Momwe Mungayesere Sensor ya MAP ndi Multimeter (Chitsogozo cha Gawo ndi Gawo)

Sensa ya intake manifold absolute absolute (MAP) imazindikira kuthamanga kwa mpweya m'njira zambiri zomwe amamwa ndipo imalola galimotoyo kusintha kuchuluka kwa mpweya / mafuta. Sensa ya MAP ikakhala yoyipa, imatha kusokoneza magwiridwe antchito a injini kapena kuyambitsa kuwala kwa injini ya cheke. Imagwiritsa ntchito vacuum kuwongolera kuthamanga kosiyanasiyana. Kuthamanga kwapamwamba, kutsika kwa vacuum ndi kutulutsa mphamvu. Kukwera kwa vacuum ndi kutsika kwamphamvu, mphamvu yamagetsi imakwera. Ndiye mumayesa bwanji sensor ya MAP ndi DMM?

Chitsogozo ichi ndi sitepe chikuphunzitsani momwe mungayesere masensa a MAP ndi ma DMM.

Kodi MAP sensor imachita chiyani?

Sensa ya MAP imayesa kuchuluka kwa kuthamanga kwa mpweya molingana ndi vacuum yomwe ili munjira zambiri, mwina mwachindunji kapena kudzera papaipi ya vacuum. Kupanikizika kumasinthidwa kukhala siginecha yamagetsi, yomwe sensor imatumiza ku gawo lowongolera mphamvu (PCM), kompyuta yagalimoto yanu. (1)

Sensa imafunikira chizindikiro cha 5-volt kuchokera pakompyuta kuti ibwerere. Kusintha kwa vacuum kapena kuthamanga kwa mpweya muzolowera kumasintha kukana kwamagetsi kwa sensa. Izi zitha kuwonjezera kapena kuchepetsa mphamvu yamagetsi pakompyuta. PCM imasintha kutumiza kwa silinda yamafuta ndi nthawi yoyatsira kutengera kuchuluka komwe kulipo komanso liwiro la injini pogwiritsa ntchito chidziwitso chochokera ku sensa ya MAP ndi masensa ena.

Momwe mungayesere sensa ya MAP ndi multimeter

Nambala 1. Kufufuza koyambirira

Chitani cheke musanayese sensa ya MAP. Kutengera kukhazikitsidwa kwanu, sensa imalumikizidwa ndi kuchuluka kwa kudya kudzera pa hose ya rabara; apo ayi, imalumikizana mwachindunji ndi polowera.

Mavuto akachitika, payipi ya vacuum ndiyomwe imayambitsa vuto. Zomverera ndi ma hoses mu chipinda cha injini zimakumana ndi kutentha kwambiri, kuipitsidwa kwamafuta ndi petulo, komanso kugwedezeka komwe kungasokoneze magwiridwe antchito awo.

Yang'anani paipi yoyamwa:

• kupotoza
• zomangira zofooka
• ming'alu
• kutupa
• kufewetsa
• kuumitsa

Kenako yang'anani nyumba ya sensa kuti iwonongeke ndikuwonetsetsa kuti cholumikizira chamagetsi ndi cholimba komanso choyera ndipo mawayawa ali mudongosolo labwino kwambiri.

Waya wapansi, waya wolumikizira, ndi waya wamagetsi ndi mawaya atatu ofunikira kwambiri pa sensa yamagalimoto ya MAP. Komabe, masensa ena a MAP ali ndi mzere wachinayi wowongolera kutentha kwa mpweya.

Pankafunika kuti mawaya onse atatu azigwira ntchito bwino. Ndikofunikira kwambiri kuyang'ana waya aliyense payekhapayekha ngati sensa ili yolakwika.

No. 2. Kuyesa kwa waya wamagetsi

• Khazikitsani zosintha za voltmeter pa multimeter.
• Yatsani kiyi yoyatsira.
• Lumikizani chowongolera chofiira cha multimeter ku MAP sensor power lead (yotentha).
• Lumikizani kutsogolo kwakuda kwa multimeter ku cholumikizira cha batri.
• Mphamvu yowonetsedwa iyenera kukhala pafupifupi 5 volts.

