US1258060A - Vacuum fuel-feeding system for gasolene-engines. - Google Patents

Description

H. C. SUCKERT.

VACUUM FUEL FEEDING SYSTEM FOR GASOLENE ENGINES.

APPUCAUON FJLED AUG.2?. I9I5.

Patented Mar. 5, 1918. V

M/VEA/TOI? a,

A TTORIVE Y5.

PNOTD-LETHO by SACKETT 5 \VILHELMS COiP N Y which the HAROLD C. SUCKEBT, OF NEW YORK, N. Y.

VACUUM FUEL-FEEDING? SYSTEM FOR GASOLENE-ENGINES.

, Specification of Letters Patent.

Application filed August 27, 1915. Serial 180.. 47,595.

To all whom it may concern: 1 Be it known that I, HAROLD C. SUeknR'r, a citizen of the United States, and a resident of the borough of Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Vacuum Fuel-Feeding S stems for Gasolene-Engines, of which te following is a specification.

In the installation of gasolene engines it has heretoforebeen the almost universal practice to place the gasolene or fuel tank above the carbureter in order to secure a gravity feed of the fuel from the tank to the carbureter. In the fewinstances in which the fuel tank' has been placed below the carbureter some form of pump has been used to maintain an air pressure in the gasolene tank in order to force the gasolene up to the carbureten. In other cases a vacuum pump has been used to draw the gasolene from the fuel tank to a point higher than the carbureter and to then feed the gasolene by gravity to the carbureter. This invention relates to'this lattertype of fuel feeding means.

It is the main object of this invention to simplify the vacuum apparatus by means of gasolene is drawn from the tank and delivered into the small gravity tank from which it is fed to the carbureter.

Another ob'ect of the invention is to dispense with all float-operated devices and to provide an apparatus which will be very simple in construction and positive and reliable in o eration.

Other 0 jects and advantages of the invention will appear hereinafter.

In the drawings, view of my improved fuel feeding system ap lied to 'a gasoleneengine;

ig. 2 is a vertical central sectional view of the vacuum pump and gravity feeding tank, showing the parts in the osition which they occupy when asolene is being drawn from the storage tan .into the pumping chamber'; and

ig. 3 a similar view showing the arts in the position which they occupy w en the asolene is being delivered from the pumpmg chamber into the gravity feed tank, t e pum ing chamber being cut off from communication with the suction apparatus.

Referring to the various parts by numerale, 1 designates the engine, 2 the manifold Figure 1 is an outline through which the gas from the carbureter is conducted to the engine intake; 3 the carbureter and 4 the fuel' tank. The gravity feed tank 5 is located in any convenient po-' sition above the carbureter, preferably under the hood ofthe engine as indicated in Fig.

Patented Mar. 5, 1918.

1. The lower end of this gravity feed tank is connected by a pipe 6 to the carbureten and through this pipe fuel is fed by gravity. The fuel tank 4 is connected to the pumping apparatusthrough a ipe 7 and said apparatus is connected to the manifold of the engine through a pipe 8.

Secured to the top of the tank 5 is a rigid I cap or head 9. This head is formed with a central downwardly tapered valve chamber 10 whose downwardly inclined wall forms a valve seat. Closing the valve chamber is I a top plate 11. Hi y secured centrally to this top plate an extending downwardly through t e valve chamber 10 and into the tank 5 is a rigid guide and supporting rod 12, a securing and lock nut 13 be ng screwed on the upper end thereof and bearing against the to plate. Within the feed tank, and near t e upper end thereof is a pumping chamber 14. Closing the upper end of this chamber is a flexible diaphragm 15, the inner annular edge of said diaphragm being connected to a ependin annular flange 16 formed on the head 9 within the tank 5. The outer edge of the diaphragm is rigidly secured to the upper end of the pumping chamber 14. The diaphragm 15 is sufiiciently large to permit the pumping chamber to have the desired reciprocal movement, as will be hereinafter described. The lower end of the valve chamber 10 is in communication with the inberior of the pumping chamber 14, as shown clearly in Fig. 2. On

