Kungakhathaliseki ukuthi ungumakhi wezinjini ochwepheshe, umakhenikha noma umenzi, noma umthandi wezimoto othanda izinjini, izimoto zomjaho nezimoto ezisheshayo, i-Engine Builder inokuthile okukulungele. Omagazini bethu abaphrintiwe banikeza imininingwane yobuchwepheshe kukho konke okudingeka ukwazi mayelana nemboni yezinjini kanye nezimakethe zayo ezahlukahlukene, kuyilapho izinketho zethu zezindaba zikugcina usesikhathini ngezindaba zakamuva nemikhiqizo, ulwazi lobuchwepheshe kanye nokusebenza kwemboni. Kodwa-ke, ungakuthola konke lokhu ngokubhalisela kuphela. Bhalisa manje ukuze uthole izinhlelo eziphrintiwe kanye/noma zedijithali ze-Engine Builders Magazine, kanye ne-Engine Builders Newsletter yethu yamasonto onke, i-Weekly Engine Newsletter noma i-Weekly Diesel Newsletter ngqo ebhokisini lakho lokungenayo. Uzombozwa ngamahhashi ngokushesha!
Kungakhathaliseki ukuthi ungumakhi wezinjini ochwepheshe, umakhenikha noma umenzi, noma umthandi wezimoto othanda izinjini, izimoto zomjaho nezimoto ezisheshayo, i-Engine Builder inokuthile okukulungele. Omagazini bethu abaphrintiwe banikeza imininingwane yobuchwepheshe kukho konke okudingeka ukwazi mayelana nemboni yezinjini kanye nezimakethe zayo ezahlukahlukene, kuyilapho izinketho zethu zezindaba zikugcina usesikhathini ngezindaba zakamuva nemikhiqizo, ulwazi lobuchwepheshe kanye nokusebenza kwemboni. Kodwa-ke, ungakuthola konke lokhu ngokubhalisela kuphela. Bhalisa manje ukuze uthole izinhlelo eziphrintiwe njalo ngenyanga kanye/noma ze-elekthronikhi ze-Engine Builders Magazine, kanye ne-Weekly Engine Builders Newsletter yethu, i-Weekly Engine Newsletter noma i-Weekly Diesel Newsletter, ngqo ebhokisini lakho lokungenayo. Uzombozwa ngamahhashi ngokushesha!
Injini yeHarley-Davidson Revolution Max 1250 ihlanganiswe esitshalweni senkampani iPilgrim Road eWisconsin. I-V-Twin inokuguquguquka okungu-1250 cc. cm, i-bore kanye ne-stroke okungu-4.13 inches (105 mm) x 2.83 inches (72 mm) futhi inamandla angu-150 horsepower kanye ne-torque engu-94 lb-ft. I-torque ephezulu ingu-9500 kanti isilinganiso sokucindezela singu-13:1.
Kuwo wonke umlando wayo, i-Harley-Davidson isebenzise intuthuko yezobuchwepheshe, ihlonipha ifa lomkhiqizo wayo, ukuze inikeze ukusebenza kwangempela kwabagibeli bangempela. Enye yezimpumelelo zakamuva zomklamo we-Harley osezingeni eliphezulu yinjini ye-Revolution Max 1250, injini entsha sha ye-V-twin epholile ngoketshezi esetshenziswa kumamodeli e-Pan America 1250 kanye ne-Pan America 1250 Special.
Yakhelwe ukushesha nokukhanga, injini yeRevolution Max 1250 ine-powerband ebanzi yokukhulisa amandla e-redline. Injini ye-V-Twin ilungiselelwe ngqo ukuhlinzeka ngezici zamandla ezifanele zamamodeli e-Pan America 1250, kugxilwe ekulethweni kwe-torque ephansi okubushelelezi kanye nokulawula i-throttle ephansi yokugibela ngaphandle komgwaqo.
Ukugxila ekusebenzeni nasekunciphiseni isisindo kuqhuba ukwakheka kwezimoto nezinjini, ukukhethwa kwezinto kanye nokwenza ngcono ukwakheka kwezingxenye. Ukuze kuncishiswe isisindo sesithuthuthu, injini ihlanganiswe nemodeli yePan Am njengengxenye eyinhloko yeshasi. Ukusetshenziswa kwezinto ezilula kusiza ukufeza isilinganiso esifanele samandla nesisindo.
