DK167499B1 - SAVING AIR ENGINE ARRANGEMENTS - Google Patents
SAVING AIR ENGINE ARRANGEMENTS Download PDFInfo
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- DK167499B1 DK167499B1 DK126191A DK126191A DK167499B1 DK 167499 B1 DK167499 B1 DK 167499B1 DK 126191 A DK126191 A DK 126191A DK 126191 A DK126191 A DK 126191A DK 167499 B1 DK167499 B1 DK 167499B1
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- air
- chamber
- valve
- locking
- pressure
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
- F01L1/462—Valve return spring arrangements
- F01L1/465—Pneumatic arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/08—Valves guides; Sealing of valve stem, e.g. sealing by lubricant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
- F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
- Fluid-Damping Devices (AREA)
- Safety Valves (AREA)
- Exhaust Gas After Treatment (AREA)
Description
DK 167499 B1 iDK 167499 B1 i
Opfindelsen angår et spærreluftarrangement ved en forbrændingsmotor, som har et med motorens arbejds-cylinder forbundet ventilhus for en udstødsventil, hvis ventilspindel er lejret i ventilhuset og forløber op i 5 en på ventilhuset monteret luftfjeder omfattende et luftfjederkammer og et luftfjederstempel, der er fast forbundet med ventilspindlen og kan påvirke udstødsventilen i lukkeretningen, og hvor et i en hydraulikcylinder lejret aktuatorstempel kan påvirke udstødsventilen 10 i åbneretningen, og hvor ventilspindlen i området over lej ringen i ventilhuset passerer gennem et spærreluft-kammer med en tilgangsåbning for tilledning af spærreluft.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a combustion engine arrangement of an internal combustion engine having an exhaust valve housing housing connected to the engine, the valve stem of which is mounted in the valve housing and extending into an air spring mounted on the valve housing comprising an air spring chamber and an air spring piston connected to it. the valve stem and can affect the exhaust valve in the closing direction, and where an actuator piston stored in a hydraulic cylinder can influence the exhaust valve 10 in the opening direction, and where the valve stem in the area above the bearing in the valve housing passes through a locking air chamber with an inlet opening for supplying a locking air.
Når aktuatorstemplet ved afslutningen af moto-15 rens forbrændingsslag påvirker udstødsventilen til åbning, vil forbrændingsgassernes udstrømning gennem udstødskanalen i ventilhuset frembringe et kraftigt trykstød i kanalen, og derefter vil trykket heri falde ned mod omgivelsernes tryk, indtil ventilen lukker igen.When the actuator piston at the end of the engine's combustion stroke affects the exhaust valve to open, the combustion gases outflow through the exhaust duct into the valve body produces a strong pressure shock in the duct, and then the pressure herein drops to ambient pressure until the valve closes again.
20 Udstødsventilens spindel går op gennem og er lejret i et styr i ventilhuset med en vis klaring i forhold til styret. Når ventilen åbner, vil det kraftige trykstød og også det efterfølgende forholdsvis høje tryk i kanalen søge at tvinge udstødsgas op i klaringen mellem 25 ventilspindlen og ventilstyret, hvilket medfører, at der på spindlens glide- eller lejringsflade kan afsættes forbrændingsrester i form af slaggepartikler og kondensat, og da ventilspindlens temperatur falder op gennem styret, kan den i udstødsgassen indeholdte 30 svovlsyre kondensere på spindlen og styret, hvilket kan nedsætte spindlens levetid som følge af korrosiv og abrasiv nedbrydning af spindel- og styroverfladerne.20 The exhaust valve spindle goes up through and is mounted in a handle in the valve body with some clearance relative to the handle. When the valve opens, the high pressure shock and also the subsequent relatively high pressure in the duct will try to force exhaust gas into the clearance between the valve spindle and the valve guide, which means that residual combustion residues in the form of slag particles and condensate can be deposited on the spindle. and as the valve spindle temperature drops through the guide, the 30 sulfuric acid contained in the exhaust gas can condense on the spindle and guide, which can reduce the life of the spindle due to corrosive and abrasive degradation of the spindle and guide surfaces.
