US991152A - Liquid-fuel-control system. - Google Patents

Description

2 sums-slum 1.

G. T. HANGH ETT. LIQUID FUEL- CONTROL SYSTEM. 4 I APPLICATION FILED JUNE 10, 1909.

' Patented May 2, 1911.

G. T. HANO'HETT.

LIQUID FUEL CONTROL SYSTEM APPLICATION FILED JUNE-10, 1909.

991,152. v Patented May 2,1911.

2 SHEETSSHEET 2.

wi/lwm 95c o arana @11 11311 GEORGE TILDEN HANCHETT, 0F HACKENSACK, NEW JERSEY.

Specification of Letters Patent.

LIQUID-FUEL-CONTROL SYSTEM.

Patented May 2, 1911.

Application filedil'une 10, 1908. Serial No. 501,392.

trol Systems, of which the following is a full, clear, and exact description.

My invention relates to improvements in liquid fuel control systems and has for its object to provide a new and improved means of controlling the'supply of liquid fuel to carbureters and the like.

The following is a full, clear and complete description of my invention, such as will enable those skilled in the art to make and use the same, reference being had to the accompanying drawing, in which, I

Figure 1 shows a plan view of. the carbureter, and, Fig. 2 shows a vertical section of the same on the line m-m Fig. 1. I ig. 3 shows a modification of circuits.

Referring more particularly to the draw ings, l is a mixing chamber containing a coil pipe 2 for hot water having a plurality of vertical series or turns-each separated by a vertical wire screen Above the coils is a plate 4 having perforations 5 for the passsage of the mixedgas and air, which mixture ultimately passes through the port 6 to the cylinder. The port 6 is controlled by a. damper? operated by the lever 8. Below the lower Wall 9 of the mixing chamber is a constant level cup 10 containing a float 11 pivoted to the body of the carburetor at 12. Connected to this float is a lever arm 13 whiclractuates a rod 14 causing it to engage and disengage the upper end of an adjustable screw contact 15, within a liquid pocket 16, which is connected by orifices 16 with the ponstant level cup 10. The liquid pocket 16 is supplied with liquid fuel through the pipe 17 which is controlled by the valve 18, seating on the seat 19, the fuel being suppliedunder pressure from any convenient source through the pipe 20. Above the plunger of the valve 18 is an elec tromagnct consisting of the winding 21 and the core 22 having a non-magnetic casing.

21. The winding 21 of thc clcclromagnci has one terminal connected to the core 3'2 of the magnct so as to bc groundcd and thc olhcr lcrminal thereof is connected with ono v tcrmiual of any suitable source ol clccirni current whose other terminal is grounded,

such for instance as the electric battery 23, which supplies the spark coil 24.

In the arrangement shown in Fig. 2, the winding 21 of the electro-magnet is in series with the counnutator-26. This does not. however, seriously a'tl'ect the. action of the electro-magnet in carrying out its function. In the arrangement shown, the spark coil 'has one terminal connected to the spark plug 25 to ignite in the engine cylinder in the ordinary manner the mixed air and gas supplied theretofromthe carburetor and is .coutrollcd by the"commutator 26. \l'ithin the core of the electromagnet is a spiral spring 27 which bears upon a plunger 28. connected to the valve 18. there being a space between the upper end of the valve 18 and the clecl'romagnet so that when the. clectroanagnct is energized, the valve 18 can bc li't'tcdfrom its valve seat 19. Profcrably the valve 18 has an extended magnetic face 29. The spring 27 assists gravity in returning the valve 18 to its seal.

30 is a spray nozzle within the central chamber of the carburetor having a controlling needle valve Z-ll. The space outside the nozzle constitutes a spray chamber. Thc nozzle ?0 is connected with the chamber in by passage 32 so that oil in the passage 32 flows to the spray nozzle and when the fuel in the chamber 1.0 is at its normal height, and when under normal pressure, rises to the mouth of the nozzle 30.

33 is an air passage leading to the atmosphere and connected through the check valve Isl with the inner chamber of the carburctcr.

$35 is a passage connected with a source of compressed air. 313 is a three-way cock. \l'hcn the cock 36 is turned so as to connect the com'prcsscd air source with the iuncr carburclcr chamber. the compressed air is supplied through it to the engine cylinder for thc purpostxot' starting thc-cuginc.

