Chii chinonzi VVTi uye kuti chinoshanda sei
Nyika yemotokari yakashongedzwa nemavara mapfupi uye mazwi asinganzwisisike anogona kushamisa pfungwa dzimwe nguva. Pakati peizvi, VVTi inomira setekinoroji yakakosha, kunyanya kune avo vanofarira kunzwisisa mashandiro einjini dzemazuva ano zviri nani. VVTi inomiririra Variable Valve Timing ine hungwaru, uye inomiririra kufambira mberi kwetekinoroji mukugadzira injini dzemoto dzinonyanya kutarisisa kusimudzira mashandiro, kushanda zvakanaka kwemafuta, uye kuderedza kusvibiswa kwemhepo. Yakaunzwa neToyota, VVTi yave chiratidzo chekuvandudzwa muinjiniya yemotokari. Chinyorwa chino chinangwa chekujekesa kuti VVTi chii, mashandiro ayo, uye mabhenefiti ayo kune ruzivo rwako rwekutyaira.
Nheyo dzeNguva yeValve
Pakati peinjini ipi neipi inopisa mukati memoto pane nzira yekupinza mafuta nemhepo musanganiswa uye kuburitsa gasi reutsi, zvichirongwa nekuvhurwa nekuvhara kwemavharuvhu. Kazhinji, mainjini ane nguva yakatarwa yemavharuvhu, zvichireva kuti mavharuvhu eutsi neeutsi anovhurwa nekuvharwa panguva dzakatarwa pasinei nemamiriro ekushanda kweinjini.
Mumasystem enguva yakatarwa yemavharuvhu, kubvumirana hakudzivisiki. Semuenzaniso, kugadzirisa mota kuti ishande zvakanaka kunowanzoita kuti ishande zvakanaka panomhanya zvishoma uye igare isina chinhu. Kusiyana neizvi, kugadzirisa injini kuti ishande zvakanaka neRPM shoma kunogona kudzikamisa mashandiro ayo epamusoro. Kuchinjana uku ndiko kunoshanda masisitimu eVariable Valve Timing (VVT), akadai seVVTi, zvichipa chiyero pakati pekushanda zvakanaka uye kushanda zvakanaka.
Chii chinonzi VVTi?
Variable Valve Timing ine hungwaru, kana kuti VVTi, imhando yeToyota yemhando ye variable valve timing tekinoroji. Inobvumira injini kugadzirisa nguva yekuvhurwa nekuvharwa kwemavharuvhu ekupinda uye dzimwe nguva ekubudisa mweya, panguva chaiyo, zvichienderana nekumhanya kweinjini, mutoro, uye mamwe mamiriro ekushanda.
Mashandiro eVVTi
Zvikamu zveVVTi
1. Camshaft: Mumainjini echinyakare, camshaft inotyaira kuvhurwa nekuvharwa kwemavharuvhu panguva dzakatarwa. Muhurongwa hweVVTi, camshaft ine michina yakakosha inogona kufambisa mberi kana kudzoreredza nzvimbo yayo.
2. ECU (Engine Control Unit): Uropi hweinjini, ECU inoongorora mamiriro einjini ichishandisa masensa akasiyana-siyana uye inogadzirisa nzvimbo yecamshaft zvinoenderana.
3. Valvu Yekudzora Oiri (OCV): OCV inodzora kuyerera kwekumanikidzwa kweoiri kuenda kuchinhu chakabatana necamshaft, iyo inozogadzirisa nguva yayo.
Uchishandisa Mechanism
Kushanda kweVVTi kunogona kunzwisiswa zvakanyanya kuburikidza nematanho anotevera:
1. Mamiriro Ekutarisa: ECU inogara ichigamuchira mashoko kubva kumasensa akasiyana-siyana, kusanganisira nzvimbo ye throttle, kumhanya kweinjini, mutoro weinjini, uye tembiricha.
2. Kusarudza: Zvichibva padata iri, ECU inoverenga nguva yakakodzera yevharuvhu yemamiriro aripo iye zvino.
3. Kushanda: ECU inotumira chiratidzo kuOil Control Valve, iyo inogadzirisa kumanikidzwa kweoiri kunotumirwa ku camshaft timing gear mechanism.
4. Kugadziriswa: Kumanikidzwa kwemafuta kunochinja kona ye camshaft, zvichifambisa kana kudzoreredza nzvimbo yayo kuti ichinje nguva yevharuvhu.
