Umsebenzi wenzwa yokungqongqoza imoto
Umsebenzi oyinhloko wenzwa yokungqongqoza yezimoto ukuthola into yokungqongqoza kwenjini, nokuvimbela ukungqongqoza ngokulungisa i-Angle yokushisa, ukuze kuvikelwe injini ekulimaleni.
Inzwa yokungqongqoza iguqula ukudlidliza komshini kwenjini kube yizimpawu zikagesi ezidluliselwa kuyunithi yokulawula kagesi (i-ECU). I-ECU ilungisa i-Angle yokuqhubela phambili yokushisa ngokwesignali eyamukelwe ukuze igweme ukuqhuma okuqhubekayo. Inzwa yokungqongqoza ivame ukusebenzisa ubuchwepheshe be-ceramic be-piezoelectric. Lapho injini inyakaza, i-ceramic iyacindezelwa futhi iguqulwe ukuze ikhiqize isignali kagesi, edluliselwa ku-ECU ngentambo evikelwe ukuze icutshungulwe.
Umgomo wokusebenza we-knock sensor usekelwe kumphumela we-piezoelectric, lapho injini ingqongqoza, izitsha ze-piezoelectric ngaphakathi kwe-sensor ziyacindezelwa, zikhiqize isignali kagesi. Lezi zimpawu zithunyelwa ku-ECU, elungisa i-ignition advance Angle ngokusekelwe kudatha egciniwe ukuze kuvinjelwe ukungqongqoza. Ngaphezu kwalokho, izinzwa ze-knock zingazwa ijubane nendawo yenjini, zinikeze ulwazi oluningi ukusiza ukuthuthukisa ukusebenza kwenjini.
Inzwa yokugoqa ivame ukufakwa endaweni ethile ebhulokini lenjini, njengaphakathi kwamasilinda amabili nantathu omshini wamasilinda amane noma phakathi kwamasilinda angu-1 nambili kanye nesilinda esingu-3 noma esingu-4. Indawo yayo yokuyibeka iqinisekisa ukubanjwa okubucayi kokudlidliza nokugoqa okuncane kwenjini.
Uma i-knock sensor ihluleka, nakuba ingeke ibangele ukuthi injini ihluleke ukuqala, izobangela izinkinga ezifana nokushaqeka kwenjini, ukulahlekelwa amandla, ukuwohloka kokusetshenziswa kukaphethiloli, kanye nezibani zamaphutha. Ngakho-ke, ukusebenza kahle kwe-knock sensor kubalulekile ekusebenzeni kwenjini.
I-Automotive knock sensor iyidivayisi efakwe ku-injini block, esetshenziswa kakhulu ukuthola ukungqongqoza kwenjini. Kunezinhlobo eziningi zezinzwa zokungqongqoza, ezivame kakhulu kuzo ezifaka phakathi i-magnetostrictive kanye ne-piezoelectric ceramic.
Uhlobo kanye nesakhiwo senzwa yokungqongqoza
I-Magnetostrictive : iqukethe i-core yamagnetic, i-unomphela i-magnet kanye ne-induction coil. Lapho injini idlidliza, i-magnetic core iyashintsha, okuholela ekushintsheni kwe-magnetic flux ku-induction coil, okuholela emandleni e-electromotive abangelwa yi-.
i-ceramic ye-piezoelectric : Uma injini inyakaza, i-ceramic engaphakathi iyacindezelwa ukuze kukhiqizwe isignali kagesi. Ngenxa yokuthi isignali ibuthakathaka, ikhebula lokuxhuma livame ukugoqwa ngentambo evikelwe .
i-resonance ye-piezoelectric : ifakwe engxenyeni engenhla yomzimba wenjini, ukusetshenziswa komphumela we-piezoelectric ukuguqula ukudlidliza komshini kube yizibonakaliso zikagesi. Lapho imvamisa yokudlidliza kwe-knock ihambisana nemvamisa yemvelo yenzwa, kuzokwenzeka isenzakalo se-resonance, futhi i-voltage yesignali ephezulu yokungqongqoza izokhishwa ku-ECU, ngokusho kwayo i-ECU izolungisa isikhathi sokuthungela ukuze igweme ukungqongqoza .
Indlela inzwa yokungqongqoza esebenza ngayo
Inzwa yokungqongqoza izwa ukudlidliza nemisindo yenjini bese iyiguqula ibe yizimpawu zikagesi ezithunyelwa kuyunithi yokulawula injini (ECU). I-ECU ilungisa i-Angle yokushisa kwangaphambilini ngokwesignali eyamukelwe ukuze ivimbele ukuqhuma. Umgomo oqondile wokusebenza umi kanje:
Ukucindezela kwe-Magnetostrictive : ukudlidliza kwenjini kubangela ukuthi umongo wamagnetic ushintshe, okushintsha ukugeleza kwamagnetic kukhoyili yokungeniswa, okuholela emandleni e-electromotive abangelwa yi-.
i-piezoelectric ceramic : lapho injini inyakaza, i-piezoelectric ceramic iyacindezelwa ukuze ikhiqize isignali kagesi, i-ECU ilungisa isikhathi sokushaqeka ngokwesignali.
Uhlobo lwe-piezoelectric resonance : lapho imvamisa yokudlidliza kwe-knock ihambisana nemvamisa yemvelo yenzwa, kwenzeka isenzakalo se-resonance, futhi i-voltage yesignali ye-knock ephezulu iphuma iye ku-ECU.
Indima yezinzwa zokungqongqoza ezimotweni
Umsebenzi oyinhloko we-knock sensor ukukala izinga lokujitha kwenjini. Lapho injini ikhipha ukugoba, isignali kagesi idluliselwa ku-ECU, bese i-ECU ilungisa i-ignition advance Angle ngokufanele ukuze ivimbele ukugoba okwengeziwe. Ukugoba kungabangela umonakalo wenjini, ngakho-ke ama-knock sensor adlala indima ebalulekile ekuvikeleni injini.
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