Sensor ya kuthamanga kwa mpweya (ManifoldAbsolutePressureSensor), yomwe imatchedwa MAP.Imalumikizidwa ndi machubu olowera ndi vacuum chubu.Ndi katundu wosiyanasiyana wa liwiro la injini, imatha kuzindikira kusintha kwa vacuum mu kuchuluka kwa mayamwidwe, ndiyeno kutembenuza kusintha kwa kukana mkati mwa sensa kukhala chizindikiro chamagetsi, chomwe chingagwiritsidwe ntchito ndi ECU kukonza kuchuluka kwa jakisoni ndi nthawi yoyatsira.
Mu injini ya EFI, mphamvu yogwiritsira ntchito mphamvu imagwiritsidwa ntchito kuti izindikire kuchuluka kwa kudya, komwe kumatchedwa D jakisoni dongosolo (mtundu wa velocity density).Sensa yothamanga imazindikira kuti kuchuluka kwa kulowetsedwa sikudziwika mwachindunji monga cholumikizira cholumikizira, koma chosadziwika.Panthawi imodzimodziyo, imakhudzidwanso ndi zinthu zambiri, kotero pali malo ambiri osiyana pozindikira ndi kukonza kuchokera ku sensa yothamanga, ndipo cholakwika chomwe chimapangidwa chimakhalanso ndi mawonekedwe ake.
The intake pressure sensor imazindikira kukakamizidwa kotheratu kwa manifold olowa kumbuyo kwa throttle.Imazindikira kusintha kwa kupanikizika kotheratu muzobwezeredwa molingana ndi liwiro la injini ndi katundu, kenako ndikuisintha kukhala voteji yamagetsi ndikuitumiza kugawo lowongolera injini (ECU).ECU imayang'anira kuchuluka kwa jakisoni wamafuta malinga ndi kukula kwa voteji.
Pali mitundu yambiri yama sensor olowera, monga mtundu wa varistor ndi mtundu wa capacitive.Varistor imagwiritsidwa ntchito kwambiri mu jekeseni wa D chifukwa cha ubwino wake monga nthawi yoyankha mofulumira, kulondola kwapamwamba, kukula kochepa komanso kusinthika kosinthika.
Chithunzi 1 chikuwonetsa kulumikizana pakati pa varistor intake pressure sensor ndi kompyuta.CHITH.2 ikuwonetsa mfundo yogwirira ntchito yamtundu wa varistor type inlet pressure sensor, ndi R mu FIG.1 ndiye zopinga za R1, R2, R3 ndi R4 mu FIG.2, yomwe imapanga mlatho wa Wheatstone ndipo imalumikizidwa pamodzi ndi silicon diaphragm.The silicon diaphragm akhoza kupunduka pansi pa kupsyinjika mtheradi mu zobwezedwa zambiri, kuchititsa kusintha kukana mtengo wa kupsyinjika kukana R. Kukwera kwamphamvu mtheradi kupanikizika mu zobwezedwa zambiri, ndi mapindikidwe kukulira kwa silicon diaphragm ndi kusintha kwakukulu kwa mtengo wotsutsa wa kukana R. Ndiko kuti, kusintha kwa makina a silicon diaphragm kumasinthidwa kukhala zizindikiro zamagetsi, zomwe zimakulitsidwa ndi dera lophatikizika ndikutuluka ku ECU.
