燃油泵的工作有2種控制管理方式。維修挖掘機第一臺液壓挖掘機由法國波克蘭工廠發明成功。由于液壓技術的應用，20世紀40年代有了在拖拉機上配裝液壓反鏟地懸掛式挖掘機。修理挖掘機常見的挖掘機結構包括，動力裝置，工作裝置，回轉機構，操縱機構，傳動機構，行走機構和輔助設施等。挖掘機維修最重(zhong)(zhong)要的(de)三(san)個(ge)參數：操作重(zhong)(zhong)量(liang)（質量(liang)），發(fa)(fa)動機功率和(he)鏟斗斗容。一是企業工(gong)作時(shi)的(de)控制。為了能夠保證社(she)會(hui)車輛的(de)安全，只有在發(fa)(fa)動機正常運(yun)(yun)轉(zhuan)送來進行相應(ying)的(de)信號(hao)舊寸，燃油泵(beng)才工(gong)作。二是通過轉(zhuan)速(su)的(de)控制。在發(fa)(fa)動機技術高速(su)和(he)低(di)速(su)發(fa)(fa)展運(yun)(yun)轉(zhuan)時(shi)，燃油泵(beng)也相應(ying)的(de)有高速(su)和(he)低(di)速(su)經濟(ji)運(yun)(yun)轉(zhuan)2種工(gong)作生(sheng)活方式。

電動噴(pen)射(電控(kong)燃(ran)(ran)油(you)噴(pen)射EFI)發動機有多種(zhong)形式(shi)。 進(jin)氣(qi)(qi)歧管壓力(li)檢(jian)(jian)測(ce)(ce)型(xing)噴(pen)射裝(zhuang)置，又稱D型(xing)噴(pen)射系(xi)統(tong)。 它是(shi)(shi)一(yi)種(zhong)通過安(an)裝(zhuang)在進(jin)氣(qi)(qi)歧管中的(de)進(jin)氣(qi)(qi)壓力(li)傳(chuan)感器進(jin)行速度密度檢(jian)(jian)測(ce)(ce)的(de)方法。 另(ling)一(yi)種(zhong)是(shi)(shi)進(jin)氣(qi)(qi)流量(liang)檢(jian)(jian)測(ce)(ce)注射裝(zhuang)置，也稱為L注射系(xi)統(tong)。 是(shi)(shi)一(yi)種(zhong)由進(jin)氣(qi)(qi)歧管前端安(an)裝(zhuang)的(de)進(jin)氣(qi)(qi)流量(liang)傳(chuan)感器（葉(xie)片(pian)式(shi)，卡(ka)門渦旋式(shi)，熱(re)線式(shi)和熱(re)膜式(shi)）進(jin)行質量(liang)流量(liang)檢(jian)(jian)測(ce)(ce)的(de)方法。 對D注油(you)系(xi)統(tong)和L注油(you)系(xi)統(tong)的(de)燃(ran)(ran)油(you)泵的(de)控(kong)制原理不同。 1燃(ran)(ran)油(you)泵控(kong)制

燃油泵(beng)轉速的(de)控制

為(wei)了滿足高速、高負荷(he)、低速供油的(de)不(bu)同要(yao)求(qiu)，減少(shao)燃油泵(beng)不(bu)必要(yao)的(de)機(ji)械磨損，所有(you)電噴發(fa)動機(ji)都安(an)裝了燃油泵(beng)轉(zhuan)速控制電路。主要(yao)的(de)控制方法如下(xia)。

一(yi)個(ge)。圖。 3是式電阻電壓燃(ran)油泵的(de)速度(du)控制電路，這(zhe)增加了燃(ran)料泵控制繼電器和降壓電阻器的(de)旋轉速度(du)的(de)電阻電壓。

