EGR cooler ke sesebelisoa se sebelisetsoang ho fokotsa likhase tse tsoang lienjiniking tse tukang ka hare, tse sebetsang ka ho fokotsa tlhahiso ea li-nitrogen oxides (NOx) ka mokhoa oa ho qeta khase ea exhaust (EGR), moo likhase tsa exhaust li pholileng ebe li khutlisetsoa ho enjene bakeng sa ho tuka.
Pholiso ea EGR hangata e na le mochini o futhumatsang mocheso oo likhase tsa mouoane, hang ha li ntšoa phaepheng ea enjist, li fapanyetsanoang ka mochini o pholileng (hangata ke metsi a pholileng a enjine kapa moea) ho theola mocheso oa likhase tse tsoang. Ho fokotsa mocheso oa khase ea ho qeta mocheso ho thusa ho fokotsa tlhahiso ea NOx, e khothalletsoang ke maemo a phahameng a mocheso.
Ka ho sebetsa le pholileng ea EGR, enjene e ka fokotsa tlhahiso ea NOx ho isa bohōleng bo itseng, kahoo e lumellana le litekanyetso tsa tlhahiso ea tikoloho. Ka nako e ts'oanang, pholile ea EGR e boetse e thusa ho ntlafatsa bokhoni ba ho tuka ha enjene le ho fokotsa tšebeliso ea mafura.
Li-coolers tsa EGR tsa likoloi tsa khoebo, Re fana ka lisebelisoa tsa boleng bo holimo bakeng sa li-coolers tsa EGR (liphaposi tse kenang le tsa ho tsoa, likamore tsa ho kena le tsa ho tsoa).
Likarolo tsa rona (kamore ea khase) ka har'a pholileng eohle ea EGR e phetha karolo ea ho hokahanya, lehlakore la ventilation le sebelisetsoa ho hokahanya khase ea ho qeta ka lesoba le chitja bakeng sa ho kenngoa ha valve ea EGR, ho sebetsana le sebaka se sephara ka mokhoa oohle oa ho kopanya ho phetha karolo ea ho tiisa; square port ka brazing e phahameng ea mocheso e amanang le khetla; thepa ke ZG08Cr18Ni9, thepa ha e na kutu, e hanyetsa mocheso o phahameng, e thusang ho ntlafatsa bophelo ba litšebeletso tsa likarolo.
Re ka fana ka likarolo tsena ka libopeho tse fapaneng ho latela litlhoko tsa moreki.