IiNkqubo zeXesha eziGuquguqukayo zeNjini: Amacandelo e-PM Asebenza Ngakumbi Amacandelo eNdabuko

Yintoni eguquguqukayo Ixesha leValve: IiNdlela ezingundoqo ziyachazwa

Iinkqubo zexesha levalvu eziguquguqukayo ziguqula indlela iinjini zokutsha zangaphakathi eziphefumla ngayo. Ezi ndlela zikrelekrele ziguqula ukusebenza kwevalvu ukuze kuphuculwe ukusebenza kwe-injini phantsi kweemeko ezahlukeneyo. Iinkqubo zesiNtu ezimiselweyo azikwazi ukuhambelana nobu buchule.

Imigaqo elula yokuSebenza kweValve ye-Injini

Yonke injini yokutshisa yangaphakathiineevalvu ezisebenza njengabagcini-masango. Balawula ukuhamba komoya kunye nomxube we-fuel kwi-cylinders (iivalvu zokungena) kwaye bavumele i-exhaust gasses ukuba iphume (iivalvu zokukhupha). Ii-Camshafts zilungelelanisa ezi zivalo 'intshukumo ngebhanti lexesha okanye ikhonkco eliqhagamshelwe kwi-crankshaft.

Ukusebenza kwevalve kuxhomekeke kwizinto ezintathu eziphambili:

• Ixesha levalvu: Elona xesha lichanekileyo iivalvu zivula kwaye zisondele xa kuthelekiswa nendawo yepiston
• Ubude bevalvu: Iivalvu zexesha zihlala zivulekile
• Ukunyuswa kwevalvu: Iivalvu zomgama ziyavuleka

Iinjini zemveli ezinexesha elimiselweyo levalvu zigcina ezi parameters zingaguquguquki nokuba sisantya okanye isantya senjini. Oku kudala ukuthomalalisa-iisetingi ezisebenza kakuhle kukungasebenzi kakuhle kunye netorque ephantsi ye-RPM ayinikezeli amandla afanelekileyo anesantya esiphezulu. Ukutshintsha kweemfuno ze-injini kulo lonke uluhlu lwayo lokusebenza kwenza ukuba ixesha elimiselweyo lingasebenzi kakuhle.

Ukunyuka ukusuka kwi-Fixed ukuya kwiiSystems zexesha eziguquguqukayo

Inkqubela ukusuka kwisigxina ukuya kwixesha eliguquguqukayo lithatha phantse iminyaka eyi-100. Iinjineli zazama iVVT kwangethuba ngo-1903 (iCadillac, iPorsche, kunye neFiat zikhokele indlela). I-1980 Alfa Romeo Spider 2000 yaba sisithuthi sokuqala sokuvelisa ukusebenzisa i-VVT, kunye nenkqubo yomatshini echaphazela iivalvu zokungena kuphela.

Le teknoloji yakhula ngokukhawuleza:

• Ngowe-1983: UAlfa Romeo wazisa iVVT yombane
• Ngowe-1987: I-Nissan yasungula i-NVTCS (ixesha elilawulwa nge-elektroniki)
• Ngo-1989: I-Honda yaqala i-VTEC ngeeprofayili zekhamera ezimbini
• I-1992: I-Porsche ikhuphe i-VarioCam enekhono lohlengahlengiso oluqhubekayo
• 2000s: Itekhnoloji yeVVT yaba yinto eqhelekileyo

Into ekhe yakhawulelwa kwiimoto zokusebenza ngoku ibonakala kuyo yonke indawo. Phantse yonke injini yale mihla isebenzisa uhlobo oluthile lwexesha levalvu. Abavelisi baye baphuhlisa iinkqubo zabo-iToyota VVT-i kunye neVCT yeFord (Variable Camshaft Timing) ikhokela ipakethi.

