US878934A - Fuel-feeding mechanism for internal-combustion engines. - Google Patents

Description

No. 878,934. PATEETED FEB. 11, 190

P. w. BRADY.

FUEL FEEDING MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR.14. 1906.

4 SHEETS-SHEET 1.

No. 878,934. PATENTED FEB. '11, 19 08.

I v 4 F. w. BRADY. N v FUEL FEEDING MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLIOATIOH PfLED APB. 14.1906.

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PATENTED FEB. 11, 1908.

- P. w. "BRAD-Y; J FUEL FEEDING MECHANISM FOR INTERNAL comsuamomnemns.

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mga'zmu. PAIENTED FEB. 11, 1908.

v- E. w. BRADY. BBL PEBDI'NGMBGHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR. 14, 1906.

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WITNESSES: v INVENTOR;

I H BY I FRANCIS w. BRADY, or ENGLEWOOD, NEW JERSEY.

FUEL-FEEDING MEGHANIS M FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented Feb. 11, 1908.

I Application filed April 14. 1906x Serial No. 311'766.

To all whom it may concern:

Be it known that I, FRANCIS W. BRADY, a citizen of the lnited States, residing at Englewood, county of Bergen, State of New Jersey, have invented certain new and useful Improvements in Fuel-Feeding Mechanism for Internal-Combustion Engines; and 'I do hereby declare the following tobe a full, clear, and exact description of the invention,

such as will enableothcrs skilled in the art to which it appertains to make and use the same. v

The object of my invention is to provide means for positively and periodically feeding a hydrocarbon oil to a vaporizer in such a way that the oil feed is abruptly begun and ended at the propertimes and after-drip is prevented. a

My improvements are particularly applicable to, and are herein described in connec Referring to the drawin s, Figure-'1 is a side elevation of the engine cylinder, showing the mechanism for actuating the rock shaft which operates the valve mechanism and a or-tion of the mechanism for feeding the fuel.

ig. 2 is a front elevation, partly in section, of the same showing the oil feed valve partly open. From both of these figures the inlet and exhaust mechanisms have been omitted. Fig. 3 is a cross-section on a larger scale showing the oil feed mechanism. Fig. 4 is a cross section on-the line 4.--4 of Fig. 3. Fig. 5 is a detail sectional view of the sleeve 6; Fig. 6 is a cross-section on the line 6-6 of Fig. 5, and Fig. 7 is a section on line 7--7 of Fig. 2 showing the inlet and exhaust valve mechanisms.

The same reference numerals are applied to like parts throughout.

.The cylindrical casing (1 containing the combustion chamber may be of any desirable construction, and should be provided with an appropriate watenjacket. .llhe base of. the

" cylinder carries a bracket 7:, in which is journaled a cam shaft 0, adapted to be driven from the crank shaft of the engine by reducing gearing (not shown) of such character that the cam shaft is rotated once for every two revolutions of the crank shaft. The cam roller e on the end of an arm f )ivoted in a bracket which is also attached to the base of the cylinder. A rod h, connects the other end of the arm f to which it is pivot'edly -at tached, with a laterally extending arm i on a rock shaft j. The red It is also pivoted to the outer end of the-arm i. The rock shaft 7' is journaled in upwardly extending brackets Ir bolted to the casing a, and carries a sleeve Z rigidly attached to it. i This sleeve 1 carries a forked arm m. The fork at the outer end of the arm 2% embraces 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 extends vertically through a tubular opening in thehead of the cylinder and carries at its lowerend a bell shaped valve 1- adapted to be seated by an upward movement of the rock shaft on an appropri ate seat between the combustion chamber of the engine and the valve chamber 8 in the head of the cylinder. Surrounding the stem 0 and fitting snugly in the tubular opening in the head oflthe cylinderis a sleeve 15 screwshaft carries a cam d, which engages with a i threaded at its upper end and having a reduced portion terminating in a beveled shoulder a.

