Shaye tsarin sake dawowa da gas

Tare da ƙarin buƙatun ƙa'idodin muhalli, ana ƙara ƙarin tsarin a hankali a cikin motar zamani wacce ke canza yanayin aiki na injin ƙone ciki, daidaita abubuwan da ke cikin cakuda-mai, cinye haɗin mahaɗan hydrocarbon da ke cikin shaye-shaye, da sauransu.

Irin waɗannan na'urori sun haɗa da catalytic canji, mai tallatawa, AdBlue da sauran tsarin. Mun riga munyi magana akan su daki-daki. Yanzu zamu maida hankali kan tsari guda daya, wanda yakamata kowane mai mota ya kula da lafiyar shi. Wannan sake sharar gas ne. Bari muyi la'akari da yadda zane tsarin yake, yadda yake aiki, wadanne nau'ikan ne, da kuma irin fa'idodin da yake dashi.

Menene tsarin sake shigar da gas din mota

A cikin wallafe-wallafen fasaha da kuma bayanin abin hawa, ana kiran wannan tsarin EGR. Tabbatar da wannan gajeriyar daga Ingilishi a zahiri yana nufin "sake fitowar iskar gas". Ba tare da shiga cikin cikakken bayani game da sauye-sauyen tsarin daban-daban ba, a zahiri, wannan kwandon juyawa ne wanda aka sanya akan bututun da ke haɗa abubuwan ci da shaye-shaye.

An shigar da wannan tsarin a kan dukkan injunan zamani waɗanda aka kera da na'urar sarrafa lantarki. Lantarki yana ba ka damar daidaita daidaitattun abubuwa da matakai a cikin rukunin wutar, da kuma tsarin da aikinsa yake da alaƙa da aikin injin ƙone ciki.

A wani lokaci, murfin EGR yana buɗewa kaɗan, saboda haka ne shagon ya shiga sashin ingin ɗin injin ɗinsa (don ƙarin bayani game da na'urar da tsarin aikinta, karanta a cikin wani bita). A sakamakon haka, sabon iska mai iska yana hade da sashin gas. Dangane da wannan, tambayar tana tasowa: me yasa kuke buƙatar iskar gas a cikin tsarin cin abinci, idan ana buƙatar isasshen iskar oxygen don aikin injiniya mai inganci? Idan akwai adadin iskar oxygen da ba a ƙone a cikin iskar gas ɗin ba, binciken lambda na iya nuna wannan (an bayyana shi dalla-dalla a nan). Bari muyi ƙoƙari mu magance wannan da alama ta saɓani.

Manufar tsarin sharar iskar shaka

Ba sirri bane ga kowa cewa ba wai kawai ana samarda makamashi mai kyau ba yayin konewar mataccen mai da iska a cikin silinda. Wannan aikin yana tare da fitowar adadi mai yawa na abubuwa masu guba. Mafi haɗari daga waɗannan su ne sinadarin nitrogenous. Wani ɓangare ana musayar su ta hanyar mai canzawa, wanda aka sanya a cikin tsarin shaye shaye na mota (waɗanne abubuwa ne wannan tsarin ya ƙunsa, kuma ta yaya yake aiki, karanta daban).

Wata dama don rage abubuwan da ke cikin waɗannan abubuwan a cikin sharar shine canza abun da ke cikin cakuda-mai. Misali, na'urar sarrafa lantarki tana kara ko rage adadin mai da aka saka a cikin sabon iska. Wannan ana kiran sa talaucin MTC / wadatarwa.

A gefe guda, mafi yawan oxygen ya shiga cikin silinda, hakan ya fi yawan zafin jiki na iska / cakuda mai. A yayin wannan aikin, ana fitar da sinadarin nitrogen daga haduwar yanayin zafi na mai ko man dizel da yanayin zafi mai yawa. Wannan sinadarin ya shiga cikin aikin maye gurbin oxygen, wanda bashi da lokacin konewa. Bugu da ƙari, ƙimar samuwar waɗannan oxides yana da alaƙa kai tsaye da yanayin zafi na yanayin aiki.

