SE177605C1

SE177605C1 -

Info

Publication number: SE177605C1
Authority: SE
Publication date: 1961-01-01

Description

Uppfinnare: R Stoffel Prioritet begard frail den 14 apri1 1956 (Schweiz) Foreliggande uppfinning ayser ett forfaringssatt for drift av en flercylindrig tvAtaktsmotor med styrda inloppsoppningar pa de cylindrar, som tillforas medelst minst en av en avgasturbin driven kompressor komprimerad spot- och laddningsluft genom fran en gemensam fordelningsledning avgrenade, enskilda .forbindningsledningar, till var och en av vilka ar ansluten en sidokammare, vars volym andras periodiskt i det tillhorande arbetsrummets arbetstakt, varjamte mellan fordelningsledningen och de enskilda forhindningsledningarna är anbragt minst en anordning, som uppsalter ett mindre motstand mot stromningen fran kompressorn till cylindern an mot en rnotsatt riktad stromning. Inventor: R Stoffel Priority Required April 14, 1956 (Switzerland) The present invention provides a method for operating a multi-cylinder two-stroke engine with controlled inlet openings on the cylinders which are supplied by at least one compressor driven by an exhaust turbine compressed spot air and through a discharge air. common distribution line branched, individual connecting lines, to each of which a side chamber is connected, the volume of which is periodically changed in the rate of operation of the associated work space, and between the distribution line and the individual obstacle lines at least one device is arranged which salts a smaller resistance to the flow. the compressor to the cylinder against a reversed directional flow.

Foreliggande uppfinning avser dessutom en for sattets utforande avsedd anordning. The present invention further relates to a device intended for the design of the kit.

Tvataktscylindern saknar sasom kant ifyrtaktscylinderns formaga till insugning pa egen hand och att .darfor sjalv reglera den luftvolym, som skall tillforas rdensamma fran den avgasturhindrivna kompressorn under ett av denna sistnamnda beroende tryck, .och dessutom kraver tvataktscylindern i allmanhet ett visst luftoverskott for sin spolning och darfOr vid samma laddningstryck i allmanhet storre effekt pa avgasturbinen On fyrtaktscylindern. The two-stroke cylinder, like the edge of the four-stroke cylinder, lacks the ability to draw on its own and therefore to regulate the volume of air to be supplied by the exhaust-driven compressor under one of the latter dependent pressures, and in addition the two-stroke cylinder generally requires a spool cylinder. therefore, at the same charge pressure, generally greater effect on the exhaust turbine On the four-stroke cylinder.

Till avhjalpande av de harigenom for tvataktsinotorn uppkommande svarigheterna har man redan foreslagit, att inte lata den avgasturbindrivna kompressorn arbeta .fritt, utan lillfora den extra energi, och da speciellt att driva densamma frail forbranningsmotorn eller att i serie med densamma forkoppla eller efterkoppla en kolvkompressor, som Or hopkopplad med forbranningsmotorn eller drivs pa annat salt, eller att koppla en sadan kolvkompressor parallellt med den turbindrivna kompressorn. In order to remedy the similarities arising from the two-stroke engine, it has already been proposed not to allow the exhaust gas turbine compressor to operate freely, but to inject the extra energy, and in particular to drive the same internal combustion engine or to couple or reconnect a reciprocating compressor in series with it. as Or coupled to the internal combustion engine or driven on other salt, or to connect such a reciprocating compressor in parallel with the turbine-driven compressor.

Dessa atgarder komma ,emellertid att kern plicera maskinens konstruktion och betjanande och att Oka dess forlus ter. These actions will, however, further complicate the design and operation of the machine and increase its losses.

Vid .de har avsedda forbranningsmotorerna Or del emellertid oundgangligen nodvandigt att vidtaga speciella atgarder for att stalla spol- och laddningsluft i beredskap, ntimligen for igangsattning och vid drift med liten be- lastning, eftersom den avgasturbindrivna kompressorn dO, pa grund av att avgasen saknas hell eller arum innehaller en alltfor liten energimangd, inte har tillracklig effekt for att kunna avgiva den ,erforderliga luftmangden till arbetscylindern. At the intended combustion engines Or part, however, it is inevitably necessary to take special measures to put flushing and charging air in readiness, timely for start-up and in operation with low load, since the exhaust gas turbine compressor dO, due to the exhaust gas lacking or arum contains an excessively small amount of energy, does not have a sufficient effect to be able to deliver the required amount of air to the working cylinder.

