Valavu ya EGR - ndi chiyani ndipo ingachotsedwe?

Valve ya EGR ndi imodzi mwa zida zomwe zimayang'anira kutulutsa mpweya wochepa, ndipo nthawi yomweyo chimodzi mwazomwe zimayambitsa mavuto ambiri. Kusweka kumachitika nthawi zambiri, ndipo injini ikakhala yatsopano, gawo lake limakhala lokwera mtengo kwambiri. Mtengo ndi PLN 1000 kapena kupitilira apo. Chifukwa chake, anthu ambiri amasankha kuchotsa kapena kuletsa valavu ya EGR. 

Valve ya EGR ndi gawo la dongosolo la EGR lomwe limayang'anira kutsegulira ndi kutseka kutuluka kwa mpweya wotulutsa mpweya kudzera mu chitoliro cholumikizira pakati pa utsi ndi makina olowera. Ntchito yake ndi yolunjika kuchepa kwa oxygen mumlengalengazomwe zimadyetsedwa mu masilindala, potero kuchepetsa kutentha ndi kuchepetsa kuyaka. Izi, nazonso, zimachepetsa kutulutsa kwa nitrogen oxides (NOx). M'magalimoto amakono, valavu ya EGR ndi gawo lofunikira la zida zonse za injini zomwe zimakhudza mwachindunji kuyaka. Popanda izo, makompyuta olamulira angachotsedwe chimodzi mwa zida zomwe zingatheke, mwachitsanzo, kutentha kotchulidwa mu silinda.

Valve ya EGR simachepetsa mphamvu pamene ikugwira ntchito.

Ambiri amavomereza kuti valavu EGR ndi udindo kuchepetsa injini mphamvu. Umboni wa izi - makamaka m'mapangidwe akale - ndiko kuyankha kwabwinoko pakuwonjezera kwa gasi mutatha kulumikiza kapena kuchotsa valavu ya EGR. Anthu ena, komabe, amasokoneza zinthu ziwiri apa - mphamvu yayikulu yokhala ndi zomverera.

Zabwino mok Injini imafika pachimake chake pamene chowongolera chowongolera chikanikizidwa pansi - Valve ya Throttle yatsegulidwa kwathunthu. Munthawi imeneyi, valve ya EGR imakhalabe yotsekedwa, i.e. sichimalola mpweya wotulutsa mpweya mu mpweya wolowa. Kotero palibe kukayikira kuti izi zimakhudza kuchepetsa mphamvu zambiri. Mkhalidwewu ndi wosiyana pakulemetsa pang'ono, pomwe mpweya wina wotulutsa mpweya umadutsa mu dongosolo la EGR ndikubwerera ku injini. Komabe, ndiye kuti sitingathe kuyankhula kwambiri za kuchepa kwa mphamvu zambiri, koma za malingaliro oipa, omwe amakhala ndi kuchepa kwakuyankhidwa kwa kuwonjezera kwa gasi. Kukhala ngati kuponda pa gasi. Kuti timvetsetse momwe zinthu zilili - pamene EGR valavu imachotsedwa ndi njira yomweyo yotsegula pang'onopang'ono, injiniyo imatha kufulumizitsa mosavuta.

Kambiranani za kuchepetsa mphamvu kwambiri tingathe kokha pamene valavu ya EGR yawonongeka. Chifukwa cha kuipitsidwa kwakukulu, valve imasiya kutseka nthawi ina. Izi zikutanthauza kuti mosasamala kanthu kuti valavu ya throttle ili yotseguka bwanji, mpweya wina wotulutsa mpweya umalowa m'dongosolo lakumwa. Ndiyeno, kwenikweni, injini sangapange mphamvu zonse.

Chifukwa chiyani EGR yatsekedwa?