Dalilin sake komowa tsarin shine daidai don rage adadin oxygen a cikin sabon iska. Saboda kasancewar ƙaramin hayaƙin gas a cikin abin da ke cikin VTS, an samar da ɗan sanyayawar aikin ƙonewa a cikin silinda. A wannan yanayin, kuzarin aikin kansa ba ya canzawa, tunda ƙarar guda ɗaya tana ci gaba da gudana cikin silinda, wanda ya ƙunshi adadin oxygen da ake buƙata don ƙone mai.

Ana ɗaukar kwararar iskar gas bisa al'ada inert, tunda kayan ƙonewar HTS ne. Saboda wannan dalili, da kanta, ba shi da ikon konawa. Idan an haɗu da wasu iskar gas mai ƙare a cikin wani sabon ɓangare na cakuda mai-iska, yanayin zafi na ƙonewa zai ɗan ragu. Saboda wannan, aikin narkar da nitrogen zai zama ba mai aiki ba. Gaskiya ne, sake juyawa kadan yana rage ikon ƙungiyar wutar, amma motar tana riƙe da kuzarin kuzari. Wannan rashin amfanin yana da mahimmanci kuma kusan ba zai yuwu a lura da banbanci a jigilar talakawa ba. Dalili kuwa shine cewa wannan aikin baya faruwa a yanayin ƙarfin injin ƙone ciki, lokacin da hanzarin sa ya tashi. Yana aiki ne kawai a ƙarami da matsakaiciyar rpm (a cikin sassan mai) ko rago da ƙaramar rpm (a yanayin injunan dizal).

Don haka, manufar tsarin EGR shine don rage yawan guba mai shaye shaye. Godiya ga wannan, motar tana da ƙarin damar da za ta dace da tsarin ƙa'idodin muhalli. Ana amfani da shi akan kowane injin ƙona ciki na zamani, ba tare da la'akari da mai ko mai bane ba. Abin sani kawai shine cewa tsarin bai dace da wasu raka'a waɗanda aka kera su da turbochargers ba.

Manufofin aiki na gaba daya na tsarin sake iskar gas

Kodayake a yau akwai nau'ikan tsarurruka da yawa waɗanda haɗuwa da abubuwan shaye-shaye da yawa zuwa mashiga ta cikin iska mai ɗaukar iska, suna da ƙa'idar aiki ta yau da kullun.

Bawul din ba koyaushe zai bude ba. Lokacin da injin sanyi ya fara, yana aiki ba tare da komai ba, haka kuma idan ya kai iyakar saurin crankshaft, dole maƙasudin ya kasance a rufe. A wasu hanyoyin, tsarin zaiyi aiki, kuma ɗakin konewa na kowane rukunin silinda-piston zai karɓi ƙananan kayayyakin ƙone mai.

Idan na'urar zata yi aiki da saurin injin ta ko yayin kai wa yanayin zafin ta na aiki (game da me ya kamata, karanta a nan), naúrar za ta zama m. Matsakaicin ingancin kwandon EGR ana samunsa ne kawai lokacin da injin ke aiki kusa da matsakaicin rpm. A wasu halaye, ƙimar nitrogen oxides ya ragu sosai.

Lokacin da injin ke dumama, zafin yanayin konewa a cikin ɗakunan ba shi da girma har ya zama ana yin babban adadin sinadarin nitrous, kuma ba a buƙatar ƙaramin shaye shaye don komawa cikin silinda. Hakanan yana faruwa a ƙananan gudu. Lokacin da injin ya kai iyakar gudu, ya kamata ya haɓaka iyakar ƙarfi. Idan bawul din ya kunna, zai tsoma baki ne kawai, sabili da haka, a cikin wannan yanayin, tsarin zai kasance cikin yanayin rashin aiki.

Ba tare da la'akari da nau'in tsarin ba, maɓallin keɓaɓɓe a cikin su shine abin toshewa wanda ke toshe hanyar samun iskar gas zuwa ga tsarin cin abincin. Tunda babban zazzabin rafin gas yana ɗaukar ƙarar sama da analog ɗin da aka sanyaya, ana buƙatar sanyaya gas ɗin da yake sharar iska don ƙarancin ƙonewar HTS ya ragu. Don wannan, akwai ƙarin mai sanyaya ko mai sanyaya mai hade da tsarin sanyaya injin. Kewaya a cikin kowane samfurin mota na iya zama daban, amma zai sami radiator wanda ke daidaita aikin kiyaye mafi kyawun yanayin zafi na na'urar.

