US1743236A - Means for supplying fuel to charge-forming devices - Google Patents

Description

Jan. 14, 1930. A. G. REDMOND MEANS FOR SUPPLYING FUEL TO CHARGE FORMING DEVICES vFiled. Aug. 18. 1922 3 Sheets-Sheet .www

MN, m, Vllllll lllllllLrlw Jan. 14, 1930. A. G. REDMOND 1,743,236

MEANS FOR SUPPLYING FUEL TO CHARGE FORMING DEVICES lil atto: neu

Jan. 14, 1930. i A, G, REDMOND 1,743,235

MEANS FOR SUPPLYING FUEL To CHARGE FORMING DEVICES Filed Aug. 18, 1922 I5 Sheets-Sheet 3 Patented Jan. I4, 1930 ALBERT G. REDMQND. F FLINT, MICHIGAN l MEANS Eon sUrPLYINe `rtiEr. 'ro CHAEGE-EOEMNG DEVICES Application led August 18, 1922. Serial No. 582,574.

This invention relates to certain new and useful improvements in means for supplying fuel to charge forming devices used in connection with internal combustion engines, theobject being to provide means for supplying fuel from the fuel tank to the charge forming device -in the form of an electric pump operatedfrom the source of energy det vrived from the internal combustion engine and so controlled that the pump will be operated automatically. Another and further object of the invention is toy provide a pumpwhich is operated by an'electromagnet energized intermittently so as to pump the fuel from the fuel tank which is placed on a level below the charge forming device whereby an ample supply of fuel will be obtained irrespective of the vacuum in the manifold so as to overcome the difficulties now. existing in vacuum systems used for this purpose.

Another object of the invention is to provide a novel form of electromagnet pump in n which the piston is raised by the magnet 'and 2 drops when released so as tok force the fluid out of the cylinder of the pump through the gas line either into a supplemental tank or directly to the charge forming device whereby a constant supply will beobtained, the stroke of the piston of the pump being determined by the consumption of the charge forming device.

Another and further object lof the invention is to provide means for supplying fuel 5 to a charge forming device which is exceedinglyslmple and cheap 1n construction and -one which can be readily attached to any of the Well known makes of motor vehicles now in use. j

Other and further objects and advantages of the invention will be hereinafterset forth Land the novel features thereofdeflned by the appended claim.

In the drawings, v Figure l is a diagrammatic view showing the application of my improved constructlon of `means for supplying fuel to a' charge forming device used in connection with an internal combustion engine on a motor vehicle;

\ 5' Figure 2 is a vertical section through the fuel tank showingv the pump in position therein;

Figure 3 is a diagrammatic view showing the Wiring system and the timing device for making and breaking the circuitV for intermitvl tently energizingthe electromagnet so as to operate the pump y Figure 4 isv a detail section of the timing device V Figure 5 is a top plan view withthe casing broken away; and y Figure 6 is a diagrammatic View showing an auxiliarytank or gage used in connection with the means for supplying fuel to the charge forming device to enable the fuel tt be supplied to the charge forming device by gravity from said auxiliary tank or gage.y

In the drawing l indicates the frame of a motor vehicle, 2 the internal combustion engine, 3 the charge forming device and 4 the fuel tank which is located in a plane belowV the charge forming device. y

y In the embodiment ofv the invention as herein shown the pump is placed in the fuel tank 4 but am aware that the pump for supplying fuel to the charge forming device can be placed outside of the tank 4 at any point desired and therefore I do not wish to limit myself to the placing of the pump at any particular point, as I have found in practice that a pump located Within the fuel tank or on the outside will operate successfully so as to pump the fuel to the charge forming device. y As shown in the drawing, an opening is formed in the top of the tank 4 around which is placed a collar 5 on which is seated a'llange 6 of a cylindrical casing 7 which is provided with a reduced neck portion 8 at its lower i end through which extends the upper end of A a tube 9 which is secured in the upper end of' a pump cylinder 10, the lower end of which is threaded and in which is screwed an aper-- tured cap 11 above which is arranged a cylindrical check valve 12 having grooves 13 in its peripheral Wall for allowing the fuel in the tank 4 to by-pass the check valve.

In practice I preferably arrange a strainer over the plug l1 andwhile I have shown the end of the plug arranged in close proximity to the bottom of theftank, it is, of course, un-

derstood that when a strainer is used, the pump cylinder is disposed in a higher plane and by having the inlet to the pump cylinder close tor the bottom of the tank, I am able to practically drain the tank.

The pump cylinder is provided with a lateral Offset having an outlet passage 14 to which is connected a valve casing 15 provided with a ball cneck valve 16, the upper end of The tube 9 and the cylindrical ,casing 7 form an annular chamber in which is arranged a solenoid 19 formed of a coil of wire wound around a tube 2O and while I have shown this particular constructionl of solenoid, it is, of course, understood that I do not wish to limit myself to the use of such apmag-l net for operating the piston in the pump as I am aware that various forms of electromagnets can be used without departing from the spirit of my invention.- l

Slidablyl mounted within the tube 9 is an armature 21 to which is pivotally connected a piston 22, the downward movement of which is limited by a bar 23extending across vent the upper end of the tube in order to al-` the pump cylinder which also limits the upward movement of the check valve 12. The tube 9 is provided with an openingf24 and the armature 21 is grooved as shown at 25 to low the armature to reciprocate up and down in the tube as the solenoid .is energized and deenergized. A

lAs the current flows through the coil of the solenoid, the armature is drawn upwardly and when the current is interrupted, the armature is releasedand the piston andarma- .ture drop by gravity so as to force the fluid out of the pumpv cylinder through the fuel line pipeto the charge .forming device. I have .found fin practice that the piston in the operation of the device on an internal com bustion engine in a; motor vehicle floats on top of a certain amount of fuel so as. to hold the fuel under pressure, whereby a practically l' constant supply obtained and by this particular construction of'pump, the fuel supply4 is automatically regulated by the consumption of the fuel, as when the piston is' supported by the fuel within the pump cylinder,

