Indlela Yokuhlola Inzwa Ye-MAP nge-Multimeter (Isinyathelo Ngesinyathelo)

Inzwa ye-absolute absolute pressure (MAP) ethathayo ithola umfutho womoya endaweni eningi ewuthathayo futhi ivumela imoto ukuthi iguqule isilinganiso somoya/samafutha. Uma inzwa ye-MAP iyimbi, ingehlisa ukusebenza kwenjini noma ibangele ukukhanya kwenjini yokuhlola ukuthi kukhanye. Isebenzisa i-vacuum ukulawula ingcindezi eningi. Lapho ingcindezi iphezulu, i-vacuum ne-voltage ephumayo iyancipha. Lapho i-vacuum iphakeme futhi ingcindezi iphansi, iphezulu ukuphuma kwe-voltage. Ngakho uyihlola kanjani inzwa ye-MAP nge-DMM?

Lo mhlahlandlela wesinyathelo ngesinyathelo uzokufundisa ukuthi ungazihlola kanjani izinzwa ze-MAP ngama-DMM.

Yenzani inzwa ye-MAP?

Inzwa ye-MAP ikala inani lokucindezela komoya ngokulingana ne-vacuum endaweni eningi yokuthatha, ngokuqondile noma ngepayipi le-vacuum. Ingcindezi ibe isiguqulelwa isignali kagesi, inzwa eyithumela kumojula yokulawula amandla (PCM), ikhompuyutha yemoto yakho. (1)

Inzwa idinga isignali eyireferensi engu-5-volt kusukela kukhompyutha ukuze ibuyisele ukunyakaza. Izinguquko ku-vacuum noma ingcindezi yomoya endaweni eningi yokuthathayo ishintsha ukumelana nogesi kwenzwa. Lokhu kungakhuphula noma kwehlise i-voltage yesiginali kukhompuyutha. I-PCM ilungisa ukulethwa kukaphethiloli kwesilinda nesikhathi sokuvutha ngokusekelwe ekulayisheni kwamanje nesivinini senjini isebenzisa ulwazi olusuka kunzwa ye-MAP nezinye izinzwa.

Ungahlola kanjani inzwa yemephu nge-multimeter

No. 1. Ukuhlola kokuqala

Yenza ukuhlola kwangaphambili ngaphambi kokuhlola inzwa ye-MAP. Ngokuya ngokusetha kwakho, inzwa ixhunywe ku-multifold intake nge-hose yerabha; ngaphandle kwalokho, ixhuma ngqo endaweni yokungena.

Lapho kuphakama izinkinga, i-vacuum hose cishe iyona esolwa kakhulu. Izinzwa namapayipi endaweni yenjini achayeka emazingeni okushisa aphezulu, okungenzeka ukuthi angangcoliswa uwoyela nophethiloli, nokudlidliza okungaphazamisa ukusebenza kwazo.

Hlola ipayipi lokumunca:

• twist
• izibopho ezibuthakathaka
• imifantu
• isimila
• ukuthambisa
• ukuqina

Bese uhlola indlu yezinzwa ukuze uthole umonakalo futhi uqiniseke ukuthi isixhumi sikagesi siqinile futhi sihlanzekile futhi izintambo zisebenza ngokuhlelekile.

Intambo yaphansi, intambo yesiginali, nentambo yamandla kuyizintambo ezintathu ezibaluleke kakhulu zenzwa ye-MAP yezimoto. Kodwa-ke, ezinye izinzwa ze-MAP zinomugqa wesiginali wesine wesilawuli sezinga lokushisa lomoya wokungenisa.

Kwakudingeka ukuthi zontathu izintambo zisebenze kahle. Kubaluleke kakhulu ukuhlola intambo ngayinye uma ngabe inzwa inephutha.

No. 2. Ukuhlolwa kwentambo yamandla

• Setha izilungiselelo ze-voltmeter ku-multimeter.
• Vula ukhiye wokuthungela.
• Xhuma umkhondo obomvu we-multimeter ku-MAP sensor power lead (hot).
• Xhuma umkhondo omnyama we-multimeter kusixhumi esiphansi sebhethri.
• I-voltage ebonisiwe kufanele ibe cishe ama-volts angu-5.

