Cov pa luam yeeb dawb los ntawm cov kav dej hauv lub tsheb yog ib qho tshwm sim thiab tuaj yeem ua rau muaj teeb meem. Ua ntej tshaj plaws, thaum lub cav pib, yog tias muaj cov pa luam yeeb dawb tawm ntawm cov yeeb nkab tawm, nws txhais tau tias muaj qee yam txawv txav hauv qee qhov chaw. Ib qho ntawm qhov ua tau yog kev sib kis ntawm lub tshuab nqus tsev vacuum, uas ua rau cov cua tsis zoo, uas tuaj yeem cuam tshuam rau kev ua haujlwm ntawm lub cav. Nyob rau hauv rooj plaub no, nws yog ib qho tseem ceeb tshwj xeeb los ntxuav lossis hloov lub tshuab ntxhua khaub ncaws kom raws sijhawm.
Tsis tas li ntawd, muaj ntau cov pa luam yeeb dawb hauv qhov tso pa tawm, tshwj xeeb tshaj yog tias nws tseem nyob txawm tias tom qab qhov kub thiab txias, yuav qhia tau tias muaj teeb meem loj dua. Piv txwv li, kev puas tsuaj rau lub cav pistons, teeb meem kev sib tsoo, lossis cov roj tsis zoo tuaj yeem ua rau qhov tshwm sim no. Nyob rau hauv cov ntaub ntawv no, kev soj ntsuam thiab kho cov kws tshaj lij yuav tsum tau ua kom ntseeg tau tias lub tsheb ua haujlwm tau zoo.
Ntxiv rau cov laj thawj tseem ceeb no, nws tseem ceeb heev uas yuav tsum tau ua tib zoo saib xyuas lub sijhawm hloov pauv thiab qhov zoo ntawm cov coolant. Kev hloov pauv lossis siv cov dej txias tsis zoo rau lub sijhawm ntev yuav cuam tshuam rau lub cev kub ntawm lub tsheb, uas yuav ua rau cov pa taws dawb los ntawm cov pa tso pa tawm. Yog li ntawd, nws yog ib qho tseem ceeb los hloov lub coolant tsis tu ncua thiab xaiv cov khoom zoo.
