Kungakhathaliseki ukuthi ungumakhi wenjini ochwepheshe, umakhenikha noma umkhiqizi, noma umthandi wezimoto othanda izinjini, izimoto zomjaho nezimoto ezisheshayo, i-Engine Builder inokuthile ngawe. Omagazini bethu abanyathelisayo banikeza imininingwane yobuchwepheshe kukho konke odinga ukukwazi mayelana nemboni yenjini nezimakethe zayo ezihlukahlukene, kuyilapho izinketho zethu zezincwadi zezindaba zikugcina unolwazi lwakamuva ngezindaba zakamuva nemikhiqizo, ulwazi lobuchwepheshe kanye nokusebenza komkhakha. Nokho, ungathola konke lokhu kuphela ngokubhalisela. Bhalisa manje ukuze uthole ukunyatheliswa kwanyanga zonke kanye/noma kwedijithali kwe-Engine Builders Magazine, kanye ne-Engine Builders Newsletter yethu yamasonto onke, i-Weekly Engine Newsletter noma i-Weekly Diesel Newsletter ngqo ebhokisini lakho lokungenayo. Uzokwembozwa amandla ehhashi ngokushesha!
Kungakhathaliseki ukuthi ungumakhi wenjini ochwepheshe, umakhenikha noma umkhiqizi, noma umthandi wezimoto othanda izinjini, izimoto zomjaho nezimoto ezisheshayo, i-Engine Builder inokuthile ngawe. Omagazini bethu abanyathelisayo banikeza imininingwane yobuchwepheshe kukho konke odinga ukukwazi mayelana nemboni yenjini nezimakethe zayo ezihlukahlukene, kuyilapho izinketho zethu zezincwadi zezindaba zikugcina unolwazi lwakamuva ngezindaba zakamuva nemikhiqizo, ulwazi lobuchwepheshe kanye nokusebenza komkhakha. Nokho, ungathola konke lokhu kuphela ngokubhalisela. Bhalisa manje ukuze uthole ukuphrintwa kwanyanga zonke kanye/noma ama-electronic edition of Engine Builders Magazine, kanye ne-Weekly Engine Builders Newsletter, Weekly Engine Newsletter noma Weekly Diesel Newsletter, ngqo ebhokisini lakho lokungenayo. Uzokwembozwa amandla ehhashi ngokushesha!
Injini ye-Harley-Davidson Revolution Max 1250 ihlanganiswe embonini yenkampani ye-powertrain i-Pilgrim Road e-Wisconsin. I-V-Twin ine-displacement engu-1250 cc. cm, ibhoboze futhi ishaye amaintshi angu-4.13 (105 mm) x 2.83 amayintshi (72 mm) futhi inamandla amahhashi angu-150 kanye ne-torque engu-94 lb-ft. I-torque enkulu ingu-9500 kanti isilinganiso sokucindezela singu-13:1.
Kuwo wonke umlando wayo, u-Harley-Davidson usebenzise intuthuko yezobuchwepheshe, ehlonipha ifa lomkhiqizo wayo, ukuze anikeze ukusebenza kwangempela kwabagibeli bangempela. Enye yezimpumelelo zakamuva zedizayini zika-Harley injini ye-Revolution Max 1250, injini ye-V-twin entsha epholile uketshezi esetshenziswa kumamodeli akhethekile we-Pan America 1250 kanye ne-Pan America 1250.
Iklanyelwe ukushesha nokukhanga, injini ye-Revolution Max 1250 inebhande lamandla elibanzi lokukhushulwa kwamandla okubomvu. Injini ye-V-Twin ishunwe ngokukhethekile ukuze inikeze izici ezinamandla zamamodeli e-Pan America 1250, okugcizelelwa ekulethweni kwetorque esezingeni eliphansi kanye nokulawulwa kwe-throttle okuphansi kokugibela ngaphandle komgwaqo.
Ukugxila ekusebenzeni nokwehliswa kwesisindo kushayela imoto nesakhiwo senjini, ukukhetha okubalulekile kanye nokwenza kahle okusebenzayo komklamo wengxenye. Ukunciphisa isisindo sesithuthuthu, injini ihlanganiswa nemodeli ye-Pan Am njengengxenye ye-chassis eyinhloko. Ukusetshenziswa kwezinto ezingasindi kusiza ukufeza isilinganiso esifanele samandla nesisindo.
