Kodi madontho 3 ndi dontho 4 angasakanizidwe ndi mabuleki?
Zamkatimu
Kodi pali kusiyana kotani pakati pa DOT-3 ndi DOT-4 brake fluids?
Zonse zomwe zimaganiziridwa kuti mabuleki amapangidwa pamaziko omwewo: glycols. Glycols ndi mowa wokhala ndi magulu awiri a hydroxyl. Izi zimatsimikizira kuthekera kwawo kwakukulu kusakanikirana ndi madzi popanda mvula.
Tiyeni tiwone kusiyana kwakukulu kwa magwiridwe antchito.
- Kutentha kutentha. Mwinamwake, ponena za chitetezo, ichi ndi chizindikiro chofunika kwambiri. Nthawi zambiri mumapeza malingaliro olakwika otere pa intaneti: madzimadzi a brake sangathe kuwira, chifukwa kwenikweni palibe magwero otentha otenthetsera mu dongosolo. Ndipo ma discs ndi ng'oma zili patali kwambiri kuchokera ku ma calipers ndi masilindala kuti asamutsire kutentha kwa voliyumu yamadzimadzi. Panthawi imodzimodziyo, amathandizidwanso ndi mpweya wodutsa. Ndipotu, kutentha sikumayambitsidwa ndi magwero akunja okha. Panthawi yogwira mabuleki, brake fluid imaponderezedwa kwambiri. Izi zimakhudzanso kutentha (chifaniziro chikhoza kujambulidwa ndi kutentha kwa volumetric hydraulics panthawi ya ntchito yaikulu). Madzi a DOT-3 amatha kuwira +205 ° C. DOT-4 ili ndi kuwira kwapamwamba pang'ono: +230°C. Ndiye kuti, DOT-4 imalimbana kwambiri ndi kutentha.
- Ikani pamalo otentha pamene mwanyowa. Madzi a DOT-3 amawira pambuyo pa kudzikundikira kwa 3,5% chinyezi mu voliyumu pa kutentha kwa +140 ° C. DOT-4 ndiyokhazikika pankhaniyi. Ndipo ndi gawo lomwelo la chinyezi, silidzaphika kale kuposa litadutsa chizindikiro cha + 155 ° С
- Viscosity pa -40 ° C. Chizindikiro cha zakumwa zonse chimayikidwa ndi muyezo wapano pamlingo wosapitilira 1800 cSt. Kinematic mamasukidwe akayendedwe amakhudza otsika kutentha katundu. Madziwo akachuluka, m'pamenenso zimakhala zovuta kwambiri kuti makinawo azigwira ntchito potentha kwambiri. DOT-3 ili ndi kukhuthala kotsika kwa kutentha kwa 1500 cSt. Madzi a DOT-4 ndi okhuthala, ndipo pa -40 ° С ali ndi kukhuthala kwa pafupifupi 1800 cSt.
Zimadziwika kuti chifukwa cha zowonjezera za hydrophobic, madzi a DOT-4 amatenga madzi kuchokera ku chilengedwe pang'onopang'ono, ndiye kuti amatenga nthawi yayitali.
Kodi DOT-3 ndi DOT-4 angasakanizidwe?
Apa tikuwona kuyanjana kwa mankhwala amadzimadzi. Popanda kulowa mwatsatanetsatane, titha kunena izi: zakumwa zonse zomwe zikufunsidwa ndi 98% glycols. 2% yotsalayo imachokera ku zowonjezera. Ndipo izi 2% ya zigawo wamba, osachepera theka. Ndiko kuti, kusiyana kwa mankhwala enieni sikudutsa 1%. Zomwe zimapangidwira zowonjezera zimaganiziridwa m'njira yakuti zigawozo zisalowe muzinthu zoopsa za mankhwala, zomwe zingayambitse kuchepa kwa ntchito yamadzimadzi.
Kutengera zomwe tafotokozazi, titha kunena momveka bwino: mutha kuthira DOT-4 mosamala mudongosolo lopangidwira DOT-3.
Komabe, madzi a DOT-3 amakhala ankhanza kwambiri ku mphira ndi pulasitiki. Choncho, ndi osafunika kutsanulira mu unasinthidwa kachitidwe. M'kupita kwa nthawi, izi zikhoza kuchepetsa moyo wa zigawo zikuluzikulu za dongosolo brake. Pankhaniyi, sipadzakhala zotsatira zoopsa. Chisakanizo cha DOT-3 ndi DOT-4 sichingagwere m'machitidwe ocheperako kuposa ang'onoang'ono azizindikiro pakati pazamadzimadzi awiriwa.
Komanso samalani ndi kuyanjana kwamadzi ndi ABS. Zatsimikiziridwa kuti DOT-3, yomwe sinapangidwe kuti igwire ntchito ndi ABS, idzagwira ntchito ndi anti-lock braking system. Koma mwayi wolephera ndi kutayikira kudzera mu zisindikizo za valve block udzawonjezeka.
