US883688A - Gas-engine. - Google Patents

Description

Nm 883,688. PATENTED APR. 7, 1908. @EN HEERY BBRH a JOHN HAYS BRGIL GAS ENG'JNB. ANIMATION ULM) 0012.4.1907.

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'UNITED STA-Tas PATENT OFFICE.

JOHN HENRY BIRCH AND JOHN HAYSy BIRCH, OF CRAWFORDSVILLE, INDIANA f GAS-ENGIN E.

Specification of Letters Patent.

No. 883,688. i

Patented april 7, loos.

lApplication filed October 4l, 1907. Serial No. 395,886.

To all whom 'it may concern:

Be it known that we, JOHN HENRY BIRCH and JOHN HAYs BIRCH, citizens of the United States, residing at Crawfordsville, in the county of `ontgomery and State of Indiana,

. have invented certaln new and useful Imshaft 14. Leading into the end held closed by a spring 19. i outer end of the stem of valve 18 is a piston rovements in Gas-Engines, of which the ollowin is a specification.

The o ject of our invention is to produce an exhaust `valve mechanism for internal combustion engines of suchv character that the exhaust valve will be intermittently voperated by the pressure within the cylinder and .will be held open b that pressure until automatically released. y a properlytimed mechanically operated valve.

The accompanying drawings illustrate our invention: Flgure 1 1s a vertical section of an engine embodying ourr invention; Fig. 2 a similar sectionof the cylinder and associated parts at right angles to the section Fig. 1; and F' 3 a plan with the ca a removed.v

l In t e drawings, 10 in icates. a power `cylinder and 11 a power piston mounted t erein, said piston being connected by a pitvman 12 with a crank 13 carried by the crank o'f thecylinder 10 is an inlet passage 15 the innorfend'of which is controlled by a puppet inlet valve 16. Leading from the same end of cylinder 10 is an exhaust passage 17'c1osed by an in wardly opening exhaust valve 18 normally Secured to the 20 which fits within the cylindrical pistonvalve chamber 21 formed in the head 22 which closes the end ofcylinder 10. Head 22 has formed in it the inlet and exhaust passages and also carries the `valve 16 as well as the valve 18 and said head 22 is preferably open at its outer end to facilitate the forma tion of the water chamber .25, the cylinder 21, the bore for the stem of valve 16, and the various otherA assages which will be'hereinafter described? The open end of head 22 is closed by an easil removable cap 26, the

openmgs 25 exten -ng axially through it in order to communicate with' the water space,

tends diagonally through head 22'and communicates at 4its lower end with a pipe'30 which extends downwardly through the water jacket 28, and communicates at its lower end with a passfge 31 which, in turn,` communicates with the chamber` 32 formed in a casting 33, secured to the side wall of cylinder 10. Formed at one side ofchamber 32 is a valve seat-34 in .which is iitted a check valve 35, normally held in its seatby spring 35, the valve seat leading to a-passage 36 which communicates with the passage 37. The passage37 passes through the wall of cylinder 10 into said cylinder at :the end of t e power stroke of piston 11. Leading from passage 36 is a passage 38 which communicates with a passage v39formed through the wall` of cylinder 1() beyond the passage .37

passage 37 is opened into the cylinder'lO.

For the purpose of mechanically `operating valve 35, we provide a reciprocating in 41 which, at one end, lengages the stem o valve 35, so as to drive it in one direction against the action of spring 35 and, for convenience and economy of construction,'` at its Aother. end carries the plunger 42 of `a pump 13. Pin 41- is connected by a link 44 with the strap 45 of an eccentric 46 secured to and rotated with the crank shaft 14. a v

The operation is as V follows: With the parts in the positions shown in Figs. 1 and 2, the first down stroke of piston 11 draws in a charge through the inlet passage 15 past valve 16, the spring of said valve being 'weaker .than spring 19 so that the exhaust valve does not move. On the return up stroke the charge, which has just been drawn in, will be compressed and then ignited. The next down stroke of the piston vis therefore a power stroke, and when the end of the power stroke is reached a portionof the pressure within the cylinder will pass through `passage 37 past valve 35, said Valve opening un er the pressure, and throu h passages 31, 30 and 29 'into the outer end o inder 21, so as to act upon the force exhaust v alve 18 inward from its seat so as to open the exhaustv passage `17.` The the valve cylpiston 20. and

pressure in the chamber 21 is allowed to esclose theexhaust valve 18.

