Patent ID: 8521402

Claim:
Method of controlling the aspiration of air into a four-stroke internal combustion engine ( 1 ) with controlled ignition comprising at least one cylinder ( 2 ), an intake collector ( 5 ) that feeds fresh air into the cylinder ( 2 ) through at least one intake valve ( 6 ), an injector ( 10 ) that injects fuel into the cylinder ( 2 ), and a control device ( 13 ) for the implementation of the intake valve ( 6 ); the control method comprises the steps of: determining, in a phase prior to the suction phase, a first estimate of the mass (M AIR-DES-1 ) of the desired air to be sucked into the cylinder ( 2 ) during suction phase; determining, in a phase prior to the suction phase, a first forecast (P PR-1 ) of the suction pressure during the suction phase by a first forecast algorithm that uses previous measures (P M ) of the suction pressure; determining, in a phase prior to the suction phase, an initial programming of the suction of air as a function of the first estimate of the mass (M AIR-DES-1 ) of the desired air to be sucked into the cylinder ( 2 ) during the suction phase and of the first forecast (P PR-1 ) of the suction pressure during the suction phase; controlling, until the end of the exhaust phase, the aspiration of air into the cylinder ( 2 ) by piloting the control device ( 13 ) for the implementation of the intake valve ( 6 ) according to the initial programming of the suction of air; and determining a measure (P M-S ) of the suction pressure at the end of exhaust phase; the control method is characterized in that it comprises the additional steps of: determining, at the end of the exhaust phase, a second forecast (P PR-2 ) of the suction pressure during the suction phase by a second forecast algorithm that also uses the measure (P M-S ) of the suction pressure at the end of exhaust phase; determining, the end of the exhaust phase, a final programming of air suction as a function of the second forecast (P PR-2 ) of the suction pressure during the suction phase and of the initial programming of air suction; and controlling, starting from the suction phase, the suction of air into the cylinder ( 2 ) by piloting the control device ( 13 ) for the implementation of the intake valve ( 6 ) according to the final programming of air suction.