Iintlobo ezintathu zeNkqubo yeVVT kwiiNjini zanamhlanje

Itekhnoloji yanamhlanje yokutshintsha ixesha levalvu iza ngeendlela ezintathu ezahlukeneyo:

1. IiNkqubo zeCam PhasingUninzi lwabavelisi basebenzisa i-hydraulic phasers efakwe kwi-camshafts ukuyijikeleza kancinane xa kuthelekiswa ne-sprockets zabo zokuqhuba. Uxinzelelo lwe-oyile luvula ezi zixhobo ukuze ziqhubele phambili okanye zicuthe ixesha levalvu kulo lonke uluhlu lokusebenza kwe-injini. Ezi zixokelelwano zikhulisa ixesha levalvu kakuhle kodwa azikwazi ukutshintsha ukunyuswa kwevalvu okanye ubude bexesha.

2. Iinkqubo zokuLawula iValve LiftAbanye abavelisi bahamba ngaphaya kohlengahlengiso lwexesha lokuguqula ukunyuswa kwevalvu. I-VTEC yakwaHonda ibe nguvulindlela kule ndlela. Isebenzisa iiprofayili zecam ezahlukeneyo kunye neengalo zerocker ezisebenza ngomatshini ukutshintshela phakathi kwemisebenzi ephantsi kunye nephezulu. Oku kudala iimpawu ezahlukeneyo zenjini kuluhlu olwahlukeneyo lweRPM.

3. Iinkqubo eziguquguqukayo eziqhubekayoItekhnoloji yexesha eliguquguqukayo eliphezulu kakhulu libonelela ngokhetho olungenasiphelo lohlengahlengiso. Iisistim zeValvetronic zeBMW kunye neToyota Valvematic zinokwahluka ixesha levalvu, ubude bexesha, kunye nokunyuswa ngokuqhubekayo. Ezi nkqubo zintsonkothileyo zenza ukuba imizimba yesiqhelo ye-throttle ingabi yimfuneko. Iinjini ziyakwazi "ukuphefumla" ngokufanelekileyo kuzo zonke iimeko.

Iinkqubo zevalvu eziguquguqukayo zexesha zime njengenye yenkqubela phambili ebalulekileyo kuyilo lwenjini yanamhlanje. Balawula ukusebenza kwevalvu ngokuchanekileyo ukuhambisa ukusebenza okungcono, uqoqosho oluphuculweyo lwamafutha, kunye nokukhutshwa okuphantsi.

Inkqubo yokuVelisa i-PM yee-VVT Components

I-metallurgy yomgubo ibalasele njengeyona ndlela ibalaseleyo yokwenziwa kwezixhobo zexesha levalvu. Inika ulawulo oluchanekileyo kwiipropati eziphathekayo ngeendlela ezinye iindlela zokuvelisa ezingenako ukuhambelana. Inkqubo idala iinxalenye ezintsonkothileyo ezinobungakanani obugqibeleleyo kunye nokusebenza okuphezulu okufunwa ziinjini zanamhlanje.

Ukukhetha uPowder kunye neendlela zokuLungisa

Ukwenza izinto ezikhethekileyo zeVVT kuqala ngokuchola umgubo ochanekileyo. Abavelisi basebenzisa imixube emibini yemathiriyeli ekhethekileyo kwiindawo eziphezulu zeVVT:

• Ii-alloys ze-Fe-Mo-Cenika amalungu amandla okudinwa okumangalisayo (340 MPa emva konyango lobushushu)
• Iimathiriyeli ze-Fe-Cu-Ckunye nomxholo ophezulu wobhedu osebenza ngokuthembekileyo (220 MPa amandla okukhathala)

Ulungiselelo luneenkcukacha kakhulu. Iiblender ezizenzekelayo zixuba umgubo kunye nemilinganiselo echanekileyo ukufumana umxube olinganayo. Ukufumana umgubo ngokufanelekileyo kubalulekile kuba kubumba indlela inxalenye yokugqibela esebenza ngayo. Iindlela ezintsha zokudibanisa umgubo azisebenzisi i-stearates zesinyithi zesintu, ngoko ke akukho zinc ezikhutshwayo zokonakalisa okusingqongileyo.

I-PM yanamhlanje ixuba ihamba ngcono, enceda ukugcwalisa i-cavities ngokulinganayo ngexesha lokuxinana. Ukuhamba ngcono kuthetha ukuba oomatshini bokushicilela banokwenza iindawo ngokukhawuleza, kwaye amalungu anoxinano olulinganayo. Oku kubaluleke kakhulu kumacandelo e-VVT kuba ubungakanani obuchanekileyo buchaphazela indlela injini eqhuba ngayo.

