| 摘要 |
<p>The invention pertains to a method to detect at least one defective NOx sensor (255; 265) arranged in an exhaust pipe (290) from an engine (206), comprising the steps: - to continuously determine an NOx level in the exhausts from said engine (206) in said exhaust pipe (290) with said NOx sensor (255; 265); - to determine a rate of change (Η') in said continuously determined NOx level; - to compare a size of said rate of change (Η') with a predetermined value (H'max); and - in cases where said size of said rate of change (H') exceeds said predetermined value (H'max), to treat it as an indication that said NOx sensor (255; 265) is defective. The invention also pertains to a device for detecting at least one defective NOx sensor (255; 265) arranged in an exhaust pipe (290) from an engine (206), and a motor vehicle (100) comprising said device.</p> |