Injini yeRevolution Max 1250 ihlanganiswe eHarley-Davidson Pilgrim Road Powertrain Operations eWisconsin. I-V-Twin ine-displacement engu-1250 cc. cm, ibhoboze futhi ishaye amaintshi angu-4.13 (105 mm) x 2.83 amayintshi (72 mm) futhi inamandla amahhashi angu-150 kanye ne-torque engu-94 lb-ft. I-torque enkulu ingu-9500 kanti isilinganiso sokucindezela singu-13:1.
Idizayini yenjini ye-V-Twin inikeza iphrofayili yokudlulisela emincane, igxilisa isisindo sokulinganisela okuthuthukisiwe nokubamba, futhi inikeza umgibeli indawo eyanele yomlenze. I-engeli engu-60-degree engu-V yamasilinda igcina injini ihlangene kuyilapho inikeza isikhala sokudonsela phansi imizimba emibili edonsayo phakathi kwamasilinda ukuze kwandiswe ukugeleza komoya futhi kuthuthukiswe ukusebenza.
Ukunciphisa isisindo sokudlulisa kusiza ukunciphisa isisindo sesithuthuthu, okuthuthukisa ukusebenza kahle, ukusheshisa, ukuphatha kanye nokubhuleka. Ukusetshenziswa kwe-Finite Element Analysis (FEA) nezindlela ezithuthukisiwe zokuthuthukisa idizayini esigabeni sokudizayina injini kunciphisa ubuningi bezinto ezibonakalayo ezingxenyeni ezibunjiwe nezibunjiwe. Isibonelo, njengoba umklamo uqhubeka, impahla yasuswa egiyeni lokuqala kanye negiya le-camshaft drive ukuze kwehliswe isisindo salezi zingxenye. Isilinda se-aluminium enocezu olulodwa ene-nickel-silicon carbide surface electroplating iyisici sokuklama esingasindi, kanye nekhava ye-rocker ye-magnesium alloy engasindi, ikhava ye-camshaft nekhava eyinhloko.
Ngokuka-Harley-Davidson Chief Engineer Alex Bozmosky, i-Revolution Max 1250′s drivetrain iyingxenye yesakhiwo se-chassis yesithuthuthu. Ngakho-ke, injini inemisebenzi emibili - ukunikeza amandla futhi njengento yesakhiwo se-chassis. Ukuqedwa kohlaka lwendabuko kunciphisa kakhulu isisindo sesithuthuthu futhi kunikeza i-chassis enamandla kakhulu. Amalungu ozimele ongaphambili, amalungu ozimele omaphakathi kanye nohlaka lwangemuva kubhawudi ngqo ekudluliseni. Abagibeli bafinyelela ukusebenza okungcono kakhulu ngokonga isisindo esibalulekile, i-chassis eqinile kanye nokubeka endaweni eyodwa ngobuningi.
Enjinini ye-V-Twin, ukushisa kuyisitha sokuqina nokunethezeka komgibeli, ngakho injini epholile uketshezi igcina injini ezinzile futhi elawulwayo nezinga lokushisa likawoyela ukuze lisebenze ngokungaguquki. Ngenxa yokuthi izingxenye zensimbi ziyakhula futhi zinciphe kancane, ukubekezelela izingxenye eziqinile kungafinyelelwa ngokulawula izinga lokushisa lenjini, okuholela ekusebenzeni okuthuthukisiwe kokudlulisela.
Ngaphezu kwalokho, umsindo ophelele wenjini kanye nenothi yokukhipha umoya ethokozisayo ingabusa njengoba umsindo ovela emithonjeni yangaphakathi yenjini uncishiswa ukupholisa uketshezi. Amafutha enjini nawo ayapholiswa uketshezi ukuqinisekisa ukusebenza nokuqina kwamafutha enjini ezimeni ezinzima.
Iphampu epholile yakhelwe kuma-bearings okusebenza okuphezulu kanye nezigxivizo zesikhathi eside, futhi amaphaseji okupholisa ahlanganiswe ekusakazeni okuyinkimbinkimbi kwekhava ye-stator ukunciphisa isisindo sokudlulisela nobubanzi.
