US1312468A

US1312468A - Carbureter

Info

Publication number: US1312468A
Authority: US
Publication date: 1919-08-05
Anticipated expiration: 1936-08-05

Description

IRVIN E. BARRICKLOW, 0F SAN FRANCISCO, CALIFORNIA.

CARBURETER.

Specification of Letters Patent.

Patented Aug. 5, 1919.

Application tiled October 18, 1917. Serial No. 197,233.

To all whom t may concern:

Be it known that I, InvrN E. BARRICKLOW, a citizen of the United States, residing at the city and county of San Francisco and State of California, have invented new and useful Improvements in Carbureters, of which the following is a specification.

This invention relates to a carbureter for internal combustion engines; and one of the objects of the invention is to provide a simple and effective construction which can be used with gasolene or with lower grade fuels, such as distillate, kerosene and the like, or in which gasolene may be employed for starting the engine and the lower grade fuel for running the engine under load when it has been sufficiently heated. Another object oiI the invention is to provide means operable in unison with the throttle valve for automatically maintaining a predetermined opening between the needle valve and the throttle valve, so that a uniform mixture may be maintained regardless of the opening of the throttle. Another object of the invention is to provide means for supplying water vapor to the explosive mixture and in conjunction therewith to provide means for automatically admitting and varying said mixture in accordance with the speed of the engine or the load thereon. Further objects will hereinafter appear.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which- Figure 1 is a central, vertical, longitudinal section through the carbureter.

Fig. 2 is a side elevation of same.

Fig. 3 is a plan section on line 3--3 of Fig. 4.

Fig. 4 is a plan view of the bottom section of the carbureter.

Referring to the drawings in detail, A indicates a cylindrical-shaped casing, the upper end of which is flanged as at 2, to permit it to be secured to the intake manifold of an internal combustion engine. Mounted in the upper end of the casing is a throttle valve, generally indicated at 3, and mounted in the lower end of the casing is a spray nozzle 4 and a needle valve 5.

The spray nozzle is formed in a removable bottom section which consists of a threaded, annular iange 6 adapted to be screwed into the lower end of the casing, as shown at 7. Formed integral with said threaded, annular Bange are three

arms

8, 9 and 10, and supported by said arms, centrally of the flange, is a center section 11 1n which is mounted a plug valve 12. Formed in the upper part of the center seetlon is the spray nozzle 4, and supported by the center section and surrounding the spray nozzle is a cone-shaped cap 13. on the lower end of which is formed an annular flange 14. The cap 13 is spaced from the nozzle as is also the flange 14, thereby forming an air passage which will hereinafter be termed the primary air inlet.

The

arms

8, 9 and 10 are each provided with a passage (see Figs. 1 and 4); the passage 8 being connected with a source of gasolene supply, the passage in arm 9 with a distillate tank, and the passage in arm 10 with a source of water or Water vapor supply, as the radiator of a car. The passages formed in the arms 8 and 9 communicate with the plug valve and as this is provided with one radially disposed passage 15 and a central vertical passage 16, turning of the plug valve, by means of a handle 17, permits either gasolene or distillate to be delivered to the spray nozzle; the discharge through the nozzle being regulated mechanically by the needle valve 5, as will hereinafter be described. A stuffing box 18 is preferably placed on the lower end of the plug valve to prevent leakage at this point.

The passage formed in the arm 10 does not communicate with the valve but with a vertically extending tube 19 which passes through the flange 14 formed on the cap 13. The discharge of vapor through the pipe 19 into the carbureter proper is controlled by a piston valve. This piston valve consists of a cylindrical section 2O and an annular flanged, inturned bottom section 21. This bottomv section of the piston valve is normally ada ted to seat on the flange 14 and when in this position forms a closure for the passage 19, thereby preventing water vapor from entering the carburetor except when the piston valve is lifted from its seat. The valve is not only retained on the seat by means of its own weight but also by a spring 2Q- interposed between the valve and n pair of bracket arms 23 fori-ned in the renter portion of the casing. These bracket ,arms also carry a centralhhub member 24 casing A and is provided for the purpose of supporting the throttle valve and also as a support :lor a ffani 2G. Extending half way into the throttle valve and secured thereto in any suitable manner is a sleeve shaft 27, and secured on the outer end of said sleeve shaft is a lever by which tthe throttle valve is opened and closed from the steering,l wheel of the car in the usual manner.

