US1019488A

US1019488A - Valve for explosion-engines.

Info

Publication number: US1019488A
Application number: US56698310A
Authority: US
Inventors: Arthur Constantin Krebs
Original assignee: Anciens Etablissements Panhard et Levassor SA
Current assignee: Anciens Etablissements Panhard et Levassor SA
Priority date: 1910-06-15
Filing date: 1910-06-15
Publication date: 1912-03-05
Anticipated expiration: 1929-03-05

Description

A. o. KREBS. y VALVE FORYBXPLOSION ENGINES.

APPLICATION FILED JUNE l5, 1910.

l m 9488 -Patenteaman 5, 1,912.

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TRES ANCIENS ETABLSSEMENTS EANHARD t LEVASS/,- 0F PARS,

VALVE FR. EXLDSN-ENGINES.

Specication of Letters-Patent.

Patente@ implication filed .Tune 15, 1,910; Serial No. 526.9233.

all witom 'it concern:

l@ it known that L An'rnun Cons'nmim 'liningsa :i eitizen oii the Repuhie of Fi'snee,

esielent oi Pnt-is, France? have innew und useful linpiovements in for Expiosion-Engines, which im- -,nts site fully set forth in the 'follow- 'nciztion l invention is characterized `by the ooniie ni'iengenient of suction-:ind exliiuist of a -eylindei' of an explosion engine. ille said 'vulves heine controlled by a ouolenoting ievei ifeoeivii'xp; .its movement from a- 'e 1 is 'a veitiez-.l section through the invero ed ve lifes; 2 is a cross-section l n L ini/ing;u the paris in the position `wle-,ien they zissunie when the suction valve is open; Fig'. 2a is a detail View showing the 'pests in the ioosition which they assume when the suction valve is olosed. Fig. 3 shows a 'detail of s modification.

fin (l is the oylinclei" with its Water VLC 1 foi? cooling its "Valls, The openingr upper end oi"A 'the 4oylincler 1s closed hreeeli paint 2 heldin place 'oy' .means ine;q het nrisngeol in the usuel manner. The

v said. breech part is provided along its axis with s cylindrical orifice-in eommunieation with two superposed annular 'eeesses the bottoni iecess 3 being for exhaust, and the upper i'eoess 4 `for suction. ,These two re- Gosses communicate with the'exteiior respectively by ineens of exhaust orifice. 5 and suotion orifice Through the central opening of the breech part passes a valve 7 sliding with a rslight amount of friction in the oriiee in Question, the widened edges of the Suid vslve resting@` aga-inst the ground bottom .e of the hieeeh vwhioh constitutes tappen end of 'the cylinder 0.

The valve 7 is hollow throughout its length mul provided with s tliapi'xstgm S located shove the ennuis? suction cheniher 4. @pennies 9 povifled in the Wall of lthe valve, below the diaphragm 8, establish Communication with the suction opening". The upper end of the valve T kis closed by a. cap 10, against the outer edges oi which rests a. spring l1 restingon the othei* henri on the breecln Untie the action of 'the tension oit' the spring in question, the widened edges. of the vulve are held in Contact., vVith a certain sinount of pressure, with the ground surface Vofthe breech. 2 and thus mevent any communication between the Cylinder und the exhaust Conduit. The valve 'i7 is called. the exhaust valve. 'ifhiough this exhaust valve itself passes, slongits-exis the spindle .l2 ofthe suction veive. To that end, the diaphragm 8 is provided with s. hole pirovided with asleeve 13 forming' e. ,fluide 'for the spindle oi' the suction Valve. The widened `portion of the said vsve closes the eentrl orifice of the exhaust valve et the side of the cylinder, by resting" against the ground surface of the breech ns shown at 11iin. Fig. 1.

The snc-tion' valve is held against its seat hy a spring' 16 nesting 'on the diaphragm of.

the exhaust valve and .pressing against a, cross-hei" 17 of 'the spindle of 'the vsuction valve. The control oi the ssiflyalves is efeeteflhy means of 'the balance beam 18 mounted on e bracket 19 by means of s. spindle or' pin 2G about which it can. oseillate. rEheenl of the balones beam at the side of the vulves is bifnreated and passes above the cap l0 of the exhaust valve bove the enfle 21 .of the seid forli' oit the holsnee beam (Fig: 2i are srianfijol two small balance heinns 22 22 the plane of os-.

eillstion of which .is :it s night angle to 'that of the balance' benin i8. The pivot pins 23 ofthe said small balance beams 22 are seemed to the cap l() of the exhaust valve and the beams 22 have one end contacting with the upper surfaces of the ends 21 of the fork of the beam 18 and their other encls with the top of theV spindle of the suc' tion valve l2. Finally, the end of the losl-v u-nce beam 1S opposite the valves, is pivoted at' 24e (Fig. l) to a rofl 25 resting on a. com 26 by means of :t roller 27. A spring 2S resting :it 2 9 on the frame oi the motor, keeps the1-oller 27 always in Contact with fsa the cam. l'n order to obtain that result the spring 28 combined with the leverage of the balance' beam 18, must produce a greater momentum than that produced at the other 4 side of the same balance beam by the spring 16 of the suction valve and the small balance beams 22 22.

For describing the working of the device,

it will be assumed that the piston of the the

small balancebeams

22, 22 on their'

supports

23, 23 secured to the said valve. .At the end of the suctlon period, the cani 'brings the balance beam 18 back to its hori zontal or central position corresponding to the closing of the twolvalves. The two periods of compression and of combustion followed by expansion succeed eachother afterward, without any modification in the closed position of the valves. At the end of the expansion period, the cam, by raising the .rod 25, oscillates the balance beam 18 which, by ressing on the cap of the exhaust valve, orces the latter to open the opening of the exhaust 'conduit through which Vthe combustion gases can escape. The exhaust valve carries in its movement the suction valve which keeps the communication with the suction conduit cut ofi". At the end of the exhaustthe cam causes the rod 25 tov rise, to oscillate the balance beam 18 and to close the exhaust opening, before uncovering the suction opening, as already stated. .The opening and closing movements of the suction and exhaust ,valves take, therefore, place in the usual working conditions of a four-stroke explosion engine.

The arrangement shown in the drawings for working the valves by means of a single cam and a single rod, is given merely by way of example, for itis obvious that any other constructions fulfilling the sameconditions could be used, for instance the construction shown in Fig. 3. In this modified construction, the two small balance beams 22 22 are replaced by a single small balance beam 30 arranged in the same plane of oscillation as the balance beam 18. On the one hand, it rests with one of its ends on the spindle of the suction valve, and on the other hand, on a suitable boss provided on the balance beam 18. 'I he length of the lever arms or leverages are calculated so as to obtain the necessary travel.

Claim.

In an explosive engine, the combination with concentrically disposed intake andt exhaust valves having slidably associated stems, of a lever operating on one of the stems to move its valve to open position, and anotherlever mounted on said stem and e11- gaging the first mentioned lever and the stem of the other valve to transmit motion.

ARTHUR C ONSTANTlN KRERS.

Witnesses:

EMILE LEDRET, H. C. Coxn.