Патент USA US2121392код для вставки
June 21, 1933. H. AsHwoRTH CHOKI?v VALVE CONTROL Filed Jan. 5, 1958 ~ . l.\ IlI\lI... » 2,121,392 _Patented 'June 21, 1938 ‘ ' l ,l UNITED STATES PATENT OFFICE 2,121,392 ' cnoKE VALVE coN'rnoL nemici Ashworth, _Manci-nc, N. Y. Application January 5, 193s, serial Nc. _183,557 a- claims. (ci. 12a-11s) This invention relates to choke valve controls. AAmong the advancements in the art ñowing It is Well recognized that internal combustion from my simplified construction are the features engines have diiiîculty in starting, and this is par- that enable the consolidation of the solenoid and ticularly true in cold weather. To overcome the dashpot structure >in the same cylinder without diñiculty; a charge abnormally rich in fuel is ln- modifying the cylinder walls to afford a by-pass 5 troduced into the cylinders during the initial for the. fluid around the Adashpot piston. An revolutions of the engine. This is accomplished other advantage of my simplified structure Aallows by closing the valve, known as the choke valve, ' the elimination of springs in the working parts which controls the supply of air, and4 drawing in because the present invention operates substan 1o substantially pure fuel when the engine’is turned tially by gravity. A further advantage in the 10- by the starting motor. It has been found that after the ñrst few revolutions, and after the engine starts,- `that a continuation of the choke valve in the closed position floods the cylinder l5 With fllely and, Het Only StODS it, but the ÍlOOdîIlB’ ' causes dilution of the ‘lubrication in the crank case. If the choke valve is ‘returned immediately TQ its full Open DOSitiOn When the engine Starts, .the Composition of the charge is S0 lean in fuel 2O ‘that the engine often stalls when it is placed under its normal load. Automotive engineers `have long .been seeking the ideal construction which automatically closes the choke valve until the engine starts and thereafter permits the 25 choke valve to open progressively in accordance present invention involves the use of an electro magnetic operating mechanism which obviates the use of catenulated'rods and linkage of otherv known devices; and permits my invention t0 be used under conditions which require remote con- 15 tro] of a, positive nature where such rods and linkage would be cumbersome. For example, in automobile busses and trucks, or on motor boats, where the'engine is situated at a great distance and ina tortuous direction from the customary 20 position of the operator. i -' A s15111- furl-,hor advantage of my invention is that it promotes a quick cracking. of the choke valve to the partly open position, and a slow uni form progress of the valve from the partly open 25 W1th_ the accepted ïfequìrements 0f emeient Op' position throughout the remainder of its return eratlon. Such requ1rements involve a quick return or cracking of the choke valve to the partly to the fun open position, A further advantage of my invention resides in utilizing a. metal 0f high 9pm positíorf’ Where an' may be instantaneously so introduced into the substantially pure fuel charge; and from this partly @en position' the choke valve should progress uniformly throughout the remainder of its path to the fun -open or norma‘l runmng ' I am aware ofposition' the fact that prior to my inven, s have constructed devices for contion Gther ‘- thermal expansion properties, such as aluminum, or die casting metal' mmaking the housing cyl.. 30 inder so that the movements of the choke valve Wm be Ínñuenced by the heat of the cooling Sys tem of the engine. Were my device in direct con tact with the heat of the'engine ' as by> contact > , . . with the exhaust manifold, or the exhaust pipe, trolling the same movements of the choke valve au the known liquids Servlceable in da'shpots but my invention ’ ` is believed to embody several’ .v would either. evaporate or increase in . viscosity features which are a considerable improvement over these known devices. One advanta e of m through evapotatlon to an extent Where a' harm ful eñect in the operation would be predueed- I invention resides in a construction Whicïi makexsr -Plame my housing cylinder for' the deshpot m the it' adaptable t‘o customary internal combustion engines on the market, and particularly those engines used in standard automobiles, so that the Isaid control may be incorporated when the auto-- area of the cooling system so that the heat ei: Change Will be milder than the heat exchange 111 the area 0f theexhaust manifold and the exhaust Pipe- I mobile is built, or it may be sold as an accessory With the foregoing and other ObJectS _ ,_ 0f the m' _ and installed with the4 minimum of expense in the VentiOn in View, my invention CODSÍSÉS 0f a UDVel - limited space provided. My choke valve control iseasily substituted as an accessory, although not l; limited to-this use, for the customary manually operated rod control vwithout expensive altera-V tion; has fewer operating parts than other known Combination, arrangement and