一、點火器組成部分
點火器的組成主要由電源、點火線圈、分電器、點火開關、火花塞、附(fu)加電阻及其短接裝置、高低壓(ya)導線等組成。
1、電(dian)源:由(you)蓄(xu)電(dian)池和發(fa)電(dian)機(ji)組成。啟動(dong)時(shi),點火系由(you)蓄(xu)電(dian)池提(ti)供低壓(ya)(ya)電(dian)能(neng);啟動(dong)后,當發(fa)電(dian)機(ji)電(dian)壓(ya)(ya)高于(yu)蓄(xu)電(dian)池電(dian)壓(ya)(ya)時(shi),點火系由(you)發(fa)電(dian)機(ji)提(ti)供低壓(ya)(ya)電(dian)能(neng)。
2、點火(huo)線圈:將汽車電(dian)源提供(gong)的12V低壓電(dian)轉變成能擊穿火(huo)花塞(sai)電(dian)極間(jian)隙的高壓電(dian)。
3、分電(dian)(dian)(dian)器(qi):在發電(dian)(dian)(dian)機(ji)凸(tu)輪軸驅動下,準時接(jie)通和(he)切斷點(dian)(dian)(dian)火(huo)線(xian)圈(quan)初級(ji)電(dian)(dian)(dian)流,使(shi)點(dian)(dian)(dian)火(huo)線(xian)圈(quan)及時產(chan)生高壓(ya)電(dian)(dian)(dian),并按點(dian)(dian)(dian)火(huo)順序(xu)將高壓(ya)電(dian)(dian)(dian)傳送(song)至各缸火(huo)花塞;同時能自(zi)動和(he)人為地實現對(dui)點(dian)(dian)(dian)火(huo)時間的調整。其中電(dian)(dian)(dian)容器(qi)的作用是減小(xiao)斷電(dian)(dian)(dian)器(qi)觸點(dian)(dian)(dian)火(huo)花,提高點(dian)(dian)(dian)火(huo)線(xian)圈(quan)次級(ji)電(dian)(dian)(dian)壓(ya)。
4、點(dian)火(huo)開關:控制(zhi)點(dian)火(huo)系低(di)壓電路(lu)的通斷,控制(zhi)發電機的啟動和熄火(huo)。
5、火花塞(sai):將高壓電(dian)引(yin)入燃燒室,產(chan)生電(dian)火花點燃混合(he)氣。
6、附加(jia)(jia)電阻短(duan)接(jie)裝(zhuang)置:起動時將附加(jia)(jia)電阻短(duan)接(jie),增大點(dian)火線圈初級電流,增強起動時火花塞(sai)的跳火能量。
二、點火器的種類
1、電子(zi)式脈(mo)沖式點(dian)火器:脈(mo)沖式因功率(lv)小所(suo)以點(dian)火的能量(liang)小,產生(sheng)的火花溫度(du)低(di),對有部(bu)分(fen)燃(ran)(ran)點(dian)高可遴(lin)性氣體和濃(nong)度(du)較(jiao)低(di)的混合氣體,有鼓風(feng)的燃(ran)(ran)燒器點(dian)火時點(dian)燃(ran)(ran)率(lv)較(jiao)低(di),經(jing)常(chang)會出現點(dian)不著或爆燃(ran)(ran)等安全(quan)事故,長時間且不能連續點(dian)火容(rong)易燒壞于(yu)燃(ran)(ran)油的燃(ran)(ran)燒器。
2、電(dian)子(zi)式高頻高壓點火器:功率大,點火能量高產(chan)生火花溫(wen)度高,但點火時(shi)間普遍不(bu)超5分鐘(zhong),否則容易發(fa)熱,燒壞,而(er)體積(ji)大而(er)重(zhong),安裝(zhuang)運輸難。
3、線圈矽(xi)鋼(gang)片(pian)式點(dian)火(huo)器:功率大,能量(liang)高產生(sheng)火(huo)花溫度高,點(dian)火(huo)時間10分鐘左(zuo)右,否則(ze)發熱燒壞(huai),體積較小而輕,但國(guo)產普(pu)遍質(zhi)量(liang)不好被進口(kou)占領(ling)90%市場。
三、點火器質量如何鑒別
