Ivyuma vy’ivyuma vy’ivyuma ni ubwoko busanzwe bw’ivyuma mu mashini. Ivyo vya mbere biri mu gishushanyo cabo kidasanzwe c’imiterere, ivyo bikaba bituma habaho uburinganire bwiza cane hagati y’umuzigo- ubushobozi bwo kubaga n’uguhinduranya.
Ivyuma bifatanya bishobora gushirwa mu mice itandukanye bishingiye ku mibumbe yavyo n’ibiranga ibikorwa vyavyo, harimwo n’ingingo z’umupira, iherezo- ihuriro ry’umupira, iforomaje{1}} ingingo z’ubwoko, ingingo z’isi yose, n’ibice vy’umubiri.
Muri ivyo, ingingo z’umupira ni zo zikunda gukoreshwa cane. Igishushanyo cabo ca mbere gifise igipfukisho c’umupira wo hanze, umupira w’amaguru wo mu mutima, n’ugutera umupira. Ubufatanye bw’ivyo bihimba bitatu bushika ku muzigo w’uburinganire-babare no guhindura ubushobozi bwo gukora ku nzira y’umubumbe.
Mu mashini, ivyuma bifatanya n’ibindi bikoresho bikoreshwa cane mu guhagarika amapine, uburyo bwo kugenzura moteri, n’ibikoresho vyo gutwara imodoka.
