Firikwensin matsin lamba na iska 274-6720 don cat 320D

Firikwensin matsa lamba yana gano cikakken matsi na nau'in abin sha a bayan magudanar. Yana gano canjin cikakken matsa lamba a cikin manifold gwargwadon saurin injin da lodi, sannan ya canza shi zuwa wutar lantarki ta sigina ya aika zuwa sashin sarrafa injin (ECU). ECU tana sarrafa ainihin adadin allurar mai gwargwadon ƙarfin siginar.

ka'idar aiki

Akwai nau'ikan firikwensin matsa lamba iri-iri, kamar varistor da capacitor. Saboda fa'idodin lokacin amsawa mai sauri, babban ganewar daidaito, ƙananan girman da shigarwa mai sassauƙa, ana amfani da varistor sosai a cikin tsarin allurar nau'in D.

Hoto na 1 yana nuna alaƙa tsakanin firikwensin matsa lamba na piezoresistive da kwamfuta. Hoto 2 shine ka'idar aiki na firikwensin matsa lamba na piezoresistive, da R a cikin fig. 1 shine resistors R1, R2, R3 da R4 a fig. 2, waɗanda ke samar da gadar Whiston kuma an haɗa su da diaphragm na silicon. Silicon diaphragm na iya zama nakasu a ƙarƙashin aikin cikakken matsa lamba a cikin manifold, wanda ke haifar da canjin juriya na juriya na resistor R. Mafi girman matsi mai mahimmanci a cikin manifold, mafi girma nakasar silicon diaphragm, kuma ta haka ne. mafi girman canjin ƙimar juriya na resistor R.. Wato, canjin injin siliki na diaphragm yana canzawa zuwa siginar lantarki, wanda aka haɓaka ta hanyar haɗaɗɗun kewayawa da fitarwa zuwa ECU.

Manifold Absolute Pressure Sensor (MAP). Yana haɗa nau'in abin sha tare da vacuum tube, kuma tare da nau'in saurin injin daban-daban, yana jin canjin injin a cikin nau'in abin sha, sannan ya canza shi zuwa siginar wutar lantarki daga canjin juriya na ciki na firikwensin don ECU don gyarawa. yawan allurar man fetur da kusurwar lokacin kunnawa.

A cikin injin EFI, ana amfani da firikwensin matsa lamba don gano ƙarar iska mai ɗaukar nauyi, wanda ake kira tsarin alluran nau'in D (nau'in girman saurin gudu). Na'urar daukar nauyin iska tana gano yawan iskar da aka yi a kaikaice maimakon kai tsaye a matsayin firikwensin motsin iska, haka nan kuma abubuwa da yawa suna shafar shi, don haka akwai bambance-bambance da yawa tsakanin ganowa da kula da na'urar daukar nauyin iska, da kuma kurakuran da hakan ke haifarwa. suna da na musamman.