Iindlela zokuNxibelela kunye neSintering kwiiJometri eziNxaxheba

Inkqubo ye-PM ijika ezi powders zixutywe ngononophelo zibe ngamalungu asebenzayo ngokwamanyathelo achanekileyo. Umxube womgubo wehla ngomxhuzulane ube ziintlobo ezikhethekileyo. Uxinzelelo phakathi kwe-150 MPa kunye ne-900 MPa (esekelwe kuhlobo lwezinto eziphathekayo) icinezela umgubo kwinto esiyibiza ngokuba "luhlaza" inxalenye.

I-PM ivumela abavelisi ukuba benze iimilo ezintsonkothileyo zangaphakathi nangaphandle besebenzisa iindlela ezikufutshane ne-net-shape. Banokwenza iimpawu ezikhohlisayo njenge-helical splines-elawula ixesha levalvu-echanekileyo ngexesha lokuxinana. Oku konga ixesha ngokusika oomatshini abaninzi abaya kufuna ezinye iindlela zokuvelisa.

Ezi nxalenye eziluhlaza ke zingena kwiziko ezikhethekileyo ezinomoya olawulayo. Ubushushu buhambelana namanqaku okunyibilika kwemathiriyeli. I-Sintering idibanisa amasuntswana kunye nokudala izithuba apho kuyimfuneko. Eli nyathelo libaluleke ngokwenene kumacandelo e-VVT kuba limisela ukuba iinxalenye ziya kugcina ubungakanani bazo obuchanekileyo-nto leyo echaphazela ixesha le-injini.

Unyango loMphezulu woKusebenza okuPhuculweyo

Unyango olungaphezulu lwenza ukuba amacandelo e-VVT asebenze ngcono. I-Manganese phosphating ngumzekelo omhle-yenza iikhamera zokufaka igalelo zincinci kakhulu ukudala ingxabano. Olu nyango lunceda iinjini zonge amafutha, yiyo loo nto iinkqubo zexesha levalvu eziguquguqukayo ziluncedo.

Iingubo ze-DLC (I-Diamond-NjengeCarbon) inokunciphisa ukungqubana ukuya kuthi ga kwi-66% kwiindawo ezityibilika ngokuchasene nenye kakhulu. Abanye abavelisi bakwasebenzisa iinkqubo ezikhethekileyo ezifana nechromizing kunye ne-vanadizing ukwenza umphezulu ube nzima kakhulu (Hv1400 ukuya kwi-Hv2000). Ezi zisebenza ngcono kakhulu kunonyango lwe-carburizing eqhelekileyo.

Olu phuculo lomphezulu lunceda amacandelo e-VVT ahlale ixesha elide kwiimeko ezinzima ze-injini. Amacandelo aneengubo ezikhethekileyo abonisa iziphumo ezimangalisayo-kuphela i-microns eyi-10 yokugqoka emva kwe-200,000 km yokusetyenziswa.

Yonke inkqubo ye-PM idala amacandelo e-VVT ahlala ixesha elide, achanekileyo, kwaye asebenza kakhulu. Le yinto enkulu njengoko ithetha ukuba itekhnoloji yexesha levalvu eguquguqukayo inokwenza iinjini zanamhlanje zisebenze ngakumbi.

Iimvavanyo zokuSebenza zika-2025: PM vs

Uvavanyo lwethu lokusebenza luka-2025 lubonisa ukuba kutheniumgubo wesinyithi (PM) amacandelobabethe oogxa babo abenziwe ngokwesiko kwiinkqubo zevalvu eziguquguqukayo. Uvavanyo lwaseLab kunye novavanyo lomhlaba lungqina ukuba la macandelo asebenza ngcono kakhulu kuyo yonke i-metric engundoqo.

Ukudinwa Amandla Uthelekiso (340 MPa vs. 220 MPa)

I-PM kunye namacandelo emveli abonisa umahluko wabo omkhulu kwimilinganiselo yamandla okukhathala. I-PM-eyenziwe "ikhonkco A" amacandelo avela kwi-sintered Fe-Mo-C alloys afikelela kumandla okudinwa okuchukumisayo.340 MPaemva kokunyanga ubushushu. Izixhobo zemveli "zekhamera yokufakwayo" ezenziwe ngezinto ezifakwe kwi-Fe-Cu-C zifikelela kuphela220 MPa. Oku kunyuswa kwe-54% kuthetha ukuba amalungu ahlala ixesha elide phantsi kweemeko zokulayisha umjikelo onokuzifumana kwiisistim ze-injini eziguquguqukayo zevalvu.

