Idivayisi nenqubo yokusebenza kwe-DMRV

Ukuqinisekisa inqubo ephelele yomlilo wephethiloli nokuhambisana nezindinganiso zemvelo ezicacisiwe, kuyadingeka ukunquma ngokunembile ngangokunokwenzeka ukugeleza komoya okunikezwa amasilinda enjini, kuya ngezindlela zokusebenza kwawo. Le nqubo ingalawulwa yiqoqo eliphelele lezinzwa: inzwa yokucindezela umoya, inzwa yokushisa, kodwa okuthandwa kakhulu yizinzwa zokuhamba komoya (MAF), kwesinye isikhathi ezibizwa nangokuthi imitha yokugeleza. Inzwa yokugeleza komoya omningi iqopha inani (lesisindo) lomoya ovela emkhathini lingene ezininginingi zokungeniswa kwenjini futhi lidlulise le datha kwiyunithi yokulawula ngogesi ukuze kubalwe okulandelayo kokunikezwa kukaphethiloli.

Izinhlobo nezici zamamitha wokugeleza

Incazelo yesifinyezo se-DMRV - inzwa yokugeleza komoya ngobuningi. Lo mshini usetshenziswa ezimotweni ezinenjini kaphethiloli nodizili. Itholakala ohlelweni lokungenisa phakathi kwesihlungi somoya ne-valve mpintsha futhi ixhuma enjini ye-ECU. Ekungabikho noma ukungasebenzi kahle kwemitha yokugeleza, ukubalwa kwenani lomoya ongenayo kwenziwa ngesikhundla se-valve mpintsha. Lokhu akunikezi isilinganiso esifanele, futhi ezimeni zokusebenza ezinzima, ukusetshenziswa kukaphethiloli kuyenyuka, ngoba ukuhamba komoya okukhulu kuyipharamitha eyinhloko yokubala inani likaphethiloli elifakiwe.

Umgomo wokusebenza kwenzwa yokugeleza komoya ngobuningi isuselwa ekulinganiseni izinga lokushisa lokugeleza komoya, ngakho-ke lolu hlobo lwemitha yokugeleza lubizwa ngokuthi yi-hot-wire anemometer. Izinhlobo ezimbili eziyinhloko zemishini yokugeleza komoya ngobuningi zihlukaniswe ngokwakhiwa:

• intambo (ucingo);
• ifilimu;
• uhlobo lwe-volumetric nge-valve butterfly (okwamanje ayisetshenziswanga).

Idizayini nomgomo wokusebenza kwegeji yocingo

INitievoy DMRV inedivayisi elandelayo:

• umzimba;
• isikali sokulinganisa;
• isici esibucayi - ucingo lweplathinamu;
• oshisayo;
• voltage transformer.

I-platinum filament ne-thermistor zombili ziyibhuloho eliphikisayo. Uma kungekho ukugeleza komoya, intambo yeplathinamu ifudunyezwa njalo ekushiseni okunqunyelwe ngaphambili ngokudlulisa amandla kagesi ngayo. Lapho i-valve mpintsha ivula futhi umoya uqala ukugeleza, into yokuzwa iyaphola, okunciphisa ukumelana kwayo. Lokhu kubangela ukuthi "ukushisa" kwamanje kukhule ukulinganisa ibhuloho.

Isiguquli siguqula ushintsho lwamanje kumanje lube ngamandla okukhipha, adluliselwa enjinini ye-ECU. Lesi sakamuva, ngokususelwa ebudlelwaneni obungewona obomugqa obukhona, kubalwa inani likaphethiloli onikezwe amakamelo omlilo.

Lo mklamo unenkinga eyodwa ephawulekayo - ngokuhamba kwesikhathi, kwenzeka ukungasebenzi kahle. Isici sokuzwa siyaphela futhi ukunemba kwaso kwehla. Bangangcola futhi, kepha ukuxazulula le nkinga, izinzwa zensimbi zokuhamba komoya ezifakwe ezimotweni zesimanje zinemodi yokuzihlanza. Kubandakanya ukufudumeza kwesikhashana kocingo kuye ku-1000 ° C lapho injini icishiwe, okuholela ekushisweni kokungcola okunqwabelene.

Isikimu nezici zefilimu i-DFID

Umgomo wokusebenza kwenzwa yefilimu ngezindlela eziningi ifana nenzwa yentambo. Kodwa-ke, kunokwehluka okuningana kulo mklamo. Esikhundleni sensimbi ye-platinum, kufakwa i-silicon crystal njengento ebucayi eyinhloko. Lesi sakamuva sine-platinum sputtering, equkethe izingqimba eziningana ze-thinnest (amafilimu). Isendlalelo ngasinye yisiphikisi esihlukile:

• Ukushisa;
• ama-thermistors (kukhona amabili awo);
• inzwa yokushisa komoya.

I-crystal ekhonjiwe ibekwe endlini exhunywe esiteshini sokuhambisa umoya. Inomklamo okhethekile okuvumela ukuthi ulinganise izinga lokushisa lokungenayo hhayi kuphela, kodwa nokugeleza okuboniswayo. Njengoba umoya umunxwa nge-vacuum, izinga lokugeleza liphezulu kakhulu, okuvimbela ukungcoliseka ekuqongeleleni entweni yokuzwa.

Njengaku-intambo yenzwa, into yokuzwa ishisa ize ifike kuzinga lokushisa elinqunyelwe kusengaphambili. Lapho umoya udlula kuma-thermistors, kuvela umehluko wezinga lokushisa, lapho kubalwa khona ubukhulu bokugeleza okuvela emkhathini. Emiklamo enjalo, isignali eya ku-injini ECU inganikezwa kokubili ngefomethi ye-analog (i-output voltage), nangefomethi yedijithali yesimanje futhi elula.

Imiphumela kanye nezimpawu zokungasebenzi kahle kwenzwa yokuhamba komoya

Njenganoma yiluphi uhlobo lwenzwa yenjini, ukungasebenzi kahle kwenzwa yokugeleza komoya ngobuningi kusho izibalo ezingalungile zenjini ye-ECU futhi, ngenxa yalokho, ukusebenza okungalungile kohlelo lokujova. Lokhu kungadala ukusetshenziswa uphethiloli ngokweqile noma, ngakolunye uhlangothi, ukunikezwa okunganele, okunciphisa amandla enjini.

Izimpawu ezigqame kakhulu zokungasebenzi kahle kwenzwa:

• Ukubukeka kwesiginali "Check Engine" kudeshibhodi yemoto.
• Ukwanda okuphawulekayo kokusetshenziswa kukaphethiloli ngesikhathi sokusebenza okujwayelekile.
• Ukwehlisa umfutho wokusheshisa injini.
• Ubunzima ngokuqala injini kanye nokuvela kokuma okuzenzakalelayo ekusebenzeni kwayo (iziteki zenjini).
• Ukusebenza kuphela ngeleveli ethile yejubane (ephansi noma ephezulu).

Uma uthola izimpawu zenkinga ngenzwa ye-MAF, zama ukuyikhubaza. Ukwanda kwamandla enjini kuzoba isiqiniseko sokonakala kwe-DMRV. Kulokhu, kuzodingeka ukuthi ihlanzwe noma ishintshwe. Kulokhu, kuyadingeka ukukhetha inzwa enconywe ngumkhiqizi wemoto (okungukuthi, eyangempela).