Mercedes Benz Bluetech emission system.

MERCEDES  BENZ BLUETEC EMISSIONS TECHNOLOGY  It is the Mercedes benz developed technology designed to control the diesel vehicle emissions making the vehicle operating at highest level of efficiency and power output .This technology is used in EURO 5,EURO 6 AND BS 6 engines.

.  The bluetec emissions technology is the complete emission systems which utilizes the EGR(exhaust gas recirculation) engine and it’s the 1-box system ,which contains the components like Diesel Oxidation Catalyst (DOC),Diesel Particulate Filter(DPF),Diesel Exhaust Fluid tank(DEF tank) and Selective Catalyst Reduction(SCR catalyst).All these components work together to meet current emission  standards  and increases the efficiency of the engine by lowering the back pressure.

HOW DOES BLUETEC WORKS? 
. The bluetec system controls  the emissions by performing several chemical reactions inside the 1-box system. The exhaust gas leaves the engine with NOx , particulate matters and other pollutants .This exhaust gas flows downstream into the 1-box system ,The diesel particulate filter filters the particulates  present in the exhaust gas .Then the exhaust gas flows down stream into and met by the diesel exhaust fluid(should be stored separately).The DEF is hydrolysed into the ammonia gas which continues to mix with the exhaust ,once in the SCR catalyst the ammonia gas and the NOx reacts to form nitrogen and water. 
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The driver should periodically check the DEF tank and should top up it(The DEF level is indicated in the instrument cluster).The DEF consumption is approximately of 2% of diesel fuel used.

WHAT IS DEF FLUID?  Diesel Exhaust Fluid (DEF) is a non-hazardous solution, which is 32.5% urea and 67.5% de-ionized water. DEF is sprayed into the exhaust stream of diesel vehicles to break down dangerous NOx emissions into harmless nitrogen and water.

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