Ngaphakathi, iRevolution Max 1250 inama-crankpins amabili asuswe ngo-30 degrees. U-Harley-Davidson usebenzise isipiliyoni sakhe esinabile somjaho wezwe ukuze aqonde isigqi se-Revolution Max 1250′s power pulse rhythm. ukulandelana kweziqu kungathuthukisa ukunyakazisa ezimweni ezithile zokushayela ngaphandle komgwaqo.
Okunamathiselwe ku-crank kanye nezinduku zokuxhuma amapiston e-aluminium enziwe ngomgunyathi ane-compression ratio engu-13:1, akhuphula i-torque yenjini ngaso sonke isivinini. Izinzwa ezitholwayo ezithuthukisiwe zenza lesi silinganiso sokucindezela okuphezulu senzeke. Injini izodinga uphethiloli we-octane ongu-91 ukuze ibe namandla amakhulu, kodwa izosebenzisa uphethiloli we-octane ephansi futhi izovimbela ukuqhuma ngenxa yobuchwepheshe benzwa yokushaya.
Iphansi le-piston li-chamfered ngakho-ke alikho ithuluzi lokucindezela indandatho elidingekayo ukuze lifakwe. Isiketi se-piston sine-coating ephansi ye-friction futhi amasongo e-piston aphansi anciphisa ukungqubuzana ukuze usebenze kangcono. Amaringi aphezulu enziwe i-anodized ukuze aqine, futhi amajethi okupholisa uwoyela akhomba phansi kwepiston ukusiza ukuqeda ukushisa kokusha.
Ngaphezu kwalokho, injini ye-V-Twin isebenzisa amakhanda ama-cylinder amane (amabili okungenisa kanye ne-exhaust amabili) ukuze anikeze indawo enkulu kakhulu ye-valve. Lokhu kuqinisekisa i-torque esezingeni eliphansi eqinile kanye noguquko olushelelayo oluya emandleni aphezulu njengoba ukugeleza komoya endaweni evuthayo kulungiselelwa ukuhlangabezana nezidingo zokusebenza ezidingekayo kanye nezidingo zokuthutha.
I-valve yokukhipha umoya egcwele i-sodium ukuze kukhishwe ukushisa okungcono. Amaphaseji kawoyela amisiwe ekhanda atholakala ngobuchwepheshe obuyinkimbinkimbi bokuphonsa, futhi isisindo siyancishiswa ngenxa yobukhulu obuncane bodonga lwekhanda.
Ikhanda le-cylinder lisenziwe kusukela ku-354 aluminium alloy enamandla aphezulu. Ngenxa yokuthi amakhanda asebenza njengamaphoyinti okunamathiselwe ku-chassis, aklanyelwe ukuguquguquka kuleyo ndawo yokunamathisela kodwa aqine phezu kwegumbi elivuthayo. Lokhu ngokwengxenye kufinyelelwa ngokwelashwa okuhlosiwe kokushisa.
Ikhanda lesilinda libuye libe nama-camshafts azimele kanye ne-exhaust ye-cylinder ngayinye. Idizayini ye-DOHC ikhuthaza ukusebenza okuphezulu kwe-RPM ngokunciphisa inertia yesitimela se-valve, okuholela emandleni aphezulu aphezulu. Idizayini ye-DOHC iphinde ihlinzekele isikhathi esizimele se-valve eguquguqukayo (VVT) kumakhamera wokudonsa nawokukhipha amandla, alungiselelwe amasilinda angaphambili nangemuva ukuze kube nebhendi yamandla ebanzi.
Khetha iphrofayela ethile yekhamera ukuze uthole ukusebenza okufuna kakhulu. Ijenali ephethe i-camshaft eseceleni yokushayela iyingxenye ye-drive sprocket, eklanyelwe ukuvumela ukususwa kwe-camshaft yesevisi noma ukuthuthukiswa kokusebenza okuzayo ngaphandle kokukhipha idrayivu ye-camshaft.
Ukuvala isitimela samavalvu ku-Revolution Max 1250, u-Harley wasebenzisa i-roller pin valve actuation ene-hydraulic lash adjusters. Lo mklamo uqinisekisa ukuthi i-valve ne-actuator ye-valve (iphini) kuhlala kuthintana njalo njengoba izinga lokushisa lenjini lishintsha. Izilungisi ze-hydraulic lash zenza isitimela se-valve singalungiswa, sisindisa isikhathi nemali yabanikazi. Lo mklamo ugcina ingcindezi engaguquki esiqwini se-valve, okuholela kuphrofayili ye-camshaft enolaka ukuze kwenziwe ngcono ukusebenza.
