EGR kanjani EGT?

Kubashayeli abaningi bezimoto, i-exhaust gas recirculation, i-EGR (Recirculation Exhaust Gas Recirculation) kafushane, akuyona into entsha njengoba isezimotweni zabo. Kodwa-ke, akuwona wonke umuntu oqaphelayo ukuthi ngaphandle kokuxhumana ne-EGT (i-exhaust gas lokushisa) izinzwa, umsebenzi wawo oyinhloko ukulinganisa njalo izinga lokushisa lamagesi okukhipha umoya, akukwazanga ukusebenza kahle. Nakuba womabili ama-valve e-EGR nezinzwa ze-EGT zihlobene namagesi akhipha umoya, indima yawo ohlelweni ihlukile.

I-EGR - isebenza kanjani?

Ngamafuphi, umsebenzi wesistimu ye-EGR ukufaka amagesi okukhipha umoya emoyeni ongena kumasilinda, okunciphisa ukugcwala komoya-mpilo emoyeni owuthathayo futhi ngaleyo ndlela kunciphisa izinga lokuvutha. Kakhulu ngethiyori. Ngokwenza lokhu, le nqubo yenzeka ngendlela yokuthi amagesi aphumayo afakwe emoyeni wokungenisa umoya nge-valve ye-exhaust gas recirculation (EGR) etholakala esiteshini phakathi kwama-manifolds okungenisa nokukhipha. Uma injini isebenza kulokho okwaziwa ngokuthi yi-idling, i-valve ye-EGR iyavalwa. Ivula kuphela ngemva kokufudumala kwedrayivu, okungukuthi lapho izinga lokushisa lomlilo likhuphuka. Yiziphi izinzuzo ezithile zokusebenzisa uhlelo lwe-EGR? Ngenxa ye-EGR, igesi yokukhipha igesi ihlanzekile kunezixazululo ezivamile (ngisho nalapho injini isebenza kancane), ikakhulukazi, sikhuluma ngokunciphisa ama-nitrogen oxides ayingozi kakhulu.

Kungani injini inyakaza?

Ngeshwa, amasistimu e-EGR asengozini enkulu yokulimala. I-sediment efakwe ngaphakathi ngokuvamile iyimbangela yokusebenza okungalungile. Ngenxa yalokho, i-valve ayivuli noma ivale ngendlela efanele, noma, okubi nakakhulu, ivinjwe ngokuphelele. Ukungasebenzi kahle kwesistimu ye-exhaust gas recirculation kungazibonakalisa, kufaka phakathi "I-Jerking" ngenkathi ushayela, ukuqala okunzima kwenjini noma ukungalungi kwayo. Ngakho-ke senzani lapho sithola ukulimala kwe-valve ye-EGR? Esimweni esinjalo, ungase ulingeke ukuba uwuhlanze kumle onqwabelene. Kodwa-ke, ngokusho kochwepheshe, lesi akusona isisombululo esihle kakhulu, ngoba kunengozi yangempela yokungcola okuqinile okungena injini phakathi nalokhu kusebenza. Ngakho-ke, isixazululo esinengqondo kakhulu kungaba ukufaka ivalve ye-EGR esikhundleni esisha. Qaphela! Kufanele ilinganiswe ngokuqhathaniswa neyokuqala.

Izinga lokushisa ngaphansi kokuqapha (unomphela).

Ukulinganisa okunembile kwezinga lokushisa legesi ephumayo kubalulekile ekusebenzeni kahle kohlelo lwe-EGR. Ngalesi sizathu, izinzwa zokushisa kwegesi ephumayo zifakwa phezulu nomfula we-catalytic converter futhi ngokuvamile ziphinde zibe phezulu nomfula wesihlungi se-diesel particulate (DPF). Badlulisela ulwazi kusilawuli semoto, lapho siguqulwa sibe isignali efanele elawula ukusebenza kwalokhu kushayela. Ngenxa yalokhu, inani likaphethiloli oxubile elinikezwa amasilinda lingalawuleka ukuze isiguquli se-catalytic kanye nesihlungi se-diesel particulate zisebenze kahle ngangokunokwenzeka. Ngakolunye uhlangothi, ukuqapha okuqhubekayo kwezinga lokushisa kwegesi ephumayo kuvikela i-catalyst nesihlungi ngokuvimbela ukushisa nokugqoka ngokweqile.

Uma i-EGT ihluleka...

Njengama-valve e-EGR, izinzwa ze-EGT nazo zilimala ngezindlela ezahlukene. Njengomphumela wokudlidliza ngokweqile, kungase, phakathi kwezinye izinto, kulimaze uxhumo lwezintambo zangaphakathi noma kulimaze izintambo eziholela kunzwa. Ngenxa yomonakalo, ukusetshenziswa kukaphethiloli kuyanda, futhi ezimweni ezimbi kakhulu, i-catalyst noma i-DPF iyalimala. Kubasebenzisi bezimoto ezifakwe izinzwa ze-EGT, kunezinye izindaba ezingajabulisi: azilungiseki, okusho ukuthi uma kwenzeka ukwehluleka kufanele kushintshwe ezintsha.