Raws li lub hauv paus nruab nrab ntawm lub tsheb hydraulic braking system, cov kua dej nres qhov kev ua haujlwm ncaj qha cuam tshuam rau kev nres nres thiab kev nyab xeeb ntawm kev tsav tsheb. Nrog rau kev siv sijhawm ntev, cov dej nres tau nqus dej noo, oxidation, thiab kev sib kis, ua rau txo qis ntawm qhov kub thiab txias, nce hauv viscosity, thiab ua kom cov hlau ua kom nrawm dua. Yog li ntawd, tsim kom muaj cov txheej txheem kev tshawb fawb thiab cov qauv kev sim yog qhov tseem ceeb rau kev tiv thaiv kev saib xyuas thiab kev tswj hwm kev pheej hmoo.
Cov txheej txheem kuaj feem ntau pib nrog kev tshuaj xyuas qhov muag thiab kuaj xyuas cov kua dej. Cov kws kho mob ua ntej pom qhov muag tshuaj xyuas cov xim thiab pob tshab ntawm cov dej nres hauv lub reservoir. Feem ntau, nws yuav tsum yog xim daj lossis daj ntseg. Tsaus xim av, pos huab, los yog muaj cov teeb meem raug tshem tawm feem ntau qhia tias muaj kab mob los yog kev puas tsuaj. Tib lub sijhawm, cov kua dej tau raug kuaj xyuas kom ntseeg tau tias nws nyob hauv qhov ntsuas ntsuas. Ib qib qis yuav qhia tau tias muaj dej los yog kev noj ntau dhau, yuav tsum tau tshawb xyuas tam sim ntawm lub kaw lus braking sealing.
Tom qab ntawd, kev ntsuam xyuas cov ntsiab lus dej tau ua, qhov ntsuas tseem ceeb rau kev ntsuas qhov thermal stability ntawm cov dej nres. Cov kev kuaj pom muaj xws li ntsuas dej noo (capacitive lossis resistive method) thiab Karl Fischer titration. Cov cuab yeej ntsuas capacitive suav cov ntsiab lus noo noo los ntawm kev ntsuas qhov hloov pauv hauv dielectric tas li ntawm cov kua. Txoj kev no yooj yim thiab ceev, haum rau ntawm - qhov kev tshuaj ntsuam thawj zaug. Cov txheej txheem titration muab ntau dua qhov tseeb thiab tuaj yeem txheeb xyuas qhov muaj pes tsawg leeg ntawm cov dej noo. Feem ntau, nws raug nquahu kom hloov DOT3 / DOT4 nres cov kua dej thaum cov dej ntau tshaj 3% kom tsis txhob vapor lock thaum lub sij hawm siab - kub braking, uas tuaj yeem ua rau txo qis los yog tsis ua haujlwm.
Qhov thib peb kauj ruam yog kev txiav txim siab kub hnyiab. Qhov kub npau npau qhuav (lub xeev tsis muaj dej) thiab ntub dej kub npau npau (muaj dej txaus) ntawm cov kua nres yog qhov tseem ceeb ntawm nws qhov kev tiv thaiv rau vapor xauv. Cov kev kuaj sim feem ntau siv Cleveland qhib khob txoj kev los yog barometric boiling point apparatus. Portable brake fluid testers kuj tseem siv tau rau kev ntsuas kwv yees ntawm -site. Yog tias qhov ntub dej npau npau qis dua tus qauv yuav tsum tau ua (piv txwv li, DOT4 ntub dej npau taw tes qis dua 155 degree), nws yuav tsum tau hloov tam sim ntawd kom tsis txhob vapor lock thaum lub sijhawm sib tsoo.
Roj hmab compatibility thiab pH tus nqi kuaj kuj tseem ceeb heev. Siv ib qho me me ntawm cov dej nres thiab tiv tauj nrog cov qauv roj hmab los ntawm lub twj tso kua mis nres thiab cov hoses rau ib lub sijhawm los soj ntsuam kev nthuav dav, softening, los yog tawg, yog li ntsuas cov khoom sib xws. Tus nqi pH ntsuas yog siv cov kua qaub-cov ntawv xeem ntawv lossis electrodes; qhov ib txwm muaj feem ntau ntawm 7.0 thiab 11.5. Ib me ntsis acidic pH qhia tau hais tias ceev oxidation thiab corrosion, yuav tsum tau hloov tam sim ntawd thiab tshawb xyuas ntawm qhov system corrosion.
Tom qab ua tiav qhov kev ntsuam xyuas physicochemical, kev ntsuam xyuas dav dav yuav tsum tau ua raws li lub tsheb lub hnub nyoog, mais, thiab kev ua haujlwm. Rau cov tsheb uas nquag ua rau cov khoom hnyav, tsav tsheb hauv roob siab, lossis siv nyob rau hauv qhov chaw siab - qhov kub thiab txias, lub voj voog ntsuas yuav tsum luv luv, thiab cov ntaub ntawv xeem yuav tsum raug tsim los pab txhawb kev tsom xam thiab kev txiav txim siab tu.
Zuag qhia tag nrho, cov txheej txheem ntsuas dej nres npog cov ntsiab lus tseem ceeb xws li qhov pom, qib dej, cov ntsiab lus dej, qhov kub thiab txias, roj hmab compatibility, thiab pH nqi. Los ntawm cov txheej txheem kev ua haujlwm thiab cov ntaub ntawv- tsav kev tswj hwm, cov teeb meem muaj peev xwm tuaj yeem txheeb xyuas tau sai, thiab hloov lub sijhawm ua kom zoo, muab kev lav zoo rau kev nyab xeeb thiab txhim khu kev lag luam ntawm lub nres nres.
