| 摘要 |
An intake air amount control system for an internal combustion engine, which is capable of ensuring high robustness and improving controllability in intake air amount control, to thereby improve drivability and reduce exhaust emissions. A control system 1 of an internal combustion engine 3 , which variably controls the amount of intake air drawn into cylinders # 1 to # 4 as desired via a variable intake valve actuation assembly 40 includes an ECU 2 . The ECU 2 calculates a cylinder intake air amount Gcyl and a target intake air amount Gcyl_cmd (step 16 ), identifies, based on a controlled object model [equation (2)], a vector thetas of all model parameters of the controlled object model with an identification algorithm [equations (8) to (13)], calculates a target auxiliary intake cam phase thetamsi_cmd based on the vector thetas with a sliding mode control algorithm [equations (15) to (21)] (step 80 ), and controls the variable intake valve actuation assembly 40 according to the target auxiliary intake cam phase thetamsi_cmd.
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