Akwai abubuwa guda biyu a cikin akwatin kofin mota, ɗaya shine tanki na iska, wanda ya fara aiki da iska, iska a cikin iska mai ɗumi, tana fitar da daskararrun iska
Kwalin kofin mota shine injin ɗin mota da injin mothar ruwa. Aikin kwalin cirewar motoci na iska shine don sake canjin kayan aiki daga ruwa zuwa gas (watau ruwa da ke kewaye, sannan kuma matsi mai zafi), yana ɗaukar zafi da yawa), shan zafi mai ƙarancin zafi a cikin zazzabi. A lokacin bazara don samar da yanayi mai gamsarwa ga mazaunan, rage karfin dills, inganta amincin tuƙi