其工作基本原理是：閉合(he)點火系統開關(guan)，發(fa)(fa)動(dong)機(ji)(ji)正常運轉(zhuan)(zhuan)后(hou)，燃(ran)(ran)(ran)(ran)油(you)泵(beng)(beng)(beng)開關(guan)K閉合(he)，燃(ran)(ran)(ran)(ran)油(you)泵(beng)(beng)(beng)技術(shu)開始通(tong)過(guo)供油(you)。在(zai)發(fa)(fa)動(dong)機(ji)(ji)低(di)轉(zhuan)(zhuan)速(su)小負(fu)荷計算工況時，電(dian)子設計控制器(qi)(qi)ECU根據檢測到的發(fa)(fa)動(dong)機(ji)(ji)不(bu)同工況，使(shi)其企業內部(bu)的三極(ji)管(guan)導通(tong)，接(jie)通(tong)燃(ran)(ran)(ran)(ran)油(you)泵(beng)(beng)(beng)轉(zhuan)(zhuan)速(su)可以(yi)控制時間繼(ji)電(dian)器(qi)(qi)輸出線(xian)圈產(chan)生(sheng)電(dian)路。繼(ji)電(dian)器(qi)(qi)的觸點K2閉合(he)，將降(jiang)壓電(dian)阻網絡接(jie)入燃(ran)(ran)(ran)(ran)油(you)泵(beng)(beng)(beng)模塊電(dian)路中，使(shi)燃(ran)(ran)(ran)(ran)油(you)泵(beng)(beng)(beng)低(di)速(su)發(fa)(fa)展運轉(zhuan)(zhuan)，減少泵(beng)(beng)(beng)油(you)量。在(zai)發(fa)(fa)動(dong)機(ji)(ji)高轉(zhuan)(zhuan)速(su)、大負(fu)荷管(guan)理工作的情況下，ECU檢測到汽車(che)發(fa)(fa)動(dong)機(ji)(ji)運行工況后(hou)，使(shi)其公司內部(bu)的三極(ji)管(guan)截止，切斷(duan)燃(ran)(ran)(ran)(ran)油(you)泵(beng)(beng)(beng)轉(zhuan)(zhuan)速(su)達(da)到控制信號繼(ji)電(dian)器(qi)(qi)線(xian)圈的電(dian)路。燃(ran)(ran)(ran)(ran)油(you)泵(beng)(beng)(beng)轉(zhuan)(zhuan)速(su)實現(xian)控制對于繼(ji)電(dian)器(qi)(qi)的觸點K2斷(duan)開、K1閉合(he)，短(duan)接(jie)降(jiang)壓電(dian)阻，使(shi)燃(ran)(ran)(ran)(ran)油(you)泵(beng)(beng)(beng)高速(su)經(jing)濟運轉(zhuan)(zhuan)，增加泵(beng)(beng)(beng)油(you)量。

控制(zhi)原(yuan)理，當燃(ran)油泵

D型燃(ran)(ran)油(you)(you)(you)通(tong)過(guo)噴射技術(shu)系(xi)統造(zao)成(cheng)燃(ran)(ran)油(you)(you)(you)泵進行工(gong)(gong)作(zuo)的(de)(de)控制基本原(yuan)理（圖1）閉合點(dian)(dian)(dian)火(huo)時(shi)間(jian)開關，發(fa)(fa)動(dong)機(ji)不能起(qi)動(dong)時(shi)，主繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)輸(shu)出(chu)線圈(quan)得(de)電(dian)(dian)(dian)(dian)(dian)后(hou)，其(qi)觸(chu)點(dian)(dian)(dian)形成(cheng)閉合，接通(tong)燃(ran)(ran)油(you)(you)(you)泵繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)驅動(dong)電(dian)(dian)(dian)(dian)(dian)源。隨后(hou)燃(ran)(ran)油(you)(you)(you)泵繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)內主線圈(quan)L1得(de)電(dian)(dian)(dian)(dian)(dian)，其(qi)觸(chu)點(dian)(dian)(dian)也閉合，這(zhe)(zhe)時(shi)燃(ran)(ran)油(you)(you)(you)泵出(chu)現開始研究工(gong)(gong)作(zuo)。發(fa)(fa)動(dong)機(ji)管(guan)理工(gong)(gong)作(zuo)后(hou)，分電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)內的(de)(de)轉速(su)(su)(su)不同傳(chuan)感器(qi)(qi)可以送(song)出(chu)一個轉速(su)(su)(su)數據信(xin)號Ne到發(fa)(fa)動(dong)機(ji)發(fa)(fa)展電(dian)(dian)(dian)(dian)(dian)子(zi)設(she)計控制器(qi)(qi)（ECU），使其(qi)企(qi)業內部的(de)(de)三極管(guan)導通(tong)。這(zhe)(zhe)時(shi)燃(ran)(ran)油(you)(you)(you)泵繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)內的(de)(de)線圈(quan)L2 經(jing)三極管(guan)到搭鐵構成(cheng)部分電(dian)(dian)(dian)(dian)(dian)流保護回(hui)路。線圈(quan)L2產(chan)生(sheng)一種磁力將保持燃(ran)(ran)油(you)(you)(you)泵繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的(de)(de)觸(chu)點(dian)(dian)(dian)提(ti)供(gong)可靠閉合。當(dang)發(fa)(fa)動(dong)機(ji)自動(dong)熄火(huo)時(shi)，分電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)送(song)來的(de)(de)轉速(su)(su)(su)提(ti)高(gao)信(xin)號Ne消(xiao)失，ECU內的(de)(de)三極管(guan)截止(zhi)，線圈(quan)L2失電(dian)(dian)(dian)(dian)(dian)，燃(ran)(ran)油(you)(you)(you)泵繼電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)的(de)(de)觸(chu)點(dian)(dian)(dian)斷開，燃(ran)(ran)油(you)(you)(you)泵停止(zhi)學習工(gong)(gong)作(zuo)。