| 摘要 |
An exhaust gas purification device includes an exhaust gas after-treatment device provided in an exhaust passage of an internal combustion engine, and has an oxidation catalyst and a DPF or diesel particulate filter. The exhaust gas purification device also includes an exhaust pipe injector which feeds a fuel to the oxidation catalyst, and a control unit which controls regeneration of the filter by supplying the oxidation catalyst with the fuel from the exhaust pipe injector. The control unit determines whether the filter is in a regeneration-possible state, i.e., whether the oxidation catalyst is maintained at a high temperature allowing regeneration of the filter. If the control unit determines during regeneration control of the filter that the filter is not in the regeneration-possible state, then the control unit halts the regeneration control until the regeneration-possible state is reached. |
| 主权项 |
1. An exhaust gas purification device of an internal combustion engine mounted on a vehicle, comprising:
an exhaust gas after-treatment unit provided in an exhaust gas passage of the internal combustion engine, the exhaust gas after-treatment unit having an oxidation catalyst and a filter, the filter configured to collect particulate matters contained in an exhaust gas, the oxidation catalyst being located upstream of the filter in a flow direction of the exhaust gas; a fuel feed unit configured to feed a fuel to the oxidation catalyst; and a control unit configured to cause the fuel feed unit to feed the fuel to the oxidation catalyst to control regeneration of the filter, and to determine whether the filter is in a regeneration-possible state, in which a temperature of the oxidation catalyst is maintained at a high temperature and the filter is ready for regeneration, based on a traveling distance of the vehicle, the control unit being configured to halt the regeneration of the filter until the control unit determines that the regeneration-possible state is reached, if the control unit determines, during the filter regeneration control, that the filter is not in the regeneration-possible state. |
