US1762200A - Carburetor - Google Patents

Description

June 10 1930. M, sTElNHARDT ET AL 1,762,200

CARBURETOR I v Filed March 1ej1925 :s Sheets-Sheet 1 INVENTORS 61 r a zw BY 7 v ATTORNEYS June 10, 1930. $TE|NHARDT ET AL 1,7 2.2oo v CARBURET OR Filed March 16, 1925 5 Sheets-Sheet 2 BY y z ATTORNEYS IN ENTORS Fig.6

June 10, 1930. M. STEINHARDT Er AL 1,762,200

CARBURETOR 3 Sheets-Sheet 3 Filed March 16, 1925' m EN/TO s I I wm W 7% ATTORNEY S I Patented; June w, 1&86

PATENT r ce MAX STEINHARDT, or MUNICH, GERMANY, AND EMIL BAUER, or Yonxnns,

NEW YORK I oannunnron I Application med March 16, 1925. Serial No. 15,723,

This invention relates to an improved type of-c'arburetor.

i It is an object of the invention to provide -proved. carburetor which will efficiently atomize virtually all fuel particles so as'to furnish a homogeneous mixture-in which the fuel is minutely subdivided in order to 'obtain' a fuel mixtureby means of which an internal combustion motor or similar consuming element-mayjbe operated'with ut-' the lines 5 and in the direction of the armost efficiency.

' -Another object is' that of furnishing a fuelmixing device which will operate, and be under-the'control of 'an operator, in such amanner as toreduce fuel consumption to a minimum. i

Another object is that of providing an apparatus of the nature stated which when utilized'for example in association with an internal combustionmotor, will facilitate the starting of-the same, aside from the fact that it-will permit-0f the operation of the motor.

being controlled with a great degree of nicety. Stillanother object is that of providing a carburetorwhich will eificiently perform the purposes for which it is intended, and

which willalso be economically and readily manufactured and assembled.

Other' objects of the invention will in part be obvious and will in part appear herein- ;5 after.

The invention accordingly comprises the features of construction, combinations of elements, and arrangement of parts, which will be exemplified in the constructions here '40 inafter set forth and the scope of the application of which will be indicated in the claims.

I For a fuller understanding of the nature and objects of the invention reference should as behad to the following detailed description taken in connection with the accompanying drawings, in which:

- Fig. 1 is-a side elevation ofone form of carburetor embodying the improved, construction of the present invention.

Fig. 2 is a sectional View similar-to Fig. 1.

y F igl 3 is an enlarged sectional and partly fragmentaryview of the device shown in- Fig. 2.

- Fig. 4: is a fragmentary sectional view of a portion of the mechanism as illustrated in Fig. 3 .and showing'the' parts ina different position. A

Fig. 5 is a sectional planview taken along rows indicated in Fig.- 2.

Fig. 6 is a similar View taken along the lines 66 and-in the direction of the arrows alsoindicated in Fig. 2.

Fig. 7 is a sectional plan view taken along the lines 77 of Fig. 1 and Fig. 8 illustrates one of the details of construction.

In these several views the invention has been illustrated in the form of a carburetor particularly adapted for use in connection withinternal combustion motors. Here numeral 10 indicates a main housing or casing of the carburetor which in the present instance has its lower end in communication with an air intake casing 11 the flow through the latter being controllable, if desirable, by means of what is commonly termed a choke valve as at 12.

The mechanism by means of which the fuel anism afore referred to and through the case0 ing 13-may be controlled by means of a valve. In the present exemplification this valveincludes a body 15 which cooperates with a seat 16 formed within-the casing 13. The

body of the valve is' carried by a stem 17 and the latter tends to maintain this valve in seated condition incident to the provision of a spring 18. This spring cooperates with the stem and is in turn carried within the socketed end of a rod 19, the latter passing through suitable packing 20 disposed within a casing 21. The lower portion of this casing is formed with a screw thread and the base of the rod 19' is enlarged and screw threaded as at 22in order to cooperate with the thread aforementioned.

Thus, if this enlarged portion of the rod is turned as for example by means of a torque cable 23 it will be obvious that consequent'to this turning a projection and retraction of the rod 19 will result, in turn resulting in a seating and unseating of the valve to permit or to interrupt the flow of fluid through the easing 13.

