Shigar da zafin iska
Abubuwa
Na al'ada DTVV
Shigar da zafin iska yana ɗaya daga cikin tsarin da na'urori masu auna firikwensin da yawa a cikin mota. lalacewa a cikin aikinsa na iya yin tasiri kai tsaye ga aikin injin konewa na ciki, musamman a lokacin sanyi.
Menene firikwensin iska kuma a ina yake
Na'urar firikwensin zafin iska (wanda aka gajarta DTVV, ko IAT a Turanci) da ake buƙata don daidaita abun da ke cikin cakuda man feturaka kawota ga injin konewa na ciki. Wannan wajibi ne don aikin al'ada na motar a cikin yanayin zafi daban-daban. Saboda haka, kuskure a cikin na'urar firikwensin zafin iska zuwa ga ma'auni na barazana ga yawan amfani da mai ko rashin kwanciyar hankali na injin konewa na ciki.
DTVV yana kan gidan tace iska ko bayansa. Ya dogara da ƙirar motar. Shi yi daban ko na iya zama wani ɓangare na babban firikwensin iska (DMRV).
Ina na'urar firikwensin zafin iska take?
gazawar firikwensin zafin iska
Akwai alamomi da yawa na na'urar firikwensin zafin jiki na rashin aiki. Tsakanin su:
- katsewa a cikin aikin injin konewa na ciki a aiki (musamman a lokacin sanyi);
- maɗaukaki ko ƙananan gudu marar aiki na injin konewa na ciki;
- matsaloli tare da farawa injin konewa na ciki (a cikin sanyi mai tsanani);
- raguwa a cikin ikon ICE;
- man fetur ya cika.
Rashin lalacewa na iya zama saboda dalilai masu zuwa:
- lalacewar inji ga firikwensin da ke haifar da tsayayyen barbashi;
- asarar hankali saboda gurbatawa (ƙara a cikin inertia na masu wucewa);
- rashin isassun wutar lantarki a cikin tsarin lantarki na abin hawa ko ƙananan lambobin lantarki;
- gazawar siginar siginar na'urar firikwensin ko aikin sa ba daidai ba;
- gajeren kewaye a cikin IAT;
- gurbatar lambobin firikwensin.
Dubawa da tsaftacewa DTVV.
Duban firikwensin zafin iska mai sha
Kafin ka bincika na'urar firikwensin zafin iska, kana buƙatar fahimtar ka'idar aikinsa. Na'urar firikwensin yana dogara ne akan thermistor. Dangane da zafin iska mai shigowa, DTVV yana canza juriyar wutar lantarki. Ana aika siginonin da aka samar a wannan yanayin zuwa ECM don samun daidaitaccen cakuda man fetur.
Dole ne a yi gwajin na'urar firikwensin zafin iska ta hanyar auna juriya da girman siginar lantarki da ke fitowa daga gare ta.
Gwajin yana farawa da lissafin juriya. Don yin wannan, yi amfani da na'urar ohmmeter ta hanyar cire firikwensin daga motar, tsarin yana faruwa ta hanyar cire haɗin waya biyu tare da haɗa su zuwa na'urar aunawa (multimeter). Ana yin ma'auni a cikin hanyoyi guda biyu na aiki na injin konewa na ciki - "sanyi" kuma a cikin cikakken sauri.
Ma'aunin wutar lantarki
Ma'aunin juriya na Sensor
A cikin akwati na farko, juriya za ta kasance babban juriya (da yawa kOhm). A cikin na biyu - ƙananan juriya (har zuwa kOhm ɗaya). Umarnin aiki don firikwensin dole ne ya kasance yana da tebur ko jadawali tare da ƙimar juriya ya dogara da yanayin zafi. Mahimman karkatacce suna nuna rashin aiki na na'urar.
