SE521751C2 - Method for recirculating part of exhaust gases from exhaust pipe of diesel engine to its inlet has at least one of dampers always maintained open and that other damper closed using drive motor common to dampers - Google Patents
Method for recirculating part of exhaust gases from exhaust pipe of diesel engine to its inlet has at least one of dampers always maintained open and that other damper closed using drive motor common to dampersInfo
- Publication number
- SE521751C2 SE521751C2 SE9803827A SE9803827A SE521751C2 SE 521751 C2 SE521751 C2 SE 521751C2 SE 9803827 A SE9803827 A SE 9803827A SE 9803827 A SE9803827 A SE 9803827A SE 521751 C2 SE521751 C2 SE 521751C2
- Authority
- SE
- Sweden
- Prior art keywords
- dampers
- exhaust gases
- engine
- inlet
- air
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/52—Systems for actuating EGR valves
- F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
- F02M26/54—Rotary actuators, e.g. step motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
- F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/52—Systems for actuating EGR valves
- F02M26/64—Systems for actuating EGR valves the EGR valve being operated together with an intake air throttle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/65—Constructional details of EGR valves
- F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
- F16K11/14—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle
- F16K11/16—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle which only slides, or only turns, or only swings in one plane
- F16K11/163—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle which only slides, or only turns, or only swings in one plane only turns
- F16K11/165—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by one actuating member, e.g. a handle which only slides, or only turns, or only swings in one plane only turns with the rotating spindles parallel to the closure members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
- F02B29/04—Cooling of air intake supply
- F02B29/0406—Layout of the intake air cooling or coolant circuit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/0276—Throttle and EGR-valve operated together
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/45—Sensors specially adapted for EGR systems
- F02M26/48—EGR valve position sensors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
521 751 Ändamålet med föreliggande uppfinning är därför att åstadkom- ma ett förfarande och en anordning som gör det möjligt att utnyttja ett EGR-systenz även. i en HD-dieselmotor, för att även i sådana få en avsevärd. sänkning av halten skadliga avgaser. The object of the present invention is therefore to provide a method and a device which make it possible to use an EGR system as well. in an HD diesel engine, so that even in such get a considerable. reduction of the content of harmful exhaust gases.
Detta ändamål har uppnåtts med ett förfarande och en anord- ning enligt de kännetecknande särdragen i. de efterföljande patentkraven l och 5, där avgaserna avleds från avgasröret och leds genom en återföringsledning till en styrbar ventil- anordning anordnad mellan motorns luftfilter och turboladdare för att medge tillförsel av luft/återcirkulerade avgaser i önskat förhållande till turboladdaren för vidare inmatning i motorns förbränningsrum.This object has been achieved by a method and a device according to the characterizing features of the appended claims 1 and 5, wherein the exhaust gases are diverted from the exhaust pipe and led through a return line to a controllable valve device arranged between the engine air filter and turbocharger to allow supply of air / recirculated exhaust gases in the desired ratio to the turbocharger for further input into the engine's combustion chamber.
Ett ytterligare ändamål som uppkommit under utvecklingen av lösningen på det ovanstående ändamålet med uppfinningen är att ta fram en ventil som är lämplig för användning i ett EGR-system för turboladdade dieselmotorer.A further object which has arisen during the development of the solution to the above object of the invention is to produce a valve which is suitable for use in an EGR system for turbocharged diesel engines.
Det ytterligare ändamålet med uppfinningen har uppnåtts med en ventil enligt de kännetecknande särdragen i patentkravet , där ventilen har två inloppskanaler i vilka båda är an- ordnat spjäll av vilka åtminstone ett alltid är öppet, och där en gemensam motor är anordnad att kunna stänga det ena spjället eller det andra spjället.The further object of the invention has been achieved with a valve according to the characterizing features of the claim, where the valve has two inlet channels in which both are arranged dampers of which at least one is always open, and where a common motor is arranged to be able to close one the damper or the other damper.
Med ett förfarande och en anordning enligt uppfinningen har man vid praktiska försök lyckats uppnå en avsevärd reduktion av NOx-halten från dieselmotorer jämfört med hittillsvarande teknik som enbart utnyttjat katalysator och partikelfilter.With a method and a device according to the invention, it has been possible in practical experiments to achieve a considerable reduction of the NOx content from diesel engines compared with prior art as only catalyst and particulate filters have been used.