Det er kendt at begrænse udstødsgassens indtrængning i klaringen mellem styret og spindlen ved at 35 tryksætte det oven over styret beliggende spærreluft-.kammer. Udstødsgassen indeholder små partikler af va- DK 167499 Bl 2 rierende størrelse, og driftserfaringer viser, at trods den resulterende nedovergående spærreluftstrømning vil nogle af disse partikler bevæge sig op gennem klaringen, hjulpet af den trykpulsation, som opstår i det 5 øjeblik udstødsventilen åbner, idet trykpulsationen momentant giver en opovergående luftstrømning i klaringen. Derudover vil visse partikelstørrelser blive transporteret op gennem klaringen ad mekanisk vej trods den nedovergående luftstrømning i klaringen. Spærre-10 lufttilførslen til spærreluftkammeret blæser ventilskaftet rent for disse partikler, og det er ved driftserfaringer konstateret, at partiklerne vil lejre sig i spærreluftkammeret på læsiden af ventilskaftet. Udover at begrænse udstødsgassernes indtrængning i klaringen 15 har spærreluftkammeret dermed også den væsentlige funktion at virke som fælde for de opad transporterede partikler, der således hindres i at trænge op i og erodere den omkring spindlen beliggende pakning ved luftfjederens bund.It is known to limit the penetration of the exhaust gas into the clearance between the guide and the spindle by pressurizing the closed air chamber located above the controlled. The exhaust gas contains small particles of varying size, and operating experience shows that despite the resulting downward blocking air flow, some of these particles will move up through the clearing, aided by the pressure pulse that occurs in the 5 minute exhaust valve open, the pressure pulsation momentarily produces an upward air flow in the clearance. In addition, certain particle sizes will be transported up through the clearing by mechanical means despite the downward flow of air in the clearing. The block-10 air supply to the lock-up chamber blows the valve shaft clean of these particles, and it has been found in operational experience that the particles will settle in the lock-up chamber on the side of the valve shaft. In addition to limiting the penetration of the exhaust gases into the clearance 15, the barrier air chamber thus also has the essential function of acting as a trap for the upwardly transported particles, which is thus prevented from penetrating and eroding the gasket located at the bottom of the air spring.
20 Fra USA patent nr. 3 120 221 kendes en forbræn dingsmotor med en knastakselaktiveret udstødsventil med pneumatisk tilbageføring. I denne motor har ventilhuset ikke noget spærreluf tkammer, og hvis der anvendes en pakning omkring ventilskaftet, kan denne slides af de . 25 partikler, der trænger op i klaringen mellem ventilskaftet og styret. Lækageluft fra luftfjederen kan på ukontrollabel vis trænge ned i klaringen og bidrage til køling af ventilspindlen.20 From United States Patent No. 3,120,221, an internal combustion engine with a camshaft actuated exhaust valve with pneumatic return is known. In this engine, the valve body has no locking chamber, and if a gasket is used around the valve stem, it can be worn by them. 25 particles that penetrate the clearance between the valve stem and the guide. Leakage air from the air spring can uncontrollably penetrate the clearance and contribute to cooling of the valve stem.
I de kendte motorer udtages spærreluften sæd-30 vanligvis fra motorens skylleluftreceiver, men dette medfører, at der i spærreluftkamret afsættes sodholdig olie. For at hindre dette tilføres spærreluftkamret i en anden kendt motor gennem en trykreduktionsstation forkomprimeret arbejdsluft ved et overtryk, som er ca.In the known engines, the shut-off air is usually taken out of the rinsing air receiver of the engine, but this causes the soot-containing oil to be deposited in the shut-off chamber. To prevent this, the locking chamber in another known engine is supplied through a pressure reduction station pre-compressed working air at an overpressure which is approx.
35 0,2 bar højere end .motorens aktuelle skyllelufttryk, hvilket ved alle motorbelastninger har . reduceret ud- DK 167499 B1 3 stødsgassens indtrængning i den nævnte klaring til et forholdsvis acceptabelt niveau.35 0.2 bar higher than the current rinsing air pressure of the engine, which has at all engine loads. reduced exhaust gas penetration into said clearance to a relatively acceptable level.
Det er et fællestræk ved de kendte spærreluft-arrangementer, at motorcylindrene har et fælles udven-5 digt rørsystem, som leder spærreluften til hver motorcylinders spærreluftkammer. Rent bortset fra at det er omkostningskrævende at fremstille et sådant rørsystem, har det også et meget stort volumen i forhold til spærreluf tkamrets volumen, hvilket betyder, at indtrængning 10 af udstødsgas i spærreluftkamret ikke fører til mærkbar trykstigning i rørsystemet. Det kan endvidere være et problem ved de kendte arrangementer, at motorens skyl-lelufttryk falder kraftigt ved lavere motorbelastninger, hvilket bevirker, at spærrelufttrykket ikke er 15 tilstrækkelig højt ved disse belastninger.It is a common feature of the known locking air arrangements that the motor cylinders have a common exterior pipe system which conducts the locking air to each locking chamber of the engine cylinder. Although it is costly to manufacture such a piping system, it also has a very large volume in relation to the volume of the shut-off chamber, which means that penetration 10 of the exhaust gas into the lock-up chamber does not lead to a noticeable increase in pressure in the pipe system. Furthermore, it may be a problem in the known arrangements that the rinsing air pressure of the motor drops sharply at lower engine loads, which causes the blocking air pressure to not be sufficiently high at these loads.
Hensigten med opfindelsen er at forenkle udformningen af spærreluftarrangementet og at forbedre dets evne til at sikre problemløs drift af udstøds ventilen.The object of the invention is to simplify the design of the shut-off air arrangement and to improve its ability to ensure trouble-free operation of the exhaust valve.
