Ungakwazi yini ukuxuba i-brake fluid?

Phakathi kwama-brake fluids angabizi kakhulu, abameleli ababili bavame kakhulu namuhla: i-DOT-3 ne-DOT-4. Futhi iningi lezimoto ezihamba emigwaqweni yaseRussian Federation zidinga ukusetshenziswa kwalezi zinhlanganisela ohlelweni lwamabhuleki. Okulandelayo, sizothola ukuthi kungenzeka yini ukuxuba i-DOT-3 ne-DOT-4 brake fluid.

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 layo eliphezulu lokuhlangana namanzi ngaphandle kokwakheka kwemvula.

Cabangela umehluko omkhulu wokusebenza.

1. Izinga lokushisa elibilayo. Mhlawumbe, ngokombono wokuphepha, lokhu kuyinkomba ebaluleke kakhulu. Ngokuvamile ungathola umbono oyiphutha onjalo kunethiwekhi: i-brake fluid ayikwazi ukubilisa, ngoba ayikho imithombo yokushisa eshisayo ohlelweni ngokusemthethweni. Futhi ama-disks nezigubhu zisebangeni elikhulu ngokwanele ukusuka kumathongo namasilinda ukudlulisa izinga lokushisa kumthamo we-liquid. Ngesikhathi esifanayo, zibuye zifakwe umoya ngenxa yokudlula kwemisinga yomoya. Eqinisweni, ukushisa akubangelwa kuphela imithombo yangaphandle. Ngesikhathi sokubhuleka okusebenzayo, i-brake fluid icindezelwa ngomfutho omkhulu. Lesi sici siphinde sithinte ukushisa (isifaniso singadonswa ngokushisa kwe-volumetric hydraulics ngesikhathi sokusebenza kanzima). I-Liquid DOT-3 inephuzu lokubilisa elingu-+205°C.

1. Iphuzu eliphansi lokubilisa lapho limanzi. Uketshezi lwe-DOT-3 luzobilisa ngokunqwabelana komswakama ongu-3,5% ngevolumu ezingeni lokushisa elingu-+140°C. I-DOT-4 izinzile kakhulu kulokhu. Futhi ngenani elifanayo lomswakama, ngeke libilise ngaphandle kokudlulisa uphawu luka + 155 ° C.
2. 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 ine-viscosity engaba ngu-40 cSt ku--1800 ° С.

Kwaphawulwa ukuthi ngenxa yezithako ze-hydrophobic, uketshezi lwe-DOT-4 ludonsa amanzi emvelweni kancane kancane, okungukuthi, lusebenza isikhathi eside.

Ingabe i-DOT-3 ne-DOT-4 ingaxutshwa?

Lapha sicabangela ukuhambisana kokwakheka kwamakhemikhali oketshezi. Ngaphandle kokungena emininingwaneni, singasho lokhu: zombili iziphuzo okukhulunywa ngazo zingama-98% glycols. U-2% osele uvela ezithasiselweni. Futhi kulezi zi-2% zezingxenye ezivamile, okungenani isigamu. Okungukuthi, umehluko ekubunjweni kwamakhemikhali wangempela aweqi i-1%. Ukwakheka kwezithasiselo kwakhiwa ngendlela yokuthi izingxenye zingangeni ekuphenduleni kwamakhemikhali okuyingozi, okungase kubangele ukwehla kokusebenza koketshezi.

Ngokusekelwe kulokhu okungenhla, singafinyelela isiphetho esicacile: isistimu eyakhelwe i-DOT-3 ingagcwaliswa ngokuphephile nge-DOT-4.

Kodwa-ke, uketshezi lwe-DOT-3 lunolaka kakhulu ezingxenyeni zenjoloba nepulasitiki. Ngakho-ke, akuthandeki ukuyithela ezinhlelweni ezingaguquki. Ngokuhamba kwesikhathi, lokhu kunganciphisa ukuphila kwezingxenye zesistimu yamabhuleki. Kulokhu, ngeke kube nemiphumela enzima. Ingxube ye-DOT-3 ne-DOT-4 ngeke ibe ngaphansi kokusebenza okuphansi phakathi kwalezi ziphuzo ezimbili.

Naka futhi ukuhambisana koketshezi ne-ABS. I-DOT-3, engaklanyelwe ukusebenza ne-ABS, ihlolelwe ukusebenza nama-anti-lock braking systems. Kodwa lokhu kuzokwandisa amathuba okwehluleka kanye nokuvuza ngokusebenzisa ama-valve block seal.