Det har visat sig att man i stort sett kunnat uppnå en halve- ring av de tidigare lägsta mängderna NOx, och att man därige- F'\AP1"'S\GEMENSAM\ANSOKN@80152513 1998-] I -09 521 751 nom kunnat komma klart under det kommande gränsvärdet enligt Euro3.It has been found that it has largely been possible to achieve a halving of the previously lowest amounts of NOx, and that it has thus been possible to achieve the F> \ AP1 "'S \ JOINT \ ANSOKN @ 80152513 1998-] I -09 521 751 nom come well below the forthcoming Euro3 threshold.
Vid utvecklingen av förfarandet och anordningen enligt upp- finningen har man emellertid funnit att ett snarlikt förfa- rande enbart inriktat på att med hjälp av en ventilanordning som den avsedd att användas i förfarandet enligt uppfinningen åstadkomma en reglering av luft/bränsle-förhållandet till en dieselmotor även utan överladdning eller till en lättare dieselmotor kan ge en fördelaktig sänkning av avgashalterna även hos sådana motorer.In the development of the method and the device according to the invention, however, it has been found that a similar method is only aimed at achieving a regulation of the air / fuel ratio to a diesel engine by means of a valve device such as that intended for use in the method according to the invention. even without overcharging or to a lighter diesel engine can give a favorable reduction of the exhaust levels even in such engines.
Uppfinningen. omfattar därför även ett reglerförfarande för reglering av insugningsluften till en dieselmotor såsom defi- nierats i patentkraven 14-15.The invention. therefore also comprises a control method for regulating the intake air to a diesel engine as defined in claims 14-15.
Uppfinningen kommer nu att beskrivas i form av ett par icke begränsande utföringsexempel, åskàdliggjorda på de åtföljande 1 visar en principskiss av ett ritningsfigurerna, där Fig.The invention will now be described in the form of a pair of non-limiting exemplary embodiments, illustrated in the accompanying 1, show a schematic diagram of one of the drawing figures, in which Figs.
EGR-system enligt uppfinningen, Fig. 2a visar en uppskuren ventil enligt uppfinningen i ett ändläge, Fig. 2b visar en snittvy av ventilen i Fig. 2a sett i riktning av pilen B - B, Fig. 3a visar en uppskuren ventil enligt uppfinningen i ett mellanläge, Fig. 3b visar en snittvy av ventilen i Fig. 3a sett i riktning av pilen B - B, Fig. 4a visar en uppskuren ventil enligt uppfinningen i ett andra ändläge, och Fig. 4b visar en snittvy av ventilen i Fig. 4a sett i riktning av pilen B - B.EGR system according to the invention, Fig. 2a shows a cut-out valve according to the invention in an end position, Fig. 2b shows a sectional view of the valve in Fig. 2a seen in the direction of the arrow B - B, Fig. 3a shows a cut-out valve according to the invention in an intermediate position, Fig. 3b shows a sectional view of the valve in Fig. 3a seen in the direction of the arrow B - B, Fig. 4a shows a cut-out valve according to the invention in a second end position, and Fig. 4b shows a sectional view of the valve in Figs. 4a seen in the direction of the arrow B - B.
I Fig. 1 visas ett schematiskt schema över de för uppfinning- en väsentliga delarna kring en förbränningsmotor, som här är angiven med hänvisningssiffran 1. Till motorn l tas luft in genoni ett luftfilter 2 och leds via en inloppsluftkanal 3 F :\APPS\GEMEN SAM\ANSOKN\980 ISZSEDOC, 1998-] 1-09 521 751 till en turboladdare 4 där luften överladdas, för att sedan ledas vidare genom. en intercooler 5, där den överladdade luften kyls ner innan den leds in i motorn 1. Från motorn 1 leds avgaserna först genom turboladdarens 4 andra sida, den avgasrör 6, en sida som är drivande, och sedan genonl ett katalysator 7 och en partikelfälla 8, för att slutligen ledas ut i fria luften via ett ändrör 9.Fig. 1 shows a schematic diagram of the essential parts of an internal combustion engine for the invention, which are indicated here by the reference numeral 1. To the engine 1 air is taken in through an air filter 2 and led via an inlet air duct 3 F: \ APPS \ GEMEN SAM \ ANSOKN \ 980 ISZSEDOC, 1998-] 1-09 521 751 to a turbocharger 4 where the air is overcharged, to then be passed on through. an intercooler 5, where the supercharged air is cooled down before it is led into the engine 1. From the engine 1 the exhaust gases are first led through the other side of the turbocharger 4, the exhaust pipe 6, a side which is driving, and then through a catalyst 7 and a particle trap 8 , to be finally discharged into the open air via a tailpipe 9.
