Mhepo Misa Meter - Misa Mhepo Kuyerera uye Intake Manifold Pressure Sensor MAP
Zviri mukati
Vanopfuura mutyairi mumwe, kunyanya muchiitiko cheiyo inozivikanwa 1,9 TDi, akanzwa zita rekuti "mass air flow mita" kana inowanzozivikanwa inonzi "mweya uremu". Chikonzero chacho chaive nyore. Kazhinji kazhinji, chinhu chakakundikana uye chakatungamira, pamusoro pechiedza chinopisa cheinjini, kudonha kwakakosha kwesimba kana izvo zvinonzi kudzipwa kweinjini. Chinhu ichocho chaidhura chaizvo mumazuva ekutanga enguva yeTDI, asi nerombo rakanaka rave rakachipa zvakanyanya nekufamba kwenguva. Pamusoro peiyo dhizaini dhizaini, isina hanya yekutsiva firita yemhepo "yakabatsira" kuti ipfupikise hupenyu hwayo. Kuramba kwemamita kwakavandudza zvakanyanya nekufamba kwenguva, asi kunogona kukundikana nguva nenguva. Ehezve, chikamu ichi chiripo kwete muTDI chete, asiwo mune mamwe diziri uye epeturu injini dzemazuva ano.
Kuwanda kwemweya unoyerera kunoonekwa nekutonhodza kupisa-kunoenderana nemhepo (inopisa waya kana firimu) yeiyo sensor nemhepo inoyerera. Iko kushomeka kwemagetsi kweiyo sensor inoshanduka uye yazvino kana yemagetsi chiratidzo inoongororwa neyakadzora unit. Iyo mhepo yemamita mita (anemometer) inoyera zvakananga huwandu hwehuwandu hwemhepo inopihwa injini, i.e. kuti kuyerwa kwakazvimiririra nekuwanda kwemhepo (zvinopesana nekuyera kwehuwandu), zvinoenderana nekumanikidza uye kudziya kwemhepo (kukwirira). Sezvo chiyero chemafuta-emhepo chakatsanangurwa seyero resisi, semuenzaniso 1 kg yemafuta pa14,7 kg yemhepo (stoichiometric ratio), kuyera huwandu hwemhepo ine anemometer ndiyo nzira chaiyo yekuyera.
Zvakanakira kuyera huwandu hwemhepo
- Kutsanangurwa kwakaringana kwehuwandu hwemhepo yakawanda.
- Kupindura nekukurumidza kwemameter ekuyerera kuchinjika mukuyerera.
- Hapana zvikanganiso zvinokonzerwa neshanduko yemhepo kumanikidza.
- Hapana zvikanganiso zvinokonzerwa neshanduko mukutora mweya tembiricha.
- Kuisirwa nyore kwemhepo inoyerera mita isina zvikamu zvinofamba.
- Yakadzika kwazvo hydraulic kuramba.
Kuyera kwemweya vhoriyamu netambo inopisa (LH-Motronic)
Mune iyi mhando yejekiseni repeturu, anemometer inosanganisirwa muchikamu chakajairika chekudya kwakasiyana siyana, iyo sensor iyo tambo yakatambanudzwa inopisa. Iyo waya inopisa inochengetwa pane tembiricha yenguva dzose nekupfuura magetsi emagetsi ari pamusoro pe100 ° C pakakwirira kupfuura tembiricha yemhepo yekudya. Kana mota ikadhonzera mumhepo yakawanda kana shoma, kudziya kwetambo kunochinja. Chizvarwa chekupisa chinofanirwa kubhadharwa nekuchinja iyo yekudziya zvazvino. Hukuru hwayo chipimo cheuwandu hwemweya unodhonzwa mukati. Chiyero chinoitika kanosvika ka1000 pasekondi. Kana iyo inopisa waya yadambura, iyo yuniti unit inopinda mune emergency mode.
Sezvo waya iri mumutsetse wekukweva, mari dzinogona kuumbika pawaya uye dzinokanganisa kuyerwa. Naizvozvo, pese pese painodzimwa injini, waya inodziyirwa zvishoma kusvika pa1000 ° C zvichibva pachiratidzo kubva kuchikamu chekutonga, uye inoisa pairi kutsva.
