Umbhobho we-exhaust muffler yinxalenye yenkqubo yokukhupha injini.Inkqubo yombhobho we-muffler exhaust ibandakanya ubukhulu becala, umbhobho wokukhupha kunye ne-muffler.Ngokubanzi, i-catalyst emithathu yokulinganisa ukulawula ukukhutshwa kwezinto ezingcolisa i-injini nayo ifakwe kwi-exhaust system.

Umbhobho wokukhupha ngokubanzi uquka umbhobho wokukhupha ngaphambili kunye nombhobho wokukhupha ngasemva.Emva kokuba umoya omtsha kunye nepetroli zixutywe kwi-injini yokutsha, ubushushu obuphezulu kunye neegesi ezinoxinzelelo oluphezulu zenziwe ukutyhala ipiston.Xa amandla egesi ekhutshwa, ayisenaxabiso kwi-injini.Ezi gesi ziba ziigesi zokukhupha kwaye zikhutshelwa ngaphandle kwe-injini.

Emva kokuphuma kwi-cylinder, igesi yokukhupha ingena kwi-manifold exhaust.Emva kokuba i-manifold yokukhutshwa kwe-cylinder nganye iqokelelwe, igesi yokukhupha ikhutshwa ngombhobho wokukhupha.