Above the beveled shoulder and between the inner walls of the tubular opening and the reduced portion. of the sleeve t appropriate packing material is inserted and over the sleeve 2! a collar e resting on the top of the tubular opening and having a beveled lower end is slipped and pressed into place by the .nutw screwed onto the upper end of the sleeve t. The lower end of the sleeve t is provided with a cylindrical recessed ortion screw-threaded, as shown, into w ich a sleeve m is adapted to bescrewed and firmly secured in place by a set screw y passing through the sleeve t. The sleeve :0 has an enlargement at its lower end provided with a beveled shoulder, and from the outer surface of this beveled shoulder downwardly directed ducts z are bored inwardly into communication with a cylindrical recess a forming a distribution chamber on the interior of the sleeve Grooves m are cut in the stern in such position as to establish communication between the distribution chamber and the space just above the surface ofthe valve 1" when that valve is open. At the lower end of each groove is a sharp shoulder (see Fig. 3) adapted to throw the oil out onto the valve surface. Excepting at this recessed sleeve :10. fits snug portion the interior of the y onto'the stem 0, sleeve x is of-such diameter as to leave a chamber between its outer surface and the inner walls of the opening through the cylinr der head; In this chamber and sliding on the'sleeve 2c is a collar 1) which is pressed downward *by' compression spring 0 between it and the lower end 'of the sleeve t. This collar b (Fig. 5) is provided with a recessed portion formin an ,oil chamber and communicating with t eoil duct d. and oil supply ipe e. The lower end of this collar 12 as a evel corresponding with the beveled shoulder on the lower end of the sleeve x. The ortion of the collar 1) above the recessed portion fits snugly the interior of the tubular opening in the cylinder head, and is provided with a series of grooves f arranged around its circumference to permit the assage of air as the collar 1) is reciprocate on the sleeve :13. i

The ortion of the collar below the recess is of re uced diameter so as to form a chamber between it and the tubular opening. The 0 ening through the cylinder head is enlarger? at its lower end and screw-threaded on its interior surface to receive a ca 9 which embraces and hel s to hold in p ace the sleeve x and closes the lower end of the chamber between sleeve 1', and the interior surface of the opening through the cylinder head. The valve stem 0 is provided with grooves or ducts which lead th oil from the istribution chamber a to the surface of the valve 1'. Extending laterally throughthe cylinder head is a rod it cut away at'it's inner end to form a shoulder i, and this shoulder 7'. is adapted to engage with the upper edge of the recessed ortion of the collar 6. This rod h is reducer at its outer end which passes through and is held in place by the screw-bolt 7' provided with the lock-nut 7c. Rigidly secured to the arm 72,. outside of the cylinder. head is an arm Z one end of which is connected to the casing a, by a spring m and the other end of which projects into the path of a screw in n se'cured in a collar 0 on'the rod h. he rod 71/ is also provided with an adjustable stop comprising an arm p rigidly secured to the rod and a screw-pin 1* extending throu h said arm into engagement with the top of the casing a.

The operation of this device is as follows The 5 ring m and the screwpin p normally hold t e rod h in the position shown in Figs. '1 and 3, and the shoulder on the inner end of the rod h in a horizontal position, in which position the spring 0 forces the collar I) own into enga ement with the beveled shoulder on the s eeve m. In the osition of parts shown in Fig. 1, the cam d as raised the outer end of the arm f and thereby rotated therock shaft j and depressed the arm 0 to open the valve r. At this position the enbut the and through the grooves in the the gine is in about the middle of its exhaust stroke and, the products of combustion are being forced past the valve 1" and out through the exhaust port B in the valve chamber s by the iii-stroke of the piston. During this in-stroke and the following outstroke the cam continues to hold the valve 1.

