| 摘要 |
<p>Provided is an exhaust purification control system for internal combustion engine, with which it is possible to eliminate deterioration in the purifying efficiency caused by deviation from true values, which is the problem inherent to integrated value control, and to save time in performing resets. An exhaust purification control system (25) of an internal combustion engine comprises: a catalyst (13) that purifies exhaust gas and is disposed on the exhaust path (6) of the internal combustion engine (1); a reactant supply device (30), which supplies a reactant necessary for a catalytic reaction, and which is located on the upstream side of the catalyst (13); and a control device (24) that controls the quantity of reactant (12) supplied by the reactant supply device (30). The control device (24) is configured to carry out: a step in which the basic quantity of reactant supplied (Ub) is calculated from the operating state of the internal combustion engine (1); a step in which a correction amount (Nc) for the basic quantity of reactant supplied (Ub) is calculated from the rate of change in temperature of the catalyst (13) in a transitional period; and a step in which the target quantity of reactant supplied is calculated from the correction quantity (Nc) and the basic quantity of reactant supplied (Ub).</p> |
