Inzwa yokucindezela komoya (i-ManifoldAbsolutePressureSensor), ezobizwa ngokuthi i-MAP kamuva. Ixhunywe ku-incase manifold nge-vacuum tube. Ngemithwalo yesivinini senjini ehlukene, ingazwa ushintsho lwe-vacuum ku-incase manifold, bese iguqula ushintsho lokumelana ngaphakathi kwenzwa lube isignali ye-voltage, engasetshenziswa yi-ECU ukulungisa inani lomjovo kanye ne-ignition timing Angle.
Enjinini ye-EFI, inzwa yokucindezela kokungenisa isetshenziswa ukuthola ivolumu yokungenisa, ebizwa ngokuthi uhlelo lwe-D injection (uhlobo lobuningi bejubane). Inzwa yokucindezela kokungenisa ithola ivolumu yokungenisa ayitholakali ngqo njengenzwa yokugeleza kokungenisa, kodwa itholakala ngokungaqondile. Ngesikhathi esifanayo, iphinde ithintwe yizici eziningi, ngakho-ke kunezindawo eziningi ezahlukene ekutholeni nasekugcinweni kwenzwa yokugeleza kokungenisa, futhi iphutha elikhiqizwe nalo linezici zalo ezikhethekile.
Inzwa yokucindezela kokungenisa ithola ukucindezela okuphelele kwe-manifold yokungenisa ngemuva kwe-throttle. Ithola ushintsho lokucindezela okuphelele ku-manifold ngokuya ngesivinini senjini kanye nomthwalo, bese iyiguqula ibe yi-voltage yesiginali bese iyithumela kuyunithi yokulawula injini (ECU). I-ECU ilawula inani eliyisisekelo lokufakwa kukaphethiloli ngokuya ngobukhulu be-voltage yesiginali.
Kunezinhlobo eziningi zezinzwa zokucindezela kokungena, njengohlobo lwe-varistor kanye nohlobo lwe-capacitive. I-Varistor isetshenziswa kabanzi ohlelweni lwe-D injection ngenxa yezinzuzo zayo ezifana nesikhathi sokuphendula esisheshayo, ukunemba okuphezulu kokutholwa, usayizi omncane kanye nokufakwa okuguquguqukayo.
Isithombe 1 sibonisa ukuxhumana phakathi kwenzwa yokucindezela kokungenisa i-varistor kanye nekhompyutha. Isithombe 2 sibonisa isimiso sokusebenza senzwa yokucindezela yohlobo lwe-varistor, kanti u-R ku-FIG. 1 yizithiyo zokucindezela u-R1, u-R2, u-R3 kanye no-R4 ku-FIG. 2, ezakha ibhuloho le-Wheatstone futhi ziboshwe ndawonye ne-silicon diaphragm. I-silicon diaphragm ingaguquguquka ngaphansi kwengcindezi ephelele ku-manifold, okuholela ekushintsheni kwenani lokumelana kokumelana kokucindezeleka u-R. Uma ingcindezi ephelele iphakeme ku-manifold, kulapho ukuguquguquka kwe-silicon diaphragm kukhulu futhi kulapho ushintsho olukhulu lwenani lokumelana lokumelana u-R. Okusho ukuthi, izinguquko zemishini ze-silicon diaphragm ziguqulwa zibe izimpawu zikagesi, ezikhuliswa yisekethe ehlanganisiwe bese zikhishwa ziye ku-ECU.