0 en. The suction caused by the out-stroke o the' iston closes the exhaust port B and opens t e air inlet ort A in the chamber s, drawing ,air into this. chamber, across the face of the valve 1' and into the combustion chamber of the engine. At a predetermined point, after the commencement of this outstroke the in 'n. strikes the end of the arm Z and rocks t e rod h against the action of thev spring m. This rocking of the rod It causes t e shoulderon' the end of that rod to lift the collar 1) against the action of the spring 0 and oil flows between the outer surface of the collarbf and'the inner surface of the tubular opening through the-ducts 2 into the recess a," valve stem 0 onto the face of the valve r. This rocking of the rod h by the pin n is secured at the roper moment by means of the shar pro- JBClZlOIl on the cam d. At approximate y the end of the out-stroke of the piston, this sharp projection rides from under the roller e on end of the arm f and arm 1' on the rock shaft is raised, seating the valve?" but owing to the construction of the parts the oil feed is sto ped by the disengagement of the'pin n wit the arm 1 before the closing of the valve 1', thus allowin the air to continue to swee over the face 0 this valve after the oil feed as sto ed. This interval of time may be regulaterllfl screwing in and out the pin n. After the closure, of the valve 1* at the end of the out-stroke, the next in-stroke of the iston begins, and compresses the gases in t e combustion chamber. mately the end of the in-stroke ignition is secured in any appropriate way and the piston is forced outwardly, the valve 1" remaining closed. At the beginning of the next instroke the valve 1 is o ened. by the cam d, thus com leting thecyc e of operations.

It will e seen that with this construction of the oil feed 'mechanism when the pin a is lifted from the arm Z and the rod h is rocked %y the spring m into the position shown in ig. 1, the collar 1) is abruptly seated b the At approxi- Y s ring 0 on the beveled shoulder o .the

s eeve :10, thereby forcibly expelling the oil which has accumulated between these surfaces and suddenly stopping the flow of oil. In other words, the collar b acts as a plunger in the oil chamber above the ducts z and at the conclusion of the oil feed it forcibly exin fiat ets through the ducts z against thestem my enever the ducts'are open. By the construction' shown this pressure acts againstthe. collar b to hold it firmly closed. The

pressure may be obtained by elevating-the 011 tank (3; as shown or in-any other suitableis obvious that the improvements may be from the spirit ofr'ny invention.

embodied in other forms without departing WhatIclaimis:-

1. In an, internal combustion engine, a valve having a vaporizing surface, a stem on said valve, an oil chamber surrounding said stem, a partition between the chamber 'and the stem, a cpluralit of ducts throughsaid partition an space about said stem, and a valve in the oilchamber controlling said ducts, whereby when the valve is open oil flows from the chamber throughthe ducts and down the stem onto the vaporizing surface. v

2. In an internal combustion engine, a valve having a vaporizing surface, a stem on said valve, a series of ports about said stem,

a distribution chamber communicating with said ports, an oil chamber, an eduction port in sald chamber, an oil duct leading from said ort to the distribution chamber, a plunger 1n the oil chamber adapted to close the eduction port, means for withdrawing the lunger to open the port, and means for fee ing oil into the chamber between the plunger and v the eduction port when the plunger 18 withdrawn. i

3. In an internal combustion engine, a valve having a vaporizing surface, a stem onsaid valve, a series of ports about said stem, a distribution chamber communicating with said ports, an oil chamber, an eduction port in said chamber, an oil duct leading from said port to the distribution chamber, means for feeding oil through the oil chamber whilethe ed'uction ort is open, and means for abruptly forcing t e oil in the chamber through the eduction port and closing said port' to shut off the oil feed. I

4. In an internal combustion engine a valve havinga vaporizing surface, a stem on said valve, an oil chamber surrounding said stem, a partition between the chamber and the stem, a lurality of ducts through said partition an spaced about said stem, a plunger in the oil chamber ada ted to close the ducts, a spring for moving t e plun er into a position to close the ducts, a cam or lifting the plunger against the action of the spring, and means for operating said can 5. In an internal combustion engine, a

valve having a va orizing surface, a stem on said valve, ports a out said stem, a distribution chamber communicating with said ports,

an oil chamber communicating with the distribution chamben'means for supplying oil j tosaid oilichamber under pressure, a plunger in said" Dil chamber, means 3 for-raising said plunger to open communication between the oil and distribution chambers against the pressure of the oil, and means forde ressing the plunger to force the oil in the oil c amber onto the surface of thevalve and close the communication between the oil anddistribution chambers.

