Moteri Impinduka Zigihe Cyigihe: PM Ibice Birenze Ibigize Gakondo

Niki Guhindura Valve Igihe: Uburyo bukuru bwasobanuwe

Sisitemu ihindagurika ya sisitemu ihindura uburyo moteri yo gutwika imbere ihumeka. Ubu buryo bwubwenge buhindura imikorere ya valve kugirango hongerwe imikorere ya moteri mubihe bitandukanye. Sisitemu gakondo yagenwe-igihe ntishobora guhuza ubu bushobozi.

Amahame yoroshye yo gukora moteri ya Valve

Buri moteri yo gutwika imbereifite indangagaciro zikora nk'irembo. Bagenzura umwuka hamwe na lisansi ivanze muri silinderi (gufata valve) hanyuma bakareka imyuka isohoka igahunga (valves ziva). Camshafts itegura urujya n'uruza rwumukandara ukoresheje umukandara wigihe cyangwa urunigi ruhujwe na crankshaft.

Igikorwa cya Valve giterwa nibintu bitatu byingenzi:

• Igihe cyagenwe: Igihe nyacyo valve ifungura kandi yegeranye ugereranije na piston
• Igihe cyigihe: Ibihe byigihe biguma bifunguye
• Kuzamura indangagaciro: Intera ya intera irakinguye

Moteri gakondo hamwe nigihe cyagenwe cyagenwe gikomeza ibipimo bihoraho icyaricyo cyose moteri yihuta cyangwa umutwaro. Ibi bitera ubwumvikane-igenamigambi rikora neza kubintu bidafite akamaro kandi bito-RPM ya torque ntibitanga imbaraga nziza yihuta. Guhindura moteri bikenewe mubikorwa byayo bituma igihe cyagenwe kidakora neza.

Haguruka uva kuri Fixed to Variable Timing Sisitemu

Iterambere riva kumurongo uhindagurika uhinduka mugihe cyimyaka 100. Ba injeniyeri bagerageje na VVT nko mu 1903 (Cadillac, Porsche, na Fiat bayoboye inzira). 1980 Alfa Romeo Spider 2000 yabaye imodoka yambere itanga umusaruro wakoresheje VVT, hamwe na sisitemu ya mashini yagize ingaruka kumatara yo gufata gusa.

Iri koranabuhanga ryakuze vuba:

• 1983: Alfa Romeo yazanye VVT ​​ya elegitoroniki
• 1987: Nissan yatangije NVTCS (igihe cyagenzuwe na elegitoroniki)
• 1989: Honda yatangije VTEC hamwe na kamera ebyiri
• 1992: Porsche yasohoye VarioCam ifite ubushobozi bwo gukomeza guhinduka
• 2000: Ikoranabuhanga rya VVT ryabaye rusange

Ikiranga rimwe kigarukira kumodoka ikora ubu igaragara hose. Hafi ya moteri igezweho ikoresha uburyo bumwe bwo guhinduranya valve igihe. Ababikora bakoze sisitemu zabo - VVT-i ya Toyota na VCT ya Ford (Variable Camshaft Timing) iyobora paki.

Ubwoko butatu bwa VVT Sisitemu Ubwoko bwa Moteri Zigezweho

Uyu munsi impinduka ya valve igihe cyikoranabuhanga kiza muburyo butatu:

1. Sisitemu yo Kuringaniza KamereAbabikora benshi bakoresha faseri ya hydraulic yashyizwe kumashusho kugirango bazunguruke gato ugereranije na moteri yabo. Umuvuduko wamavuta ukora ubwo buryo bwo gutera imbere cyangwa kugabanya igihe cya valve mugihe cyose moteri ikora. Izi sisitemu zitezimbere igihe cyiza ariko ntishobora guhindura kuzamura valve cyangwa igihe.