Formed on the sleeve shaft 27, adjacent to the lever 28, is a belli crank member 29, and carried lby each iarm of the seid miember is an adjustin screw 30 which sadapted to engage a stop ug 31 formed on the outer face of the casing A; the crank wrms .'29, to-

ether with the set screws carried thereby,

eing rovided `to limit the movement of the thrott e valve. The shat. 25, Whiohourries the cam 2G, extends beyond the Sleeve shaft 2T and thereby serves as a support for an arm 32 which ermits the position of the cam 26 to be a justed with relation to 'the throttle valve. This is accomplished by forming a lug 33 on the throttle valve lever 28 which carries an adjusting screw 34. This screw .passes 'through fa slot in-the aum 32 and a spring -35 vintenposed between vthe arm 'and the lug 33 'normally retains the shaft 25 and cum 26 in a, fined vand adjusted position with lrelation to the throttle verve oncenn adjustment has been made.

The lcam 26 =is positioned in 'direct alinement with the -stem 15 of the -needle `velfve and its 'face is suiciently wide to Aengage the same. The Ilar er portion of *the cam engages the stem d the needle valve when the'throttle valve iis" raotically closed, thereby forcing the nee le Vvalve down against the s ray nozzle and completely reventing any ischarge thererom. A shg t opening movement of the throttle valve, however, turnsthe com to a position where the Ineet'ile valve muy open a proportioned amount. Further opening of the throttle waive permits a greater opening of the needle valve and 4it is, ftherefore, possible 1to maintain la proportional opening between the needle valve and throttle valveet all times, regardless of their position, which automatically maintains a uniform mixture. The setting of the cam, which may be adjusted by means of the screw 34, is preferably such that idling position of the throttle valve will permit a slight opcnin r of the needle valve, this being necessary wien starting and also when idhng.

In actual operation, when lt is desired to start Athe engine, it is only necessary to turn the lever li?, with connected plug` valve until connection is made with the gasolene passage formed on the arm 8. Cranking of the Car will then create a suiicient suction in the intwke manifold and carburetor to permit air to be drawn through the space formed between the

airins

8, 9 and 10 and the space formed between the spray nozzle and the oa 13, this air passing under the needle va ve in the direction of arrows a lifts i1; suficiently to ermit thc desired amount oi fuel to .pass t rough the, nozzle. A practically homogeneous and rich mixture is thus obtained as the primar Y air inlet open insg iS annular and the needle valve is provided with an annular shoulder 5", over which the ai'r and gasolene is evenly distribuited. rvlhe lange annular contact area thus provided .permits `a better atomization; hencel a illetter mixture is obtained.

'Starting of ruhe engine or idlinr speed requires `comrparatively `little air. "h1s air is, therefore, supplied entirely through the prinrairy laiir iirnlet opening and movement or admission of air through the piston valve is not obtained until the speed is increased. The higher suotions produced under greater speeds 4l'iits ythe valve away from the shoulder or seat 114 against the tension of spring 22 :and admits a secondary supply of air between the shoulder 14 and the lower end of the :piston valve. A leaner mixture under hrigh speeds may in `this manner be obtained While a comparatively rich mixture may be maiintained fior starting -by regulating the position orf the cam with relation -to the needle vailve und zli'heth-rottle valve. A rich mixture maiy also be obtained VWhen the enpine is running 'et .high speed and under =a ieevy load by again adjusting the position of the cam. -These adjustments, however are made when 'theoarbureter is first applied toanengine end one setting or adjustment is generally suliicient to regulate the mixture so .that it vis ideal *for different speeds and loads.