Injini yeRevolution Max 1250 ihlanganiswe eHarley-Davidson Pilgrim Road Powertrain Operations eWisconsin. I-V-Twin inokuguquguquka okungu-1250 cc. cm, i-bore kanye ne-stroke engu-4.13 inches (105 mm) x 2.83 inches (72 mm) futhi inamandla angu-150 horsepower kanye ne-torque engu-94 lb-ft. I-torque ephezulu ingu-9500 kanti isilinganiso sokucindezela singu-13:1.
Umklamo wenjini ye-V-Twin unikeza iphrofayili encane yokudlulisela, ugxilisa isisindo ukuze kube ngcono ibhalansi nokuphathwa, futhi unikeza umgibeli indawo eyanele yemilenze. I-engeli engu-60-degree V yamasilinda igcina injini incane ngenkathi inikeza isikhala semizimba ye-throttle emibili ephansi phakathi kwamasilinda ukuze kwandiswe ukuhamba komoya futhi kuthuthukiswe ukusebenza.
Ukunciphisa isisindo segiya kusiza ukunciphisa isisindo sesithuthuthu, okuthuthukisa ukusebenza kahle, ukusheshisa, ukuphatha kanye nokubhuleka. Ukusetshenziswa kwe-Finite Element Analysis (FEA) kanye namasu okuthuthukisa umklamo athuthukisiwe esigabeni sokuklama injini kunciphisa isisindo sezinto ezisetshenziswayo ezingxenyeni ezibunjiwe nezibunjiwe. Isibonelo, njengoba umklamo uqhubeka, izinto zasuswa kugiya lokuqala kanye negiya lokushayela le-camshaft ukuze kuncishiswe isisindo salezi zingxenye. Isilinda se-aluminium esisodwa esine-nickel-silicon carbide surface electroplating siyinto yokuklama elula, kanye nesembozo se-magnesium alloy rocker esilula, isembozo se-camshaft kanye nesembozo esiyinhloko.
Ngokusho kuka-Alex Bozmosky, unjiniyela omkhulu we-Harley-Davidson, i-drivetrain ye-Revolution Max 1250 iyisici sesakhiwo se-chassis yesithuthuthu. Ngakho-ke, injini inemisebenzi emibili - ukunikeza amandla kanye nesici sesakhiwo se-chassis. Ukususwa kohlaka lwendabuko kunciphisa kakhulu isisindo sesithuthuthu futhi kuhlinzeka nge-chassis eqinile kakhulu. Amalungu ohlaka lwangaphambili, amalungu ohlaka oluphakathi kanye nohlaka lwangemuva aboshwe ngqo ku-gearbox. Abagibeli bathola ukusebenza okuhle kakhulu ngokonga isisindo okukhulu, i-chassis eqinile kanye nokuhlanganisa isisindo esikhulu.
Enjinini ye-V-Twin, ukushisa kuyisitha sokuqina kanye nenduduzo yomgibeli, ngakho-ke injini epholile ngoketshezi igcina izinga lokushisa lenjini namafutha elizinzile nelilawulwayo ukuze isebenze kahle njalo. Ngenxa yokuthi izingxenye zensimbi ziyanda futhi zincipha kancane, ukubekezelela izingxenye eziqinile kungatholakala ngokulawula izinga lokushisa lenjini, okuholela ekusebenzeni okuthuthukisiwe kokudlulisa.
Ngaphezu kwalokho, umsindo wenjini ophelele kanye nenothi lokukhipha umoya elijabulisayo kungabusa njengoba umsindo ovela emithonjeni yangaphakathi yenjini uncishiswa ukupholisa koketshezi. Uwoyela wenjini uphinde upholiswe ngoketshezi ukuqinisekisa ukusebenza nokuqina kukawoyela wenjini ezimweni ezinzima.
Iphampu yokupholisa yakhelwe kuma-bearings nama-seal asebenza kahle kakhulu ukuze ihlale isikhathi eside, futhi izindlela zokupholisa zihlanganiswe ekubunjweni okuyinkimbinkimbi kwesembozo se-stator ukuze kuncishiswe isisindo nobubanzi bokudlulisa.
Ngaphakathi, i-Revolution Max 1250 inama-crankpin amabili abekwe eceleni ngama-degree angu-30. I-Harley-Davidson isebenzise ulwazi lwayo olubanzi lokugijima emaphandleni ukuze iqonde isigqi se-Revolution Max 1250 se-power pulse. Ukulandelana kwama-degree kungathuthukisa ukubamba kwezinye izimo zokushayela ngaphandle komgwaqo.
