Bawul ɗin EGR (bawul ɗin recirculation gas) samfur na mechatron ne wanda aka sanya akan injin dizal don sarrafa adadin sake zagayowar iskar gas da aka dawo da shi zuwa tsarin ci.
Bawul ɗin EGR samfuri ne na mechatronic da aka sanya akan injin dizal don sarrafa adadin sake zagayowar iskar gas da aka dawo da shi zuwa tsarin sha. Yawancin lokaci yana gefen dama na tarin abubuwan sha, kusa da ma'aunin jiki, kuma ana haɗa shi da ɗan gajeren bututun ƙarfe wanda zai kai ga yawan shaye-shaye. Aikinsa shi ne sarrafa yawan iskar gas da ke shiga ma’adanin da ake sha, ta yadda wani adadin iskar iskar gas ya shiga cikin na’urar shan domin sake zagayawa. Bawul ɗin EGR wani abu ne mai mahimmanci da mahimmanci a cikin na'urar sake zagayowar iskar gas.
EGR bawul ya kasu kashi biyu: nau'in inji da nau'in sarrafa lantarki.
Bawul ɗin EGR yana rage yawan zafin jiki na ɗakin konewa ta hanyar jagorantar iskar gas ɗin da aka fitar daga konewar injin zuwa nau'ikan abubuwan da za a iya amfani da su don shiga cikin konewar, inganta ingantaccen aikin injin, haɓaka yanayin konewa, da rage nauyi akan konewar. injin, yadda ya kamata rage fitar da NO mahadi, rage knocking, da kuma tsawaita lokacin kowane bangare. rayuwar sabis.
Cikakken suna shi ne Exhaust Gas Recirculation, wato, recirculation gas recirculation [1] Ana amfani da tsarin don rage fitar da iskar nitrogen oxides (NOX) a cikin iskar gas. Nitrogen da oxygen suna amsa sinadarai ne kawai a ƙarƙashin yanayin zafi da matsanancin yanayi, kuma zafin jiki da matsa lamba a cikin ɗakin konewar injin sun cika waɗannan sharuɗɗan, musamman a lokacin haɓakar tilastawa. Lokacin da injin ke gudana a ƙarƙashin kaya, bawul ɗin EGR yana buɗewa, yana ba da damar ƙaramin adadin iskar gas don shigar da nau'ikan abubuwan amfani da cikin ɗakin konewa tare da cakuda mai ƙonewa. Ana rufe bawul ɗin EGR ba aiki, kuma ɗan ƙaramin iskar gas yana sake zagayawa zuwa injin. Gas mai shaye-shaye na mota iskar gas ce mara ƙonewa (ba tare da mai da oxidant) wanda baya shiga cikin konewa a ɗakin konewa. Yana rage zafin konewa da matsa lamba ta hanyar ɗaukar wani ɓangare na zafin da ake samu ta hanyar konewa don rage samar da iskar nitrogen. Yawan iskar gas da ke shiga ɗakin konewa yana ƙaruwa tare da saurin injin da kaya
Sake sake zagayowar iskar gas wata hanya ce da ake shigar da wani ɓangare na iskar gas ɗin da ake shaka (ko cakuda) yayin aikin injin, sannan a koma cikin silinda don sake zagayawa don shiga cikin konewa. Ayyukansa shine rage fitar da NOx. NOx iskar gas ce mai cutarwa sosai ga jikin dan adam, wanda akasari ake samarwa a karkashin yanayin zafi mai yawa da kuma iskar oxygen. A lokacin aikin injin, idan an sake dawo da wani ɓangare na iskar gas a cikin silinda a daidai lokacin da ya dace, saboda babban ɓangaren iskar gas yana da ƙayyadaddun ƙayyadaddun ƙarfin zafi, CO2, iskar gas na iya ɗaukar sashi. na zafin da aka samu ta hanyar konewa da fitar da shi daga cikin silinda, kuma yana da tasiri mai kyau akan cakuda. Wani sakamako na dilution, don haka rage matsakaicin zafin jiki da abun ciki na oxygen na konewar injin, ta haka ne rage samuwar mahadi na NOx.
Sai dai sake zagayowar iskar gas da ya wuce kima zai yi tasiri kan yadda injin ke tafiyar da al'ada, musamman idan injin yana aiki da sauri, ƙarancin gudu da ƙarancin nauyi kuma injin ɗin yana gudana cikin yanayin sanyi, da kuma lokacin da ake buƙatar ƙarfin injin da cikakken nauyi. (cikakken matsi), iskar iskar gas mai sake zagaye zai yi tasiri sosai akan aikin injin. Sabili da haka, adadin iskar gas da ke shiga cikin sake zagayowar ya kamata a daidaita ta atomatik bisa ga ainihin yanayin aiki na injin da canje-canje a yanayin aiki. Aiki ya tabbatar da cewa, bisa ga tsarin injin daban-daban, adadin iskar gas da ke cikin sake zagayawa gabaɗaya ya bambanta tsakanin 6% zuwa 13%.
Don yin yawan sake zagayowar iskar iskar gas ɗin ba ta da tasiri mai yawa akan aikin injin, injinan sarrafa kayan lantarki na zamani suma sun ɗauki dabarun sarrafa madauki don sake sake fitar da iskar gas, kuma an shigar da firikwensin matsayi na EGR a madaidaicin iskar gas. bawul (wasu samfuran kuma suna amfani da na'urori masu auna zafin jiki). ko firikwensin matsa lamba), rufaffiyar madauki gyara ra'ayi mai kula da ainihin adadin sake zagayowar iskar gas ana aiwatar da shi. Wurin tafiye-tafiye na kasuwanci. Tsayin bene daga ƙasa yana da ƙasa, kuma yawan amfani da sararin samaniya shine mafi girma a tsakanin samfurori iri ɗaya, wanda shine 19% mafi girma fiye da na samfurori iri ɗaya; babban sarari
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