Manufar tsarin CVVT a cikin injin

Dokokin muhalli na zamani sun tilasta wa masana'antun mota haɓaka injunan injuna, inganta ingancinsu da rage fitar da abubuwa masu cutarwa a cikin iskar gas. Masu ƙira suna koyon sarrafa hanyoyin da aka karɓa a baya tare da matsakaitan sigogin ciniki. Ɗayan irin wannan ci gaban shine tsarin Variable Valve Timeing (CVVT).

Tsarin tsarin CVVT

CVVT (Ci gaba da Canjin Valve Timeing) wani tsari ne mai ci gaba da canjin lokaci mai canzawa wanda ke ba ka damar cika silinda da inganci da inganci. Ana samun wannan ta hanyar bambanta lokutan buɗewa da rufewar bawul ɗin sha.

Tsarin ya ƙunshi da'ira mai amfani da ruwa wanda ya ƙunshi:

• Sarrafa solenoid bawul;
• bawul tace;
• Kayan tuƙi shine kama na hydraulic.

Ana shigar da duk abubuwan da ke cikin tsarin a cikin injin Silinda. Ya kamata a tsaftace tace ko maye gurbin lokaci-lokaci.

CVVT na'ura mai aiki da karfin ruwa clutches za a iya shigar a kan duka biyu ci da kuma biyu shafts na ciki konewa engine.

Idan an shigar da masu canjin lokaci a kan shaye-shaye da camshafts, wannan tsarin lokacin bawul ɗin za a kira shi DVVT (Dual Variable Valve Timeing).

Ƙarin abubuwan haɗin tsarin kuma sun haɗa da firikwensin:

• Matsayi da saurin crankshaft;
• Matsayin Camshaft.

Waɗannan abubuwan suna aika sigina zuwa injin ECU (naúrar sarrafawa). Ƙarshen yana aiwatar da bayanin kuma yana aika sigina zuwa bawul ɗin solenoid, wanda ke daidaita samar da mai zuwa kama CVVT.

CVVT clutch na'urar

Clutch na hydraulic (mai sauya lokaci) yana da alamar alama a jiki. Ana sarrafa shi ta hanyar bel na lokaci ko sarka. An haɗa camshaft da kyar da na'ura mai juyi mai haɗa ruwa. Dakunan mai suna tsakanin na'ura mai juyi da gidan clutch. Saboda matsin man da famfon mai ke haifarwa, rotor da crankcase na iya motsawa dangane da juna.

Rikicin ya ƙunshi:

• na'ura mai juyi
• stator;
• tasha pin.

Ana buƙatar fil ɗin kulle don aiki na masu sauya lokaci a yanayin gaggawa. Misali, lokacin da man fetur ya ragu. Yana zamewa gaba yana ƙyale gidaje na clutch na hydraulic da rotor su kulle cikin matsayi na tsakiya.

VVT iko solenoid bawul aiki

Ana amfani da wannan hanyar don daidaita samar da man fetur don jinkirtawa da ci gaba da buɗewa na bawuloli. Na'urar ta ƙunshi abubuwa masu zuwa:

• Toshe;
• mai haɗawa;
• Bazara;
• Gidaje;
• Bawul;
• Budewa don samarwa, samarwa da magudanar mai;
• Tuddan

Na'urar kula da injin tana ba da sigina, bayan haka na'urar lantarki ta motsa spool ta cikin plunger. Wannan yana ba da damar mai ya gudana ta hanyoyi daban-daban.

Yadda tsarin CVVT ke aiki

Ka'idar aiki na tsarin shine canza matsayi na camshafts dangane da crankshaft pulley.

Tsarin yana da bangarori biyu na aiki:

• bawul bude gaba;
• Bawul na buɗe jinkiri.

Ci gaba

Fashin mai a lokacin aiki na injin konewa na ciki yana haifar da matsa lamba wanda aka yi amfani da bawul ɗin solenoid na CVVT. ECU tana amfani da yanayin juzu'in bugun jini (PWM) don sarrafa matsayin bawul ɗin VVT. Lokacin da ake buƙatar saita mai kunnawa zuwa matsakaicin kusurwar gaba, bawul ɗin yana motsawa kuma ya buɗe hanyar mai zuwa ɗakin gaba na CVVT hydraulic clutch. A wannan yanayin, ruwa ya fara farawa daga ɗakin lag. Wannan ya sa ya yiwu a motsa rotor tare da camshaft dangane da gidaje a cikin shugabanci sabanin juyawa na crankshaft.

Misali, kusurwar kama CVVT a rago shine digiri 8. Kuma tun da kusurwar buɗaɗɗen bawul na injin konewa na ciki shine digiri 5, a zahiri yana buɗe 13.

Lag

Ka'idar ta yi kama da abin da aka bayyana a sama, duk da haka, bawul ɗin solenoid, a matsakaicin jinkiri, yana buɗe tashar mai da ke kaiwa ga ɗakin jinkiri. . A wannan lokaci, CVVT na'ura mai ba da hanya tsakanin hanyoyin sadarwa yana motsawa a cikin hanyar juyawa na crankshaft.

CVVT dabaru

Tsarin CVVT yana aiki a ko'ina cikin kewayon saurin injin. Dangane da masana'anta, dabarun aikin na iya bambanta, amma a matsakaici yana kama da haka:

• Idling. Ayyukan tsarin shine a jujjuya magudanar abinci don buɗe bawul ɗin ci gaba daga baya. Wannan matsayi yana ƙara kwanciyar hankali na injin.
• Matsakaicin saurin injin. Tsarin yana haifar da matsakaicin matsayi na camshaft, wanda ya rage yawan man fetur da kuma fitar da abubuwa masu cutarwa tare da iskar gas.
• Babban saurin injin. Tsarin yana aiki don samar da matsakaicin ƙarfi. Don yin wannan, ramin ci yana juyawa don ba da damar bawuloli su buɗe da wuri. Don haka, tsarin yana samar da mafi kyawun cika silinda, wanda ke inganta aikin injin konewa na ciki.

Yadda za a kula da tsarin

Tun da akwai tacewa a cikin tsarin, ana bada shawara don maye gurbin shi lokaci-lokaci. Wannan shi ne matsakaicin kilomita 30. Hakanan zaka iya tsaftace tsohuwar tacewa. Masu sha'awar mota na iya ɗaukar wannan hanya da kansu. Babban wahala a cikin wannan yanayin shine gano matatar kanta. Yawancin masu zanen kaya sun sanya shi a cikin layin mai daga famfo zuwa bawul ɗin solenoid. Bayan an tarwatsa tacewar CVVT kuma an tsaftace ta sosai, yakamata a duba ta. Babban yanayin shine amincin grid da jiki.

Ya kamata a tuna cewa tace yana da rauni sosai.

Ba tare da shakka ba, tsarin CVVT yana nufin inganta aikin injin a duk yanayin aiki. Saboda kasancewar tsarin ci gaba da jinkirta buɗaɗɗen bawul ɗin ci, injin ya fi tattalin arziki kuma yana rage fitar da abubuwa masu cutarwa. Hakanan yana ba ku damar rage saurin aiki ba tare da lalata kwanciyar hankali ba. Saboda haka, wannan tsarin yana amfani da duk manyan masana'antun mota ba tare da togiya ba.