US2569299A - Testing device for carburetor valves - Google Patents

Description

Sept. 25, 1951 A. FEGEI. TESTING DEVICE FOR cARBUREEoR vALvx-:s

Filed July 25 1949 Patented Sept. 25, l1951- FOR'CARBURETOR TESTINGV DEVISE ALVES ibert regel.' vvhit/ierCalif.v Application July 25,1949, Serial No. '106,691

v',Ifhis invention relates to a testing device for an automatic Valve of a carburetor` andit is an objectkof the invention to provide a device of this kind providing means whereby there can be determined if the valve is properly seating `and opening.` v 4 Itis also an object of the invention to provide a device, of this kind for use in connection with a diaphragm operated valve member to determine 4if there is leakage occurring at the di-aphragm.

The'invention consists in the details of :construction and in the combination and arrange- `ment ofthe several parts of my improved gauge for carburetor valvev whereby'certain advantagesv are attained, as. willbe hereinafter more fully set forth. i

lIn order that myhinvention may be ,better understood, 'I. will 'now proceedv to describe the same'vwith reference to the accompanying drawings, wherein n y y Figure 1 is a view vin perspective of testing device:constructed` in accordance with an embodiment of the invention;

Figure 2 is a vertical sectional View taken lengthwise through Figure 1 with parts in elevation;

VFigure 3 is a detail sectional view taken substantially on the line 3-3 of Figure 2; and

Figure 4 is a sectional view'taken substantially on'the line 4-4 of Figure 2.

This invention relates to a testing device for carburetors. In a type of carburetor now in general use there is provided a valve that opens thereby permitting the feeding of more gasoline, under certain operating conditions of the motor, namely, .at speeds of 70 `M. l?.v H. or better or when climbing a very steep grade. In the drawing this valve I .is-. shown in cross section. You will notevthat ther valve is provided with a diaphragm-2, a needle valve 3, and a spring 4. In operation, this valve is subjected, 'when themotor is idling, toa vacuum pressure of twentyv inches offnrercury on the side of the diaphragm indicated by the arrow. As the throttle of the 'carburetor is opened and the speed of the motor increases, the vacuum of the intake decreases. When the vacuum within the manifold reaches seven inches of mercury, the spring 4 overcomes the vacuum pressure against the diaphragm 2 and the needle valve 3 opens thereby permitting considerably more gasoline to enter the mixing chamber of the carburetor. As mentioned before this condition is designed to take place'at speeds of 'I0 and above and/or when the car is labor- .1Ds up a relatively steep grade. The purpose of mm, Kol. "1s-4e) scribed carburetor valve.

kconnected to some convenient spot on the intake flow of vacuum energy by way of a passage I8 'enclosing the diaphragm 2.

. 2 the valve is, of course, to provide the economy of a small jet under low demand conditions and yet provide the additional fuel necessaryvunder high demand conditions. Frequently this valve I, isY or becomes defective, either the diaphragm 2 begins to leak or the spring 4 because of vibrations weakens or" tightensf Because prior to this there has been no convenient means of checking this valve; it has been the practice when adjusting the carburetor, to remove the old valve and replace it with a new one. Many times'in so doing a perfectly good valve is discarded and it is replaced by a new valve defective in manufacture. Y v g l Y The' presentinvention provides a convenient and. certain means of checking the above de- A rubber hose I0 is manifoldof a car, customarily the windshield wiper connection, and to a port II to admit the to a gauge I2, a bowl I3, and by way of connecting passages I 8a and I8b to a gauge Il .and a Y bowl I5; said bowls being mounted in spaced relation upon a at support S and between the same and a flat head member M. As best 'shown in Figure 4 it is to be noted that this energy is caused to Ilow through -a restrictor I6, in the passage I8a, before reaching the gauge Il and bowl I5 and through a restrictor I1 in the passage I8, before reaching the gauge I2 and bowl I3. The passage I8b leading to the gauge I4 and the bowl I5 from the passage I 8a, is provided with a restricted bleeder I9 to atmosphere for a purpose to be hereinafter described, Leading from the bowl I5 is a port 20 that opens into the body of the valve 3 to be tested below the diaphragm 2, and leading from the bowl I3 is a port 2| that opens, into the interior of a cover 22 Both of the bowls I3 and 15are lled with a fluid, preferably kerosene, to a height to cover the lower ends of dive tubes 20 and 2|', depending from the ports 20 and 2I,nres'pectively. 'I'he passage I8b is provided with a manually operated needle valve 2| that selectively shuts out or permits a flow of atmosphere through the port 23 and the passage I8 is provided with a manually operated needle valve 25 that selectively closes or opens Va port 26 leading to atmosphere.

