US990752A - Valve-gear of internal-combustion engines. - Google Patents

Description

F. W. LANCHESTBR.

VALVE GEAR OF INTERNAL COMBUSTION ENGINES. APPLICATION FILED JAN. 18, 1910.

990,752; Patented Apr. 25,1911" sauce-e Be it-- known that I, FREDERICK WILIQIAM Lano'nns'rrm'a subject of the King of Great Britain and Ireland, residing at553 Hagley road, Edgbaston, in the county of Warw ck, England, have invented certain new and use ful Improvements in the Valve-Gear of Intern'al-Oombnstion Engines, of which the i following is a com lete specification.

My invention ire ates to improvements in 1 the valve gear at internal combustion engines,'.and refers more particularly to improvements in the actuating gear and method of control of valves-of the sliding typeespecially applicable to engines em,- plelying the Otto cycle.

1e 1nvent1on "has for its object the appli-' cation" of a variable cut ofi to the intake of the working fluid in a simple andeifective manner.

The'invention consists in'm'eans for varying the valve operation in internal combustion engines having-valves of the 'concentric sliding sleeve type, byyarying the mean position and relative phase of operation of the inner sleeve.

The invention further consists in means 'for varying the valve-o eration' in such en-- gines, by giving the sha which reciprocates' the valve element translational and rotational movement.

The invention-furtherconsists in the proved valve gear for internal combust on engines-hereinafter described.

- n carrylng mymventlon into effect as applied to anengine of' known type, I

preferably arran e the inner and outer concentric sleeve va ves to be driven by inde-- endent lay shafts, and I mount the shaft yiwhich the inner sleeve is driven in a frame or otherwise, 'so that it maybe moved through 'a certain range, the said motion be-: at right angles to the axis of revolution.

The'motion is preferably arranged to take place concentrically to the gear by which the shaft, is driven, so'that the said ear remains'constantly in mesh, consequent y as the shaft is moved translati nally itat the same "time undergoes'a rota movement through a certain angle relative y to former posi tion, this rotary movement giving the necessary advance or reta'rdIto the inner sleeve I 'valve aforesaid. The diam eter of the earand thedirection of the motion imparte to .5

' 'parts, are so adjusted that the change of .tim-

the shaft and the positions of the various .im,..'mfi a; enemas sashm; VALVE-palm, br-mmnmxreonmsnqn Emirates??? V Speciiication of Letter- Patent Apr. v Application fil ed January 18,'19 10, "SeriaiNo. 538,629. 7

ing due' to the rotariyrdisplacement of the'i shaft is accom'panie' "by a cha-n ein the:

position of the point of mid stro QaOfnilllG valve, and thus the point of-cut-ofi' -may=beu6 0f varied and the timin of the exhaust released may be simultaneous y modified to ainyfdsired degree. 132 i. I The operation of the shaft movementmayr be accomplished by a rotary governor either directly or through a relay of some kind, or any other kind of overnor or hand COllU'Ol' may be employed for" the said purposefl 35*??? Referring to the-accompanying sheet'of drawings which show a vertical-section transverse 'to the crank shaft of anengine constructed accordingto this invention; A i is thecrank shaft,'B the connectingrod,-and C the cylinder of an internal combustion en gine working on the four, stroke cycle. Th e '3 inlet and exhaust portsJ and H respectively are controlled in the customary manner by an innersleeve D and an outer sleeveFg" The sleeves D and F are driven by the 'c'on necting rods E and G from two parallel cranked shafts L and K which are -causecl--'.

'to revolve at the same speed of revolution by an equal pair of gears O O; theshaft Kj is driven from the crank shaft by the usual two'to one motion shown as a chain drive' M N; the chain wheels are'lndicatedby their pit ch lines. T parallel shafts-Land K are mounted in a cylindrical container P which" is mounted revolubly apertures borediii" the walls of'the crank case inthe 1nann'er shown. A lever'Q is provided whereby thein such a manner that the duration of period 'durin "whichtheinner sleev p Q Tf a. are uncovere 1s var1ed,'the timing of menia position or dead center beingsubstantially unaffected, and secondly itrec'eives a rotary, motion due to the. eplcyclic. action gears,,whereby the timing of mean positi of the said perio'd is' also caused to 'vwi r-u The, variation of both" the duration oflthe period and the timing of the opening and ton reciprocatin cut-01f thus simultaneous, being effectedby the snnple movement of the one lever Q.

