Menene aikin firikwensin camshaft na mota?
Na'urar firikwensin matsayi na camshaft na'urar firikwensin ce, wacce aka fi sani da na'urar firikwensin siginar daidaitawa. Na'urar sanya silinda ce mai nuna bambanci wanda ke shigar da siginar matsayin camshaft zuwa ECU kuma tana aiki a matsayin babbar siginar sarrafawa don sarrafa kunnawa.
Halayen Tsarin
Na'urorin auna karfin wutar lantarki na daukar hoto da kuma matsayin camshaft da Nissan ke samarwa sigar masu rarrabawa ce ta ingantattun na'urori. Galibi sun kunshi faifan sigina (watau, na'urar juyawar sigina), janareta na sigina, mai rarrabawa, wurin da ke dauke da na'urori masu auna firikwensin, da kuma mahaɗin igiyar waya.
Faifan siginar shine na'urar juyawar siginar na'urar firikwensin kuma ana matse shi a kan sandar firikwensin. A gefen da ke kusa da faifan siginar, akwai zobba biyu masu ma'ana na ramuka masu watsa haske tare da tazara iri ɗaya. Daga cikinsu, zoben waje yana da ramuka 360 masu watsa haske (缝隙), tare da baka na tazara na 1. (Rakunan masu watsa haske suna lissafin 0.5, kuma ramukan inuwa suna lissafin 0.5.) Ana amfani da su don samar da kusurwar juyawa da siginar gudu; zoben ciki yana da ramuka 6 masu watsa haske (ramuka masu kusurwa huɗu), tare da baka na tazara na 60, wanda ake amfani da shi don samar da siginar tsakiya na sama na kowane silinda. Daga cikinsu, rami ɗaya mai kusurwa huɗu yana da gefe mai faɗi kaɗan, wanda ake amfani da shi don samar da siginar tsakiya na sama na silinda 1.
An sanya janareta siginar a kan wurin da aka sanya na'urar firikwensin. Ya ƙunshi janareta siginar Ne (siginar kusurwar gudu da juyawa), janareta siginar G (siginar tsakiya mai mutuwa), da kuma da'irar sarrafa sigina. Dukansu janareta siginar Ne da janareta siginar G sun ƙunshi LED da kuma transistor (ko photodiode), tare da LEDs guda biyu suna fuskantar na'urorin daukar hoto guda biyu bi da bi. Ka'idar aiki
Ana sanya faifan siginar tsakanin diode mai fitar da haske (LED) da transistor mai ɗaukar hoto (ko photodiode). Lokacin da ramin watsa haske akan faifan siginar ya juya zuwa matsayin da ke tsakanin LED da transistor mai ɗaukar hoto, hasken da LED ke fitarwa zai haskaka akan transistor mai ɗaukar hoto. A wannan lokacin, transistor mai ɗaukar hoto yana gudana kuma mai tattara shi yana fitar da ƙaramin matakin (0.1 - 0.3V). Lokacin da ɓangaren inuwa akan faifan siginar ya juya zuwa matsayin da ke tsakanin LED da transistor mai ɗaukar hoto, hasken da LED ke fitarwa ba zai iya haskakawa akan transistor mai ɗaukar hoto ba. A wannan lokacin, ana yanke transistor mai ɗaukar hoto kuma mai tattara shi yana fitar da babban matakin (4.8 - 5.2V).
Idan faifan siginar ke juyawa akai-akai, ramin da ke watsa haske da ɓangaren inuwa za su wuce ta LED don su kasance masu haske ko kuma masu inuwa. Mai tattara transistor mai saurin daukar hoto zai fitar da matakai masu girma da ƙanƙanta a madadin haka. Lokacin da shaft ɗin firikwensin ya juya tare da shaft ɗin crankshaft da shaft ɗin agogon bawul, ramin mai watsa haske da ɓangaren inuwa a kan faifan siginar za su wuce ta LED. Hasken da LED ke fitarwa za su haskaka a kan transistor mai saurin daukar hoto na janareta siginar saboda tasirin watsa haske da inuwa na faifan siginar. Don haka, za a samar da siginar bugun jini da ta dace da matsayin shaft ɗin crankshaft da shaft ɗin agogon bawul a cikin firikwensin siginar.
Tunda crankshaft yana juyawa juyi biyu, shaft ɗin firikwensin yana tura faifan siginar don juya da'ira ɗaya cikakke. Saboda haka, firikwensin siginar G zai samar da siginar bugun jini guda 6. Firikwensin siginar Ne zai samar da siginar bugun jini guda 360. Saboda tazara ta ramin mai watsa haske na siginar G digiri 60 ne, ana samar da siginar bugun jini a kowace digiri 120 na juyawar crankshaft. Saboda haka, yawanci ana kiran siginar G siginar 120. Shigar da ƙira yana tabbatar da cewa an samar da siginar 120 digiri 70 kafin tsakiyar matacce ta sama (BTDC70). Siginar da ramin mai watsa haske ya samar tare da faɗin murabba'i mai ɗan tsayi ya yi daidai da digiri 70 kafin tsakiyar matacce ta sama na silinda 1 na injin, don haka ECU zai iya sarrafa kusurwar allurar mai da kusurwar gaba ta kunna wuta. Saboda tazara ta ramin mai watsa haske na siginar Ne digiri 1 ne (ramin mai watsa haske ya mamaye digiri 0.5 kuma ramin inuwa ya mamaye digiri 0.5), a kowane zagayowar bugun jini, manyan da ƙananan matakan kowannensu ya mamaye kusurwar crankshaft guda 1. Sigina 360 suna wakiltar juyawar digiri 720 na crankshaft. Kowace digiri 120 na juyawar crankshaft, na'urar firikwensin siginar G tana samar da sigina ɗaya kuma na'urar firikwensin siginar Ne tana samar da sigina 60.
Idan kana son ƙarin bayani, ci gaba da karanta sauran labaran da ke wannan shafin!
Don Allah a kira mu idan kuna buƙatar irin waɗannan kayayyaki.
Kudin hannun jari Zhuo Meng Shanghai Auto Co., Ltd. ta kuduri aniyar sayar da MG&MAXUSsassan mota maraba siya.
