US878933A

US878933A - Fuel-feeding mechanism for internal-combustion engines.

Info

Publication number: US878933A
Application number: US31176506A
Authority: US
Inventors: Francis W Brady
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-04-14
Filing date: 1906-04-14
Publication date: 1908-02-11
Anticipated expiration: 1925-02-11

Description

PATENI'ED FEB. 11', 1908-.

v F.- W. BRADY. PUB-L FEEDINGMEGHANISM FOR INTERNAL COMBUSTION ENGINES.

AiPLIOATION FILED APR.14, 190B.

4,.snBETs-snnnT 1.

Mil

m.'s7s,9ss. PATENTEDFEB. 11, 1908.

- P. w. BRADY.

: FUEL FEEDING MECHANISM FOR INTERNAL COMBUSTION ENGINES.-

- V I APPLICATION TILED APB. 14. 1606.

' I 4 mama-sans! 2.

mzesses PATENTED PEBLll, 190s.

NOL 878,933,

Ppw. BRADY. PUBLSBEDING MECHANISM FOR INTERNAL COMBUSTION ENGINES.

- APPLICATION FILED APR; 14, 1906.

PATENTED FEB. 11, 1908,

' F. W. BRA'DY. W FUEL FEEDING MECHANISM FOR INTERNAL COMBUSTION ENGINES.

BPLIOATION FILED APB. 14, 1906.

5. E J M FRANCIS \V. BRADY, OF ENGLEW'OOD, NEW JERSEY.

FU'EL -F EEDING MECHANISM FOBINTERNAL-COMBU STION EKG-INES.

Specification of Letters Patent.

Patented Feb. 1 1 1908.

Application filed April 14. 1906. smafm. 311.765.

To all whom it may concern: I

Be it known that I, FRANCIS W. BRADY, a

- citizen of the United States, residing at Englewood, county of Bergen, State of New ersey, have invented certain new and useful Improvements in Fuel-Feeding hlechanism for Internal-Combustion Engines; and I do hereby declare the following to-be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements infuel feeding mechanism for internal combustion engines, and has for its object to provide mechanism whereby a h drocarbon 011 is fed to a vaporizer periodica ly in predetermined quantity, and whereby. the fuel feed is abruptly begun and ended at the proper times,

and after-drip is prevented.

My improvements are particularly applicable to, and are herein described in connection with, an internal combustion engine in which the oil is periodically fed to a vaporizer in the path of the air entering the combustion chamber, and in which the period of oil feed continues during part only of the suction stroke; The utility is not, however limited ,to such engines.

Referring to. the drawings, Figure- 1 is a side elevation of the engine cylinder, show- 'ing the mechanism for actuating the rock shaft, which operates the fuel feed and valve mechanism; Flg. 2 is a front elevation of the same, with parts broken away; and Fig. 3 is a to plan view. In each of these figures the Inlet and outlet valve mechanisms have been omitted for clearness of illustration. Fig. 4 is a front elevation, partly in section on an enlarged scale; Fig. 5 is a detail view of a m'odi cation; Fig. 6 is a cross section of the line '6.6 of Fig. 4, Fig. 7 is a bottom plan view of Fig. 5 with the valve removed, and Fig. 8 is a central section of the engine through the line 88 of Fig. 3 and showing.

the inlet and exhaust valvemechanisms.

The same reference numerals are applied to like parts'throughout.

The cylindrical casing 11 containing the combustlon chamber may be of any desirable form, and should be provided with an ap ropriate water jacket. The base of the ey inder carries a bracket b, in which is jour naled a cam shaft 0, which may be driven from the crank shaft of the engine, (not shown). This cam shaft carries a cam d,

which engages with a roller 6, on the end of an arln f, pivoted inga bracket g, which is also attached to the base of the cylinder. At the other end of the arm f, is pivoted a connecting rodh, which is pivoted at its upper end to a horizontally extending arm 0,, rigidly fastened to a rock shaft j, journaled in brackets k, bolted to the casing a.

m. This sleeve 1 and arm m are rigidly secured to the rock shaft and move therewith. The fork of the outer end of the arm m cm.- braces a flanged collar n which is placed on the reduced upper end of the valve stem 0 and clamped in place by a nut p. The stem 0 passes through the head of the cylinder and carries at its lower end a bell-shaped valve 1', adapted to be seated by an upward movement of the rock shaft on an ap ropriate seat between the combustion cham er of the engine and the valve chamber 8 in the head of the cylinder.