Från ändröret 9, dvs. avgasrörets förlängning efter katalysa- tor och partikelfälla finns en avgrening, en återföringsled- ning 10 för att från avgaserna återföra en del av dessa till motorn. Ãterföringsledningen 10 passerar lämpligen genom en kylare 11, för att kyla ner de återledda avgaserna och anslu- ter till inloppsluftkanalen 3 via en ventilanordning 12, som är styrbar med hjälp av en EGR-styranordning 13. Ventilanord- ningen 12 kan med. hjälp av EGR-styranordningen 13 reglera förhållandet mellan tillförd. mängd friskluft från inlopps- luftkanalen 3 och tillförd mängd àterförda avgaser från åter- föringsledningen 10.From the end pipe 9, ie. the extension of the exhaust pipe after the catalyst and particle trap there is a branch, a return line 10 to return some of these to the engine from the exhaust gases. The return line 10 suitably passes through a cooler 11, to cool the returned exhaust gases and connects to the inlet air duct 3 via a valve device 12, which is controllable by means of an EGR control device 13. The valve device 12 can be included. by means of the EGR control device 13 regulate the ratio between supplied. amount of fresh air from the inlet air duct 3 and supplied amount of returned exhaust gases from the return line 10.
EGR-styranordningen 13 tillföres från bl.a. som reglerar ventilanordningen 12 information om motorns aktuella driftstillstånd en Lambdasond 14, givare för motorvarvtal 15 och givare för gaspådragsläge 16, och är programmerad att styra ventilanordningen 12 och därmed blandningsförhållandet frisk- luft/avgaser i avsikt att minimera halten skadliga ämnen som lämnar ändröret 9 och släpps ut i fria luften. Programmering- en av EGR-styranordningen 13 sker på tidigare känt sätt för sambanden mellan de olika ovan angivna faktorerna.The EGR control device 13 is supplied from e.g. which regulates the valve device 12 information about the current operating condition of the engine a Lambda probe 14, sensor for engine speed 15 and sensor for throttle position 16, and is programmed to control the valve device 12 and thus the mixing ratio fresh air / exhaust gases in order to minimize harmful substances leaving the end pipe 9 and released into the open air. The programming of the EGR control device 13 takes place in a manner previously known for the relationships between the various factors stated above.
Ventilanordningen. 12 kan. innefatta separata 'ventiler i. in- loppsluftkanalen 3 och i återföringsledningen 10, vilka ven- tiler då är separat styrbara av EGR-styranordningen 13. Al- F:\APPS\GEMENSAM\ANSOKN\98OIS2SE.DOC, 1998-11-09 521 751 ternativt kan ventilanordningen 12 även innefatta en enhet, i vilken flöden från inloppsluftkanalen 3 och återföringsled- ningen 10 med hjälp av i ventilanordningen ingående ventiler selektivt kan sammanföras till ett gemensamt utgående flöde som leds vidare till turboladdaren för överladdning och in- matning i. motorn via intercoolern 5. En speciellt lämplig ventilanordning 12 i en enhet är en särskild del av uppfin- ningen, och beskrives närmare här nedan.The valve device. 12 kan. include separate 'valves in the inlet air duct 3 and in the return line 10, which valves are then separately controllable by the EGR control device 13. Al- F: \ APPS \ COMMON \ APPLICATION \ 98OIS2SE.DOC, 1998-11-09 521 751 alternatively, the valve device 12 may also comprise a unit in which flows from the inlet air duct 3 and the return line 10 can be selectively combined by means of valves included in the valve device to a common output flow which is passed on to the turbocharger for overcharging and supply in the engine. via the intercooler 5. A particularly suitable valve device 12 in a unit is a special part of the invention, and is described in more detail below.
