I-Lambda probe - iyini futhi yiziphi izimpawu zomonakalo wayo?

Kubo bonke ababheka i-lambda probe njengento entsha yemishini yemoto, sinezindaba ezidabukisayo - amakhophi amadala alezi zinsiza zemoto afakwe eminyakeni engaphezu kwengu-40 edlule. Kusukela ngaleso sikhathi, ukunakwa kwezindinganiso zobuthi begesi yokukhipha umoya kuye kwanda kakhulu, ngakho umklamo we-lambda probes kanye nenani labo ezimotweni zishintshile. Ekuqaleni kufanelekile ukuchaza ukuthi iyini i-lambda probe nokuthi isebenza kanjani.

Iyini i-lambda probe futhi isebenza kanjani?

Ngamagama alula, i-lambda probe iyisici esincane esikhumbuza i-spark plug. Intambo kagesi ixhunywe kuyo, edlulisela ulwazi mayelana namanani amanje kusilawuli sedrayivu. Ishintsha ngaphansi kwethonya lokubunjwa kwamagesi okukhipha igesi ohlelweni lokuqeda. Imvamisa ifakwa endaweni ephakathi kwe-exhaust eningi kanye nesiguquli se-catalytic.

Yenzelweni i-lambda probe? 

Njengoba igama lisho, kumayelana nokunquma isilinganiso somoya nenani likaphethiloli elijovwe. I-probe ye-lambda esebenza kahle ikuvumela ukuthi uthase umthamo kaphethiloli ngokunembe kakhulu ngokunciphisa noma ukwandisa isikhathi somjovo.

Yini enye ethinta uphenyo lwe-lambda?

Ukwakhiwa kwengxube ye-air-fuel kuthinta ukusebenza kwesiguquli se-catalytic. Kunqunywa yilokho okubizwa ngokuthi ukuguqulwa kwe-catalyst, i.e. kungenzeka ukuhlanzwa kwayo kwamagesi okukhipha amandla ngokwenza izinqubo ze-catalytic. Ezimotweni ezingazange zisebenzise i-lambda probe, ukusebenza kahle kwe-catalyst kufinyelele ku-60%. Manje lawa madivayisi ahlinzeka ngokusebenza kahle okungama-95% kokungathathi hlangothi kwezinhlanganisela eziyingozi ze-nitrogen noma i-carbon.

Ungahlola kanjani impilo ye-lambda probe?

Lokhu kubonakala ikakhulukazi enanini likaphethiloli elishisiwe. I-lambda probe esebenza kahle isebenza kububanzi obuthathu, ithumela isignali isebenzisa ama-voltages ahlukene.

Uma ukwakheka kwengxube ye-air-fuel kulungile, idivayisi ikhiqiza isignali ye-1, engaguquli ukusebenza kwesilawuli mayelana nomjovo wamafutha. Kodwa-ke, esimweni sokwanda kwephesenti le-oksijini kumagesi okukhipha umoya (4-5%), i-voltage ehlinzekwa isici ngaphambi kokuba i-catalyst iyancipha. Isilawuli "sifunda" lokhu njengesidingo sokwandisa inani likaphethiloli elijovwe ngokwandisa isikhathi sokujova uphethiloli.

Ngesikhathi sokuncipha okuphawulekayo kwephesenti le-oksijini emagesini aphumayo, i-lambda probe ikhulisa i-voltage, okuholela ekwehleni kwenani likaphethiloli elinikeziwe. Ukwakheka kwe-exhaust kubonisa ingxube ecebile equkethe uphethiloli omningi.

Izimpawu ze-lambda probe eyonakele - ungazibona kanjani?

Uphawu lwenzwa ye-oxygen elimele ukukhuphuka kokusetshenziswa kukaphethiloli, kungakhathaliseki indlela yokushayela. Ezimweni eziningi, lokhu kuphakeme ngokuphindwe kabili kunezimo ezivamile. Lolu phawu kunzima ukulubona ngaphandle kokubheka ikhompuyutha esebhodini. Amabanga amafushane okushayela nawo awafaki isandla kulokhu, ngoba awadli uphethiloli omningi.