No. 3. Ukuhlolwa kwentambo yesiginali

• Vula ukhiye wokuthungela.
• Setha izilungiselelo ze-voltmeter ku-multimeter yedijithali.
• Xhuma umkhondo obomvu we-multimeter kuntambo yesiginali.
• Xhuma umkhondo omnyama we-multimeter emhlabathini.
• Njengoba kungekho mfutho womoya, intambo yesiginali izofunda cishe amavolthi angu-5 lapho ukuthungela kuvuliwe futhi injini icishiwe.
• Uma ucingo lwesignali luhle, i-multimeter kufanele ibonise cishe ama-volts angu-1-2 lapho injini ivuliwe. Inani lezintambo zesignali liyashintsha ngoba umoya uqala ukuhamba endaweni eningi yokuthatha.

No. 4. Ukuhlolwa kwe-Ground wire

• Gcina ukuthungela kuvuliwe.
• Faka i-multimeter kusethi yabahloli bokuqhubeka.
• Xhuma imikhondo emibili ye-DMM.
• Ngenxa yokuqhubeka, kufanele uzwe ibhiphu lapho zombili izintambo zixhunyiwe.
• Bese uxhuma umkhondo obomvu we-multimeter kuntambo yaphansi yenzwa ye-MAP.
• Xhuma umkhondo omnyama we-multimeter kusixhumi esiphansi sebhethri.
• Uma uzwa ibhiphu, isifunda saphansi sisebenza kahle.

No. 5. Ukuhlolwa kwentambo yezinga lokushisa lomoya

• Setha i-multimeter kumodi ye-voltmeter.
• Vula ukhiye wokuthungela.
• Xhuma intambo ebomvu ye-multimeter kuntambo yesiginali yenzwa yokushisa komoya oyithathayo.
• Xhuma umkhondo omnyama we-multimeter emhlabathini.
• Inani lenzwa ye-IAT kufanele libe ngu-1.6 volts ezingeni lokushisa lomoya elingu-36 degrees Celsius. (2)

Izimpawu Zenzwa Ye-MAP Eyehlulekile

Ungasho kanjani ukuthi unenzwa ye-MAP embi? Okulandelayo imibuzo ebalulekile okufanele uyiqaphele:

Ukonga kwesibaseli akukho ezingeni

Uma i-ECM ithola ileveli yomoya ephansi noma engekho, icabanga ukuthi injini ingaphansi komthwalo, ilahla uphethiloli owengeziwe, futhi ithuthukisa isikhathi sokuthungela. Lokhu kubangela i-gas mileage ephezulu, ukusebenza kahle kukaphethiloli okuphansi futhi, ezimweni ezimbi kakhulu, ukuqhuma (okungavamile kakhulu).

Amandla anganele 

Lapho i-ECM ithola ivacuum ephezulu, icabanga ukuthi injini iphansi, yehlisa umjovo kaphethiloli, futhi ibambezela isikhathi sokubasa. Ngaphezu kwalokho, ukusetshenziswa kukaphethiloli kuzoncishiswa, okuyinto, ngokusobala, into enhle. Kodwa-ke, uma ungashiswa uphethiloli owanele, injini ingase iswele ukusheshisa namandla okushayela.

Kunzima ukuqala

Ngakho-ke, ingxube enothe ngendlela engavamile noma ezondile yenza kube nzima ukuqala injini. Unenkinga ngenzwa ye-MAP uma ungakwazi ukuqala injini kuphela uma unyawo lwakho luku-accelerator pedal.

Ukuhlola ukukhishwa kwehlulekile

Inzwa ye-MAP embi ingakhuphula ukukhishwa kwekhabhoni ngoba umjovo kaphethiloli awulingani nomthwalo wenjini. Ukusetshenziswa kukaphethiloli ngokweqile kuholela ekwenyukeni kokukhishwa kwe-hydrocarbon (HC) ne-carbon monoxide (CO), kuyilapho ukusetshenziswa kukaphethiloli okunganele kuholela ekwandeni kokukhishwa kwe-nitrogen oxide (NOx).

Bheka ezinye zezihloko zethu ngezansi.

• Isetshenziswa Kanjani I-Cen-Tech Digital Multimeter ukuze Uhlole I-Voltage
• Indlela yokuhlola inzwa ye-camshaft ye-3 wire nge-multimeter
• Ungahlola kanjani iyunithi yokulawula ukushisa nge-multimeter

Izincomo

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

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