emission repair Coventry

SCR (ang. Catalic Selective Reduction) urea dosing system (AdBlue), consists of a aquarium of AdBlue, a pump ensures satisfactory fluid pressure, cares about its thermal properties and the same waveform monitoring this reduction of emissions and the SCR catalyst. The principle of operation It lies in the treating exhaust gases during powerplant operation. Everything happens without adjusting the operating mode on the engine. AdBlue dosing system is autonomous and isn't going to affect the operation on the engine, does not also enhance fuel consumption. The high exhaust temperature causes the injected urea adjustments into ammonia and carbon dioxide and then the SCR catalyst ammonia followed by reaction with the nitrogen oxides formed due to which the volatile nitrogen along with water vapor. System failures They are mainly in connection with low temperatures. AdBlue freezes at the temperature below 11, 5st C which makes the system at these temperatures will not work. Only a few minutes after starting the powerplant heater, which is controlled with the module AdBlue (AdBlue send controller) causes fluid to heat up the achievement of this liquid and liquid style urea dosing starts. Crystallization of liquid that develops during freezing and thawing causes clogging on the AdBlue injector. Clogged injector is just about the most common causes of inability AdBlue dosing system. NOx sensor In newer versions (Euro5), the second temperature sensor exhaust system have been replaced with nitrogen oxide sensor. The sensor is quite expensive and at the same time as often crashes. Failure catalyst usually causes the look of errors related for the NOx sensor (too many emissions). Reducing power / torque If the failure occurs from the vehicle emission reduction process, the dashboard appears icon and the message about the inability of AdBlue dosing process. If the deficiency isn't remedied within 50 hours of torque are going to be reduced to 60%. Reduction in power occurs most often in cars manufactured soon after 11. 2007 years, if the car had executed a software update can be found in copies made earlier. Vehicles of special providers, ie. Police, Ambulance, Army does not have the stop. Repair of AdBlue pump normally will depend on the crystallization of urea from the interior and clogging conduits.