Sensor ea khatello ea moea (ManifoldAbsolutePressureSensor), eo hamorao e bitsoang MAP. E hokahane le mokelikeli o mongata oa ho kenya ka phapu ea vacuum. Ka meroalo e fapaneng ea lebelo la enjene, e khona ho utloa phetoho ea vacuum ka har'a mefuta e mengata ea ho noa, ebe e fetola phetoho ea khanyetso kahare ho sensor hore e be lets'oao la motlakase, le ka sebelisoang ke ECU ho lokisa palo ea ente le Angle ea nako ea ho tima.
Ka mochine oa EFI, mochine oa khatello ea ho kenngoa o sebelisoa ho lemoha molumo oa ho noa, o bitsoang D injection system (mofuta oa velocity density). Sensor ea khatello ea ho kenya e lemoha hore molumo oa ho noa ha o fumanoe ka ho toba joaloka mochine o kenang, empa o fumanoa ka tsela e sa tobang. Ka nako e ts'oanang, e boetse e angoa ke lintlha tse ngata, kahoo ho na le libaka tse ngata tse fapaneng tsa ho lemoha le ho hlokomeloa ho tloha ho sensor ea phallo ea ho kenya, 'me phoso e hlahisoang e boetse e na le tse khethehileng.
Sensor ea khatello ea ho kenya e lemoha khatello e feletseng ea manifold a ho noa ka morao ho throttle. E lemoha phetoho ea khatello e felletseng ka har'a manifold ho latela lebelo la enjene le mojaro, ebe e e fetolela ho motlakase oa lets'oao ebe o e romela ho unit control unit (ECU). ECU e laola palo ea ente ea peterole ea mantlha ho latela boholo ba motlakase oa lets'oao.
Ho na le mefuta e mengata ea li-sensor tsa khatello ea inlet, joalo ka mofuta oa varistor le mofuta oa capacitive. Varistor e sebelisoa haholo tsamaisong ea ente ea D ka lebaka la melemo ea eona e kang nako ea karabelo e potlakileng, ho nepahala ho phahameng ho lemoha, boholo bo fokolang le ho kenngoa habonolo.
Setšoantšo sa 1 se bontša kamano pakeng tsa varistor intake pressure sensor le k'homphieutha. FEIE. 2 e bonts'a molao-motheo oa ts'ebetso oa "varistor type inlet" sensor, le R ho FIG. 1 ke R1, R2, R3 le R4 ho FIG. 2, e etsang borokho ba Wheatstone mme e hokahane hammoho le silicon diaphragm. The silicon diaphragm ka deform tlas'a khatello e feletseng ka manifold, ho fella ka phetoho ea ho hanyetsa boleng ba khatello ea khatello ea R. E phahameng ka ho feletseng khatello e feletseng ka manifold, e kholoanyane deformation ea silicon diaphragm le ho feta phetoho ea. boleng ba ho hanyetsa ba ho hanyetsa R. Ke hore, liphetoho tsa mechine ea silicon diaphragm li fetoloa lipontšo tsa motlakase, tse matlafatsoang ke potoloho e kopanetsoeng ebe e hlahisoa ho ECU.