Med henblik herpå er arrangementet ifølge opfin-20 delsen ejendommeligt ved, at spærreluftkamrets tilgangåbning står i forbindelse med en luftstrømningspassage, som fører til luftfj ederkamret og indeholder et afspærrings- eller trykreguleringsorgan, der er indrettet til at åbne for tilledning af spærreluft fra luf tfj ederkam-25 ret, når trykket heri overstiger en forudbestemt værdi.To this end, the arrangement according to the invention is peculiar in that the inlet opening of the detent air chamber is in communication with an air flow passage leading to the air spring chamber and includes a shut-off or pressure control means adapted to open the supply air detent air from the air spring chamber. 25 when the pressure herein exceeds a predetermined value.
Ved at udtage spærreluften fra det til udstødsventilen hørende luftfjederkammer opnås, at trykket i spærreluftkamret stiger til et passende højt niveau svarende til maksimaltrykket i luftfjederkamret, når 30 der er behov for spærreluften, nemlig hver gang ventilen åbner og trykket i udstødskanalen stiger. Spærrelufttrykket kan indstilles til at være væsentlig højere end motorens skyllelufttryk, uden at spærreluftforbruget øges væsentligt i forhold til forbruget i de kendte 35 motorer, fordi spærreluften ikke udtages, når udstødsventilen er lukket. Renholdelsen af klaringen mellem DK 167499 Bl 4 ventilspindlen og dennes styr er væsentlig forbedret som følge af det højere spærrelufttryk og det forhold, at spærrelufttrykket er uafhængigt af motorens belastningsgrad. Desuden kan det tidligere anvendte 5 fælles rørsystem helt udelades, hvilket endvidere forenkler motorens vedligehold, fordi rørsystemet ikke skal demonteres for at udstødsventilen kan afmonteres ved motoreftersyn.By extracting the shut-off air from the exhaust air chamber of the exhaust valve, it is achieved that the pressure in the shut-off chamber rises to a suitably high level corresponding to the maximum pressure in the air-spring chamber when the shut-off air is needed, namely each time the valve opens and the pressure in the exhaust duct increases. The shut-off air pressure can be set to be significantly higher than the rinsing air pressure of the engine, without significantly increasing the use of the shut-off air in relation to the known motors, because the shut-off air is not taken out when the exhaust valve is closed. The cleaning of the clearance between the DK 167499 B1 valve spindle and its handlebar has been significantly improved due to the higher locking air pressure and the fact that the locking air pressure is independent of the engine load rating. In addition, the previously used 5 common pipe system can be completely omitted, which further simplifies engine maintenance because the pipe system does not have to be dismantled in order for the exhaust valve to be removed by engine inspection.
Luftstrømningspassagen har væsentlig mindre in-10 dre volumen end det tidligere kendte rørsystem, hvilket indebærer den yderligere fordel, at spærreluftarrangementet har et så lille volumen, at en eventuel indtrængning af udstødsgas vil medføre en trykstigning i spærreluftkamret, som vil modvirke yderligere indtræng-15 ning af udstødsgas.The air flow passage has substantially less internal volume than the prior art piping system, which has the added advantage that the barrier air arrangement has such a small volume that any exhaust gas entry will cause a pressure rise in the barrier air chamber which will counteract further penetration. of exhaust gas.
Det er uundgåeligt, at en vis mængde olie fra hydraulikcylinderen vil passere forbi aktuatorstemplet og luftfjederstemplet og ende i bunden af luftfjederkamret. Denne olie kan i en foretrukken udførelsesform 20 for arrangementet ifølge opfindelsen, hvor luftstrømningspassagen udmunder ved bunden af luftfjederkamret, udnyttes til smøring af ventilskaftet, idet olien rives med spærreluften og føres ned i klaringen mellem ventilspindlen og styret. Udover at olien mindsker sliddet 25 på spindlen, opnås der den yderligere fordel, at luftfj ederkamret holdes rent for de olieansamlinger, som ved de kendte motorer kunne blive afblæst ud i maskinrummet som en generende olietåge, når luftfjederen blev punkteret ved serviceeftersyn.It is inevitable that a certain amount of oil from the hydraulic cylinder will pass past the actuator piston and air spring piston and end at the bottom of the air spring chamber. This oil in a preferred embodiment 20 of the arrangement according to the invention, in which the air flow passage opens at the bottom of the air spring chamber, can be utilized for lubricating the valve shaft as the oil is teared with the shut-off air and introduced into the clearance between the valve stem and the guide. In addition to the oil reducing wear 25 on the spindle, the additional advantage is obtained that the air spring chamber is kept clean of the oil accumulations which, by the known engines, could be blown out into the engine room as a nuisance oil mist when the air spring was punctured by service inspection.
30 Fordelen ved det ovennævnte fordelagtigt lille volumen af spærreluftarrangementet kan yderligere øges ved, at afspærringsorganet i luftstrømningspassagen hensigtsmæssigt ligger i umiddelbar nærhed af spærre-luftkamret, så at eventuelt indtrængende udstødsgas 35 kun skal komprimere luften i selve spærreluftkamret.The advantage of the above advantageously small volume of the barrier air arrangement can be further increased by the fact that the blocking means in the air flow passage is conveniently located in the immediate vicinity of the barrier air chamber, so that any penetrating exhaust gas 35 only has to compress the air in the barrier air chamber itself.