Referring now in detail to the mechanism by means of which the fuel and air are mixed to produce an eflicient explosive mixture it will be noted that a collar is interposed between the housings 10 and 11, this collar being illustrated in section in Figs. 3 and 5 and in plan in Fig. 8. With particular reference to the latter figure it will be observed that this member in the present instance includes nothing more than an outer ring 24 which is concentrically disposed relative to the upper edge of a tube 25, the parts being retained in assembled and spaced relation preferably by means of a series of radial arms 26.

For the purpose of preventingan escape of the fuel as well as for purposes more particularly hereinafter brought out a second tube 27 has its upper end disposed within the tube 25 and this tube 27 is continued in the form of a nozzle 28. The lower end of the tube projects beyond the lower edge of the tube 25 and through the lower portion of the casing 11 beyond which by means of a suitable union 29 it is. connectedwith the casing 13. At this point the fuel intake casing is formed with an opening intersecting its bore 30 and disposed within and extending beyond the ends of this opening is a sleeve 31, the bore of'which is in communication with the passage 30. As in Fig.2 the lower end of the sleeve may be enlarged as in 32 and carry a packing nut 33 by means of a screw'threaded connection, this nut in turn having its inner face threaded to engage threads34 on the lower part of a spindle 35. This spindle adjacent the point of connection of the bore 30 and the sleeve bore is formed with a reduced portion 36 and a channel 37 is provided in its outer face and has one ofits ends in communication with thls reduced portion, its opposite end being in communication with a bore 38 extending at the upper end thereof.

' In order to control the flow of fluid from the outlet end of the casing 10 a throttle valve which may be of conventional construction, as at 39, is rotatably positioned therein. This valve is controlled in the present exemplification by means of an arm '40 extending exteriorly of the casing and when this arm is ac-' tuated a follower will in the present instance be reciprocated within the casing 10 by vi-rtue of the fact that the valve 39 has one end of a link 41 connected to its underface, the opposite end of this link being connected with the follower. This latter member. which has been shown in plan in Fig. 5 may include a central body portion 42from which a series of arms radiate as at 43. These arms each carry at their outer ends a guide shoe 44 which slidably en ages with the inner face of the casing 10. connecting rod is secured to the underface of this follower preferably by socketing and flanging the upper end of the rod as at 46 and forming the'underface of the follower body with a recess 47 of a size sufficient to slidably accommodate this upper end. A spring 48 is interposed between the base of this recess and the base of thev socket so that the rod 45 is normally pressed downwardly with respect to the follower although its movements are limited in the present instance due to the provision of a lock ring 49 arranged adjacent the mouth of the.

recess and of a size suflicient to prevent the passage of the flange.

The lower end of the rod 45 extends within a Venturi member 50 disposed within the casing 10, and at a point somewhat above the central portion of the same is connected with a valve which controls to the greatest extent the flow of fluid through the Venturi. This socket and has one of its ends bearing against the base of the same, its opposite end bearing against a disk 58 carried by the upper end of a valve stem 59 which in the present instance extends into the collar 53 and the socketed lower portion of the rod 45. The upper end of the nozzle extends into the bore 60 formed within the collar 53, the body 51 and skirt 61 of the valve- The upper end of the nozzle 'is formed with an outlet opening 62 and a valve 63 carried by the stem 59 normally closes this opening. The upper end of the spindle 35 extends within the tube 27 and terminates adjacent the upper end of this memi the stem 59.

. valve 63. i It is here to Finally, with reference to the construction depicted in the present instance it will be noted that the mouth of the tube 25 is flared as at 65 and that the skirt 61 is spaced from this flared mouth as well as from the outer face of the nozzle 28, the latter-being tapered towards its upper end so as to provide a space of increasingly cross sectional area between the inner face of the bore and its outer face.