Den i Fig. 2-4 visade ventilen är en typ av blandningsventil som medger blandning av två inkommande medier på så sätt att det inströmmande mediet i en av två inloppskanaler kan regle- ras från 0 till max., och därefter det inströmmande mediet i den andra inloppskanalen från max. till 0.The valve shown in Figs. 2-4 is a type of mixing valve which allows mixing of two incoming media in such a way that the inflowing medium in one of two inlet channels can be regulated from 0 to max., And then the inflowing medium in the second inlet duct from max. to 0.
Vid användning av ventilen enligt uppfinningen såsom visad i Fig. 2-4 som ventilanordning 12 vid förfarandet eller anord- ningen enligt uppfinningen är inloppsluftkanalen 3 ansluten till ventilens andra inloppskanal 18, medan återföringsled- ningen 10 är ansluten till ventilens första inloppskanal 17.When using the valve according to the invention as shown in Figs. 2-4 as valve device 12 in the method or device according to the invention, the inlet air duct 3 is connected to the second inlet duct 18 of the valve, while the return line 10 is connected to the first inlet duct 17 of the valve.
I ventilen finns vidare en utloppskanal 19, som i det aktuel- la användningsfallet leder de i till turboladdaren 4. spjäll 20 och 21, ventilen blandade gaserna I båda inloppskanalerna 17 och 18 finns som är vridbara mellan ett öppet och ett stängt läge medelst en ställmotor 22, exempelvis en stegmo- tor, för att öppna eller stänga inloppskanalerna. De båda spjällen 20, 21 sitter på koncentriska axlar 23, 24, som är vridbara med hjälp av ställmotorn 22 och ett av denna drivet 27 förbundna reglerstift 25, som kan vrida reglerarmar 26, med axlarna 23 resp. 24. Reglerarmarna 26, 27 är fjäderbelas- tade av fjädrar 28, 29 till ett normalläge, visat i Fig. 3, där båda spjällen 20, 21 hålls i läge så att inloppskanalerna 17, 18 är öppna.In the valve there is also an outlet duct 19, which in the present case of use leads the gases mixed to the turbocharger 4. dampers 20 and 21 In both inlet ducts 17 and 18 there are which are rotatable between an open and a closed position by means of an actuator motor. 22, for example a stepper motor, for opening or closing the inlet ducts. The two dampers 20, 21 sit on concentric shafts 23, 24, which are rotatable by means of the actuator motor 22 and a control pin 25, which can be driven by it 27, which can turn control arms 26, with the shafts 23 and 24. The control arms 26, 27 are spring-loaded by springs 28, 29 to a normal position, shown in Fig. 3, where both dampers 20, 21 are held in position so that the inlet channels 17, 18 are open.
F:\APPS\GEMENSAM\ANSOKN\9&Ol52SE.DOC, 1998-11-09 521 751 I läget visat i Fig. 2a, b, som är startläge, har ställmotorn 22 med hjälp av sitt reglerstift 25 och med hjälp av regler- armen 26 vridit spjället 20 till stängt läge, och därmed är förbunden med återföringsled- in till den första inloppskanalen 17, ningen 10, stängd och inga avgaser kan återledas turboladdaren och motorn. Den andra reglerarmen 27 hålls av fjädern 29 i sitt normalläge, som innebär att spjället 21 i den andra inloppskanalen 18, förbunden med inloppsluftkanalen 3, hålls i sitt normala öppetläge och tillåter fri strömning av inloppsluft genom ventilen via utloppskanalen 19 till turboladdaren. Ställmotorn 22 styrs av EGR-styranordningen 13 för att reglera förhållandet mellan friskluft via inlopps- luftkanalen 3 och återledda avgaser via återföringsledningen . I läget med spjället 21 öppet kan ställmotorn. 22 med hjälp av sitt reglerstift 25 och med hjälp av reglerarmen 26 vrida spjället 20 från det i Fig. 2a, b visade helt stängda läget till det i Fig. 3 a, b visade läget då även spjället 20 är i det läget att även den första inloppskanalen 17 är öp- pen. Ställmotorn kan även ställa in spjället 20 i vilket som helst läge mellan dessa båda ändlägen.F: \ APPS \ COMMON \ APPLICATION \ 9 & Ol52EN.DOC, 1998-11-09 521 751 In the position shown in Fig. 2a, b, which is the starting position, the actuator motor 22 by means of its control pin 25 and by means of the control arm 26 has turned the damper 20 to the closed position, and thus is connected to the return line to the first inlet duct 17, the ring 10, closed and no exhaust gases can be returned to the turbocharger and the engine. The second control arm 27 is held by the spring 29 in its normal position, which means that the damper 21 in the second inlet duct 18, connected to the inlet air duct 3, is kept in its normal open position and allows free flow of inlet air through the valve via the outlet duct 19 to the turbocharger. The actuator 22 is controlled by the EGR control device 13 to regulate the ratio between fresh air via the inlet air duct 3 and returned exhaust gases via the return line. In the position with the damper 21 open, the actuator motor can. 22 by means of its control pin 25 and by means of the control arm 26 turn the damper 20 from the position shown completely in Fig. 2a, b to the position shown in Fig. 3 a, b when the damper 20 is also in the position that also the the first inlet duct 17 is open. The actuator motor can also set the damper 20 in any position between these two end positions.
