| 摘要 |
In an engine output control system, the exhaust gas pressure PPREDPF immediately before the DPF (filter) that captures particulates entrained by the exhaust gas is detected (S100 to S104), the engine output upper limit value (TLMT1) is calculated so that the upper limit value decreases with increasing exhaust gas pressure (S106), and the engine output is controlled based on the calculated upper limit value (S108 to S116). Thus, by ascertaining rise in the temperature and pressure of the exhaust system owing to clogging of the DPF virtually directly and restricting the output of the engine accordingly, excessive exhaust temperature increase can be avoided, thereby preventing degradation of exhaust system components, and excessive exhaust gas pressure increase can be avoided, thereby inhibiting exhaust gas leakage from exhaust system component joints with high reliability.
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