Vid dot inledningsvis omtalade slaget av forbranningsmotorer har ,denna kanda uppgift Hosts darigenom, att till varje forbindningsledning Or ansluten en sidokammare, vars yolym andras periodiskt i del tillhorande arbetsrummets arbetstakt. Mellan forbindnings- och .fordelningsledningarna Or darvid anbragt en anordning, som uppsatter ett rnindre motstand mot stromningen fran kompressorn till cylinder On mot en motsatt riktad stromning. In the case of the initially mentioned type of internal combustion engine, this well-known task is hosted by the fact that a side chamber is connected to each connecting line, the yolym of which is periodically changed in part to the working rate of the working room. Arranged between the connecting and distributing lines is a device which sets up a lower resistance to the flow from the compressor to cylinder On to an opposite directional flow.

Denna anordning utgor alltsa ,ett hjalpmedel fOr •att vid igangsattningen avensorn vid fOrbfanningsmotorns drift inom lagre effektomraden under utnyttjande ay svangningar tillfora en tillracklig mangd spol- och laddningsluft till cylindern. This device thus constitutes an aid for supplying a sufficient amount of purge and charging air to the cylinder during the start-up of the vent during the operation of the preforming engine within the lower power ranges while utilizing the oscillations.

Det arbete som erfordras for -volymandringarna for den flercylindriga forbranningsmotarns enskilda sidokamrar, kommer nu att bliva overflodigt Mom de inigre effektomradena, namligen sa snarl som den avgasturbindrivna kompressorns luftavgivning blir kraftigare. The work required for the volume changes for the individual side chambers of the multi-cylinder internal combustion engine will now be superfluous in the internal power ranges, namely as soon as the exhaust gas emission of the exhaust gas turbine compressor becomes stronger.

Foreliggande uppfinning gar ut gran insikten om att dessa genom sidokamrarnas volymandringar vid hogre varvtal uppkommande forluster maste undgas, varigenom erhalles en joke obetydlig bransleinbesparing per hastkrafttimme yid samma nyttiggjorda effekt. 2— — Uppfinningen bestar i, att motslandet melIan .f5rdelningsledningen och forbindelseled- ningen minskas stegvis eller kontinuerligt med tilltagande belastning och/eller varvtal hos forbranningsmotorn i och for minskning av motstandets inverkan ph sidokammaren samt Ras stegvis eller kontinuerligt vid avtagande belastning och/eller varvtal. The present invention is based on the realization that these losses resulting from the volume changes of the side chambers at higher speeds must be avoided, thereby obtaining a joke insignificant fuel savings per hour of power with the same utilized effect. The invention consists in that the opposition between the distribution line and the connecting line is reduced stepwise or continuously with increasing load and / or speed of the internal combustion engine in order to reduce the effect of the resistance on the side chamber and Ras stepwise or continuously with decreasing load and / or speed .

Ddrvid kan man gâ sä tillvaga, att man periodiskt forandrar varaktigheten av motsthndsanordningens verkan med arbetskolvens slag. In this case, care can be taken to periodically change the duration of the action of the resistance device with the stroke of the working piston.

Det kan emellertid dven vara lampligt, att man till tiden forskjuter varaktigheten av motstandsanordningens verkan i forhallande till arbetskolvens slag. However, it may also be appropriate to postpone the duration of the action of the resistance device in relation to the type of working piston.

Slutligen kan man. gh sh tillvaga, att man tidvis slar ifran motstandsanordningens verkan. Finally you can. gh sh tillvaga, that one occasionally strikes from the effect of the resistance device.

