Kodi ntchito ya sensa yoyatsira mpweya m'galimoto ndi yotani?
Ntchito yaikulu ya sensa ya kuthamanga kwa injini (MAP sensor) ndikuwunika kuthamanga konse mu manifold a injini ndikusintha chizindikiro cha kuthamanga kukhala chizindikiro chamagetsi chomwe chimayenera kutumizidwa ku ECU ya injini (Electronic Control Unit), chomwe chimagwira ntchito ngati maziko ofunikira kuti ECU iwerengere kuchuluka kwa mafuta omwe amalowa ndi Angle yoyatsira moto.
Mfundo zake zenizeni zogwirira ntchito komanso kukulitsa ntchito zitha kugawidwa m'magawo awiri otsatirawa:
Kuthamanga kwa injini komwe kumakhudza mafuta kumasintha pa liwiro ndi katundu wosiyanasiyana pamene mafuta akugwirizana ndi mikhalidwe yosiyanasiyana yogwirira ntchito. Mwachitsanzo, pamene kutsegula kwa throttle kuli kwakukulu (pa katundu wolemera), kuthamanga kwa throttle kumakhala kwakukulu, ndipo ECU imawonjezera kuchuluka kwa mafuta omwe amalowetsa kutengera chizindikiro cha sensa. Pamene kutsegula kwa throttle kuli kochepa (pa katundu wochepa), kuthamanga kumakhala kochepa, ndipo ECU imachepetsa kuchuluka kwa mafuta omwe amalowetsa kuwonetsetsa kuti chiŵerengero cha mpweya ndi mafuta cha injini chikhalebe mkati mwa mulingo woyenera pansi pa mikhalidwe yosiyanasiyana yogwirira ntchito ndikuwonjezera mphamvu yoyaka.
Mu injini yokhala ndi turbocharging, sensa yowunikira kuthamanga kwa mpweya ingathandizenso kuyang'anira ngati kuthamanga kwa mpweya kuli bwino, kupewa kuthamanga kwambiri kwa mpweya kuti kusamachititse injini kulephera kugwira ntchito. Mitundu ina imaphatikizanso zizindikiro zake kuti iwonjezere mphamvu yowongolera mpweya komanso kuyeretsa utsi.
Zolakwika zodziwika bwino za masensa othamanga a intake automotive (MAP sensors) ndi zizindikiro zofananira za galimoto zimagwera m'magulu otsatirawa:
Vuto la dera la sensor
Izi zikuphatikizapo zinthu monga ma short circuits, ma open circuits, ma oxidized plugs, ndi kusagwirizana bwino.
Zizindikiro zofanana: Liwiro la injini losakhazikika, kuthamanga kofooka, ndipo pazochitika zazikulu, kuyima kungachitike. ECU ikhoza kulemba khodi yolakwika ndikuyatsa chizindikiro cha vuto la injini.
Zigawo zamkati mwa sensa zawonongeka
Vuto lalikulu ndi kulephera kwa zinthu monga chip yozindikira kupanikizika ndi dera lokulitsa chizindikiro cha sensa, zomwe zimapangitsa kuti zikhale zosatheka kuyankha molondola chizindikiro cha kupanikizika kwa intake.
Zizindikiro zofanana: Kusawerengera molondola kuchuluka kwa mafuta omwe amalowetsedwa, zomwe zimapangitsa kuti pakhale kusakaniza kolemera kwambiri kapena kosalimba. Kusakanizako kukakhala kolemera kwambiri, utsi wakuda umatuluka mu chitoliro chotulutsa utsi ndipo kugwiritsa ntchito mafuta kumawonjezeka. Kusakanizako kukakhala kosalimba kwambiri, mphamvu ya injini imachepa ndipo moto umabwereranso.
Malo olowera mpweya a sensa atsekedwa kapena akutuluka
Sensa imalumikizidwa ku intake manifold kudzera mu chubu cha vacuum. Ngati chubu cha vacuum chatsekeka, chapindika kapena chikutuluka, chidzapangitsa kuti chizindikiro cha kuthamanga chomwe chasonkhanitsidwa ndi sensa chisokonezeke.
Zizindikiro zofanana: kugwedezeka kosagwira ntchito, kuchedwa kwa liwiro. Ma model ena amatha kukhala ndi liwiro losagwira ntchito lomwe ndi lalikulu kwambiri kapena lotsika kwambiri.
Kusuntha kwa chizindikiro cha sensor
Imeneyi ndi vuto lobisika. Sensa sinalepheretsedwe kwathunthu, koma chizindikiro chotulutsa chimasiyana ndi zomwe zili bwino.
Zizindikiro zofanana: Galimotoyo siisonyeza zizindikiro zomveka bwino za vuto, koma mavuto monga kuchuluka kwa mafuta komanso kuchepa kwa mphamvu angachitike. Mavutowa amatha kupezeka pogwiritsa ntchito chida chowunikira kuti awerenge deta.