In operating a device of this character the fuel intake line 14 is connected with a suitable source of fuel supply, the upper end of the casing is connected with a consuming element such as an internal combustion motor, the air intake casing may be connected with a suitable mechanism providing a hot air intake and the torque cable 23 may be-associated with a dash control. If it is desired to start the motor the valve 15 is unseated permitting the flow of fuel into the sleeve 31 channel 37 and bore 38 until it reaches a point at which its further fiow is sto ped by means of the he noted that by means of the present construction it is unnecessary to .utilize afloat chamber. However, obviously,-if it were desired this element might be employed. If now the consuming element (i. e. motor) is operated to cause a suction within the casing 10 this suction will be transmitted past the idling regulator 66 and will 35 act through openings 67 which extend between the bore 60 and the outer face of the collar 53 and air will thus be drawn through the casing 11 between the arms 26 and between the skirt 61 and flaring mouth of the tube 25 and thus into the bore 60. If now the throttle valve 39 is slightly opened this opening will obviously result in a partial unseat-ing of the valves 63 and 64 and the fuel will rise within the bore of the spindle 35, overflow the upper end of the nozzle 28 and begin to pour downwardly over the outer face of this nozzle. In such flowing it will be met by a film of air rushing upwards through the bore 60 and thus a mixture will be produced ideally adapted for the functions of starting and idling.

As the consuming element becomes warm the amount of opening of the valve 15 may be reduced, it being observed, that if the suction is sufiiciently heavy the compensating feature provided by spring 18 will serve to extend automatically the degree of opening of this valve without further attention by the operator. By partial closing of the valve however the richness of the mixture may be regulated. When now the throttle valve 39 is opened to a greater extent air will be free to pass between the Venturi face and the edges of the valve body 51 although it will continue to pass through the bore 60. As a consequence it will be found that the fuel emerging from the nozzle 28 will be initially broken up by the air passing upwardly lower faces of the valve body'51 an enhanced suction will result at the outer ends of the openings 67 so that the comparatively rich fuel mixture emerging from these, openings will be instantly disseminated throughout the entire column of air rising through the casing 10. In this connection it will be observed that incident to the tapered exterior contour the amount of air which comes into contact with the fuel as it emerges from the nozzle 28, and consequently the mixture will always be initially and properly broken up. Furthermore, due to the fact that the degree of inclithrough this bore and due to the fact that the air is'diverted as in Fig. 4 by the inclined nation of the underface of the valve body 51 is greater than the degree of inclination, of the venturi 50 as is shown in Fig. 4, the rate of travel of the air will be accelerated, and

as a consequence, the degree of the suction.

will be increased.

The fuel supply, however, is not proportional to the increase in suction at all points in the travel of the valve member, since it is seen that when the valve member 51 has moved vto its extreme unseated position, the valve body 64 operates in conjunction with the opening 62 to throttle down the fuel supply as the valve member 52 is further opened to admit the air supply. Thus it is seen that as the speed of the engine or other consu1n-.

ing element approaches a certain valve, the fuel fed to the mixture is automatically cut down, so that a lean mixture results which is both desirable and efficient from the standpoint of engine performance at high speeds.

By virtue of the provision of spring 57, the valve '39 has yieldable motion with respect to the nozzle and is then seen to be respon sive to varying conditions in the demand for combustible mixture.

Also due to the provision of the spring 48 the mechanism of'the carburetor will adapt itself to varying conditions of suction and will automatically, within limits, adjust the position of the valve stem 59. Finally with reference to the-pocket provided by the flaring mouth 65 of the tube25 it will be observed that unvaporized fuel particles will not escape into the air intake of the carburetor but will collect in this pocket and gradually be absorbed by surface contact with the air which rushes into the bore 60.

Since certain changes may be made in the above construction and different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above de- 'scription or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which as a matter of language might be said to fall therebetween.

Having described our invention, What we claim as new and desire to secure by Letters Patent is:

1. In a carburetor, the combination comprising a casing having an air inlet chamber and a communicating mixing chamber, a nozzle having a connection adapted for communication with a fuel supply, said nozzle being provided with two valve seats, one being disposed at its outlet orifice and a second on the interior thereof, a valve member having portions adapted to seat simultaneously on each of said seats respectively the portion adapted to seat on said second seat being arranged to restrict said orifice when the valve member is moved to extreme unseated position, and a second valve member disposed to control directly the communication between said chambers and adapted to be operated by suction, said second valve member being operatively connected to said first named valve member and ar ranged to operate the same for supplying fuel proportionately to opening communication between saidchambers at low suction rates.

prising a casing having an air inlet chamber and a communicating mixing chamber, a nozzle having a connection adapted for communication with a fuel supply, said nozzle being provided with two valve seats, one bebetween saidchambers and adapted to be operated bysuction, said second valve mem ber having'a skirted portion cooperating with said nozzle for providing an initial mixture of air and fuel and having a flexible connection to said first named valve member.

