Nokuba ungumakhi weenjini ochwephesha, umkhandi okanye umenzi, okanye ungumthandi weemoto othanda iinjini, iimoto zomdyarho kunye neemoto ezikhawulezayo, i-Engine Builder inento ethile kuwe. Iimagazini zethu eziprintiweyo zibonelela ngeenkcukacha zobugcisa kuyo yonke into ekufuneka uyazi malunga nomzi-mveliso weenjini kunye neemarike zayo ezahlukeneyo, ngelixa ukhetho lwethu lweendaba lukugcina usesikhathini ngeendaba zamva nje kunye neemveliso, ulwazi lobuchwephesha kunye nokusebenza komzi-mveliso. Nangona kunjalo, ungakufumana konke oku ngokubhalisa kuphela. Bhalisa ngoku ukuze ufumane ushicilelo lwenyanga kunye/okanye lwedijithali lweMagazini ye-Engine Builders, kunye neNewsletter yethu yeveki nganye ye-Engine Builders, iWeekly Engine Newsletter okanye iWeekly Diesel Newsletter ngqo kwi-inbox yakho. Uza kugubungela amandla ehashe kungekudala!
Nokuba ungumakhi weenjini ochwephesha, umkhandi okanye umenzi, okanye ungumthandi weemoto othanda iinjini, iimoto zomdyarho kunye neemoto ezikhawulezayo, i-Engine Builder inento ethile kuwe. Iimagazini zethu eziprintiweyo zibonelela ngeenkcukacha zobugcisa kuyo yonke into ekufuneka uyazi malunga nomzi-mveliso weenjini kunye neemarike zayo ezahlukeneyo, ngelixa ukhetho lwethu lweendaba lukugcina usesikhathini ngeendaba zamva nje kunye neemveliso, ulwazi lobuchwephesha kunye nokusebenza komzi-mveliso. Nangona kunjalo, ungakufumana konke oku ngokubhalisa kuphela. Bhalisa ngoku ukuze ufumane ushicilelo lwenyanga kunye/okanye ushicilelo lwe-elektroniki lweMagazini ye-Engine Builders, kunye ne-Weekly Engine Builders Newsletter yethu, i-Weekly Engine Newsletter okanye i-Weekly Diesel Newsletter, ngqo kwi-inbox yakho. Uza kugubungela amandla ehashe kungekudala!
Injini yeHarley-Davidson Revolution Max 1250 idityaniswe kwisityalo senkampani iPilgrim Road eWisconsin. I-V-Twin inomthamo we-1250 cc. cm, i-bore kunye ne-stroke ezii-intshi eziyi-4.13 (105 mm) x 2.83 (72 mm) kwaye inamandla e-150 horsepower kunye ne-94 lb-ft ye-torque. I-torque ephezulu yi-9500 kwaye umlinganiselo woxinzelelo yi-13:1.
Kuyo yonke imbali yayo, iHarley-Davidson isebenzise uphuhliso lwetekhnoloji, ihlonipha ilifa lophawu lwayo, ukubonelela ngentsebenzo yokwenyani kubakhweli bokwenyani. Enye yeempumelelo zamva nje zoyilo lweHarley yinjini yeRevolution Max 1250, injini entsha ye-V-twin epholisiweyo ngamanzi esetyenziswa kwiimodeli zePan America 1250 kunye nePan America 1250 Special.
Yenzelwe ukuba ibe lula kwaye inomtsalane, injini yeRevolution Max 1250 inebhendi ebanzi yamandla okunyusa amandla. Injini ye-V-Twin ilungiswe ngokukodwa ukubonelela ngeempawu zamandla ezifanelekileyo kwiimodeli zePan America 1250, kugxininiswa ekuhanjisweni kwe-torque ethambileyo kunye nolawulo lwe-throttle oluphantsi lokukhwela ngaphandle kwendlela.
Ukugxila ekusebenzeni nasekunciphiseni ubunzima kuqhuba uyilo lwezithuthi kunye neenjini, ukukhethwa kwezinto kunye nokwenza ngcono uyilo lwezixhobo. Ukunciphisa ubunzima bebhayisekile iyonke, injini idityaniswe kwimodeli yePan Am njengecandelo eliphambili le-chassis. Ukusetyenziswa kwezinto ezikhaphukhaphu kunceda ukufezekisa umlinganiselo ofanelekileyo wamandla nobunzima.
