| 摘要 |
PROBLEM TO BE SOLVED: To suppress overshoot of actual intake air quantity with respect to required intake air quantity while securing the responsiveness of intake air quantity control of an internal combustion engine. SOLUTION: The required intake air quantity Mt is converted to a model after required intake air quantity Mtsm by a normative model 31, and a target throttle openingθt for achieving the model after required intake air quantity Mtsm is calculated using an inverse model of an intake system model considering a response delay of an intake system, etc. Then, the target throttle openingθt and its change speed are restricted by a guard value and a final target throttle openingθtt is set. When the change speed of the target throttle openingθt is guarded by the guard value, a previous value Mtsm.old of the model after required intake air quantity used when the model after required intake air quantity Mtsm is calculated by the normative model 31 is replaced with virtual intake air quantity Mvt (actual intake air quantity estimated based on the previous final target throttle openingθtt) so as to temporarily lower the responsiveness of the model after required intake air quantity Mt. COPYRIGHT: (C)2011,JPO&INPIT |