Det i Fig. 3 a, b visade läget, som är normalläget för ställ- motorn 22, är det läge när ställmotorns reglerstift 25 inte påverkar någon av reglerarmarna 26, 27 utan dessa av fjädrar- na 28, 29 är hållna i normalläge där således spjällen 20, 21 håller båda inloppskanalerna 17, 18 öppna.The position shown in Fig. 3 a, b, which is the normal position of the actuator 22, is the position when the actuator control pin 25 of the actuator does not act on any of the control arms 26, 27 but these of the springs 28, 29 are held in the normal position where the dampers 20, 21 keep both inlet ducts 17, 18 open.
I Fig. 4 a, b visas det mot Fig. 2 a, b motsatta läget, när således ställmotorn 22 med hjälp av sitt reglerstift 25 och med hjälp av reglerarmen 27 vridit spjället 21 till stängt läge, och således inloppsluftkanalens 3 förbindelse med ut- loppskanalen 19 är helt avbruten, medan däremot den första F:\APPS\GEMENSAM\ANSOKN\980l52SE.DOC, 1998-] [-09 521 751 inloppskanalen 17 förbunden med återföringsledningen 10, är helt öppen, återledda att fritt strömma vidare genom utloppskanalen 19 och vidare till turbo- tillåtande de avgaserna laddaren 4 och sedan vidare till motorn. Med hjälp av ställ- motorn 22 kan dock spjället 21 ställas i vilket som helst mellanläge mellan de i Fig. 3 och 4 visade ändlägena för att medge önskad, och av EGR-styranordningen 13 styrd, mängd friskluft för att blandas med de återledda avgaserna.In Fig. 4 a, b the position opposite Fig. 2 a, b is shown, when thus the adjusting motor 22 by means of its control pin 25 and by means of the control arm 27 turned the damper 21 to the closed position, and thus the connection of the inlet air duct 3 to the outlet the inlet duct 19 is completely disconnected, while on the other hand the first inlet duct 17 connected to the return line 10 is completely open, redirected to flow further through the outlet duct 19. and further to turbo-permitting the exhaust charger 4 and then on to the engine. With the aid of the actuator motor 22, however, the damper 21 can be set in any intermediate position between the end positions shown in Figs. 3 and 4 to allow the desired, and controlled by EGR control device 13, amount of fresh air to be mixed with the returned exhaust gases.
Med ventilen enligt uppfinningen blir det således möjligt att på enkelt sätt kunna styra en trevägsventil med två tillopp och som har ett normalläge där båda tilloppen är öppna, så att det ena eller det andra tilloppet kan regleras steglöst medan det icke reglerade tilloppet hålls öppet. Ventilen kan givetvis styras på andra sätt än med hjälp av den ovan be- skrivna EGR-styranordningen 13, och då användas i helt andra sammanhang än det nu beskrivna och där motsvarande styregen- skaper önskas.With the valve according to the invention it thus becomes possible to easily control a three-way valve with two inlets and which has a normal position where both inlets are open, so that one or the other inlet can be regulated steplessly while the unregulated inlet is kept open. The valve can of course be controlled in other ways than with the aid of the EGR control device 13 described above, and then used in completely different contexts than the one now described and where corresponding control properties are desired.