A matsayin misali, muna ba da tebur na rabon zafin jiki da juriya na firikwensin iska don injunan konewa na motar Vaz 2170 Lada Priora:
| Yawan zafin jiki na iska, ° C | Resistance, kOhm |
| -40 | 39,2 |
| -30 | 23 |
| -20 | 13,9 |
| -10 | 8,6 |
| 0 | 5,5 |
| + 10 | 3,6 |
| + 20 | 2,4 |
| + 30 | 1,7 |
| + 40 | 1,2 |
| + 50 | 0,84 |
| + 60 | 0,6 |
| + 70 | 0,45 |
| + 80 | 0,34 |
| + 90 | 0,26 |
| + 100 | 0,2 |
| + 110 | 0,16 |
| + 120 | 0,13 |
A mataki na gaba, duba haɗin haɗin kai zuwa na'urar sarrafawa. Wato, ta yin amfani da mai gwadawa, tabbatar da cewa akwai motsin kowane lamba zuwa ƙasa. Yi amfani da ohmmeter, wanda aka haɗa tsakanin mahaɗin firikwensin zafin jiki da mai haɗa na'urar sarrafawa da aka cire. A wannan yanayin, ƙimar dole ne 0 ohm (lura cewa kuna buƙatar pinout don wannan). Bincika kowace lamba akan mahaɗin firikwensin tare da ohmmeter tare da katse mai haɗin da ƙasa.
Ma'aunin juriya na DTVV na Toyota Camry XV20
Misali, don duba juriyar firikwensin a motar Toyota Camry XV20 mai injin silinda 6, kuna buƙatar haɗa ohmmeter (multimeter) zuwa abubuwan firikwensin firikwensin na 4 da 5 (duba adadi).
Duk da haka, mafi yawan lokuta DTVV yana da nau'i biyu na thermistor, tsakanin abin da ya zama dole don duba juriya na kashi. Hakanan muna kawo hankalinku tsarin haɗin IAT a cikin motar Hyundai Matrix:
Tsarin haɗin kai don DTVV tare da DBP don Hyundai Matrix
Mataki na ƙarshe na tabbatarwa shine gano wutar lantarki a mahaɗin. A wannan yanayin, kuna buƙatar kunna wutan motar. Darajar siginar lantarki ya kamata ya zama 5 V (ga wasu samfuran DTVV, wannan ƙimar na iya bambanta, duba shi a cikin bayanan fasfo).
Na'urar firikwensin zafin iska mai ɗaukar iska na'urar semiconductor ce. Sakamakon haka, ba za a iya daidaita shi ba. Yana yiwuwa kawai don tsaftace lambobin sadarwa, duba siginar wayoyi, da kuma maye gurbin na'urar gaba daya.
Gyaran firikwensin zafin iska mai ɗaukar iska
Ta yaya zan iya gyara na'urar firikwensin BB.
A sosai nau'in gyaran IAT mafi sauƙi - tsabtatawa. Don yin wannan, kuna buƙatar wani nau'in ruwa mai tsaftacewa (mai tsabtace carb, barasa, ko wani mai tsabta). Koyaya, ku tuna cewa kuna buƙatar yin aiki a hankali, don yin hakan kar a lalata lambobi na waje.
Idan kun haɗu da matsala inda firikwensin ya nuna zafin jiki mara kyau, maimakon cikakken maye gurbin, zaku iya gyara ta. Domin wannan saya thermistor tare da halaye iri ɗaya ko makamancin hakawanda aka riga an shigar da thermistor akan motar.
Mahimmancin gyaran shine soldering da maye gurbin su a cikin gidan firikwensin. Don yin wannan, kuna buƙatar ƙarfe mai siyar da kayan aikin da suka dace. Amfanin wannan gyare-gyaren yana da mahimmancin tanadin kuɗi, kamar yadda thermistor ke kashe kimanin dala ɗaya ko ƙasa da haka.
Maye gurbin na'urar firikwensin zafin iska
Hanyar maye gurbin ba ta da wahala kuma baya ɗaukar lokaci mai yawa. An ɗora firikwensin akan bolts 1-4 waɗanda ke buƙatar cirewa, da kuma motsi mai sauƙi don cire haɗin haɗin wutar lantarki don cire firikwensin iska daga wurinsa.
Lokacin siyan sabon firikwensin, tabbatar da cewa ya dace da motarka. Farashin sa ya bambanta daga $30 zuwa $60, ya danganta da nau'in mota da masana'anta.