Game da injunan dizal, bawul dinsu a buɗe yake a XX. Rashin wuri a cikin tsarin cin abinci yana jan iska mai ƙarewa cikin silinda. A wannan yanayin, injin yana karɓar kusan kashi 50 cikin ɗari na iskar gas (dangane da iska mai tsabta). Yayin da saurin ke ƙaruwa, mai yin danshi a hankali yana motsa shi zuwa rufaffiyar wuri. Wannan shine ainihin yadda dizal ke aiki.

Idan muka yi magana game da naúrar gas, to, yawan haɗarin iskar gas a cikin hanyar shan iska yana cike da mummunan aiki na injin ƙone ciki. Sabili da haka, a wannan yanayin, aikin tsarin ya ɗan bambanta. Bawul din yana bude lokacin da injin ya kai matsakaiciyar gudu. Bugu da ƙari, abubuwan da ke shaye a cikin sabon ɓangaren BTC bai kamata ya wuce kashi 10 cikin ɗari ba.

Direba ya sami labarin rashin ingancin sabuntawa ta siginar Injin Dubawa akan dashboard. Anan akwai manyan raunin da irin wannan tsarin zai iya samu:

• Na'urar haska murfin budewa ta karye. Yawancin lokaci, ban da sashi ba daidai ba da kuma kwan fitila wanda ke haskakawa bisa tsari, babu wani abu mai mahimmanci da zai faru.
• Lalacewa ga bawul din ko firikwensin sa. Babban dalilin wannan matsalar shine saduwa da kai tsaye tare da iskan gas masu fitowa daga motar. Dogaro da nau'in tsarin, lalacewar wannan ɓangaren na iya zama tare da raguwa ko akasin haka na haɓaka MTC. Idan injina suna amfani da tsarin da aka hada dasu dauke da na'urori masu auna sigina irin su MAF da MAP, to a rashi cakuda ya zama ya wadata gaba daya, kuma a wani hanzari ba gudu ba, BTC yana da rauni matuka.

Lokacin da tsarin ya gaza, mai ko dizal ba ya ƙonewa ƙwarai, saboda abin da ke tattare da matsalar aiki, misali, rayuwar aiki ta mai haɓaka tana raguwa ƙwarai. Wannan shine yadda halayyar motar take a aikace tare da lahanin dawo da iskar gas.

Don daidaita aiki, sashin sarrafawa yana daidaita aikin tsarin mai da ƙonewa (idan naúrar mai ne). Koyaya, ba zai iya jurewa da wannan aikin ba a cikin yanayin wucin gadi, tunda buɗe maƙura yana ƙaruwa sosai, kuma ƙarancin shaye-shaye yana tashi da ƙarfi, saboda abin da iskar gas mai ƙarancin ruwa ke gudana ta cikin rufin buɗewa.

A sakamakon haka, injin din baya karbar adadin iskar oksijin da yake da muhimmanci domin kona mai gaba daya. Dogaro da matakin lalacewa, motar na iya yin laushi, kuskure, rashin kwanciyar hankali ko rashin cikakken XX, injin ƙonewa na ciki zai iya farawa da kyau, da dai sauransu.

Lubrication na hauka yana nan a cikin yawancin kayan naúrar. Tare da ma'amalarsa ta yau da kullun tare da iskar gas mai zafi, sassan ciki na abubuwa da yawa, bawul, farfajiyar waje ta allurar allura da fulogogin wuta da sauri za a rufe su da ajiyar carbon. A wasu lokuta, ƙonewar man zai iya faruwa kafin BTC ya shiga cikin silinda (idan ka danna matattarar mai saurin).

Dangane da rashin saurin aiki mara aiki, idan har gazawar bawul din Ugr ta tashi, zai iya ɓacewa gaba ɗaya, ko kuma ya tashi zuwa iyakoki masu mahimmanci. Idan motar tana sanye da kayan aiki ta atomatik, to mai motar a cikin akwati na biyu da sannu zai kashe kuɗi akan gyaran watsa atomatik. Tunda kowane mai ƙera masarufi yana aiwatar da aikin sake komo da iskar gas ɗin ta yadda yake so, rashin ingancin wannan tsarin na mutum ne. Hakanan, sakamakon wannan yana shafar yanayin fasaha na ƙungiyar wutar, kai tsaye, da tsarin mai.