exhaust'valve is'thus held' open during the next return stroke of the piston sov that the exhaust gases are driven out from the cylinder. Just as the power iston reaches the u per end of its stroke o return following ower stroke, eccentric 46 operates to mec anically open valve 35, whereupon the cape ,through passages 38: and 39 i'nto the crank base 40'so ,as to permitsprin 19 to It will e seen by the above that the piston is not depended small and easi upon to close the ports to 'maintain the pressure against the exhaust valve operating piston utt'hat, insteadf the pressure against said valve-pi'stom being once admitted by the movement of the power-piston, is held by covering of passage 37 by the power piston, on this stroke, there will be no pressure, be@

yond atmospheric, in cylinder 10, and consequently there will be no .opening of valve 35 and no pressure passing into thevouter end of chamber 21.-

We claim as our invention 4 1. In an internal combustion engine, the combination, with a ower cylinder and istongtherein, of an exhaust valve controlling an exhaust passage -leading from said cylinand t e power tion der, yieldin means for normally holding said exhaust va vevclosed, a cooperating valvepiston and cylinderfor said exhaust valve, a passa ebeig'fpr'ovidedbetween said cylinder cylinder to vadmit pressure to the valve cylin' er atf the end of the power stroke of the-power-piston, a valve in said passa e arranged to retain pressures within `the v ve cylinder, and a means controlled.

mentioned valve.

2.'.In an internal combustion engine, the combination, with the power cylinder and the ypower piston, of an exhaust .valveconby .the power-plston for operating said last- V trolling an exhaust assage leadin from said cylinder, a spring or normally `c osing said valve'a valve-piston] and cylinder for actuatimg said exhaust valve in opposition to said springiwith a passage forming' a communica- .etween saidv valve cy inder 'and the power cylinder, the said" passage being controlledgat itsp'ow'er-cylinder end by the ower piston, a checjkvvalve arran ed in said ast mentioned passa e to contro eduction fromlthe valve cylin er, there being also a passage communicatin with said checklvalve-pwssage-beyond t e check valve relaceases i tive tothe. exhaustfvalve cylinder and controlled at its vother end by the power-piston, and means forintermittently opening vsaid check-valve. v

3. In an internal combustion engine, the combination, with Athe power cylinder' and the power'piston, of an exhaust valve c0114 trolling 'an exhaust assage leading from said cylinder, a spring fior normall c osi i 'said valve, a valve-piston'and cylin er for actuele' ing said'exhaust valve in opposition to said sprin with a' passage formingl'a communica tion etweenl said valve cy `nder and the power cylinder, the said passage being Acontrolled at its power-cylinder end by the ower piston, a check valve arranged in said ast mentioned passage to contro eduction.

from the valve cylinder, there being also a,y passage communicating with said check-y valve passage beyond the check-valve rela-y tive to the exhaust-valve c linder and controlled at its other end by t e power-piston, a sprin for normally holding said checkvalve c osed, and means for intermittently opening said check-valve.

' 4. In an internal combustion engine, the combination, with the power cylinder and the power piston, of an exhaust valve controlllng an exhaust assage leadin from 4said cylinder, aspring` or normallyc osing said valve, a valyefpiston and cylinder for actuating said exhaust valve in opposition to said spring, with a passa e forming a communicatlonbetween said va ve cylinder and the ower cylinder, the said passage being contro ed 'at its power-cylinder end by the ower piston, a check'valve arran ed in said Vast mentioned passage to contro eduction from the valve cylinder, there being also a Ipassage communicating with said check-valve passage beyond the check-valve relative to the eX-R haustvalve cylinder and controlled at its other end by the power-piston, and amechanical connectionbetween said check valve and the power piston for intermittently opening said check valve.

5. In an internal combustion engine, the vlic combination, with the power cylinder and the power piston, of an exhaust valve ccntrollin an 'exhaust assage leading from said cylinder, aspring or normallyc osing said valve, a valve-piston and cylinder for actuat ing said exhaust valve in opposition to said sprin with a passage formin a communication etween said valve cy inder and the power cylinder, the said passagtc trolled at its power-cylinder end y the power piston,` a check-valve arran ed 1n said last mentioned passage to contro eduction from the valve cylinder, there being also a passage communicatin with said check-valve passage beyond t e check-valve relative to the exhaust-valve cylinder and controlled at its being con l other end by the power-piston, a, sping for ana, 'this 28th daypf Sep'tembfer;v A1. one normally holding said check-valve closed, thousand nine hundred and seven. f'

`and a mechanical connection between said JOHN-HENRYBIRCH. [Lisi y checkwalve and the power iston for 'inter- JOHN HAYSJVBIRCH` [1..311 5 mttently opening said chec -valve .l `Witnesses: l In Witnesswhereo, we have hereunto set WILLIAM T. WnrrfiINGToN,

oul` hands' and seals at Crawfordsville, Indl- LOUISE MQPHEETERS. f

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