Surrounding the valve stem 0 is a tubular casing t, screw-threaded at both ends and fitting snugly within a cylindrical opening in'the cylinder head. This casin t forms a bearing surface for the stem 0, an is secured in posltion by the nuts screwed on to its upper screw-threaded end, as shown in Fig. 4. In proximityto the valve stem 0 a tubular casing u is mounted in a second cylindrical openmg in the cylinder head At the upper end of this casing is a contracted opening, through which the rod-'u passes, and by which it is supported out of contact with the sides of the tubulai casing u, so that an oil chamber is formed between the interior surface of the casing u and the rod 1;. This rod 41 carries at its lower end a conoidal enlargement w, which forms atonce a valve for controlling the oil flow and the piston ofa pump for ositively feedin the oil, as will be hereina ter explained. urrounding the rod 11 at its upper end is a stuffing box a; of suitable construction, and screwed to the top of the casing u is thecap 3 having a'central projection surrounding the rod 1), and to the top of the rod '0 is screwed the cap 2 having a central recess. A compression spring a is mounted between the caps y and z, the lower end of the sprin surrounding the projection of the cap y and the upper end fitting in the cap 2. 1 i

A screw-threadedipin-b' is su ported in a lug c on the arm m immediate y above the center of the cap 2. An oil supply pipe d is This rock shaft carries a sleeve l, carrying a forked arm.

cylinder head, and surrounds the lower end This casingle' has a I faces form a cone engine is in about intot heated by her and the sharp pro chamber mixed 'with the' air,

of the cylinder, in which the casing tlsfitted,

has an enlarged internally screw-threaded portion at its ower. end, into which a casing. e is adapted to be screwed. This casing fits. into a recessed portion in the'lower face of the of the casing t. Screw threads on the interior surface of the casing e enga e with screw threads on the exterior surface 0 the casing t.

contracted openin "sure stem 0 and has a bevele face against which the beveled end of .the casing t fits. Cut in the face of these beveled surfaces area series of grooves g forming flat oil ducts(see Fig. 6). These two beveled sur rounding t Immediately above this cone feedand surrounding the casin .t is an annular distributingrecess' into w ich opens alaterally and downwar ly extending glassage g which communicates with a cylin ical chamber h immediately beneath the head w on' the rod vi Above this chamber h is a screw-threaded cylindrical openin into which the lower screw-threaded en of the casing u fits.

The operation of this device is as followsz The cam 11 is driven from the ,crank shaft of the engine. by a reducing gearing of such character that the cam rotates once for every two revolutions of thecrank shaft. In the osition shown in Fig. 1, the camhas raised the outer end of the armf and thereby rotated the rock shaft 9' and depressed the arm m to open thevalve At t is position the the middle of its exhaust stroke and the products of combustion are being forced past the valve! and out through an exhaustort B in the chamber s by t e .1" is closed,whereby the feed for the liquid fuel.

m is pressed :oil continues sure on the oil supply due to thee in-stroke vo the piston. During this instroke and the followin 'outstroke, the cam continues to hold the va ve 1' open. a The suction caused by the out-stroke of the piston closes the exhaust port B and opens an airinlet ort A in the chamber .3, drawing air 's chamber and across the face of the valve r. Durin the continuation of this out-stroke, the s arp rojection on the cam d comes under the ler on the end of the arm f and rocks the aft j and the arm m so far that the pin b comes into/contact with the capz and presses down the rod '0, feeding .the oil'to the ace of thelvalve 1' in the manner hereinafter described. This valve r is the heat of the combustion chamorms an efficient vaporizerfor the fuel which is carried into thecombustion which continues to sweep across the valve 1. vAt approximately the end of the out-stroke ofthe piston 'e'ct'ion on the cam d rides from under the ro er e on the end'of the arm f allowing the farm to move I downward and:-

