Kaya ndinu katswiri wopanga injini, makanika kapena wopanga, kapena wokonda magalimoto omwe amakonda mainjini, magalimoto othamanga ndi magalimoto othamanga, Engine Builder ali ndi china chake kwa inu. Magazini athu osindikizidwa amapereka tsatanetsatane waukadaulo pa chilichonse chomwe muyenera kudziwa chokhudza makampani opanga injini ndi misika yake yosiyanasiyana, pomwe njira zathu zamakalata zimakusungani kuti mudziwe nkhani ndi zinthu zaposachedwa, zambiri zaukadaulo ndi magwiridwe antchito amakampani. Komabe, mutha kupeza zonsezi pokhapokha polembetsa. Lembetsani tsopano kuti mulandire magazini yosindikizidwa ndi/kapena ya digito ya Engine Builders Magazine, komanso Newsletter yathu ya Engine Builders Newsletter ya sabata iliyonse, Weekly Engine Newsletter kapena Weekly Diesel Newsletter mwachindunji mu inbox yanu. Mudzadzazidwa ndi mphamvu zamphamvu posachedwa!
Kaya ndinu katswiri wopanga injini, makanika kapena wopanga, kapena wokonda magalimoto omwe amakonda mainjini, magalimoto othamanga ndi magalimoto othamanga, Engine Builder ali ndi china chake kwa inu. Magazini athu osindikizidwa amapereka tsatanetsatane waukadaulo pa chilichonse chomwe muyenera kudziwa chokhudza makampani opanga injini ndi misika yake yosiyanasiyana, pomwe njira zathu zamakalata zimakusungani kuti mudziwe nkhani ndi zinthu zaposachedwa, zambiri zaukadaulo ndi magwiridwe antchito amakampani. Komabe, mutha kupeza zonsezi pokhapokha polembetsa. Lembetsani tsopano kuti mulandire magazini yosindikizidwa ndi/kapena yamagetsi ya Engine Builders Magazine pamwezi, komanso Weekly Engine Builders Newsletter yathu, Weekly Engine Newsletter kapena Weekly Diesel Newsletter, molunjika ku inbox yanu. Mudzadzazidwa ndi mphamvu zamphamvu posachedwa!
Injini ya Harley-Davidson Revolution Max 1250 imapangidwa ku fakitale ya Pilgrim Road ku Wisconsin. V-Twin ili ndi mphamvu ya 1250 cc. cm, bore ndi stroke mainchesi 4.13 (105 mm) x mainchesi 2.83 (72 mm) ndipo imatha kukhala ndi mphamvu ya akavalo 150 ndi torque ya 94 lb-ft. Torque yayikulu ndi 9500 ndipo chiŵerengero cha compression ndi 13:1.
M'mbiri yonse ya galimoto yake, Harley-Davidson yakhala ikugwiritsa ntchito njira zamakono, polemekeza cholowa cha mtundu wake, kuti ipereke magwiridwe antchito enieni kwa okwera magalimoto enieni. Chimodzi mwa zinthu zamakono zomwe Harley yapanga ndi injini ya Revolution Max 1250, injini yatsopano ya V-twin yoziziritsidwa ndi madzi yomwe imagwiritsidwa ntchito mu Pan America 1250 ndi Pan America 1250 Special models.
Injini ya Revolution Max 1250, yopangidwa kuti ikhale yokongola komanso yosavuta kuyiyendetsa, ili ndi mphamvu zambiri zowonjezera mphamvu. Injini ya V-Twin yakonzedwa kuti ipereke mphamvu zoyenera kwa mitundu ya Pan America 1250, makamaka pakupereka mphamvu zochepa komanso mphamvu zochepa zoyendetsera galimoto popanda kukwera pamsewu.
Kuyang'ana kwambiri pa magwiridwe antchito ndi kuchepetsa kulemera kumayendetsa kapangidwe ka magalimoto ndi injini, kusankha zinthu ndi kukonza bwino kapangidwe ka zigawo. Kuti muchepetse kulemera konse kwa njinga yamoto, injiniyo imaphatikizidwa mu chitsanzo cha Pan Am ngati gawo lalikulu la chassis. Kugwiritsa ntchito zipangizo zopepuka kumathandiza kupeza chiŵerengero choyenera cha mphamvu ndi kulemera.
