Zigawo zamagalimoto za Dongfeng Cummins intake pressure sensor 4921322

Manifold Absolute Pressure Sensor (MAP).

Imagwirizanitsa machubu olowera ndi chubu cha vacuum, ndipo ndi kuchuluka kwa liwiro la injini, imamva kusintha kwa vacuum mumitundu yambiri, kenako ndikuisintha kukhala siginecha yamagetsi kuchokera pakusintha kukana kwamkati kwa sensor kuti ECU ikonze. kuchuluka kwa jakisoni wamafuta ndi nthawi yoyatsira.

Mu injini ya EFI, sensa yamphamvu yolowera imagwiritsidwa ntchito kuti izindikire kuchuluka kwa mpweya, womwe umatchedwa D-mtundu wa jakisoni wamtundu (mtundu wa velocity density). Sensa ya mpweya wotengera mpweya imazindikira kuchuluka kwa mpweya m'malo molunjika ngati sensa yotulutsa mpweya. Panthawi imodzimodziyo, imakhudzidwanso ndi zinthu zambiri, kotero pali kusiyana kwakukulu pakati pa kuzindikira ndi kukonzanso kayendedwe ka mpweya wa mpweya, ndipo zolakwa zomwe zimayambitsidwa nazo zimakhalanso zapadera.

The intake pressure sensor imazindikira kukakamizidwa kotheratu kwa manifold olowa kumbuyo kwa throttle. Imazindikira kusintha kwa kukakamizidwa 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 mphamvu yamagetsi.

mfundo ya ntchito

Pali mitundu yambiri yamasensa omwe amalowetsa, monga varistor ndi capacitor. Chifukwa cha ubwino wa nthawi yoyankha mofulumira, kulondola kwapamwamba, kukula kochepa komanso kusinthika kosinthika, varistor amagwiritsidwa ntchito kwambiri mu D-mtundu wa jakisoni.

kapangidwe ka mkati

Chojambulira choponderezedwa chimagwiritsa ntchito chip pressure poyeza kupanikizika, ndipo chip chopondereza chimaphatikiza mlatho wa Wheatstone pa silicon diaphragm yomwe imatha kupundutsidwa ndi kukakamizidwa. Chip choponderezedwa ndicho maziko a sensa yothamanga, ndipo onse opanga makina opangira mphamvu ali ndi tchipisi tawo tokha, ena mwa iwo amapangidwa mwachindunji ndi opanga masensa, ena omwe ndi tchipisi chapadera (ASC) chopangidwa ndi kutulutsa. , ndipo chinacho ndikugula mwachindunji tchipisi tanthawi zonse kuchokera kwa akatswiri opanga tchipisi. Nthawi zambiri, tchipisi timene amapangidwa mwachindunji ndi opanga masensa kapena makonda a ASC tchipisi amangogwiritsidwa ntchito pazogulitsa zawo. Tchipisi izi ndizophatikizika kwambiri, ndipo chip pressure, amplifier circuit, chip processing signal, EMC chitetezo dera ndi ROM poyang'anira kutulutsa kwa sensa zonse zimaphatikizidwa mu chip chimodzi. Sensa yonse ndi chip, ndipo chip chimalumikizidwa ndi pini ya PIN ya cholumikizira kudzera mumayendedwe.