in either the beveled surface screwing in and out recess rock the shaft y' and the arm m to close the valve r. By this same movement the 'pin 1) is lifted from the head 2 of the rod 11 and the spring a, returns. the-rod'to'the position shown in Figi 4. The construction is such that the oil I ee'd is stopped beforethe valve air continues to sweep across the valve '1' after the oil feed has stopped, thereby completely clearingthe chamber 8 and the face of the valve 1- of fuel. During the next in-stroke 'of the iston, the gases are compressed in thecy inder and ignited .in an appropriate manner, and the next outstro e 15 the explosion stroke, during which they valve rremains' closed. At the beginni of the next in-stroke of the piston, the va ve 1 is opened shown in Fig. 1', thus completing the cycle 7 of o erations. v a T e operation of the oil feed is as follows Solong as the pin b is out of contact with the cap 2 thespring 0; holds the head 10 on the rodv against its seat on the casing u, thus retaining the oil in'the chamber' within this casing. The chamber h and the downwardly inclined oil duct .9 form a trap in which, during the operation of the .engine and when the oil valve is closed, a small quantity of oil collects from each preceding stroke and is retained in close proximity to the distributing recess so that when the rod down by the in b it instantly forces the 011 in the chem er h through the grooves q .onto t 1e valve 7' in'flat jets,'and as long as the rod 1) is held down the to beforced in jets b the presevation of the fueltank 0, onto the valve 1'. When the pin 1) is lifted from thecap. z, the head w-is returned to its seat and the oil collects again in the duct g and the chamber h owing to the downward inclination of that duct. The -upward movement of the head w, which-fits -snu ly the chamber h,

causes a slight back dra t through the duct 9. and the oil pasby the cam d,. 'as

and duct g I sages leadingv therefrom to the valve 1, and,

consequently, the flow of 'oil is abruptly and certainly stopped anddripping is revente'd. Thisis a valuable feature in any 0i ticularly so in the above described cycle of operations. i

The passages from the cylindrical recess f to the valve stem may be made by grooves or of the casing e or both. I

It is obvious that the time during which the rod 1) is depressed may be varied by the'screw-threaded pin b In Figs. 5 and 7, I have shown a IdIIlCfition in the construction of the feed cone whlch consists in changing the direction of the oil pas'sag'esfrom the annulardistributing f tow the valve 'rf.

end'of the casing t. are directed outwardly feed, par"- of the casing't In this modification the bevels on the casing diand' the lower under ressure, and thence through the ducts chamber passes, a stem for said valve, a series ofducts arranged about said stem in the form of a cone, a distributing recess communicating with said ducts, and means for feeding a liquid fuel to said distributing r'ecess under pressure and thence through the ducts onto the vaporizing surface.

2. In an internal combustion engme, a vvalve provided with a vaporizing surface across which the air entering the combustionchamber asses, a stem for said valve, a series of c ucts arranged about said stem'in the form of a cone, a distributing recess communicating with said ducts, a means for feeding liquid fuel to said distributing recess onto t 1e valve surface, and means for creating a back-draft through said' ducts after the 'fuel feed.

3. In an internal combustion engine, a

combustion chamber, a valve across, which sure through the ducts against said stem, and

thence onto the valve surface at intervals.

4. In an internal combustion engine,- a

combustion chamber, a valve across which the air entering the combustion chamber 5 passes, a stem on said valve, oil ducts spaced:

about and directed downwardly toward said stem and means for feeding oil under pressure through the ducts against said stem, and thence onto the valve surface at intervals,

.0 and means for creating a.backdraft through said ducts after'the oil feed.

