US1325998A

US1325998A - Albert schmid

Info

Publication number: US1325998A
Authority: US
Publication date: 1919-12-23
Anticipated expiration: 1936-12-23

Description

A. SCHMID AND L. A. MERK.

CAHBURETER.

APPLICATION FILED JUNE 12. ms.

Patented Dec. 23,1919.

n s m ATTORNEY UNITED STATES ra'rn onrron.

ALBERT SGHMID, 0F LONG BEACH, AND LAWRENCE AUGUST MERK SAID MERK ASSIGNOR T0 SAID SCHMID.

GARBURETE'R.

Specification of Letters Patent.

Patented Dec. 23, 1919.

Application filed June 12, 1918. Serial No. 239,686.

To all whom itmay concern:

Be it known that we, ALBERT SoHMn) and LAWRENCE AUGUST MERK, citizens of the United States, and residents of Long Beach, L. 1., and New York city, N. Y., respectively, have made a new and useful invention in Carbureters, of which the following is a specification.

' This invention relates to charge forming devices for internal combustion engines.

The use of heavy not readily inflammable liquidfuels such as kerosene and distillates and many grades of so called commercial gasolene in lnternal combustion engines and especially engines subject to varyln loads makes it important that some means vided by which readily combustible charges may be supplied during the warming up periods as well as when the engine becomes warm enough to care for the combustible charges supplied by the main charge forming device or carbureter.

An object of this invention is to provide an efficient charge forming device including a main carbureter and an auxiliary carbureter both adapted to be heated by the engine exhaust gases under control of an agent for automatically varying the amount of exhaust gases supplied thereto in accordance with the pressure or the vacuum in the engine inlet manifold.

In utilizing fuels which are difficult to vaporize we have found that to obtain smokeless operation the combustible mix ture should enter the cylinders of the engine at a relative high temperature when running at low loads or torques. We have also found that to prevent spontaneous combustion in the cylinders when operating under heavy loads or heavy torques this combustible mixture should enter the cylinders at the lowest possible temperature consistent with smokeless operation. This same requirement also prevails for obtaining maximum output of a given engine.

A further object of this invention therefore is to provide a device for or system of carburation for fulfilling'the above-requirements.

These, as well as other objects, which will readily appearto those skilled in this particular art, we attain in the system diagrammatically illustrated in the single sheet of drawings accompanying and forming a part of this application.

e pro-' In carrying out this invention a main carbureter having a fuel nozzle 2, a main air inlet 3, a supplemental air inlet 4, a mixture passage 5 and a float chamber 6 supplied Withliquid fuel from any suitable source through pipe 7 is connected to inlet manifold 8 of the engine.

A jacket 9 surrounds the fuel nozzle and the mixture passage and thus provides a heating chamber 10 which is connected up to the exhaust manifold 11 of the engine through a suitable pipe or conduit 12. The main exhaust pi e 13 of the engine connects with a SllltiHJlG muffler not shown and beyond a valve device 14, to be hereinafter described, is connected to heating chamber lO'by means of a branch pipe 15. The main carburetor is provided with a throttle valve 16 which controls the flow of mixture through passage 5 andtherefore the delivery of fuel from nozzle 2. The throttle valve 16 will be-under the control of the operator of the engine through mechanism connected with lever 17 for operating said valve. Valve 14 consists of a balanced valve 18, the stem 19 of which connects with a piston 20 operating within a cylinder 21 and normally the valve is held open by means of a spring 22 interposed between piston 20 and head 23 of the cylinder. End 24 of the cylinder is open to the atmospherethrough a port 25 and the opposite end of the cylinder is connected up to inlet manifold 8' of the engine by means of a pipe 26 and in this pipe a valve 27 is included for the purpose of cutting out the automatic operation of said valve device 14 when the fuel supplied to the main carbureter is a readily inflammable liquid such as high grade gasolene.

By closing valve 27 the valve 18 will normally be held in open position by spring 22.