Nambala 3. Mayeso a waya wa Signal

• Yatsani kiyi yoyatsira.
• Khazikitsani zosintha za voltmeter pa multimeter ya digito.
• Lumikizani waya wofiyira wa multimeter ku waya wolumikizira.
• Lumikizani kutsogolo kwakuda kwa multimeter pansi.
• Popeza kulibe mphamvu ya mpweya, waya wamagetsi amawerenga pafupifupi 5 volts pamene kuyatsa kwayatsa ndipo injini yazimitsa.
• Ngati waya wamagetsi ndi wabwino, multimeter iyenera kuwonetsa pafupifupi 1-2 volts injini ikayatsidwa. Mtengo wa waya wa chizindikiro umasintha chifukwa mpweya umayamba kuyenda munjira zambiri.

No. 4. Mayeso a waya pansi

• Pitirizani kuyatsa.
• Ikani ma multimeter pagulu la oyesa kupitiliza.
• Lumikizani njira ziwiri za DMM.
• Chifukwa cha kupitiriza, muyenera kumva beep pamene mawaya onse alumikizidwa.
• Kenako gwirizanitsani chingwe chofiira cha multimeter ku waya wapansi wa MAP sensor.
• Lumikizani kutsogolo kwakuda kwa multimeter ku cholumikizira cha batri.
• Mukamva beep, dera lapansi likugwira ntchito bwino.

No. 5. Kuyesa kwa waya kutentha kwa mpweya

• Khazikitsani multimeter kukhala voltmeter mode.
• Yatsani kiyi yoyatsira.
• Lumikizani waya wofiyira wa multimeter ku waya wolumikizira wa sensa ya kutentha kwa mpweya.
• Lumikizani kutsogolo kwakuda kwa multimeter pansi.
• Mtengo wa sensa ya IAT uyenera kukhala pafupifupi 1.6 volts pa kutentha kwa mpweya wa 36 digiri Celsius. (2)

Zizindikiro za MAP Sensor Yolephera

Kodi mungadziwe bwanji ngati muli ndi sensa yoyipa ya MAP? Mafunso otsatirawa ndi ofunika kuwadziwa:

Kuchuluka kwamafuta sikukufika pamlingo woyenera

Ngati ECM iwona mpweya wochepa kapena wopanda mpweya, imaganiza kuti injiniyo ili ndi katundu, imataya mafuta ambiri, ndikupititsa patsogolo nthawi yoyatsira. Izi zimabweretsa mtunda wokwera wa gasi, kusagwira ntchito bwino kwamafuta komanso, nthawi zambiri, kuphulika (kosowa kwambiri).

Mphamvu zosakwanira 

ECM ikazindikira vacuum yayikulu, imaganiza kuti injiniyo ndiyotsika, imachepetsa jekeseni wamafuta, ndikuchedwetsa nthawi yoyatsira. Kuonjezera apo, kugwiritsa ntchito mafuta kudzachepetsedwa, zomwe, mwachiwonekere, ndi chinthu chabwino. Komabe, ngati palibe mafuta okwanira omwe amawotchedwa, injiniyo ikhoza kusowa mathamangitsidwe ndi kuyendetsa mphamvu.

Ndizovuta kuyamba

Chifukwa chake, kusakaniza kolemera kwambiri kapena kowonda kumapangitsa kukhala kovuta kuyambitsa injini. Muli ndi vuto ndi sensa ya MAP ngati mutha kuyambitsa injini pomwe phazi lanu lili pa accelerator pedal.

Mayeso a umuna walephera

Sensa yoyipa ya MAP imatha kuchulukitsa mpweya chifukwa jekeseni wamafuta siwofanana ndi kuchuluka kwa injini. Kugwiritsa ntchito mafuta ochulukirapo kumabweretsa kuwonjezeka kwa mpweya wa hydrocarbon (HC) ndi carbon monoxide (CO), pomwe kusakwanira kwamafuta kumabweretsa kuwonjezeka kwa mpweya wa nitrogen oxide (NOx).

Onani zina mwazolemba zathu pansipa.

• Momwe Mungagwiritsire Ntchito Cen-Tech Digital Multimeter Kuwona Voltage
• Momwe mungayesere 3 waya camshaft sensor ndi multimeter
• Momwe mungayang'anire gawo lowongolera poyatsira ndi multimeter

ayamikira

(1) PCM - https://auto.howstuffworks.com/engine-control-module.htm

(2) kutentha - https://www.britannica.com/science/temperature