Inzwa yokucindezela kokuthatha komoya (ManifoldAbsolutePressureSensor), ngemuva kwalokhu ebizwa ngokuthi I-MAP. Ixhunywe ku-multifold intake nge-vacuum tube. Ngokulayishwa okuhlukile kwesivinini senjini, ingakwazi ukuzwa ukuguquka kwe-vacuum endaweni eningi yokudonsa, bese iguqula ushintsho lokumelana ngaphakathi kwenzwa ibe isignali kagesi, engasetshenziswa i-ECU ukulungisa inani lomjovo kanye ne-Engeli yesikhathi yokubasa.
Enjinini ye-EFI, inzwa yokucindezela kokuthatha isetshenziselwa ukuthola ivolumu yokungena, ebizwa ngokuthi i-D injection system (uhlobo lwe-velocity density). Inzwa yokucindezela kokuthatha ithola ivolumu yokuthatha ayitholakali ngokuqondile njengenzwa yokugeleza kokuthatha, kodwa itholwe ngokungaqondile. Ngesikhathi esifanayo, iphinde ithintwa yizici eziningi, ngakho-ke kunezindawo eziningi ezihlukene ekutholweni nasekugcinweni kwenzwa yokugeleza kokuthatha, futhi iphutha elikhiqiziwe libuye libe nemininingwane yalo.
Inzwa yokucindezela kokuthatha ithola ingcindezi ephelele ye-multitake manifold ngemuva kwe-throttle. Ibona ukuguqulwa komfutho ophelele ku-manifold ngokwejubane nomthwalo wenjini, bese iyiguqulela kugesi wesignali bese iyithumela kuyunithi yokulawula injini (ECU). I-ECU ilawula inani eliyisisekelo lomjovo kaphethiloli ngokuya ngosayizi wevolthi yesiginali.
Kunezinhlobo eziningi zezinzwa ze-inlet pressure, njengohlobo lwe-varistor kanye nohlobo lwe-capacitive. I-Varistor isetshenziswa kakhulu ohlelweni lomjovo we-D ngenxa yezinzuzo zayo ezifana nesikhathi sokuphendula esisheshayo, ukunemba kokutholwa okuphezulu, usayizi omncane nokufakwa okuguquguqukayo.
Umfanekiso 1 ubonisa ukuxhumana phakathi kwe-varistor intake pressure sensor kanye nekhompyutha. I-FIG. 2 ikhombisa isimiso sokusebenza senzwa yokucindezela kwe-varistor ye-inlet, kanye no-R ku-FIG. I-1 yi-strain resistors engu-R1, u-R2, u-R3 no-R4 ku-FIG. 2, akha ibhuloho le-Wheatstone futhi ahlanganiswe ne-silicon diaphragm. I-silicon diaphragm ingakhubaza ngaphansi kwengcindezi ephelele ku-manifold, okuholela ekushintsheni kwenani lokumelana lokumelana nokucindezeleka R. Ukuphakama kwengcindezi ephelele ku-manifold, kukhulu ukuguquguquka kwe-silicon diaphragm kanye noshintsho olukhulu inani lokumelana lokumelana R. Okungukuthi, izinguquko zemishini ye-silicon diaphragm ziguqulwa zibe amasignali kagesi, akhuliswa yi-integrated bese ukhipha ku-ECU