Injini ya Revolution Max 1250 imapangidwa ku Harley-Davidson Pilgrim Road Powertrain Operations ku Wisconsin. V-Twin ili ndi mphamvu ya 1250 cc. cm, bore ndi stroke mainchesi 4.13 (105 mm) x mainchesi 2.83 (72 mm) ndipo imatha kukhala ndi mphamvu ya akavalo 150 ndi torque ya 94 lb-ft. Torque yayikulu ndi 9500 ndipo chiŵerengero cha compression ndi 13:1.
Kapangidwe ka injini ya V-Twin kamapereka mawonekedwe opapatiza a transmission, kamapangitsa kuti munthu azitha kuyendetsa bwino komanso kuyendetsa bwino, ndipo kamapatsa woyendetsa galimotoyo malo okwanira a miyendo. Ngodya ya V-degree 60 ya masilinda imapangitsa kuti injini ikhale yaying'ono komanso imapereka malo okwanira kuti ma throttle bodies awiri adutse pakati pa masilinda kuti mpweya uziyenda bwino komanso kuti ntchito iyende bwino.
Kuchepetsa kulemera kwa giya kumathandiza kuchepetsa kulemera kwa njinga yamoto, zomwe zimapangitsa kuti ikhale yogwira ntchito bwino, yothamanga, yogwira ntchito komanso yoyimitsa mabuleki. Kugwiritsa ntchito Finite Element Analysis (FEA) ndi njira zamakono zopangira mapangidwe apamwamba mu gawo lopangira injini kumachepetsa kulemera kwa zinthu zomwe zili mu zida zopangidwa ndi zomangira. Mwachitsanzo, pamene kapangidwe kake kankapitirira, zinthuzo zinachotsedwa pa giya loyambira ndi giya loyendetsa camshaft kuti zichepetse kulemera kwa zinthuzi. Silinda ya aluminiyamu yokhala ndi nickel-silicon carbide surface electroplating ndi kapangidwe kopepuka, komanso chivundikiro chopepuka cha magnesium alloy rocker, chivundikiro cha camshaft ndi chivundikiro chachikulu.
Malinga ndi Mainjiniya Wamkulu wa Harley-Davidson, Alex Bozmosky, injini ya Revolution Max 1250 ndi gawo la kapangidwe ka chassis ya njinga yamoto. Chifukwa chake, injini ili ndi ntchito ziwiri - kupereka mphamvu komanso ngati gawo la kapangidwe ka chassis. Kuchotsa chimango chachikhalidwe kumachepetsa kwambiri kulemera kwa njinga yamoto ndipo kumapereka chassis yolimba kwambiri. Ziwalo zakutsogolo, ziwalo zapakati ndi chimango chakumbuyo zimalumikizidwa mwachindunji ku giya. Okwera amakwaniritsa magwiridwe antchito abwino kwambiri kudzera mu kuchepetsa kulemera kwakukulu, chassis yolimba komanso kuyika pakati.
Mu injini ya V-Twin, kutentha ndi mdani wa kulimba komanso chitonthozo cha woyendetsa, kotero injini yoziziritsidwa ndi madzi imasunga kutentha kwa injini ndi mafuta kokhazikika komanso kolamulidwa kuti igwire bwino ntchito. Chifukwa chakuti zigawo zachitsulo zimakula ndikuchepa, kulekerera kwa zigawo zolimba kumatha kuchitika powongolera kutentha kwa injini, zomwe zimapangitsa kuti magwiridwe antchito a injini akhale abwino.
Kuphatikiza apo, phokoso labwino kwambiri la injini komanso phokoso losangalatsa la utsi zimatha kukhala zazikulu chifukwa phokoso lochokera mkati mwa injini limachepetsedwa ndi kuzizira kwamadzimadzi. Mafuta a injini amaziziranso ndi madzi kuti atsimikizire kuti mafuta a injini amagwira ntchito bwino komanso kulimba m'malo ovuta.
Pampu yoziziritsira imapangidwa ndi ma bearing ndi zisindikizo zogwira ntchito bwino kuti zikhale ndi moyo wautali, ndipo njira zoziziritsira zimaphatikizidwa mu kuponyedwa kovuta kwa chivundikiro cha stator kuti zichepetse kulemera ndi m'lifupi mwa kutumiza.
Mkati mwake, Revolution Max 1250 ili ndi ma crankpin awiri omwe amasinthidwa ndi madigiri 30. Harley-Davidson idagwiritsa ntchito luso lake lalikulu la kuthamanga m'malo osiyanasiyana kuti imvetse kayendedwe ka mphamvu ya Revolution Max 1250. Kutsatana kwa madigiri kungathandize kuti galimoto igwire bwino ntchito pazochitika zina zoyendetsa galimoto popanda msewu.