2. Valve Lift Igenzura SisitemuAbabikora bamwe barenze igihe cyo guhindura kugirango bahindure lift. VTEC ya Honda yatangije ubu buryo. Ikoresha imyirondoro itandukanye hamwe na hydraulically acter rocker amaboko kugirango ihindure hagati yibikorwa byo hasi na byinshi. Ibi birema moteri zitandukanye ziranga RPM zitandukanye.

3. Sisitemu ikomeza guhindukaIterambere ryambere rya valve igihe cyikoranabuhanga gitanga amahitamo atagira ingano. Sisitemu ya Valvetronic ya BMW na Toyota ya Valvematic irashobora gutandukanya ibihe bya valve, igihe bimara, no kuzamura ubudahwema. Izi sisitemu zinoze zituma imibiri ya trottle gakondo idakenewe. Moteri irashobora "guhumeka" neza mubihe byose.

Sisitemu ihindagurika yigihe cya sisitemu ihagaze nkimwe mubyingenzi byateye imbere muburyo bwa moteri igezweho. Bagenzura imikorere ya valve neza kugirango batange imikorere myiza, kuzamura ubukungu bwa peteroli, hamwe n’ibyuka bihumanya ikirere.

PM Gukora Ibikorwa bya VVT

Ifu ya metallurgie igaragara nkubuhanga bwiza bwo gukora kubintu bihindagurika bya valve igihe. Itanga kugenzura neza ibintu bifatika muburyo ubundi buryo bwo gukora budashobora guhura. Inzira ikora ibice bigoye bifite ibipimo byiza kandi bikora neza moteri yumunsi ikeneye gusa.

Guhitamo ifu nuburyo bwo gutegura

Gukora ibice bidasanzwe bya VVT bitangirana no gutora ifu iburyo. Ababikora bakoresha ibikoresho bibiri bidasanzwe bivanze kubice byinshi bya VVT:

• Amavuta ya Mo-Cibyo bitanga ibice imbaraga zumunaniro utangaje (340 MPa nyuma yo kuvura ubushyuhe)
• Ibikoresho bya Fe - Cu - C.hamwe n'umuringa mwinshi ukora neza (220 MPa umunaniro)

Imyiteguro irambuye. Imashini ikora ivanga ifu nibipimo nyabyo kugirango ibone kuvanga. Kubona ifu neza ni ngombwa kuko ishushanya uburyo igice cyanyuma gikora. Uburyo bushya bwo guhuza ifu ntabwo bukoresha ibyuma gakondo, bityo rero nta myuka ihumanya yangiza ibidukikije.

PM igezweho ivanga neza neza, ifasha kuzuza imyenge iringaniye mugihe cyo guhuza. Gutemba neza bivuze ko imashini zishobora gukora ibice byihuse, kandi ibice bifite n'ubucucike. Ibi bifite akamaro kanini kubice bya VVT kuko ibipimo nyabyo bigira ingaruka kuburyo moteri ikora neza.

Gukomatanya no Gucumura Uburyo bwa Geometrike

Gahunda ya PM ihindura ifu ivanze neza mubice bikora binyuze munzira nyayo. Ifu ivanze igabanuka kuburemere ipfa bidasanzwe. Umuvuduko uri hagati ya 150 MPa na 900 MPa (ukurikije ubwoko bwibintu) ukanda ifu mubyo twita "icyatsi".

PM ireka abayikora bakora imiterere yimbere ninyuma ikoresheje tekinoroji ya net-net. Bashobora gukora ibintu byoroshye nkibice bya tekinike-bigenzura igihe cya valve - mugihe cyo guhuza. Ibi bizigama umwanya mugukata imashini nyinshi ubundi buryo bwo gukora bwakenera.

Ibi bice byicyatsi noneho bijya mu ziko ryihariye hamwe nikirere kigenzurwa. Ubushyuhe buhuye nibikoresho 'gushonga. Gucumura bihuza ibice hamwe kandi bigakora umwanya aho bikenewe. Iyi ntambwe rwose ifite akamaro kubice bya VVT kuko igena niba ibice bizagumana ubunini bwabyo-bigira ingaruka kumwanya wa moteri.