the-lower end of the supporting rod 12 is a collar 17. The lower end'of this collar forms a valve seat 18. This collar is formed with a dependin tubular extension 19 apertured at 20. In t e bottom of the pumping chamber is secured a valve 21 sald valve sliding on the extension 19 as the pumping chamber is reciprocated. When the pumping chamber is in its upper position, as shown in Fig. 2, valve 21 is seated against seat 18 and there is no communication between the apertures 20 and the interior of the pumping chamber. When the pumping chamber is in its lowermost position, as shown in Fig. 3, the apertures 20 are in communication with the pumping chamber thereby connecting said chamber with the interior of the feed tank, as shown clearly in Fig. 3.

Sliding on the supportin rod 12 near its upper end is a sleeve 22. is sleeve is rigidly connected by tubular horizontal arms 23 with the outer wall of the pumping chamber so that said sleeve moves up and down with said chamber. In each arm is arranged a spring 24, each of said springs serving to ress a catch ball 25 into recesses 26 fOIIIlBfl lIl the supporting rod. .There are two sets of recesses 26, one above the other, said recesses ,limiting the reciprocal movement of the pumping'chamber. Between the collar 17 and the lower end of the sleeve 22 is a coil spring 27, said spring serving to holdihe pumpingl chamber in its upper position whensaid c a'mber is empty and until. it has received a predetermined quantity of gasolene.

In the valve chamber 10 is arranged a downwardly tapered valve 28, said valve being adapted to seat on the downwardly inclined wall of the valve chamber. This valve is carried by a depending tubular extension 29 which is adapted to slide on the central supporting rod 12; the lower end of said tu ular extension being in position to be engaged by the-upper end of the sleeve 22 when the pumping chamber is at, or near the end of its upward movement. The fuel pipe 7 is connected to the valve chamber through the port 30; and the exhaust pipe 8 is connected to the valve chamber through a port 31. When thevalve28' is seated it closes ports 30 and 31. Within the valve chamber 10 and surrounding the guide rod 12 is a light coil spring 32, which assists in seating the valve 28 when the pumping chamber is be sufficient suction through pipe 8 to exhaust air from the pumping chainb'er 14. p

This will result in a suctionthrough pipe 7 sufficient to lift the gasol'ene from the fuel tank 4 into the valve chamber 10. The gasolene will flow from the valve chamber into the ,pumpin chamber and will accumulate therein unti its weight releases the catches 25, whereupon the tank will drop until the apertures 20 are in communication with the lowerend of said chamber.

of recesses 26 and holdthe pumping chamber in its lower position until the accumulated At the same' time the catches 25 will engage the lower set 20 into the tank 5. When the weight of gasolene has been sufiiciently reduced a spring 27 will force the pumping chamber upwardly until the catches 25 engage the upper set of.

notches and the valve 21 has seated against valve seat 18, thereby closing the outlet apertures 20. In this upward movement of the pumping chamber the sleeve 22 engages the lower end of the extension 29 of valve 28 and lifts said valve from its seat thereby restoring communication between pipes 7 and 8 and the interior of the pumping chamber.

When the pumping chamber isin its lower position air will pass from the feed tank into the pumping chamber through the apertures 20. The feed tank 5 is vented at" its upper end in a suitable manner.

Should gasolene accumulate in ihe feed -tank 5 to such an extent as to prevent the a means for limiting the amount of gasolene 1 which may be accumulated in the feed tapk.

If the apertures 20 are sealed by gasol'ene in the feed tank air cannot pass to the in terior of the pumpin chamber and (201150 quently gasolene therein cannot flow through said apertures to tank 5. It is also clear that asolenc can flow into tank 5 from the pump.- ing chamber only when the apertures 20 are unsealed, so that the immersion of the lower part of the pumping-chamber in the gasolene accumulated in the tank will not neutralize. the weight of the gasolene in the pumpingchamber sufliciently to allow the pumpingchamber to prematurely ascend.