It'will be understood that when the'lever Q is set for full load, both sleeves function in the, usual-manner theexhaust release takes place about degrees'beforethe out-center and the feed cut-oil. takes place about 20 01*- 30 degrees after the subsequent out center. VVh'en the lever Q is set for running light,

the exhaust may conveniently be made to open :IPIOXlllltltQlY at the out-center and the fee cut-off is arranged to take place at 2.'In an internal combnstion cngine, in.

combination, a sleeve valve, a working piston reciprocating within said sleeve va ve, and means for simultaneously altering the stroke time relatively to said piston and displacing the point of mid travel of-said sleeve valve.

3. In an internal combustion engine, in combination, a working piston, two co-axial sleeve. valves surrounding said piston, and

means for altering the stroke time relatively to said piston of one of said sleeve valves.

4. In an internal combustion engine, in

combination, a working piston, two co-axial sleeve valves surrounding said piston, and means for displacingthe point of mid travel of one of said sleeve valves. 5. In an internal combustion engine, in combination, aworkin r piston, two co -axial sleeve valves surrounding said iston, and means for displacing the point 0 mid travel of the inner of said sleeve valves. 5

6. In an internal combustion engine, in combination, a working piston, two ce-axial sleeve valves surrounding said. piston, and

means for simultaneously alterirtg. the stroke time relatively to said piston an dis )laclng the point of mid travel of one of sai sleeve g the point of mid travc valves. I

7. In an internal combustion engine,. in

combinatimi, a working piston, two co-axial sleeve valves surrounding said piston, and

means for simultaneously altering the stroke time relatively to said iston and displacing i of the inner of. said sleeve valves. p

8. In an internal combustion engine, in combination, a sleeve valve, :1 working piston reciprocating within said sleeve valve, means for displacing the ,point of mid travel of said sleeve valve, said means including a 2 i J ced-752 shaft, 11 orankor eccentric carried on said shaft, means connecting saidicrank or eecentricto' said sleev'evalve, and means for moving said shaft. arallel' to itself,

'9. In an interns. combustion engine, in combination, a sleeve valve, a working piston' reciprocating within said sleeve val re,

means for simultaneously altering the stroke time relatively to said piston anilfllisplacing the point ,ofmid'travel of said sleeve tvalvc, said means including a shaft, :1. crank or eccentric carried on saidshaft, means-connecting said crank or eccentric tosaid sleeve valve, and means for moving said shaft parallel'toitself. 1 i 10.' In an internal combustionengine, in combination, a working piston, two co-axial sleeve valves surrounding said piston, means for displacing the oint of mid travel of one of said valves, Sillt means including a shaft, a crank or eccentriccarried on said shaft, means connectingsaid crank or eccentric to said sleeve valve, and means for moving said shaft parallel to itself. r a 11. In an internal combustion engine, in combination, a working-piston, two co-axial sleevevalves surround n said piston, means .for simultaneously altering-the stroke time to sa d piston and displacing the relativel point 0 mid travel of one of'said valves,

said means including a shaft, a crank on eccentric carried on said shaft, moans connecting said crank or eccentric to said sleeve valve, and means for moving said shaft parallel to itself. I

' 12. In an internal combustion engine, in

combination, a sleeve valve, a working )iston rcei )rocating'within said' sleeve vaivc,

means or reciprocating said valve, said means including'a shaft, an eccentric or crank carried by said shaft and connect-ed to said valve, and meansfor-altering the stroke time relatively to said piston ol said valve, said means including lxaarings carry- .ing. said shaft and revoluble about'a point eccentric to said shaft 13. In an internal combustion engine, in comb ation, asleeve valve, a working )iston rcciprmzating within said sleeve va vo, means for reciprocating said valve,- said means including a shaft, an eccentricoz crank carried by said'shaft and connected to said valve, and me'anstor disphuzinglhe point of mid travel of said-valve, said means including bearings carrylng said shaft andrevolublc about a point eccentric tosaid shaft.

