Ibhampa inemisebenzi yokuvikela ukuphepha, ukuhlobisa imoto nokuthuthukisa izici ze-aerodynamic zemoto. Ngokuphathelene nokuphepha, imoto ingadlala indima ye-buffer uma kwenzeka ingozi yesivinini esiphansi futhi ivikele umzimba wangaphambili nowangemuva; Ingavikela abahamba ngezinyawo uma kwenzeka ingozi kubahamba ngezinyawo. Ngokuphathelene nokubukeka, iyahlobisa futhi isibe yingxenye ebalulekile yokuhlobisa ukubukeka kwezimoto; Ngesikhathi esifanayo, ibhampa yemoto nayo inomphumela othile we-aerodynamic.
Ngesikhathi esifanayo, ukuze kuncishiswe ukulimala kwabagibeli uma kwenzeka ingozi yokulimala eceleni, kuvame ukufakwa i-bumper yomnyango emotweni ukuze kuthuthukiswe amandla okumelana nokushayisana komnyango. Le ndlela iyasebenza futhi ilula, ayinalo ushintsho olukhulu esakhiweni somzimba, futhi ibilokhu isetshenziswa kabanzi. Kudala nje eShenzhen International Automobile Exhibition ka-1993, iHonda Accord yavula ingxenye yomnyango ukuze iveze i-bumper yomnyango ezilalelini ukuze ibonise ukusebenza kwayo okuhle kokuphepha.
Ukufakwa kwebhampa yomnyango ukufaka imishayo yensimbi eminingana enamandla aphezulu ngokuvundlile noma ngokugobile ephaneli yomnyango womnyango ngamunye, odlala indima yebhampa yangaphambili neyangemuva, ukuze yonke imoto "iphelekezelwe" ngamabhampa ngaphambili, ngemuva, kwesobunxele nakwesokudla, okwakha "udonga lwethusi nodonga lwensimbi", ukuze abagibeli bemoto babe nendawo yokuphepha ephezulu. Vele, ukufaka lolu hlobo lwebhampa yomnyango ngokungangabazeki kuzokhulisa ezinye izindleko kubakhiqizi bezimoto, kodwa kubagibeli bezimoto, ukuphepha nomuzwa wokuphepha kuzokhula kakhulu.
