I-thermostat luhlobo lwesixhobo esilawula ubushushu ngokuzenzekelayo, esihlala siqulathe icandelo lokuva ubushushu, ngokwandisa okanye ukunciphisa ukuvula nokuvala ukuhamba kolwelo lokupholisa, oko kukuthi, ukulungisa ngokuzenzekelayo amanzi kwi-radiator ngokweqondo lobushushu lolwelo lokupholisa, ukutshintsha uluhlu lokujikeleza kolwelo lokupholisa, ukulungisa amandla okusasaza ubushushu kwinkqubo yokupholisa.
I-thermostat ephambili yenjini yi-thermostat yohlobo lwe-wax, elawulwa yiparafini ngaphakathi ngomgaqo wokwandiswa kobushushu kunye nokucotha kokubanda ukulawula ukujikeleza kwe-coolant. Xa ubushushu bokupholisa buphantsi kunexabiso elichaziweyo, iparafini ecociweyo emzimbeni we-thermostat oqonda ubushushu iqinile, ivalvu ye-thermostat phantsi kwesenzo sentwasahlobo ukuvala umjelo phakathi kwenjini kunye ne-radiator, i-coolant ngepompo yamanzi ukubuyela enjinini, umjikelo omncinci wenjini. Xa ubushushu be-coolant bufikelela kwixabiso elichaziweyo, iparafini iqala ukunyibilika kwaye kancinci kancinci ibe lulwelo, kwaye umthamo uyanda kwaye ucinezele ityhubhu yerabha ukuze inciphe. Kwangaxeshanye, ityhubhu yerabha iyancipha kwaye isebenzise ukutyhala phezulu kwinduku yokutyhala. Intonga yokutyhala inoxinzelelo olusezantsi kwivalvu ukwenza ivalvu ivuleke. Ngeli xesha, i-coolant idlula kwi-radiator kunye nevalvu ye-thermostat, ize ibuyele enjinini ngepompo yamanzi ukuze ijikeleze kakhulu. Uninzi lwe-thermostat lucwangciswe kumbhobho wokuphuma kwamanzi wentloko yesilinda, onenzuzo yesakhiwo esilula kwaye kulula ukukhupha amaqamza kwinkqubo yokupholisa; Ingxaki kukuba i-thermostat idla ngokuvula ivalwe xa isebenza, nto leyo ebangela ukuxinana.
Xa ubushushu bokusebenza kwenjini buphantsi (ngaphantsi kwama-70°C), i-thermostat ivala ngokuzenzekelayo indlela eya kwi-radiator, ize ivule indlela eya kwimpompo yamanzi. Amanzi okupholisa aphuma kwijakethi yamanzi angena ngqo kwimpompo yamanzi ngepayipi, aze athunyelwe kwijakethi yamanzi yimpompo yamanzi ukuze ijikeleze. Ngenxa yokuba amanzi okupholisa enganyamalali yi-radiator, ubushushu bokusebenza kwenjini bunokonyuswa ngokukhawuleza. Xa ubushushu bokusebenza kwenjini buphezulu (ngaphezu kwama-80°C), i-thermostat ivala ngokuzenzekelayo indlela eya kwimpompo yamanzi, ize ivule indlela eya kwi-radiator. Amanzi okupholisa aphuma kwijakethi yamanzi apholiswa yi-radiator aze athunyelwe kwijakethi yamanzi yimpompo yamanzi, nto leyo ephucula amandla okupholisa kwaye ithintele injini ekubeni itshise kakhulu. Le ndlela yomjikelo ibizwa ngokuba yi-large cycle. Xa ubushushu bokusebenza kwenjini buphakathi kwama-70°C nama-80°C, imijikelo emikhulu nemincinci ikhona ngaxeshanye, oko kukuthi, inxalenye yamanzi okupholisa kwimijikelo emikhulu, kunye nenye inxalenye yamanzi okupholisa kwimijikelo emincinci.
Umsebenzi we-thermostat yemoto kukuvala imoto ngaphambi kokuba ubushushu bufike kubushushu obuqhelekileyo. Ngeli xesha, ulwelo lokupholisa lwenjini lubuyiselwa enjinini ngepompo yamanzi, kwaye ukujikeleza okuncinci kwinjini kwenziwa ukuze injini ifudumale ngokukhawuleza. Xa ubushushu budlula obuqhelekileyo bunokuvulwa, ukuze ulwelo lokupholisa ludlule kwiradiator yetanki yonke ukuze kujikelezwe ubushushu obukhulu, ukuze kukhawuleziswe ukutshisa.