14, In an internalcombustion engine, in combination, a sleeve valve, a working'pistoirrcci roeating within said sleeve valve, means or reciprmzati'ng said-valve, said means including a shaft, an eccentric or ,crank carried bysaid shaft and connected to said valve, and means for sinmltaneously altering the stroke tune relatively to said p revoluble about a combinatioin'a working piston, two co-axial sleeve valves surrounding said piston, means for rec:procat1n said valves, said means including two siafts, eccentrics or cranks 0 carried by said shafts and connected to said valves, -and means for altering the stroke time relatively to said piston of one of said valves, said means including hearings carrying the shaft connected to said valve and point eccentricto said shaft.

16. In an internal combustion engine, in combination, a working piston, two co-a-xial sleeve valves surrounding said piston, means for reciprocatin said valves, said means including two sliafts, eccentrics or cranks carried by said shafts and connected to said valves, and means for displacing the point of mid travel of one of said valves, said .means including bearings carrying the shaft connected to said valve and revoluble about a point eccentric to said shaft.

l7.'In an internal combustion engine, in combination, a working piston, two co-axial sleeve valves surrounding said piston, lllttltlhf .for reciprtwatin said valves, said means including two siiafts, eccentrics or crankscarried hy said shafts and connected to said -valves, and' means for sinniltaneousl Y altering the stroke time relatively to sait piston and displacing the point of mid travel of one of said valves, said means including bearings carrying the shaft connected to said valve and revoluble about a point 40 eccenti-'ic-to said shaft. 18. Inan internal combustion engine, in combination, a. working piston, two co-axial sleeve valves surrounding said piston, means for. reciprocatin rsaid valves, said means 46 including two s iafts, eccentrics or cranks carried by said shafts and connected to said valves, and means for alterin the stroke time relatively'to said piston 0 one of said valves, said means including bearings carryto ing the shaft connected to said valve and revoluble about the shaft connected to the otherof said valves. 7

19, In an internal combustion engine, in combination, a'working piston, two co-axial 65 sleeve valves surrounding said piston, means for reciprocatin said va ves, said means including .two sha ts, eccentrics or cranks car: ried by said shafts" and connected to said valves, and means for displacing the point efniid travel of 'oneof said valves, said means includin bearings carrying the shaft connected to said valve and revoluble about the shaft connected to the other of saidvalves. V 20. In an internal combustion-engine, in

combination, ree-r ngpistomtwo coaxialsleeve vaIves surrounding said piston, means for recijn'ocating said valves, said-means ineluding-two shafts, eccentrics or cranks carried by said shafts and co nected to said valves, and-means forsimuitaneousl altering the stroke time relatively to sai piston and displacing the point of mid travel of one of said valves, said means including bearings carrying the shaft connected to said valve and revoluble about the. shaft connected to the other of said valves.

21. In an internal combustion engine, in combination, a working piston, avo co-axial sleeve valves surrounding'iid piston, means for reciprocating said valves, said means including'two shafts, eccentrics or cranks carried by said shafts and connected to said valves, and means for altering the stroke.

time relatively to said piston of the inner ofsaid valves, said means including bear- .ings carrying the shaft conncrteii to said e valve and revoluble about. the shaft connected to the outer of said valves.

' 22. .In an internal combustion engine, in combination, a. working piston, two coaxial sleeve valves surrouiuling said piston, means for reciprocating said valves, said means including two shafts, eccentrics or cranks carried by said shafts and connected to said valves, and means for displacing the point of mid travel of the inner of said valves, said means including bearings carrying the shaft connected to said valve and revoluble about the shaft connected to the-outer of said valves. I

23. In an internal combustion engine, in combination, a working piston, two co-axial sleeve valves surrounding said piston, means for reciprocating said-valves, said means ineluding two shafts, eccentrics or cranks carried by said shafts and connected to said valves, and means for siniultaneousljy altering the stroke time relatively to sai piston and displacing the point of mid travel of the inner of said valves, said means including hearings carrying the shaft connected to said valve and revoluhle about the shaft con- HARRY DAVIS.

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