Inzwa yezwekazi yenza izinjini zedizili zihlanzeke
Abashayeli manje bazokwazi ngokuqinisekile ukuthi imoto yabo iyahlangabezana namazinga okukhishwa okuphoqelekile.
Ukwelashwa kwegesi ekhishwayo kubaluleke kakhulu ukuze kuncishiswe ukukhishwa okuyingozi okuvela ezimotweni.
Kanye nokunciphisa ukukhishwa kwe-carbon dioxide (CO2), ukunciphisa ama-nitrogen oxide ayingozi kungenye yezinselelo ezinkulu embonini yezimoto. Kungakho ngo-2011 umkhiqizi wamathayi waseJalimane nomhlinzeki wobuchwepheshe embonini yezimoto, i-Continental, esebenzela ukuthuthukiswa kohlelo lwe-Selective Catalytic Reduction (SCR).
Izimoto eziningi ezithwala udizili nezimoto ezihwebayo sezivele zifakwe lolu hlelo lwe-SCR. Kulobu buchwepheshe, isixazululo esinamanzi se-urea sihlangana nama-nitrogen oxides emagesini akhipha injini, futhi ngaleyo ndlela ama-nitrogen oxide ayingozi aguqulwa abe yi-nitrogen namanzi angenabungozi. Ukusebenza kwale nqubo kuncike esilinganisweni esinembile sezinga le-urea nokugxila. Kungenxa yokubaluleka kwalawa mamethrikhi okwenza i-Continental yethule inzwa ezinikele okokuqala ngqa ukusiza ukuthuthukisa ukusebenza kwamasistimu e-SCR nokulinganisa ukusebenza kwawo. Inzwa ye-urea ingakwazi ukukala ikhwalithi, izinga nezinga lokushisa lesisombululo se-urea ethangini. Idlanzana labakhiqizi bezimoto bahlela ukusebenzisa lobu buchwepheshe obusha be-Continental ezinhlelweni zabo.
“Ubuchwepheshe bethu be-urea sensor buhambisana nezinhlelo ze-SCR. Inzwa inikeza idatha esiza ukucolisa inani le-urea ejovwe ngokuhambisana nomthwalo wenjini wamanje. Le datha iyadingeka ukuze kuhlonzwe i-exhaust aftertreatment kanye namazinga e-urea yenjini ukuze usize umshayeli agcwalise i-AdBlue ngesikhathi esifanele,” kuchaza u-Kallus Howe, umqondisi wezinzwa nama-powertrains e-Continental. Ngaphansi kwezinga elisha lokukhishwa kwe-Euro 6 e, izimoto zikadizili kufanele zibe nesiguquli se-SCR esijovwe nge-urea, futhi ukuhlanganiswa kwenzwa entsha ye-Continental ohlelweni kuzokhulisa ukuzethemba komshayeli emisebenzini yokwelashwa ngemva kwemoto.
Inzwa emisha isebenzisa amasignali e-ultrasonic ukukala ukugcwala kwe-urea emanzini kanye nezinga likaphethiloli ethangini. Ngenxa yalokhu, inzwa ye-urea ingashiselelwa endaweni yokugcina amanzi noma kuyunithi yepompo.
Inani lesixazululo elijovwe kufanele libalwe ngokusekelwe ekulayisheni kwenjini ngaso leso sikhathi. Ukuze ubale ubuningi bomjovo obuqondile, okuqukethwe kwe-urea yangempela yesisombululo se-AdBlue (ikhwalithi yayo) kufanele kwaziwe. Futhi, isisombululo se-urea akufanele sibanda kakhulu. Ngakho-ke, ukuqinisekisa ukulungela njalo kwesistimu, kuyadingeka ukulawula izinga lokushisa ku-tank urea, uma kunesidingo, kusebenze uhlelo lokushisa. Okokugcina, kufanele kube nenani elanele le-urea ethangini njengoba inzwa ye-supersonic ivumela ukuthi izinga loketshezi ethangini lilinganiswe ngaphandle. Akuyona nje into eyinhloko yokumelana nesithwathwa, kodwa futhi ivimbela ukugqwala kwezakhi zezinzwa noma i-electronics.
Iseli lokulinganisa kunzwa liqukethe izakhi ezimbili ze-piezoceramic ezikhipha futhi zamukele amasignali e-Supersonic. Izinga nekhwalithi yesixazululo ingabalwa ngokulinganisa isikhathi sokuhamba esiqondile samagagasi aphakeme kakhulu ukuya endaweni ewuketshezi kanye nesivinini sawo esivundlile. Inzwa isebenzisa ikhono lamagagasi e-supersonic ukuhamba ngokushesha esixazululweni esinokuqukethwe okuphezulu kwe-urea.
Ukuze uthuthukise ukulinganisa ngisho nalapho imoto isendaweni ethambekele, isilinganiso sezinga lesibili sinikezwa ukunikeza isignali ethembekile emithambekeni ephezulu.
2020-08-30
