. "Selektivn\u00ED katalytick\u00E1 redukce (SCR - Selective Catalytic Reduction) je jedna ze dvou technologi\u00ED, kter\u00E9 umo\u017E\u0148uj\u00ED sn\u00ED\u017Eit emise v\u00FDfukov\u00FDch plyn\u016F vzn\u011Btov\u00FDch motor\u016F na \u00FArove\u0148 norem Euro IV a V."@cs . "16412790"^^ . . . . "Selektivn\u00ED katalytick\u00E1 redukce"@cs . . . "Selektivn\u00ED katalytick\u00E1 redukce (SCR - Selective Catalytic Reduction) je jedna ze dvou technologi\u00ED, kter\u00E9 umo\u017E\u0148uj\u00ED sn\u00ED\u017Eit emise v\u00FDfukov\u00FDch plyn\u016F vzn\u011Btov\u00FDch motor\u016F na \u00FArove\u0148 norem Euro IV a V. Technologie p\u0159edpokl\u00E1d\u00E1 motor upraven\u00FD maxim\u00E1ln\u011B pro sn\u00ED\u017Een\u00ED produkce pevn\u00FDch \u010D\u00E1stic (PM = Particulate Matter, dal\u0161\u00ED z emis\u00ED limitovan\u00FDch legislativou Euro), p\u0159i\u010Dem\u017E p\u0159i tomto protich\u016Fdn\u00E9m procesu zv\u00FD\u0161en\u00FD obsah NOX je redukov\u00E1n n\u00E1sledn\u00FDm o\u0161et\u0159en\u00EDm v\u00FDfukov\u00FDch plyn\u016F (aftertreatment) metodou SCR pod limit p\u0159edpisu. Sn\u00ED\u017Een\u00ED obsahu t\u011Bchto l\u00E1tek (p\u0159ev\u00E1\u017En\u011B NOX) se dosahuje vst\u0159ikov\u00E1n\u00EDm kapaliny obchodn\u00EDho n\u00E1zvu AdBlue (vodn\u00ED roztok syntetick\u00E9 mo\u010Doviny) do v\u00FDfuku, \u010D\u00EDm\u017E se v\u011Bt\u0161ina NOX za p\u0159\u00EDtomnosti chemick\u00E9ho katalyz\u00E1toru a dostate\u010Dn\u00E9 teploty redukuje na vodu (H2O) a dus\u00EDk (N2). Spot\u0159eba AdBlue \u010Din\u00ED pr\u016Fm\u011Brn\u011B jednotky procent spot\u0159ebovan\u00E9ho paliva. P\u0159i poru\u0161e syst\u00E9mu (nebo p\u0159i nedostatku, \u010Di nespr\u00E1vn\u00E9 kvalit\u011B AdBlue, nedosa\u017Een\u00ED pot\u0159ebn\u00E9 teploty, ..) motor funguje d\u00E1l, pouze stoupnou emise NOX p\u0159ibli\u017En\u011B na \u00FArove\u0148 normy Euro III - u v\u011Bt\u0161iny vozidel zas\u00E1hne v tomto okam\u017Eiku v definovan\u00FDch p\u0159\u00EDpadech v duchu legislativy OBD (On Board Diagnostic) \u0159\u00EDdic\u00ED jednotka a omez\u00ED dle ustanoven\u00ED (podle hmotnostn\u00ED kategorie vozu o 25-40%) v\u00FDkon motoru, aby donutila \u0159idi\u010De natankovat AdBlue, pop\u0159\u00EDpad\u011B nechat syst\u00E9m opravit. V\u00FDhodou oproti technologii EGR jsou ni\u017E\u0161\u00ED n\u00E1roky na chlazen\u00ED motoru a ni\u017E\u0161\u00ED spot\u0159eba paliva. Nev\u00FDhodou je prostor a hmotnost, kter\u00FD tato technologie pot\u0159ebuje pro n\u00E1dr\u017E AdBlue (katalyz\u00E1tor se prostorem a hmotnost\u00ED vyrovn\u00E1 \u010D\u00E1sticov\u00E9mu filtru DPF a chladi\u010Di EGR obvykle pou\u017Eit\u00FDch u konkuren\u010Dn\u00ED technologie). I proto se zat\u00EDm t\u00E9m\u011B\u0159 nepou\u017E\u00EDv\u00E1 u men\u0161\u00EDch motor\u016F osobn\u00EDch a v\u011Bt\u0161iny dod\u00E1vkov\u00FDch vozidel. Tuto technologii naopak pou\u017E\u00EDvaj\u00ED t\u00E9m\u011B\u0159 v\u0161ichni v\u00FDrobci n\u00E1kladn\u00EDch vozidel a autobus\u016F krom\u011B n\u011Bkter\u00FDch motor\u016F MANu a Scania, kter\u00E9 vyu\u017E\u00EDvaj\u00ED technologii EGR a DPF. Ta je zalo\u017Eena na opa\u010Dn\u00E9m principu - maxim\u00E1ln\u011B omezit pod\u00EDl NOX b\u011Bhem spalov\u00E1n\u00ED a n\u00E1sledn\u011B dodate\u010Dn\u00FDm o\u0161et\u0159en\u00EDm spalin \u0159e\u0161it vy\u0161\u0161\u00ED obsah pevn\u00FDch \u010D\u00E1stic jejich zachycov\u00E1n\u00EDm a spalov\u00E1n\u00EDm ve filtru um\u00EDst\u011Bn\u00E9m ve v\u00FDfukov\u00E9m potrub\u00ED.Pro spln\u011Bn\u00ED americk\u00E9 normy EPA 2010 a evropsk\u00E9 Euro VI je v\u011Bt\u0161ina v\u00FDrobc\u016F nucena ob\u011B \u0159e\u0161en\u00ED SCR a EGR kombinovat. Firma IVECO ozn\u00E1mila pln\u011Bn\u00ED Euro VI \u010Dist\u011B s technologi\u00ED SCR."@cs . . . . . "16"^^ . . . "selektivn\u00ED katalytick\u00E1 redukce"@cs . . "selektivn\u00ED katalytickou redukci"@cs . "202018"^^ . "2762"^^ . . . . . . . "Selektivn\u00ED katalytick\u00E1 redukce"@cs .