Spærreluftarrangementet ifølge opfindelsen kan også anvendes på allerede leverede motorer, hvor luft- DK 167499 B1 5 fjederen har en sikkerhedsventil, idet motoren ombygges ved en simpel modificering, hvor det eksisterende udvendige spærreluftrørsystem afmonteres under samtidig afblænding af spærreluftafgangen på skylleluftreceive-5 ren, og hvor sikkerhedsventilens luftafgang på hver motorcylinder forbindes gennem en udvendig rørledning med det tilhørende spærreluftkammers lufttilgang. Da sikkerhedsventilen inden motorens ombygning normalt er indstillet til kun at åbne ved unormalt høje luf tf j βίο dertryk, skal ventilens åbnetryk og det i løbet af en motorcyklus maksimale tryk i luftfjederkamret endvidere afpasses således efter hinanden, at der fra luftfjederkamret ledes spærreluft til spærreluftkamret under i det væsentlig hver motorcyklus.The interlocking arrangement according to the invention can also be applied to already supplied motors, where the air spring has a safety valve, the engine being rebuilt by a simple modification, whereby the existing external interlocking pipe system is removed during simultaneous blinding of the interlocking air to the purge air recess, where the air outlet of the safety valve on each engine cylinder is connected through an external pipeline to the air inlet of the associated locking chamber. Furthermore, since the safety valve before the engine rebuild is normally set to open only at abnormally high air or pressure pressure, the valve opening pressure and the maximum pressure in the air spring chamber must also be adjusted to one another in such a way that from the air spring chamber the lock air to the lock air chamber is adjusted. in essentially every motor cycle.
15 Da forbruget af spærreluft ved hver motorcyklus kun er ringe i sammenligning med luftfjederens volumen, er det muligt at nedregulere sikkerhedsventilens åbnetryk, indtil der netop leveres den nødvendige spærreluftmængde ved hver åbning af udstødsventilen. Hvis 20 selv en ringe mindskning af luftfjederens maksimaltryk er uønsket, kan trykket af fødeluften til luftfjederen sættes op som et alternativ eller supplement til nedsættelse af ventilens åbnetryk.15 Since the consumption of shut-off air at each engine cycle is only small in comparison with the volume of the air spring, it is possible to down-regulate the opening pressure of the safety valve until the required amount of shut-off air is delivered at each opening of the exhaust valve. If even a slight reduction in the maximum pressure of the air spring is undesirable, the pressure of the feed air to the air spring can be set up as an alternative or supplement to reduce the valve opening pressure.
Eksempler på udførelsesformer for opfindelsen 25 forklares herefter nærmere med henvisning til tegningen, hvor fig. 1 viser et aksialsnit efter linien I-I i fig. 2 gennem en hydraulisk aktiveret og pneumatisk tilbageført udstødsventil med et spærreluftarrangement 30 ifølge opfindelsen, fig. 2 et ovenfra set billede af udstødsventi- len, fig. 3 i udsnit et aksialsnit efter linien III-III i fig. 2 gennem udstødsventilen, 35 fig. 4 et aksialsnit gennem et øvre afsnit af en anden udførelsesform for en udstødsventil med et spærreluftarrangement ifølge opfindelsen, og 6Examples of embodiments of the invention 25 will now be explained in more detail with reference to the drawing, in which: FIG. 1 shows an axial section along line I-I of FIG. 2 through a hydraulically actuated and pneumatically recirculated exhaust valve with a blocking air arrangement 30 according to the invention; FIG. 2 is a plan view of the exhaust valve; FIG. 3 in section an axial section along line III-III in fig. 2 through the exhaust valve, FIG. 4 is an axial section through an upper section of another embodiment of an exhaust valve with a blocking air arrangement according to the invention; and 6
Ulv lb/439 b l fig. 5 i udsnit et billede svarende til fig. 4 af en tredje udførelsesform for spærreluftarrangemen-tet.Wolf lb / 439 b l fig. 5 is a sectional view similar to FIG. 4 of a third embodiment of the barrier air arrangement.
I de forskellige udførelsesformer benævnes ens-5 virkende dele af udstødsventilen med samme henvisningsnummer .In the various embodiments, similarly acting portions of the exhaust valve are referred to by the same reference numeral.
I fig. 1 ses et udstødsventilhus l, som er bestemt til montering på toppen af en motorcylinders ikke viste dæksel. Ventilhuset indeholder en udstødskanal 2 10 for bortledning af udstødsgas fra motorens forbrændingskammer. En udstødsventil 3 har en ventiltallerken 4 , som i den viste lukkede ventilstilling ligger an mod et ventilsæde 5 og afspærrer adgangen til udstødskanalen. Ventiltallerknen går opefter over i en 15 ventilspindel 6, som strækker sig op gennem den øvre del af ventilhuset l. Ventilspindlen 6 er lejret i en føringsbøsning 7, som er indsat i en boring gennem ventilhusets øvre del.In FIG. 1, there is shown an exhaust valve housing 1, which is intended for mounting on the top of a motor cylinder cover not shown. The valve housing contains an exhaust duct 20 for discharging exhaust gas from the engine's combustion chamber. An exhaust valve 3 has a valve plate 4 which, in the shown closed valve position, abuts against a valve seat 5 and blocks access to the exhaust duct. The valve plate goes upwardly into a valve stem 6 which extends up through the upper part of the valve housing 1. The valve stem 6 is mounted in a guide sleeve 7 which is inserted into a bore through the upper part of the valve housing.
