METHOD TO CONTROL A LOW-PRESSURE EXHAUST GAS RECIRCULATION EGR CIRCUIT IN AN INTERNAL COMBUSTION ENGINE

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EP 3 128 159 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A1)

(48)	Corrigendum issued on:
	28.06.2017 Bulletin 2017/26

(88)	Date of publication A3:
	08.02.2017 Bulletin 2017/06

(43)	Date of publication:
	08.02.2017 Bulletin 2017/06

(21)	Application number: 16183039.3

(22)	Date of filing: 05.08.2016

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International Patent Classification (IPC):

F02D 41/00^(2006.01)
F02D 41/14^(2006.01)

F02D 41/04^(2006.01)
F02M 26/06^(2016.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME
	Designated Validation States:
	MA MD

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Priority:

05.08.2015 IT UB20152868

(71)	Applicant: Magneti Marelli S.p.A.
	20011 Corbetta (MI) (IT)

(72)	Inventor:
	PANCIROLI, Marco 40100 BOLOGNA (IT)

(74)	Representative: Studio Torta S.p.A.
	Via Viotti, 9 10121 Torino 10121 Torino (IT)

(54)	METHOD TO CONTROL A LOW-PRESSURE EXHAUST GAS RECIRCULATION EGR CIRCUIT IN AN INTERNAL COMBUSTION ENGINE

(57) A method to determine the mass flow rate of a low-pressure exhaust gas recirculation EGR circuit (EGR_LP) of an internal combustion engine (1) comprising a first linear sensor (30) to measure the quantity of oxygen available in the mixture of fresh air taken in and exhaust gases flowing through the intake pipe (6) and a second linear sensor (25) to measure the quantity of oxygen available in the flow of exhaust gases; the method comprises the steps of determining the air/fuel equivalence ratio (λ) of the exhaust gases by means of the second sensor (25); in case the exhaust air/fuel equivalence ratio is rich, calculating the percentage (O_2real) of total oxygen contained in the mixture flowing through the intake pipe (6) as a function of the air/fuel equivalence ratio (λ) of the exhaust gases determined by means of the second sensor (25) and of the percentage (O₂) of oxygen determined by means of the first sensor (30).