| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a regeneration start timing control device for an exhaust emission control filter, capable of preventing deterioration of fuel economy in regeneration of the exhaust emission control filter. <P>SOLUTION: A basic value of reference particulate accumulation quantity for starting regeneration control of the exhaust emission control filter is set, a first integrated value is counted up based on the engine operating state, and a first correction value is set to increase at a predetermined ratio to the increase in the first integration value. A second integrated value is counted up based on the engine operating state, a second correction value is set to increase at a predetermined ratio to the increase in the second integrated value. The basic value of reference particulate accumulation is corrected based on the first correction value and the second correction value, and a particulate accumulation quantity accumulated in the exhaust emission control filter is detected. When the particulate accumulation quantity accumulated in the exhaust emission control filter is larger than the corrected reference particulate accumulation quantity, the regeneration control of the exhaust emission control filter is started. <P>COPYRIGHT: (C)2011,JPO&INPIT |