La malungu anokuphatha izigidi zemijikelo yokusebenza ngakumbi phambi kokubonisa ukunxitywa. Oku kwenza umahluko omkhulu ekugcineni ixesha levalve lichanekile kubo bonke ubomi benjini.

Ukuchaneka kweDimensional kunye noHlalutyo loNyamezelo

Imveliso ye-PM inikezela ngendlela ekhethekileyoukuhambelana komda. Uvavanyo luqinisekisa amacandelo e-PM ekunyamezeleni malunga±0.04 mm. Olu coceko luqinile lubalulekile phakathi kwamagumbi anoxinzelelo angabamelwane kwiinkqubo zohlobo lwe-vane.

Ukuhamba komgubo ongcono kunceda ukuzalisa imingxuma ngokukhawuleza nangakumbi ngokulinganayo ngexesha lokuvelisa. Isiphumo? Unikezelo loxinaniso oluhambelanayo. Amalungu aphela ngokuhluka okuncinci kubunzima kunye nobude. Awunakulufumana olu hlobo lokuchaneka ngeendlela eziqhelekileyo zokwenziwa xa usenza iijometri zeVVT ezinzima.

Iziphumo zokuZinzisa ubushushu obuphezulu

Amacandelo e-VVT kufuneka aphathe ubushushu obugqithisileyo, okwenza kubaluleke kakhulu ukumelana nobushushu. Amacandelo e-PM ahlala esandi ukusuka-40°C ukuya kwi-150°C. Oku kugubungela yonke into ukusuka kwingqele ye-arctic iqala ukuya kwimithwalo ephezulu yobushushu.

Amalungu e-PM abonisa ukuzinza okuphawulekayo kwe-microstructural. I-powder bonding ephezulu kunye nokuhanjiswa okungcono kobhedu kunceda ezi zixhobo ukuba zihlale zizinzile ngexesha lokutshintsha kweqondo lokushisa. Oku kubaluleke kakhulu kwiinkqubo ze-VVT kuba nokuphazamiseka okuncinci kwe-thermal kunokuchaphazela ixesha kunye nokusebenza kwe-injini.

Nxiba ukuxhathisa phantsi kweemeko ezigqithisileyo

Amacandelo e-PM ahlala ixesha elide kuneenxalenye zendabuko phantsi kweemeko zoxinzelelo oluphezulu. Amalungu e-PM anyangwe ngomphezulu abonakalisa ukuqina ngokumangalisayo. Ezinye iingubo ezikhethekileyo zibonisa njeIi-microns ezili-10 zokunxiba emva kwe-200,000 kmyokusetyenziswa.

Amacandelo e-PM anezixhasi ezithile zomatshini anciphisa ukubunjwa kwe-burr ngexesha lokusikwa okuphazamisekileyo, ukugrumba umngxuma onzulu, kunye nokusebenza ngokucofa. Ikhono elikhethekileyo le-PM lokuxuba i-carbides enzima kwisakhiwo sezinto eziphathekayo kudala ukunyanzeliswa kwendalo yokunxiba ukuba imveliso yendabuko ayinakuhambelana.

Ezi zibonelelo zokusebenza zichaza ukuba kutheni i-metallurgy engumgubo ikhokelela ekuveliseni amacandelo abalulekileyo exesha levalvu yeenjini zangoku eziphezulu.

INzululwazi yeMathiriyeli eNgemva koMsebenzi oPhezulu we-PM

I-metallurgy yomgubo idala indibaniselwano yemathiriyeli kwinqanaba le-athomu enokuthi ukugatywa kungahambelani. Oku kuchaneka kwinqanaba le-molecular kuchaza ukuba kutheni iindawo ze-PM zisebenza ngcono kwiinkqubo zexesha le-valve.