The apertures 20 are so spaced from the valve seat 18 that the valve 28 will be closed before the said apertures are opened. It manifest that these valves should be properly timed in order to revent air passing up into the tank 14 whi e the exhaust port 31 is open. By locating the apertures QO a con- 7 siderable distance below the valve seat 18 the catches 25 will be wholly released from their coacting depressions 26 before the said apertures are opened. It is desirable to hold the entire weight of the gasolene in the tank 14L for the purpose of releasing the catches and moving the tank to its lower position. Forthat reason it is desirable that the apertures 20 be heldclosed until the catches 25 are wholly free from the notches 26.

.What I claim is:

' 1. A fuelfeeding apparatus comprising a fuel tank, a carbureter, a gasolene engine,

gasolene has passed through the apertures a feeding tank above the level of the carbureter, a pumping chamber formed with a. flexible diaphragm in one of its walls, means connecting the interior of said pumping chamber with the intake side of the engine, means connecting the said chamber with the fuel tank, means conneotingthe lower end of the feed tank with the carbureter, and means whereby the weight of a predetermined amount of gasolenc in the pumping chamber will flex said diaphragm and close communication with the fuel tank and the engine, and open communication. between the pumping chamber and the feedtank.

2. The combination of a feed tank, a pumping chamber, a diaphragm in one wall of said pumping chamber, suction operated means for accumulating fluid in said chamber, valve mechanism controllin communication between the feed tank anf the pumping chamber and the suction operated means, means whereby the weight of a predetermined accumulation of fluid in the pumping chamber will close communication with the suction operated means and open communication between the pumping chamber and the feed tank, and means operating after the discharge of fluid from the pumping cham-.

ber to restore communication between the pumping chamber and the suction operated means.

. 3. The combination of a feed tank, a vertically movable pumping chamber therein, a flexible diaphragm vide with a fluid inlet port and an,exhaust port leading from its top, iylrieldable means for holding the pumpin c' amber in communication with the flui inlet and the exhaust outlet whereby the weight of the accumulated fluid in the pumping chamber will flex the diaphragm and depress said chamber and close communication between said chamber and the exhaust outlet and open communication betweenthe said chamber and the feed tank, said yieldable means embodying devices for raising the pumping chamber after the discharge of fluid to thereby restore communication between said chamber and the exhaust outlet.

4. In an apparatus of the class set forth, the combination of a feed tank having a closure head provided with an inlet port and an exhaust port and a passage leading from said ports to the interior of the feed tank, a valve controlling said passage and said ports,

forming the top of said pum in chamber, said chamber'being pro a vertically-movable pumping chamber located within the feed tank and ada ted to open said valve when the pumping chamber is at its highest point, the upper end of said pumping chamber being closed b a flexible diaphragm connecting the chamber to said head, means whereby the weight of the accumulated fluid in the pumping chamber will depresssaid chamber and permit said valve to close and also to open communication between the pumping chamber and the feed tank, and means for raising the pumping chamber to open said valve after the discharge of fluid from the pumping chamber into the feed tank.

5. the combination of a feed tank, a vertically movable pum ing chamber therein, a flexible diaphragm filming the top. of said pumping chamber, said chamber .being provided near its top with a fluid inlet port and an exhaust port, a valve controlling said ,ports, yieldable means for holding the pumpmg chamber in its upper position, means whereby the chamber in itsupper position will hold the said valve open, means opening communication between the pumping chamber and the feed tank when the accumulated fluid' in the pumping chamber overcomes the yieldable holdmg means and depresses said chamber, and means for closing the said valve when the pumping chamber is depressed. I I

6. The'combination of a feed tank, a vertically movable pumping chamber therein a flexible diaphragm orming the top of said pum ing chamber, said chamber being provide near its top with a fluid inlet port and an exhaust port, a self-seating valve controlling said ports, yieldable means for holding the pumping chamber in its upper position, means whereby the chamber in its upper position will hold the said valve open, means opening communication between the pumping chamber and the feed tank when the accumulated fluid in the pumping chamber overcomes the yicldable holding means and depresses said chamber, and means for raising the pumping chamber after the discharge of fluid to open the self-seating valve and thereby restore communication between the pumping chamber and the inlet and exhaust ports.

In testimony whereof I hereunto afiix my signature.

HAROLD C. SUGKERT.

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