To operate this testing gauge the manual needle valves 422 and 25 are closed and the vacuum energy being generated by the motor is directed to the port Il. When this is done, the gauge I2 should indicate approximately twenty air will travel frc'msthe valvejbodyfthrough;theV port 20 andthedive ltube 20', causing'vbiibbles-tof rise through the fluid in bowl I5. Now, if the valve leaks either through its diaphragm 2 or*V needle valve 3, it is readily discernibleandcan,

be corrected. The iinal thing to be determined.,

about the valve I is whether or not the valve is opening at the proper time.

I8b, and the ports 20, 2I, 23, 24 and 28, open through the side edges of the member M, as does also the port 26.

From the foregoing description it is thought to be obvious that a gauge for carburetor valve constructed in accordance with my invention is particularly well adapted 'for use by reason of the convenience and facility with which it may be assembled and operated.

Iclaimr Apparatus for testing an automatic valve for a carburetor, which valve comprises a body carrying. a-diaphragmmwhich is subjected on one side In order rto do this the manual needle valve 24 isy opened,-t oythat point that the gauge I4 reads one inch of Inercury. This is done as it is known that-within..

the carburetor approximately one inch of mercurygvacuum energy ispres ent.; Nextth e valv.e, 2521's opened and' this will admitairfthrough the, port. 26 and*A causa-the vacuum press.ureto; drop; thegauge I2pbeing. watchedgand DQlSCeftaken.

when.` bubbles appear -within l,the bowl I 5: inrelaf tion .to ther indicated vacuum f pressure-,on ,gauge I2.; Theneedle valve Sopenswhen;thevacuum, energyr against the` lower. side of lthe diaphraglrn` 2 reaches seven, inches orY less ofV mercury by reason :of f theV springv 4. overcoming the vacuum.

energy.

'In-vieweof the foregoing, it isbelieved apparenti thatfithejdevice r herein comprised clearly indi-.fY

cates if the diaphragm 2 of the valve is leaking., if f the needlezvalve 3Jseatsproperly, and iffthe needle valve opens at the desired time. The variouss passages.k are .provided with restrio'tors.` as

shown to make simpler thek adjustmentof'pres sure by themanual needle valves.

' Tliecover.22 isprovided with. a gasket 2B":and4

merelymests on. the ground surface o 'the .gauge thereby making a vacuum tight cover.

Thebowls Iii-andy I5 each comprises a.cylin drical: tubular body 29ppreferably transparent.- andy having its lower end kclosed by-.a disc closure .i

bothof the bodies v29.

-The disc A closures 3-and themember M are heldin desired placement :with respect to the bodies 2B-bythe bolts 35I- whichextend from below; through thecentral portionslof the closures 3l andgthread .into the under face of the. member .f l\/\I.vithr the, heads :32 1thereof iseated 'in recesses.v

32 formedingthe top surface of 'the`v` support aS.'

Thefmember M;,substantiallymidway of the.-

bowls I3 and I-ighasV disposed therethrough 'an openingS in ,whichis snugly engaged from above'` Itis also` clearly showninthe .accompanying drawings thatgthefport II, passages IVI8;V Isa and ltoireduced manifold pressure and havingga fluid passage through the same communicating at one end with a-space on the other side of the diaphragm; a.. spring.. closed needle valve normally closing the other end of the passage and a port leading laterally from the passage between its ends; said apparatus comprising a flat support, a.. flat head member-having an'openingY in which a partgoifthevalve body seats vto positionvthev diaphragm. with the said one side-thereof upwardly directed, a: coverv member adapted -f to be placed'onthezhead member over the diaphragm to form a chamber in which said one side'ofethe diaphragm is housed,v a pairof vacuum gauges mountedA 'on-t the headV member and interconnected,Y by vacuum conductingpassagesA iny the latten means forrcoupling a-vacuumf liney withgonewof said passages, a pairvoffluidv receptacles-'having said head member disposed over and supported byY the tops thereof, means securnguthe f head1'A member andl saidreceptacles, in spacedrela-V tion onsa'id'support, each of said gauges being,4v in communication with one receptacle, saidjhlead' member havinga p ort opening atone,end .int.o, said chamber and jat its other `endinto-oney of4k said receptaclesa dive tube depending. from, the, last namedpassage down,into.-one..recep tacle, said ,head member having Iav port .connecteH ing with the lateral portofwsaidvalve bodyifatf one ,end and opening intotheother of saidreceptacles at. its, other end, a secondf dive-ftube; depending from the last named port in said ,heads member, into. thee.otherreceptaclaf,said head member, having?, an? air bleedTv port .connectingg with; the passage'leadingyto .that gaugewhich is in communication withf-the'saidotherrecep:4

tacle, Yand a. valvey controlled lcommunication passagebetween each gauge-andthe atmosphere.i`

l ALBERTFEGEL;-

REFERENCES-'CITED f The:gifollowing,Y references arefo record inthe leaofthis patentz':

UNITED STATESQPATENTS;

23216257 Shiroyanf y Sept.- 16,.` 1947.1-

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