REXROTH比例(li)閥當左(zuo)側(ce)受(shou)力(li)大于右側(ce)受(shou)力(li)與(yu)感載彈簧預緊力(li)之和(he)時（此時的壓力(li)為Ps）,活塞(sai)不斷(duan)右移(yi),后使閥門與(yu)閥座接觸而關閉,將輸入(ru)輸出(chu)油(you)路隔絕,達到平(ping)衡狀態(tai)。P1若進一(yi)步升高時,則活塞(sai)左(zuo)移(yi),閥門再度打開(kai),制(zhi)動液流入(ru)出(chu)油(you)口,使P2也升高。

  德國(guo)rexroth比(bi)例(li)閥的(de)輸(shu)(shu)(shu)(shu)入(ru)(ru)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)為零.即(ji).;時(shi)(shi)(shi)(shi),輸(shu)(shu)(shu)(shu)出腔的(de)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)通(tong)過(guo)比(bi)例(li)閥皮圈凸筋間(jian)空酸從(cong)唇口(kou)泄(xie)去高(gao)(gao)壓(ya)(ya)(ya)(ya)(ya)(ya),同(tong)時(shi)(shi)(shi)(shi),當比(bi)例(li)閥芯(xin)所(suo)受(shou)的(de)彈(dan)簧力(li)(li)大于向右的(de)液壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)時(shi)(shi)(shi)(shi),比(bi)例(li)閥彈(dan)簧將比(bi)例(li)閥芯(xin)推回原始位置(zhi),使(shi)(shi)比(bi)例(li)閥芯(xin)與比(bi)例(li)閥皮圈內(nei)孔*分離(li)而*泄(xie)壓(ya)(ya)(ya)(ya)(ya)(ya).此時(shi)(shi)(shi)(shi)輸(shu)(shu)(shu)(shu)入(ru)(ru)輸(shu)(shu)(shu)(shu)出壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)為零.隨著輸(shu)(shu)(shu)(shu)入(ru)(ru)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li).增大,即(ji)左增大,使(shi)(shi)比(bi)例(li)滑閥單(dan)向力(li)(li)平衡遭破壞.當<>&;6-時(shi)(shi)(shi)(shi),比(bi)例(li)閥芯(xin)左移與比(bi)例(li)閥皮圈產生(sheng)間(jian)隙形(xing)成(cheng)節流并混合(he)比(bi)倒閥常見的(de)故障為:1,輸(shu)(shu)(shu)(shu)入(ru)(ru)輸(shu)(shu)(shu)(shu)出壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)同(tong)步.2,低(di)壓(ya)(ya)(ya)(ya)(ya)(ya)時(shi)(shi)(shi)(shi)輔人輸(shu)(shu)(shu)(shu)出壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)同(tong)步,高(gao)(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)時(shi)(shi)(shi)(shi)輸(shu)(shu)(shu)(shu)入(ru)(ru)輸(shu)(shu)(shu)(shu)出壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)正常.3,低(di)壓(ya)(ya)(ya)(ya)(ya)(ya)時(shi)(shi)(shi)(shi)輸(shu)(shu)(shu)(shu)入(ru)(ru)輸(shu)(shu)(shu)(shu)出壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)正常,高(gao)(gao)壓(ya)(ya)(ya)(ya)(ya)(ya)時(shi)(shi)(shi)(shi)輸(shu)(shu)(shu)(shu)入(ru)(ru)輸(shu)(shu)(shu)(shu)出壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)不正常.,1994.№為零時(shi)(shi)(shi)(shi)為混合(he)比(bi)倒圉工作性能試驗示意圖.試驗時(shi)(shi)(shi)(shi),先(xian)將管內(nei)的(de)空氣(qi)排凈,然后分別取低(di),中,高(gao)(gao)三個(ge)壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)進行試驗,輸(shu)(shu)(shu)(shu)入(ru)(ru)輔出壓(ya)(ya)(ya)(ya)(ya)(ya)力(li)(li)符合(he)即(ji)為合(he)格(ge)。

  Rexroth力(li)(li)士樂(le)比(bi)例(li)閥(fa)奧迪四輪(lun)驅(qu)動(dong)(dong)轎車(che)制(zhi)動(dong)(dong)系(xi)統(tong)在(zai)關閉ABS后(hou)(hou),感載(zai)(zai)(zai)(zai)比(bi)例(li)閥(fa)可用于(yu)(yu)防止后(hou)(hou)輪(lun)的(de)(de)(de)過制(zhi)動(dong)(dong)。當(dang)汽(qi)(qi)(qi)車(che)直線行駛(shi)時,兩(liang)后(hou)(hou)輪(lun)的(de)(de)(de)制(zhi)動(dong)(dong)壓力(li)(li)可根據(ju)車(che)輛載(zai)(zai)(zai)(zai)荷增減(jian);當(dang)汽(qi)(qi)(qi)車(che)左(zuo)(zuo)轉彎(wan)時,左(zuo)(zuo)后(hou)(hou)輪(lun)載(zai)(zai)(zai)(zai)荷下(xia)降,由于(yu)(yu)感載(zai)(zai)(zai)(zai)比(bi)例(li)閥(fa)位于(yu)(yu)左(zuo)(zuo)后(hou)(hou)輪(lun)附近,可同樣起作用使兩(liang)后(hou)(hou)輪(lun)的(de)(de)(de)制(zhi)動(dong)(dong)壓力(li)(li)都(dou)下(xia)降.而(er)(er)當(dang)汽(qi)(qi)(qi)車(che)右轉彎(wan)時,右后(hou)(hou)輪(lun)載(zai)(zai)(zai)(zai)荷減(jian)小,汽(qi)(qi)(qi)車(che)的(de)(de)(de)側(ce)向加(jia)速度使感載(zai)(zai)(zai)(zai)比(bi)例(li)閥(fa)起作用,降低右后(hou)(hou)輪(lun)的(de)(de)(de)制(zhi)動(dong)(dong)壓力(li)(li)。這(zhe)樣的(de)(de)(de)自動(dong)(dong)調節(jie)使前、后(hou)(hou)輪(lun)的(de)(de)(de)制(zhi)動(dong)(dong)力(li)(li)分配(pei)和左(zuo)(zuo)、右后(hou)(hou)輪(lun)的(de)(de)(de)制(zhi)動(dong)(dong)力(li)(li)分配(pei)都(dou)接近理想的(de)(de)(de)制(zhi)動(dong)(dong)力(li)(li)分配(pei),從而(er)(er)提高(gao)了制(zhi)動(dong)(dong)安全性。

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