COIlStl‘l-letiOn 0f parts as Will be more Particularly described and illustrated in the eCCOmDaIlying Specification and 5o drawing, but it will be understood that changes, variations, and modifications may be resorted to v.' choke controls performing the same operations; without departing from the spirit of the invention' and promotes economy of manufacture owingto in the subjoined claims. i the simplifled design and construction. A ' . ` 45 f Referring to the drawing in detail wherein is 55 2,121,892 ) , disclosed the preferred embodiment of my inven tion: y ' - Figure 1 is a side elevation of a portion of an internal combustion engine, as mounted in an automobil , and showing an adaptation there with of a choke valve control of the present in vention. shaft when the link is moved. The hollow dash pot cylinder C also forms a‘ combination housing or casing for the cylindrical solenoid and other operating parts of the device. 'I'he cylinder is made of metal of a high coefficient of' expansion to heat'. I prefer to make the cylinder in -two parts, the numeral 20 indicating the upright cup shaped bottom part and 2l designating the Vin - Pigure 2is an enlarged detailed vertical sec verted cup-shaped top part. The open confront ing ends of the top and bottom parts telescope tion through the housing or cylinder with other parts of the engine in side elevation and partly broken away, and also showing the valved piston >of the dash pot when the choke valve is open. ' Figure 3 is a fragmentary sectional view through the cylinder of the choke control device showing the parts of the valved piston when the into each other and are secured together by the threaded joint 22. conventional solenoid 22. Adjacent the solenoid in the lower end >of the cylinder is arranged the dashpot member and in the top of the cylinder is choke valve is being closed by the energized sole noid. a compartment 24 which accommodates the movement of the piston rod and actuating arm as ` 4 is a transverse section through the will presently appear. A magnetically responsive cylinder of the choke control showing the piston in plan. piston rod made in two parts 25, 2l extends through the bore 23a of solenoid 23 and has parts Figure 5 is a sectional plan view taken on a thereof projecting from each end of the solenoid.- - plane directly. above the cylinder of the choke 'I‘he upper part 25 oi!v the piston rod is made of control and looking downwardly. metal inactive ¿to magnetism and the lower part> Figure 6 is a wiring .diagram of the electric 26 is metal responsive to magnetism such as iron or steel. Part ìl‘is anchored fast in a socket in circuit of the choke- valve control of the present invention. part 2l and the latter, in the ,lowermost position of the stroke of the piston rod 'shown in Figure 2, ` Referring to the drawing in detail, A indicates a remote control panel, such as an instrument board of an automobile, a control board of a motor boat, or any other remote position where a human op erator may be located who wishes to control the extendsinto the bore 22a a suilicient distance to lie in the field of magnetic force. explain anI application of the present invention. The internal combustion engine B has the .cus tomary circulating water cooling system and is equipped with a >water cooled cylinder block 1, and bolted to the block is a water cooled cylinder head l provided with the cus ary channels 9 through which the cooling water circulates. .A conventional down draft carburetor is indicated at Il, where the fuel is admitted for carbureting the air passing through the down draft pipe il from the- air filter _|2. The admission of the fuel mixture is controlled by the customary accelera tor rod Il. The charge of air and fuel is delivered to the customary intake manifold Il from where it is distributed to the cylinders and exploded, the resulting products of combustion passing out of the cylindersto the exhaust manifold il in the ` Above thecarburetor Il, in the down draft pipe i I there is rotatably mounted a choke valve shaft It to which is fixed in any- suitable manner a ~ round fiat__ disk‘which forms the choke valve I1 of the butterfly type. This choke valve I1 is' different and distinct from the throttle or accel-y erat'or valve which controls the admission of fuel.v The chokewalve I1 in the customary construc tion, and immy constructio , is normally in the ‘open position indicated in full lines in Figure 2 y the drawinß; and remains in that position as , of ‘long as the control of the present invention is inoperative. In my construction, the choke valve 2m - level indicated at 28. On the side of the bottom part 2l is an outset filling neck 29 to replenish the liquid and the passage of the neck is closed by a screw plug 30. The lower part 26 of the pis combustion engine are shown. as is necessary to ì ' The dashpot member consists of the dashpot chamber 21 filled with liquid such 8.5 Oil t0 the conventional internal combustion engine i3.l Only those parts of the conventional internal customary manner'. In an intermediate