Genom de beskrivna atgarderna uppnas pa enkelt salt, att effektforhrukningen genom si- dokamrarnas -volymandring minskas sd. mycket, att forbrdnningsmotorns nyttiggjorda effekt darigenom Okas i motsvarande utstrackning utan merforbrukning av bronsle. Through the described measures, it is achieved in simple salt that the power consumption is reduced by the volume change of the side chambers. much, that the utilized power of the internal combustion engine thereby Okas to a corresponding extent without additional consumption of bronze.

En annan fordel besthr i, att genom uppfinningen icke endast en till- eller frhnslag- ning tillâtes, utan att varje grad av minsk- ning av arbetet for sidokamrarnas volymd.ndring mellan dessa hada granser kan installas. Another advantage is that by means of the invention not only a switching on or off is permitted, but that any degree of reduction of the work for the volume change of the side chambers between these two boundaries can be installed.

I och for variation av tillstrypningsanordningens verkan i beroende av ett av forbran- ningsmotorns .driftvarden kan man utnyttja exempelvis forbra.nningsmotorns varvtal, turbin-kompressorenhetens varvtal, trycket yid kompressorns utlopp, en avgastemperatur eller bransleinstdllningsanordningens install-fling. In order to vary the action of the throttling device in dependence on one of the operating values of the internal combustion engine, it is possible to use, for example, the engine of the internal combustion engine, the speed of the turbine compressor unit, the pressure at the compressor outlet, an exhaust temperature or the installation of the fuel setting device.

Emellertid kunna 5.ven andra driftvarden utnyttjas for motstandsanordningens install- fling, sasom en temperatur, t. ex. ph kylvaltnet, ett tryck, t. ex. pagasen i avgassamlaren, ett vridmoment eller ett varvtalsutslag. However, 5. other operating values can also be used for the installation of the resistance device, such as a temperature, e.g. ph cooling roller, a pressure, e.g. the gas in the exhaust manifold, a torque or a speed range.

En anordning fear .det omtalade .forfaringssattets utfOrande dr exempelvis sO. utford, att i vagen frail fordelningsledningen till inloppsoppningarna aro anbragta dels en anordning, som uppsatter ett mindre motstand, mot stromningen fran kompressorn till cylitdern On mot en motsatt riktad stromning, och dels en anordning, medelst vilken verkan av den forstnamnda anordningens rnotstand kan forandras. A device for the performance of the aforementioned procedure, for example sO. challenge, that in the carriage from the distribution line to the inlet openings a device is arranged, which sets up a smaller resistance, against the flow from the compressor to the cylinder On against an opposite directional flow, and partly a device, by means of which the effect of the former device can change.

Sasom motstandsanordning i uppfinningens mening är att anse varje anordning, som pa mekanisk eller stromningsteknisk vag salter emot ett mycket stOrre motstand mot en stromning, som genomgar .densamma i en rikt- ning, an mot en stromning i motsatt riktning. As a resistance device within the meaning of the invention, it is to be considered that any device which, on a mechanical or flow-technical level, salts against a much greater resistance to a flow which passes through it in one direction, than to a flow in the opposite direction.

Vid en lamplig utforingsform av anordningen kan denna besta av en motstandsanordning. som hr anbragt ph ett mellan forbindningsledningen °eh f5rdelningsledningen anordnat organ, vilket i sin tur kan oppnas eller stangas atminstone delvis eller atminstone tidvis under ett arbetskolvslag. In a suitable embodiment of the device, this may consist of a resistance device. which is arranged on a member arranged between the connecting line and the distribution line, which in turn can be opened or closed at least partially or at least occasionally during a working piston stroke.

Anordningen kan liven vara sadan, att mellan forbindningsledningen och fordelningsledningen Or anbragt en motstandsanordningen Overbyggande forbiledning med en forhiledningsventil. F5r en. och samma motstandsanordning kan man liven anordna flera forbiledningar med forbiledningsventiler, som slas till och ifran stegvis. The device may be such that between the connecting line and the distribution line Or is placed a resistance device Overbuilding bypass with a bypass valve. F5r en. and the same resistance device, one can arrange several bypasses with bypass valves, which are switched on and off step by step.

