US928939A - Charge-forming device for gas-engines. - Google Patents

Description

J. A. & J, CHARTER. CHARGE FORMING DEVICE FOR GAS ENGINES.

APPLICATION FILED JULY 23. 1908.

Patented July 27, 1909.

2 SHEETS-BHEET 1.

J. & I. CHARTER. CHARGE FORMING DEVICE FOR GAS ENGINES.

APPLICATION FILED JULY 28, 1908.

v Patented July 27, 1909.

2 SHEETS-SHEET 2.

' UNITED sTAtrEs- PATENT OFFICE.

A. CHARTER, OF CHICAGO, AND JOHN CHARTER, OF XENIA, ILLINOIS, ASSIGNORS TO AUSTIN MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS. A CORPORATION OF ILLINOIS.

Specification of Letters Patent.

CHARGE-FORMING DEVICE FOR GAS-ENGINES.

Patented July 27, 1909.

Application filed July 28, 1908. Serial ITO. 446,779.

To all whom it may concern:

Be it-known that we, JAMES A. CHARTER and JOHN CHARTER, both citizens of the United States, and residing, respectively, at Chicago, in the county of Cook and State of Illinois, and Xenia, in the county of Clay and State of Illinois, have invented certain new and useful Improvements in Charge- Forming Devices for Gas-Engines, of which the following is a specification. v

This invention relates to the art of inter nal combustion engines, and pertains more especially to an improved mechanism for forming and overning thee losive charges admitted to the engine-cylin er.

Oneobject of the invention is to provide an improved device of the character stated,

which will facilitate the running, of the en; gine alone or' under 'lightg load with an economy of fuel, and. prevent the stoppage of the engine through lack ofnsufiicient fuel supply on occasions when the load is suddenly removed and the governing slide is practically closed to prevent the engine from racing.

Another obj ect' of the invention is to provide a means whereby the action of the centrifugal governor which controls the governing slide for the charge may be varied, so

as to exert a greater or less closing action upon said slide under a given engine speed. Other minor objects "and advantages-of the invention will be apparent from the following description.

Our invention, in'one p'ractical for-minthe engine-cylinder, and 6 the cyIinder head V suitably secured thereto, which head is, as

usual, hollow, and is ported .to form the admission and exhaust passages 7 and 8, respectively, for the supply of .the explosive charge and the discharge of the products of combustion. The usual cam-controlled supply and exhaust valves 9 and 10, respectively, are also indicated in Fig. 1;

Formed across the outer end of the supply-conduit 7 is a grid-shaped valve-seat 11, over which is secured a hollow casting 12 forming within itself a mixing-chamber 13, leading into which is the air-supply passage 14:. Integral with or secured alongside of the casting 12 is a second casting comprising a vertlcal-float-chamber 15 and a valve chamber 16. In the ,latter is a pin-valve 17 controlling the supply of hydro-carbon fuel through a valve-seat 18, to which the fuel is supplied through a pipe 19 from apump 20 (Fig. 1), preferably actuated from a cam on the side shaft 21 of the engine in a manner common and well understood. In the "float-chamber 15 .is a float 22, which,

through a pivoted lever 23, automatically controls the fuel-intake 17 closing said valve when the body of fuel in the communi-v cating valve and float chambers has reached a predetermined height, and automatically opening said valve'when' said fuel "falls below a redetermined height.

, The' hottom of the float-chamber communicates through a duct or passage 24.-'with a small fuel-chamber 25'formed 1n the lower wall of the casting 12; and from said chamber 25 rises an axially-cored nozzle 26, said nozzle rising to a height slightly above the maximum level of the liquid fuel in the float-chamber, and preferably having its tip slightl hollowed or concaved, as shown. Direct y abovethe nozzle 26 is a manuallyo erated valve 27, through which the size '0 the opening in the tip of the nozzle for the discharge of fuel may be regulated.

Slidably mounted on the grid-valve seat 11 is a rid-valve 28 constituting the governing sli e for the explosive mixture on its, way to the engine-cylinder. This slide is ac tuated to more or less open or close the passages between the grid-bars of the seat by a overnor mechanism on the side shaft 21, as follows: 29 designates a rock-shaft suitably mounted in the engine-frame, said rock-shaft having fast on one end thereof a laterallyprojecting arm 30 (Fig. 4), the outer end of which is pivotally connected to the lower end of the stem 31 of the slide 28. The other end of the rock-shaft 29 carries an upwardlyextending yoke 32, the arms of which ema spring 36.