Ubuvuzi bwa Surface kubikorwa byongerewe imbaraga

Kuvura hejuru bituma ibice bya VVT bikora neza kurushaho. Fosifatike ya Manganese ni urugero rwiza-ituma ibyinjira byinjira cyane bidashoboka gutera amakimbirane. Ubu buvuzi bufasha moteri kuzigama lisansi, niyo mpamvu sisitemu yoguhindura igihe cyingirakamaro.

Imyenda ya DLC (Diamond-Nka Carbone) irashobora kugabanya ubukana kugera kuri 66% kubice byanyerera cyane. Bamwe mubakora kandi bakoresha inzira zidasanzwe nka chromizing na vanadizing kugirango isura igaragara cyane (Hv1400 kugeza Hv2000). Iyi mirimo ikora neza kuruta kwivuza bisanzwe.

Iterambere ryubuso rifasha ibice bya VVT kumara igihe kinini mubihe bigoye bya moteri. Ibice bifite impuzu zidasanzwe byerekana ibisubizo bitangaje-micron 10 gusa yo kwambara nyuma ya 200.000 km yo gukoresha.

Gahunda ya PM yose ikora ibice bya VVT biramba, byuzuye, kandi bikora cyane. Iki nikintu kinini kuko bivuze ko tekinoroji ya valve ihindagurika ishobora gukora moteri igezweho kurushaho.

2025 Ibizamini by'imikorere: PM n'ibigize gakondo

Ibizamini byacu 2025 byerekana impamvuifu ya metallurgie (PM) ibicegukubita bagenzi babo basanzwe bakora muri sisitemu ihindagurika ya valve. Ibizamini bya laboratoire hamwe nisuzuma ryerekana ko ibyo bice bikora neza kuri byinshi murwego rwingenzi.

Kugereranya Imbaraga Umunaniro (340 MPa na 220 MPa)

PM nibigize gakondo byerekana itandukaniro rinini mugupima imbaraga zumunaniro. PM-yakozwe na "ihuza A" ibice biva muri Fe-Mo-C ibishishwa bigera ku munaniro ushimishije wa340 MPanyuma yo kuvura ubushyuhe. Ibigize "kwinjiza kamera" bikozwe mubikoresho byacumuye Fe-Cu-C bigera gusa220 MPa. Iterambere rya 54% risobanura ibice bimara igihe kinini murwego rwo gupakira ibintu wasanga muri moteri ihindagurika ya valve igihe.

Ibi bice birashobora gukoresha miriyoni zindi zikora mbere yo kwerekana kwambara. Ibi bigira itandukaniro rinini mugukomeza igihe cya valve neza mubuzima bwa moteri.

Isesengura rito hamwe no gusesengura kwihanganira

Gukora PM bitanga bidasanzweguhuza ibipimo. Ibizamini byemeza ibice bya PM byihanganira hafi± 0,04 mm. Ibi bisobanuro bifatika hagati yibyumba bituranye byingutu muri sisitemu yubwoko.

Ifu nziza yifu ifasha kuzuza imyenge byihuse kandi biringaniye mugihe cyo gukora. Igisubizo? Ikwirakwizwa ryinshi. Ibice birangirana no gutandukana muburemere n'uburebure. Ntushobora kubona ubu buryo busobanutse hamwe nuburyo busanzwe bwo gukora mugihe ukora geometrike igoye.

Ibisubizo Byinshi-Ubushyuhe Buramba

Ibice bya VVT bigomba guhangana nubushyuhe bukabije, butuma ubushyuhe budasanzwe. Ibice bya PM bigumaho neza kuva-40 ° C kugeza kuri 150 ° C.. Ibi bikubiyemo ibintu byose kuva ubukonje bwa arctique butangira gukurura imitwaro yubushyuhe.

