emission repair Longfield

SCR (ang. Catalic Selective Reduction) urea dosing system (AdBlue), consists of a tank of AdBlue, a pump ensures satisfactory fluid pressure, cares about its thermal properties plus the same waveform monitoring the particular reduction of emissions plus the SCR catalyst. The principle of functioning It lies in dealing with exhaust gases during engine operation. Everything happens without modifying the operating mode with the engine. AdBlue dosing system is autonomous and does not affect the operation with the engine, does not also boost fuel consumption. The high exhaust temp causes the injected urea alterations into ammonia and carbon dioxide and then the SCR catalyst ammonia and then reaction with the nitrogen oxides formed on account of which the volatile nitrogen and water vapor. System failures They are mainly relevant to low temperatures. AdBlue freezes at a new temperature below 11, 5st C which makes the system at these temperatures will not work. Only a few moments after starting the engine heater, which is controlled from the module AdBlue (AdBlue pump motor controller) causes fluid to loosen up the achievement of the particular liquid and liquid form urea dosing starts. Crystallization of liquid that develops during freezing and thawing causes clogging with the AdBlue injector. Clogged injector is the most common causes of disappointment AdBlue dosing system. NOx sensor In newer versions (Euro5), the second temperature sensor exhaust system has become replaced with nitrogen oxide sensor. The sensor is quite expensive and while doing so 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 inside vehicle emission reduction program, the dashboard appears icon plus the message about the disappointment of AdBlue dosing program. If the deficiency just isn't remedied within 50 hours of torque will probably be reduced to 60%. Reduction in power occurs usually in cars manufactured following 11. 2007 years, if the car had executed a software update are located in copies made earlier. Vehicles of special providers, ie. Police, Ambulance, Army does not possess the stop. Repair of AdBlue pump normally will depend on the crystallization of urea inside interior and clogging pipe joints.