Kuti mudziwe ngati chizindikiro cha sensa ya kuthamanga kwa magazi ya galimoto (MAP sensor) ndi chabwinobwino, pali njira ziwiri zazikulu: kuwerenga deta pogwiritsa ntchito chida chodziwira matenda ndikuyesa mphamvu yamagetsi/kukana ndi multimeter. Ntchito yeniyeni ndi iyi:
I. Kuwerenga deta pogwiritsa ntchito chida chodziwira matenda (chomwe chimagwiritsidwa ntchito kwambiri komanso cholondola)
Lumikizani chida chodziwira matenda a galimoto ku mawonekedwe a OBD a galimotoyo, lowetsani makina owongolera injini, sankhani ntchito ya "Werengani Data Stream", ndipo pezani chinthu cha "Intake Manifold Absolute Pressure".
Yerekezerani kuchuluka kwa kuthamanga kwa magalimoto pansi pa mikhalidwe yosiyanasiyana yogwirira ntchito kuti muwone ngati akugwera muyeso wokhazikika (miyezo ingasiyane pang'ono pakati pa mitundu yosiyanasiyana ya magalimoto, chonde onani buku lothandizira kukonza)
Kusagwira ntchito: Kupanikizika kwabwinobwino nthawi zambiri kumakhala pakati pa 20 ndi 40kPa.
Ngati mphamvu ya throttle yotseguka mokwanira (kuthamanga mwadzidzidzi), mphamvu ya kupanikizika idzakwera mofulumira kufika pa 80 mpaka 100kPa (pafupi ndi mphamvu yakunja ya mlengalenga).
Chotsani chubu chopanda mpweya cha sensa: Kupanikizika kudzakwera nthawi yomweyo, kuyandikira kuthamanga kwa mpweya wakunja, kusonyeza kuti sensa ndi payipi zikuyenda bwino.
Ngati mitengo ya deta ikukhalabe yokhazikika nthawi zonse, ikusiyana kwambiri ndi muyezo, kapena isayankhe kusintha kwa magwiridwe antchito, zimasonyeza kuti chizindikiro cha sensa sichili bwino.
2. Yesani magetsi pogwiritsa ntchito multimeter (yoyenera kuthetsa mavuto ndi manja)
Pezani pulagi ya sensa ya MAP. Kawirikawiri, sensa imakhala ndi mawaya atatu: chingwe chamagetsi (5V), waya wapansi, ndi waya wa chizindikiro.
Tembenuzani choyatsira moto pamalo a "ON" (musayatse injini), ndipo yesani ndi DC voltage range ya multimeter:
Voltage pakati pa chingwe chamagetsi ndi waya wapansi iyenera kukhala pafupifupi 5V (ngati voltage ili 0 kapena yotsika kwambiri, imasonyeza vuto la magetsi mu chingwe kapena ECU).
Mphamvu yamagetsi pakati pa mzere wa chizindikiro ndi mzere wapansi nthawi zambiri imakhala ma volts 0.5 mpaka 1.5 pa liwiro lopanda ntchito. Mphete ikatsegulidwa kwathunthu, mphamvu yamagetsi imakwera kufika pa ma volts 3.5 mpaka 4.5.
Mukayamba injini, kanikizani pang'onopang'ono pedal ya accelerator ndikuwona ngati magetsi a mzere wa chizindikiro akukwera pang'onopang'ono pamene kutsegula kwa throttle kukukwera. Ngati magetsi sakusintha, akudumpha kapena kupitirira malire, zimasonyeza kuti chizindikiro cha sensa sichili bwino.
III. Njira Zothandizira Kuweruza
Yang'anani vuto la galimoto: Ngati galimotoyo ikuwonetsa liwiro losakhazikika, kuthamanga pang'ono, kugwiritsa ntchito mafuta ambiri, komanso kuwala kwa galimotoyo kuli koyatsidwa, ndipo khodi yolakwika imawerengedwa kuti "P0106/P0107/P0108" (khodi yolakwika yokhudzana ndi sensa ya kuthamanga kwa intake), ndizotheka kuti chizindikiro cha sensayo sichili bwino.
Yang'anani chubu chotsukira mpweya: Chotsani chubu chotsukira mpweya cholumikizidwa ku sensa kuti muwone ngati pali kutsekeka, ming'alu kapena kusweka kulikonse. Ngati chubu chotsukira mpweya chikutuluka, chidzapangitsa kuti chizindikiro cha kuthamanga chomwe chasonkhanitsidwa ndi sensa chisokonezeke ndikuweruzidwa molakwika ngati chizindikiro chosazolowereka.
Ngati mukufuna kudziwa zambiri, pitirizani kuwerenga nkhani zina patsamba lino!
Chonde tiimbireni foni ngati mukufuna zinthu zotere.
Malingaliro a kampani Zhuo Meng Shanghai Auto Co., Ltd. yadzipereka kugulitsa MG&MAXUSzida zamagalimoto zalandiridwa kugula.
