Bumper ine basa rekuchengetedza kuchengetedza, kushongedza uye kugadzirisa aerodynamic hunhu hwemotokari. Kubva pakuchengetedzeka kwekuona, mota inogona kuita basa rebuffer pakaitika tsaona yakaderera yekudhumhana, kuchengetedza kumberi uye kumashure kwemota yemotokari; Kana pakaitika tsaona nevanofamba netsoka vanogona kuita chimwe chikamu mukudzivirira vanofamba netsoka. Kubva pakuonekwa, inoshongedza uye inova chikamu chinokosha chekushongedza motokari kuonekwa. Panguva imwecheteyo, mabhampa emotokari anewo imwe aerodynamic effect.
Panguva imwecheteyo, kuitira kuderedza kukuvadzwa kwevari mukati munyaya yetsaona dzeparutivi, motokari dzinowanzogadzirirwa mabhampa emagonhi kuti awedzere simba rekudzivirira-kuroverana kwemagonhi. Iyi nzira inoshanda, iri nyore, shanduko shoma kune chimiro chemuviri, yakashandiswa zvakanyanya. Kare muna 1993 Shenzhen International Automobile Exhibition, gonhi remotokari rakavhurwa kuti ribudise bumper kuti vateereri vaone, kuratidza kushanda kwayo kwakanaka kwekuchengetedza.
Kuiswa kwegonhi bhampa kuri mumusuwo wega wega weplate remusuwo wakachinjika kana oblique akati wandei akakwira simba simbi simbi, tamba chinzvimbo chemota kumberi kwemota kumashure bumper, kuitira kuti mota yese yakatenderedza bumper "protection", ichigadzira "iron". wall", kuitira kuti mugari wemotokari ave nepamusoro pekuchengetedza nzvimbo. Zvechokwadi, kuiswa kwemasuo akadaro pasina mubvunzo kuchawedzera mamwe mari kune vanogadzira motokari, asi kune vanogara mumotokari, kuchengeteka uye pfungwa yekuchengeteka ichawedzera zvakanyanya.
