US1482666A - Hydrocarbon motor - Google Patents

Description

Patented Feb, 5, 1924.

which the following is a specification. y

ii aaa crear uur-ca.,

MILTON TIBIBETTS, OF DETROIT, MICHIGAN, ASSIGNOR T0 PACKARD MOTOR CAR COM- PANY, 0F DETROIT, MICHIGAN, A CORPOMTIQN 0F MICHIGAN.

uvnnooannoiv moron.

application med February 1c, 1920. serial u. ssaear.

To all whom t may concern.'I

Be it known that 1, MILTON Tisnr'rs, a

citizen of the United States, and resident of Detroit, `Wayne County, State of Michigan, have invented certain new and useful Tmprovements in Hydrocarbon Motors, of

This invention relates to hydrocarbon motors, and particularly to fuel feeding means therefor.

The Stewart vacuumoperated feed tankis well known in the hydrocarbon motor industry. One form ofsuch tank is shown in Patent No. 1,158,924: to Webb Jay, dated November 2, 1915. This invention conteniplates the use of the type of tank vdescribed in said patent and the vacuum operated float means of that patent is illustrated in this application.

`The present invention is particularly-designed for use with a hydrocarbon motor having a carburetor of any desired form.

using liquid fuel, and having also a fuel heater device using a mixture of gasoline or other liquid-fuel and air for its operation, such heater devices being known generally as combustion heaters.

One of the objects of the present invention is to provide a fuel feeding device adapted to feediliquid fuel to the motor carburetor and at the same time to feed a combustible mixture to a combustion heater such as is referred to above.

Another object ofthe invention is to provide a fuel feeding device in which there are two feed tanks or chambers from which fuel may be drawn for the motor. Preferably, one of these tanks or chambers feeds liquid fuel only and the other feeds fuel and air.

Other objects and advantages will appear from the following description taken in connection with the drawing which forms a part of this specification, and in which the figure represents a vertical section through a fuelV feeding device embodying the invention.

Referring to the drawing, 10 represents a primary chamber or a fioat chamber or tank similar to the inner tank of the well known Stewart vacuum supply tank. This tank 10 is preferably formed of sheet metal and is secured as by screws 11 to a top 12, which may be a castin as shown. .A pipe 13 sup# the tank 10 so that va certain amount of vacuum or suction isv required to draw the fuel upwardly through the supply pipe 13. The pipe 13 opens into the tank 10 at 14.

The primary tank 10 is also connected with the motor intake pipe abovetheV throttle by means of a pipe 15, communication through the cover 12 being by means of a4 port 16 which is controlledvby a valve 17'. The tank is also vented to the atmosphere Gil through a pipe 18 and a port 19, which latterY y portis controlled by a valve 20.

Thus when the valve 17 is open and the valve 20.is closed, the engine suction is ,permitted to edect a reduction of pressure Within the primary tank 10, causing a 'dow of fuel through the pipe 13 into the tank 10 and causing the doat 21 therein to rise. The float is connected, however,.:by a lever 22 and link 23V to an arm 24: fulcrumed coaxially with a lever 25 and s erving to support one end of a tension spring 26 whose opposite end is 4connected to the outer end of saidlever 25. The spring 2 6, thus tending to fold the members 24 and 25 toward each other, either above or below their fulcrum, serves to resist the rise of the oat 21, since it would cause an unfolding of said members and the rise of the float is consequently delayed until the buoyant force of the constantly incomn liquid is sucient to overcome the e'ect o the spring 26. The float then rises suddenly to its upper limit of movement, throwing the parts to the positions indicated in fulllines in the drawing. The pull of the spring 26 causes sucient upward swing of the lever 25 to unseat the air valve 20 and to seat the valve 17, thus cutting off the engine suction andy restoring atmospheric pressure within the chamber 10.

This permits the fuel accumulated in the chamber to How out'at'the bottom past a flap valve 27 arranged in theoutlet pipe 28 threaded into the bottom of the tank 10.

Usually inthe Stewart t pe of vacuum feeding device, the fuel ows from the float chamber directly into a feed tank which supplies the motor carburetor. lin the present invention, however, there is an intermediate tank or chamber. 29 which is shownV as surrounding and as somewhat `larger-than the primary tank 10, and the fuel from the tank 10 flows into this second or intermediate tank 29. The tank 29 is also secured to the top 12which is extended be- 'is a third tank 32 which is the carburetor feed tank. A series of bolts 33 extend through the top 12 and through the flanges of the tanks 29 an-d 32, thus securing those tanks to the top. The tank 32 is also vented to the atmosphere through a passage 3l formed in the top and communicating with the vent pipe 18 above referred to. The outlet from the tank 32 is shown in the form of a pipe 35 which leads to the usual motor carburetor.

It will be seen that in the normal opera- I tion of the device, the fuel will pass from the primary tank 10 into the intermediate tank 29, and so much of it as overfiows the stand-,pipe 31 will pass into the feed tank 32 thus supplying the mot-or carburetor with fuel, and under these conditions there will always be maintained a level of liquid fuel in the intermediate tank 29 approximately at the top of the Stand-pipe 3l as shown in the drawing. Of course, under some conditions, if the motor is idling for sometime 4and thereby using very little fuel but is creating a high vacuum in the intake header above the throttle, the operation of the mechanism in the primary tank 10 may cause the fuel vinthe feed tank 32 to rise slightly above the top of the stand-pipe 31 and consequently the level in the intermediate tank will also be somewhat above the top of the stand-pipe. However, this is not a usualcondition and a slight rise in the level in the intermediate tank is of little consequence.

