Patent ID: 11859527
Assignee: MARELLI EUROPE S.P.A.
Field: Environmental technology (Chemistry)
Classification: CPC F  Y | IPC F

Claim 4:
5. The method according to claim 4 comprising the further steps of:
calculating a further closed-loop contribution ({dot over (m)}A_CL) of air flow rate by means of a PID controller, which zeroes a difference between the objective value (λOBJ) of the air/fuel ratio and the actual value (λ) of the air/fuel ratio measured by the oxygen sensor 18, 18*, 18**);
determining a further contribution ({dot over (m)}A_ADAT) of air flow rate depending on the integral action of the PID controller under stationary conditions; and
determining the estimate of the air flow rate ({dot over (m)}A) by means of a sum of a nominal value of the air flow rate ({dot over (m)}A_NOM), the further closed-loop contribution ({dot over (m)}A_CL) of air flow rate and the further contribution ({dot over (m)}A_ADAT) of air flow rate.