part of the _ cylinder properly insulated from the walls is a ton rod extends into the oil in chamber 2l and has a reduced lower end 3i on the terminal of which> is threaded a nut or collar 22. Fixed against the shoulder formed at the point where the reduced part 3i joins with the part 28 of the piston rod is a round valve disk 33 and this valve has a peripheral depending lip I4. ,Thedashpot piston 35 slides very freely on reduced part 2| of the piston'rod within the limits of the valve 3l 45 and the collar 32. The piston l5 has a normal clearance 60 between its periphery and the wall of the cylinder at room temperatures sufficient to permit the liquid to pass between during the re ciprocation of the piston rod. However, the clear 50 ance increases when the walls of the cylinder ex pand under the >temperature induced by locating the-cylinder in the areaI of the cooling system. It will thus be seen that the entire range of move ment of the piston isdnfluenced by the thermal expansion of the wall of the cylinder, which latter is in heat exchange relation with the cooling sys tem of the engine, as will hereafter appear. The upper face of the piston 3l is flat, and in 60 an intermediate part of the piston. are by-pass openings li preferably four in number. -The in diameter than the piston to permit free passage of the liquid through the - valve diskl „is less piston and around the valve on -the up stroke of 05 the piston rod when the solenoid is energized. When the piston abut! th'e valve, the by-pass . swings to open position by the weight o! the actu openings are closed by the valve and the liquid ating arm and connecting rod as will presently can- only pass between the periphery o'f'the pis position indicated by the> In the closed ton and the wall of the cylinder. dotted linea il, in Figure 2, the choke valve sub- . I prefer to mount the cylinder C on the head 2 stantially closes the passage in the down draft of the cylinder block as .close as possible to the ,pipe Il and substantially no air is admitted to channels I _of the water circulating system that the carburetor in which case a charge almost pure cools the-engine. _To mount the cylinder, there is in fuel is drawn into the cylinders. 'I‘he shaft Il a threaded socket 21 in the bottom wall 22 of the extends to the outside and beyond the pipe i i and bottom part 2i. The customary stud bolt 32 b'y has'a‘link Il connected to it which turns the l . 2,121,392 which the head .of the engine is bolted to the cylinder block is made a little longer -than usual, and the free upper end seats in the socket 31 as _ 10I e 2. .3 primed with a charge rich in fuel, the switch 55 is opened whereupon the solenoid is deenergized, >The weight of the piston rod, which obviously By this manner of mount ing the axis of the cylinder extends perpendicular ' forms the core of the solenoid coil, permits it to > to the engine cylinder head, and the cylinder C is sink in the liquid of the dashpot chamber 21 in heat exchange relation with the water cooling until the piston valve 33 encounters the mate system-and remotely situated with respect to the rially'slower sinking piston 35, from which point of encounter the piston rod is retarded by the exhaust manifold I5 and the exhaust pipe. One projecting end, the upper end of the pis-` y ton rod which projects free of the end of sole noid coilV 23, bearsagainst an intermediate part `of an actuating arm 40. Arm 4l) extends into a dashpot action throughout the remaining dis tance of its stroke, because the sole path for dis 10 placing the liquid is the clearance _space 6B be tween the periphery of the piston and the wall ‘ ' slot 4I in the side of top part 20 of cylinder C, of the cylinder. 15 and The distance the piston rod freely drops when has the inner end pivoted at 42 to the cyl inder C. The intermediate portion of arm 40 the solenoid 23 is deenergized, permits the weight 15 extends diametrically across the cylinder and of the connecting rod 4_4 and the actuating arm swings in the upper chamber 24. 'I'he slot 4I - 40 to partially open or crack the choke valve I1 the swinging movement of arm 40, the to the dotted line position `58`shown in Figure 2. 20 limits dotted line position in Figure 2 indicating its The quick cracking or partial- Äopening of the uppermost position when the choke valve I1 is choke valve I1 simultaneously admits sufficient closed and the full line position shown in Figure air to thin the 4rich fuel and allowsathe engine 2 showing the normal position when the choke to be accelerated when placed línderwits load. valve I1 is in full open position and the sole ‘ As the piston and weight of the piston rod now noid 23 deenergized. A portion of actuating arm bearing on the piston slowly sinks in the liquid under dashpotf action, ¿the choke valvev I1 uni 25 40 protrudes outside the cylinder C and this por tion is provided with a longitudinal slot 43 which formly and progressively‘opens to the full line co-operates to furnish adjustment of the choke position shown in Figure 2, >allowing a greater valve I1. 