| 摘要 |
A regeneration control device which regenerates a filter ( 4 ) which traps particulate matter in the exhaust gas of an engine ( 1 ) is disclosed. The regeneration control device includes a first temperature sensor ( 16, 17 ), which detects one of an upstream temperature and a downstream temperature upstream and downstream of the filter ( 4 ) as a first temperature (Tin, Tout); a second temperature sensor ( 16, 17 ), which detects the other temperature as a second temperature (Tin, Tout); and a microcomputer. The microcomputer programmed to compute an estimated value (Tbede2) for the second temperature based on the first temperature detected by the first temperature sensor ( 16, 17 ), compute an estimated bed temperature (Tbed2) of the filter based on the second temperature detected by a second temperature sensor ( 16, 17 ) and the estimated value (Tbede2) for the second temperature, and perform engine control for increasing the temperature of the exhaust gas based on the estimated bed temperature (Tbed2).
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