Chinangwa cheCVVT system mujini

Mitemo yemazuva ano yezvakatipoteredza inosungira vagadziri vemotokari kugadzira injini dziri nani, kuvandudza kushanda kwadzo uye kuderedza kubudiswa kwezvinhu zvinokuvadza mumagasi emhepo. Vagadziri vanodzidza kudzora maitiro akagamuchirwa kare neavhareji yekutengesa-off paramita. Imwe budiriro yakadaro ndeye Variable Valve Timing (CVVT) system.

CVVT system dhizaini

CVVT (Inoenderera mberi Variable Valve Nguva) inoramba ichichinja vharafu nguva system iyo inokutendera iwe kunyatso kuzadza masilinda nechaji nyowani. Izvi zvinowanikwa nekusiyanisa nguva dzekuvhura nekuvhara kwevhavha yekutora.

Iyo sisitimu inosanganisira hydraulic circuit inosanganisira:

• Kudzora solenoid valve;
• valve sefa;
• Iyo drive ndeye hydraulic clutch.

Zvese zvikamu zveiyo system zvakaiswa muinjini cylinder musoro. Sefa inofanira kucheneswa kana kutsiviwa nguva nenguva.

CVVT hydraulic couplings inogona kuiswa pane zvese zvekutora uye ese mashaft einjini yekupisa yemukati.

Kana zvikamu zvekuchinja zvakaiswa pane inopinza uye exhaust camshafts, iyi valve timing system ichanzi DVVT (Dual Variable Valve Timing).

Mamwe masystem system anosanganisirawo masensa:

• Nzvimbo uye kumhanya kwe crankshaft;
• Camshaft nzvimbo.

Zvinhu izvi zvinotumira chiratidzo kune injini ECU (control unit). Iyo yekupedzisira inobata ruzivo uye inotumira chiratidzo kune solenoid valve, iyo inodzora mafuta ekupa kuCVVT clutch.

CVVT clutch mudziyo

Iyo hydraulic clutch (phase shifter) ine asterisk pamuviri. Inofambiswa nebhandi renguva kana cheni. Iyo camshaft yakanyatsobatanidzwa kune fluid coupling rotor. Iwo makamuri emafuta ari pakati pe rotor uye clutch housing. Nekuda kwekumanikidzwa kwemafuta kunogadzirwa nepombi yemafuta, rotor uye crankcase inogona kufamba yakabatana kune imwe neimwe.

Iyo clutch inosanganisira:

• rotor;
• stator;
• stop pini.

Pini yekuvhara inodiwa pakushanda kwevashanduri vechikamu mune emergency mode. Somuenzaniso, apo mafuta anodzvinyirira anodonha. Inotsvedza kumberi ichibvumira iyo hydraulic clutch imba uye rotor kukiya munzvimbo yepakati.

VVT inodzora solenoid valve kushanda

Iyi nzira inoshandiswa kugadzirisa mafuta ekupa kunonotsa uye kufambisira mberi kuvhurwa kwemavharuvhu. Chigadzirwa chacho chine zvinhu zvinotevera:

• Plunger;
• connector;
• Chitubu;
• Dzimba;
• Valve;
• Kuvhura kwekupa, kupa uye kudonhedza mafuta;
• Ichitenderera.

Iyo injini yekudzora unit inoburitsa chiratidzo, mushure meiyo electromagnet inofambisa spool kuburikidza neplunger. Izvi zvinoita kuti mafuta afambe nenzira dzakasiyana.

Iyo CVVT system inoshanda sei

Nheyo yekushanda kweiyo system ndeyekuchinja chinzvimbo checamshafts maererano ne crankshaft pulley.

Iyo system ine nzvimbo mbiri dzebasa:

• vharafu kuvhura mberi;
• Kunonoka kuvhura valve.

Mberi

Iyo pombi yemafuta panguva yekushanda kweinjini yekupisa mukati inogadzira kumanikidza kunoshandiswa kune CVVT solenoid valve. Iyo ECU inoshandisa pulse wide modulation (PWM) kudzora chinzvimbo cheVVT vharafu. Kana iyo actuator ichida kuiswa kune yakanyanya kumberi angle, vharuvhu inofamba uye inovhura nzira yemafuta mukamuri yepamberi yeCVVT hydraulic clutch. Muchiitiko ichi, mvura inotanga kubuda kubva mukamuri relag. Izvi zvinoita kuti zvikwanise kufambisa rotor necamshaft inoenderana nedzimba munzira yakatarisana nekutenderera kwe crankshaft.

Semuenzaniso, iyo CVVT clutch angle pausina basa ndeye 8 madhigirii. Uye sezvo iyo mechanic valve yekuvhura angle yeinjini yekupisa yemukati iri madhigirii mashanu, inovhura 5.

Lag

Nheyo yacho yakafanana neyakatsanangurwa pamusoro apa, zvisinei, iyo solenoid valve, pakunonoka kunonoka, inovhura nzira yemafuta inoenda kukamuri yekunonoka. . Panguva ino, CVVT rotor inofamba ichienda kune kutenderera kwe crankshaft.

CVVT pfungwa

Iyo CVVT system inoshanda mukati mese injini yekumhanyisa renji. Zvichienderana nemugadziri, pfungwa yebasa inogona kusiyana, asi paavhareji inotaridzika seizvi:

• Idling. Basa rehurongwa nderekutenderedza shaft yekupinda kuitira kuti mavharuvhu ekutora avhure gare gare. Ichi chinzvimbo chinowedzera kugadzikana kweinjini.
• Avhareji yekumhanya kweinjini. Iyo sisitimu inogadzira nzvimbo yepakati yecamshaft, iyo inoderedza kushandiswa kwemafuta uye kuburitswa kwezvinhu zvinokuvadza nemagasi emhepo.
• High injini kumhanya. Iyo sisitimu iri kushanda kuti igadzire simba guru. Kuti uite izvi, shaft yekupinda inotenderera kubvumira mavharuvhu kuvhura kare. Nokudaro, iyo system inopa kuzadza zviri nani kwemasilinda, iyo inovandudza kushanda kwejini inopisa mukati.

Nzira yekuchengetedza hurongwa

Sezvo pane sefa muhurongwa, inokurudzirwa kuitsiva nguva nenguva. Iyi iavhareji yemakiromita makumi matatu ezviuru. Iwe unogona zvakare kuchenesa iyo yekare sefa. Anofarira mota anogona kubata maitiro aya ega. Dambudziko guru munyaya iyi richange riri kuwana sefa pachayo. Vazhinji vagadziri vanoiisa mumutsara wemafuta kubva papombi kuenda kune solenoid valve. Mushure mekunge CVVT sefa yabviswa uye yanyatsocheneswa, inofanirwa kuongororwa. Chimiro chikuru ndechekutendeseka kwegridi uye muviri.

Zvinofanira kuyeukwa kuti sefa haina kusimba.

Pasina kupokana, iyo CVVT system ine chinangwa chekuvandudza injini kushanda mune ese anoshanda modes. Nekuda kwekuvapo kwehurongwa hwekufambira mberi uye kunonoka kuvhurwa kwemavharuvhu ekutora, injini inowedzera hupfumi uye inoderedza kuburitswa kwezvinhu zvinokuvadza. Iyo zvakare inobvumidza iwe kudzikisa kusashanda kumhanya pasina kukanganisa kugadzikana. Naizvozvo, iyi sisitimu inoshandiswa nevagadziri vese vakuru vemotokari pasina kusarudzika.