3. In a carburetor, the combination comprising a casing having an air inlet chamber and a communicating mixing chamber, a nozzle. having a connection adapted for communication with a fuel supply, said nozzle being provided with two valve seats, one being disposed at its outlet orifice and a second on the interior thereof, a valve member 2. In a carburetor,the combination com having portions adapted to seat simultaneously on eachof said seats respectively the portion adapted to seat on said second seat being arranged to restrict said orifice when the valve member is movedto extreme unseated position, and a second valve member operatively connected to the first valve member and disposed to control directly the communication between said chambers and adapted to be operated by suction, said second valve member being arranged to be actuated by the pressure differential in said chambers and having a skirted portion extending about said nozzle toward said air inlet chamber and openings providing restricted communication between said skirted portionand said mixing chamber whereby an initial supply of air may enter from said inlet chamber to said mixing chamber.

4.- In a carburetor, the combination comprising a casing having an air inlet chamber and a communicating mixing chamber, a nozzle having aconnection adapted for communication witha fuel supply, said nozzle being provided with two valve seats, one being disposed at its outlet orifice and a second on the interior thereof, a valve member having portions adapted to seat simultaneously on each of said seats respectively the portion adapted to seat on said second seat being arranged to restrict said orifice "when the valve member is moved to extreme unseated position, and a second valve member disposed to control directly the communication between said chambers and adapted to be operated by suction, said second valve member being provided with a yieldable connection to said first named valve member and disposed to be actuated by suction and to open proportionately the communication between said chambers.

5. In a carburetor, the combination comprising a casing having an air inlet chamber and a communicating mixing chamber, a

nozzle having a connection adapted for communication with a fuel supply, said nozzlebeing provided with two'valve seats, one being disposed at its outlet orifice and a second on the interior thereof, a valve member having portions adapted tos'eat simultaneously on each of said seats respectively the portion adapted to seat on said second seat being arranged to restrict said orifice when the valve'member is moved to extreme unseated position, and a second valve member disposed to control directly the communication between said chambers and ada ted to be operated by suction, said secon valve member having a general conical form and provided with an extended skirted portion toward the apex of the cone and recessed to ,fit over said nozzle,, said recess having re stricted communication at one end with said mixing chamber and communicating at its free end with said air inlet chamber whereby second on the interior. thereof, a valve memher having portions adapted to seat simultaneously on each. of said seats respectively the portion adapted to seat on saidsecond seat being arranged to restrict saidorifice when the valve member is moved to extreme unseated position, and a second valve member disposed to control directly the communi z operated by suction, said second valve being yieldingly connected to said first named valve member, and a throttle valve disposed at the exit of said mixing chamber and having operative connections with said first and second named valve members, said throttle having a recess to permit the passage of a starting and idling mixture when in closed position.

In testimony whereofI'afix my signature.

r MAX STEINHARDT. In testimony whereof I ailix my signature. EMIL BAUER.

cation between said chambers, said second valve member having a general conical form and provided with an extended skirted portion toward the apex ofthe cone and recessed to fit over said nozzle, said recess having a portion arranged to house a spring and a coupling member adapted for yieldingly connecting said firstand second valve members in operative relation.

7. In a carburetor, the combination comprising a casing having an air inlet chamber and a communicating mixing chamber, a nozzle having a connection adapted for communication with a fuel supply, said noz'zle being provided with two valve seats, one being disposed at its outlet orifice and a second on the interior thereof, a valve member having portions adapted to seat simultaneously on each of said seats respectively the portion adapted to seat on said second seat being arranged to restrict said orifice when the valve member is moved to extreme unseated position, and a second valve member disposed-to control directly the communication between said chambers and adapted to be operated by suction, said second valve being yieldingly connected to said first named valve member, and a throttle valve disposed at the exit of said mixing chamber and havingoperative connections with said first an second named valve members. 8. In a carburetor, the combination comprising a casing having an air inlet chamber and a communicating mixing chamber, a nozzle having a connection adapted for com munication with a fuel supply, said nozzle being provided with two valve seats, one being disposed at its outlet orifice and a second on the interior thereof, a valve member having portions adapted to seat simul-- taneously on each of said seats respectively the portion adapted to seat on said second seat being arranged to restrict said orifice when the valve member is moved to extreme unseated position, a second valve member disposed to control directly the communication between said chambers and adapt-ed to be

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