Patent ID: 9291113
Filing Date: 2016-03-22
CPC Classification: F02D,Y02T

Claim Text:
1. A method for operating an internal combustion engine, the internal combustion engine having at least one cylinder, to which are connected an intake manifold having an air mass sensor, an exhaust pipe having a λ-sensor and an exhaust gas recirculation line having an exhaust gas recirculation valve, the air mass sensor being provided for generating an air mass sensor signal, the λ-sensor being provided for generating a λ-sensor signal, and the exhaust gas recirculation valve being controlled using a control signal, the method comprising: forming, by a control unit including a processor, a setpoint injection quantity; forming, by the control unit, a signal indicating whether the air mass sensor operates properly or is defective; forming, by the control unit, an air mass replacement signal for the air mass sensor signal as a function of the λ-sensor signal and the setpoint injection quantity; if the air mass sensor operates properly, forming by the control unit the control signal for controlling the exhaust gas recirculation valve as a function of the air mass sensor signal generated by the air mass sensor; if the air mass sensor is defective, forming the control signal as a function of the air mass replacement signal; and controlling the exhaust gas recirculation valve using the control signal.