30 ‘ i _Y _ A connecting rod 44 is provided near the low er end with a ball and socket joint 45 to accom amount of air to enter‘the carburetor as the valve opens. ' ‘ ` modate swinging movement of the rod. 'I'he lower terminal of the connecting rod' 44 has an oiïset threadedV stem 46 which extends throughv If the engine is warm when it is4 started, and 80 it is necessary to choke the engine by closing the choke valve I1, the cylinder C having a high coeñ‘icient of thermal expansion, will have ex panded by the heat radiated fromthe cooling nut 41 which secures the connecting rod and arm' together. The upper end of connecting .rod 44 is system of the engine on which the cylinder is mounted. In this case, there will be greater 35 35 the slot 43 in Varm 40 and this stem receives the connected to the outer end of link I9 which turns the choke valve shaft I 6. This connection is shown atv 48 and consists of forming anout set teat on the end of the connecting rod which passes through an opening in the end of link I9 and the inner end of the teat is prevented from detachment by the cotter pin extending through an opening in the teat all of which is shown in Figure 1. Since fthe nut 41 makes a fixed con clearance between the wall of the cylinder C and the periphery- of the piston 35 thereby allowing quicker movement of the choke valve because the liquid of the dashpot will be displaced in ac cordance with the proportional increase in the 40 clearance'space, and this quickened movement prevails throughout the entire range of move- ’ ment of the pistonv rod. Since there is a normal clearance 60 between the peripheral edge of the nection between the connecting rod 44 and the . piston and the wall of cylinder C. the oil or arm 40, the ball and socket joint 45 permits the other liquid in the clearance space will act as connecting rod> to have a swivel joint in its an insulator and prevent a substantiahamount length which is necessary in translating move ment from., the actuating arm to the1link`I9. To permit circulation of air in the cylinder C, I make openings 49 in the sides of the upper part 20. I also prevent liquid in the dashpot 55 chamber 21 from getting into- the solenoid coil 23, bysecuring a rubber or fiber washer 5I in the lower end of the upper part 2li of cylinder C. Electricity to operate the solenoid 23 is sup plied from a battery 52, which is grounded at> 53, by an electrical conductor wire 54 which con ductor wire connects with the switch 55 on the panel A. Leading from the switch and connect ed to the solenoid coil 23 is an electrical conduc tor wire 56. 'I'he solenoid is grounded at 51. 65 The parts of` my choke valve control arevsub stantially in the position shown in Figure 2, when the engine B is at rest. In starting the engine B, switch 55 is closed at the same time the starting motor for the engine is brought into operation. -By closing switch 55, solenoid 23 is energized and piston rod moves upwardly with the valved piston parts in the position shown -in Figure 3, which action closes choke- valve I1 to the dotted line position I8 shown in FigureY 2. 75 When the-cylinders of the 'engine have been of heat from expanding the piston tò\ corre spond with the expansion of the cylinder G. An appreciable quickening effect is noticeable from 50 the thermal expansion of the cylinder C on the return stroke of the piston Vrod~when initially starting a cold motor because some heat is ‘im parted to the cooling water and transferred to the cylinder C during the interval of time the 55 device is in operation. In Figure 2 of the drawing I- have shown one way of fastening the solenoid 23 in the upper part 20 of cylinder C, although other ways of fastening may be devised. In assembling the solenoid 23 in the upper part 20, the said sole noid is slid into the upper part of the cylinder until the customaryv fiber or rubber v_washer 53 that is found -at the top of the conventional sole 65 noid abuts against .small outstanding teats 62» near the top of'part` 2U. These teats may be‘-v made by making indentations in the walls of the upper part 2U of the cylinder as shown, or they may be made in other ways. After the solenoid is inserted _in the u er part 20, then the upper part “is screwed into the lower part 2| until. the free' edge of the lower part bears against the shoulder 64 on the upper part 20. In the screw Joint 22, a hole is then drilled and tapped with 75 2,121,392 4' the solenoid, said connecting means including an -threads to. receive the screw Il. This screw O_I actuating arm pivotally connected with tbe oll is screwed into the hole until the inner end ex tends into the cylinder under the über or rubber washer il on the bottom ot the solenoid 23, and the inner end of the screw prevents the solenoid inder and engageable with the free end of the piston, and a connecting rod adjustably con nectedtotheactuatingarmand connectedwith 5, the choke valve.l . from becoming dislocated in the cylinder during _the contraction and expansion of the cylinder under the iniluence of the heat of the cooling system. 