Det kan aven Tara lampligt, att utforma motsthndsanordningen som en backventil och att p0. denna anhringa en anordning, t. ex. en sparr for ventilskaftet, som vid sitt paverkan-de forhindrar ventilens stangning atminstone delvis eller alminstone tidvis under ett arbetskolvslag. It can also be convenient to design the resistance device as a non-return valve and to p0. this attach a device, e.g. a ratchet for the valve stem, which in its action prevents the valve from closing at least partially or at least occasionally during a working piston stroke.

Vidare dr en anordning ldmplig, med vars hj alp backventilens stangning fordrojs. Furthermore, a device is suitable, with the aid of which the closing of the non-return valve is delayed.

En sadan anordning kan exempelvis arbeta efter samma princip som en stoldampare, varvid ventilskaftet gar frit vid oppnandet men daremot bromsas hydrauliskt eller pneumatiskt vid stangandet. Darigenom kan backventilen med sin stangningsrorelse 'folja kolvens slag vid lagre varvtal, medan backventilens stangande, pa grand av denna anordnings med kvadraten ph varvtalet tilltagande bromskraft, fordrojs mer och mer for att slutligen forhindras helt, varigenom den vid tilltagande motorvarvtal gradvis minskar ventilens verkan som motstandsorgan, intill .dess att denna verkan helt upphor. Such a device can, for example, operate according to the same principle as a chair steamer, the valve stem moving freely when it is reached, but instead braking hydraulically or pneumatically when closing. As a result, the non-return valve with its closing movement can follow the stroke of the piston at lower speeds, while the closing of the non-return valve, due to this device with the square ph speed increasing, is delayed more and more to be completely prevented, thereby gradually decreasing the valve resistance means, until .that this effect ceases altogether.

Uppfinningen forklaras Mirmare i det 101- jande i samband med beskrivningen av sex pa den bifogade ritningen i fig. 1-6 schematiskt askadliggjorda utforingsformer av anordningen for utforande av sattet enligt uppfinningen. The invention is explained in more detail below in connection with the description of six embodiments of the device for carrying out the set according to the invention schematically illustrated in the accompanying drawing in Figs. 1-6.

Fig. 1 visar en tvalaktsdieselmotor med en arbetskolv 1, som ror sig i en cylinder 2 .och dhrvid styr inloppsportarna 3 och utloppsportarna 4. Fig. 1 shows a two-stroke diesel engine with a working piston 1, which moves in a cylinder 2, and thereby controls the inlet ports 3 and the outlet ports 4.

Avgaserna, som ledas iva.g genom avgasledningen 5, .driva avgasturbinen 6, vilken driver kompressorn 7. Den av kompressorn angivna luften kyls medelst kylaren 8 och strommar genom lednina0en 9 in i fordelningsledningen och Iran denna in i forbindningsledningen 11 samt genom cylinderns 2 spolportar 3. The exhaust gases, which are led iva.g through the exhaust line 5, drive the exhaust turbine 6, which drives the compressor 7. The air specified by the compressor is cooled by means of the cooler 8 and flows through the line 9 into the distribution line and Iran this into the connecting line 11 and through the cylinder 2 coil ports 3.

Till forbindningsledningen 11 Or ansluten sidokammaren 12, Tars volym andrar sig periodiskt i arbetsrummets takt pA grund av kolvundersidans 13 rorelse. To the connecting line 11 Or connected the side chamber 12, Tars volume changes periodically at the rate of the working space due to the movement of the piston underside 13.

Mellen fordelningsledningen iG och varje forbindningsledning 11 Ar anordnad minst en motstandsanordning 14 — i fig. 1 visad som en backventil — och en annan anordning 15, 16, 17 for franslagning av motstandsanordningens verkan. Arranged between the distribution line iG and each connecting line 11 Ar is at least one resistance device 14 - shown in Fig. 1 as a non-return valve - and another device 15, 16, 17 for disengaging the action of the resistance device.

Denna a.ndra anordning bestar av en -vid punkten 16 lagrad havarm 17, medelst vilken den i mellanvaggen 18 anordnade backventilen. 14 kan oppna.s resp. hallas Oppen, exem- — ---3 pelvis for hand medelst handtaget 15, sa att motstandsanordningens verkan ,darmed kan forandras tidvis. This second device consists of a sea arm 17 stored at the point 16, by means of which the non-return valve arranged in the intermediate wall 18. 14 can be achieved resp. hallas Oppen, exem- - --- 3 pelvis by hand by means of the handle 15, so that the effect of the resistance device can thus be changed from time to time.

