Yadda za a ƙayyade rabon matsawa

Ko kuna gina sabon injin kuma kuna buƙatar awo, ko kuna sha'awar yadda ingantaccen man fetur ɗin motarku yake, yakamata ku iya ƙididdige ƙimar matsewar injin. Akwai ma'auni da yawa da ake buƙata don ƙididdige rabon matsawa idan kuna yin shi da hannu. Suna iya zama kamar masu rikitarwa da farko, amma da gaske su ne ainihin lissafi na asali.

Matsakaicin matsewar injin yana auna abubuwa biyu: gwargwadon adadin iskar gas da ke cikin silinda lokacin da piston yake saman bugun bugunsa (cibiyar mutuwa ta sama, ko TDC), idan aka kwatanta da adadin iskar gas lokacin da piston ke ƙasansa. . bugun jini (matattu cibiyar, ko BDC). A taƙaice, rabon matsawa shine rabon iskar gas ɗin da ba a matsawa ba, ko kuma yadda ake sanya cakudar iska da iskar gas a cikin ɗakin konewa kafin tartsatsin ya kunna shi. Da yawa wannan cakuda ya yi daidai, mafi kyawun konewa kuma yawancin makamashi yana jujjuya wutar lantarki don injin.

Akwai hanyoyi guda biyu da za ku iya amfani da su don ƙididdige ƙimar matsi na injin. Na farko shi ne sigar hannu, wanda ke buƙatar ka yi duk lissafin daidai gwargwado, kuma na biyu—kuma mai yiwuwa ya fi kowa—yana buƙatar saka ma'aunin matsa lamba a cikin kwandon walƙiya mara komai.

Hanyar 1 na 2: Auna rabon matsawa da hannu

Wannan hanyar tana buƙatar ma'auni madaidaici, don haka yana da mahimmanci a sami ingantattun kayan aiki, injin mai tsabta, da duba aikinku sau biyu ko sau uku. Wannan hanya tana da kyau ga waɗanda ko dai ke kera injin kuma suna da kayan aiki, ko kuma waɗanda injin ɗin ya riga ya tarwatse. Don amfani da wannan hanya, zai ɗauki lokaci mai tsawo kafin a kwance injin ɗin. Idan kana da haɗe-haɗen mota, gungura ƙasa kuma yi amfani da hanyar 2 cikin 2.

Abubuwan da ake bukata

• Nutrometer
• Kalkuleta
• Degreaser da rag mai tsabta (idan ya cancanta)
• Littafin jagorar masana'anta (ko littafin mai abin hawa)
• micrometer
• faifan rubutu, alkalami da takarda
• mai mulki ko ma'aunin tef (dole ne ya zama daidai sosai zuwa millimita)

Mataki 1: Tsaftace injin Tsaftace tsaftar injin silinda da pistons tare da na'urar bushewa da rag mai tsafta.

Mataki 2: Nemo girman rami. Ana amfani da ma'auni mai ma'auni don auna diamita na rami ko, a wannan yanayin, silinda. Da farko ƙayyade kimanin diamita na Silinda kuma daidaita tare da ma'aunin ƙirƙira ta amfani da micrometer. Saka ma'aunin matsa lamba a cikin silinda kuma auna diamita mai yawa sau da yawa a wurare daban-daban a cikin silinda kuma yi rikodin ma'auni. Ƙara ma'aunin ku kuma raba ta nawa kuka ɗauka (yawanci uku ko hudu ya isa) don samun matsakaicin diamita. Raba wannan ma'aunin da 2 don samun matsakaicin radiyon rami.

Mataki 3: Yi lissafin girman silinda. Yin amfani da madaidaicin mai mulki ko ma'aunin tef, auna tsayin silinda. Auna daga ƙasa zuwa sama sosai, tabbatar da mai mulki ya miƙe. Wannan lambar tana ƙididdige bugun jini, ko yanki, wanda piston ke motsawa sama ko ƙasa da silinda sau ɗaya. Yi amfani da wannan dabara don ƙididdige ƙarar silinda: V = π r² h

Mataki 4: Ƙayyade ƙarar ɗakin konewa. Nemo ƙarar ɗakin konewa a cikin littafin jagorar mai abin hawa. Ana auna ƙarar ɗakin konewa a cikin santimita cubic (CC) kuma yana nuna adadin abubuwan da ake buƙata don cika buɗe ɗakin konewa. Idan kuna gina inji, koma zuwa littafin jagorar masana'anta. In ba haka ba, koma zuwa littafin mai abin hawa.

