US1562806A - Carburetor - Google Patents

Description

Nov. 24 1925. x

R. H. TAYLOR CARBURETOR Filed NOV. 29, 1919 INVENTOF} WiTWESS 02% 2 an 5 5 g4 @ALMW l;m& A

Patented Nov. 24, 1925.

UNITED STATES PFATENTK'OFFICE.

RICHARD H. TAYLOR, OF NEW YORK, N. Y., ASSIGNOR TO SOCIETE DU CARBURATEUR ZENITH, OF LYONS, FRANCE, A

CORPORATION OF FRANCE.

CARBURETOR.

Application filed November 29, 1919. Serial No. 341,519.

To all whom it may concern:

Be it known that I, RICHARD H. TAYLOR, a citizen of'the United States, residing at New York city, in the county and State of New York, have invented a new and useful Improvement in Carburetors, of which the following is a full, clear, and exact descrip tion. 1

The present invention relates to the art of carburetion as applicable particularly to internal combustion engines.

The principal object of the present'invention is to provide a carburetor with means capable of supplying a rich mixture uponstarting the engine which means is absolutely inoperative during the time the enat some point to the atmosphere,

glue is operating on its own power and while operating on a. mixture fed from an idling by-pass. Y

A further object of the present invention is to provide a carburetor having means of the type described, which means is automatically operable ,each time the engine has been brought to a standstill, and is then started.

The foregoing and other objects, together with their attendant advantages, will be apparent as the invention becomes better understood by reference to the accompanying specification and drawings forlning'a part thereof, it being premised that changes may be made in the various details and the manner of operation within the scope of the appended claims without departing from the spirit of the invention.

Figure 1 is a longitudinal section through one form of carburetor having my improved device applied thereto, and

Figure 2 is a section on the line I I-II of Figure 1.

The present invention is applicable to all carburetors of that class in which a measuring orifice placed below the normal level of the fuel, feeds the fuel into and having a passage or passages conducting the fuel into the carbureting chamber; where the effect of the passage or passages is to bring about a gradual lowering of the fuel in the well.

I am aware that heretofore carburetors have been constructed which have been provided with means for supplying a rich mixture upon starting the engine either by the use of a supplemental well, a pump device,

a well open.

' running mixture once or a combination of the two. Such means have, however, been so controlled and 011- erated that they the entire running-period of the engine, or at least during the idling or slow-speed running periodsthereof.- My invention ditl'ers fundamentally from devices of this char- ICtBlXiIl that it diately after the engine hasstarted running on its own power and is operating'on a mixture fed from an idling by-pass, and re-. mains inoperative until after the engine has been brought to a standstill and again started. This operation has by experiment been found to be very successful, in that the properly regulated is not rendered less effective by the feeding of an increased amount of fuel into the carbureting chamber. v

Referring more particul'arlyto the drawings in which I have illustrated my 1mproved device applied to a carburetor of the type shown in Baverey Patent No. 1,186,371,

provided the usual constant level operate with the elements of the invention;

A main well 9 is formed in the casing, adapted to be fed through the calibrated orifice 10, and in turn feeding, through the channel 9, the compensating nozzle 11 sur* rounding or adjacent to the main nozzle 5. A chamber 12 preferably communicates with the well 9 and is open to the atmosphere through a suitable opening 14 above the liquid level therein. Mounted within the chamber 12 is a low-speed feed device comprising a fuel nozzle 15 communicating with a passage 16 entering the carbureting chamber adjacent the throttle valve 8 for feeding fuel to said chamber when the throttle is nearly closed. r

Adjoining the atmospheric well 9 is a sec ondary well 17 of any desired size. This sec ondary well is in turn provided with an opening 18 to the atmosphere, and receives its supply of fuel through the opening or are operative throughout receiving its supply of ceases to function inimewell'when the engine is at a standstilh but is so positioned with relation to the fuel level that as soon as the engine startsrunning on its own power and while it is operating on a mixture fed from the low speed device referred to, the fuel level in the main well will drop below the opening and therefore will not supply the secondary well with fuel. A

tube 20 extends into the secondary well and opens at its upper end into the carhureting chamber preferably above the throttle valve.

With the construction described, the operation will he as follows:

lVhen the motor is cranked, the throttle valve being kept in a nearly closed position, the high vacuum obtained above the throttle will draw gasolene through the passage 16 and, in addition, will draw through the tube 20 the gasolene which has accumulated in the secondary well 17. As soon as the motor is operating if the throttle is kept in the position described, the fuel level in the well 9 will be lowered, as the slow speed feed terminating adjacent the throttle keeps supplying fuel to the motor. This lowering of the fuel is a necessary consequence, due to the fact that the main well is fed through the calibrated orifice 10. All of the fuel entering the carbureting chamber througln the passage 16 must be supplied through the calibrated orifice, and as the well 9 is open to the atmosphere through the hole 14, the air drawn therethrough helps to satisfy the suction so that the flow through the measuring orifice is not a true suction flow. In reality this flowis intermediate a true suction flow and a gravity flow. From the foregoing, it will be apparent, therefore, that in order to produce a flow of fuel through the calibrated orifice there must be a lowering of the fuel level in the main well. The effect of this lowering is to uncover the communication 19 between the main well and the secondary well and thereby prevent any more fuel finding its way into the secondary well as long as the engine is running. as the engine is brought to a standstill, the fuel level in the main well will be raised and the secondary well will again be filled in the As soon, however, I

manner described. In order to accomplish the results desired, the opening for feeding the secondary well must be located below the fuel level in the main well when the engine is at. a standstill, and above the fuel level therein when the engine is running.

The advantages of the present invention arise from a construction in which only a predetermined accumulated charge is fed during the starting of the motor, and this feed is automatically rendered inoperative as soon as the motor is running under its own power, and under such conditions that the idling hwpass or slow speed device is delivering fuel to the motor.

I claim:

1.. In a carburetor, a carbureting passage,

a throttle therefor, a secondary priming fuel feed for said passage communicating therewith and effective with the throttle in substantially closed position, a slow speed feed communicating with said passage and effective upon initial opening of the throttle, and a fuel supply for said secondary feed adaptcd to be drawn upon by said slow speed when the throttle is opened to cut off the fuel supply to the secondary feed when the engine supplied by the carburetor begins operating on its own power and while it is operating on the mixture from the slow speed feed, substantially as described.

:2. A carburetor having a constant level chamber, a carbureting passage, a throttle valve in said passage, an atmospheric well, means for feeding fuel from the atmospheric well to the earbureting passage, means for feeding fuel from the constant level chamber to the atmospheric well, a second well in communication with the upper portion of the atmospheric well, and an auxiliary fuel feed for temporarily feeding additional fuel to the carbureting passage above the throttle from the second well, the feed of fuel from said second well being adapted to be cut off when the engine supplied by the carburetor begins operating on its own power and while it is operating on a mixture from the atmos- RICHARD H. TAYLOR.

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