For the purpose of starting and for running the engine during warming up periods we have included in the system a starting or auxiliary carbureter and this may be similar to one or the other of those illustrated and described in applications for Letters Patent filed concurrently herewith by Albert Schmid, one of the inventors in this application. The starting carbureter as illustrated consists of a tortuous passage 30 coiled about a tubular member 31 which forms a section of exhaust pipe 12 but which is preferably insulated from the other sec tions of the pipe by means of heat insulating or NEW YORK, N. Y.,

of a controlling valve device 32 supplied with fuel through a pipe 33, and the mixture,

from the tortuous-passage enters the inlet manifold 8 of the engine by means of a connecting pipe 34. An electric heater 35 arranged in heat transferring relation to said tortuous passage is supplied with electric current from a source of supply such as a storage battery 36 through lines 37 controlled by a switch 38. The tortuous passage and the-electrical heater are submerged in a heat storage material 39 such as lead which is poured around the walls of the tortuous passage and the electricheater so as to bein heat transferring relation to the tortuous passage so that heat from the exhaust pipe will be transferred to the heat storage material.

The auxiliary carbureter is under the control of the operator by means of a bell crank lever 40 and other suitable connections (not shown) which control the operation of the valve device 32. In starting up the system, throttle valve 16 of the main carbureter will be closed and electric current will be turned on to the electric heater element, and on account of the relatively small size of the starting carbureter the walls of the tortuous passage will be heated in a short time sufficiently to supply heat to the mixture flowing through the passage so that readily combustible charges may be supplied to the engine. Y

During this time the valve 18 will be closed owing to the vacuum in the inlet manifold which will be transmitted to the spring chamber of valve device 14:; atmospheric pressure operating on piston 21 against the stress of spring 22 holding said valve closed. All of the exhaust gases therefore from the engine will pass through exhaust passage 12 heating the tortuous passage of the auxiliary carbureter aswell as the heat absorbing material and will also heat the main carbureter as it is caused to pass throu h heating chamber 10 on its way to the mu er. As soon as the main carbureter is sufficiently heated to care for the load on the engine, the auxiliary carbureter will be shut off by closing'valve device 32 and all of the charges will be supplied by the main carbureter.

The valve device 14: will act automatically in accordance with the pressure in the inlet manifold to properly proportion the amount of exhaust gases passing through the heating chalnber 10 and at light loads or torques all of the exhaust gases will be sent through heating chamber 10 thus heating up the mam carbureter body. As the load thereby preventing spontaneous combustion in the engine cylinders as well as insuring maximum engine output.

Having thus described our invention what we claim is 1. The combination with a main carbureter, of an auxiliary carbureter and heating chambers for both of said carbureters through which exhaust gases from the engine are adaptedto pass in series relation.

2. The combination with a main carbureter and anauxiliary carbureter having mixture passages arranged in parallel relation one to the other, of heating chambers for both of said carbureters through which exhaust gases from the engine are adapted to pass in series relation and means the operation of which is dependent upon the pressure in the engine inlet manifold for controlling the amount of exhaust gases passing through said chambers.

3.- The combination with an engine inlet manifold, of a carbureter attached thereto and provided with a heating chamber, 1neans' for passing exhaust gases through said chamber, and means the operation of which is dependent upon the pressure in the inlet manifold for controlling the flow of exhaust gases to said heating chamber.

4. The combination with a main and an auxiliary carbureter,

heated by exhaust gases from the-engine to both adapted to be passing exhaustgases in relation to said carbureters and a controlling device the operation of which is dependent upon the pressure within the engine inlet manifold for controlling the flow of exhaust gases to said carbureters.

5. The combination with an engine inlet manifold, of a carbureter attached thereto and provided with rounding the same, means for causing exhaust gases to by-pass said chamber and a controlling device the operation of which is dependent upon the pressure within the engine inlet manifold for controlling the flow of exhaust gases to said heating chamber.

6. The combination with an engine inlet manifold, of a carbureter attached thereto and provided with a heating chamber, a conduit for leading exhaust gases through said operation of which is dependent upon the a heating chamber 'sur-' pressure in the inlet manifold for controlling the operation of said valve.

he combination With a main carbuinlet manifold for controlling the flow of exhaust gases through said chambers. 10 In testimony whereof, we have hereunto reter, of an auxiliary carbureter, heating subscribed our names this 5 day of June, chambers for both of said carbureters through 1918.

which exhaust gases from the engine are adapted to pass, and means the operation of ALBERT SCHMID.

which is dependent upon the pressure in the LAWRENCE AUGUST MERK.