Faka kanye nokukhipha izici ze-vacuum booster. Kukhona iphuzu lokuphambuka kwijika ngalinye elihambisana nama-vacuum degree ahlukile kulesi sibalo, elibizwa ngokuthi yi-Maximum Power Assist Point, okungukuthi, iphuzu umehluko wokuhlola osebenza ku-servo diaphragm ufinyelela phezulu njengoba amandla okufaka enyuka. Ukusuka kuleli phuzu kuqhubeke, ukwanda kwamandla okuphuma kulingana nokwanda kwamandla wokufaka.
Ngokwe-QC / T3079-1999 "izimo zobuchwepheshe ze-vacuum booster", i-vacuum degree yomthombo we-vacuum ngesikhathi sokuhlolwa ngu-66.7 ± 1.3kpa (500 ± 10mmHHG). Izici zokufaka nokukhipha ze-vacuum booster zinqunywa kuqala yindlela yokubala. Ngokusho komgomo osebenzayo we-vacuum booster, amapharamitha amabili alingiswa kwijika lemifanekiso angalinganiswa: amandla okufaka ahambelana nephuzu lamandla aphezulu nesamba; Isilinganiso sokuphuma kwamandla okukhipha kumandla okufaka ngaphambi kwephuzu lamandla aphezulu, okungukuthi isilinganiso samandla