Injini yeRevolution Max 1250 idityaniswe kwiHarley-Davidson Pilgrim Road Powertrain Operations eWisconsin. I-V-Twin inomthamo we-1250 cc. cm, i-bore kunye ne-stroke ezii-intshi eziyi-4.13 (105 mm) x 2.83 intshi (72 mm) kwaye inamandla e-150 horsepower kunye ne-94 lb-ft ye-torque. I-torque ephezulu yi-9500 kwaye umlinganiselo woxinzelelo yi-13:1.
Uyilo lwenjini ye-V-Twin lubonelela ngeprofayili encinci yokudlulisela, lugxininisa ubunzima ukuze kuphuculwe ulungelelwano kunye nokuphathwa, kwaye lubonelela umkhweli ngesithuba esaneleyo semilenze. I-engile ye-V engama-60 degrees yeesilinda igcina injini incinci ngelixa inika indawo yemizimba ye-throttle ephindwe kabini phakathi kweesilinda ukuze kuphuculwe ukuhamba komoya kunye nokuphucula ukusebenza.
Ukunciphisa ubunzima begiya kunceda ekunciphiseni ubunzima bebhayisekile, nto leyo ephucula ukusebenza kakuhle, ukukhawulezisa, ukuphatha kunye nokuqhobosha. Ukusetyenziswa kwe-Finite Element Analysis (FEA) kunye neendlela zokuphucula uyilo oluphambili kwinqanaba loyilo lwenjini kunciphisa ubunzima bezinto ezikwiindawo ezibunjiweyo nezibunjiweyo. Umzekelo, njengoko uyilo luqhubeka, izinto zasuswa kwigiya yokuqalisa kunye negiya yokuqhuba ye-camshaft ukunciphisa ubunzima bezi zinto. Isilinda se-aluminium esine-nickel-silicon carbide surface electroplating luphawu loyilo olukhaphukhaphu, kunye nesigqubuthelo se-magnesium alloy rocker esikhaphukhaphu, isigqubuthelo se-camshaft kunye nesigqubuthelo esiphambili.
Ngokutsho kweNjineli eyiNtloko yeHarley-Davidson uAlex Bozmosky, i-drivetrain yeRevolution Max 1250 yinxalenye yesakhiwo se-chassis yesithuthuthu. Ke ngoko, injini inemisebenzi emibini - ukubonelela ngamandla kunye nenxalenye yesakhiwo se-chassis. Ukususwa kwesakhelo sendabuko kunciphisa kakhulu ubunzima besithuthuthu kwaye kubonelela nge-chassis enamandla kakhulu. Amalungu esakhelo sangaphambili, amalungu esakhelo esiphakathi kunye nesakhelo sangasemva aboshwe ngqo kwi-transmission. Abakhweli bafumana ukusebenza okuphezulu ngokonga ubunzima obukhulu, i-chassis eqinileyo kunye nokubeka phakathi kobunzima.
Kwinjini ye-V-Twin, ubushushu lutshaba lokuqina kunye nentuthuzelo yomkhweli, ngoko ke injini epholisiweyo ngolwelo igcina ubushushu benjini obuzinzileyo nobulawulwayo kunye neoyile ukuze isebenze rhoqo. Ngenxa yokuba izixhobo zesinyithi zanda kwaye zincipha kancinci, ukunyamezelana kwezixhobo eziqinileyo kunokufezekiswa ngokulawula ubushushu benjini, okubangela ukuba ukusebenza kothumelo kuphuculwe.
Ukongeza, isandi esigqibeleleyo senjini kunye nesandi esimnandi sokukhupha umoya zinokuba namandla njengoko ingxolo evela kwimithombo yangaphakathi yenjini incitshiswa kukupholisa ulwelo. Ioyile yenjini ikwapholiswa ulwelo ukuqinisekisa ukusebenza nokuqina kweoyile yenjini kwiimeko ezinzima.
Ipompo yokupholisa yakhelwe kwiibheringi kunye nezitywini ezisebenza kakuhle ukuze ihlale ixesha elide, kwaye iindlela zokupholisa zihlanganiswe kwi-complex casting yesigqubuthelo se-stator ukunciphisa ubunzima kunye nobubanzi bothumelo.
Ngaphakathi, iRevolution Max 1250 inee-crankpins ezimbini ezilinganiswe ngama-30 degrees. IHarley-Davidson isebenzise amava ayo amakhulu okubaleka e-cross-country ukuqonda isigqi se-Revolution Max 1250's power pulse. Ukulandelelana kwezidanga kunokuphucula ukubamba kwezinye iimeko zokuqhuba ngaphandle kwendlela.
