Yintoni umsebenzi we-sensor ye-camshaft yemoto?
Isixhobo sokubona indawo ye-camshaft sisixhobo sokuva, esaziwa ngokuba sisixhobo sokubona isignali yokuvumelanisa. Sisixhobo sokubeka isilinda esifaka isignali yendawo ye-camshaft kwi-ECU kwaye sisebenza njengomqondiso ophambili wolawulo lokutshisa.
Iimpawu zoLwakhiwo
Iisensa ze-photoelectric crankshaft kunye ne-camshaft position sensors eziveliswe yiNissan ziinguqulelo eziphuculweyo zabasasazi. Ngokuyintloko ziquka idiski yesiginali (oko kukuthi, i-signal rotor), i-signal generator, i-distributor, i-sensor housing, kunye ne-wire harness connector.
Idiski yesignali yirotor yesignali yesensor kwaye icinezelwe kwishaft yesensor. Emaphethelweni kufutshane nediski yesignali, kukho iiringi ezimbini ezixinanisiweyo zemingxuma edlulisa ukukhanya enezithuba ezifanayo. Phakathi kwazo, iringi yangaphandle inemingxuma engama-360 edlulisa ukukhanya (缝隙), ene-arc yesithuba eyi-1. (Imingxuma edlulisa ukukhanya ibandakanya i-0.5， kwaye imingxunya yesithunzi ibandakanya i-0.5.) Zisetyenziselwa ukuvelisa i-angle yokujikeleza kwe-crankshaft kunye nezibonakaliso zesantya； iringi yangaphakathi inemingxuma emi-6 edlulisa ukukhanya (imingxunya engunxande), ene-arc yesithuba eyi-60， esetyenziselwa ukuvelisa imiqondiso yesikhungo esifileyo ephezulu yesilinda nganye. Phakathi kwazo, umngxuma omnye onxande unecala elide kancinci elibanzi, elisetyenziselwa ukuvelisa isignali yesikhungo esifileyo ephezulu yesilinda 1.
Ijenereyitha yesignali ixhomekeke kwigumbi lesensor. Iqulathe ijenereyitha yesignali yeNe (isantya kunye ne-engile yesignali yokujikeleza), ijenereyitha yesignali yeG (isignali ephakathi ephezulu efileyo), kunye nesekethe yokucubungula isignali. Zombini iijenereyitha zesignali yeNe kunye neG zenziwe yi-LED kunye ne-phototransistor (okanye i-photodiode), kunye nee-LED ezimbini ezijongene nee-phototransistors ezimbini ngokulandelelana. Umgaqo wokusebenza
Idiski yesignali ifakelwe phakathi kwe-diode ekhupha ukukhanya (i-LED) kunye ne-transistor ebona ukukhanya (okanye i-photodiode). Xa umngxuma ohambisa ukukhanya kwidiski yesignali ujikeleza kwindawo ephakathi kwe-LED kunye ne-transistor ebona ukukhanya, ukukhanya okuphuma kwi-LED kuya kukhanya kwi-transistor ebona ukukhanya. Ngeli xesha, i-transistor ebona ukukhanya iqhuba kwaye umqokeleli wayo ukhupha umgangatho ophantsi (0.1 - 0.3V). Xa inxalenye yomthunzi kwidiski yesignali ijikeleza kwindawo ephakathi kwe-LED kunye ne-transistor ebona ukukhanya, ukukhanya okuphuma kwi-LED akunakukhanyiswa kwi-transistor ebona ukukhanya. Ngeli xesha, i-transistor ebona ukukhanya iyanqunyulwa kwaye umqokeleli wayo ukhupha umgangatho ophezulu (4.8 - 5.2V).
Ukuba idiski yesignali ijikeleza rhoqo, umngxuma ohambisa ukukhanya kunye nenxalenye yomthunzi ziya kudlula ngokutshintshana nge-LED ukuze zibonakale okanye zibe nombala. Umqokeleli we-transistor evakalelwa kukukhanya uya kukhupha amanqanaba aphezulu naphantsi ngokutshintshana. Xa ishaft yesensor ijikeleza nge-crankshaft kunye ne-valve timing camshaft, umngxuma ohambisa ukukhanya kunye nenxalenye yomthunzi kwidiski yesignali ziya kudlula nge-LED. Ukukhanya okuphuma yi-LED kuya kukhanya ngokutshintshana kwi-transistor evakalelwa kukukhanya yejenereyitha yesignali ngenxa yesiphumo sokudlulisa ukukhanya kunye nomthunzi sediski yesignali. Ke ngoko, isignali ye-pulse ehambelana nendawo ye-crankshaft kunye ne-valve timing camshaft iya kuveliswa kwi-sensor yesignali.
Ekubeni i-crankshaft ijikeleza kabini, i-sensor shaft iqhuba idiski yesignali ukuze ijikeleze isangqa esinye esipheleleyo. Ke ngoko, i-sensor yesignali ye-G iya kuvelisa imiqondiso ye-pulse emi-6. I-sensor yesignali ye-Ne iya kuvelisa imiqondiso ye-pulse engama-360. Ngenxa yokuba i-interval arc yomngxuma ohambisa ukukhanya wesignali ye-G yi-60 degrees, i-pulse signal yenziwa rhoqo nge-120 degrees yokujikeleza kwe-crankshaft. Ke ngoko, i-G signal idla ngokubizwa ngokuba yi-120 signal. Ufakelo loyilo luqinisekisa ukuba i-120 signal iveliswa nge-70 degrees ngaphambi kwe-top dead center (BTDC70). Isignali eveliswa ngumngxuma ohambisa ukukhanya onobubanzi obude kancinci obufana ne-70 degrees ngaphambi kwe-top dead center yesilinda 1 yenjini, ukuze i-ECU ikwazi ukulawula i-engile ye-fuel injection advance kunye ne-ignition advance angle. Ngenxa yokuba i-interval arc yomngxuma ohambisa ukukhanya wesignali ye-Ne yi-1 degree (umngxuma ohambisa ukukhanya uhlala nge-0.5 degrees kwaye umngxuma womthunzi uhlala nge-0.5 degrees), kumjikelo ngamnye we-pulse, amanqanaba aphezulu naphantsi ngalinye lithatha i-engile ye-crankshaft e-1. Imiqondiso engama-360 imele ukujikeleza kwee-degrees ezingama-720 ze-crankshaft. Rhoqo nge-degrees ezili-120 zokujikeleza kwe-crankshaft, i-sensor yesignali ye-G ivelisa isignali enye kwaye i-sensor yesignali ye-Ne ivelisa imiqondiso engama-60.
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