Kodi mungathe kusakaniza brake fluid?

Pakati pa mabuleki otsika mtengo, oimira awiri ndi omwe amapezeka kwambiri masiku ano: DOT-3 ndi DOT-4. Ndipo magalimoto ambiri omwe akuyenda m'misewu ya Russian Federation amafuna kugwiritsa ntchito mankhwalawa pama brake system. Kenako, tiwona ngati ndizotheka kusakaniza DOT-3 ndi DOT-4 brake fluid.

Kodi pali kusiyana kotani pakati pa DOT-3 ndi DOT-4 brake fluids?

Madzi onse omwe amaganiziridwa kuti ma brake amapangidwa pamaziko omwewo - ma glycols. Glycols ndi mowa wokhala ndi magulu awiri a hydroxyl. Izi zimatsimikizira kuthekera kwake kwakukulu kusakanikirana ndi madzi popanda kupanga mvula.

Ganizirani za kusiyana kwakukulu kwa ntchito.

1. Kutentha kutentha. Mwinamwake, kuchokera kumbali ya chitetezo, ichi ndi chizindikiro chofunika kwambiri. Nthawi zambiri mumapeza malingaliro olakwika otere pamaneti: madzimadzi a brake sangathe kuwira, chifukwa palibe magwero otentha otere mu dongosololi. Ndipo ma disks ndi ng'oma zili pamtunda wokwanira kuchokera ku mbano ndi masilindala kuti asamutsire kutentha kwa voliyumu yamadzimadzi. Panthawi imodzimodziyo, amathandizidwanso ndi mpweya wabwino chifukwa cha mafunde a mpweya. Ndipotu, kutentha sikumayambitsidwa ndi magwero akunja okha. Panthawi yogwira mabuleki, brake fluid imaponderezedwa ndi kukakamizidwa kwakukulu. Izi zimakhudzanso kutentha (chifaniziro chikhoza kujambulidwa ndi kutentha kwa volumetric hydraulics panthawi ya ntchito yaikulu). Madzi a DOT-3 amakhala ndi kuwira kwa +205 ° C.

1. M'munsi kuwira ponyowa. Madzi a DOT-3 adzawira ndi kudzikundikira kwa 3,5% chinyezi ndi voliyumu pa kutentha kwa +140 ° C. DOT-4 ndiyokhazikika pankhaniyi. Ndipo ndi gawo lomwelo la chinyezi, sichiphika popanda kudutsa chizindikiro cha + 155 ° C.
2. 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 kuti makinawo azigwira ntchito potentha kwambiri. DOT-3 ili ndi kukhuthala kotsika kwa kutentha kwa 1500 cSt. DOT-4 madzi ndi okhuthala ndipo ali ndi mamasukidwe akayendedwe pafupifupi 40 cSt pa -1800°C.

Zinadziwika kuti chifukwa cha zowonjezera za hydrophobic, DOT-4 yamadzimadzi imatenga madzi kuchokera ku chilengedwe pang'onopang'ono, ndiye kuti, imagwira ntchito 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 mwa izi 2% wamba zigawo zikuluzikulu, osachepera theka. Ndiko kuti, kusiyana kwa mankhwala enieni sikudutsa 1%. Zomwe zimapangidwira zowonjezera zimapangidwira m'njira yoti zigawozo zisalowe muzinthu zoopsa za mankhwala, zomwe zingayambitse kuchepa kwa ntchito yamadzimadzi.

Kutengera zomwe tafotokozazi, titha kunena momveka bwino: makina opangira DOT-3 amatha kudzazidwa ndi DOT-4.

Komabe, madzimadzi a DOT-3 ndi owopsa kwambiri pazigawo za mphira ndi pulasitiki. Choncho, ndi osafunika kudzaza mu machitidwe osasinthidwa. M'kupita kwa nthawi, izi zikhoza kufupikitsa moyo wa zigawo mabuleki dongosolo. Pankhaniyi, sipadzakhala zotsatira zoopsa. Kusakaniza kwa DOT-3 ndi DOT-4 sikungagwere pansi pa ntchito yotsika kwambiri pakati pa zakumwa ziwirizi.

Komanso samalani ndi kuyanjana kwamadzi ndi ABS. DOT-3, yomwe sinapangidwe kuti igwire ntchito ndi ABS, yayesedwa kuti igwire ntchito ndi anti-lock braking systems. Koma izi zidzakulitsa mwayi wolephera komanso kutayikira kudzera mu zisindikizo za valve block.