Lub hauv paus chiv keeb thiab txheej xwm: Vim lub cheeb tsam tiv thaiv ib puag ncig ntawm ntau lub teb chaws tuaj yeem txo cov emission ntawm cov pa roj carbon dioxide nitrogen oxides.
Txuas nquag hu ua Euro IV qauv.
Engine manufacturers tau pib siv SCR technology (selective catalytic txo tshuab tshuab xim catalytic txo kom zoo) kom tau raws li ib puag ncig kev lag luam.
Diesel Exhaust Treatment kua (feem ntau hu ua: Automotive urea, tsheb urea, automotive environmental urea), SCR tshuab yuav tsum siv nyob rau hauv consumables. Lub SCR system muaj ib lub tank (uas muaj cov roj diesel exhaust fluid) thiab SCR catalytic tshuaj tiv thaiv tank.
Kev khiav dej num ntawm SCR yog: thaum nitrogen oxides muaj nyob rau hauv cov pa yeeb nkab, lub urea lub tank tuaj tshuaj tawm lub roj hluav taws xob tua, cov roj diesel exhaust tshuaj thiab nitrogen oxides hauv lub SCR catalytic tshuaj tiv thaiv tank, oxidation yuav txo cov tshuaj tiv thaiv , tiam ntawm cov uas tsis-polluting nitrogen thiab chav paug. Yog hais tias cov roj hauv tsev kho mob tsis muaj roj, lossis cov purity tsis txaus, lossis qhov zoo tsis zoo, lub tsheb cav yuav cia li qis.
Tib lub sij hawm, qhov zoo tshaj ntawm shoddy diesel cav pa tshuaj yuav paug cov catalysts nyob rau hauv SCR catalytic tshuaj tiv thaiv tank, uas ua rau lub txim loj. Qhov tseeb, nyob hauv Tebchaws Europe, 2006 tau pib siv txoj cai no. European Diesel Pa tshuaj tua kab mob hu ua AdBlue.
Tus sawv cev tseem ceeb yog BP thiab yog li ntawd. Nyob hauv tebchaws Asmesliskas, pib xyoo 2010, nrog rau qhov kev tsim ntawm EPA2010 tus qauv, tab sis kuj tseem nce siab ntxiv rau qhov kev siv ntawm daim ntawv thov ntawm cov khoom, hauv Tebchaws Meskas, kev kho hluav taws xob diesel hu ua DEF (Diesel exhaust fluid).
Tus sawv cev tseem ceeb muaj BLUEDEF thiab hais txog.
Tam sim no, cov khoom no muaj ob daim ntawv pov thawj thoob ntiaj teb, ib lub koom haum German Automobile Industry Association (VDA) AdBlue certification, lwm qhov yog American Petroleum Institute (API). Nyob hauv tsev, kev tsim cov roj diesel exhaust tseem yog ib qhov kev lag luam tshiab, nws yuav tsum tau nyob rau hauv qhov thib ib nrab ntawm 2011 lossis thawj ib nrab ntawm xyoo 2012 yuav raug tsim nyob rau hauv Suav teb tus kheej diesel exhaust kua khoom qauv teb chaws.