The ipresent construction and 'arrange ment of yipnrts Vpermit fa Icompact, simple larrangement Whioh vimay be easily adjusted for varying conditions and, furthermore, permitan engine'to be started on gesolene wheneold and to be run on distillate or any therJsuitable low fgrade fuel, once the engine has become heated Athe change being permitted without stopping theengine as ya connection between 'the dashboard and the lever 17 permits the position of the plug valve to be instantly changed from gasolene to distillate. The Water vapor is only admitted when the piston valve opens, or, in other Words, when the engine is running inder comparatively high speeds or heavy Everything provided is automatic in operation as regards water vapor admission and the regulation of fuel, as the needle valve can only open in proportion to the opening of the throttle. The ma'or portion of the air Will at ail times pass t rough the annular primary air opening, and as this is arranged around the spray nozzle a homogeneous mixture is obtained. The wings of the throttle valve are preferably offset with relation to each other, as shown in Fig. 1, to permit the valve to assume an absolutely vertical position when entirely opened.

The materials and finish of the several parts of the carburetor may be such as the experience and judgment of the manufacturer may dictate.

I wish it understood that various changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims and that I do not wish to limit myself to the specific desi and construction here shown.

ving thus described my invention, what I claim and desire to secure by Letters Pat ent is- 1. In a carburetor, a needle valve ha'ving a stem the upper end of which is free, a throttle valve, a cam connected to the throttle valve and having wiping engagement with the free upper end of the needle valve stem, and a positive connection between the cam and throttle valve having turnable threaded means for adjusting the position of the cam with relation to the throttle valve by mere turning of the threaded means.

2. In a carburetor, a needle valve having a stem the upper end of which is free, a throttle valve having a lever, a cam adjustably connected to the throttle valve and having wiping engagement With the free upper end of the needle valve stem, an arm in connection with the cam, a screw connection be tween said arm and lever for adjusting the position of the cam with relation to the throttle valve.

3. A carbureter comprising a casing, a spray nozzle mounted in the lower end of the casing, a cone-shaped cap spaced from and surrounding the nozzle forming a rimary air inlet, a piston valve slidaibly mounted in the casing adapted to seat on the cap and to open or close a secondary annular air inlet formed between the cap and the casing, a throttle valve in the casing,

and means for admitting a Water vapor to the carbureter, said means controlled by the piston valve for regulating the amount of vapor admitted. l

4. In a carbureter in combination with a throttle valve and a needle valve, a shaft, a cam on said shaft for operating the needle valve, a sleeve turnably surrounding' said shaft, a lever connected to said sleeve to operate the throttle valve, a bell crank member on said sleeve, means engaging each arm of said member to limit the movement of the sleeve, an arm on said shaft to adjust the position of said shaft and thereby that of the cam, an adjusting screw carried by said lever of the throttle valve and having connection with said arm of the shaft, and a spring encircling said screw for holding the shaft and cam in their adjusted position.

5. In combination with the throttle valve and the needle valve of a carbureter, a cam for operating the needle valve, a lever for operating the cam, an arm connected to the throttle valve and a screw connecting the arm and lever to effect operation of the cam upon movement of the arm and to enable adjustment of the position of the cam relative to the throttle valve by mere turning of the screw.

6. In combination with the throttle valve and the needle valve of a carbureter, a shaft, means operated by said shaft to actuate the needle valve, a lever on said shaft to operate saine, a sleeve supporting the throttle valve, an arm connected to said sleeve to operate same, and a turnable threaded connection between said arm and lever to effect adjustment by mere turning of the threaded connection and operation of said needle valve actuating means upon operation of the throttle valve.

7. In a carbureter, a casing, a nozzle in the casing, a cap spaced from the nozzle to form an air inlet and having an outwardly extending fiange at its base, a tube in communication with a source of Huid supply and having its upper end extendin through said iiange, said flange being s ace from the side walls of the casing to al ow the passage of air, and a piston valve in the casing engageable with the upper end of the tube to close same and also being engageable with said iiange to prevent the passage of air thereast. p In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

IRVIN E. BARRICKLOW. Witnesses:

THos. CAs'rBnne, GENEVIEVE S. DONELIN.

Uopiel o! this patent may he obtained for ilve cents each, by addressing the Commislinner of Patents, Washington, D. G.