Kufakwe i-crank kanye nezinduku zokuxhumanisa ama-piston e-aluminium akhiwe ngesilinganiso sokucindezela esingu-13:1, okwandisa i-torque yenjini ngazo zonke izivinini. Izinzwa zokubona ukungqongqoza ezithuthukisiwe zenza lesi silinganiso sokucindezela okuphezulu sibe nokwenzeka. Injini izodinga uphethiloli we-octane ongu-91 ukuze ithole amandla aphezulu, kodwa izosebenza kuphethiloli we-octane ophansi futhi izovimbela ukuqhuma ngenxa yobuchwepheshe bezinzwa zokungqongqoza.
Ingxenye engezansi yepiston ixutshwe nge-chamfere ngakho-ke akudingeki ithuluzi lokucindezela indandatho ukuze kufakwe. Isiketi sepiston sinombozo ophansi wokungqubuzana kanye namasongo episton aphansi okucindezelana anciphisa ukungqubuzana ukuze kuthuthukiswe ukusebenza. Ama-lining aphezulu endandatho afakwe i-anodized ukuze aqine, kanti ama-jet okupholisa uwoyela akhomba phansi kwepiston ukusiza ekuqedeni ukushisa kokusha.
Ngaphezu kwalokho, injini ye-V-Twin isebenzisa amakhanda esilinda amane (ama-input amabili kanye nama-exhaust amabili) ukuze inikeze indawo enkulu kakhulu ye-valve. Lokhu kuqinisekisa i-torque enamandla ephansi kanye nokushintshela okubushelelezi emandleni aphezulu njengoba ukuhamba komoya egumbini lokushisa kulungiswa ukuze kuhlangatshezwane nezidingo zokusebenza ezidingekayo kanye nokufuduka.
Ivalvu yokukhipha umoya egcwele i-sodium ukuze kususwe ukushisa okungcono. Izindlela zikawoyela ezilenga ekhanda zitholakala ngobuchwepheshe bokubumba obuyinkimbinkimbi, futhi isisindo siyancishiswa ngenxa yobukhulu bodonga lwekhanda.
Ikhanda lesilinda liphonswe nge-aluminium alloy enamandla aphezulu angu-354. Ngenxa yokuthi amakhanda asebenza njengezindawo zokunamathisela i-chassis, aklanyelwe ukuba aguquguquke kuleyo ndawo yokunamathisela kodwa aqine phezu kwegumbi lokushisa. Lokhu kufezwa ngokwengxenye ngokwelashwa kokushisa okuqondisiwe.
Ikhanda lesilinda linama-camshaft okungenisa kanye nokukhipha umoya azimele esilinda ngasinye. Umklamo we-DOHC ukhuthaza ukusebenza okuphezulu kwe-RPM ngokunciphisa i-inertia yesitimela se-valve, okuholela emandleni aphezulu aphezulu. Umklamo we-DOHC uphinde unikeze isikhathi se-valve esiguquguqukayo esizimele (i-VVT) kuma-cam okungenisa kanye nokukhipha umoya, okwenzelwe amasilinda angaphambili nangemuva ukuze kube ne-powerband ebanzi.
Khetha iphrofayili ethile yekhamera ukuze uthole ukusebenza okufiselekayo kakhulu. Ijenali yokuthwala i-camshaft eseceleni kwedrayivu iyingxenye ye-drive sprocket, eyenzelwe ukuvumela ukususwa kwe-camshaft ukuze kusetshenziswe noma kuthuthukiswe ukusebenza kwesikhathi esizayo ngaphandle kokususa idrayivu ye-camshaft.
Ukuze avale isitimela se-valve ku-Revolution Max 1250, uHarley wasebenzisa i-roller pin valve actuation enezilungisi ze-hydraulic lash. Lo mklamo uqinisekisa ukuthi i-valve kanye ne-valve actuator (i-pin) zihlala zixhumana njalo njengoba izinga lokushisa lenjini lishintsha. Izilungisi ze-hydraulic lash zenza isitimela se-valve singagcinwa isikhathi eside, zisindisa isikhathi nemali yabanikazi. Lo mklamo ugcina ingcindezi engaguquki esiqwini se-valve, okuholela kuphrofayili ye-camshaft enamandla ukuze kuthuthukiswe ukusebenza.
