| 摘要 |
<p>Provided is a DPF system that can prevent the catalytic activity of a DOC from degrading due to hydrocarbon poisoning when exhaust-pipe injection is used to increase the temperature of exhaust gas. Said DPF system (10) performs DPF regeneration wherein fuel is injected using an exhaust-pipe injector (24) and said fuel is oxidized/combusted in a DOC (23), thereby using combustion to remove particulate matter accumulated in a DPF. Said DPF system is provided with: temperature sensors (25 and 26) provided before and after the DOC (23); and a poisoning-prevention means (29). The amount of fuel injected (Q) by the exhaust-pipe injector (24) and the temperatures (T1 and T2) detected by the temperature sensors are inputted to the poisoning-prevention means, which uses said input to determine whether or not the amount of heat generated by the DOC (23) is appropriate.</p> |