Ma pistoni a aluminiyamu opangidwa ndi crank ndi olumikizirana amalumikizidwa ku crank ndi connecting rods omwe ali ndi compression ratio ya 13:1, yomwe imawonjezera torque ya injini pa liwiro lililonse. Ma sensor ozindikira kugogoda apamwamba amapangitsa kuti compression ratio iyi ikhale yotheka. Injiniyo imafunika mafuta a octane 91 kuti ikhale ndi mphamvu zambiri, koma imagwira ntchito ndi mafuta ochepa a octane ndipo imaletsa kuphulika chifukwa cha ukadaulo wa sensor kugogoda.
Pansi pa pistoni pali chopinga kotero palibe chida chokakamiza mphete chomwe chikufunika kuti chiyikidwe. Siketi ya pistoni ili ndi chophimba chocheperako cha kukangana ndipo mphete za pistoni zochepa za kukangana zimachepetsa kukangana kuti zigwire bwino ntchito. Zingwe za mphete zapamwamba zimapangidwa kuti zikhale zolimba, ndipo ma jet oziziritsira mafuta amaloza pansi pa pistoni kuti athandize kuchotsa kutentha kwa kuyaka.
Kuphatikiza apo, injini ya V-Twin imagwiritsa ntchito mitu ya masilinda anayi (injini ziwiri zolowera ndi ziwiri zotulutsa mpweya) kuti ipereke malo akuluakulu a valavu. Izi zimatsimikizira kuti mphamvu yamagetsi yapansi panthaka ndi kusintha kosavuta kupita ku mphamvu yapamwamba pamene mpweya wodutsa m'chipinda choyaka umakonzedwa kuti ukwaniritse magwiridwe antchito ofunikira komanso zofunikira pakusuntha.
Valavu yotulutsa utsi yodzazidwa ndi sodium kuti kutentha kusamayende bwino. Njira zopachikira mafuta pamutu zimapezeka kudzera muukadaulo wapamwamba wopangira zinthu, ndipo kulemera kwake kumachepa chifukwa cha makulidwe ochepa a khoma la mutu.
Mutu wa silinda umapangidwa kuchokera ku aluminiyamu yamphamvu kwambiri ya 354. Chifukwa mituyo imagwira ntchito ngati malo olumikizira chassis, idapangidwa kuti ikhale yosinthasintha pamalo olumikizira koma yolimba pamwamba pa chipinda choyaka moto. Izi zimachitika pang'ono kudzera mu chithandizo cha kutentha chomwe chimafunidwa.
Mutu wa silinda ulinso ndi ma camshaft odziyimira pawokha a intake ndi exhaust pa silinda iliyonse. Kapangidwe ka DOHC kamalimbikitsa magwiridwe antchito apamwamba a RPM mwa kuchepetsa kufooka kwa valavu, zomwe zimapangitsa kuti pakhale mphamvu yayikulu. Kapangidwe ka DOHC kamaperekanso nthawi yodziyimira pawokha ya valve variable (VVT) pa ma cams odziyimira pawokha ndi exhaust, okonzedwa bwino kuti ma silinda akutsogolo ndi akumbuyo akhale ndi mphamvu yayikulu.
Sankhani mbiri inayake ya kamera kuti mupeze magwiridwe antchito omwe mukufuna kwambiri. Chojambulira cha camshaft cha mbali ya drive ndi gawo la sprocket ya drive, yopangidwa kuti ilole kuti camshaft ichotsedwe kuti igwiritsidwe ntchito kapena kusinthidwa kwa magwiridwe antchito mtsogolo popanda kuchotsa camshaft drive.
Pofuna kutseka sitima ya valve pa Revolution Max 1250, Harley anagwiritsa ntchito chowongolera pin valve chokhala ndi zowongolera hydraulic lash. Kapangidwe kameneka kamaonetsetsa kuti valve ndi valve actuator (pin) zikhalebe zogwirizana nthawi zonse kutentha kwa injini kumasintha. Zowongolera hydraulic lash zimapangitsa kuti sitima ya valve ikhale yopanda kukonza, zomwe zimapulumutsa nthawi ndi ndalama za eni ake. Kapangidwe kameneka kamasunga kupanikizika kosalekeza pa tsinde la valve, zomwe zimapangitsa kuti camshaft ikhale yolimba kwambiri kuti igwire bwino ntchito.