Med förfarandet och anordningen enligt uppfinningen har man på ett enkelt och effektivt sätt gjort det möjligt att även i HD-dieselmotorer kunna återföra avgaser till inloppet av en HD-dieselmotor. Såsom angivits inledningsvis har man med förfarandet och anordningen enligt uppfinningen kunnat uppnå en avsevärd sänkning av NOx-halten i en dieselmotors ändrör.With the method and the device according to the invention, it has been made possible in a simple and efficient manner even in HD diesel engines to be able to return exhaust gases to the inlet of an HD diesel engine. As stated at the outset, it has been possible with the method and the device according to the invention to achieve a considerable reduction of the NOx content in the end pipe of a diesel engine.
Vid ett reglerförfarande enligt uppfinningen utnyttjas en styranordning som tillföres information från en Lambdasond 14, givare för motorvarvtal 15 och givare för gaspådragsläge 16. Styranordningen är för reglering av de till motorn in- strömmande mängderna luft och/eller återledda avgaser anslu- ten till en ventilanordning, motsvarande ventilanordningen 12 beskriven här ovan. Denna ventilanordning är anordnad mellan F:\APPS\GEMENSAM\ANSOKN\980l52SI-I.DOC, 1998-11-09 521 751 luftfilter och motorns inloppskanal, och kan såsom även be- skrivits för ventilanordningen 12 innefatta separata ventiler i inloppsluftkanalen och återföringsledningen, eller en tre- vägsventil av det slag som också beskrivits här ovan. Ventil- anordningen är styrbar på motsvarande sätt som också beskri- vits här ovan, och styranordningen kan därför på grundval av de tillförda insignalerna reglera motorns luft/bränsle- förhållande genom att styra mängden inströmmande luft och samtidigt reglera förhållandet mellan tillförd friskluft och återledda avgaser.In a control method according to the invention, a control device is used which is supplied with information from a Lambda probe 14, sensors for engine speed 15 and sensors for throttle position 16. The control device is for regulating the amounts of air and / or returned exhaust gases connected to the engine to a valve device. , corresponding to the valve device 12 described above. This valve device is arranged between the air filter and the engine inlet duct, and may, as also described for the valve device 12, comprise separate valves in the inlet air duct and the return line, or a three-way valve of the type also described above. The valve device is controllable in a manner similar to that described above, and the control device can therefore, on the basis of the input signals, regulate the engine air / fuel ratio by controlling the amount of inflowing air and at the same time regulate the ratio between supplied fresh air and returned exhaust gases.
Med reglerförfarandet enligt uppfinningen har man kunnat ytterligare minska NOx-halten i de avgaser som. lämnar en dieselmotors ändrör.With the control process according to the invention it has been possible to further reduce the NOx content in the exhaust gases which. leaves the end tube of a diesel engine.
FÅAPPQGEMENSAWANSOKXJWSGISZSEDOC, 1998-11-09FÅAPPQGEMENSAWANSOKXJWSGISZSEDOC, 1998-11-09
Claims (13)
Priority Applications (26)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9803827A SE521751C2 (en) | 1998-11-09 | 1998-11-09 | Method for recirculating part of exhaust gases from exhaust pipe of diesel engine to its inlet has at least one of dampers always maintained open and that other damper closed using drive motor common to dampers |
SE9804240A SE521713C2 (en) | 1998-11-09 | 1998-12-07 | Procedure and apparatus for an EGR system, and such valve |
CA002347874A CA2347874C (en) | 1998-11-09 | 1999-11-09 | A method and device for an egr-system and a valve as well as a regulation method and device |
EP20040004111 EP1426605A3 (en) | 1998-11-09 | 1999-11-09 | A regulation method and device for exhaust gas recirculation |
IL16116199A IL161161A0 (en) | 1998-11-09 | 1999-11-09 | A method and device for an egr-system and a valve as well as a regulation method and device |
TR200101301T TR200101301T2 (en) | 1998-11-09 | 1999-11-09 | A method related to an EGR-system, a device and a valve, plus an arrangement method and device |
