US1242288A - Vacuum-feed system. - Google Patents

Description

F. WEINBERG.

VACUUM EEED SYSTEM.

APPLICATION FILED Aus.4. 1915.

I ,q rromm Patented Oct. 9,1917.'

FREDERICK WEINBERG. 0F DETROIT, MICHIGAN.

VACUUM-FEED SYSTEM.

Specification of Letters Patent.

Patented Oct. 9, 1917.

Application flied August 4, 1915. Serial No. 48,507.

:1 '0 all ii /tom. it may concern:

lie itv known that I, Fnuomucx Wnmnnao, a citizen of the United States, residin at Detroit, county of W uyne, State of MlCl'llgun, have invented a certain new and useful Improvement in \"acuum-l eed Systems, and declare the following to be a full, clear, and exact description of the same, such as Wlll enable others skilled in the art to which it )crtaius to make and use the same, reference lieing had to the accompanying drawings. which form a part of this specification.

My invention relates to vacuum feed sys tems for internal combustion engines and consist in the improvements hereinaftei described and pointed out in the claims.

The accompanying drawing is a vertical elevation. most ly in section, of an apparatus embodying my invention.

a is an auxiliary tank for receiving the liquid fuel. This tank is divided into two chambers, or conn'uirti'nents, the intermediate reservoir a and vacuum chamber 7). c is a supply tank from which through a. conduit d liquid fuel is supplied directly to the chamber 12. The supplv'conduit or pipe d extends through the cover of the tank a and terminates in the compartment 6 at a point; e some distance below the top of said compartment for a reason hereinafter pointed out.

f is a vacuum pipe communicating with the compartment 6 of the tank a at one end and at the other end con'imunicating with a part of the engine. or attachment thereto, so that the motion of the engine shall draw a vacuum through the pipe 7. In the present instance l have shown the vacuum producing pipe j as communicating with a passage in a. pet cocki which passage extends into the cylinder 7, but it may communicate With the intake pipe to the engine, as described in my pending itpplications No. 876,604 and No. 17,141, filed Dec. 11th, 1914, and Mar. 26th, 1915. t

It is a carbureter undm is a pipe extending from the lower end of the outer compartnnento of the tank a. The liquid is supplied tov the carburetor h through the passage m.

o is a float in the compartment 6 of tie tank a. 71 is a passage extending from t e compartment 5 to the outer air and forming a communication between the exhaust pipe f and said compartment. p is an outwardly f opening valve adapted to close the outer and ot' the passage p and in so doing to close the communication between the .assage f and the outer air. q is a rod exten ing from the float 0 and joined to the valve p to raise the same from its seat when the liquid in the compartment 5 has raised a certain height.

it is a passage leading from the lower end ofthe compartment 6 to the compartment a. n is a check valve normallyopen and ada 'itcd to automatically close to prevent the flow of liquid from the compartment (t to tho t-om t artment b through the passage n Th1- movtnnent oi lllin valve is intentionally restricted. li 1nu =l not be too far from the sent. othm'wise the oou'ipnieiiwsmall suction would not close it and the device would have to be primed. On the other hand it should be norma ly open so as to allow the heated fuel to use from the lone; into the upper vessci. The apparatus is necessarily located near the engine and Will become heated. The heat expands the fuel and provision must be made to accommodate this expansion, especially immediately afti the engine is shut down. The lower vessel is completely filled While the upper vessel is only partly filled and if the valve.is open the fuel may rise into the upper vessel and no additional pressure will be exerted against. the carhureter needle valve and cause oven flow of fuel from: the nozzle.

The valve n being normally away from its seat will not become attached thereto by adhesion and therefore the trouble that has heretofore been experienced in such devices of the valve sticking to it: seat when not in use will be obviated.

j is a small passageway extending through the pet cock 2. k is the plug of the cock 5 adapted to open and close the passage j. f is a check valve having a very sli ht movement and adapted to open towar the passage j and to close the passn. to the pipe f to prevent a flow into sai passage from said passage j. The passage f communicates with the passage insuch away that when a jet or current of gas is forced through the passage j it shall create a vacuum therein. When the plug is is turned to close the pas sage j the vacuum produced in the c linder g will draw a vacuum in the pipe This arrangement is provided to create a vacuum under all existing conditions in pipe It is a well known fact that by increasing the opening of the carburetor throttle,

