PCV vharafu kana kuti crankcase ventilation inoshanda sei mumotokari

Hazvibviri kubvisa zvachose mukaha pakati pepiston uye silinda mune injini inopisa yemukati nekuda kwekusiyana kwavo kwekuwedzera kwekupisa. Iko kunogara kune njodzi yekuroora, saka, iyo inopisa yekudzokera shure kwepiston inosanganiswa mukugadzira, uye depressurization inobhadharwa ne elastic split piston mhete. Asi kunyange ivo havapi zana kubva muzana chisimbiso pamagasi pasi pekumanikidzwa.

Zvichakadaro, crankcase inenge iine hermetic, saka kuwedzera kwekumanikidzwa mairi hakudzivisiki, uye sezvaunoziva, chiitiko ichi hachidiwe zvakanyanya.

Sei mota dzichida crankcase ventilation?

Kupfuura nepakati pemigero pakati pezvindori uye grooves yavo mumapistoni, uye kuburikidza nekucheka kwavo, magasi emhepo, anosanganisira epoust particles, mafuta asina kupiswa uye zviri mukati memhepo, zvishoma zvinowira pasi pepiston mu crankcase injini.

Pamusoro pazvo, panogara paine mhute yeoiri mune inosimba yakaenzana, iyo inokonzeresa kudzosa kwezvikamu nekuputika. Kusanganiswa kwe soot nemamwe ma hydrocarbon nemafuta kunotanga, ndosaka iyo yekupedzisira zvishoma nezvishoma ichikundikana.

Iyo nzira inoitika nguva dzose, mhedzisiro yayo inoverengerwa mukuvandudza uye kushanda kweinjini.

Oiri inoshandurwa nguva dzose, uye zvinowedzera zviripo mairi zvinobudirira kuchengetedza uye kunyungudutsa zvigadzirwa zvisingadiwi kusvikira zvagadzirwa. Asi pasina kutora mamwe matanho mumainjini, kunyanya ayo akamboshanda kwenguva yakareba, akasakara zvishoma uye anopfuudza huwandu hwakakosha hwemagasi kuburikidza neboka repiston, mafuta anokundikana nekukurumidza.

Uye zvakare, kudzvinyirirwa kuchakwira zvakanyanya mu crankcase, iyo inotakurawo hunhu hwekupuruzira. Zvisimbiso zvakawanda, kunyanya iyo stuffing bhokisi rudzi, haingamiri izvi. Kushandiswa kwemafuta kuchawedzera, uye injini inokurumidza kusviba kunze uye kutyora kunyange zvakapfava zvakatipoteredza zvinodiwa.

Nzira yekubuda ichave crankcase ventilation. Muchimiro chayo chakareruka, ikufema nelabyrinth yeoiri diki, uko magasi anoburitswa zvishoma kubva mumhute yeoiri, mushure mezvo anoburitswa nekumanikidza kwecrankcase mumhepo. Iyo sisitimu ndeyechinyakare, haina kukodzera injini dzemazuva ano.

Kukanganisa kwayo kunoratidza:

• kudzvinyirirwa mukrankcase kunochengetwa pamwe chete nekuputika, kunyange zvazvo zvakanyanya kuderedzwa nekuda kwekusunungurwa kwemagasi kuburikidza nekufema;
• zvakaoma kuronga kudzora kwecrankcase gasi kuyerera;
• iyo sisitimu haigone kushanda zvinobudirira muhuwandu hwese hwekuchinja uye mitoro;
• kusunungurwa kwemagasi mumhepo hakugamuchirwi nokuda kwezvikonzero zvezvakatipoteredza.

VKG system Audi A6 C5 (Passat B5) 50 km mushure mekuchenesa, kutarisa membrane muVKG valve.

Kufefetedza kuchashanda zvirinani, uko gasi rinotorwa nechisimba, nekuda kwekushaikwa muhuwandu hwekutora.

Panguva imwecheteyo, magasi pachawo anopinda mumasilinda, uko zviri nyore kuronga kupisa kwavo nekubuda kushoma mumhepo. Asi kunyange sangano rakadaro harina kukwana nekuda kwekusagadzikana kwekumanikidzwa munzvimbo ye throttle.

Chinangwa chePCV valve

Pachisina basa uye panguva yeinjini braking (kumanikidzwa idling nekuwedzera kumhanya), iyo vacuum mune yakawanda yekudyara ndiyo yakanyanya. Mapistoni anowanzo kukwevera mumhepo kubva mumutsara nesefa, uye damper haibvumiri.

Kana iwe ukangobatanidza nzvimbo iyi nepombi kune crankcase, ipapo kuyerera kwemagasi kubva ipapo kuchapfuura miganhu yese inonzwisisika, uye kuparadzanisa mafuta kubva gasi muhuwandu hwakadaro kuchava basa rakaoma.

Izvo zvakapesana nemamiriro ezvinhu zvichaitika pakazara throttle, semuenzaniso, mukukurumidza kukurumidza kana rated simba. Kuyerera kwemagasi mukati me crankcase ndiko kwakanyanya, uye kudonha kwekumanikidza kunoderedzwa, kunotemerwa chete negasi-simba rekudzivirira kwemhepo sefa. Kufefetedza kunorasa kushanda kwayo chaiko painodiwa zvakanyanya.