Ovenpå ventilhuset 1 er der koaks ialt med bøs-20 ningen 7 monteret en luftfjeder 8 og en hydraulikcylinder 9. Et på toppen af ventilspindlen 6 lej ret aktuatorstempel 10 vil påvirke ventilen 3 med en nedadrettet åbnekraft, når der føres hydraulikvæske til hydraulikcylinderens arbejdskammer 11. Et luftfjeder-25 stempel 12 er på velkendt vis fastgjort på ventilspindlen 6, så at stemplet 12 ved ventilens åbning bevæges nedover sammen med spindlen 6, hvorved luften i et under stemplet 12 beliggende luftfjederkammer 13 komprimeres. Når udstødsventilen skal lukke, aflas-30 tes trykket i arbejdskamret 11, hvorefter luftfjederen 8 vil føre udstødsventilen tilbage til lukket stilling som følge af, at trykket i luftfjederkamret 13 påvirker stemplet 12 og dermed spindlen 6 med en opadvirkende lukkekraft. En i fig. 3 vist lufttil-35 gang med kontraventil 14 forsyner luftfjederkamret med den nødvendige luft ved et tryk, som er afpasset DK 167499 B1 7 efter den ønskede lukkekraft. En tværboring 15 udgår fra bunden af luftfjederkamret og fører til en trykindstillelig sikkerhedsventil 16. Luftfjederen er nedadtil ved spindlen 6's gennemføring tætnet ved hjælp af 5 en ringpakning 17, som omkredser spindlen 6.On top of the valve housing 1, coax throughout with the bushing 7 is mounted an air spring 8 and a hydraulic cylinder 9. An actuator piston 10 mounted on the top of the valve stem 6 will actuate the valve 3 with a downward opening force as hydraulic fluid is supplied to the hydraulic cylinder's working chamber 11. An air spring plunger 12 is known in a well-known manner on the valve stem 6, so that the piston 12 is moved downwardly along with the spindle 6 at the opening of the valve, thereby compressing the air in an air spring chamber 13 located below the plunger 12. When the exhaust valve is to close, the pressure in the working chamber 11 is relieved, after which the air spring 8 will return the exhaust valve to the closed position as the pressure in the air spring chamber 13 impacts the piston 12 and thus the spindle 6 with an upward closing force. One in FIG. 3 with check valve 14, the air spring chamber supplies the necessary air at a pressure which is adapted to the desired closing force. A transverse bore 15 exits from the bottom of the air spring chamber and leads to a pressure adjustable safety valve 16. The air spring is sealed downwardly at the passage of the spindle 6 by means of a ring gasket 17 which circumscribes the spindle 6.
Som ovenfor nævnt er der mellem spindlen 6 og bøsningen 7 en vis klaring, der eksempelvis kan være på 2/10 mm. For at modvirke udstødsgassens indtrængning opefter gennem klaringen er der umiddelbart over den 10 øvre flange af bøsningen 7 et spærreluftkammer 18, som er afgrænset i tværretningen af sidevæggen i en reces udformet i ventilhusets øvre ende og i aksial retningen af henholdsvis oversiden af bøsningen 7 og undersiden af luftfjederens hus. En tilgangsåbning 19 i 15 sidevæggen af kamret 18 står gennem en tværboring 20 i ventilhuset 1 i forbindelse med en rørstuds 21 for den ene ende af en rørledning 22, hvis anden ende er monteret på sikkerhedsventilen 16's luftafgang 23 (se fig. 2).As mentioned above, there is some clearance between the spindle 6 and the bushing 7 which can be, for example, 2/10 mm. In order to counteract the penetration of the exhaust gas upwardly through the clearance, immediately above the upper flange of the sleeve 7 is a blocking air chamber 18 which is bounded in the transverse direction of the side wall in a recess formed in the upper end of the valve housing and in the axial direction of the upper side of the sleeve 7 and the underside respectively. of the air spring housing. An inlet opening 19 in the side wall of chamber 18 passes through a transverse bore 20 in valve housing 1 in connection with a pipe nozzle 21 for one end of a pipeline 22, the other end of which is mounted on the air outlet 23 of the safety valve 16 (see Fig. 2).