Kwi-crank kunye neentambo zokudibanisa kukho ii-piston ze-aluminium ezenziwe ngobuchule ezinomlinganiselo wokucinezelwa we-13:1, ezonyusa i-torque yenjini ngazo zonke isantya. Ii-sensors zokufumanisa ukungqongqoza eziphambili zenza ukuba olu mlinganiselo wokuxinana oluphezulu lube nokwenzeka. Injini iya kufuna i-91 octane fuel ukuze ibe namandla aphezulu, kodwa iya kusebenza kwi-octane fuel ephantsi kwaye iya kuthintela ukuqhuma ngenxa yetekhnoloji ye-knock sensor.
Umzantsi wepiston une-chamfered ngoko ke akukho sixhobo sokucinezela iringi esifunekayo ukuze kufakelwe. Isiketi sepiston sinophawu oluphantsi lokungqubana kwaye iiringi zepiston ezixineneyo eziphantsi zinciphisa ukungqubana ukuze kuphuculwe ukusebenza. Iilingi eziphezulu zeringi zenziwe i-anodized ukuze zihlale ixesha elide, kwaye iijethi zokupholisa ioyile zikhomba ezantsi kwepiston ukunceda ekususeni ubushushu bokutsha.
Ukongeza, injini ye-V-Twin isebenzisa iintloko zesilinda ezine-valve (ezimbini zokungenisa kunye nezimbini zokukhupha umoya) ukubonelela ngendawo enkulu yevalve. Oku kuqinisekisa ukuba i-torque enamandla ephantsi kunye notshintsho olugudileyo ukuya kumandla aphezulu njengoko ukuhamba komoya kwigumbi lokutsha kulungiselelwe ukuhlangabezana neemfuno zokusebenza ezifunekayo kunye nokufuduka.
Ivalvu yokukhupha umoya ezaliswe yisodiyam ukuze kususwe ubushushu ngcono. Iindlela zeoyile ezixhonyiweyo entlokweni zenzeka ngetekhnoloji yokusika ephucukileyo, kwaye ubunzima buyancitshiswa ngenxa yobukhulu bodonga lwentloko.
Intloko yesilinda yenziwe nge-aluminium alloy enamandla aphezulu angama-354. Ngenxa yokuba iintloko zisebenza njengeendawo zokuncamathisela i-chassis, zenzelwe ukuba ziguquguquke kuloo ndawo yokuncamathisela kodwa ziqine phezu kwegumbi lokutsha. Oku kufezekiswa ngokuyinxenye ngonyango lobushushu olujoliswe kulo.
Intloko yesilinda ikwanazo nee-camshafts ezizimeleyo zokungenisa kunye nezokukhupha umoya kwisilinda nganye. Uyilo lwe-DOHC lukhuthaza ukusebenza okuphezulu kwe-RPM ngokunciphisa i-inertia yesitimela se-valve, nto leyo ebangela amandla aphezulu encotsheni. Uyilo lwe-DOHC lukwabonelela ngexesha le-valve eguquguqukayo ezimeleyo (VVT) kwii-cams zokungenisa kunye nezokukhupha umoya, ezilungiselelwe ii-cylinders zangaphambili nangasemva ukuze zibe nebhendi yamandla ebanzi.
Khetha iprofayili ethile yekhamera ukuze ufumane ukusebenza okufunekayo. Ijenali ye-camshaft ebekwe ecaleni kwedrayivu iyinxalenye ye-drive sprocket, eyenzelwe ukuvumela ukususwa kwe-camshaft ukuze kusetyenziswe okanye kuphuculwe ukusebenza kwixesha elizayo ngaphandle kokususa i-camshaft drive.
Ukuvala i-valve train kwiRevolution Max 1250, uHarley wasebenzisa i-roller pin valve actuation ene-hydraulic lash adjusters. Olu yilo luqinisekisa ukuba i-valve kunye ne-valve actuator (pin) zihlala zinxibelelana rhoqo njengoko ubushushu benjini butshintsha. I-hydraulic lash adjusters yenza i-valve train ingabi nakugcinwa, nto leyo esindisa ixesha kunye nemali yabanini. Olu yilo lugcina uxinzelelo oluqhubekayo kwi-valve stem, nto leyo ebangela ukuba i-camshaft ibe namandla ngakumbi ukuze kuphuculwe ukusebenza.