Kashe tsarin zai sa injin dizal ya yi aiki tuƙuru. Injin mai zai dandana kuzarin mai. A wasu lokuta, mai sanya kayan yayi saurin toshewa saboda yawan toshewar da ke bayyana sakamakon amfani da gurbataccen iskar mai. Dalilin shi ne cewa an tsara kayan lantarki na motar zamani don wannan tsarin. Don hana sashin sarrafawa daga yin kwaskwarima don sake zagayowar, kuna buƙatar sake rubuta shi, kamar yadda yake tare da guntu kunna (karanta game da wannan aikin a nan).

Nau'in tsarin maimaitawa

A cikin motar zamani, ɗayan nau'ikan nau'ikan nau'ikan tsarin EGR guda uku ana iya sanya su akan rukunin wutar lantarki:

1. A daidai da Euro4 eco-misali. Wannan babban tsarin matsin lamba ne. Falon yana tsaye kai tsaye tsakanin abubuwan ci da shaye shaye. A ƙofar fita daga motar, injin ɗin yana tsaye a gaban injin turbin. A wannan yanayin, ana amfani da bawul din lantarki-pneumatic (a baya, ana amfani da analog ɗin pneumo-mechanical). Ayyukan irin wannan makircin shine kamar haka. Bawul din caji rufe - injin yana aiki. Thearancin da ke cikin wurin shan magani ƙarami ne, don haka an rufe faɗin. Lokacin da ka danna mai hanzari, yanayin da ke cikin ramin yana ƙaruwa. A sakamakon haka, an ƙirƙiri matsa lamba ta baya a cikin tsarin cin abinci, saboda abin da bawul ɗin ya buɗe gaba ɗaya. An mayar da wasu adadin iska mai shaka zuwa silinda. A wannan halin, injin turbin ba zai yi aiki ba, tunda iska mai ƙarancin iska ya yi ƙasa, kuma ba za su iya juya abin da ke motsa shi ba. Pneumatic bawul ba sa rufewa bayan buɗewa har sai saurin motar ya sauka zuwa ƙimar da ta dace. A cikin tsarin zamani na yau da kullun, ƙirar sake dawowa ya haɗa da ƙarin bawul da na'urori masu auna firikwensin da ke daidaita aikin daidai da yanayin motar.
2. A daidai da Euro5 eco-misali. Wannan tsarin shine matsin lamba. A wannan yanayin, an ɗan daidaita zane. Damper ɗin yana cikin yankin bayan matattarar ƙwaya (game da dalilin da yasa ake buƙatarsa, da yadda yake aiki, karanta a nan) a cikin tsarin shaye shaye, da kuma cin abincin - a gaban turbocharger. Amfanin wannan gyare-gyare shine cewa iskar gas ɗin da ke sharar lokaci tana da ɗan sanyi kaɗan, kuma saboda wucewarsu ta cikin matatar, an tsarkake su daga ƙoshin lafiya da sauran abubuwan haɗin haɗi, saboda abin da na'urar da ke cikin tsarin da ta gabata ke da ɗan gajeren rayuwa . Wannan tsari yana ba da dawowar iskar gas a cikin yanayin turbocharging, tunda shaye-shayen gaba daya yana ratsawa ta cikin iska mai karfin iska kuma yana juya shi. Godiya ga irin wannan na’urar, tsarin ba ya rage karfin injina (kamar yadda wasu masu motoci ke fada, ba ya “shake” injin din). A yawancin samfuran mota na zamani, an sake sabunta matatar mai samarda kayan kara kuzari. Saboda gaskiyar cewa bawul din da firikwensin sa suna nesa da naúrar motar da aka ɗora mata zafi, ba kasafai suke gazawa ba bayan yawancin hanyoyin. Yayin sabuntawa, za'a rufe bawul din kamar yadda injin din yake bukatar karin mai da kuma karin oxygen don dagawa dan lokaci zafin jikin DPF na wani lokaci kuma ya kona sokin da yake ciki.
3. A daidai da Euro6 eco-misali. Wannan tsarin hadewa ne. Tsarinsa ya ƙunshi abubuwa waɗanda ɓangare ne na na'urorin da aka bayyana a sama. Tunda kowane ɗayan waɗannan tsarin yana aiki ne kawai a cikin yanayinsa, cin abinci daga tsarin shaye-shaye na injin konewa na ciki an sanye shi da bawuloli daga nau'ikan nau'ikan hanyoyin sake juyawa. Lokacin da matsin lamba a cikin kayan abinci mai yawa yayi ƙasa, matakin da ya saba da alamar Euro5 (ƙananan matsa lamba) yana haifar, kuma idan lodin ya ƙaru, ana kunna matakin, wanda ake amfani dashi a cikin motocin da suka dace da Euro4 (high pressure) eco misali.

