| 摘要 |
If it is determined that a precondition (S108, S110, S112) for closing an exhaust throttle valve is not satisfied (“NO”) during removal of PM, auxiliaries that are an air-conditioner, a radio, and an electric fan are turned off. If the precondition is actually satisfied (“YES”) by increasing the likelihood that the precondition is satisfied, it is possible to reduce the opening amount of the exhaust throttle valve (S114). Therefore, the bed temperature of a particulate filter (DPF) is controlled stably, and a sufficient bed temperature is maintained. As a result, the DPF is recovered promptly. In this way, excessive increases in the exhaust gas temperature and the exhaust gas back pressure are not caused, and it is therefore possible to protect an internal combustion engine and to control the opening amount of the exhaust throttle valve appropriately. As a result, it is possible to remove particulate matter stably.
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