Mpweya womwe umayenda mu injini umathandizidwa ndi ma throttle awiri omwe amayikidwa pakati pa masilinda ndikuwayika kuti apange kugwedezeka kochepa komanso kukana mpweya. Kutumiza mafuta kumatha kukonzedwa payekhapayekha pa silinda iliyonse, zomwe zimapangitsa kuti mpweya ukhale wosavuta komanso wosavuta kugwiritsa ntchito. Malo apakati a throttle amalola bokosi la mpweya la malita 11 kukhala pamwamba pa injini. Kuchuluka kwa chipinda cha mpweya kumakonzedwa kuti injini igwire bwino ntchito.
Kapangidwe ka bokosi la mpweya kamalola kuti pakhale liwiro lokhazikika pa thupi lililonse la throttle, pogwiritsa ntchito inertia kuti mpweya wambiri ulowe m'chipinda choyaka moto, zomwe zimapangitsa kuti mphamvu ituluke. Bokosi la mpweya limapangidwa ndi nayiloni yodzazidwa ndi galasi yokhala ndi zipsepse zamkati zomwe zimamangidwa mkati kuti zithandize kuchepetsa phokoso la mpweya ndikuchepetsa phokoso la mpweya. Madoko olowera kutsogolo amaletsa phokoso la mpweya kuchoka kwa dalaivala. Kuchotsa phokoso la mpweya kumalola kuti phokoso la mpweya wabwino kwambiri lizilamulira.
Kugwira bwino ntchito kwa injini kumatsimikiziridwa ndi makina odalirika oyeretsera mafuta okhala ndi chosungira mafuta chomangidwa mu crankcase casting. Mapampu otulutsa mafuta atatu amachotsa mafuta ochulukirapo kuchokera m'zipinda zitatu za injini (crankcase, stator chamber ndi clutch chamber). Oyendetsa galimoto amapeza ntchito yabwino kwambiri chifukwa mphamvu ya parasitic imachepa chifukwa zigawo zamkati mwa injini siziyenera kuzungulira mafuta ochulukirapo.
Galimoto yapatsogolo imaletsa clutch kuti isayambitse mafuta a injini, zomwe zingachepetse kupezeka kwa mafuta. Mwa kuyika mafuta pakati pa crankshaft kupita ku main and connecting rod bearings, kapangidwe kameneka kamapereka mphamvu yochepa ya mafuta (60-70 psi), zomwe zimachepetsa kutayika kwa mphamvu ya parasitic pa rpm yapamwamba.
Chitonthozo cha Pan America 1250 pa ulendo chimatsimikiziridwa ndi balancer yamkati yomwe imachotsa kugwedezeka kwakukulu kwa injini, kukonza chitonthozo cha wokwera ndikuwonjezera kulimba kwa galimotoyo. Balancer yayikulu, yomwe ili mu crankcase, imayang'anira kugwedezeka kwakukulu komwe kumachitika ndi crankpin, piston ndi ndodo yolumikizira, komanso "rolling clutch" kapena kusalingana kwa kumanzere ndi kumanja komwe kumachitika chifukwa cha silinda yosakhazikika bwino. Balancer yothandizira pamutu wa silinda yakutsogolo pakati pa camshafts imathandizira balancer yayikulu kuti ichepetse kugwedezeka.
Pomaliza, Revolution Max ndi drivetrain yogwirizana, zomwe zikutanthauza kuti injini ndi gearbox ya magiya asanu ndi limodzi zimakhala mu thupi limodzi. Clutch ili ndi ma disc asanu ndi atatu okangana omwe adapangidwa kuti azigwira ntchito nthawi zonse pa torque yayikulu nthawi yonse ya clutch. Masipiringi owonjezera mu drive yomaliza amayeretsa ma impulses a crankshaft torque asanafike pa gearbox, ndikuwonetsetsa kuti torque imafalikira nthawi zonse.
Ponseponse, Revolution Max 1250 V-Twin ndi chitsanzo chabwino cha chifukwa chake njinga zamoto za Harley-Davidson zikufunidwabe kwambiri.
Othandizira injini za sabata ino ndi PennGrade Motor Oil, Elring-Das Original ndi Scat Crankshafts. Ngati muli ndi injini yomwe mukufuna kuiwonetsa mu mndandanda uwu, chonde tumizani imelo kwa mkonzi wa Engine Builder Greg Jones [email protected]
Nthawi yotumizira: Novembala-15-2022