Nekugara uchigadzirisa nguva yevharuvhu, VVTi inoita kuti mavharuvhu ekupinda nekubuda kwemhepo avhurike uye avhare panzvimbo dzakaringana mupiston cycle, zvichienderana nemamiriro ekutyaira aripo iye zvino.
Mabhenefiti eVVTi
Enhanced Performance
Chimwe chezvakanakira zvikuru zveVVTi kugona kwayo kuwedzera mashandiro einjini. Kana injini iine mutoro wakawanda, senge panguva yekumhanyisa mota, sisitimu yeVVTi inogadzirisa nguva yevharuvhu kuti ibvumire musanganiswa wemhepo-mafuta kupinda mukamuri rekupisa, nokudaro ichiwedzera simba rinobuda.
Kuvandudza Kushanda Kwemafuta
Kushanda zvakanaka kwemafuta ndeimwe mukana mukuru. Nekugadzirisa nguva yemavharuvhu, VVTi inoderedza kupinda kwemafuta ne exhaust paRPM dzakaderera, zvichiwedzera kushanda zvakanaka kwemafuta emoto uye zvichideredza kudyiwa kwemafuta. Kugadzirisa uku kunobatsira zvikuru panguva yekutyaira muguta, uko mainjini anowanzo shanda pasi pesimba rawo repamusoro.
Yakaderedzwa Emissions
Kudzora kwakasimba nguva yemavharuvhu kunobatsirawo mukuderedza kusvibiswa kwemhepo. Kushanda zvakanaka kwekupisa kunoita kuti pave nekubuda kwemahydrocarbon mashoma asina kupiswa. Pamusoro pezvo, nekushandisa nguva yakakwana yekuvharwa kwemavharuvhu emhepo, sisitimu inoita kuti magasi akawanda asara abudiswe, zvichideredza kusvibiswa kwemhepo.
Kusaita Basa Uye Kupindura Zvakanaka
VVTi inobatsira kuti injini ishande zvakanaka nekugadzirisa nguva yevharuvhu kuti ishande zvakanaka uye ikurumidze kushanda. Izvi hazvingobatsiri chete kutyaira asi zvinoderedzawo kupera simba kwezvikamu zveinjini.
Mhando uye Kushanduka kweVVTi
VVTi imwe chete
Pakutanga, VVTi yaingoshandiswa chete pa intake camshaft, ichinyanya kutarisa pakuvandudza mashandiro emafuta uye torque yakaderera.
Dual VVTi
Nekuvandudzwa, Toyota yakaunza Dual VVTi, uko macamshaft ekupinda neokubuda nawo anobatsirwa nekuchinja nguva. Kuchinja uku kunoita kuti injini ikwanise kushanda zvakanaka uye inomhanya zvakasiyana-siyana.
VVTi-E neVVTi-L
Mamwe maitirwo anosanganisira VVTi-E (Variable Valve Timing ine Electronic control) uye VVTi-L (Variable Valve Timing ine Lift control). VVTi-E inobatanidza electronic control pamusoro pesystem, zvichiita kuti zvigadziriswe zvakanyatsojeka. VVTi-L, kune rumwe rutivi, inobatanidza variable valve timing ne variable valve lift, ichipa imwe divi rekutonga kwekushanda uye kushanda zvakanaka.
mhedziso
Munyaya yeinjiniya yemotokari, VVTi inomira senzira itsva inoshamisa inoenzanisa mashandiro, kushanda zvakanaka kwemafuta, uye kudzora utsi hunobuda. Nekugadzirisa nehungwaru nguva yemavharuvhu nguva nenguva, VVTi inobvumira vatyairi kuti vaone zvakanakisa zvenyika mbiri idzi—injini ine simba isingakanganisi kuchengetedza mafuta kana mutoro wezvakatipoteredza.
Kubva payakatanga senzira ye single-camshaft kusvika pakushanduka kwayo kuita Dual VVTi, VVTi-E, uye VVTi-L, tekinoroji iyi inoramba ichisimudzira miganhu yezvinogona kuitwa nemainjini ekupisa mukati. Ungave uchida mota uchida simba rakawanda kana kuti uri munhu anofamba nemotokari ari kutsvaga mafuta ari nani, VVTi inoita kuti ruzivo rwekutyaira rwuvepo nguva dzose. Remangwana rinotaridzika rakajeka sezvo zvinhu zvitsva zvakaita seVVTi zvichiramba zvichichinja, zvichiwedzera kushanda pamwe chete pakati pevanhu nemuchina.