1、將點火器的(de)接(jie)(jie)線都插(cha)接(jie)(jie)上(shang)(shang)時(shi),先(xian)不要接(jie)(jie)電(dian)(dian)源線(交流點火(huo)(huo)器(qi)的(de)充電(dian)(dian)端),或(huo)是預先(xian)就將磁電(dian)(dian)機的(de)高壓輸出(chu)線頭(tou)拔開。在(zai)確(que)定點火(huo)(huo)器(qi)的(de)地(di)線與(yu)車(che)上(shang)(shang)電(dian)(dian)路的(de)地(di)線連接(jie)(jie)良(liang)好后(hou),再(zai)將高壓帽從火(huo)(huo)花塞(sai)上(shang)(shang)拔出(chu),插(cha)一備份的(de)火(huo)(huo)花塞(sai)搭在(zai)車(che)體上(shang)(shang)。最(zui)后(hou)是將摩托車(che)上(shang)(shang)的(de)直(zhi)流電(dian)(dian)路(火(huo)(huo)線是接(jie)(jie)電(dian)(dian)瓶+極。)去連接(jie)(jie)點火(huo)(huo)器(qi)的(de)充電(dian)(dian)端。
2、將點(dian)(dian)(dian)(dian)火(huo)(huo)(huo)(huo)(huo)器(qi)按上述連接好電(dian)路后,轉動(dong)磁電(dian)機使觸(chu)發傳感器(qi)給(gei)點(dian)(dian)(dian)(dian)火(huo)(huo)(huo)(huo)(huo)器(qi)送去(qu)點(dian)(dian)(dian)(dian)火(huo)(huo)(huo)(huo)(huo)信號(hao),看火(huo)(huo)(huo)(huo)(huo)花(hua)塞是不是打(da)火(huo)(huo)(huo)(huo)(huo)。如果(guo)火(huo)(huo)(huo)(huo)(huo)花(hua)塞打(da)火(huo)(huo)(huo)(huo)(huo),這就是直(zhi)流點(dian)(dian)(dian)(dian)火(huo)(huo)(huo)(huo)(huo)器(qi)。(交(jiao)流點(dian)(dian)(dian)(dian)火(huo)(huo)(huo)(huo)(huo)器(qi)的(de)充電(dian)端通常接受上百伏電(dian)壓,對(dui)電(dian)瓶的(de)12V無(wu)動(dong)于(yu)衷(zhong)。)如果(guo)暫時不打(da)火(huo)(huo)(huo)(huo)(huo),也(ye)要(yao)仔細認真地檢查原因,或是用電(dian)表(biao)測量法確(que)定點(dian)(dian)(dian)(dian)火(huo)(huo)(huo)(huo)(huo)器(qi)性質,不可輕易誤判為交(jiao)流點(dian)(dian)(dian)(dian)火(huo)(huo)(huo)(huo)(huo)器(qi)。
3、比較(jiao)保險的(de)(de)辦法是使用(yong)低(di)壓(ya)(ya)電源做對(dui)點(dian)(dian)火(huo)(huo)器(qi)(qi)(qi)做反復測(ce)試(shi),多次確定不是使用(yong)低(di)壓(ya)(ya)電的(de)(de)直流(liu)(liu)點(dian)(dian)火(huo)(huo)器(qi)(qi)(qi)了,才(cai)可以(yi)判定為(wei)交流(liu)(liu)點(dian)(dian)火(huo)(huo)器(qi)(qi)(qi)。有(you)條件的(de)(de)車(che)友(you),可以(yi)使用(yong)小(xiao)電流(liu)(liu)的(de)(de)高(gao)壓(ya)(ya)電源,如果萬(wan)一是直流(liu)(liu)點(dian)(dian)火(huo)(huo)器(qi)(qi)(qi),也可以(yi)因電流(liu)(liu)小(xiao)=電壓(ya)(ya)降(jiang)低(di)而(er)不傷害點(dian)(dian)火(huo)(huo)器(qi)(qi)(qi)。但小(xiao)電流(liu)(liu)的(de)(de)高(gao)壓(ya)(ya),還是會對(dui)交流(liu)(liu)點(dian)(dian)火(huo)(huo)器(qi)(qi)(qi)實現充電的(de)(de),在測(ce)試(shi)中要小(xiao)心放電麻手。
4、對(dui)于特(te)殊情況,例如電(dian)感(gan)高(gao)壓(ya)包就不適合配套(tao)CDI點(dian)火(huo)器(qi);有(you)的(de)是點(dian)火(huo)器(qi)與高(gao)壓(ya)包合并的(de)點(dian)火(huo)器(qi),例如XH90四沖一體(ti)化點(dian)火(huo)器(qi)。還有(you)的(de)是自觸發的(de)二沖交流(liu)點(dian)火(huo)器(qi),是使用磁電(dian)機高(gao)壓(ya)電(dian)源的(de),正向充電(dian)蓄能/反向觸發放電(dian)。
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