Monga gawo lililonse lomwe limapereka mpweya, valavu ya EGR imadetsedwanso pakapita nthawi. Cholembacho chimayikidwa pamenepo, chomwe chimaumitsa chifukwa cha kutentha kwambiri, ndikupanga kutumphuka kosavuta kuchotsa. Komanso, mwachitsanzo, pamene kuyaka sikuyenda bwino kapena mafuta a injini akayaka, kuchulukana kwa ma depositi kumaipitsa valavu mofulumira kwambiri. Ndizosapeweka, momwemonso Valve yotulutsa mpweya wotulutsa mpweya ndi gawo lomwe limayenera kutsukidwa nthawi ndi nthawi. Komabe, izi zimangochitika pamene mavuto ayamba.

Ipangitseni khungu, chotsani, zimitsani

Kuwonjezera pa kukonzanso koonekeratu komanso kolondola kwa valve ya EGR, i.e. kuyeretsa kapena - ngati palibe chomwe chikugwira ntchito - m'malo mwake ndi chatsopano, ogwiritsa ntchito magalimoto ndi zimango amayeserera katatu njira zosaloledwa ndi zosavomerezeka zothetsera vutoli.

• Lumikizani valve ya EGR zimakhala ndi makina otseka ndimeyi yake ndipo motero kuletsa kwamuyaya ntchito ya dongosolo. Nthawi zambiri, chifukwa cha ntchito za masensa osiyanasiyana injini ECU zindikirani cholakwika, siginecha ndi chizindikiro Check Engine.
• Kuchotsa valavu ya EGR ndi m'malo mwake ndi zomwe zimatchedwa bypass, i.e. chinthu chomwe chili chofanana ndi kapangidwe kake, koma sichilola kuti mpweya wotulutsa mpweya ulowe m'dongosolo lakumwa.
• Kuzimitsa kwamagetsi kuchokera pakugwira ntchito kwa valve ya EGR. Izi zimatheka ndi ma valve oyendetsedwa ndi magetsi.

Nthawi zina imodzi mwa njira ziwiri zoyamba zimagwiritsidwa ntchito limodzi ndi lachitatu, chifukwa injini yoyang'anira injini nthawi zonse imazindikira zochitika zamakina pa valve ya EGR. Choncho, mu injini zambiri - mutatha kulumikiza kapena kuchotsa valve ya EGR - mumayenera "kunyenga" wolamulira. 

Ndi njira ziti mwa izi zomwe zimapereka zotsatira zabwino? Ngati tikambirana za zotsatira mu mawonekedwe a injini bwino ntchito ndi kusowa kwa mavuto ndi EGR, ndiye aliyense. Pokhapokha kuti zachitika molondola, i.e. kusintha kwa kayendetsedwe ka injini kumaganiziridwanso. Mosiyana ndi zomwe zimawoneka ngati njira yokhayo yolondola ya EGR kuchokera ku ntchito ya injini mumagetsi amagetsi, chifukwa kulowetsedwa kwa makina sikumakhudza kugwira ntchito kwa makompyuta a injini. Imagwira ntchito bwino m'magalimoto akale okha. 

Mwatsoka, kusokoneza EGR sikuloledwachifukwa zimabweretsa kuwonjezeka kwa utsi wotulutsa mpweya. Tikulankhula pano za chiphunzitso ndi malamulo okha, chifukwa izi sizidzakhala zotsatira zake nthawi zonse. Pulogalamu yoyang'anira injini yolembedwanso yomwe imaphatikizapo kuzimitsa valavu ya EGR ikhoza kubweretsa zotsatira zabwino, kuphatikizapo chilengedwe, kusiyana ndi kuisintha ndi yatsopano. 

Inde, ndi bwino kusintha valavu ya EGR ndi yatsopano popanda kusokoneza ntchito ya injini. Kukumbukira mavuto omwe mudakhala nawo nawo, pafupipafupi - ma kilomita masauzande aliwonse - muyenera kuyeretsa ma depositi akuluakulu olimba asanawonekerenso.