37 is a port connected with the utmosphcrc so that when l'hc cock So is turned so as to cut oil' the compressed air. the chamber within the carburcicr councctcd with the almosphcrc directly through the port iii. The conrlani lcvcl clnunbcr it) is conucclcd with thc intcrnal chamber of tho carburctcr through a ('mhil'it'itll orilicc 3S and to the atmosphcrc through a constrictcd oriiicc 39 and a passagc l0 controlled by a chcck valve 1 11. The spring 27 can be adjusted by tho screw 42 which bears upon the upper end of the same. The contact 15 is insulated from the metallic portions of the earbureter by insulation 43. The electroniagnet can be controlled in various ways. In the particular arrangement shown the windin 2110f the electromagnet is shunted when the plunger 14: engages the contact 15 so as to be out of circuit, the shunt consisting of the conductor 44 and contact 15 to which it is connected, plunger 14, and casings of the carburetor and electromagnet and the core 22.

4:5 is a manual switch which interrupts the circuit of the battery 23 when desired. \Vith the switclr45'Tocated as shown, the valve 18.is closed whenever the ignition is cut out.

Inthe operation of the apparatus, when the cup 10 is empty or below normal, gasolene or other liquid fuel enters the constant level cup through the valve seat 19, passing the plunger 18 of the control valve. As it enters the carburetor it passes through the pocket 16 and thence into the constant level cup 10, and continues to flow until the float 11 is raised so as tobring the plunger 14. into engagement with the contact 15. This short circuits the winding 21, deenergizing the elcctromagnet. and perinitsthe-valve 18 to close. The level in the cup 10 is maintained at any desired point by the float 11, thus when the level in the fluid constant level chamber 10 falls the float 11 falls, lifting the rod 14 and breaking engagement with the contact 15. This interrupts the short circuit made by the conductor 44 around the electromagnet causing the electromagnet to become energized and lift the valve 18 so that the liquld flows through the valve seat 19 into the cup 16 and thence through the orifices 16 to the chamber 10. \Vhen the chamber 10 has become filled to the desired level, the float 11 rises causing the plunger 14 to engage the contact 15, thus completing the shunt through the conductor -14, deenergizing the electromagnet and permitting the valve 18 to fall so as to close the valve at the valve seat 19, as above described. The valve is made to novc down by any convenient means such as the spring 27 above referred to. In this'way the fluid in thechamber 10 is maintained in constant level whenever the battery 23 is in circuit, the result being accomplished by the automatic float control of the'elcctric circuit through the clectromagnet, without, however, causing any interruption of. the circuit through the battery 23 or the. spark coil. \Vhen the engine is in operation. atmospheric air enters the carbureter through the check valve 3-.t and passing the nozzle 30 mixes with the spray therefrom and thence passes to the vaporizing chamber 1, in which the mixing and vaporizing takes place, thence outward through the outlet 6. The screens 3-3 prm duce a thorough mixing of the fuel and air and the heat from the hot water pipes 2 which are connected to any convenient source, preferably the coolingjacket of the engine, volatilizes the fuel so as to reduce'it to a gaseous state.

-VVhen the engine is started by the compressed air, the compressed 'air is admitted from the port 35 through the three way cock air, does not force the liquidaway from the mouth of the nozzle and hence the liquid levels are substantially undisturbed. The compressed-air which is admitted closes the main air intake by reason of the check valve 34 and creates a pressure through all parts of the carbureter including the float chamber 10[ If while in this condition the compressed air is suddenly turned off at the cook 36, relieving the pressure in the spray chamber,the fluid chamber 10 bleeds slowly by reason of the reduced orifice 38, and the connection of the inner or vaporizing chamber with the atmosphere through the port 37. The pressure in the fluidchamber therefore for a time at least exceeds the pressure in the vaporizing chamber, which causes the liquid fuel to squirt up through the spray nozzle 30 into the vaporizing chamber-of the carburetor. If compressed air is then again readmitted, it finds abundant fuel in the vaporizing chamber from which to take up its explosive properties. The second charge of compressed air, being thus impregnated witha large amout of fuel, primes the engine so that its charge will ignite and it will continue to run after the compressed air has been cut off. Aftenthe compressed air is cut oil the engine continues to run in the ordinary manner, drawing in atmospheric air and producing a spray at the nozzle 30. In some cases a second application of compressed air may .not be necessary.

It is to be noted that the float in my carbureter does not actuate any valves mechanically. It serves merely to make and beneath the liqflid fuel in the cup 16 and sparking.

mally full, but is completed so as to energizeelectro-magnet is eliminated from the spark 'eoil circuit atall tunes and that circuit is coil 21 of the electro-magnet, its other ter- .the combination of an outlet, a sourceof is not necessary so long as it is operated I electrically in at least one direction.

It is to be noted that the engaging contact surfaces on the plunger 14 and contact 15 for controlling the electromagnet are submerged therefore there is no danger of disastrous Since the spark does-not come in contact with the air, there is no danger of explosion of the fuel or the ignition of any gases which are apt to surround the carbureter.