. compartment In the present the vacuum in the cylinder decreases such an extent that it can not raise the fluid at a time when it is needed most. For this pur ,posc, extra pumps have been heretofore device such vacuum is crca by the action of the ]et passing through the passage 7' thus a vacuum is created also by the ejector action in the passage The pipe f is always in communication with the compartment b and when a vacuum is drawn in the pipe f, a vacuum will also be drawn in the compartment b and the resstire of air on the surface of the liquid in the supply tank 0 will force such liquid up through the conduit ll into the compartment 6 until the level of the liquid in said has risen to such an extent as to force the stem (1 against the valve p and force said valve from its seat, which opens the passage 1; to the outer air and destroys the vacuum in the compartment b a 'd passage f. When the level of the liguid in the compartment 71 has fallen su, ciently the float 0 will fall andthe valve p will again close the end of the passage 7) an the vacuum will again be created in the compartment b, as above described. The opening from the tank to the outer air must be! large enough relative to that through which the vacuum is drawn so that the vacuum will be freely relieved.

l/Vhile the supply tank for convenience is shown directly below the tank a, in an automobile the tank a is located at a considerable distance horizontally {from the tank a and in the use of an autpmobile the tank 0 may be raised above the tank a, in which case the liquid might flov by gravity into the compartment 1). To revent the fluid from flowing out, a valve is provided around the stem q. Said valve being adapted to seat against'the valve-seat q" and close the lower end of the passage so that the liquid will enter the compartment 7), and the compartment a as we 1, and rise into vent 1*, which leads to a point higher than the highest expected level of fluid in the stem, When, the tank a is again lowered below the tank a, there will be a tendency of the liquid in the pipe 0! to run back into the tank a and sufiicient of the surplus that has been supplied "to the com artment b will thus runback into the tan 0 so that the valve y will be withdrawn from the valve seat q and the apparatus will be again in working conditio What I claim is:-

1. In a vacuum feed system, the combination of vacuum chamber, means for supplying liquid fuel to said chamber because of the vacuum therein, sai chamber having an air space and ga liquid space, a single air essage leading from the air space of said chamber to the outer air, a vacuum producing passage communicating with said air nation of a vacuum chamber, means 'the inner end of sai (hate the ends of passage intermediate of the ends of the latter and a valve ada )ted to close and open the inner end of sai air passage.

2. In a vacuumfeed system, the compior supplying liquid fuel to said chamber because of the vacuum therein, said chamber having an air space and a liquid space, a single air passage leading from the air space of said chamber, a vacuum producing passage communicating with said air passage intermediate of the ends of the latter, a1

valve adapted to close the inner end of said air passage, and a valve adapted to close the outer end of said air passage. a

3. In a vacuum feed system, the combination of a vacuum chamber, means for supplying liquid fuel to said chamber because of the vacuum therein, said chamber having an air space and a liquid space, a single air passage leading from the air space of said chamber to the outer air, a vacuum producing passage communicating with said air passage intermediate of the ends of the latter and a valve ada ted to close and 0 en ai'r passage, a oat in said chamber, said float being adapted to actuate said valve.

4. In a vacuum feed system, the combination of a vacuum chamber, means for supplying liquid fuel to said chamber because of the vacuum therein, said chamber having an air space and a liquid space, a single air passage leading from the air space of said chamber, a vacuum producing passage comnnlnicating with said air passage intermediate of the ends of the latter, a valve adapted to close the inner end of said air passage, a valve adapted end of said air passage, chamber, said said valves.

5. In a vacuum feed system, the combination of a vacuum chamber, means for supplying liquid fuel to said chamber because of the vacuum therein, said chamber having an air space and a liquid space, an air passage extending through the wall of said chamber, a vacuum roducing passage communicating with sa d air passage intermediate the ends of the latter, a rod extending through said air passage and provided with a valve adapted to close the outer end of said air assage, and a valve adapted to close the inner end of said-air passage.