I-Fe-Mo-C Alloys ye-High-Stress Applications

Ii-alloys ze-Fe-Mo-C zibonisa ukuxhathisa ukudinwa okumangalisayo ngenxa yeempawu zendalo ze-molybdenum. Ezi ngxubevange zomelele nakubushushu obuphezulu obuyi 1500°C. Ii-alloys ezenziwe nge-PM zifikelela kwimilinganiselo yamandla okudinwa kwe-340 MPa, ebetha izinto zemveli ngobuninzi. Iqondo eliphezulu lokunyibilika (2620 ° C) leekhompawundi ze-molybdenum libanceda ukuba baxhathise ukuphuka kobushushu, nto leyo ebenza bagqibelele kwindawo eshushu yeendlela zokutshintsha ixesha levalvu.

Ukongeza izinto ezincinci (Ti, Zr, C) kwimixube ye-titanium-zirconium molybdenum iphucula amandla abo kunye nobunzima kumaqondo aphezulu. Abavelisi banokulungisa le mixube ngokucokisekileyo ngokukhetha ngocoselelo kwaye balungiselele ii powders. Oku kudala iindawo ezihlala zizinzile ngokwemilinganiselo njengoko amaqondo obushushu enjini etshintsha.

Cu-Enhanced Materials for Friction Reduction

Izinto eziphuculweyo ze-PM zitshintsha umdlalo ekunciphiseni ukungqubana. Uvavanyo lubonisa ukuba i-Cu@Graphite iindawo eziqinileyo ze-lubricant zisika ingxabano phakathi kweendawo ezibambayo ngaphezulu kwe-400%. Olu phuculo lukhulu lwenzeka ngenxa yokuba amasuntswana obhedu agcwalisa iziphene ezincinci ngelixa igraphite igcina izibini zokukhuhlana zahlukene.

Iinanoparticles zethusi zikwanyusa iipropathi ezichasene nokunxiba kunye neengxenye zokunceda ukuphatha imithwalo ephezulu kwiinkqubo zexesha le-camshaft eziguquguqukayo. Kwanezixa ezincinci zezi zongezo (nje nge-0.3% ngobunzima) zinqumle ukukhuhlana ngokuzinza ngobuchule kwiindawo zokuhlikihla.

Uhlalutyo lweMicrostructure yeSintered Components

Ukusebenza kwecandelo kuxhomekeke kwindlela olawula ngayo izinto ezine eziphambili ngexesha le-sintering: uhlobo lomgubo, ubungakanani besuntswana, inani le-binder, kunye neemeko ze-sintering. Ezi zinto zibumba inxalenye yokugqibela ye-porosity, ukuqina, kunye nokusebenza koxinzelelo.

Ukujonga i-microstructure ibonisa indlela i-sintering eyenza ngayo isakhiwo esifanelekileyo:

• Amaqondo obushushu aphezulu e-sintering adala ukuvuthwa kwe-Ostwald, apho amasuntswana amancinci anyibilikayo kwaye ahlaziye amakhulu ukuze asasaze amandla ngokulinganayo.
• Amalungu afuna ubuncinci imizuzu engama-75 kwiqondo lobushushu eliphakamileyo ukuze afumane ubume obufanayo obufunekayo ukuze kugqabhuke ukomelela.
• Umxholo wekhabhoni uchaphazela ukubunjwa kwesigaba solwelo kunye nokumila okuziinkozo, okumisela ukuxinana kokugqibela kunye nokusebenza

Abavelisi be-PM banokwenza i-microstructures echanekileyo ngokumangalisayo ngokulawula ngononophelo ezi zinto. Oku kuchanekileyo kwenza ezi ndawo zibaluleke kwiinkqubo zangoku zevalvu eziguquguqukayo.

Imingeni yobuNjineli Isonjululwe yi-PM Technology

I-Metallurgy yomgubo (PM) idlala indima ebalulekileyo ekusombululeni imiceli mngeni ebalulekileyo apho iindlela zokuvelisa eziqhelekileyo zingajongani kakuhle nazo kubunjineli boqeqesho lwamandla. Abenzi bee-Automakers badinga iinkqubo ezisebenza ngakumbi zevalvu eguquguqukayo, kwaye itekhnoloji ye-PM ibonelela ngezisombululo eziqinisekileyo kwimingeni yoyilo ebingasombululeki ngaphambili.

