US1216843A - Carbureter. - Google Patents

Description

E. C. RiGHAHU.

CARBURETER.

APPLICATION FILED MAR. 19. 1913.

Patented F910. 20, 1917.

3 SHEETS-SHEET l.

E. C. RICHARD.

CARBURETER.

APPLICATION FILED MAR. 19, 1913.

L lfifig. Patented Feb.20,1917.

3 SHEETS-SHEET 2.

+ l l ium wmEssEs mvEm'm? E. C. RiCHARD.

CARBURETER.

APPLICATION mm MAR 19, 1913.

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Specification of Letters Patent.

Patented Feb. 19137.

Application filed March l9, 1913. Serial No. 755,310.

T0 at? "whom it may concern. x

Be'it known that I, Euonnn G, RICHARD, a citizen of'the United States, residing at Flint, county of Gencsee state of Michigen, have invented a certain new and useful Improvement in Carbure'ters. and dcclare the following to be a full, clear,.and exact description of the same, such as will. enable others skilled in the art to which it pertains to make anduse the same, reference being bad to the accompanying drawings,

embodying my invention and so much of an internal combustion engine as is necessary to illustrate itsconnection therewith.

Fig. 2, is a" sectional view of a carburetor embodying my invention with a diagram showing an electric" circuit and connection] Fig. 3, is a section of the same taken at ri ht angles to the section of Fig 2.

ig. 4, is a plan View of the carbureter partly broken away on the line D-D Fig. 2.

Fig. 5, is a section on the line E-E Fig. 3.

a, a indicatesthe cylinders of an internal combustion motor. 5 is thcclvhaust manifold and c is an intake manifold. (Z (Z in dicates the carburetor casing as a whale. 6 is the exit'passage which communicates directly with the intako'ot' theengine. f is g, isthe reservoir for liquid hydrocarbon. 7 indicates an opening for air at the bottom'and center of the carbureter communicating with the mixing chamber 2' is a valve adapted to seat downward upon a valve seat surrounding the upper end of the passage h. j, is the stem of the valve 6 adapted to reciprocate 1n bearings, as shown. k is an upward exterision of the valve stem y' having a coma-at shape in cfoss section and adapted to an opening as hereinafter described. m is oi rod en'tending upward and coaxial from chef part is forming an extension of the valvestem 10, is a cavity in which the part on is adapted to reciprocate and to fit loosely to permit the passage of oil between said part and the wall of the cavity.

n. is an auxiliary chamber having an open iug 11 communicating with the mixing chamber f. The part A: extending upward from the valve 2' is adapted to vary the effective opening through 11 by its position relative to said opening. 0 (Fig. 3) is an aperture communicating with the chamber n. and with the outside air. p, is a needlecontrolled opening through which the hydrocarbon may be fed tothe aperture 10 and from there passed down" by gravity into the chamber a. 12, is a conduit through which the hydrocarbon passes from the reservoir g to the opening 77. y

I], is a throttle valve adapted to vary the area of the passage at e. 7' is an aperture through the wall of the passage 6 opening below'thc valve I] when slightly open. j

The edge of the valve is of less thickness than the diameter of the opening 1 and gradually passes said opening close to the Wall of the main passage from the side of said opening toward the entrance to the main passage. at which position the auxiliary passage is freely open to the suction of the engine. to the side of said opening toward the engine. at which position saidvalve interposes itself-between the engine and the opening to the auxiliary passage.

2, is a casing secun d at the side of the carburetor. is a pipev communicating with the exhaust manifold (Fig. 1) and passing through the casing 2. 7 7 is a jacket surrounding the mixing chamber f of the can bureter. The pipe o-communicates with the jacket as shown in Fig. 2.

t. is an air pipe communicating at one end with the aperture 7 and opening at the other end at the inner end of the casing 3. The pipe extends in coils e 2 in the casing 2; which coils are heated 'to raise the temper ature of the air passing through said pipe.

3. is a conduit communicating at its lower end with the reservoir 7 beneath the level of the liquid therein and at its upper end opening through an aperture 8 into the opening '1'. F aid conduit has fairly thin walls which are, for a portion of the length of said conduit, entirely within the jacket to so as to "be surrounded by the hot fluid in said jacket.