For the purpose of supplying a mixture to a combustion heater or other similar" device on the motor, a carburetor 36 is mounted in the cover 12. This carburetor' is of the compensating type and draws both fuel and air from the intermediate tank 29. Said tank is adapted for this purpose because of the substantially constant level of liquid fuel therein, and as the small carburetor herein contemplated uses very little fuel, the level in the tank 29 will not iuctuate to any extent between the dumping operations of the primary tank 10.

The carburetor 36 above referred to extends from the top 12 downwardly into the tank 29 nearly to the `bottom thereof. This downward extension is in the form of a tube or well 37 having air openings 38 near its upper end and having a telescoped inner tube 39 whichsis open through a restricted port 40 to the fuel near the bottom of the tank 29. There are a series of transverse ports 41 in the inner tube 39`and near the lower part thereof, thus providing communication between the interior of said tube 39 and the well 37. The tube 39 extends upwardly to outlet ports 42 at a restricted part 43 of an air passage which surrounds the upper part of the tube 39. This air passage receives air from the upper part of the tank through port-s 44 and passagest. The mixture produced at the restricted passage ,i3 is carried into a pipe 46 which leads to the combustion heater.

From the above it will be seen4 that the carburetor 36 is an integral part of the fuel feeding device and withdraws both liquid fuel and air from one of the tanks of the device. At the same time the feed of liquid fuel to the motor carburetor is in no wav interfered with.

A specific embodiment of the invention has been described in detail and will be specifically claimed, but it will be understood that the invention is not limited to the exact details of construction shown, as it will be apparent that changes may 'be made without departing from the spirit or scope of the invention.

Having thus describedl my invention, what I claim and desire to secure by Letters Patent is:

1. A fuel'feeding device comprising a float chamber and means for supplying liquid fuel thereto, a chamber connected to the outlet of said float chamberandy having a continuously open overflow. outlet, and afeed chamber connected to receive the overflow 'from thesecon'd'chamber and having a feed outlet at the bottom.

2. A fuel feeding, device comprising a chamber and means forrfeeding fuel thereto, a second chamber surrounding the first chamber and adapted to receive fuel therefrom, said second chamber having an over.

flow some distance above its bot-tom, and a third chamber surrounding the other chambers and adapted to receive they overiow from the second chamber, the second chamber and its overfiow being the sole means of communication between the first and third chambers.

3. A fuel feeding device comprising a' primary chamber havin means for feeding fuel thereto, two cham ers adapted to receive fuel from said primary chamber, and means for withdrawing fuel 'from said two receiving chambers.

4. A fuel feedingv device comprising a ibs primary tank and vacuum means for supply` lng fuel thereto, `slaid tank having a valve outlet at its bottom, an intermediate tank adapted to receive the fuel from the primary tank and having a stand-pipe therein, a feed tank connected to receive the overflow of lthrough said intermediate tank and its outlet.

G. In a fuel feeding device, the combina-` tion vwith a primary tank havin vacuum operated means therein for supp ying the tank with liquid fuel, an intermediate'tank adapted to receive the fuel from said primary tankand having an outlet labove the bottom ofthe primary tank, a feed tank adapted to receive the overflow from the intermediate tank, and a carburetor extending into the intermediate tank and adapted to draw fuel and air therefrom.

" 7 In a fuel feeding device, the com-bination with a primary tank having vacuum operated means therein for supplying the tank with liquid fuel, an intermediate tank adapted to receive the fuel from said primary tank and having an outlet above the bottom of the primary tank, a feed tank adapted to receive the overflow from the intermediate tank, and a carburetor havinga secured to said to fuel well extending into the intermediate tank below the liquid level therein. Y 8. In a fuel feeding device, the combination with a feeding tank havingfa top to which it is secured and having a\ fuel outlet at its bottom, an intermediate tank also secured to said top, said top havinlg. air vents for both of said tanks, a float tan also 'and havin into said intermediate tank, an means for supplying said float tank with liquid fuel.

an outlet 9. In a fuel feeding device, the combination with a tank having vacuum operated;

fuel supply means, and means for withdrawing liquid fuel from said tank, of a carburetor extending into said tank and adapted to draw vfuel and air therefrom.

10. In a fuel feeding device, the combination with a tank having lvacuum operated fuel supply means, of-means for withdrawing liquid fuel fromthe bottom of said tank, Y

and a carburetor extending into said tank and adapted to draw fuel and air therefrom.

11. In a fuel feeding device, the combinationwith a tank havinga vented compartment and having vacuum opera-ted fuel sup; ply. means, of means for withdrawing liquid lfuel from the bottom o f said tank, and a-carburetor supported on top of said tank and adapted to withdraw mixture therefrom.

12. ln a fuel feeding device, the combination with a tank having a yente'dfcompartf Y* ment and having vacuum operated fuel su ply means, of means forwithdrawing liquid fuel from the bottom of said tank, and a carburetor, independent of said 'fuelwithdrawing means, connected to said'tank to withdraw fuel therefrom by theaction of the carburetor. i

13. In a fuel feeding device, the combina' tion with a tank and a vacuum operated'lfuel supply means therefor, of means for withdrawing liquid fuel from the bottom of said tank, and a carburetor acting independently of said vfuel withdrawing means and connected to be supplied by said tank at a `level of liquid fuel'therein.

14. ln a fuel feeding device, the combination with a tank and vacuum operated fuel supply means therefor, of means for withdrawing liquid fuel from the bottom: of said tank to supply la main carburetor, and an auxiliary carburetor so mounted and connected to said. tank that it is supplied with liquid fuel at a fuel level in said tank.

In testimony whereof l aflix my signature.

MILTON' rinnn'rrs.

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