US1230147A - Means for supplying fuel mixture to gas-engines. - Google Patents

Description

H. J. GAlSMAN.

MEANS FOR SU-PPLYING FUEL MIXTURE T0 GAS ENGINES.

APPLICATION FILED MAR. 13. 1916.

Patented June 19, 191

' smucu'foz $1 (1H0: an

lid

can

HENRY J. GAISMAN, 0F WOODMEBE, NEW YORK.

MEAES FOR, SUPPLYING FUEL MIXTURE T0 GAS-ENGINES.

Specification of Letters Patent.

Patented June 119, 191?.

Application filed March 13, 1916. Serial No. 83,753.

To all whom it may concern."

Be it known that I, HENRY J. GAisMAN,

a citizen. of the United States, and resident of Woodmere, in the county of Queens and late of New lork, have invented certain new and useful Improvements in Means for bupplying Fuel Mixture to Gas-Engines, of which the following is a specification.

The object'of my invention is to provide means to automatically control the flow of liquid fuel into the carbureting or mixing chamber of a carburetor for internal combustion engines, in accordance with the temperature conditions of the manifold connecting the carburetor with the engine cylinder or cylinders, whereby a relatively rich mixture may be obtained for starting the engine, and the liquid fuel supply may be reduced automatically as the engine speeds up during operation.

In carrying out my invention 1 provide a fuel mixture manifold in thermal relation to exhaust gases flowing from the engine, a carbureter having its mixture outlet incommunication with said mixture manifold, and a thermally acting element, such as a thermostate, in thermal relation to the heated manifold and operatively connected with the fuelcontrol valve for the carbureter, whereby when the engine is cold said valve may be so set as to permit the production of a rich mixture in the carburetor, and as the manifold becomes heated said thermal element will cause the valve to more or less restrict the flow of heated fuel to the carburetor and reduce such richness of the mixture for the proper operation of the engine.

My invention comprises novel details of improvement and combinations of parts that will be more fully hereinafter set forth and then pointed out in the claims.

Reference is to be had to the accompanying drawings forming part hereof, wherein,

Figure 1 is a plan view lllustrating my improvements in connection with an internal combustion engine;

Fig. 2 is a side view of Fig. 1;

Fig. 3 is a section on the line 3, 3, 111 Fig. 1;

Fig. 4 is an enlarged section on the line 4, a, in Fig. 2;

Fig. 5 is a section on the line 5, 5, in Fig 2, and

Fig. 6 is a partly sectlonal detail view hereinafter referred to.

Fig. 7 is a detail View of the needle valve and thermostat.

Similar numerals of reference indicate corresponding parts in the several views.

The manifold indicated generally at 1 comprises a casing provided with a chamber or passage 2 having ports 3 in communication with exhaust ports 4: of an internal combustion engine 5, said casing also being shown provided with a chamber or passage 6 in thermal relation to chamber 2 to be heated by hot exhaust gases in the latter chamber. Chamber 6 is shown provided with tubular passages 3" passing through chamber 2 and adapted for open communication with inlet ports 8 of the engine, the arrangement being such that mixture flowing into chamber 6 from a carbureter, indicated at 9, will be heated in its passage to the engine cylinders. The manifold may be attached to the engine by studs or bolts 10, shown passing through cored passages 11 in the manifold. The carburetor 9 may be attached to the manifold to supply mixture to the chamber 6, as through the inlet opening 12 of said chamber with which the carbureter mixture-outlet communicates. The carburetor may be of any desired construction, and is shown provided with a needle valve 1 adapted to control the orifice or jet 15 which provides communication between the constant-level fuel chamber 16 of the carburetor and the carbureting or mixing chamber 17 of the carburetor. The needle valve 14 is connected to or carried by a thermal element 18, which is located adjacent to the manifold in such manner as to be heated by the latter to cause movement or adjustment of the needle valve with respect to orifice 15 of the carbureter. The thermal element or thermostat 18 may be secured to the manifold by means of screws or studs 19. The thermostat may comprise a plurality of strips 18", 18 of different metals so arranged that when the manifold is cold said thermal strips will tend to move valve 14: away from orifice 15 to permit the flow of fuel from said orifice for the production of a relatively rich mixture, and when the thermal strips are heated by reason of their thermal relation to the manifold, said strips will move the needle valve reversely to reduce the flow of fuel from orifice 15. I

i have shown the needle valve 14 tapered at its lower end 14* for coaction with fuel orifice 15. The upper end of said needle valve is shown guided in an arm 20 secured to the thermostat, and for the purpose of adjusting the needle valve 14: relatively to the fuel orifice 15 I have shown one of the thermostat strips provided with a screw 21 meshing in threads in said strip and coacting with the upper end of the needle valve. The needle valve 14: is shown provided with a shoulder '22 bearing against strip 20. Strip 20 may be in the form of a spring tending normally to hold the needle valve against screw 21. The needle valve may pass freely through an opening 9 in the carbureter, whereby the valve is guided with respect to fuel orifice 15.