' the stroke of the piston is reduced and as the consumption is increased, the stroke of-tlie piston increases whereby I amable to supply fuel constantly to an internal combustion en- In the drawing I have shown a timing de. vice for making and breaking the circuit for 'Supplying electrical energy to the solenoid for energizing the same; controlled by the speed of the engine but I am aware that this canl be accomplished in various other ways and while in practice I have found a timing device constructed as illustrated in the drawing proves entirely satisfactory, ,I do not wish to limit myself to the use of any particular construction of timing device for making and breaking the circuit or to the use of any y particular meansfor driving said timing device as I am aware that 1t can be driven 1n various ways without departing from thel spirit of my invention.

In Figure 1 of the drawings 26 indicates the pump shaft of the internal combustion engine of the construction now used on a Dodge automobile as I have found .that this rshaft can be readily used fordriving the timing device so as to energize the electromagnet every twenty revolutions of the motor which I have found to be sufficient to amply supply the charge forming device with fuel, but, of

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course, I am aware that in diHerent size motors it may be necessaryto increase 'the number. of-times that the magnet is energized or" to increase the size of the pump and magnet,"

especially the weight of the piston as the conl struction of the lpumpherein shown is what might be termed a displacementpump, as the weight of the piston and armature forces :the fuel -by their weight out of the'cylinderl of thepump whereby a practically constant supply is obtained.

In Figure 3 I have shown diagrammatically the wiring system andtiming device which I havev used for energizing the electromagnet intermittently,- althou'gh I have found that a two-wire system instead of'a .Singlewire system can be used with good results, but in orderto simplify the wiring of.,

the device I have ill strated a` single wire system in which the .pump is grounded as shown at 27 and the battery 28 is grounded l In constructing the timing device I employ a housing 30 provided with a bearing 31 in which is mounted a shaft32 which is'h'erein shown coupled to the pump' shaft f the motor, said shaft beingfprovided with. a. worm 33 on its outer end which meshes with a worm wheel34`. carried by shaft 35, mounted. in suit- `able bearings 36 so as to 'reduce the'speed of the shaft 35;

l Secured within the-housing is a fiber block 37 on which is secured a flexible strip 38 providd with a contactpoint 39 adapted to engage an.. adjustable contact 40 carried by a `fiber block 41, said strip being adapted to be" engaged by a fiber cam 42 carried bythe shaft 35 in order to force said contacts into engage 'ment with one another so as to complete the circuitV whereby the electromagnet will be t energized.

The strip or spring 38l is connected to bat-v tery 28 by a wire' 4 :3 having a switchM; which may be the ignition switch of the electrical system' of the motor vehicle. The contact 40 1s connected to a binding post 45 by a wire 46, which binding post is connected. to one end of the coilof the solenoid as shown at 47 by a wire, the other end of-the wire of the coil being grounded as herein shown by a wire'48 connected to a plug 49 arranged in the 'end of the tube 9, but, of course, I do not wish to limit myself to the manner of connecting ythese wires to the solenoid and grounding .thesame The binding .post 45 is arranged in a de'- l l tachable cap 5() secured over'the top ofthe cylmdrlcal casing 7 by screws 51 and by this particular construction of securing the electromagnet in position within the casing, I am able to remove the magnet from the casing and the pump and magnet as a unit from the tank.

The construction of timing device as here i illustrated makes a circuit every twenty revolutions of the motor so that the magnet is energized intermittently so -that the piston of .the pump makes a stroke every twenty revolutions of the motor and as the stroke of the piston is determined bythe consumption of the fuel, I am able to supply the charge forming device on a motor vehicle with an ample supply of fuel under all conditions so as to ,forming device by an automatically con-v trolled electrically operated pump so that a constant supply of fuel will be furnished to ably mounted in saidI tube, a piston carried by the lower end of said armature working in said pump cylinder, inlet and outlet valves to said pump cylinder-and means for energizing and deenergizing said solenoid controlled by the engine for lifting said piston.

In testimony whereof I `hereunto affixvmy signature.-

` ALBERT Gr. REDMOND.

overcome the difliculties now existing with the fuel supplying means now in use.

In order to provide means for initially sup- -plying fuelto the charge forming device without cranking the motor to which the charge forming device is attached, I connect the 4battery 28 to the solenoid by wire 57 which is provided with a switch herein shown in the form of a push-button 58 which can be located at a convenient place so that by pushing the button, the solenoid will be energized so as to operatethe pump. This also enables the operator to supply additional fuel to the charge forming device as desired and provides a novel and simple means for supplying fuel which is under the controlof the operator independent of the automatic supplying means.

In Figure 6 I have diagrammatically illus'-K trated my improved construction of fuel supplying means used'in connection with an auxiliary tank or gage 52 into which the fuel is forced through a feed line 53 by a pump con- Nstructed substantialhy1 the same as shown and described, saidtank aving an overflow pipe 54 extending back into the fuel supply tank 4 So that fuel will be maintained `inthe tank or gage 52 at a predetermined level at .all times from which it can be supplied to the charge 'forming device 3 byapipe' 56-by gravity. 1 certain details of construction of forming the pump and the electromagnetyIdo not wish to v While in the 'drawings I have'illustrated limit myself Ato these details as my invention consists broadly in jproviding means for sup plying fuel from the fuel tankto the charge riov

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