20 Tværboringen 15, ventilen 16, rørledningen 22 og tværboringen 20 danner en luftstrømningspassage, som forbinder luftf j ederkamret med spærreluf tkamret. Sikkerhedsventilen 16's åbnetryk er indstillet således, at der føres luft fra luftfj ederkamret 13 til 25 spærreluftkamret 18, når udstødsventilen 3 står åben. Sikkerhedsventilen 16 kan eksempelvis være indstillet til at åbne for tilledning af spærreluft, når trykket i luftfjederkamret når op på 15 bar. Trykket i spærreluftkamret 18 bliver derved væsentlig højere end 30 trykket af udstødsgasserne i udstødskanalen 2, hvilket fører til, at spærreluften vil strømme ned gennem klaringen mellem spindlen 6 og bøsningen 7, hvorved ventilstyret holdes rent for forureninger fra udstødsgassen.The transverse bore 15, the valve 16, the conduit 22 and the transverse bore 20 form an air flow passage connecting the air spring chamber to the locking chamber. The opening pressure of the safety valve 16 is adjusted such that air is supplied from the air spring chamber 13 to the 25 air chamber 18 when the exhaust valve 3 is open. The safety valve 16 may, for example, be set to open for supply of shut-off air when the pressure in the air spring chamber reaches 15 bar. The pressure in the shut-off chamber 18 is thereby substantially higher than the pressure of the exhaust gases in the exhaust duct 2, which causes the shut-off air to flow down through the clearance between the spindle 6 and the bushing 7, thereby keeping the valve control free of pollutants from the exhaust gas.
35 I den i fig. 4 viste udførelsesform for udstøds ventilen er sikkerhedsventilen 16 monteret i en udbo-35 In the embodiment of FIG. 4, the safety valve 16 is mounted in an outlet valve.
LM\ I Ό Ι*+Ζ/Ζ> D ILM \ I Ό Ι * + Ζ / Ζ> D I
8 ring 24 i den nedre del af luftfjederen 8. Sikkerhedsventilens tilgangsåbning står gennem en ikke vist boring i forbindelse med bunden af luftfjederkamret 13, og sikkerhedsventilens afgang står i forbindelse 5 med en nedovergående kanal 25 i luftfjederhuset og ventilhuset 1, og denne kanal udmunder i en i ventilhuset beliggende tværgående kanal 26, som fører til spærreluftkamret. En kontraventil 27 er beliggende ved kanalen 2 6's udmunding i spærreluf tkamret. Denne 10 kontraventil hindrer luft fra spærreluftkamret i at trænge tilbage i kanalen 26. Kanalen 26 kan i radialt udadgående retning være afspærret af en langskaftet bolt 28, som er indskruet i et gevind i kanalen, så at boltens endeflade ligger umiddelbart uden for kanalen 15 25's udmunding i kanalen 26. Sikkerhedsventilen 16 er gennem en boring 36 og en fjederbelastet kontraventil 37 i denne boring forbundet med udstødsventilens oliedræn, der er beliggende uden for luf tfj ederkamret. Kontraventilen 37 er justeret til at åbne ved et tryk, 20 som ligger over luftfjederens normale arbejdstryk. Derved virker kontraventilen som en sikkerhedsventil, der åbner hvis luftstrømningspassagen 16, 25, 26 skulle blive blokeret af et fremmedlegeme.8 ring 24 in the lower part of the air spring 8. The access opening of the safety valve is through a bore not shown in connection with the bottom of the air spring chamber 13, and the exit of the safety valve is connected 5 with a downward passage 25 in the air spring housing and the valve housing 1, and this channel opens in a transverse duct 26 located in the valve housing which leads to the locking chamber. A non-return valve 27 is located at the outlet of the duct 26 in the locking chamber. This check valve prevents air from the locking air chamber from receding into the duct 26. The duct 26 can be blocked in a radially outward direction by a long shaft bolt 28 which is screwed into a thread in the duct so that the end surface of the bolt is immediately outside the duct 15 25 opening in the duct 26. The safety valve 16 is connected through a bore 36 and a spring-loaded check valve 37 in this bore to the oil drain of the exhaust valve located outside the air spring chamber. The check valve 37 is adjusted to open at a pressure 20 which is above the normal working pressure of the air spring. Thereby, the non-return valve acts as a safety valve that opens if the air flow passage 16, 25, 26 is to be blocked by a foreign body.
I en alternativ, ikke vist udførelsesform kan 25 kanalerne 25 og 26 i ventilhuset 1 i stedet udføres som en i ventilhusets overside beliggende, opad åben kanal, som strækker sig fra boringen 25 i luftfjederhuset til spærreluftkamret 18. Denne udførelsesform udmærker sig ved at være særdeles enkel at frem-30 stille.In an alternative embodiment, not shown, the ducts 25 and 26 in the valve housing 1 can instead be constructed as an upwardly open, open channel located in the valve housing extending from the bore 25 in the air spring housing to the locking chamber 18. This embodiment is characterized by being particularly simple to produce.