Ibice bya PM byerekana microstructural stabilite. Guhuza ifu yambere hamwe no gukwirakwiza umuringa bifasha ibyo bice kuguma bihagaze neza mugihe cyimihindagurikire yubushyuhe. Ibi bifite akamaro kanini kuri sisitemu ya VVT kuko no kugoreka ibintu bito bito bishobora guhindura igihe cya moteri n'imikorere.

Wambare Kurwanya Mubihe Bikabije

Ibice bya PM bimara igihe kinini kuruta ibice gakondo mubihe bikomeye. Ibice byavuwe na PM byerekana ko biramba bidasanzwe. Imyenda idasanzwe yerekana gusaMicron 10 yo kwambara nyuma ya 200.000 kmyo gukoresha.

Ibice bya PM hamwe nibikoresho byongera imashini bigabanya burr mugihe cyo gutema guhagarikwa, gucukura umwobo muremure, no gukanda. Ubushobozi budasanzwe bwa PM bwo kuvanga karbide zikomeye muburyo bwibintu bitera kwihanganira kwambara bisanzwe inganda gakondo zidashobora guhura.

Izi nyungu zimikorere zisobanura impamvu ifu ya metallurgie iyobora inzira mugukora ibintu bikomeye bihindagurika bya valve igihe cyibikoresho bya moteri igezweho.

Ubumenyi bwibikoresho inyuma yimikorere ya PM

Ifu ya metallurgie ikora ibintu bifatika kurwego rwa atome guterana gusa ntibishobora guhura. Ubu busobanuro kurwego rwa molekuline busobanura impamvu ibice bya PM bikora neza muri sisitemu yo guhinduranya valve.

Fe-Mo-C Amavuta ya High-Stress Porogaramu

Amavuta ya Fe-Mo-C yerekana umunaniro utangaje bitewe na kamere ya molybdenum. Iyi mavuta irakomeye ndetse no ku bushyuhe bwo hejuru bwa 1500 ° C. PM yahimbwe na PM igera kumunaniro wa 340 MPa, ikubita ibikoresho gakondo cyane. Ikibanza kinini cyo gushonga (2620 ° C) cyibintu bya molybdenum bibafasha kurwanya ihungabana ryubushyuhe, bigatuma biba byiza kubidukikije bishyushye byimikorere ihindagurika ya valve.

Ongeramo ibintu bike (Ti, Zr, C) muri titanium-zirconium molybdenum ivanze byongera imbaraga nubukonje mubushyuhe bwinshi. Ababikora barashobora guhuza neza ibyo bivanga muguhitamo neza no gutegura ifu. Ibi birema ibice biguma bihagaze neza nkuko ubushyuhe bwa moteri buhinduka.

Cu-Yongerewe Ibikoresho byo Kugabanya Ubuvanganzo

Cu-yongerewe ibikoresho bya PM ihindura umukino mukugabanya ubukana. Ibizamini byerekana ko Cu @ Graphite ibice bisiga amavuta bigabanya ubushyamirane hagati yo gukoraho hejuru ya 400%. Iri terambere rinini ribaho kuberako ibice byumuringa byuzuza utuntu duto duto mugihe grafite ituma ibice bibiri bitandukanya.

Umuringa wa nanoparticles kandi utera imbaraga zo kurwanya kwambara no gufasha ibice gutwara imitwaro iremereye muri sisitemu yo guhinduranya igihe. Ndetse n'utuntu duto twinshi twongeweho (0.3% gusa kuburemere) gabanya ubushyamirane ukoresheje ingamba zifatika.

Isesengura rya Microstructure y'Ibice Byacumuye

Imikorere yibigize biterwa nuburyo ugenzura neza ibintu bine byingenzi mugihe cyo gucumura: ubwoko bwifu, ingano yingirakamaro, ingano ya binder, hamwe nuburyo bwo gucumura. Izi ngingo zigize igice cyanyuma cyo kwikinisha, gukomera, no gukora stress.

