Sensa ya okosijeni (Lambda probe)

Sensa ya oxygen (OC), yomwe imadziwikanso kuti lambda probe, imayesa kuchuluka kwa okosijeni mumipweya yotulutsa mpweya potumiza chizindikiro kugawo lowongolera injini (ECU).

Kodi sensa ya oxygen ili kuti

Kutsogolo mpweya kachipangizo DK1 anaika mu zobweleza zobweleza kapena kutsogolo utsi chitoliro pamaso chothandizira chosinthira. Monga mukudziwira, chosinthira chothandizira ndiye gawo lalikulu la makina owongolera magalimoto.

Kumbuyo kwa lambda probe DK2 imayikidwa mu utsi pambuyo pa chosinthira chothandizira.

Pa injini za 4-silinda, osachepera ma probe awiri a lambda amaikidwa. V6 ndi V8 injini ali osachepera anayi O2 masensa.

ECU imagwiritsa ntchito chizindikiro kuchokera kutsogolo kwa mpweya wa oxygen kuti isinthe mpweya / mafuta osakaniza powonjezera kapena kuchepetsa kuchuluka kwa mafuta.

Chizindikiro chakumbuyo cha oxygen chimagwiritsidwa ntchito kuwongolera magwiridwe antchito a chosinthira chothandizira. M'magalimoto amakono, m'malo mwa kutsogolo kwa lambda probe, sensor ya air-fuel ratio imagwiritsidwa ntchito. Zimagwira ntchito mofananamo, koma molondola kwambiri.

Momwe sensor ya oxygen imagwirira ntchito

Pali mitundu ingapo ya ma probes a lambda, koma kuphweka, m'nkhaniyi tingoganizira za masensa afupiafupi omwe amapanga magetsi.

Monga momwe dzinalo likusonyezera, voteji yomwe imatulutsa mpweya wa okosijeni imapanga kamagetsi kakang'ono kolingana ndi kusiyana kwa kuchuluka kwa mpweya mu mpweya wotulutsa mpweya ndi mpweya wotulutsa mpweya.

Kuti agwire bwino ntchito, kafukufuku wa lambda ayenera kutenthedwa mpaka kutentha kwina. Sensa yamakono yamakono imakhala ndi chotenthetsera chamkati chamagetsi chomwe chimayendetsedwa ndi injini ECU.

Pamene mafuta-mpweya osakaniza (FA) kulowa injini ndi Taonda (mafuta pang'ono ndi mpweya wambiri), mpweya wochuluka umakhalabe mu mpweya wotulutsa mpweya, ndipo kachipangizo ka mpweya kamatulutsa mpweya wochepa kwambiri (0,1-0,2 V).

Ngati ma cell amafuta ali olemera (mafuta ochulukirapo komanso mpweya wokwanira), mpweya wotsalira umakhala wocheperako, kotero sensa ipanga magetsi ochulukirapo (pafupifupi 0,9V).

Kusintha kwa chiŵerengero cha mpweya ndi mafuta

Kutsogolo kachipangizo mpweya ndi udindo kukhala akadakwanitsira chiŵerengero cha mpweya / mafuta kwa injini, pafupifupi 14,7: 1 kapena 14,7 mbali mpweya ndi 1 gawo mafuta.

Chigawo chowongolera chimayang'anira kaphatikizidwe ka kusakaniza kwamafuta a mpweya kutengera deta kuchokera ku sensor ya oksijeni yakutsogolo. Pamene kafukufuku wa lambda akutsogolo azindikira kuchuluka kwa okosijeni, ECU imaganiza kuti injini ikuyenda mowonda (mafuta osakwanira) motero amawonjezera mafuta.

Pamene mlingo wa okosijeni mu utsi ndi otsika, ECU akuganiza kuti injini ikuyenda wolemera (mafuta ochuluka) ndi kuchepetsa mafuta.

Njirayi ndi yopitilira. Kompyuta ya injini nthawi zonse imasintha pakati pa zosakaniza zowonda komanso zolemera kuti zikhalebe ndi mpweya wabwino / mafuta. Njirayi imatchedwa ntchito yotseka.

Ngati muyang'ana kutsogolo kwa mpweya wa oxygen sensor voltage, idzachokera ku 0,2 volts (wotsamira) mpaka 0,9 volts (wolemera).

Galimotoyo ikayamba kuzizira, sensa yakutsogolo ya okosijeni siyimatenthetsa bwino ndipo ECU siigwiritsa ntchito chizindikiro cha DC1 kuti iziwongolera kutumiza mafuta. Njira imeneyi imatchedwa open loop. Pokhapokha sensa ikatenthedwa m'pamene makina ojambulira mafuta amapita kutsekeka.