Forbranningsmotorns avlastning fran arhetet if Or sidokammarens volymandring Tappnas ,darigenom, att en inbordes tryckuljam.- ning och volymutjamning mellan de enskilda sidokamrarna genom den gemensamma fordelningsledningen 1.0 dilates vid bortfall ,av motstandsanordningarnas verkan, sa att sidokamrarnas volymandring armed praktiskt taget inte langre erfordrar nagot arbete. The relief of the combustion engine from the unit in Or the side chamber's volume change is lost, in that an inboard pressure equalization and volume equalization between the individual side chambers through the common distribution line 1.0 is dilated in case of failure, by the effect of the resistance devices, so that the side chambers .

Ett annat utforande enligt uppfinningen visas i fig. 2. Harvid ar motstandsanordningen utformad som ett backstromstryporgan 19 och anbragt pa ett organ 20, som Or svangbart lagrat i leden 21. Genom svangning kring le-den 21 oppnas organet 20 och .ddrmed kopplas ba&stromstryporganet 19 tillfalligt bort fran vagen mellan fordelningsledningen 10 och cylinderns icke visade inloppsportar. I den visade anordningen Or organet 20 forsett med en havarm 22, som Or verksamt fOrbunden med forbranningsmotorns varvtalsregulator 23. Denna anordning fungerar sa, aft organet 20 Or stangt, nar forbranningsmotorn star ski-la eller .drivs med lagt vandal, varigenom backstromstryporganet 19 Or fullt verksamt. Med tilltagande varvtal astadkommer varytalsreu6ulatorn 23 en gradvis oppning av organet 20, varvid backstromstryporganets 19 verkan ,forandras i samma utstrackning och Oven-s5. gradvis. Another embodiment according to the invention is shown in Fig. 2. In this case the resistance device is designed as a reverse current throttling member 19 and arranged on a member 20 which is pivotally mounted in the hinge 21. By pivoting about the hinge 21 the member 20 is opened and the rear throttling member 19 is thereby connected. temporarily removed from the carriage between the distribution line 10 and the inlet ports (not shown) of the cylinder. In the device shown, the means 20 is provided with a lever arm 22, which is operatively connected to the speed regulator 23 of the internal combustion engine. This device operates so that the means 20 is switched off when the internal combustion engine is running or driven with a vandal, whereby the reverse current throttling means fully operational. With increasing speed, the speed regulator 23 provides a gradual opening of the means 20, whereby the action of the reverse current throttling means 19 changes to the same extent as Ovens-s5. gradually.

Fig. 3 visar en liknande anordning med den skillnaden, att .organet 20 är utformat som en kring axeln 24 svangbar klaff, vilken dr forsedd med tva sasom backventiler 14 forma-de motstandsanordningar. En av trycket i fordelningsledningen 10 paverkbar kolv 25 Or anordnad att paverka organet 20 over elf haystangssystem 26 pa ,det .sattet, att organet 20 oppnar sig vid tilltagande tryck, medan det forbliver stangt, sd lange inget ails oiler ett ,endast ringa tryck fOreligger i ledningen 10. Fig. 3 shows a similar device with the difference that the member 20 is designed as a flap pivotable about the shaft 24, which is provided with two resistance devices formed as non-return valves 14. A piston 25 which can be actuated by the pressure in the distribution line 10 is arranged to actuate the means 20 over eleven shackle bar systems 26, provided that the means 20 opens at increasing pressure, while it remains closed, as long as there is no other oil, only small pressure is present. in line 10.

Annu ett utforande enligt fOreliggande uppfinning visas i fig. 4. Another embodiment according to the present invention is shown in Fig. 4.