Platinamu inopisa waya ine dhayamita ye 0,7 mm inodzivirira iyo tambo mesh kubva kumakaniki kunetseka. Iyo waya inogona zvakare kuwanikwa mune yekudarika duct inotungamira kune yemukati duct. Kusvibiswa kwewaya inopisa kunodzivirirwa nekuifukidza negirazi girazi uye neiyo yakakwira mhepo velocity mune yekupfuura chiteshi. Kupisa kwetsvina hakuchina kudikanwa mune ino kesi.
Kuyera huwandu hwemhepo nefirimu inopisa
Iyo yekudzivirira sensor inoumbwa neyakaipisa conductive layer (firimu) inoiswa mune yekuwedzera yekuyera chiteshi yeiyo sensor dzimba. Iyo inopisa moto haina kukanganiswa nekusvibiswa. Mhepo yekudyira inopfuura nemumhepo inoyerera mita uye nekudaro inokanganisa tembiricha yeiyo inoitisa inopisa kupisa (firimu).
Iyo sensor ine matatu emagetsi anopikisa akaumbwa muzvikamu.
- kupisa kupisa RH (sensor kuramba),
- kuramba sensor RS, (tembiricha yekunzwa),
- kupisa kupisa RL (kunwa mweya tembiricha).
Matete akasimba epuratinamu anoiswa pane ceramic substrate uye akabatana nezambuko sevadzivisi.
Izvo zvemagetsi zvinodzora tembiricha yeanopisa anopikisa R nemhando dzakasiyana dzemagetsi.H kuitira kuti ive 160 ° C yakakwira kupfuura iyo yekudziya mweya tembiricha. Iyi tembiricha inoyerwa nekushora RL zvinoenderana netembiricha. Iyo tembiricha yeanodziya anopikisa inoyerwa neiyo yekudzivirira sensor RS... Sezvo kuyerera kwemweya kunowedzera kana kudzikira, kupisa kwekudziya kunotonhora zvakanyanya kana zvishoma. Izvo zvemagetsi zvinodzora iwo voltage yeanodziya anopikisa kuburikidza neiyo yekudzivirira sensor kuti iyo tembiricha mutsauko inosvika 160 ° C. Kubva pane ino yekudzora magetsi, iyo sensor yemagetsi inogadzira chiratidzo cheyuniti yuniti inoenderana nemhepo mashoma (mashoma kuyerera).
Muchiitiko chekusashanda kwemamita emhepo yemhepo, iyo yemagetsi control unit ichashandisa inotsiva kukosha kwekuvhura nguva yeinjection (emergency mode). Iyo inotsiva kukosha inotarirwa nenzvimbo (angle) yevhavhavhavha uye injini yekumhanyisa chiratidzo - iyo inonzi alpha-n control.
Volumetric mhepo inoyerera mita
Pamusoro peiyo yakawanda mhepo inoyerera sensor, iyo inonzi volumetric, tsananguro yadzo inogona kuonekwa mumufananidzo uri pazasi.
Kana injini iine MAP (manifold air pressure) sensor, iyo control system inoverenga vhoriyamu yemhepo data uchishandisa injini kumhanya, tembiricha yemhepo uye volumetric inoshanda data yakachengetwa muECU. Panyaya yeMAP, musimboti wekukoira wakavakirwa pahuwandu hwekumanikidza, kana kuti vacuum, mune yakawanda yekudyara, iyo inosiyana nekuremerwa kweinjini. Kana injini isiri kushanda, kudzvanywa kwakawanda kwakafanana nemhepo yakadzika. Shanduko inoitika injini ichimhanya. Injini pistons inonongedza kuzasi kwakafa centre inoyamwa mumhepo nemafuta uye nekudaro inogadzira vacuum mune yakawanda yekudyara. Iyo yakanyanya vacuum inoitika panguva yekubhureki injini kana throttle yakavharwa. Iyo yakaderera vacuum inoitika kana idling, uye iyo diki vacuum inoitika mune yekumhanyisa, apo injini inokwevera mumhepo yakawanda. MAP inovimbika zvakanyanya asi haina kunyatsojeka. MAF - Airweight ndeyechokwadi asi inonyanya kukuvara. Dzimwe (kunyanya dzine simba) mota dzine Mass Air Flow (Mass Air Flow) uye MAP (MAP) sensor. Mumamiriro ezvinhu akadaro, iyo MAP inoshandiswa kudzora basa rekusimudzira, kudzora kupera kwegasi recirculation basa, uye zvakare se backup muchiitiko chekutadza kwemhepo kuyerera kwemhepo.