- groove 38 in the sleeve 33. From this it will be seen that as the governor. expands under the centrifugal action of the Weights 35, the collar 33 will be moved longitudinally on the shaft 21, the shaft 29 will be rocked, and the slide 28 will be moved along the grid-seat 11 in a direction to contract the openings for the passage of the discharge; and,vice versa, as the speed decreases and the governor contracts, the shaft 29 will be rocked in the opposite direction, opening thepassages through the grid 11.- i

We have found in practice that where the engine is drawing but lightly on the mixing mechanism, owing to running slowly, or owing to the practically complete closure of the supply-passage by the sl1de'28, as when the load is suddenl removedandthe engine races, the suction e ect is insufiicient to. draw the oil up through the tip of the nozzle 26 and properly vaporize and mix the same. To remedy this, we provide a tube 39, which ignounted at one end in and through the s 1 e, borhood of the upper end of the nozzle 26.

This tube concentrates, as-it' were, the -suc-.

tion effect upon the air in the vicinity of the tip of the nozzle, 26, thereby producin a suflicient vacuum'efi'ect to draw the Euel therefrom, where the same suction efi'ect distributed throughout the entire cross-sectional area of the mixing-chamber would be insuflicient; and hence this device affords a provision for continuously running the engine under light charges suificient to keep the same'in motion, and obviate the annoyance of re-starting whenever the engine has stopped through its failure to induce a sufii cient charge to maintain its operation.

In.F 1g. 4 we have illustrated; a sim le device for graduating the throttling e ect of the governor upon the slide 28; this device consisting of a lever 40 pivoted at 41 to a fixed quadrant rack 42,. referably' located at a convenient oint in front of the cylinder-head, one end of said lever 40 being connected through a spring 43 ahd clip d4 to the stem 31 of the slide 28, and the handle end of the lever 40 being provided with a suitable spring-pressed deteht engaging the teeth of the quadrant. rack. The spring 43 opposes more or less the centrifugal tend ency of the governor weights, thus rendering the slide 38 more or less susceptible to the controlling effect of the governor we ghts, according to the tension under which the spring 43 is placed. For instance,

and at its other end lies in'the neigh-- when the engine is to be operated at an increased speed, the spring 43 will be placed under considerable tension, so that practically the full speed of the engine can be developed. On the other hand, when the speed is to be reduced, the spring 43 is adjusted to exert but little or no effect upon the slide, thus leaving the governor free to alone control the latter.

1. In a charge-forming mechanism for engines, the combination with a mixing cham-. her having an air supply passage leading thereto and an oil supply nozzle projecting therein, of a valve controlling the communication of said mixing chamber with the induction passage of the engine, and a tube carried by said valve, said tube extending inwardly of the mixing chamber in a direction at right angles to said oil supply nozzle to a point adjacent to the delivery end of the latter and exerting a local suction thereon when the valve is closed, substantially as described. I

r 2. In a charge-forming mechanismfor enines, the combination with a mixing-chamer communicating on one side with the in- .end lies adjacent to the delivery end of said nozzle, producing a local suction efi'ect upon the oil in the latter, and when said valve is opened, said tube is without substantial effect upon said delivery nozzle, substantially as described.

3. In a charge-forming mechanism for engines, the combination with a mixing-chamber formed with an air-supply passage, and communicating with the induction passage of the engine, of an oil-supply nozzle rojecting upwardly into said mixing cham er, means for maintaining a supply of oil in said nozzle at a'height below the delivery end thereof, a valve between said mixing chamber and induction passage, a tube carried by said valve and extending inwardly of the mixing chamber whereby to produce alocal suction effect upon the delivery end of said nozzle when said valve is closed, a

governor mechanism connected toiand op-' erating said valve according to the speed of the engine, and means for opposing the closing movement of said valve,-substantially as described. I

4. In a charge-forming mechanism for engines, the combination with a mixing chamber formed with an air-supply passage, and communicating with the induction passage of the engine, of an oil-supply nozzle projecting upwardly into said mixing chamber, means for maintaining a. supply of oil in said nozzle at a height below the delivery end thereof, a. valve between said-inixing chamber and induction passage, a tube carried by'said valve and extending inwardly of the mixing chamber whereby to produce a local suction effect upon the delivery end of said nozzle when said valve is closed, a

JAMES A. CHARTER JOHN CHARTER.

Witnesses for James A. Charter:

L. T. MANN,

CLARE L. Rosnxow. \Vitnesses for John Charter:

ALEX. S. Jnssur, MATTIE B. BLISS.

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