INTAKE AIR AMOUNT CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide an intake air amount control system for an internal combustion engine capable of ensuring high robustness and improving controllability in intake air amount control to improve operation property and exhaust gas characteristic. SOLUTION: This intake air amount control system 1 for the internal combustion engine 3 for freely changing and controlling amount of intake air sucked into cylinders #1 to #4 through a variable suction valve driving device 40 is provided with an ECU 2. The ECU 2 calculates cylinder suction air amount Gcyl and target suction air amount Gcyl_cmd (step 16) and identifies vectorθs of all model parameters of model to be controlled by identification algorithm [expression (8) to (13)] based on the model to be controlled [expression (2)]. It calculates target auxiliary suction cam phaseθmsi_cmd (step 80) by sliding mode control algorithm [expression (15) to (21)] in accordance with the vectorθs to control the variable suction valve driving device 40 in accordance with the target auxiliary suction cam phaseθmsi_cmd. COPYRIGHT: (C)2005,JPO&NCIPI