Isivamvo soxinzelelo lokuthatha umoya (ManifoldAbsolutePressureSensor), emva koku kubhekiselwa kuyo njenge-MAP. Idityaniswe kwi-manifold yokuthatha ngetyhubhu yokufunxa. Ngomthwalo ohlukeneyo wesantya se-injini, inokubona utshintsho lwe-vacuum kwindawo eninzi yokuthatha, emva koko iguqule utshintsho lokuchasa ngaphakathi kwinzwa ibe ngumqondiso wombane, onokuthi usetyenziswe yi-ECU ukulungisa isixa sokutofa kunye ne-Angle yexesha lokutshisa.
Kwi-injini ye-EFI, i-sensor yoxinzelelo lwe-intake isetyenziselwa ukufumanisa umthamo wokungena, obizwa ngokuba yi-D injection system (uhlobo lwe-velocity density). I-sensor yoxinzelelo lwe-intake ibona umthamo wokuthatha awubonakali ngokuthe ngqo njengenzwa yokungena, kodwa ifunyenwe ngokungathanga ngqo. Kwangaxeshanye, ikwachatshazelwa zizinto ezininzi, ngoko ke kukho iindawo ezininzi ezahlukeneyo ekubhaqweni nasekugcinweni kwinzwa yokungena, kwaye impazamo eyenziweyo inobungcali bayo.
Inzwa yoxinzelelo lwe-intake ibona uxinzelelo olupheleleyo lwe-manifold intake emva kwe-throttle. Ibona utshintsho loxinzelelo olupheleleyo kwi-manifold ngokwesantya kunye nomthwalo we-injini, emva koko iyiguqule ibe ngumbane wesignali kwaye iyithumele kwiyunithi yokulawula injini (ECU). I-ECU ilawula ubungakanani benaliti yamafutha esisiseko ngokobungakanani bombane wesignali.
Kukho iintlobo ezininzi zeenzwa zoxinzelelo lokungena, ezifana nohlobo lwe-varistor kunye nohlobo lwe-capacitive. I-Varistor isetyenziswe ngokubanzi kwi-D injection system ngenxa yeenzuzo zayo ezifana nexesha lokuphendula ngokukhawuleza, ukuchaneka kokuchaneka okuphezulu, ubungakanani obuncinci kunye nofakelo oluguquguqukayo.
Umzobo 1 ubonisa uxhulumaniso phakathi kwe-varistor intake pressure sensor kunye nekhompyutheni. IKHIWANE. I-2 ibonisa umgaqo osebenzayo we-varistor type inlet pressure sensor, kunye ne-R kwi-FIG. I-1 yi-strain resistors i-R1, i-R2, i-R3 kunye ne-R4 kwi-FIG. 2, eyenza ibhulorho yeWheatstone kwaye idityaniswe kunye ne-silicon diaphragm. I-silicon diaphragm inokukhubazeka phantsi koxinzelelo olupheleleyo kwi-manifold, okukhokelela ekutshintsheni kwexabiso lokumelana nokuxhatshazwa kwe-R. Iphakamileyo yoxinzelelo olupheleleyo kwi-manifold, i-deformation enkulu ye-silicon diaphragm kunye noshintsho olukhulu ixabiso lokumelana nokumelana ne-R. Oko kukuthi, utshintsho lomatshini lwe-silicon diaphragm luguqulwa lube yimiqondiso yombane, eyandisiweyo yisekethe edibeneyo kwaye emva koko iphuma kwi-ECU.
