Uyini umsebenzi wenzwa ye-camshaft yemoto?
Inzwa yesikhundla se-camshaft iyidivayisi yokuzwa, eyaziwa nangokuthi inzwa yesignali yokuvumelanisa. Iyidivayisi yokubeka indawo yokuhlukanisa isilinda efaka isignali yesikhundla se-camshaft ku-ECU futhi isebenza njengesignali yokulawula eyinhloko yokulawula ukuthungela.
Izici Zesakhiwo
Izinzwa ze-crankshaft ze-photoelectric kanye ne-camshaft position ezikhiqizwa yi-Nissan ziyizinguqulo ezithuthukisiwe zabasabalalisi. Ngokuyinhloko zakhiwa idiski yesiginali (okungukuthi, i-rotor yesiginali), i-generator yesiginali, i-distributor, i-sensor housing, kanye nesixhumi se-wiring harness.
Idiski yesignali iyi-rotor yesignali yenzwa futhi icindezelwa ku-shaft yenzwa. Emaphethelweni eduze kwediski yesignali, kunezindandatho ezimbili ezigxilile zezimbobo ezidlulisela ukukhanya ezinezikhawu ezifanayo. Phakathi kwazo, indandatho yangaphandle inezimbobo ezidlulisela ukukhanya ezingu-360 (缝隙), ezine-interval arc engu-1. (Izimbobo ezidlulisela ukukhanya zingu-0.5, kanti izimbobo zomthunzi zingu-0.5.) Zisetshenziselwa ukukhiqiza i-angle yokujikeleza kwe-crankshaft kanye nezibonakaliso zesivinini; indandatho yangaphakathi inezimbobo ezidlulisela ukukhanya ezingu-6 (izimbobo eziyisikwele), ezine-interval arc engu-60, ezisetshenziselwa ukukhiqiza izimpawu eziphakathi ezifile eziphezulu zesilinda ngayinye. Phakathi kwazo, imbobo eyodwa engunxande inohlangothi olude kancane olubanzi, olusetshenziselwa ukukhiqiza isignali ephakathi efile ephezulu yesilinda 1.
Ijenereyitha yesignali inamathele endlini yezinzwa. Iqukethe ijenereyitha yesignali ye-Ne (isivinini kanye ne-engeli yokujikeleza), ijenereyitha yesignali ye-G (isignali ephakathi ephezulu efile), kanye nesekethe yokucubungula isignali. Zombili ijenereyitha yesignali ye-Ne kanye ne-G zakhiwe yi-LED kanye ne-phototransistor (noma i-photodiode), enama-LED amabili abhekene nama-phototransistors amabili ngokulandelana. Isimiso sokusebenza
Idiski yesignali ifakwa phakathi kwe-diode ekhipha ukukhanya (i-LED) kanye ne-transistor ezwela ukukhanya (noma i-photodiode). Lapho imbobo edlulisela ukukhanya kudiski yesignali ijikeleza endaweni ephakathi kwe-LED kanye ne-transistor ezwela ukukhanya, ukukhanya okukhishwe yi-LED kuzokhanyiswa ku-transistor ezwela ukukhanya. Ngalesi sikhathi, i-transistor ezwela ukukhanya iqhuba futhi umqoqi wayo ukhipha izinga eliphansi (0.1 - 0.3V). Lapho ingxenye yomthunzi kudiski yesignali ijikeleza endaweni ephakathi kwe-LED kanye ne-transistor ezwela ukukhanya, ukukhanya okukhishwe yi-LED akukwazi ukukhanya ku-transistor ezwela ukukhanya. Ngalesi sikhathi, i-transistor ezwela ukukhanya iyanqanyulwa futhi umqoqi wayo ukhipha izinga eliphezulu (4.8 - 5.2V).
Uma idiski yesignali ijikeleza njalo, imbobo edlulisa ukukhanya kanye nengxenye yomthunzi kuzodlula ngokushintshana nge-LED ukuze kubonakale noma kufakwe umthunzi. Umqoqi we-transistor ezwela isithombe uzokhipha amazinga aphezulu naphansi ngokushintshana. Lapho ishaft yesensa ijikeleza nge-crankshaft kanye ne-valve timing camshaft, imbobo edlulisa ukukhanya kanye nengxenye yomthunzi kwidiski yesignali kuzodlula nge-LED. Ukukhanya okukhishwe yi-LED kuzokhanya ngokushintshana kwi-transistor ezwela isithombe yejeneretha yesignali ngenxa yomphumela wokudlulisa ukukhanya kanye nomthunzi wediski yesignali. Ngakho-ke, isignali ye-pulse ehambisana nendawo ye-crankshaft kanye ne-valve timing camshaft izokhiqizwa ku-sensor yesignali.
Njengoba i-crankshaft ijikeleza kabili, i-sensor shaft ishayela idiski yesignali ukuze ijikeleze indilinga eyodwa egcwele. Ngakho-ke, i-sensor yesignali ye-G izokhiqiza izimpawu ze-pulse eziyi-6. I-sensor yesignali ye-Ne izokhiqiza izimpawu ze-pulse eziyi-360. Ngenxa yokuthi i-interval arc yembobo edlulisa ukukhanya yesignali ye-G ingu-60 degrees, i-pulse signal ikhiqizwa njalo ngama-degree ayi-120 okujikeleza kwe-crankshaft. Ngakho-ke, i-G signal ivame ukubizwa ngokuthi i-signal ye-120. Ukufakwa komklamo kuqinisekisa ukuthi i-signal ye-120 ikhiqizwa ngama-degree angama-70 ngaphambi kwesikhungo esifile phezulu (BTDC70). Isignali ekhiqizwa yimbobo edlulisa ukukhanya enobubanzi obuyindilinga obude kancane ihambelana nama-degree angama-70 ngaphambi kwesikhungo esifile phezulu sesilinda 1 senjini, ukuze i-ECU ikwazi ukulawula i-engeli yokusheshisa i-fuel injection kanye ne-engeli yokusheshisa i-ignition. Ngenxa yokuthi i-interval arc yembobo edlulisa ukukhanya yesignali ye-Ne ingu-1 degree (imbobo edlulisa ukukhanya ithatha ama-degree angu-0.5 kanti imbobo yokufiphaza ithatha ama-degree angu-0.5), kumjikelezo ngamunye we-pulse, amazinga aphezulu naphansi ngalinye lithatha i-engeli ye-crankshaft eyodwa. Izimpawu ezingu-360 zimelela ukujikeleza kwama-degree angu-720 e-crankshaft. Njalo ngama-degree angu-120 okujikeleza kwe-crankshaft, inzwa yesignali ye-G ikhiqiza isignali eyodwa kanti inzwa yesignali ye-Ne ikhiqiza amasignali angu-60.
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