Urebye kuri microstructure yerekana uburyo gucumura bikora imiterere myiza:

• Ubushyuhe bwo hejuru bukabije butera Ostwald yeze, aho uduce duto dushonga kandi tugahindura kuri nini kugirango tugabanye imbaraga zingana
• Ibice bikenera byibura iminota 75 hejuru yubushyuhe bwo hejuru kugirango ubone imiterere imwe ikenewe kugirango imbaraga zidatandukana neza
• Ibirimo bya karubone bigira ingaruka kumiterere yimiterere nuburyo bwimbuto, bigena ubucucike bwa nyuma nibikorwa

Abakora PM barashobora gukora microstructures idasobanutse neza mugenzura neza ibi bintu. Ubu busobanuro butuma ibi bice byingenzi muri sisitemu igezweho ya valve igihe.

Ibibazo byubwubatsi byakemuwe na tekinoroji ya PM

Ifu ya metallurgie (PM) igira uruhare runini mugukemura ibibazo bikomeye uburyo busanzwe bwo gukora budakora neza mubuhanga bwa powertrain. Abakora amamodoka bakeneye sisitemu yo guhindura ibintu neza, kandi tekinoroji ya PM itanga ibisubizo nyabyo kubibazo byashizweho mbere.

Umusaruro wa Geometrie utoroshye udafite imashini

Ikoranabuhanga rya PM rikora ibishushanyo mbonera bigize intambwe imwe. Uburinganire bwa geometrike yibikoresho bya VVT bifite ibice byimbere, imiterere yinyo, hamwe no kugabanya ibiro bituma baba abakandida beza mubikorwa bya PM. Ibinet-shusho cyangwa hafi-net-ishusho yumusaruroubushobozi bugabanya ibikorwa bya kabiri cyane. Ibice bya PM bitunganijwe binyuze mumashanyarazi yicyatsi ikora inshuro icyenda kurenza imashini isanzwe nyuma yo gucumura. Iterambere mugukora imiterere igoye idafite imashini nini ihindura imikorere ya sisitemu ya VVT.

Kugabanya Ibiro Mugihe Gukomeza Imbaraga

Umusanzu ukomeye wa PM uri mukugabanya ibiro. Aluminium spockets na rotor mumashanyarazi ya kameri ipima garama 450, nikintu kinini kuko bivuze ko ari kimwe cya kabiri cyuburemere bwa garama 900 zacumuye ibyuma. Kugabanya ibiro byongera ingufu za peteroli kandi bigabanya ibyuka bihumanya. Tekinoroji ya PM igezweho ihuza ibintu byoroheje mugihe irinda ubusugire bwimiterere-ingenzi kubikorwa bya VVT ihangayikishije cyane.

Gukwirakwiza Coefficient Coefficient

Ikoranabuhanga rya PM ritanga kugenzura neza ibiranga ubushyamirane. Ubuvuzi bwihariye bwo kuvura nka manganese fosifatiya hamwe na DLC bifasha ibice bya PM kugera kuri coefficient nkeya. Imikorere ya moteri iratera imbere mugihe ibice bigize PM bigabanya kugabanya lisansi 1%. Ufatanije namavuta make-viscosity amavuta, ibyo bice bitanga kuzigama lisansi hagati ya 2-4%.

Igiciro-Cyiza Gukora Kumunzani

Inganda za PM zitanga inyungu zubukungu. Inzira ikoresha hejuru ya 98% y'ibikoresho byinjiza hamwe n'imyanda mike. Ikoranabuhanga rya PM risaba ingufu nke ugereranije no gutara gakondo no guhimba, bizana inyungu zibidukikije ndetse nigiciro. Ubushobozi bwa PM bwo gukora ibice bigoye hamwe nuburinganire buringaniye bituma biba igisubizo cyubukungu cyane kubyara umusaruro wa VVT.

