted in position by bolts I9, certain of which pass through one of the base sections I8 and directly into the member I5.

Rising upwardly from the base plate sections I8 are studs'ZIl, which are connected to legs 2I extending downwardly from a liquid fuel reservoir 22. The studs 20 and alined legs M are joined by coupling nuts 23.

Contained within the reservoir 22is the usual float valve 24, float actuated valve mechanism 25 for controlling the flow of liquid fuel to the rese'rvoir' 22 from the fuel supply pipe 26. The reservoir 22 is providedwith a fuel outlet 2! and connected to the outlet by a coupling nut or union 28, is the upper flanged end of a rotary valve member 29. The valve member29 is hollow and the lower end terminates in a cone 30 which is seated in' the cone shaped hearing I! above mentioned, while the upper end is mounted in roller bearings. The valve member 29 adjacent the pointed endof the cone is provided with a restricted fuel feed chamber 3| which is substantial- 1y diamond shaped in cross section as shown clearly in Figure 6 of the drawings and forms a part of the fuel supply conduit from the reservoir to the mixing chamber. Liquid fuel enters the chamber 3| through a restricted inlet '32 and is discharged therefrom through radially extending orifices 33 which are upwardly and outwardly inclined. The upper end of the rotaryvalve member'29 beyond the plane of the base plate I8 is provided with a gear 34 which meshes with a gear segment 35 pivotally mounted asat 36 to'one of the base plate sections I 8. The gear segment 35 constitutes the actuating gear for imparting turning movement to the rotary valve member and a spring 3'! acts to normally hold the gear 35 in a position so that the openings 33 are in register with the orifices 38 provided in the conical valve seat or bearing I1.

The gear segment 35 is provided with an arm '39 to which one end of an acttating rod 40 is operatively connected, the other end of the rod being provided with a manipulating handle 4!, the rodbeing mounted in abearing member 42 for mounting in the dash board of a vehicle. By the actuation of the rod 40, the gear segment 35 may be turned to impart corresponding turning movement to the rotary valve to vary the radial position of the discharge orifices 33 with respect to the discharge openings 38.

Having explained the construction and means for feeding liquid :fuel from the reservoir 22 to the mixing (chamber I6, I shall now explain the mannor in which air is passed through the mixing chamber for vaporization with the liquid fuel. However, before going into this explanation, it will be seen by reference to Figures and 6 that a guard or apron member 43 is threaded to the cone seat I! and surrounds the outer ends of the openings or jets 38 for the purpose of deflecting the liquid fuel downwardly for mixture with the air as it passes through the mixing chamber 15.

Threaded-to the nipple 212 of thehcrizontal'pipe section I I is the elbow end M of a vertical upstanding pipe section &5, and'threaded to the upper end of the pipe section 65 is anzangular pipe section 46, the inlet end of which is 'closed by a screen 41 for filtering air :drawn thereinto. Pivoted in thersecti-on 45 adjacent the inlet end, is a gravity aactuatedvaive "48 opens by reason of the suction caused by'the intake strokebf the pistons of an internal combustion {engine Rotatably mounted in the pipe section 45 is a rotaryfanfl whichmay be mounteddn-anti-friction bearings and extending through the upper pipe section 1.6 andterminating above and adjacent the blades of the fam ataanangle thereto, .are air :inlet tubes $0, the enuter ends $5.1 being :funnel shaped. Although the screened end of the pipe section 416 eonstitutesrthe :air inlet, a proportionate amount of air issuckedin through the tubes 50 depending upon the acceleration of theengine withwhichzthe-carburetor is associated.

Therotaryfan 49 assists in the mixing of the air with the fueLz-and furthermore tends to overcome the pulsationsinthe iflowpf the-air; that is, a momentaryirush of air will impart-a :rotarymotion -'to the fan and its initial inertia will keep it rotated during a momentary slowing up of the flow of air :and during this time the fan actsas "an impeller.

For the .purpose of regulating the flow fOf air through the carburetor, a valve 52 ispivoted in the elbow ll of the pipe section. This valve is normally held ina position to close-the air passage by equalizing springs 53 but a restricted passage 54 is provided in thevalve for permitting .a restricted amount of .a-irwto pass to the mixing chamber, although upon acceleration of the engine, the suction will -.-move the valve 52 toward the right :and provide an enlarged :passage for the free how of air to 'themixing chamber. From the above description it will be .seen that the speed of the engine controls the inflow of air to the mixing chamber 16 and the flow "of liquid fuel to the mixing chamber may She controlled or set by the actuation of the "rod 40 to impart trotation to therotaryyalve member .2 9.

For regulating the flow of irrespective of the automatic valve '48 and valve- 52, there is provided a butterfly valve '55 in the inlet side of the pipe section 11. .Byreference to Figure 1, it will be seen that a .coil spring 56 tends .to normally hold the butterfly valve in a horizontal or open position but actuation of the valve from the dash board possible by reason of a rod 51 operatively connected to the'butterfiy valve exteriorly of the pipe section ill. The rod' 51 extends to the dash board of a motor' vehicle and is provided with a knob 58 which when pulled tends to close the butterfly valve against the action of the spring 56.

In Figure '7 of the drawings, I have illustrated a resilient adjustment for the holding of the actuating rods 40 and 51 in .an adjusted position. Both rods are held in a similar manner, so that a description of the holding means for the rod 40 will sulfice for the holding means for the rod "The rod 40 extends through a bushing 60 mounted in thedash board 6| of an automobile. An inner wall of the bushing is provided with a series of undulations or teeth 62 with which the outer rounded end 63 of a pin 64 engages. The pin is slidably carried by the rod 40 and urged outwardly by a spring '65. The tension of the spring is sufficient to hold the pin in seated position between adjacent humps or teeth, and will yield inwardly upon manual pulling or pushing of therod to adjusted position.

h'but-ter fly valve 59 is also provided in the pipe section 1 1 on the outlet side of the mixing chamber =for the purpose of controlling the flow of yaporized fuel from the carburetor to the intake manifold.

While I have shown and described what I :consider tube the most practical embodiment of my invention, it will be understood that various changes in construction as come within the scope of the appended claims may be resorted to if :desired.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent-of the United States, 2--

l. carburetor comprising in combination a mixing -chamber, a fuel reservoir mounted above said mixing chamber and having an outlet, a valve seat extending within said mixing chamher and having apertures extending through the walls thereof into said mixing chamber, a 1101-- low valve member rotatably-connected to the outlet of said reservoir and seated upon said valve seat, said valve member having outlet apertures therein for register with the first mentioned apertures to establish -..communication between said reservoir :and said mixingchamber and for movement outo'f registration therewith, and manual actuating means for imparting turning movements to said valve member.

2. A carburetor comprising in combination, a conduit having an air inlet at one endand a mixingchamberintermediate the ends thereof, a fuel supply reservoir mounted on said conduit and disposed-above said mixing chamber, said reservoir having an outlet, a hollow valve member irotatably :connected at its top end to said outlet and having a cone shaped lower end, a cone shaped seat provided in a'wall of said mixing chamber, for receiving the cone shaped end of said valve member, the walls :of said seat having passages therethrough communicating with said mixing chamber, an auxiliary fuel feed reservoir in the cone shaped end of :saidvalve member, and fuel outlet ducts in the cone end of said valve member for radial registration with the passages in the walls of said valve seat, and actuating means for imparting a turning movement to said valve member for varying the'relative radial position :of said outlet ducts with respect to said passages.

VIIO CAMPANELLA.

Images