變(bian)(bian)速箱主(zhu)要指的是汽車的變(bian)(bian)速箱，它(ta)分為手動(dong)(dong)、自(zi)動(dong)(dong)兩種(zhong)，手動(dong)(dong)變(bian)(bian)速箱主(zhu)要由(you)(you)齒輪(lun)和軸組成，通過不同的齒輪(lun)組合(he)產生(sheng)變(bian)(bian)速變(bian)(bian)矩；而自(zi)動(dong)(dong)變(bian)(bian)速箱AT是由(you)(you)液(ye)力(li)變(bian)(bian)扭(niu)器、行星齒輪(lun)、液(ye)壓變(bian)(bian)距系統(tong)和液(ye)壓操縱系統(tong)組成。通過液(ye)力(li)傳(chuan)遞和齒輪(lun)組合(he)的方式來達(da)到變(bian)(bian)速變(bian)(bian)矩。