(1)使各缸依爆(bao)發(fa)次序(xu)按時點(dian)火。 

　　(2)使(shi)斷電(dian)器(qi)按時切斷初級(ji)線路，并能準確地使(shi)高壓(ya)感應電(dian)流在火花塞兩極之間跳火。 

　　(3)由于驅(qu)動(dong)(dong)回轉速度(du)的高低(di)不穩(wen)和(he)真(zhen)空吸力強弱(ruo)不均，故設離(li)心(xin)式自(zi)(zi)(zi)動(dong)(dong)提(ti)(ti)(ti)前(qian)裝(zhuang)置和(he)真(zhen)空式自(zi)(zi)(zi)動(dong)(dong)提(ti)(ti)(ti)前(qian)裝(zhuang)置，在發(fa)(fa)動(dong)(dong)機工作時它們各自(zi)(zi)(zi)發(fa)(fa)生(sheng)作用(yong)。轉速增減或負荷(he)變化時都能(neng)圓滿(man)地使點火時間(jian)自(zi)(zi)(zi)動(dong)(dong)得到調整。離(li)心(xin)式自(zi)(zi)(zi)動(dong)(dong)提(ti)(ti)(ti)前(qian)裝(zhuang)置是隨(sui)著發(fa)(fa)動(dong)(dong)機轉速提(ti)(ti)(ti)高而(er)提(ti)(ti)(ti)前(qian)點火的，真(zhen)空式自(zi)(zi)(zi)動(dong)(dong)提(ti)(ti)(ti)前(qian)裝(zhuang)置是隨(sui)發(fa)(fa)動(dong)(dong)機轉速下降而(er)提(ti)(ti)(ti)前(qian)點火的。 

電(dian)(dian)(dian)磁繼電(dian)(dian)(dian)器一(yi)(yi)般由鐵(tie)(tie)芯、線圈(quan)、銜鐵(tie)(tie)、觸(chu)點簧片等組成的(de)。只要在(zai)(zai)線圈(quan)兩端加上一(yi)(yi)定(ding)的(de)電(dian)(dian)(dian)壓，線圈(quan)中就會流(liu)(liu)過一(yi)(yi)定(ding)的(de)電(dian)(dian)(dian)流(liu)(liu)，從而產生電(dian)(dian)(dian)磁效(xiao)應，銜鐵(tie)(tie)就會在(zai)(zai)電(dian)(dian)(dian)磁力吸引(yin)的(de)作用下(xia)克服(fu)返回(hui)彈(dan)簧的(de)拉力吸向鐵(tie)(tie)芯，從而帶動(dong)銜鐵(tie)(tie)的(de)動(dong)觸(chu)點與靜觸(chu)點（常開觸(chu)點）吸合。

當線圈(quan)斷(duan)電(dian)(dian)后，電(dian)(dian)磁的(de)(de)(de)吸(xi)力也隨之消失，銜鐵就會在彈簧的(de)(de)(de)反作用力返回原來(lai)的(de)(de)(de)位置，使動觸(chu)點(dian)(dian)與原來(lai)的(de)(de)(de)靜觸(chu)點(dian)(dian)（常(chang)閉(bi)觸(chu)點(dian)(dian)）釋放。這樣吸(xi)合、釋放，從而達到(dao)了在電(dian)(dian)路(lu)(lu)中的(de)(de)(de)導通(tong)(tong)、切斷(duan)的(de)(de)(de)目的(de)(de)(de)。對(dui)于(yu)繼(ji)電(dian)(dian)器的(de)(de)(de)“常(chang)開(kai)、常(chang)閉(bi)”觸(chu)點(dian)(dian)，可以這樣來(lai)區分(fen)：繼(ji)電(dian)(dian)器線圈(quan)未(wei)通(tong)(tong)電(dian)(dian)時處(chu)于(yu)斷(duan)開(kai)狀態(tai)的(de)(de)(de)靜觸(chu)點(dian)(dian)，稱(cheng)為(wei)“常(chang)開(kai)觸(chu)點(dian)(dian)”；處(chu)于(yu)接通(tong)(tong)狀態(tai)的(de)(de)(de)靜觸(chu)點(dian)(dian)稱(cheng)為(wei)“常(chang)閉(bi)觸(chu)點(dian)(dian)”。繼(ji)電(dian)(dian)器一般有兩股電(dian)(dian)路(lu)(lu)，為(wei)低壓控制電(dian)(dian)路(lu)(lu)和高壓工作電(dian)(dian)路(lu)(lu)

根據電(dian)(dian)(dian)磁互感原理，兩個線(xian)(xian)(xian)圈(quan)(quan)在(zai)直流電(dian)(dian)(dian)作(zuo)用下要達到變(bian)壓(ya)的(de)(de)(de)目(mu)的(de)(de)(de)，必須使初級線(xian)(xian)(xian)圈(quan)(quan)中(zhong)的(de)(de)(de)電(dian)(dian)(dian)流發(fa)(fa)生變(bian)化(hua)，此(ci)電(dian)(dian)(dian)流的(de)(de)(de)變(bian)化(hua)決定于(yu)電(dian)(dian)(dian)路(lu)(lu)中(zhong)開關(guan)的(de)(de)(de)開閉(bi)瞬間動(dong)作(zuo)。為此(ci)，點(dian)火線(xian)(xian)(xian)圈(quan)(quan)必須在(zai)初級線(xian)(xian)(xian)圈(quan)(quan)電(dian)(dian)(dian)路(lu)(lu)中(zhong)裝設一個專(zhuan)門控制電(dian)(dian)(dian)流變(bian)化(hua)的(de)(de)(de)開關(guan)機(ji)構即斷(duan)電(dian)(dian)(dian)器(qi)。此(ci)外，發(fa)(fa)動(dong)機(ji)的(de)(de)(de)點(dian)火是(shi)按各(ge)(ge)缸作(zuo)功順序(xu)(xu)依次循環進(jin)行的(de)(de)(de)，這就要求(qiu)只有在(zai)某(mou)一氣缸點(dian)火時才產生出高壓(ya)電(dian)(dian)(dian)。因此(ci)，斷(duan)電(dian)(dian)(dian)器(qi)就是(shi)按點(dian)火線(xian)(xian)(xian)圈(quan)(quan)產生高壓(ya)電(dian)(dian)(dian)并與發(fa)(fa)動(dong)機(ji)各(ge)(ge)氣缸點(dian)火順序(xu)(xu)相配合而進(jin)行工作(zuo)的(de)(de)(de)。 

潤田專業生產大連配電箱、大連電控柜、大連高低壓開關柜的電器成套設備。