6. In a vacuum feed system, the combination of a vacuum chamber, means for supplying liquid fuel to said chamber because ofithe vacuum therein, said chamber having an air space and a liquid space, an air pas-- sage extending through the wall of said chamber, a vacuum producing passage communicating \vithsaid air passage intermethe latter, a rod extending and a float in said float being adapted to actuate to close the outer through said air passage and provided with assage located below the level of said 0 iniid 1 ,aaassa Y a valve adapted to close the outer end of said air passe a valve adapted to close the inner end o said air 'assage, and a float in said chamber, said being operatively connected'with aaidtlcat. r

7. Ina vacuumfeed stem, the combination of it vacuum chain r, means for sup- "plying liquid momma chamber because of the vacuum therein, a separitte vacuum raden ccmmunicating directly With'slti c amber, an

vacuum producing munieating directly with sai chamber, and a non-return valve said vacuum producing passage c osingio ward said vacuum ohembernnd opening to ward thecombustion Tchamben- 8. In a vacmulrfeed'sgestem, the combinationofif, I p 1', means for sup- ;said chamber because of the s eam therein; a vacuum producing passagegcoinmunicnting with" said chamber, an intefiial combustion engine cylinder having a combustiofchamber, a passage other ggeuum chain than the intake and exhaust passages lead in from the combustion chamber of said cy under to the outer air, said vacuumproducing passage communicating with the passage fromsaid cylinder, -and a' nonreturn valve located in said vacuum pro ducing passage closing toward saidvacuum chamber and opening toward the combustion chamber.

9. In avaeuum feed system, the combination of. vacuum chambenmeans for supplying liquid fuel to said'chamber because of the vacuum therein, a vacuum producing passage communicating with said chamber, an internal combustion engine cylinder haw ing a combustion chamber, a passage other than the intake and exhaust passages leadin from the combustion chamber of said c inder to the outer air, said vacuum pro using passe g communicating with said said cylinder, a cock in the ast named time communicatlon 0 said vacuum producing passage with 'the same, and anon-return valve located in said vacuum producing passage closi toward said vacuum chamher and opemng toward the combustion chamber. t 10. In a vacuum Iced system, the combination of; a vacuum chamber, a main fuel supply tank, a conduit connecting said tank and chamber, said tank being; normally amber but liable to be raised above said chamber, 0,

also leading from said chamber, a float iii an mslunnb'esforming an operat ve part of said when thmlevel of the liquid amber is within certain limits and combustion engine cylinder. having a comustion chafn j ber, sai "cumin:

ugtiiiit sited in outside of the point of liquid level raises above sai conduit opening into said chamber at a level within said'operating limits for the purpose described.

11. In a vacuum feed system, the combination of a main fuel supply tank, a vacuum chamber, an internal combustion en ine having a cylinder and a piston adapte to reciprocate therein, said cylinder being con nected by a so arate conduit, other than the intake and ex aust conduit to said engine, with said vacuum chamber so that the up and down movement of the piston shall create a vacuum in said vacuum chamber for the purpose of raising the fuel from said main tank. v

12. In a vacuum feed system, the combination of a main fuel supply tank, a vaouum chamber, an internal combustion on he having a cylinder and a piston adapte to reciprocate therein, said cylinder being provided with a passage opening upon the suction and compression side of said piston for one or more cycles, and a vacuum pro ducing passage connected with the first named passage so that the jet of air passing therethrough shall produce a vacuum in the vacuum passage.

.13. In a vacuum feed system, the combination of a vacuum chamber, a main fuel supplytank, a conduit connecting said tank and chamber, said tankbeing normally located below the level of said chamber but conduit opening into said chamber at n level within said operating limits, :1 reservoir adapted to be supplied by gravity from said vacuum chamber, and connected with a vent pipe leading'to a point above the highest expected point of the level'of the liquid in the system.

. 14. In a vacuum feed s stem, a vacuum chamber, means for supp ying liquid fuel thereto, a reservoir adapted to be supplied with fuel from said chamber, a conduit extending from said chamber to said reservoir, t being bounded by a surface formin Y a valve seat, and a valvepivoted to'sailf surface above said opening "so as to normally hang away from said surface, said surface slanting awa from said'valve, and away from the vertical, downwardly.

In testimony whereo I sign this specification.

- FREDERICK WEINBERG.

e. delivery opening of said conduit

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