Motstandsanordningen 14, t. ex. en backventil 14, Or anbragi pa ett sasom en slid utformat organ 20, som kan forskjutas at sidan och frilagga vagen mellan fordelningsledningen 10 och cylinderns icke visade inloppsportar. Over .armen 28 st5der sig organet 20 i sidled pa sin ena sida mot en tillsammans med fOrbranningsmotorns icke visade vevaxe' roterande kamaxel 27, varvid en fjader 29 sorjer for armens 28 kraftoverforande anliggning mot kamaxeln 27. Pa sin andra sida Or organet 20 forsett med en ,dragarm 30, som Over ett havstangssystem 31 Or verksamt for- bunden med manoverkolven 25, vilken i sin tur, liksom vid anordningen enligt fig. 3, pa.- verkas av lufttrycket i ledningen 10 och vid tilltagande tryek Astadkommer organets 20 oppna:nde..Organets 20 samverkan med kam- axeln 27 har till foljd, att en med arbetskolyens slag periodisk andring av motstandsanordningens verkan intrader genom .organets. med kolvslaget periodiskt ,forsiggaende forskjutning at sidan. The resistance device 14, e.g. a non-return valve 14, Or mounted on a member 20 shaped like a slide, which can be displaced to the side and expose the path between the distribution line 10 and the inlet ports (not shown) of the cylinder. Above the arm 28, the member 20 abuts laterally on its one side against a rotating camshaft 27, not shown together with the combustion engine, with a spring 29 providing the force-transmitting abutment of the arm 28 against the camshaft 27. On its other side, the member 20 is provided with an, traction arm 30, which over an ocean rod system 31 is operatively connected to the maneuvering piston 25, which in turn, as with the device according to Fig. 3, is affected by the air pressure in the conduit 10 and with increasing pressure ensures the opening of the member 20: The interaction of the member 20 with the camshaft 27 has the consequence that a periodic change of the action of the resistance device with the action of the working coil enters through the member. with the piston stroke periodically, proceeding displacement at the side.

Om anordningen utformas sa, att kamaxela Or gradvis fOrskjutbar mot och fran organets 20 arm 28 kan ,darmed motstandsanordningens verkan .forandras periodiskt med arbetskolyens slag och gradvis. If the device is designed so that the camshaft Or is gradually displaceable towards and away from the arm 28 of the member 20, the action of the resistance device can thus change periodically with the stroke of the work coil and gradually.

Elf annat utforande enligt upplinningen visas i fig. 5. Vid .denna anordning Or mot- standsanordningen utformad som ett back- stromstryporgan, liksom enligt fig. 2. En detta stryporgan fOrbigaende forbiledning 32 Or forsedd med ett avstangningsorgan 33 i form av en ventilklaff 33. Donna ventilklaff kan Andras sa. till sin stallning, exempelvis Over en anordningen enligt fig. 3 ,och 4 liknan- de regleranordning och medelst en av laddningsluftens tryck .piiverkad kolv 25, att den vid stillastaende och lagre varvtal avstEngda forbiledningen 32 oppnas gradvis och Or belt oppen t. ex. vid forbranningsmotorns markvarvtal, sd att motst5.ndsanordningens verkan cla Or helt .franslagen. Eleven other embodiments according to the winding are shown in Fig. 5. In this device the resistance device is designed as a back-current throttling means, as in Fig. 2. This throttling means is bypassed 32 or provided with a shut-off means 33 in the form of a valve flap 33. Donna valve valve can Andras said. to its position, for example Over a device according to Fig. 3, and 4 similar control device and by means of a piston 25 actuated by the pressure of the charge air, that the bypass 32 closed at standstill and lower speed is gradually opened and Or belt open e.g. at the ground speed of the internal combustion engine, so that the effect of the resistance device cla Or completely .franslagen.