Ukugeleza komoya enjini kusizwa ama-throttles amabili aphansi abekwe phakathi kwamasilinda futhi abekwe ukuze enze isiphithiphithi esincane nokumelana nokugeleza komoya. Ukulethwa kukaphethiloli kungenziwa elungiselelwe isilinda ngasinye, kuthuthukiswe umnotho kanye nobubanzi. Indawo ephakathi nendawo ye-throttle body ivumela i-air box engu-11 litre ukuthi ihlale kahle ngaphezu kwenjini. Umthamo wekamelo lomoya ulungiselelwe ukusebenza kwenjini.
Umumo we-airbox uvumela isitaki sesivinini esishuniwe kumzimba ngamunye we-throttle, kusetshenziswa inertia ukuphoqelela isisindo somoya esiningi endaweni evuthayo, okwandisa ukuphuma kwamandla. I-airbox yenziwe inayiloni egcwele ingilazi enamaphiko akhelwe ngaphakathi ukuze isize ukudambisa ukuzwakala kanye nokudambisa umsindo wokungena. Izimbobo zokungenisa ezibheke phambili zisusa umsindo wokungena kumshayeli. Ukuqeda umsindo wokukhiphayo kuvumela umsindo ophelele wokukhipha amandla ukuthi ulawule.
Ukusebenza kahle kwenjini kuqinisekiswa uhlelo oluthembekile lwe-dry sump lubrication ne-oil reservoir eyakhelwe ku-crankcase casting. Amaphampu kawoyela kathathu akhipha uwoyela oweqile emakamelweni enjini amathathu (i-crankcase, i-stator chamber kanye ne-clutch chamber). Abagibeli bathola ukusebenza kahle kakhulu ngoba ukulahleka kwamandla e-parasitic kuncishisiwe ngenxa yokuthi izingxenye zangaphakathi zenjini akudingeki zijikeleze kuwoyela oweqile.
I-windshield ivimbela i-clutch ekushajeni uwoyela wenjini, okunganciphisa ukutholakala kukawoyela. Ngokuphakela uwoyela phakathi nendawo ye-crankshaft ukuya kumabhering wezinduku eziyinhloko nezixhumayo, lo mklamo uhlinzeka ngomfutho ophansi kawoyela (60-70 psi), onciphisa ukulahleka kwamandla e-parasitic at high rpm.
Ukunethezeka kokugibela kwe-Pan America 1250 kuqinisekiswa ibhalansi yangaphakathi eqeda ukudlidliza kwenjini, ethuthukisa ukunethezeka komgibeli kanye nokwelula ukuqina kwemoto. I-balancer eyinhloko, etholakala ku-crankcase, ilawula ukudlidliza okuyinhloko okudalwe i-crankpin, i-piston kanye nenduku yokuxhuma, kanye "ne-rolling clutch" noma ukungalingani kwesokunxele okubangelwa isilinda esingalungile. I-balancer engumsizi ekhanda lesilinda langaphambili phakathi kwama-camshaft igcwalisa ibhalansi eyinhloko ukuze kuqhutshekwe nokunciphisa ukudlidliza.
Okokugcina, iRevolution Max iyi-drivetrain ehlangene, okusho ukuthi injini no-gearbox onamagiya ayisithupha kubekwe endaweni eyodwa. I-clutch ifakwe ama- friction discs ayisishiyagalombili aklanyelwe ukuhlinzeka ngokuhlanganyela okuqhubekayo nge-torque enkulu kuyo yonke impilo ye-clutch. Ukunxephezela ama-springs ku-final drive bushelelezi ama-torque e-crankshaft ngaphambi kokuthi afinyelele ku-gearbox, okuqinisekisa ukuhanjiswa kwetorque ngokungaguquki.
Sekukonke, iRevolution Max 1250 V-Twin iyisibonelo esihle sokuthi kungani izithuthuthu ze-Harley-Davidson zisadingeka kangaka.
Abaxhasi bezinjini kuleli sonto yiPennGrade Motor Oil, Elring-Das Original neScat Crankshafts. Uma unenjini ongathanda ukuyigqamisa kulolu chungechunge, sicela uthumele i-imeyili kumhleli we-Engine Builder u-Greg Jones [i-imeyili ivikelwe]
Isikhathi sokuthumela: Nov-15-2022