Wannan shine yadda tsarin ke aiki wanda yake daga nau'in sake dawowa na waje (aikin yana faruwa a waje da sashin wuta). Ban da shi, akwai nau'ikan da ke samar da wadataccen iskar gas. Zai iya yin aiki daga wani ɓangare na shaye-shaye kamar yana shigar da kayan abinci da yawa. Wannan aikin ne kawai ake tabbatar dashi ta hanyar cranking camshafts. Don wannan, an ƙara sauyawa lokaci a cikin tsarin rarraba gas. Wannan sinadarin, a wani yanayi na aiki na injin konewa na ciki, ya dan canza lokacin bawul din (menene shi, kuma menene darajar su ga injin, an bayyana shi daban).

A wannan yanayin, dukkan bawul ɗin silinda suna buɗewa a wani lokaci. Haɗin iskar gas a cikin sabon ɓangaren BTC ya dogara da tsawon lokacin da waɗannan bawul ɗin suke buɗewa. A yayin wannan aikin, mashigar tana buɗewa kafin piston ya isa tsakiyar matacce kuma maɓallin ya rufe kafin TDC na fistan. Saboda wannan ɗan gajeren lokacin, ƙaramin shaye shaye yana gudana zuwa cikin tsarin cin abincin sannan ana tsotsarsa a cikin silinda yayin da fiston ke motsawa zuwa BDC.

Fa'idar wannan gyare-gyare shine mafi rarraba rarraba iska a cikin silinda, kazalika da saurin tsarin yana da girma fiye da yanayin sake dawo da yanayin waje.

Tsarin sake zagayowar zamani sun hada da wani karin radiator, mai musayar zafin wanda hakan zai bada damar sanya hayakin shaye da sauri a sanyaya shi kafin ya shiga hanyar shiga. Ba shi yiwuwa a tantance takamaiman tsarin wannan tsarin, tunda masu kera mota suna aiwatar da wannan tsari bisa tsari daban-daban, kuma ana iya samun karin abubuwan sarrafawa a cikin na'urar.

Bayanai na sake dawowa gas

Na dabam, yakamata a ambaci nau'ikan bawul din EGR. Sun banbanta da juna a yadda ake mulkar su. Dangane da wannan rarrabuwa, duk hanyoyin sun kasu kashi biyu:

• Bawul na pneumatic. Irin wannan na'urar ba safai ake amfani da ita ba. Suna da ƙa'idar aikin aiki. Ana buɗe faɗin ta wurin yanayin da aka samar a cikin hanyar shan abincin.
• Wutar lantarki-pneumatic. An haɗa murfin lantarki mai sarrafawa ta hanyar ECU zuwa bawul ɗin pneumatic a cikin irin wannan tsarin. Kayan lantarki na tsarin jirgi yana nazarin yanayin motar, kuma yana daidaita aikin damp din. Controlungiyar sarrafa lantarki tana karɓar sigina daga na'urori masu auna sigina don yanayin zafin jiki da matsin iska, yanayin zafi mai sanyaya, da dai sauransu. kuma, gwargwadon bayanan da aka karɓa, yana kunna wutan lantarki na na'urar. Abubuwan da aka keɓance na waɗannan bawul ɗin shine cewa damfin a cikinsu ko dai a buɗe yake ko rufe shi. Za'a iya ƙirƙirar buɗaɗɗen wuri a cikin tsarin ci ta ƙarin famfo mai ƙarancin iska.
• Lantarki. Wannan shine cigaban hanyoyin zamani. Bayanai na solenoid suna aiki kai tsaye daga sigina daga ECU. Amfanin wannan gyare-gyare shine ingantaccen aikinsu. Ana bayar da shi ta matsayi mai laushi uku. Wannan yana ba da damar tsarin ya daidaita aikin shaye shaye ta atomatik daidai da yanayin injin ƙonewa na ciki. Tsarin baya amfani da wuri a cikin hanyar cin abinci don sarrafa bawul.

