METHOD FOR CHECKING AN SCR SYSTEM HAVING AT LEAST TWO METERING VALVES

The invention relates to a method for checking an SCR system having at least two metering valves. The SCR system includes a delivery pump and a plurality of metering valves (A, B), at least one of which is faulty. The method includes the following steps: initially, obtaining (200) the total fine-tuning amount (Yg) of the SCR system (1) from the mass (mp) of a reducing agent solution transferred bya transfer pump (41) and the nominal mass (mD) of the reducing agent solution fed through all the metering valves (A, B); and then obtaining (300) the mass share ([mu]A) of the reducing agent solution used for one of the metering valves (A). One of the metering valves (A) has been fed with the mass share ([mu]A) during the previous adaptation cycle (220). 本发明涉及一种用于对SCR系统进行检查的方法，所述SCR系统包括输送泵和多个配量阀（A、B），其中至少一个配量阀有故障。所述方法包括以下步骤：在一开始从还原剂溶液的通过所述输送泵（41）输送的质量（m）和还原剂溶液的通过所有配量阀（A、B）配入的标称质量（m）中求取（200）所述SCR系统（1）的总微调量（Y）。而后求取（300）用于所述配量阀之一（A）的还原剂溶液的质量份额（μ），在前一个适应周期（220）期间其中一个配量阀（A）已经配入了所述质量份额（μ）。