(19)
(11) EP 3 128 158 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: 16183020.3

(22) Date of filing: 05.08.2016
(51) International Patent Classification (IPC): 
F02D 41/00(2006.01)
F02D 41/14(2006.01)
(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

(30) Priority: 05.08.2015 IT UB20152917

(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 (EGRLP) 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 a control current (I) of the first sensor (30) and a control current (I) of the second sensor (25); in case the flow of exhaust gases in rich in fuel, updating the control current (I) of the first sensor (30) as a function of the control current (I) of the second sensor (25); and determining the mass flow rate of a low-pressure exhaust gas recirculation EGR circuit (EGRLP) as a function of the control current (I) of the first sensor (30) and a control current (I).