| 摘要 |
An exhaust gas cleaning system is provided that includes a particulate filter in an exhaust passage. The exhaust gas cleaning system is configured and arranged to determine an accumulation state of particulate matter in a particulate filter by obtaining a reference equivalent surface area of a passage inside the particulate filter based on a pressure difference between before and after the particulate filter, an exhaust gas flow rate, and a temperature of the exhaust gas passing through the particulate filter. The exhaust gas cleaning system is configured and arranged to obtain an adjusted equivalent surface area by adjusting the reference equivalent surface area based on a temperature of the particulate filter and the exhaust gas flow rate. Thus, an amount of particulate matter accumulated in a particulate filter of a diesel engine is accurately estimated without the estimation result being erroneously affected by the engine operating conditions. |