1 is a screw plug cngaging'threads m an 4:. are conductors connected to the binding into the aperture r.

posts 5, 5. 7, is a source of electricity which may be a storage battery interposed in the conductors l, 4; ,8, is a switch by which the circuit through the conductors 4, 4 and the coil 6 may be made or broken.

The operation of the above described device is as follows:

The passage 6 is connected to the intake pipe of the engine in the usual way.

The operation of the engine draws the air from the pipe 6 and mixing chamber f causing the valve 2' to rise from its seat and admit air through the passage The rising of the valve 2' raises the part and increases the effective area of the opening'll. Air is therefore drawn through the passage 0 down through the chamber n and into the mixing chamber f causing the fuel to flow through the aperture 10 past the rod m and into the chamber 72 where it mixes with the air passing through said chamber and into the mixing chamber f, in both of which chambers it is vaporized.

The draft in the chamber a will always be less than that in the chamber f and the degree of the draft in the chamber n and consequently the rate of feeding of the fuel through the aperture 7) may be determined by the shape of the part is.

When the engine is in operation a portion of the hot exhaust gases pass through the pipe as, casing 2, and jacket 40 thus warming the walls of the mixing chamber f and the walls'of the conduits 3 and 12. The liquid fuel passing through the conduits 3 and 12 is therefore heated so that its viscosity will be less and therefore it will flow more freely and heat will be supplied to it more readily for causing its vaporization;

In starting the engine the switch 8 is first closed so that the coil 6 will be heated by the electricity passing through it and will heat the. coil 2 of the pipe i and the portion of the pipe 2 within the casing 2. The needle valve 14 is drawn outward permitting a free flow of liquid fuel. through the conduit 3 and The draft from the engine will now draw heated air through the pipe 3 causing the fuel in the passage rto vaporize and will furnish a charge for starting the engine.

When the engine is in operation it will ave the normal action first above described.

6 is a resistance In starting, or while running at a low speed, the throttle valve nearly closes the passage 6 while leaving the passage r open. The suction of the engine therefore acts to draw air with great velocity through the pipe 3 and cause a considerable flow of fuel thus producing the required rich mixture.

What I claim is:

1. In a carbureter, a main air passage, means for supplying liquid fuel thereto, a throttle valve in said main passage, an auxiliary air passage communicating with the atmosphere and opening through a Wall of the main passage adjacent to said valve, said valve being so located and constructed that it shall leave said opening slightly exposed to the suction of the engine when said valve is approximately closed but shall interpose itself between the engine and said opening when said valve is open to a greater extent, a delivery nozzle for liquid fuel opening into said auxiliary air passage whereby a rich mixture for idling speeds and easy starting is supplied. Y

2. In a carburetor, a main air passage, a second air passage opening into said main passage, a delivery nozzle for liquid fuel opening into said second passage, a throttle valve in the main passage, a third air passage communicating to the atmosphere. and

opening through a wall of the main passage, adjacent to said valve, said valve being so located and constructed that it shall have said opening slightly exposed to the suction of the engine when said valve isapproximately closed, but shall interpose itself between the engine and said opening when said valve is opened to a greater extent so that the three air passages shall be subject to approximately the same suction, a delivery nozzle for liquid fuel opening into said third air passage for the purpose of supplying a rich mixture for idling speeds and easy starting.

3. In a carbureter having a main air passage therethrough, an automatic lift valve for controlling the entrance to said passage, a' second air passage opening into the first named passage in line with and in a direction opposite to the entrance to the first named passage, a delivery nozzle for liquid ed to control the entrance to the main air J assa e an extension havin a var in cross section extending from said valve into the opening from said second air passageand a delivery nozzle for liquid fuel opening into said second passage, substantially as and for the purpose described.

5. In a .carbureter, a main air passage, extending therethrough, a second air passage extendlng into said main passage and open ing toward the entrance to said main passage, an automatic lift valve adapted to be operated by the suction of the engine adapted to control the entrance to the main passage, an extension having a varying cross section extending from said valve lnto the opening from said second assage and a de-- livery nozzle for liquid e1 opening into said second passage, said extension being provided with a prolongation extending into a cavity in the wall of said second passage, said nozzle opening into said cavity.

In testimony whereof, I sign this specifi' cation in the presence of two witnesses;

EUGENE O. RICHARD. Witnesses:

Em E. EASTON,

J OHN E. STORER.

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