| 摘要 |
An intake air amount control system for an internal combustion engine, which controls respective amounts of intake air drawn into four cylinders # 1 to # 4 , independently of each other, by variable inter-intake cam phase mechanisms 80 , identifies intake air amount variation coefficients Phi#i, based on a model [equation (43)] defining a relationship between an estimated value Gth_est of a TH passing intake air amount and a plurality of simulation values Gcyl_OS#i, such that the estimated value Gth_est becomes equal to the TH passing intake air amount, calculates a target inter-intake cam phase thetassi#i_cmd, on a cylinder-by-cylinder basis, according to the identified intake air amount variation coefficients Phi#i (step 81 ), and calculates control input DUTY_ssi# 2 to # 4 to the variable inter-intake cam phase mechanisms 80 according to the target inter-intake cam phases thetassi#i_cmd (step 75 ).
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