Mataki 5: Nemo Tsayin Matsi na Piston. Nemo tsayin matsawa na piston a cikin littafin. Wannan ma'auni shine nisa tsakanin tsakiyar layin fil da saman fistan.

Mataki 6: Auna ƙarar fistan. Kuma a cikin littafin, nemo ƙarar dome ko kan piston, wanda kuma aka auna cikin santimita cubic. Piston tare da ƙimar CC mai mahimmanci ana kiransa koyaushe a matsayin "dome" sama da tsayin matsawa na piston, yayin da "poppet" shine ƙimar da ba ta dace ba don lissafin aljihunan bawul. Yawanci piston yana da kubba da kuma poppet, kuma ƙarar ƙarshe ita ce jimillar ayyukan biyun (dome dena poppet).

Mataki 7: Nemo tazarar da ke tsakanin fistan da bene. Yi ƙididdige adadin ƙyalli tsakanin fistan da bene ta amfani da lissafin da ke gaba: (Bore [aunawa daga mataki na 2] + Diamita na ɗaki × 0.7854 [madaidaicin da ke canza komai zuwa inci cubic] × nisa tsakanin piston da bene a tsakiyar matattu [TDC] ).

Mataki na 8: Ƙayyade Ƙirar Kushin. Auna kauri da diamita na gasket kan silinda don tantance ƙarar gasket. Yi wannan ta hanya ɗaya kamar yadda kuka yi don tazarar bene (mataki na 7): (rami [aunawa daga mataki na 8] + diamita rami × 0.7854 × kauri ga gasket).

Mataki na 9: Ƙididdige rabon matsawa. Yi ƙididdige rabon matsawa ta hanyar warware wannan ma'auni:

Idan ka sami lamba, ka ce 8.75, rabon matsawa zai zama 8.75:1.

• AyyukaA: Idan ba ka so ka gane lambobin da kanka, akwai da yawa online matsawa rabo kalkuleta da za su yi aiki da shi a gare ku; Danna nan.

Hanyar 2 na 2: yi amfani da ma'aunin matsa lamba

Wannan hanya tana da kyau ga waɗanda ke da injin da aka gina kuma suna son duba matsewar motar ta cikin filogi. Kuna buƙatar taimakon aboki.

Abubuwan da ake bukata

• matsa lamba
• Walƙiya walƙiya walƙiya
• Safofin hannu na aiki

Mataki 1: Dumi injin. Guda injin ɗin har sai ya dumama zuwa yanayin zafi na al'ada. Ba kwa son yin wannan lokacin da injin yayi sanyi saboda ba za ku sami ingantaccen karatu ba.

Mataki na 2: Cire tartsatsin wuta. Kashe wutar gaba ɗaya kuma cire haɗin ɗaya daga cikin filogi daga kebul ɗin da ke haɗa shi da mai rarrabawa. Cire walƙiya.

• Ayyuka Idan fitulun tartsatsin ku sun ƙazantu, za ku iya amfani da wannan a matsayin dama don tsaftace su.

Mataki 3: Saka ma'aunin matsi. Saka titin ma'aunin matsa lamba cikin rami inda aka haɗe filogi. Yana da mahimmanci cewa an shigar da bututun ƙarfe a cikin ɗakin.

Mataki na 4: Duba silinda. Yayin da kake riƙe ma'aunin, sa abokinka ya kunna injin kuma ya hanzarta motar na kusan daƙiƙa biyar don samun karatun daidai. Kashe injin, cire titin ma'aunin kuma sake shigar da filogi tare da madaidaicin juzu'i kamar yadda aka umurce a cikin littafin. Maimaita waɗannan matakan har sai kun gwada kowace silinda.

Mataki na 5: Yi gwajin matsa lamba. Kowane silinda dole ne ya sami matsi iri ɗaya, kuma dole ne su dace da lambar da ke cikin littafin.

Mataki na 6: Lissafin PSI zuwa Ratio Matsi. Yi ƙididdige rabon PSI zuwa rabon matsawa. Misali, idan kuna da ma'aunin ma'auni na kusan 15 kuma ƙimar matsawa yakamata ya zama 10: 1, to PSI ɗinku yakamata ya zama 150, ko 15x10/1.