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轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)機(ji)總成即轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)，又名轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)機(ji)、方向(xiang)(xiang)(xiang)機(ji)，它是轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)系中(zhong)最重要的(de)(de)部(bu)件。它的(de)(de)作用是：增(zeng)大轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)盤(pan)(pan)傳(chuan)到(dao)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)傳(chuan)動(dong)(dong)機(ji)構(gou)的(de)(de)力(li)和(he)改變力(li)的(de)(de)傳(chuan)遞方向(xiang)(xiang)(xiang)。轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)的(de)(de)操縱(zong)(zong)是全(quan)液(ye)(ye)壓式(shi)(shi)(shi)(shi)，也就是說(shuo)在(zai)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)柱和(he)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)輪(lun)之間沒有機(ji)械連接，在(zai)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)與(yu)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)油(you)缸之間是液(ye)(ye)壓管或軟管鏈接。當(dang)轉(zhuan)(zhuan)動(dong)(dong)方向(xiang)(xiang)(xiang)盤(pan)(pan)，轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)根據方向(xiang)(xiang)(xiang)盤(pan)(pan)轉(zhuan)(zhuan)動(dong)(dong)比例輸送相(xiang)對的(de)(de)油(you)量，該油(you)量直接流到(dao)操縱(zong)(zong)缸相(xiang)應一側，同時另一側的(de)(de)油(you)量回(hui)到(dao)油(you)箱。轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)按結構(gou)形式(shi)(shi)(shi)(shi)可(ke)分為(wei)：有齒(chi)輪(lun)齒(chi)條式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)、蝸(gua)桿(gan)曲柄(bing)指銷(xiao)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)、循(xun)環球-齒(chi)條齒(chi)扇式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)、循(xun)環球曲柄(bing)指銷(xiao)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)、蝸(gua)桿(gan)滾輪(lun)式(shi)(shi)(shi)(shi)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)等。按照助(zhu)力(li)形式(shi)(shi)(shi)(shi)又可(ke)以(yi)(yi)分：為(wei)機(ji)械式(shi)(shi)(shi)(shi)（無助(zhu)力(li)）轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)，和(he)動(dong)(dong)力(li)式(shi)(shi)(shi)(shi)（有助(zhu)力(li)）轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)兩種，其(qi)中(zhong)動(dong)(dong)力(li)轉(zhuan)(zhuan)向(xiang)(xiang)(xiang)器(qi)(qi)又可(ke)以(yi)(yi)分為(wei)氣壓動(dong)(dong)力(li)式(shi)(shi)(shi)(shi)、液(ye)(ye)壓動(dong)(dong)力(li)式(shi)(shi)(shi)(shi)、電動(dong)(dong)助(zhu)力(li)式(shi)(shi)(shi)(shi)、電液(ye)(ye)助(zhu)力(li)式(shi)(shi)(shi)(shi)等種類。
2018年3月，捷豹汽車(che)公布了其(qi)首款(kuan)純電動(dong)SUV的(de)量產版(ban)本I-Pace。該車(che)將(jiang)在2018年日(ri)內瓦車(che)展上亮相。
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