Kwiinjini ezininzi zemveliso, i ezininzi yindibano eyenzelwe ukuqokelela irhasi yokukhupha iisilinda ezimbini okanye ngaphezulu kumbhobho omnye. Iimanifolds zihlala zenziwe ngentsimbi etyhidiweyo kwiimoto zokuvelisa isitokhwe, kwaye zinokuba neempawu zoyilo ezonga izinto ezifana nokusebenzisa eyona ntsimbi incinci, ukuhlala esona sithuba sincinci siyimfuneko, okanye ukuba nelona xabiso liphantsi lokuvelisa. Ezi zithintelo zoyilo zihlala zikhokelela kuyilo olunexabiso eliphantsi kodwa olungenzi owona msebenzi usebenzayo wokukhupha iigesi enjinini. Ukungasebenzi kakuhle kwenzeka ngenxa yobume benjini yokutsha kunye neesilinda zayo. Ekubeni iisilinda zivutha ngamaxesha ahlukeneyo, i-exhaust iwashiya ngamaxesha ahlukeneyo, kwaye amaza oxinzelelo kwigesi ephuma kwi-cylinder enye ayinakuphuma ngokupheleleyo kwi-exhaust system xa kufika enye. Oku kudala uxinzelelo lwasemva kunye nomda kwi-injini yokukhupha i-injini enokuthi ithintele amathuba okwenene okusebenza kwe-injini.
Nokuba zeziphi iimpawu ezingalunganga ezigxininiswe kubathengisi abanokubakho bemibhobho yentsimbi yokukhupha ulungelelwaniso, iinjineli eziyila iinxalenye zenjini zikhetha iindlela eziqhelekileyo zokukhupha intsimbi yokukhupha intsimbi zinokudwelisa ngokufanayo iimpawu ezintle, ezifana noluhlu lweempawu zolawulo lobushushu kunye nobude obude kunalo naluphi na olunye uhlobo uyilo lwe-exhaust outlet. Kumthengi oqhelekileyo, ukuba nengxaki nayo nayiphi na indawo yokukhupha isenokufaneleka ‘njengentsebenzo ephantsi’.
A okuphezulu luninzi oluyilelwe ngokuthe ngqo ukusebenza.[1] Ngexesha loyilo, iinjineli zenza a ezininzi ngaphandle kokujonga ubunzima okanye indleko kodwa endaweni yoko ukuhamba kakuhle kweegesi zokukhupha. Olu yilo luphumela kwiheader esebenza ngakumbi ukuhlamba ukukhupha kwiisilinda. Iiheader ngokuqhelekileyo ziyityhubhu yentsimbi ejikelezayo enokugoba kunye nokugoba okubalwe ukwenza iindlela ukusuka kwizibuko lokukhupha le-cylinder nganye ukuya kwindawo yokuphuma eqhelekileyo yonke ubude obulinganayo, kwaye idityaniswe kwii-engile ezimxinwa ukukhuthaza amaza oxinzelelo ukuba ahambe kwindawo yokuphuma, kwaye angabuyi ngasemva ukuya kwezinye iisilinda. Kwiseti ye lungisa izihloko ubude bombhobho bubalwe ngononophelo ukunyusa ukuhamba kwe-exhaust kuluhlu oluthile lwe-injini ngomzuzu (RPM) .