Instead of the circuit arrangements shown. in Fig. 2, I may employ those shown in Fig. 3 wherein elements having numerals with exponents correspond to elements of Fig. 2 to which similar numerals without exponents are applied. In this arrangement the igni; tion battery 23'. is located between the ground and the commutator 26'. The spark coil 24' is connected in circuit between the commutator and another ground, one terminal of the secondary being connected to the spark plug 25' in the ordinary way. Connected to one'terminal of the battery 23 by the conductor'46 is one terminal of the minal being connected to the contact 15, with which the plunger 14' engages. The float 11 in this case is pivoted at the other end from which it is pivoted in Fig. 2, namely, at 12, so that the engagement between 14 andl5 is made as the float falls. In this arrangement, the circuit of the elec tro-magnetically controlled valve is entirely independent of the spark coil circuit, and is broken whenever the fuel 'chamber is northe electro-n agnetic valve whenever the float 11' falls. Switch 45 cuts out the battery 2i With this arrangement, as with the other arrangement, whenever the battery circuit is interrupted between the battery and the ground, theelectroanagnet valve is deiinergized, that. is, whenever the ignition is cut off the electro-magnet valve closes. \Vith the partsso connected, the resistance of the not'afl'ected by the condition of the fuel chamber or the position of the floattherein.

'hat I claim is: 1. In a device of the character described,

liquid'fuel supply connected therewith, electromagnetic meanscontrolling the flow of fuel from said source, a circuit controlling said electromagnetic means and controlling contacts in saidcircuit immersed in said liquid fuel.

2'. In a device of the character described, the combination of a float chamber, a source of liquid fuel supply connected therewith, a valve between sa d source. and said chamber, a float in said chamber, contacts eoutrolled by said float, electromagnetic means controlled by said contacts and actuating said valve, and an outlet connected with said float chamber, said contacts being inimersed in said fuel.

3. In a device of the character described, the combination of a float chamber, a float therein, a valve leading from a source of fuel supply, electro-magnetic means controlling said valve and a shunt around said electroemagnetic means controlled by said float and an outlet connected to said float chamher.

4;. In a device of the character described, the combination of a float chamber adapted to contain liquid fuel, a float therein, contacts below the normal level of the fuel in saidchamber and brought into and out of engagement by movements of said float, an electro-magnetic supply valve controlled by said contacts controlling the level of the fuel in said chamberand meansoutside of said chamber for adjusting the point of engagcrelatively movable contacts controlling said electromagnetic device, means for moving said contacts relatively, and a pocket for liquid fuel located below the body of said fuel chamber and surrounding said contacts, and an outlet connected to said fuel chamber.

6. In a device of the character described, the combination of a fuel chamber adapted to contain liquid fuel, a supply passage leading thereto, a valve seat in said passage. a casing rising from said valve seat to above the level of the fuel in said chamber. a valve within said casing, a solenoid for actuating the same, a float within said fuel chamber. and contacts controlled by said float and ,adapted to out said solenoid in andout of circuit.

7. Ina device of the character described. the combination of a fuel chamber adapted to contain liquid fuel, a supply passage leadmg thereto, a valve seat in said passage, a casing risiu from said valve seat to above the level of the fuel within said chamber. a. valve and a solenoid for actuating the same both within said casing, a float within said fuel chamber. and contacts controlled by said Heat and adapted to cut said solenoid in and out of circuit.

8. In a device of the character described, the combination of a fuel chamber adapted to contain liquid fuel. a supply passage. leading thereto, a valve seat in said passage, a casing rising frmu said valve seat to above the level of the fuel in said chamber. a valve within said casing. a solenoid for actuating the same, a float Within said fuel chamber, and contacts actuated by said float and adapted to cut said solenoid in and out of circuit, the engaging points of said contacts being immersed and below the normal level of the liquid fuel insaid chamber.

9. In a device of the character described, the combination of a fuel chamber, a source of liquid fuel supply therefor, an outlet for said chamber, a valve between said chamber and said source normally tending to close, a casing for said valve rising above the level of the fuel in said chamber, electromagnetic means for opening said valve, and a float in said chamber controlling said electromagnetic means.

10. Tn-adevice of the character described,

the combination of' a fuel chamber adapted to contain liquid fuel, a supply passage load ing thereto, a valve seat in said passage, :1 20

casing rising from said valve seat to above the level of the fuel in said chamber a valve and a solenoid for actuating the same, both within said casing, a float in said fuel cham-. ber, contacts actuated by said float and; adapted to out said solenoid in and out of GEORGE TILDEN HANCHETT. Witnesses H. B. BRoWNELL, IDA M. HUNzntER.

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