US1137307A - Carbureter. - Google Patents

Description

H. N. EDENS.

CARBURETER.

APPucATmN r|LEn1uNE\.1914.

Patented Apr. 27, 1915.

d @n o @we f y@ IENRY N. EDENs, or NEW HOLSTEIN, wrscoNsIN.

CARBURETER.

Specification of Letterslatent.

PatentedApr. 27, 1915.

" Application med June 1, 1914. seria1No.s42,o2s.

To all wlwm it may concern: L:

Be 1t known that I, HENRY N. EDENS, a.

citizen of theUnited States, and resident of New Holstein, in thevcounty of Calumet and State of Wisconsin,y have invented certain new land useful Improvements in Carbureters; and I do hereby declare that the followingis a full, clear, and exact description thereof. 4 Y

vMy invention has for its object to provide a simple, economical and effective carbureter `capable `of producing as efficientL atomizing and fuel feeding resultsin a startingoperationas in ordinarysrunning. n y

With the above object in View the invention consists incertain peculiarities of construction.- andv combination of parts as set forth hereinafter with reference to the accompanying drawings and subsequently claimed. l Y

So far as I am aware,runder the'ordinary carbureter constructions now in use, in order to obtain'ideal conditionsV for starting an engine, it would lbe'necessary to utilize a small carbureter :iid la separate large carbureter for running.'- To employ two carbureters for the purpose of efficiency is,fhow ever, impractical. Y

My invention contemplates, therefore, a construction-of carbureter whereby the most efficient results can-'be obtained both in a starting operation and ,in running, which results'l areprimarily attained through a4 simplefadjustment. l 1 y Y In the carburization of a low grade of fuel the primaryxrequisite is to cause the volume of airftogfpass over the fuel jet at a high velocity inl -order that said fuel may be thoroughly atomized. In the Ordin-ary type of standard carburetena restricted area lof constantdiametersaround the fuel jet is utili'zedf.r Consequently the'amount of air passthrough the restricted area is much less invcubic feet per minute ina starting operation-*than in. ordinary running.` Hence, in starting, an insufficient amount of fuel necessary for a perfect combustible charge 1s picked up, In order to counteract this tendency in the ordinary type of carbureter, a valve, either automatically or manually controlled, is placed in the air supply intake mouth, thereby increasing the vacuum around the fuel nozzle, resulting in an increasing amount of fuel supply. However,

under these conditions the velocity of the airis decreased lto such an extent that the fuel -is only partially atomized and, as a consequence, has a tendency to dropl to the bottom of the carbureter and be wasted or th1s oversupply of liquid fuel will be drawn into the en ine cylinder and cause flooding.

It is therefore the primary object of my present invention to overcome the objectionable features demonstrated in practice, as above stated. It is also within the scope of my present lnvention to utilize either a suction feed for the fuel or to utilize a reservoir in which the level of the fuel is maintained by float mechanlsm or pump. It is also obvious that it can be adapted for use in connection with a constant levelv fuel supply. The carbureter is .also capable of supplying alcohol as a fuel, w1thout any additional changes of construction.

In the drawings Figure l represents a central sectional elevation through a carbureter embodying'the features of my invention, the

section being indicated by line 1-1 of Fig. 2; Fig. 2, an inverted sectional view of the same with parts broken away to illustrate certain valve ports, the section being indicated by line-22 of Fig. 1, andfFig. 3, a longitudinal sectional view of the carbureter, the same being taken vthrough a plane as indicated by line 3-3 of Fig. 1. f

Referring `by characters to the drawings, 1 represents a two-part casing, which casing is provided with an air intake channel 2, and a fuel discharge channel 2. The casing is preferably' cylindrical in forml and is divided into an air intake chamber 3 and a fuely inixinr chamber 3 byl a partition 4, which partition is formed with a centrally disposed khub 5 and radial ports 4, the said partition being in theA form of a web between the chambers. The hub 5 of the partition is connected to the walls of the casing within the :mixing chamber by an arm 5 having a fuelhorifice 6 therein. This fuel orifice is controlled by a pin valve 7, which pin-valve passes througha suitable pipe fitting 8 that is provided with a vbranch-pipe-9 for sup-l plying the fuel oil. Mounted within-theI hub 5 is a Venturi tube l0 having an orifice 6 that registers with and constitutes a par-t ef the fuel supply orifice 6, the said' orifice being in communication with the restricted belt of the tube. The flared intake mouth of the Venturi tube communicates with the air intake chamber 3 and its corresponding flared discharge mouth communicates with the mixing chamber 3.