'5. In an internal combustion engine, a

' combustion chamber-, an air inlet valve communicating with the, combustion chamber and providedwith a vaporizing surface,

means for feeding a liquid fuel directly onto the vaporizing surface of said valve during part only of the suction stroke, and means for creating a back draft through said port 0- aftcr the fuel feed.

6. In avaporizer for internal combustion engines, an oil inlet port, an oil pump having an reduction port, an oil duct connecting the eduction port. withthe oil inlet port of the 5 vaporizer, and means for creating suction throu h the eduction said not at intervals.

7; In a va orizer for internal combustion engines,'an o1 inletport, a chamber, oil inlet and outlet ports in said chamber, a duct connecting the oil outlet port of said chamber with the inlet port of the vaporizer, an oil suppl connected to the inlet port of said cham er, and a piston in said chamber adapted to open communication between the oil inlet and outlet ports in one position and to close such communication in another posiport of the pump and tion, whereby one movement of the plston sto s the feed of oil to the vaporizer and Wit draws the oil from proximity to the oil inlet ort of the vaporizer into the piston cham er, and another movement of the piston forces the oil in said chamber-into the vaporizer and opens communicationbetween 1 the vaporizer and oil supply.

8. In an internal combustion en ine a combustion chamber, anair' inlet va ve for saidchamber, an oil duct throu h which oil may be fed onto the surface of t e valve, an

oil chamber communicating Withsaid -du ct,,

a piston in said chamber, means for opening the air'inlet valve to admit air to the combustion chamber across the surface of the valve, means for subsequently moving the iston in the oil chamberin'one' direction to inject oil onto the surface of the air valve, means for subse 'uently moving the piston in the opposite irection to create a backdraft through the oil .duct, and means for subse uently closin the air valve.

9'. n all interna. combustion engine, a combustion chamber, anair inlet valve for said chamber, an oil duct throu h which oil may be'fed onto the surface of t e valve, an oil chamber communicating with said duct, a piston in said chamber, an oil sup ly port in said chamber, means for opening the air inlet valve to admit air to the combustion chamber across the surface of the valve, means for subsequently moving the piston in the oil chamber in one direction to force the oil in said chamber onto the surface of the valve and establish communication between the oil supply and the said o il duct, means for subsequently moving the piston in the 0p 0- site direction to close communication etween the oil supplyand said duct, and to create a back-draft through said duct, and

means for subsequently closing the air-valve.

10, An internal combustion e ine having a combustion chamber, an air va ve, a stem on said valve, a rocker engaging said stem, a duct through which oil may be fed onto the surface of the valve, a chamber communicat- 'ing with the duct, a piston in said chamber, an oil supply port in the chamber adapted to .r supply and create a back-draftjthroiigh said -ports. 1 f I chamber to the valve, a plunger in said air valve is-open to force the oil in said chamber into the oil duct and open communication between the oil duct and the oil supply;

11. An internalcombustion en ine having a combustion chamber, an air va vs, a stem on said valve, a sleeve surrounding said stem, a casing surrounding said sleeve, oil ports about said stem between the sleeve and casing, an I annular distribution chamber above said ports between the sleeve and.cas ing, an oil chamber in said casing, an oil duct connecting said distribution and oil chambers, a plunger in the oil chamber, an annular chamber surrounding said plunger andopening into" the oil chamber, a head on said plunger adapted to close the end of the annur lar chamber when the plunger is withdrawn, means I for supplying oil to said annular chamber, and means for opening 'the'air valve of the combustion chamber and for actuating the plunger in one directionjto' force the oil in the oil chamber through the oil ort onto the air valve and open communication between said ports and the oil supply,

andin the other direction to shut ofl the oil 12. An internal combustion 'ne a combustion chamber, an an va ve, a Stern on said valve, arocker engagingsaid stem,

and means for feeding oil to the surface of said valve, said '-means comprisingan 'oil chamber, an oil passage leadingQfrom-th'e oil chamberg-an outlet port sa d chamber communicating with the saidoil p'a'ssage,an

oil inletgport in said dilf-chamberja head on" the plunger adapted to close the oil 'inlet portwhen; the plunger is withdrawn, a

spring for withdrawin said plunger, and "an adjustable stop" on t e rocker adapted to move the plunger against the actionof the spring,

