Mazda ta ci gaba da haɓaka fasahar Skyactiv a cikin tubalan man fetur da dizal. Gano sabuwar rukunin Skyactiv D na 1.5 wanda zai fara farawa a Mazda 2 na gaba.
Bayan 2.2 Skyactiv D block, yanzu akwai ƙaramin ɗan'uwa, 1.5 Skyactiv D, wanda ke da alamar halarta ta farko tare da Mazda 2 na gaba.
Wannan sabon injin daga Mazda tare da fasahar Skyactiv ya riga ya cika ka'idodin EURO 6, kuma yana yin hakan ba tare da wani tsarin haɓaka ba. Amma don cimma wannan sakamako, Mazda ta fuskanci matsaloli da yawa waɗanda ke iyakance yuwuwar injinan Diesel.
Koyaya, sakamakon da aka samu, ta yin amfani da turbocharger mai jujjuyawar geometry da haɗaɗɗen firikwensin juyawa, tare da mai sanyaya ruwa mai sanyaya ruwa, yana gamsar da alamar Jafan. Na biyu, zai inganta inganci da amsawar 1.5 Diesel block. Mazda ta yi imanin cewa za ta sami injin dizal mafi ƙarancin amfani a aji.
1.5 Skyactiv D block yana gabatar da kansa tare da motsi na 1497cc da 105 horsepower a 4000rpm, matsakaicin karfin juyi na 250Nm yana bayyana a farkon 1500rpm kuma ya kasance mai tsayi har zuwa kusan 2500rpm, duk tare da CO₂ watsi da kawai 90g/km.
Amma don isa ga waɗannan dabi'u, ba duk abin da ke da kyau ba ne kuma Mazda ya fuskanci matsalolin fasaha da yawa. Matsalolin da bisa ga alamar an shawo kan su, ta hanyar amfani da sababbin fasaha. Amma bari mu shiga cikin sassa, da nufin warware dukkan kalubalen da Mazda ta shawo kan haɓaka wannan injin 1.5 Skyactiv D.
Ta yaya zai yiwu a shawo kan ƙa'idodin muhalli masu buƙata ba tare da buƙatar jiyya ba?
Tubalan dizal gabaɗaya suna aiki akan ƙimar matsawa, fiye da tubalan mai. Hakan ya faru ne saboda takamaiman konewar dizal, wanda ke tashi a matsanancin matsin lamba kuma ba ya fashewa kamar mai, amma yana kama wuta.
Wannan batu ya zama matsala musamman, tun da yake saboda yawan matsawa, lokacin da piston yake a TDC (cibiyar matattu), ƙonewa yakan faru kafin jimlar da cakuda tsakanin iska da man fetur, wanda ya haifar da samuwar iskar NOx kuma gurbataccen abu. Jinkirta allurar man fetur, yayin taimakawa tare da zafin jiki da matsa lamba, yana haifar da mummunar tattalin arziki kuma saboda haka yawan amfani.
Mazda, sane da waɗannan matsalolin, duk da haka ya yanke shawarar yin fare akan rage matsi rabo na dizal Skyactiv tubalan, tare da matsawa rabo na 14.0: 1 - a fili low darajar da dizal block, tun da talakawan yana kusa da 16.0: 1. Yin amfani da wannan bayani, ta yin amfani da pistons daga takamaiman ɗakunan konewa, yana yiwuwa a rage yawan zafin jiki da matsa lamba a cikin PMS na cylinders, don haka inganta cakuda.
Da aka warware wannan matsala, matsalar tattalin arzikin man fetur ta kasance a warware ta, don haka Mazda ta koma ga sihiri na lantarki. A wasu kalmomi, taswirorin allura tare da hadaddun algorithms masu iya aiwatar da ingantacciyar hanyar haɗawa, a cikin toshe tare da ƙarancin matsawa. Bugu da ƙari, abubuwan da ke da amfani a kan konewa, raguwa a cikin ma'auni ya sa ya yiwu a rage nauyin toshe, saboda yana da ƙananan matsa lamba na ciki, don haka inganta amfani da saurin amsawar injin.
Ta yaya Mazda ta magance matsalar farawa sanyi da zafi mai zafi tare da ƙarancin matsi?
Waɗannan su ne sauran matsalolin guda biyu waɗanda ke haifar da ƙarancin matsi na toshe. Tare da ƙarancin matsawa, yana da wuya a gina isasshen matsa lamba da zafin jiki don man fetur ya kunna. A gefe guda, lokacin da toshe ya yi zafi, ƙarancin matsawa yana sa wuraren kunna wuta da wahala ga ECU don sarrafawa.
Saboda waɗannan batutuwan ne Mazda ta yanke shawarar haɗawa a cikin 1.5 Skyactiv D block, sabon injectors na Piezo tare da nozzles 12-rami, ba da damar nau'ikan allura da yanayin aiki a cikin ɗan gajeren lokaci, sarrafa yin matsakaicin matsakaicin 9 injections. sake zagayowar , ba da damar sarrafa ƙaddamar da cakuda, magance matsalar fara sanyi.
Baya ga nau'ikan allura na asali guda 3 (kafin allura, babban allura da allurar bayan allura) waɗannan injectors na Piezo na iya yin nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan nau'ikan yanayi daban-daban bisa ga yanayin yanayi da nauyin injin.
An warware matsalar kunna wuta ta atomatik, tare da yin amfani da lokaci mai canzawa. Wuraren shaye-shaye suna buɗewa kaɗan yayin lokacin sha, yana ba da damar sake yin amfani da iskar gas ɗin zuwa ɗakin konewa, yana ƙara yawan zafin jiki, ba tare da ƙirƙirar wuraren matsa lamba ba, tunda a cikin Diesel ya toshe yanayin zafi yana tashi a cikin ɗakin konewa. ramawa don amfani da ma'aunin matsi mai girma, wanda hakan ke haifar da matsa lamba masu wuyar sarrafawa.