By reason of the thermal relationof the manifold mixture chamber 6 to the manifold exhaust chamber 2, a mixture for the engine may be utilized forgeneral work that is leaner than if manifold 6 were not heated, becauselof the heating of the mixture in the manifold, but with such a mixture starting of the engine might be difficult when cold with the needle valve set for such mixture. By reason of the connection of the needle valve, however, with the thermal element or thermostat 18, that is in thermal relation to the manifold, the needle valve may be set to permit a relatively rich mixture to be produced when the engine is cold, and then when the manifold becomes heated the thermostat will likewise be heated and thereby will operate or expand to cause the needle valve to move toward orifice 15to reduce the flow of liquid fuel therefrom tofurnish a relatively lean or correct mixture, which, when heated in its passage through chamber 6 of the manifold, will be suihcient for the requirements of the engine. The needle valve may be adjusted with respect to orifice 15 for production of the desired character of mixture, while the engine, the manifold and the thermal element 18 are heated and then when said parts are cold and the thermal element 18 contracts, the needle valve will be withdrawn from'orifice 15 ready for starting of the engine.

My improvements are advantageous in that the movement of the needle valve for regulating the flow of liquid fuel to the carbureting or mixing chamber is automatically controlled according to the temperature of the manifold, and the operator is not required to reset the needle valve for the general running of the engine, because of the richness of the starting mixture, for as soon as the engine and manifold become hot, and the thermal element becomes correspondingly heated, the needle valve will gradually close toward orifice 15 to reduce the flow of liquid fuel from said orifice. By the means described an economy in fuel consumption may be effected because the heated mixture does not require so great a supply of liquid fuel as an unheated mixture, and yet the required supply of liquid fuel for the mixture is ready at hand for different engine conditions.

'My invention is not limited to the particular details of construction and relative arrangeme'nt of parts set forth herein, as the same may be varied, within the scope of the appended claims, without departing from the spirit of'my invention.

Having now described my invention, what I claim 1s:-

1. The combination of a manifold having a passage for mixture, means to heat said passage, a carbureter communicating with said passage, a valve to control the flow of fuel in the carbureter for the mixture, and a thermal element operatively connected with said valve and controlled by the temperature of the mixture due to its thermal relation to said heating means.

2. The combination of a manifold having a passage for exhaust gases, a passage for mixture in thermal relation thereto, a carbureter communicating with the second named passage, a valve to control the flow of fuel to the carbureting chamber and a thermal element connected to said valve and controlled by the resultant temperature due to the thermal relation of the mixture to the exhaust gases.

3. The combination of a manifold having a passage for mixture, means to heat said passage, a carbureter communicating with said passage, a valve to control the flow .of fuel in the carbureter for the mixture,

a thermal element operatively connected with said valve and controlled by the temperature ofthe mixture due to its thermal relation to said heating means, and means for adjusting the valve with respect to the thermal element.

4. The combination of a manifold having a passage for mixture, means to heat said passage, a carbureter communicating with said passage, a valve to control the flow of fuel in the carbureter for the mixture, a

said valve and controlled by the resultant temperature of the mixture due to its thermal relation to said heating means, means for adjusting the valve with respect to the thermal element, and a spring interposed between the thermal element and the valve 7 thermal element operatively connected with the mixture to the exhaust gases for causing movement of the valve to reduce the flow from the orifice when the thermostat is heated.

6. The combination of a manifold having a passage for exhaust gases and a passage for mixture in thermal relation thereto, a carbureter communicating with the second named passage and having a fuel orifice, a valve to control the flow from said orifice, a

thermostat operatively connected with said valve and controlled by the resultant temperature due to the thermal relation of the mixture to the exhaust gases for causing movement of the valve to reduce the flow from the orifice when the thermostat is heated, and means for adjusting the valve relatively to the thermostat and said orifice.

7. A passage for a fuel mixture, means to heat said passage, means to supply fuel mixture to said passage, means to control the supply of liquid fuel for said mixture, and thermally operating means in thermal relation to said. heating means and to said passage for fuel mixture and operatively associated with said fuel controlling means to control the latter by the temperature of the mixture due to its thermal relation to said heating means to vary the supply of liquid-fuel for the mixture.

Signed at New York city, in the county of New York, and State of New York, this 11th day of March, A.- D. 1916.

HENRY J. GAISMAN.

Witnesses:

T. F. BOURNE,

E. GRAEF.

Images