Ukugeleza komoya enjinini kusizwa yiziphuphu ezimbili ze-downdraft ezibekwe phakathi kwamasilinda futhi zibekwe ukuze kudalwe ukuxokozela okuncane kanye nokumelana nokuhamba komoya. Ukulethwa kukaphethiloli kungalungiswa ngakunye kwesilinda ngasinye, kuthuthukise ukonga kanye nebanga. Indawo ephakathi yomzimba we-throttle ivumela ibhokisi lomoya elingamalitha ayi-11 ukuthi lihlale kahle ngaphezu kwenjini. Umthamo wegumbi lomoya wenzelwe ukusebenza kahle kwenjini.
Ukuma kwebhokisi lomoya kuvumela i-speed stack elungisiwe emzimbeni ngamunye we-throttle, kusetshenziswa i-inertia ukuphoqa umoya omningi ungene ekamelweni lokushisa, okwandisa amandla aphumayo. Ibhokisi lomoya lenziwe nge-nylon egcwele ingilazi enamaphiko angaphakathi akhelwe ngaphakathi ukusiza ukunciphisa umsindo womsindo nokunciphisa umsindo wokungenisa. Ama-port okungenisa abheke phambili agwema umsindo wokungenisa kude nomshayeli. Ukususa umsindo wokungenisa kuvumela umsindo ophelele wokukhipha umoya ukuthi ulawule.
Ukusebenza kahle kwenjini kuqinisekiswa uhlelo lokugcoba i-dry sump oluthembekile olune-oil reservoir eyakhelwe ngaphakathi kwe-crankcase casting. Amaphampu okudonsa uwoyela amathathu akhipha uwoyela owengeziwe avela emakamelweni amathathu enjini (i-crankcase, i-stator chamber kanye ne-clutch chamber). Abagibeli bathola ukusebenza okuhle kakhulu ngoba ukulahlekelwa kwamandla e-parasitic kuncishisiwe ngoba izingxenye zangaphakathi zenjini akudingeki zijikeleze uwoyela owengeziwe.
I-windscreen ivimbela i-clutch ukuthi ingashaji uwoyela wenjini, okunganciphisa ukunikezwa kukawoyela. Ngokufaka uwoyela phakathi nendawo ye-crankshaft kuma-bearings amakhulu kanye nama-connecting rod, lo mklamo unikeza umfutho kawoyela ophansi (60-70 psi), okunciphisa ukulahleka kwamandla e-parasitic nge-rpm ephezulu.
Induduzo yokugibela yePan America 1250 iqinisekiswa yi-balancer yangaphakathi eqeda ukudlidliza okukhulu kwenjini, ithuthukise induduzo yomgibeli futhi yandise ukuqina kwemoto. I-balancer eyinhloko, etholakala ku-crankcase, ilawula ukudlidliza okuyinhloko okudalwe yi-crankpin, i-piston kanye nenduku yokuxhuma, kanye "ne-rolling clutch" noma ukungalingani kwesobunxele kuya kwesokudla okubangelwa yi-cylinder engalingani kahle. I-balancer eyisizayo ekhanda lesilinda elingaphambili phakathi kwama-camshafts igcwalisa i-balancer eyinhloko ukuze inciphise ukudlidliza.
Okokugcina, i-Revolution Max iyi-drivetrain ehlanganisiwe, okusho ukuthi injini kanye ne-gearbox yesivinini esiyisithupha kugcinwe emzimbeni ojwayelekile. I-clutch ifakwe ama-disc ayisishiyagalombili okujikijelana aklanyelwe ukunikeza ukuzibandakanya okuqhubekayo nge-torque ephezulu kuyo yonke impilo ye-clutch. Izipilingi ezikhokhelayo ku-drive yokugcina zibushelelezi ama-torque e-crankshaft ngaphambi kokuba afike ku-gearbox, okuqinisekisa ukudluliswa kwe-torque okuqhubekayo.
Sekukonke, i-Revolution Max 1250 V-Twin iyisibonelo esihle sokuthi kungani izithuthuthu ze-Harley-Davidson zisadingeka kangaka.
Abaxhasi bezinjini zaleli sonto yiPennGrade Motor Oil, i-Elring-Das Original kanye ne-Scat Crankshafts. Uma unenjini ongathanda ukuyigqamisa kulolu chungechunge, sicela uthumele i-imeyili kumhleli we-Engine Builder uGreg Jones [email protected]
Isikhathi sokuthunyelwe: Novemba-15-2022