The use of urea in cars is very harmful.
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The use of urea in cars is very harmful.
(1) remove OBD or modify CPU usage.
In the process of the users in the use of the four cars there are many misconceptions some drivers in order to reduce the cost of charging for urea take car alarm equipment of urea OBD demolition to review the car mount when some changes to the CPU data so as to avoid charging urea or vehicle to reach the role of false environmental data to do so if there was any harm?
Related technical experts explain to us: the fool OBD monitoring the vehicle on the SCR system in urea run out of unlimited power thus appears to be reduced a lot of trouble but because of the four in order to reduce the PM emissions to favour fully burning engine NOx emissions will not reduce this exhaust will also rise even more than the three vehicles exhaust pollution. At the same time the SCR system does not work for a long time results in a residue in the SCR system for urea solution crystallization pipeline and spray nozzle and because of the long-term lack of soaking liquid of life of parts of the SCR system to reduce or even damaged catalyst lost catalytic role can produce 3-50000 yuan of the cost of maintenance although this short-term reduces the vehicles use cost actually do more harm than good.
(2) add water as usual.
Related technical expert points out the user of this method is relatively hidden but the replaced motor urea solution or diluted with water for urea solution water or diluted by water concentration less than 32.5% of vehicle urea solution but not to restore the exhaust gas make the NOx emission is still too high reduce emissions optimize the environment of "the four" standard also is a dead letter.
Water use for a long time can lead to SCR systems don't work for a long time OBD system will increase directly reduce the engine power output and fuel consumption but also can damage the SCR system components and in the total cost of a SCR system from 70000 to 80000 separate replacement nozzle also need 2000 multivariate severe cases damaged catalyst can produce 3-50000 yuan of the cost of maintenance although this short-term reduces the vehicles use cost actually do more harm than good.
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