M'magalimoto amakono, m'malo mwa sensa wamba ya okosijeni, sensor ya air-fuel ratio imayikidwa. Sensa ya mpweya / mafuta imagwira ntchito mosiyana, koma ili ndi cholinga chomwecho: kudziwa ngati mpweya / mafuta osakaniza omwe amalowa mu injini ndi olemera kapena owonda.

Sensor ya air-fuel ratio ndiyolondola kwambiri ndipo imatha kuyeza mitundu yambiri.

Kumbuyo kachipangizo mpweya

Sensa yakumbuyo kapena yakumunsi ya okosijeni imayikidwa mu utsi pambuyo pa chosinthira chothandizira. Imayesa kuchuluka kwa okosijeni mumipweya yotulutsa mpweya yomwe imasiya chothandizira. Chizindikiro chochokera ku kafukufuku wam'mbuyo wa lambda chimagwiritsidwa ntchito kuyang'anira mphamvu ya chosinthira.

Wowongolera nthawi zonse amafanizira ma sign kuchokera kutsogolo ndi kumbuyo kwa O2 masensa. Kutengera ndi zizindikiro ziwirizi, ECU ikudziwa bwino momwe chosinthira chothandizira chikugwira ntchito. Ngati chosinthira chothandizira chalephera, ECU imayatsa nyali ya "Check Engine" kuti ikudziwitse.

Sensa yakumbuyo ya okosijeni imatha kuyang'aniridwa ndi scanner yowunikira, adapter ya ELM327 yokhala ndi pulogalamu ya Torque, kapena oscilloscope.

Chizindikiritso cha Sensor Oxygen

Kufufuza kwa lambda kutsogolo kwa chosinthira chothandizira kumatchedwa "m'mwamba" sensor kapena sensor 1.

Sensor yakumbuyo yomwe idayikidwa pambuyo pa chosinthira chothandizira imatchedwa sensor pansi kapena sensor 2.

Injini yamtundu wa 4-cylinder imakhala ndi chipika chimodzi (banki 1/banki 1). Chifukwa chake, pa injini ya 4-cylinder, mawu akuti "banki 1 sensor 1" amangotanthauza sensor yakutsogolo ya okosijeni. "Bank 1 Sensor 2" - sensor yakumbuyo ya okosijeni.

Werengani zambiri: Kodi Bank 1, Bank 2, Sensor 1, Sensor 2 ndi chiyani?

Injini ya V6 kapena V8 ili ndi midadada iwiri (kapena magawo awiri a "V"). Nthawi zambiri, chipika cha silinda chokhala ndi silinda #1 chimatchedwa "banki 1".

Opanga magalimoto osiyanasiyana amatanthauzira Bank 1 ndi Bank 2 mosiyana. Kuti mudziwe komwe banki 1 ndi bank 2 zili pagalimoto yanu, mutha kuyang'ana chaka, kupanga, mtundu, ndi kukula kwa injini mubuku lanu lokonzekera kapena Google.

Kusintha sensor ya oxygen

Mavuto a sensa ya okosijeni ndiofala. Kufufuza kolakwika kwa lambda kumatha kubweretsa kuchuluka kwamafuta, kutulutsa mpweya wochulukirapo komanso zovuta zosiyanasiyana zoyendetsa (kutsika kwa rpm, kusathamanga bwino, kuyandama kwa rev, ndi zina). Ngati sensa ya okosijeni ili ndi vuto, iyenera kusinthidwa.

Pamagalimoto ambiri, kusintha DC ndi njira yosavuta. Ngati mukufuna kusintha kachipangizo ka oxygen nokha, ndi luso lina ndi bukhu lokonzekera, sizili zovuta, koma mungafunike cholumikizira chapadera cha sensa (chithunzi).

Nthawi zina zimakhala zovuta kuchotsa kafukufuku wakale wa lambda, chifukwa nthawi zambiri amachita dzimbiri.

Chinthu chinanso choyenera kukumbukira ndi chakuti magalimoto ena amadziwika kuti ali ndi vuto ndi masensa am'malo a oxygen.

Mwachitsanzo, pali malipoti a sensa ya okosijeni yamtundu wa aftermarket yomwe imayambitsa mavuto pa injini za Chrysler. Ngati simukutsimikiza, ndibwino kugwiritsa ntchito sensor yoyambira nthawi zonse.