"iectioriin Letters Patent N0 87 8 13. In an internal combustion en me,'"a valve provided witha vaporizing'surfaee, a stem forsaid valve, juxtaposed conical sur'- faces surrounding said-stem, fuel ducts [be tween said surfaces, a distributin '-:recesscommunicating with saidducts an 1'neans.'

sg for feedin liquid fuel to said distributin recess un er pressure and thencejthroug qthe ducts onto the vaporizing surface.

ment in the word. an

[amp] chamber passes, a stem It is hereby certified that Letters Patent N BTSfiQS upon the application of Francis W.;Brady, of Engelwood that the said' Letters Iatent should, be read with thiscorrecti may conform to the record-oi" the casein; Pa-tent O'flfice Signed and sealed this1'7-th day ofifmamh, A; 1).,11908.

14. In an internal'combustion engine, a combustion chamber, a valve across which the air entering said chamber passes, a stem on said valve ports about said stem, :1. distribution chamber surrounding said stem and communicating with said ports, an oil ductleading into the distribution chamber, a valve controlling the flow of oil through said duct, means for opening the first men' tioned valve, and means for opening the oil valve while the 'first mentioned valveis open.

15. In a vaporizer for internal combustion engines, an oil inlet port -a chamber, oil inlet and outlet ports in said chamber, a duct connecting the oil outlet port of said chamber with the inlet port'of the vaporizer, an oil supplv connected to' the inlet port' of said I chamber, and means in said chamber for opening and closing communication between thedinlet and outlet ports to control the oil fee 7 16. In an internal combustion engine, a

valve, a stem' on the valve, a sleeve surrounding'th stem andhaving a beveled surface. at its end, a'fcasing surrounding the sleeve and havin a. beveled surface adapted to cont-act" with the beveled surface on the sleeve, oil ducts'about the stem between the beveled surfaces, and means for fee'ding'oil to'saidductsl' '17. In an internal valve provided across which the air enterin .or said valve a series of ducts arranged- 'abputsaidstem, a

distributin recess communicating with said ducts', an 01 duct leading into said recess and downwardly inclinedlaway therefrom, a

chamber in which the duct terminates, the

chamber and duct together forming a reser-' combustion engine "a with a vapor zing surface the combustion voiigand aplunger-op'erating in said chamrecess quickly forced onto the vaporizing sur ace.

r in e vw 4 ew: Jersey, for animpro've- Fuel-Feeding Mechanism for Internal Combustion 'Enginesfl-i,anferror appears in the printed specificationrequiring correction, as ifollo ws'fPage 3, line 63,

on therein that the same 1 i o. c. BILLINGS; a Acting Cdmmiasioner of Pcten tk ber, whereby the 611 collects in said reservoir close proximity to the distributing and upon the movement of the plun' eris' .r supply and create a back-draftjthroiigh said -ports. 1 f I chamber to the valve, a plunger in said air valve is-open to force the oil in said chamber into the oil duct and open communication between the oil duct and the oil supply;

ment in the word. an

chamber in which the duct terminates, the

on therein that the same 1 i o. c. BILLINGS; a Acting Cdmmiasioner of Pcten tk ber, whereby the 611 collects in said reservoir close proximity to the distributing and upon the movement of the plun' eris' It is hereby certified that in Letters Patent N 0. 878,933, grented February 11,1908, upon the application of Francis W. Brady, of Engelwood, New Jersey, for an improvement in Farsi-Feeding Mechanism for Internal Combnstion Engines, an error appears in the printed specification requiring correction, as'rfollows z Pa ge 3,1ine 63, the word a'n,should be stricken out and the words a single inserted instead and that the said Letters Patent shquld be read with this correction therein that the same may oonform to the record of the case in the Patent Ofiice.

Signed and sealed this 17th day of March, A. D., 1908.

[SEAL] c. C. BILLINGS;

Acting Commissioner of Patents,