SYSTEM FOR DETECTING LEAKAGE IN INTAKE LINE OF INTERNAL COMBUSTION ENGINE Russian patent published in 2019 - IPC F01N13/00 F02D41/00 F02D41/14 F02D41/18 F02D41/22 F02M26/06 F02M26/49 G01M15/05 G01M15/09 

FIELD: internal combustion engines.

SUBSTANCE: invention relates to the field of internal combustion engines equipped with at least one low-pressure channel of an exhaust gas recirculation system. System for detecting a leakage/failure in an intake line of an internal combustion engine comprises an intake line (IL) and an exhaust line (EL), means (HFM) for measuring or for estimating a quantity ( ) of fresh air entering said intake line (IL), means for measuring or for estimating a quantity ( ) of fuel injected in the engine (E), measurement or estimation means (λ and/or NOx), on the exhaust line, adapted to provide a first value (λ_measured) of an air/fuel ratio introduced in the internal combustion engine (E), the system comprising processing means (ECU) adapted to calculate second value (λ_exp) of said air/fuel ratio, calculated on the basis of the measured and estimated quantities of fresh air ( ) and fuel ( ) to calculate an error (λ_err) as the difference between the first and the second value (λ_measured−λ_exp) and to detect leakage/failure if said error is outside a predefined interval [λ_err−, λ_err+] containing the value zero.

EFFECT: object of the present invention is a system for detecting a leakage in an intake line of an internal combustion engine.

18 cl, 2 dwg