Imveliso yeJiyometri entsonkothileyo ngaphandle koMatshini

Itekhnoloji ye-PM yenza uyilo lwecandelo elintsonkothileyo kwinyathelo elinye lokuvelisa. Iijometri ezintsonkothileyo zamacandelo e-VVT aneentlobo zangaphakathi, iiprofayili zamazinyo, kunye neempawu zokunciphisa ubunzima zibenza babe ngabaviwa abagqibeleleyo bokwenza i-PM. Okui-net-shape okanye imveliso ekufutshane ne-net-shapeukukwazi kunciphisa imisebenzi yesibini kakhulu. Amacandelo e-PM acutshungulwa ngoomatshini obuhlaza asebenza ngokuphindwe alithoba ngokukhawuleza kunomatshini oqhelekileyo we-post-sintering. Le mpumelelo ekwenzeni iimilo ezintsonkothileyo ngaphandle komatshini obanzi iguqula inkqubo yokwenziwa kweVVT.

Ukunciphisa Ubunzima ngelixa Ugcina Amandla

Igalelo elibalulekileyo le-PM ilele ekunciphiseni ubunzima becandelo. I-Aluminiyam i-sprockets kunye ne-rotors kwii-automotive cam phasers zilinganisa i-450 grams, into enkulu njengoko ithetha ukuba isiqingatha sobunzima be-900-gram sintered iron counterparts. Ubunzima obuncitshisiweyo buphucula ukusebenza kakuhle kwamafutha kunye nokunciphisa ukukhutshwa. Ubuchwephesha obuphezulu be-PM budibanisa iimpawu ezilula ngelixa zigcina ingqibelelo yesakhiwo-ibalulekile kwizicelo ze-VVT ezinoxinzelelo oluphezulu.

UPhuculo lwe-Friction Coefficient

Itekhnoloji ye-PM ibonelela ngolawulo oluchanekileyo kwiimpawu zokukhuhlana. Unyango olukhethekileyo lomphezulu olufana ne-manganese phosphating kunye neengubo zokwaleka ze-DLC zinceda amacandelo e-PM afezekise i-coefficients ephantsi yokukhuhlana. Ukuphumelela kwe-injini kuyaphucuka njengoko amacandelo e-PM e-triboconditioned anciphisa ukusetyenziswa kwamafutha nge-1%. Idityaniswe namafutha e-viscosity ephantsi, la macandelo ahambisa ukugcinwa kwepetroli phakathi kwe-2-4%.

Uveliso oluSebenzayo ngeXabiso

Imveliso ye-PM inikezela ngeenzuzo ezinyanzelekileyo kwezoqoqosho. Inkqubo isebenzisa ngaphezulu kwe-98% yezinto zokufakelwa kunye nenkunkuma encinci. Itekhnoloji ye-PM ifuna amandla angaphantsi kunesiqhelo sokusakha kunye nokubunjwa, okuzisa zombini inzuzo yokusingqongileyo kunye neendleko. Ikhono le-PM lokuvelisa iindawo ezinzima kunye nokuhambelana okuphezulu kwe-dimensional kwenza kube sisisombululo sezoqoqosho kakhulu kwimveliso yobuninzi yamacandelo e-VVT.

Ukuqukumbela

Iziphumo zovavanyo kunye nocazululo lubonisa ukuba kutheni i-powder metallurgy components ziligazi leenkqubo zale mihla zevalvu eziguquguqukayo. La malungu asebenza bhetele kuneendlela ezizezinye zesintu kwaye azuze umlinganiselo ochukumisayo wamandla wokudinwa wama-340 MPa - uphuculo lwama-54% kwiindlela zokuvelisa eziqhelekileyo.

Iziphumo zipeyinta umfanekiso ocacileyo. Amacandelo e-PM anobomi obude, agcina ukunyamezela okuchanekileyo, kwaye asebenze kakuhle kumaqondo okushisa aphezulu ukusuka -40 ° C ukuya kwi-150 ° C. Ukucuthwa kwabo ubunzima be-50% ngelixa begcina imfezeko yesakhiwo kubenza babaluleke kakhulu kubenzi beemoto abagxile ekusebenzeni kakuhle kwamafutha kunye nokunciphisa ukukhutshwa.