NZ511364A NZ511364A (en) | 1998-11-09 | 1999-11-09 | A method and device for an EGR-system having a valve with dampers one of which is always maintained open |
AU15917/00A AU754789C (en) | 1998-11-09 | 1999-11-09 | A method and device for an EGR-system and a valve as well as a regulation method and device |
BR9915167A BR9915167A (en) | 1998-11-09 | 1999-11-09 | A method and a device for an egr system and a valve as well as a method and a regulating device |
RU2001116113A RU2230212C2 (en) | 1998-11-09 | 1999-11-09 | Method of, device for and valve for exhaust gas recirculation system and c ontrol method and device |
IL14275699A IL142756A (en) | 1998-11-09 | 1999-11-09 | Method and device for an egr-system and a valve as well as regulation method and device |
CNA2004100399145A CN1529047A (en) | 1998-11-09 | 1999-11-09 | Method and apparatus for regulating dieselengine |
PCT/SE1999/002029 WO2000028203A1 (en) | 1998-11-09 | 1999-11-09 | A method and device for an egr-system and a valve as well as a regulation method and device |
US09/831,435 US6925992B1 (en) | 1998-11-09 | 1999-11-09 | Method and device for an EGR-system and a valve as well as a regulation method and device |
AT99958578T ATE287496T1 (en) | 1998-11-09 | 1999-11-09 | METHOD AND DEVICE FOR AN EXHAUST GAS RECIRCULATION SYSTEM AND ASSOCIATED VALVE |
EP99958578A EP1129281B1 (en) | 1998-11-09 | 1999-11-09 | A method and device for an egr-system and a valve |
DE69923341T DE69923341T2 (en) | 1998-11-09 | 1999-11-09 | METHOD AND DEVICE FOR AN EXHAUST GAS RECYCLING SYSTEM AND ASSOCIATED VALVE |
JP2000581355A JP2002529653A (en) | 1998-11-09 | 1999-11-09 | Methods and devices for EGR systems and valves and adjustment methods and devices |
CNB998152145A CN1151334C (en) | 1998-11-09 | 1999-11-09 | Method and device for EGR-system and valve as well as regulation method and device |
PL347572A PL199883B1 (en) | 1998-11-09 | 1999-11-09 | A method and device for an egr-system and a valve as well as a regulation method and device |
MYPI99004838A MY125895A (en) | 1998-11-09 | 1999-11-09 | A method and device for an egr- system and a valve |
KR1020017005776A KR100749706B1 (en) | 1998-11-09 | 1999-11-09 | A method and device for an egr-system and a valve as well as a regulation method and device |
ZA200103281A ZA200103281B (en) | 1998-11-09 | 2001-04-23 | A method and device for an egr-system and a valve as well as a regulation method and device. |
NZ524686A NZ524686A (en) | 1998-11-09 | 2003-03-12 | Regulating device for diesel engine with recirculated exhaust gas to inlet using lambda probe, and engine load and speed sensors |
US11/059,493 US7017560B2 (en) | 1998-11-09 | 2005-02-08 | Method and device for an EGR-system and a valve as well as a regulation method and device |
US11/059,491 US20050145229A1 (en) | 1998-11-09 | 2005-02-08 | Method and device for an EGR-system and a valve as well as a regulation method and device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9803827A SE521751C2 (en) | 1998-11-09 | 1998-11-09 | Method for recirculating part of exhaust gases from exhaust pipe of diesel engine to its inlet has at least one of dampers always maintained open and that other damper closed using drive motor common to dampers |
Publications (3)
Publication Number | Publication Date |
---|---|
SE9803827D0 SE9803827D0 (en) | 1998-11-09 |
SE9803827L SE9803827L (en) | 2000-05-10 |
SE521751C2 true SE521751C2 (en) | 2003-12-02 |
Family
ID=20413225
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9803827A SE521751C2 (en) | 1998-11-09 | 1998-11-09 | Method for recirculating part of exhaust gases from exhaust pipe of diesel engine to its inlet has at least one of dampers always maintained open and that other damper closed using drive motor common to dampers |
Country Status (2)
Country | Link |
---|---|
SE (1) | SE521751C2 (en) |
ZA (1) | ZA200103281B (en) |
-
1998
- 1998-11-09 SE SE9803827A patent/SE521751C2/en not_active IP Right Cessation
-
2001
- 2001-04-23 ZA ZA200103281A patent/ZA200103281B/en unknown
Also Published As
Publication number | Publication date |
---|---|
SE9803827L (en) | 2000-05-10 |
ZA200103281B (en) | 2001-12-18 |
SE9803827D0 (en) | 1998-11-09 |
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