Samma effekt uppnas Oven med en anordning enligt fig. 6, varvid motstandsanordning- en Or utformad som en backventil 11, vars skaft 39 Or forsett med en pneumatisk broms 34. Derma fungerar sa, att bromskolven Mater skaftet 39 att ga uppat praktiskt ta- get obehindrat, dO luften fritt kan stramma efter in i hromscylindern 36 genom ventilklaf- fen 37. Vid ventilskaftets 39 forskjutning n.ed- at stangs emellertid ventilklaffen 37 och bromskolven 35 maste pressa ut den i cylin- dern 36 insugna luften genom strypoppningen 38. Darvid utsattes ventilens 14 forskjutning nedat for en fordrojning genom pneumatisk bromsning, vars storlek Or varvtalsberoende, sd att den into blir markbar, ndr ventilen arbetar langsa:mt, men daremot vid snabbare arbete helt eller delvis forhindrar ventilens stangande. The same effect is achieved above with a device according to Fig. 6, the resistance device Or being designed as a non-return valve 11, the shaft 39 of which is provided with a pneumatic brake 34. This works so that the brake piston feeds the shaft 39 to give up the practical train unhindered, the air can freely flow into the chrome cylinder 36 through the valve flap 37. However, when the valve stem 39 is displaced, the valve flap 37 is closed and the brake piston 35 must squeeze out the air sucked into the cylinder 36 through the choke opening 38. the displacement of the valve 14 downwards was subjected to a displacement by pneumatic braking, the size of which depends on the speed, so that it becomes noticeable when the valve works slowly, but in the case of faster work completely or partially prevents the valve from closing.

Utom de heskrivna anordningarna Oro ett stort antal andra utforingsformer tankbara inom Tamen for uppfinningstanken. In addition to the devices described above, a large number of other embodiments are conceivable within the scope of the inventive concept.

Claims

Patent claim:

Procedure for the operation of a multi-cylinder two-stroke engine with controlled inlet openings on the cylinders which are supplied by means of at least one compressor driven by an exhaust turbine compressed purge and charge air by means of individual connecting lines branched from a common distribution line. connected to a side chamber, the volume of which is periodically alternated at the rate of operation of the associated working space, and between the distribution line and the individual connecting lines is arranged at least one device which places a lesser resistance to the flow from the compressor to the cylinder to an opposite flow. from the fact that the resistance of the Indian distribution line and the connecting line are reduced stepwise or continuously with increasing load and / or speed of the internal combustion engine 1 or to reduce the effect of the resistance on the side chamber and increase stepwise or continuously with decreasing load and / or speed.

2. Set enlist patent claim 1, can be characterized by the fact that the duration of the action of the resistance device changes periodically with the stroke of the working piston.

3. The patent claim 1, which is characterized by the fact that the accuracy of the action of the resistance device is time-shifted in relation to the stroke of the working piston.

4. Set according to patent claim 1, characterized in that the action of the resistance device is occasionally switched off.

5. Claimed in claim 1, characterized in that the action of the resistance device changes depending on the vandal of the internal combustion engine.

Salt according to patent claim 1, characterized in that the effect of the resistance device changes depending on the speed of the exhaust turbine compressor unit.

7. A patent claim 1, characterized in that the action of the resistance device changes depending on the pressure in the compressor outlet.

Claimed in claim 1, it may be claimed that the action of the resistance device changes depending on the exhaust gas temperature.

9. Claimed in claim 1, may be characterized by the fact that the effect of the resistance device changes depending on the installation of the branch installation device.

10. Device for carrying out the method specified in any of the patent claims 1-9, characterized in that in the carriage the distribution line (10) to the inlet openings (3) is arranged partly a device (14, 19), which sets up a minor resistance to the flow frail the compressor (7) to the cylinder (2) against an oppositely directed flow, and partly a device (15-18, 20-24, 24--26, 27-31, 32-33, 34-38), by means of which effect of the resistance of the first-mentioned device can be changed.

Device according to claim 10, characterized in that the resistance device (14, 19) is arranged on a member (17, 18, 20) arranged between the connecting line (11) and the distribution line (10), which can be opened or closed at least, partially.

Device according to claim 10, characterized in that a bridging bypass (32) with a bypass valve is arranged between the distribution line (10) and the connecting line (11) with a bypass valve.

Device according to claim 10, characterized in that the resistance device consists of a non-return valve (14) and is provided with a device (34-39) which prevents the valve (14) from closing at least in part.

14. Device according to claim 10, characterized in that the device (34--39) is challenged to move the tangent of the valve (11). Request Publications: U.S. Patent No. 2,779,155.