10 with a water cooling system, the combination .with a normally open choke valve ofY the car . Having described my invention, what I claim 1. In anv internal combustion engine equipped n with a cooling system, the combination with a normally open retractile choke valve of the car 15 buretor thereof, oi' manually controlled electro magnetic means for moving the choke valve in one direction opposed to the direction' of the re buretor thereof, of a cylinder formed of a metal 10 having a relatively high coemcient oi thermal expansion, an electro-magnetic means mmmted in a part 'of the cylinder for urging the choke valve to closed position upon the energimtion thereof, means for connecting the electro-mair 15 netic means with the choke valve. a. dasbpot tractile force, and a dashpot provided with a chamber containing liquid in another part of the cylinder, a piston in the liquid in the dashpot chamber and connected with the electro-mag netic means to resist movement thereof, said cyl 20 variable rate o! ,movement _within the limits ot its stroke to retard `the _retraction of the choke ' inder positioned in the area of the cooling sys valve upon the release `o! the electro-magnetic tem of the engine in heat exchange' relation means, and the entire range' of the movement of the dashpot further controlled by the tempera ture of the coolingsystem. - /t , 2. In‘an internal combustion engine'thr, com pension of the said cylinder as influenced by the 25. temperature ofthe coolingsystemof the engine. ` bination with a normally open choke valve there 6. In an internal combustion engine, the com oi', of av cylinder, a solenoid mounted in a-part _ bination with a normally open choke valve of the chamber in another a cylinder, a solenoid of the cylinder, a dashpot part of the cylinder, a magnetically responsive mounted in ‘an intermediate portion thereof, a 30 30 piston rod extending through and-projectingl dashpot chamber containing liquid in another from each end of the solenoid.' a portion of the portion thereof adjacent the solenoid, a magneti piston rod_ extending into the dashpot chamber 'and another portion forming the core of the solenoid, a valved piston on the portion of the piston ‘rod in the dashpot chamber counter movement of the piston» rod relative to: the magnetic force, connecting means between the free end of the piston rod and the choke valve, and means for supplying electricity to energize the solenoid. Y cally responsive piston rod forming a core inthe solenoid and'proiecting from each end thereof, one. projecting end of the piston rod disposed in ti the liquid o! the dashpot chamber, a valved pis tononthepistonrodintheliquidofthedashpot chamberresistanttothepassageofthepiston 'throughtheliquidinadirecüonoountertothe , ‘ 3. In an -internal.combustion engine, the oom bination with a normally open choke valve there of, of a cylinder, a solenoid mounted in a part of the cylinder, a dashpot chamber in another part oi-the cylinder, a magnetically responsive piston rod extending through and projecting fromeach end of the solenoid, a portion ot the the tree end of the piston for operating the choke valve in response to the movement of the- piston rod, manually con trolled means for supplying electricity to energize the aolmold. said valved piston being movably moimted on the piston rod for limited movement toredueeresistancetothemovemmtofthepis into the dashpot chamber - and another portion „forming the core of thel solenoid, a piston-on the portion of the piston rod in the dashpot chamber resistingeoimter . movement of the piston relative to the magnetic force, connecting means between the free end _ ot the piston rod and the choke valve. _means i’oi'l supplying electricity to energile the solenoid. and the cylinder` formed of metal of a high eoemcienti . ofv thermal expansion so as to control the move-' ment of the piston in accordance with tbe tem- " `perature of the engine _ ' . 4. In an internal combustion engine, the oom- v bination with a normally open choke valve there of, of a cylinder, a. solenoid mounted in a part , of the cylinder. a magnetically responsive piston ' rod extending through and projecting from each end oi the solenoid, a portion of the piston rod extending intothe dashpot chamber and another . portion raming the the nolmoid, a _ rod in the dashpot " on the portionot the , , movement relative to" ‘ chamber resisting counter l 7o -the magnetic force, connecting means between _the free end ot the piston rod andthe choke'_. valve, means for supplying electricity to en CERTIFICATE OF CORRECTION. Patent No. 2,121,592° June 2l, 1958. FANDEL ASHWOR‘I'H. of the above numbered patent requiring correction as follows: Page LL, second column, line-6h, claim 8, for the word "well" read will; and that the said Letters Patent should be read with this correction therein that the same may conform >to the record of the case in the Patent Office. Signed and> sealed this 5th day of July, A. D. 1958. (Seal) A Henry Van Arsdale, Acting Commissioner of' Patente.