Zvese zvinodiwa zvinogona kugadziriswa uchishandisa yakakosha mudziyo - crankcase ventilation valve, inozivikanwa neakasiyana mapfupiso, kazhinji PCV (fungus).

Iyo inokwanisa kugadzirisa kuyerera kwemagasi mune dzakasiyana modhi, pamwe nekudzivirira backflows kubva kune akawanda kupinda mu crankcase.

Chishandiso uye nheyo yekushanda kweVKG valve

Ivhavha inogona kurongwa nenzira dzakasiyana-siyana, uchishandisa chitubu-yakatakura pistons (plungers) kana flexible diaphragms (membranes) sechinhu chinoshanda. Asi iyo general nheyo yekushanda kwemidziyo yese yakafanana.

Ivhavha ine hukama hwakasiyana pakati pekugona kwayo uye kudonha kwekumanikidza.

1. Kana iyo throttle yakavharwa zvakakwana, iyo vacuum yakanyanya. Iyo PCV valve inopindura nekuvhura diki diki, iyo inoita kuti gasi diki rifambe nepakati payo. Pausina basa, hapana chimwe chinodiwa. Panguva imwecheteyo, muparadzi wemafuta weventilation system anobudirira kubata nemabasa ayo, mafuta haapindi muunganidzi, uye hapana kushandiswa kwemarara.
2. Mumamiriro epakati ekuremerwa ane chikamu chakavhurika throttle, iyo vacuum inodonha, uye kushanda kwevharuvhu kuchawedzera. Iyo crankcase gasi kushandiswa kunowedzera.
3. Pasimba rakakura uye nekumhanya kwakanyanya, iyo vacuum ishoma, sezvo pasina kupindirana nemhepo iri kuuya. Iyo yeventilation system inofanirwa kuratidza kugona kwayo kusvika pakakwirira, uye vheji inovimbisa izvi nekuvhura zvachose uye kwete kupindira nekuburitswa kwemagasi kunze kwekuvhurika throttle.
4. Kudzokera kumashure kunogona kuitika mune akawanda, ayo ane njodzi kune anopfuta-magasi. Asi vharuvhu haitenderi moto kuti upinde mukati memhepo, nekukasira uchirova nekuda kwekudonha kwekudzvinyirira.

Panguva imwecheteyo, dhizaini yevharuvhu iri nyore kwazvo uye haina chinhu kunze kwechitubu uye inodzika nemaplungers kana membrane mune yepurasitiki kesi.

Zviratidzo zvePCV yakanamatira

Muchiitiko chekukundikana, valve inogona jam mune chero nzvimbo, mushure mokunge injini haizokwanisi kushanda zvakanaka mune mamwe maitiro ose.

Nayo pachayo, kufefetera hakuzokanganise kushanda kwacho, kuchakanganisa matambudziko enguva refu, kupfeka mafuta uye kupeperetswa zvisimbiso zvecrankcase. Asi mhepo inopfuura nepakati peventilation system, uye nekudaro kuburikidza nevhavha, yatove yakaverengerwa muzvigadziro zveinjini manejimendi system. Saka matambudziko nekuumbwa kwemusanganiswa, uye mune mamwe maitiro.

Musanganiswa unogona kuve wakafumiswa kana vharuvhu ichigara yakavharwa, kana kupera kana yakanamira panzvimbo yakashama. Pamusanganiswa wakaonda, injini inotanga kuipa uye haipe simba rinowanzoitwa.

Kupfuma kunokonzeresa matambudziko nekushandiswa kwemafuta uye madhipoziti pazvikamu zveinjini. Zvinokwanisika kuti chirongwa chekuzviongorora chinogona kukonzerwa nekuonekwa kwekukanganisa mukuumbwa kwemusanganiswa uye kushanda kwemaokisijeni sensors.

Maitiro ekutarisa PKV valve

Nzira iri nyore yekutarisa vharafu ndeyekuitsiva neyakanaka inozivikanwa. Asi mukati mekushanda pakuongorora injini ine scanner yakabatana, inogona kukurumidza kuongorora mamiriro ayo nekushandura nzvimbo yeisingaite inomhanyisa controller stepper mota.

Panofanira kuva nemusiyano weanenge 10% pakati pemaitiro ekufema, i.e. pasina vharafu, ine vharafu mumugero wegasi, uye yakavhara zvachose mhepo yekufema.

Kureva kuti, vharafu rinowanzo shanda rinopatsanura mweya usina basa nepakati, ichipa avhareji yekuyerera pakati peyakavharika uye yakavhurika kufema.

Kugadziriswa kweVKG system Audi A6 C5 yekugadziridza zvakare

Kushandira crankcase ventilation valve

Kuwedzera hupenyu kuchabatsira kuchenesa nguva nenguva, izvo zvinogona kuitwa pane yega yega yechitatu shanduko yemafuta. Ivhavha inobviswa uye yakashambidzwa zvakakwana kumativi ose neaerosol carburetor cleaner.

Kupera kwemaitiro ekutsvaira kuchava kuburitswa kwemvura yakachena kubva paimba. Mushure mekuvhiyiwa, vharafu inofanira kuongororwa sezvo inogona kunge yatokuvadzwa, uye kutsvaira kunobvisa chisimbiso chekuvhara.