Fig. 5 anskueliggør en tredje udførelsesform for spærreluftarrangementet, hvor luftfjederens sikkerhedsventil ikke indgår som en del af arrangementet. En rundtgående olieopsamlingsrille 29 er udformet i bun-35 den af luftf jederkamret 13 for at lede nedsivende hydraulikolie til en kanal 30, som fra rillen strækker DK 167499 B1 9 sig nedefter og går over i ventilhuset 1, hvor den udmunder i en tværgående boring 31/ som gennem en forholdsvis lille kanal 32 står i forbindelse med spær-reluftkamret 18. Det inderste stykke af boringen 31 5 er udført med indvendigt gevind, hvori der er indskruet en bolt 33, som i udadgående retning afspærrer boringen 31. En vinkelbukket kanal 34 er således udformet i den indre ende af bolten 33, at den ene ende af kanalen ligger ud for og står i forbindelse med kanalen 10 30 i ventilhuset, og den anden ende af kanalen udmunder i boringen 31, som fører til spærreluftkamrets tilgangsåbning 19. Det inderste stykke af kanalen 34 er udført med større diameter og forsynet med indvendigt gevind, hvori der er indskruet en fjederbelastet kon-15 traventil 35, som åbner for tilførslen af spærreluft, når trykket i luftfjederkamret 13 når op på sin maksimalværdi. Luftstrømningspassagen mellem luftfjederkamret 13 og spærreluftkamret 18 omfatter kanalerne 30, 32 og 34.FIG. 5 illustrates a third embodiment of the locking air arrangement where the air spring safety valve is not included as part of the arrangement. An annular oil collecting groove 29 is formed in the bottom of the air spring chamber 13 to direct descending hydraulic oil to a duct 30 which extends from the groove downwards and enters the valve housing 1 where it opens into a transverse bore 31. / which communicates through a relatively small duct 32 with the locking air chamber 18. The inner part of the bore 31 5 is made with an internal thread, in which is screwed a bolt 33 which extends outwardly the bore 31. An angular duct 34 is formed at the inner end of the bolt 33 so that one end of the duct is facing and communicates with the duct 10 30 in the valve body and the other end of the duct opens in the bore 31 which leads to the inlet opening of the locking chamber 19. innermost portion of duct 34 is made of larger diameter and provided with internal thread, in which is screwed a spring-loaded convoy 35 which opens for the supply of locking air t when the pressure in the air spring chamber 13 reaches its maximum value. The air flow passage between the air spring chamber 13 and the barrier air chamber 18 comprises the ducts 30, 32 and 34.
20 Det er naturligvis muligt at begrænse forbruget af spærreluft ved at indsætte et drøvleorgan på et passende sted i en af de ovennævnte luftstrømningspassager. Da trykket i luf tfj ederkammeret 13 er væsentlig højere end udstødsgassernes tryk i udstødskanalen 2, 25 vil spærreluftarrangementet med en sådan drøvleindret-ning fungere tilfredsstillende. Drøvleorganet kan enten anvendes i kombination med kontraventilen 16 eller alene, hvis det ønskes, at luftfjederkamret altid skal stå i forbindelse med spærreluftkamret.It is, of course, possible to limit the consumption of barrier air by inserting a throttle member at a suitable location in one of the above air flow passages. Since the pressure in the air spring chamber 13 is substantially higher than the pressure of the exhaust gases in the exhaust duct 2, 25, the barrier air arrangement with such a throttle device will function satisfactorily. The throttle member can be used either in combination with the check valve 16 or alone if it is desired that the air spring chamber always be in communication with the locking air chamber.
30 Luftfjederens lufttilgang 14 kan levere luft ved et fødetryk på ca. 5,5-7 bar. Hvis der ønskes kontinuert spærreluftforsyning, kan afspærringsorganet i luftstrømningspassagen indstilles til at åbne ved et tryk på fra 4,0 til 5,5 bar. Når fødetrykket er på 5,5 35 bar vil spærreluftforbruget per cylinder i en motor med en stempeldiameter på 60 cm eksempelvis være 1 kg/timeThe air inlet 14 of the air spring can supply air at a feed pressure of approx. 5.5-7 bar. If continuous barrier air supply is desired, the shut-off means in the air flow passage can be set to open at a pressure of from 4.0 to 5.5 bar. When the feed pressure is 5.5 35 bar, the barrel air consumption per cylinder in a motor with a piston diameter of 60 cm will for example be 1 kg / hour
Claims (5)
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK126191A DK167499B1 (en) | 1991-06-27 | 1991-06-27 | SAVING AIR ENGINE ARRANGEMENTS |
| PT100609A PT100609A (en) | 1991-06-27 | 1992-06-19 | SEALING DEVICE BY AIR FOR SEALING THE BOLT BETWEEN AN EVACUATION VALVE SHAFT AND ITS GUIDE TO A VALVE HOUSING OF AN INTERNAL COMBUSTION ENGINE |
| GR920100276A GR1001229B (en) | 1991-06-27 | 1992-06-23 | A sealing air arrangement of an internal combustion engine. |