Iinzuzo zemveliso nazo zibalasele. Iinkqubo ze-PM zisebenzisa i-98% yemathiriyeli yokufaka kwaye zidale inkunkuma encinci kunemveliso yemveli. Iimpawu eziphezulu zokusebenza kunye neli nqanaba lokusebenza kakuhle kwenza i-powder metallurgy iphumelele ngokucacileyo kwimveliso yecandelo le-VVT.

Iziphumo zethu zovavanyo zika-2025 zibonisa ukubaAmacandelo e-PM iya kuhlala ibubomi beenkqubo eziphambili zokubala ixesha le-injini. Bazisa ukuchaneka, ukuqina, kunye nokusebenza kakuhle okufunwa bubunjineli beemoto zale mihla.

Ii-FAQs

Q1. Zeziphi iingenelo eziphambili zomgubo wesinyithi (PM) amalungu kwiinkqubo zevalvu eziguquguqukayo? 

Amacandelo e-PM anika amandla aphezulu okukhathala (i-340 MPa vs 220 MPa kwiindawo zendabuko), ukuchaneka okungcono kwe-dimensional, ukuphuculwa kokumelana nokunxiba, kunye nokusebenza okuphuculweyo kumaqondo okushisa aphezulu (-40 ° C ukuya kwi-150 ° C). Bakwavumela iijometri ezintsonkothileyo kunye nokunciphisa ubunzima ngelixa ugcina amandla.

Q2. Ngaba itekhnoloji ye-valve eguqukayo (VVT) iphucula njani ukusebenza kwenjini? 

Iisistim ze-VVT ziphucula ukusebenza kwevalvu kuzo zonke iimeko ze-injini ezahlukeneyo, okukhokelela ekuphuculweni kokusebenza kwamafutha (ukuya kuthi ga kwi-15% yokunciphisa ngexesha lokungalali), ukusebenza okuphuculweyo, kunye nokunciphisa ukukhutshwa. Bavumela ii-injini ukuba ziqhelane nezantya ezahlukeneyo kunye nemithwalo esebenzayo ngakumbi kuneenkqubo zexesha ezimiselweyo.

Q3. Zeziphi iintlobo ezahlukeneyo zenkqubo yevalvu eguquguqukayo esetyenziswa kwiinjini zanamhlanje? 

Kukho iintlobo ezintathu eziphambili zeenkqubo ze-VVT: iinkqubo ze-cam phasing ezilungelelanisa ixesha le-valve, iinkqubo zokulawula i-valve eziguqula ukunyuswa kwe-valve, kunye neenkqubo eziguquguqukayo eziqhubekayo ezinokuthi zilungelelanise iiparitha ezininzi ezibandakanya ixesha, ubude kunye nokunyusa.

Q4. Ingaba inkqubo yokwenziwa kwezixhobo ze-PM yahluke njani kwiindlela zemveli? 

Imveliso ye-PM ibandakanya ukukhetha ngocoselelo komgubo, ukudibanisa okuchanekileyo, kunye ne-sintering elawulwayo ukwenza iindawo ezinzima ezinomatshini omncinci. Le nkqubo ivumela imveliso ekufutshane ne-net-shape, inciphisa inkunkuma, kwaye yenza ukuba kuqulunqwe amacandelo aneempawu eziphathekayo ezilungiselelwe izicelo ze-VVT.

Q5. Ithini indleko yeendleko zokusebenzisa amacandelo e-PM kwiisistim zevalvu eziguquguqukayo? 

Nangona iindleko zokuqala zinokuba phezulu, amacandelo e-PM abonelela ngeenzuzo zeendleko zexesha elide ngenxa yokuqina kwazo okuphezulu, ukunciphisa imfuno yokutshintshwa, kunye nokuphucula ukusebenza kakuhle kwamafutha. Inkqubo yokwenziwa kwemveliso ikwanoqoqosho ngakumbi kwisikali, isebenzisa ngaphezulu kwe-98% yemathiriyeli yokufaka kwaye ifuna amandla amancinci xa kuthelekiswa neendlela zokusakha kunye neendlela zokubumba.