Olunye uphawu lokulimala kwe-lambda probe ukusebenza kwenjini okungalingani. Ngesikhathi soshintsho oluzenzakalelayo kumanani esivinini, ungase usole ukuthi i-lambda probe izohlolwa ngokushesha ngangokunokwenzeka. Awukwazi ukwenza ngaphandle kokuvakasha esiteshini sokuxilonga.

Ezinjinini zikadizili, intuthu emnyama evela kushimula nayo izokwanda, ikakhulukazi uma ishesha kakhulu. Ezikhathini ezinjalo, umthamo kaphethiloli uphakeme kakhulu, ngakho-ke kungenzeka futhi kubonakale ifu elimnyama lentuthu ethusayo.

Uphawu lokugcina olubonakalayo lokungasebenzi kahle kwe-lambda probe ukubukeka kwesibani "sokuhlola injini" esibukweni. Nakuba lokhu ngokuvamile kusho amaphutha amaningi, uma uphenyo lwe-lambda lonakele, isithonjana esiphuzi esinegama lenjini siwuphawu.

I-Lambda probe - izimpawu ze-HBO

Izizukulwane zokufakwa kwegesi kohlobo lwe-II kanye no-III zisebenzisa ngokuqondile isignali ethunyelwe ama-lambda probes. Kodwa-ke, ngokufika kwesizukulwane sesi-XNUMX sezitshalo ezilandelanayo, isimo sesishintshile. Isilawuli segesi sisebenzisa ngokuqondile izinzwa ezibhekele ukusebenza kwezijovo zikaphethiloli, ngakho-ke asithathi ngokuqondile isignali ku-lambda probe. Kodwa-ke, njengoba wazi, ikhompuyutha yeyunithi isebenzisa lesi siginali ukuze ithole ingxube efanele yesibaseli somoya. 

Ngakho-ke yiziphi izimpawu zophenyo lwe-lambda elimele ezimotweni ezisebenza ngegesi? 

Okokuqala nje, ukusha kuyaqina, kodwa iphunga legesi liyabonakala. Isizathu ukuthumela i-voltage ephumayo ephansi njalo ngenani lokulimala kwenzwa ehamba kancane futhi ikhompuyutha ikhuphule uphethiloli onemitha. Lokhu akuthinti kakhulu ukwakheka kwenjini, kodwa kungaholela ekwandeni kokusetshenziswa kukaphethiloli kanye nokungcoliswa komoya.

Ukushintsha i-lambda probe eyonakele

Njengoba izimo zokusebenza ze-probe zidlulele kakhulu futhi zinzima, ngokuhamba kwesikhathi zingahluleka. Ngakho-ke, udinga ukwazi hhayi kuphela ukuthi ungayihlola kanjani i-lambda probe, kodwa nokuthi ungayishintsha kanjani nokuthi iyiphi imodeli ongayikhetha. Le elementi ingatholakala ngqo phambi kwesiguquli se-catalytic futhi ibe nepulaki etholakala emhubheni ophakathi nendawo noma ngemuva ngqo kwe-multifold intake. Ngemva kokuthola, into ebaluleke kakhulu ukuthenga ikhophi efanayo (uma eyonakele yayibhalwe uphawu futhi isezingeni eliphezulu). Izishintshi ezishibhile azinikezi imingcele oyifunayo futhi azihlali isikhathi eside.

I-lambda probe iyisici esibaluleke kakhulu esihlotshaniswa nokusebenza kwenjini. Ngakho-ke, lapho ushintsha i-lambda probe, khetha njalo imodeli enobukhulu obufanayo futhi iguqulelwe kumodeli ethile yenjini. Ungakhohlwa ukukhetha izingxenye ezinophawu nezisezingeni eliphezulu ukuze ungabi yinkimbinkimbi ukusebenza kwemoto ngenye indawo.