| DE4220689A DE4220689C2 (en) | 1991-06-27 | 1992-06-24 | Air purge system in an internal combustion engine |
| TR92/0605A TR26046A (en) | 1991-06-27 | 1992-06-26 | A SEALING AIR LAYOUT OF A COMBUSTION ENGINE. |
| KR1019920011221A KR100251393B1 (en) | 1991-06-27 | 1992-06-26 | Sealing device of combustor |
| JP4194728A JP2922367B2 (en) | 1991-06-27 | 1992-06-29 | Sealed air system for internal combustion engine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK126191 | 1991-06-27 | ||
| DK126191A DK167499B1 (en) | 1991-06-27 | 1991-06-27 | SAVING AIR ENGINE ARRANGEMENTS |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK126191D0 DK126191D0 (en) | 1991-06-27 |
| DK126191A DK126191A (en) | 1992-12-28 |
| DK167499B1 true DK167499B1 (en) | 1993-11-08 |
Family
ID=8102862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK126191A DK167499B1 (en) | 1991-06-27 | 1991-06-27 | SAVING AIR ENGINE ARRANGEMENTS |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JP2922367B2 (en) |
| KR (1) | KR100251393B1 (en) |
| DE (1) | DE4220689C2 (en) |
| DK (1) | DK167499B1 (en) |
| GR (1) | GR1001229B (en) |
| PT (1) | PT100609A (en) |
| TR (1) | TR26046A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5582141A (en) * | 1994-10-12 | 1996-12-10 | Eaton Corporation | Engine valve hydraulic actuator locating mechanism |
| DE10040114A1 (en) * | 2000-08-17 | 2002-02-28 | Bosch Gmbh Robert | Connection between a shaft end of a gas exchange valve of an internal combustion engine and an actuator of a valve actuator |
| DE10154339A1 (en) * | 2001-11-06 | 2003-05-15 | Volkswagen Ag | Actuator for a gas exchange lifting valve of an internal combustion engine comprises a control chamber having a first chamber connected to a hydraulic system and a second chamber |
| FR2867807B1 (en) * | 2004-03-17 | 2006-07-07 | Intertechnique Sa | DEVICE FOR RECALLING A VALVE AND MOTOR EQUIPPED WITH SUCH A DEVICE |
| DE102004027107A1 (en) | 2004-06-03 | 2005-12-29 | Man B&W Diesel A/S | Exhaust valve for two stroke engine especially diesel engine has the valve seal lubricated via an upper oil reservoir |
| WO2006108438A1 (en) * | 2005-04-14 | 2006-10-19 | Man B & W Diesel A/S | Exhaust valve assembly for a large two-stroke diesel engine |
| DE502005004913D1 (en) * | 2005-11-10 | 2008-09-11 | Man B & W Diesel As | TWO STROKE BIG DIESEL ENGINE |
| DE102008037746A1 (en) * | 2008-08-14 | 2010-02-18 | Märkisches Werk GmbH | ring seal |
| DE102011101259A1 (en) * | 2011-05-11 | 2012-11-15 | Krones Aktiengesellschaft | Apparatus and method for forming plastic preforms |
| CN105909334A (en) * | 2016-06-23 | 2016-08-31 | 上海中船三井造船柴油机有限公司 | Diesel engine vent valve with forced opening function |
| JP7397695B2 (en) * | 2020-01-30 | 2023-12-13 | 川崎重工業株式会社 | Determination device, ship-to-land communication system, and determination method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK225982A (en) * | 1981-07-07 | 1983-01-08 | Sulzer Ag | INHIBIT OR EXHAUST VALVE TO A CYLINDER TOP OF A COMBUSTION ENGINE |
| DE3149776C2 (en) * | 1981-12-16 | 1985-11-14 | Daimler-Benz Ag, 7000 Stuttgart | Valve guide arrangement for a poppet valve controlling the connection of a main exhaust line of an internal combustion engine with a secondary exhaust line |
| JPS62153510A (en) * | 1985-12-26 | 1987-07-08 | Mitsui Eng & Shipbuild Co Ltd | Air seal structure of exhaust-valve shaft supporting part for internal combustion engine |
| US4878464A (en) * | 1988-02-08 | 1989-11-07 | Magnavox Government And Industrial Electronics Company | Pneumatic bistable electronic valve actuator |
| JP2593352B2 (en) * | 1989-04-26 | 1997-03-26 | 本田技研工業株式会社 | Valve train for internal combustion engine |
-
1991
- 1991-06-27 DK DK126191A patent/DK167499B1/en not_active IP Right Cessation
-
1992
- 1992-06-19 PT PT100609A patent/PT100609A/en not_active Application Discontinuation
- 1992-06-23 GR GR920100276A patent/GR1001229B/en unknown
- 1992-06-24 DE DE4220689A patent/DE4220689C2/en not_active Expired - Fee Related
- 1992-06-26 TR TR92/0605A patent/TR26046A/en unknown
- 1992-06-26 KR KR1019920011221A patent/KR100251393B1/en not_active IP Right Cessation
- 1992-06-29 JP JP4194728A patent/JP2922367B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DK126191D0 (en) | 1991-06-27 |
| DK126191A (en) | 1992-12-28 |
| DE4220689A1 (en) | 1993-01-07 |
| GR1001229B (en) | 1993-06-30 |
| JPH05187210A (en) | 1993-07-27 |
| TR26046A (en) | 1993-11-01 |
| PT100609A (en) | 1994-12-30 |
| KR100251393B1 (en) | 2000-04-15 |
| DE4220689C2 (en) | 2003-06-26 |
| KR930000819A (en) | 1993-01-15 |
| JP2922367B2 (en) | 1999-07-19 |
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Legal Events
| Date | Code | Title | Description |
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| A0 | Application filed | ||
| B1 | Patent granted (law 1993) | ||
| PBP | Patent lapsed |
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