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We investigate the feasibility of gasoline engine boost pressure control using Non-linear Model Predictive Control (NMPC) in onvehicle ECU. First, we use a plant model based on the first-principles modeling with polynomial correction terms reduced in complexity by L1 regularization. Second, we adopt the barrier method as the constraint condition for optimization and propose a Pseudo-Barrier Function to improve the stability of numerical calculation. NMPC with the proposed method is implemented in an on-vehicle ECU, and we verify the feasibility of NMPC in an on-vehicle ECU. [ABSTRACT FROM AUTHOR]