Umwanzuro

Ibisubizo by'ibizamini hamwe nisesengura byerekana impamvu ibice bya powder metallurgie aribwo buzima-maraso ya sisitemu igezweho ya valve igihe. Ibi bice bikora neza kuruta ubundi buryo busanzwe kandi bigera ku ntera ishimishije ya 340 MPa - iterambere rya 54% muburyo busanzwe bwo gukora.

Ibisubizo bishushanya neza. Ibice bya PM bifite igihe kirekire, bikomeza kwihanganira neza, kandi bigakora neza mubushyuhe bukabije kuva kuri -40 ° C kugeza kuri 150 ° C. Kugabanya ibiro byabo 50% mugihe gukomeza uburinganire bwimiterere bituma biba ingenzi kubakora ibinyabiziga bibanda kubikorwa bya peteroli no kugabanya ibyuka bihumanya.

Inyungu z'umusaruro nazo ziragaragara. Gahunda ya PM ikoresha 98% yibikoresho byinjiza kandi ikora imyanda mike ugereranije nibikorwa gakondo. Ibiranga imikorere isumba izindi kandi urwego rwimikorere rutuma ifu ya metallurgie yatsindiye neza umusaruro wa VVT.

Ibisubizo by'ibizamini 2025 byerekana koIbigize PM bizakomeza ubuzima-maraso ya sisitemu igezweho ya sisitemu. Zitanga ibisobanuro, biramba, nuburyo bukenewe bwimodoka zigezweho zikeneye.

Ibibazo

Q1. Ni izihe nyungu nyamukuru za powder metallurgie (PM) muri sisitemu ihindagurika ya valve? 

Ibice bya PM bitanga umunaniro mwinshi (340 MPa vs 220 MPa kubice gakondo), neza neza neza, kunanirwa kwambara, no kongera imikorere mubushyuhe bukabije (-40 ° C kugeza 150 ° C). Bemerera kandi geometrike igoye no kugabanya ibiro cyane mugihe bakomeza imbaraga.

Q2. Nigute tekinoroji ya valve igihe (VVT) itezimbere imikorere ya moteri? 

Sisitemu ya VVT itezimbere imikorere ya valve mubihe bitandukanye bya moteri, bigatuma habaho ingufu za peteroli (kugabanuka kugera kuri 15% mugihe cyo gukora), kongera imikorere, no kugabanya ibyuka bihumanya. Bemerera moteri guhuza n'umuvuduko utandukanye kandi ikaremerera neza kuruta sisitemu yagenwe.

Q3. Ni ubuhe bwoko butandukanye bwa sisitemu yo guhinduranya ibihe ikoreshwa muri moteri zigezweho? 

Hariho ubwoko butatu bwingenzi bwa sisitemu ya VVT: sisitemu yo gukuramo kamera ihindura igihe cya valve, sisitemu yo kugenzura valve ihindura kuzamura valve, hamwe na sisitemu zihoraho zishobora guhindura ibipimo byinshi birimo igihe, igihe, na lift.

Q4. Nigute inzira yo gukora ibice bya PM itandukanye nuburyo gakondo? 

Gukora PM bikubiyemo guhitamo ifu yitonze, guhuza neza, no gucumura kugirango ukore ibice bigoye hamwe no gukora bike. Ubu buryo butuma hafi-net-yerekana umusaruro, igabanya imyanda, kandi igafasha kurema ibice bifite ibikoresho byihariye bigenewe porogaramu za VVT.

Q5. Nibihe bisobanuro byo gukoresha ibice bya PM muri sisitemu ihindagurika ya valve? 

Mugihe ibiciro byambere bishobora kuba byinshi, ibice bya PM bitanga inyungu zigihe kirekire bitewe nigihe kirekire, kugabanuka kubikenewe, no kongera ingufu za peteroli. Igikorwa cyo gukora nacyo gifite ubukungu murwego, ukoresheje hejuru ya 98% yibikoresho byinjira kandi bisaba ingufu nke ugereranije no gutara gakondo no guhimba.