Amfanin tsarin maimaitawa

Sabanin yarda da yarda cewa tsarin ababen hawa na ababen hawa ba ya da fa'ida ga wutar lantarki, sake dawo da iskar gas yana da wasu fa'idodi. Wani ba zai fahimci dalilin da ya sa ya sanya tsarin da zai rage karfin injin konewa na ciki ba, idan za a iya amfani da karin masu tsaka tsaki (amma a wannan yanayin, tsarin shaye shaye zai zama "zinariya" a zahiri, tunda ana amfani da karafa masu tamani don kawar da abubuwa masu guba) . A saboda wannan dalili, masu irin waɗannan injuna wani lokacin an saita su don musaki tsarin. Duk da alamun rashin amfani, sake amfani da iskar gas har ma yana amfani da rukunin wutar a wasu hanyoyi.

Ga wasu dalilai na wannan tsari:

1. A cikin injin mai, saboda ƙarancin octane number (game da menene, da kuma wace rawar da wannan siga ke shafar injin ƙonewa na ciki, karanta daban) fashewar mai sau da yawa yakan faru. Kasancewa da wannan matsalar ta hanyar firikwensin wannan sunan, wanda aka bayyana dalla-dalla a nan... Kasancewar tsarin maimaitawa yana kawar da wannan mummunan tasirin. Duk da alamun sabani, kasancewar bawul na egr, akasin haka, yana ba da damar haɓaka ƙarfin naúrar, misali, idan ka saita lokaci daban-daban na ƙonewa don ƙonewar baya.
2. Gaba mai zuwa kuma ya shafi injunan mai. A cikin maɓallin irin waɗannan ICEs, sau da yawa akan sami babban faɗuwar matsi, saboda abin da ake samun ƙaramin asara na iko. Aikin recirculation yana ba da damar rage wannan tasirin kuma.
3. Game da injunan dizal, a cikin yanayin XX, tsarin yana ba da laushi mai aiki na injin ƙonewa na ciki.
4. Idan mota ta wuce kula da muhalli (alal misali, yayin tsallaka kan iyaka tare da ƙasashen EU, wannan aikin wajibi ne), to kasancewar sake amfani da su yana ƙara damar wuce wannan rajistan da samun izinin wucewa.

A mafi yawan samfuran mota, tsarin komowa ba sauƙin kashewa, kuma don injin ya yi aiki kwata-kwata ba tare da shi ba, ana buƙatar yin ƙarin saituna na ƙungiyar sarrafa lantarki. Shigar da sauran software zai hana ECU amsawa ga rashin sigina daga firikwensin EGR. Amma babu irin waɗannan shirye-shiryen masana'antar, don haka canza saitunan lantarki, mai motar yana aiki da haɗarinsa da haɗarinsa.

A ƙarshe, muna ba da ɗan gajeren bidiyo mai rai akan yadda recirculation yake aiki a cikin motar:

Bayani mai sauki game da Sake Sake Gas (EGR)

Tambayoyi & Amsa:

Yadda ake bincika bawul ɗin EGR? Lambobin bawul suna da kuzari. Ya kamata a ji dannawa. Sauran hanyoyin sun dogara da wurin shigarwa. Ainihin, ana buƙatar ɗan danna maɓalli na injin yayin da injin ke gudana.

Menene EGR bawul don? Wannan wani abu ne da ya zama dole don rage abun ciki na abubuwa masu cutarwa a cikin shaye-shaye (wasu daga cikin iskar gas ana kai su zuwa ga yawan abubuwan da ake sha) kuma don haɓaka aikin naúrar.

Ina ne bawul ɗin EGR yake? Ya dogara da ƙirar motar. Kuna buƙatar nemo shi a cikin yanki na nau'in kayan abinci (a kan manifold kanta ko a kan bututun da ke haɗa abin da ake amfani da shi zuwa injin).

Ta yaya bawul ɗin shaye-shaye ke aiki? Lokacin da aka ƙara buɗe magudanar, saboda bambancin matsa lamba a cikin abubuwan da ake amfani da su da abubuwan shaye-shaye, wani ɓangare na iskar gas ɗin yana tsotsewa cikin tsarin ci na injin konewa na ciki ta hanyar bawul ɗin EGR.