6. In an internal combustion engine, a

ing said stem andhaving an enlarged end with a beveled surface, 'a casing s'ecuredto the enlarged end of the sleeve, whereby a chamber is formed betweenthe sleeve and easing, a collarsurrounding said sleeve between the sleeve and casin and having 'a beveled end adapted-tent the'beve'led surface of the sleeve, a spring for pressing the end of the collar against said surface, a cam engaging with thecollar, means for rockingthe cam to lift the collaragainst the action of the spring, oil ducts through the beveled surface on the sleeve leadin to the valve stem and means for feedin oi into the chamber between the sleeve an casing.

7. In an internal combustion engine, a valve, a stem on said valve, a sleeve surrounding said stem, a casing surrounding said sleeve, an oil chamber between the sleeve and easing, means for feeding oil to the oil chamber, an oil passage from the oil chamber to the valve surface, and a valvein the oil chamber for controlling said passage.

8. In an internal combustion engine, a

valve, a stem on said valve, a sleeve sur-' rounding said stem, a casing surroundin said sleeve, an oil chamber between the s eeve and easing, means for feeding oil to said chamber, an oil passage from the chamber to the valve surface, a collar surrounding the.

sleeve and movable thereonin said chamber,

and means for reciprocating said collar to open and close the oil passage.

9. In an internal combustion engine, a

valve, a stem on said valve, a sleeve surrounding said stem, a casing surrounding said sleeve, an oil chamber between the seeve and easing, means for feeding oil to said chamber, an oil passage from the hamber to the valve surface a collar surrq l'ndingthe sleeve and movabie thereon in sald'chamber, and means, for reciprocating said collar to open and close the oil passage, said means valve, a stem on said valve, a sleeve surroundcomprising a shaft, a cam on said shaft engagin with the collar andmeans for rocking said s aft.

10. In an internalicombustion engine, a valve, a stem on said valve, a sleeve surrounding said stem, a casing surrounding said sleeve, an oil chamber between the sleeve and easing, means for feeding oil to said chamber, an oil passage from the chamher to the valve s uface, a collar surrounding the sleeve andmovable thereon insaid'chamber,a spring acting on said collar to hold it in a posltion to close the oil passage, a shaft, a cam carried bysaid shaft and engaging said collar,means for moving the valve stem to open the valve and means for turning the cam shaft to lift the collar against the action ofthe spring and open the Oll passage, while the valve is open. I

11.- In an internal combustion engine, a

valve. a stern-on said valve, a sleeve surthe-sleeve and movable thereon in said chamher, a springacting on said collar to hold it v in a-position to close the oil passage, a shaft,

a cam carried by said shaft and engaging said collar, a rocker to which the valve stem-is connected, a rod connected to the rocker,

sleeve, an oil chamber between the means for moving the rod to actuate the rocker, a rock arm carried by the cam shaft, and a stop on the rod adapted to e e the rock arm to turn'the camshaft collar against the action'of the spring.

12. In an internal combustion engine a valve having a vaporizing surface across which theair entering the combustion cham ber passes, a stem onsaid valve, an oil chamthe her, a series of ducts leading from the oil chamber to the stem and arr ed about said. stem, a series of ducts in sai stem, means for feeding oil through the first mentioned ducts and down the ducts in-the stem, andmeansfor deflecting the oilfrom'the ducts in the stem onto the valve surface. In testimony whereof I afiix my signa-- ture in presence of two witnesses. V

' FRANCIS W. BRADY.

"Witnesses: I

BURGESS" A. CRUDEY, WILLIAM H. DAVIS.

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