Mounted within the air intake chamber 3 is a barrel valve 11 having a pivot-stud 11 that projects through a central aperture of the casin wall, which wall constitutes the bottom o the air intake chamber. The stud has secured thereto an actuating lever 12, which lever is provided with a segmental slot 12 that is arranged to receive a guidepin 13, the `same being extended from the casing. This guide-pin carries a frictional locking mechanism in the form of a coiled spring, 14, the same being interposed between washers that are carried by the pin 13, one of which washers is adapted to exert pressure upon the lever. The barrel valve is adjusted about its axis in alinement with the Venturi tube and, when so adjusted, the frictional locking mechanism is sufficient to hold the same in position.

The upper wall 11" of the barrel valve member, shown partly broken away in Fi 2, is provided with a central aperture whic is fitted about the juxtaposed mouth of the Venturi tube and said wall is also provided with radial ports 15, which ports are adapted to register with the partition ports 4 whereby the latter are controlled, it being understood that the upper face of the valve partition 11 is in sliding engagement with the lower face of the chamber partition 4. The side-wall of the barrel valve is also provided with a port 16, which port is adapted to control the air intake channel 2. -As shown in the drawings, the proportion of the barrel ports 15 and 16 with relation to the ports they control is such that when the chamber ports 4 of the partition are entirely closed, the port 16, which controls the intake channel 2, is slightly opened.

From the foregoing description it will be understood that when the engine is to be started, the barrel-valve 11 is rotated by means of the hand-lever 12 until the'ports 4 of the partition 4 are entirely closed and the port 16 of the valve only partially closes the intake channel 2, there being sufficient opening between said channel and the mixing chamber 3 to permit a slightamount of air in proportion to. the `full volume to enter said chamber. The parts being in this position upon' the suction stroke of the engine piston, a charge is drawn into the cylinder, whereby a sufficient high vacuum is obtained in the carbureter due to the partial closing of the valve port 16 and -the complete closure of the mixing chamber ports 4. Under these conditions all the air for producing the fuel mixture is passed through the Venturi tube and a suflicient high velocity is thus -maintamed over the fuel supply vent 6 to thoroughly vaporize said fuel. After the engine is started, the ports 4 and16 are opened. simultaneously to the position shown in Fig. 1, whereby the greater, partof the. air thenV asses through the mixing chamber ports 4 thus maintaining a practically constant velocity through the tube 10. Hence will be seen that, y the employment of a "Venturi tube and a single valve, mechanism controlling two lsets ofl ports, a simple and effective carb ureter is produced having the qualificatlons of maximum flexibility with reference toits various duties.

I claim:

1. A carbureter comprising a casing having an intake channel and a fuel delivery,

channel, a ported partition within the cas mg arranged to divide the same into an air chamber communicatin with the air intake channel, and a mixing c amber communicating with the discharge channel, a c entrall disposed Venturi tube carried by the partltion having its flared intake mouth extending into the air chamber and its flared discharge mouth extendin into the mixing chamber, a valve-control ed fuel supply orlfice in communication vwith the restricted belt of said tube, and a rotatory barrel valve i mounted in said air chamber providedwith mixing chamber, a valve-controlled fuel supply orifice in communication with the restricted belt of said tube, and a rotatory barrel valve mounted in said air chamber provided with a port adapted to co-act with the partition port, and a second ort for controlling the air intake channe the ports being so proportioned with relation to each other that when the intakeI channel is partly open, the partition controlling port is fully closed, whereby air is admitted to the mixing chamber through the tube only.

In testimony that I claim the foregoing I have hereunto set my hand at New Holstein in the county of Calumet and State of Wisconsin in the presence of two witnesses.

HENRY N. EDENs.

Witnesses ARTHUR C. PEIK, B. `F. Aars.

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