Pūoko pēhanga hau whakauru (ManifoldAbsolutePressureSensor), e kiia nei i muri nei ko te MAP. E honoa ana ki te manifold whakauru mā te whakamahi i tētahi ngongo korehau. Mēnā he rerekē ngā kawenga tere miihini, ka taea e ia te rongo i te huringa korehau i roto i te manifold whakauru, kātahi ka huri i te huringa ātete i roto i te pūoko hei tohu ngaohiko, ka taea te whakamahi e te ECU hei whakatika i te nui o te werohanga me te koki wā mura.
I roto i te miihini EFI, ka whakamahia te pūoko pēhanga whakauru hei kite i te rahinga whakauru, e kiia nei ko te pūnaha werohanga D (momo kiato tere). Ka kitea e te pūoko pēhanga whakauru te rahinga whakauru kāore i te kitea tika pērā i te pūoko rere whakauru, engari i te kitea ā-kore. I taua wā anō, he maha ngā āhuatanga e pāngia ana, nō reira he maha ngā wāhi rerekē i roto i te kitenga me te tiaki mai i te pūoko rere whakauru, ā, he āhuatanga motuhake anō hoki te hapa i puta.
Ka kitea e te pūoko pēhanga whakauru te pēhanga tino o te manifold whakauru i muri i te pūwero. Ka kitea e ia te huringa o te pēhanga tino i roto i te manifold e ai ki te tere me te kawenga o te miihini, kātahi ka hurihia hei ngaohiko tohu ka tukuna ki te waeine whakahaere miihini (ECU). Ka whakahaerehia e te ECU te nui o te werohanga wahie taketake e ai ki te rahi o te ngaohiko tohu.
He maha ngā momo pūoko pēhanga tomo, pērā i te momo varistor me te momo capacitive. He whānuitia te whakamahinga o te Varistor i roto i te pūnaha werohanga D nā ōna painga pērā i te tere o te urupare, te tika o te kitenga, te iti o te rahi me te ngāwari o te tāutanga.
E whakaatu ana te Pikitia 1 i te hononga i waenga i te pūoko pēhanga whakauru varistor me te rorohiko. E whakaatu ana te Pikitia 2 i te kaupapa mahi o te pūoko pēhanga whakauru momo varistor, ā, ko R i te Pikitia 1 ko ngā ātete totoro R1, R2, R3 me te R4 i te Pikitia 2, e hanga ana i te piriti Wheatstone, ā, e honoa ana ki te diaphragm silicon. Ka taea e te diaphragm silicon te huri i raro i te pēhanga tino i roto i te manifold, ka hua ake te huringa o te uara ātete o te ātete totoro R. Ko te teitei ake o te pēhanga tino i roto i te manifold, ko te nui ake o te huringa o te diaphragm silicon, ā, ko te nui ake o te huringa o te uara ātete o te ātete R. Arā, ka hurihia ngā huringa ā-pūkaha o te diaphragm silicon hei tohu hiko, ka whakanuia e te ara iahiko whakauru, kātahi ka tukuna ki te ECU.