Ukuhamba komoya enjinini kuncediswa zii-throttles ezimbini ze-downdraft ezibekwe phakathi kweesilinda kwaye zibekwe ukuze kudalwe ukuxinana okuncinci kunye nokumelana nokuhamba komoya. Ukuhanjiswa kwepetroli kunokulungiswa ngokukodwa kwisilinda nganye, okuphucula ukonga kunye nomgama. Indawo ephakathi yomzimba we-throttle ivumela ibhokisi yomoya yelitha ezili-11 ukuba ihlale ngokugqibeleleyo ngaphezulu kwenjini. Umthamo wegumbi lomoya ulungiselelwe ukusebenza kwenjini.
Imilo yebhokisi yomoya ivumela ukuba kubekho i-speed stack ehlengahlengisiweyo kumzimba ngamnye we-throttle, kusetyenziswa i-inertia ukunyanzela ubunzima bomoya obuninzi kwigumbi lokutsha, oko kwandisa amandla okukhupha. Ibhokisi yomoya yenziwe nge-nylon egcwele iglasi ene-fins zangaphakathi ezakhelwe ngaphakathi ukunceda ukunciphisa i-resonance kunye nokunciphisa ingxolo yokungenisa. Iindawo zokungenisa ezijonge phambili zithintela ingxolo yokungenisa kude nomqhubi. Ukususa ingxolo yokungenisa kuvumela isandi esifanelekileyo sokukhupha umoya ukuba silawule.
Ukusebenza kakuhle kwenjini kuqinisekiswa yinkqubo yokuthambisa i-dry sump ethembekileyo ene-oyile reservoir eyakhelwe kwi-crankcase casting. Iimpompo ze-oyile ezintathu zikhupha ioyile engaphezulu kwiigumbi ezintathu zenjini (i-crankcase, i-stator chamber kunye ne-clutch chamber). Abakhweli bafumana ukusebenza okungcono kuba ukulahleka kwamandla e-parasitic kuyancipha kuba izinto zangaphakathi zenjini akufuneki zijikeleze kwioyile engaphezulu.
I-windshield ithintela i-clutch ekutshajiseni ioyile yenjini, nto leyo enokunciphisa ukunikezelwa kweoyile. Ngokufaka ioyile embindini we-crankshaft ukuya kwiibheringi eziphambili kunye neebheringi zentonga ezidibanisayo, olu yilo lubonelela ngoxinzelelo lweoyile oluphantsi (60-70 psi), olunciphisa ukulahleka kwamandla e-parasitic kwi-rpm ephezulu.
Intuthuzelo yokuhamba yePan America 1250 iqinisekiswa yi-internal balancer esusa uninzi lokungcangcazela kwenjini, iphucula intuthuzelo yomkhweli kwaye yandisa ukuqina kwesithuthi. I-main balancer, ekwi-crankcase, ilawula ukungcangcazela okuphambili okudalwe yi-crankpin, i-piston kunye nentonga yokudibanisa, kunye ne-"rolling clutch" okanye ukungalingani kwasekhohlo-ekunene okubangelwa yi-cylinder engalungelelananga kakuhle. I-assistant balancer entloko yesilinda engaphambili phakathi kwe-camshafts incedisana ne-main balancer ukunciphisa ukungcangcazela ngakumbi.
Okokugqibela, iRevolution Max yidrivetrain edibeneyo, oko kuthetha ukuba injini kunye ne-gearbox yesantya esithandathu zigcinwe kwi-common body. I-clutch ixhotyiswe ngee-discs ezisibhozo ze-friction ezenzelwe ukubonelela ngokusebenza rhoqo kwi-torque ephezulu kulo lonke ubomi be-clutch. Iisprings ezihlawulelayo kwi-final drive zithambisa ii-crankshaft torque impulses ngaphambi kokuba zifike kwi-gearbox, ukuqinisekisa ukuhanjiswa kwe-torque rhoqo.
Lilonke, iRevolution Max 1250 V-Twin ngumzekelo omhle wokuba kutheni iibhayisekile zeHarley-Davidson zisafuneka kangaka.
Abaxhasi beenjini zale veki yiPennGrade Motor Oil, i-Elring-Das Original kunye neScat Crankshafts. Ukuba unenjini ongathanda ukuyigqamisa kolu ngcelele, nceda uthumele i-imeyile kumhleli we-Engine Builder uGreg Jones [email protected]
Ixesha lokuthumela: Novemba-15-2022