SCR fault diagnosis method and device
A fault diagnosis and detection technology, which is applied in the diagnosis device of exhaust treatment device, electronic control of exhaust treatment device, complex mathematical operation, etc., can solve the problems of easy false alarm and no alarm, etc. Diagnosis accuracy and accuracy, and the effect of improving user experience
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[0045] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.
[0046] Diesel engines will produce harmful nitrogen oxides (NO X ), in order to meet the statutory emission requirements of diesel engines, most of the aftertreatment systems of existing diesel engines are equipped with selective catalytic reduction units (Selective Catalystic Reduction, SCR). The selective catalytic reduction unit reduces nitrogen oxides into harmless nitrogen by spr...
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