US1476012A - Fuel-supply valve - Google Patents

Description

Patented Dec. d, 1923.

UNTE TAT RASMUS 'M- HVID, 0Fy CHICAGO, ILLINOIS.

FUEL-SUPPLY VALVE.

Application filed September 1, 1921. Serial No. 497,730.

To all whom it may concern.'

Be it known that I, RAsMUs M. HvID, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in a Fuel-Supply Valve, of which the following is a speelication.

My invention relates to-internal combustion engines of the type in which ignition is effected by the heat of compression and in which liquid fuel 'is inhaled during the suction stroke of the cycle.

One of the objects of my invention 4is to provide means in connection with the fuel supply for abstracting heat from the valve body at a point adjacent to the ignition cup.

It has been found in practice that in the use of certain grades of liquid fuel the heat absorbed by the cup and valve body serves to volatilize suiiicient of the fuel to form a gas pocket of such volume as to displace the liquid fuel and finally cause the stoppage of the engine. To obviate this it has been found to be desirable .to effect a circulation of liquid fuel at a point adjacent to the valve body, thereby withdrawing suilicient heat to maintain the parts in proper operating condition.

In the construction here proposed I provide a chamber which surrounds the valve body at a point intermediate its ends, the chamber being in communication with the needle valve passage and pipe connections being provided for the supply and discharge of liquid fuel to the chamber. In addition have provided means for simple and effective control of the needle valve, the details of which will be hereinafter described.v

The invention will be more readily understood with reference to the'accompanyin drawings, in which,

iig. 1 is a lon itudinal vertical sectional View through a uel supplying device constructed in accordance with my invention, and

Fig. 2 is a plan view thereof.

In the drawings it will be seen that a cylinder 10, is provided with a head 11, hav- `ing a vertical cylindrical recess 12, provided at its lower end with a tapering seat 13. Mounted within the recess 12 is a valve body 14, havin a fianged head 15, engaged by the nuts 16, or the purpose of securely holding the body in place. An ignition cup 17 is secured to the lower end of the valve body,

yin measured quantities to the the cup bein provided with a tapering surface adapte to engage with the seat 13, in order to make a fluid-tight joint. The valve bodyv is concentrically apertured to provide for a valve 18, having a stem 19 and operated through the medium of a plunger 20, by a bell crank 21. The valve body is also diagonallyapertured to provide for a needle valve 22, the pointed lower end of which enters the contracted passage 23, through which the liquid fuel is supplied ignition cup 17. The upper end of the needle valve has a spherical portion 24C, which engages with a threaded stem 25, terminating in a nurled nut 26. A spring 27 backs up the spherical end ofthe needle valve within the stem. The stem is mounted within a threaded opening in a similarly threaded sleeve28, to which is'secured .an arm 29, operating on a sector 30, as best shown in Fig. 2. The threaded portion of the sleeve 28 is mounted within a threaded aperture in a rigid portion 31 of the valve body. The arrangement is such that as the. arm 29 is swung through its limit of movement, the needle valve is raised and lowered to open and close the Aneedle valve opening. The line adjustment of the needle valve is secured by means of the threaded stem 25.

The valve body 14 is cut away at a point intermediate its vends thereby providing a chamber 32 which is in communication with the diagonal passage within which the needle valve is mounted. Threaded openings 33, 34, provide for pipe' attachments, the former 'serving tok-admit liquid fuel and the latter to discharge the excess. In practice the fuel plimp (not shown) will deliver liquid fuel through the lower opening and cause its discharge through the upper opening whereby a constant circulation is maintained through the chamber 32. This serves to abstract surplus heat and maintain the valve body in a proper condition as to temperature. Another advantage in the construction described is in that the valve body and its connected parts 'may be inserted and removed without interferin with any pipe connections. This simpli es the matter of operation very materially and reduces the time required for removal and replacing of the valve. Furthermore, the cooling medlum is applied to the valvebody at a point close to that at whichthe greatest heat is found; that is, within the ignition cup. The exact operating conditions ulating the speed cf e cooling medium in temperature for best may be attained by re the pump to circulate t proper quantities.

It will be noted that suflicient space is provided around the measuring pin for the escape of any trapped air or gas which may accumulate in the chamber. It will be noted also that the spring separating the measuring pin from the adjusting stem serves the purpose of preventing the jamming or distorting of the valve seat, due to the action ofthe arm in opening and closing the valve. rl`his is a useful provision and avoids considerable difficulty particularly in multicylinder engines.

Obviously the construction is capable of modiications and l do not wish to be limited except as indicated in the appended claims.

l claim:

1. In an internal combustion chamber of the type in which liquid fuel is supplied for combustion purposes, the combination of a cylinder, a valve adapted to be seated in said cylinder and provided with 'a`reduced intermediate portion, said cylinder being provided with inlet and outlet ports comf lmunicating with the space formed by said reduced portidn whereby liquid fuel may be caused to circulate around said valve body.

2. In an engine of the type in which liquid fuel employed for combustion, the combination of a cylinder having a recess, a valve body adapted to occupy said recess, said valve body being cut away to provide a chamber between the body and the adjacent wall of thecylinder, and inlet and outlet passages for liquid fuel communicating with said chamber whereby liquid fuel is caused -to circulate through said chamber.

3. In a fuel-supplying and circulating device, the combination with a cylinder having a recess, of a valve body adapted to occupy said recess and having a needle valve passage, said valve body bein"r reduced to provide a chamber in communication with said passage, thev cylinder wall havihg inlet andl outlet ports whereby liquid fuel is caused to be supplied to said chamber and to circulate therethrough for the purpose of abstracting heat from said valve body.

4. A fuel-supplying and circulating dc- -vice, comprising 1n combination a cylinder of August, 1921.

RASMUS M. HVD.

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