Ingabe ichashazi 3 kanye nechashazi 4 lamabhuleki angaxutshwa?
Okuqukethwe
Uyini umehluko phakathi kwe-DOT-3 ne-DOT-4 brake fluids?
Zombili izinto ezithathwa njengamabhuleki zenziwe ngesisekelo esifanayo: ama-glycols. Ama-Glycols ama-alcohols anamaqembu amabili e-hydroxyl. Lokhu kunquma ikhono lawo eliphezulu lokuhlangana namanzi ngaphandle kwemvula.
Ake sibheke umehluko omkhulu wokusebenza.
- Izinga lokushisa elibilayo. Mhlawumbe, mayelana nokuphepha, lokhu kuyinkomba ebaluleke kakhulu. Ngokuvamile ungathola umbono oyiphutha onjalo kunethiwekhi: i-brake fluid ayikwazi ukubilisa, ngoba empeleni ayikho imithombo enjalo yokushisa yokushisa ohlelweni. Futhi ama-discs nezigubhu zisebangeni elikhulu kakhulu ukusuka kuma-calipers namasilinda ukuze kudluliselwe izinga lokushisa kumthamo we-liquid. Ngesikhathi esifanayo, zibuye zifakwe umoya ngokugeleza komoya odlulayo. Eqinisweni, ukushisa akubangelwa kuphela imithombo yangaphandle. Ngesikhathi sokubhuleka okusebenzayo, i-brake fluid icindezelwa ngengcindezi enkulu. Lesi sici siphinde sithinte ukushisa (isifaniso singadonswa ngokushisa kwe-volumetric hydraulics ngesikhathi sokusebenza kanzima). I-liquid DOT-3 inephuzu lokubilisa elingu-+205°C. I-DOT-4 inephuzu lokubila elingaphezulu kancane: +230°C. Okusho ukuthi, i-DOT-4 imelana kakhulu nokushisa.
- Yehla endaweni yokubilisa uma kuswakanyiswe. Uketshezi lwe-DOT-3 luzobilisa ngemva kokunqwabelana komswakama ongu-3,5% kuvolumu ekushiseni kuka +140°C. I-DOT-4 izinzile kakhulu kulokhu. Futhi ngenani elifanayo lomswakama, ngeke ubilise ngaphambi kokudlula uphawu luka + 155 ° С.
- Viscosity at -40°C. Le nkomba yazo zonke izinto eziwuketshezi isethwe yizinga lamanje ezingeni elingekho ngaphezu kuka-1800 cSt. I-kinematic viscosity ithinta izakhiwo zokushisa eziphansi. Uma uketshezi lushubile, kuba nzima nakakhulu ukuthi uhlelo lusebenze emazingeni okushisa aphansi. I-DOT-3 ine-viscosity yokushisa ephansi engu-1500 cSt. I-DOT-4 liquid ishubile, futhi ku-40 ° С ine-viscosity engaba ngu-1800 cSt.
Kuyaphawulwa ukuthi ngenxa yezithako ze-hydrophobic, uketshezi lwe-DOT-4 lumunca amanzi emvelweni kancane kancane, okungukuthi, luhlala isikhathi eside.
Ingabe i-DOT-3 ne-DOT-4 ingaxutshwa?
Lapha sibheka ukuhambisana kokwakheka kwamakhemikhali oketshezi. Ngaphandle kokungena emininingwaneni, singasho lokhu: zombili iziphuzo okukhulunywa ngazo zingama-98% glycols. U-2% osele uvela ezithasiselweni. Futhi kulawa 2% wezingxenye ezivamile, okungenani isigamu. Okungukuthi, umehluko ekubunjweni kwamakhemikhali wangempela aweqi i-1%. Ukwakheka kwezithasiselo kucatshangelwa ngendlela yokuthi izingxenye zingangeni ekuphenduleni kwamakhemikhali okuyingozi, okungase kubangele ukuncipha kokusebenza koketshezi.
Ngokusekelwe kulokhu osekushiwo ngaphambili, singafinyelela isiphetho esicacile: ungakwazi ukuthela ngokuphepha i-DOT-4 ohlelweni oluklanyelwe i-DOT-3.
Kodwa-ke, uketshezi lwe-DOT-3 lunolaka kakhulu ezingxenyeni zenjoloba nepulasitiki. Ngakho-ke, akuthandeki ukuyithela ezinhlelweni ezingashintshiwe. Ngokuhamba kwesikhathi, lokhu kunganciphisa impilo yezingxenye zesistimu yokubhuleka. Kulokhu, ngeke kube nemiphumela enzima. Ingxube ye-DOT-3 ne-DOT-4 ngeke ihlehle ngokuya ngezakhiwo zokusebenza ezingaphansi kwezincane zezinkomba phakathi kwalezi ziphuzo ezimbili.
Naka futhi ukuhambisana koketshezi ne-ABS. Sekuqinisekisiwe ukuthi i-DOT-3, engaklanyelwe ukusebenza ne-ABS, izosebenza ne-anti-lock braking system. Kodwa amathuba okuhluleka nokuvuza ngokusebenzisa izimpawu ze-valve block azokhula.
