Kunja kwa mphete ya pisitoni nthawi zambiri kumakutidwa kuti mpheteyo iwoneke bwino, monga kusintha mawonekedwe amtundu wamtundu kapena abrasion. Zopaka zina, monga zokutira zoyikapo monga zokutira zakuthupi kapena zamankhwala, nthawi zambiri zimawongolera mawonekedwe a mphete.

Alu-coat ndi zokutira zomwe sizingasungunuke zochokera ku alumina, zomwe zidapangidwa kumapeto kwa zaka za m'ma 1990 kuti achepetse nthawi ya injini zatsopano za MAN B & W MC.

MAN Diesel yakhazikitsa zokutira za aluminiyamu kutengera momwe zimayendera bwino pamapangidwe ake othamanga komanso ovala pang'ono. Zochitika zambiri komanso kupambana kwa 100% kumapangitsa kuti alu-coat awonekere. Njira 1 yokutira yothamanga. Alu-coat amachepetsa nthawi yoyeserera ndikupanga nthawi yotetezeka komanso yodalirika yopuma. Masiku ano, mphete zokutidwa ndi aluminiyamu zimagwiritsidwa ntchito m'mainjini atsopano komanso m'mainjini akale okhala ndi ma honing ndi ma semi-honing bushings. Kupaka kwa aluminiyamu kumachepetsanso kugwiritsa ntchito mafuta a silinda panthawi yosweka.

Alu-coat ndi ❖ kuyanika kwa theka-sofewa ndi kukhuthala kwa pafupifupi 0.25 mm. Linali "lopakidwa" ndipo linkawoneka ngati lovuta, koma mwamsanga linapanga malo otsetsereka ozungulira.

Matrix ofewa pa zokutirayo amachititsa kuti zinthu zolimba zosasungunuka zitulukire pamwamba pa mpheteyo ndipo zimagwira ntchito pamtunda wa liner movutikira pang'ono. Matrix amathanso kugwiritsidwa ntchito ngati chitetezo choteteza kuteteza zovuta zoyamba za abrasion isanathe.

Ubwino wa retrofitting ndi angapo. Ikayikidwa m'zitsamba zomwe zimagwiritsidwa ntchito kale, zokutira za aluminiyumu sizimangochotsa nthawi yothamanga ya mphete ya pistoni. Kupaka uku kumaperekanso malire owonjezera otetezedwa pothana ndi zovuta zogwirira ntchito. Izi nthawi zambiri zimatenga maola 500 mpaka 2,000. Kuwonongeka pang'ono kwa mphete za pisitoni zokutidwa ndi aluminiyamu zimawapangitsa kukhala abwino m'malo mwa mphete za pisitoni zong'ambika pokhudzana ndi kukonzanso pisitoni. Zovala zokhala ndi mphete zovala nthawi zambiri zimasonyeza zizindikiro za utoto ndi / kapena zophulika zomwe zimakhala ndi mphuno ndi kupukutidwa pang'ono. Alu-coat imayambitsa kuvala kwazitsulo pamlingo wa microscopic, womwe nthawi zambiri umakhala wokwanira kumanganso gawo lofunika kwambiri lotsegulira likalowa, lomwe ndi lofunikira kwambiri pakupanga mphete yamafuta a piston.