Method and control unit for determining and / or adjusting the EGR rate of an EGR system

By calibrating the EGR rate model using lambda sensor data during overrun mode, the EGR system achieves precise and cost-effective control, addressing accuracy and cost issues in existing systems.

DE102016211311B4Active Publication Date: 2026-06-03BAYERISCHE MOTOREN WERKE AG
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
BAYERISCHE MOTOREN WERKE AG
Filing Date
2016-06-23
Publication Date
2026-06-03

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Abstract

Method (200) for determining and / or adjusting an actual quantity of recirculated exhaust gases (122) that is recirculated from an outlet (132) of an internal combustion engine (103) to an inlet (131) of the internal combustion engine (103); wherein the method (200) comprises, - Determining (201) a first point in time at which the internal combustion engine (103) is in overrun mode; - Acquisition (202) of sensor data relating to the chemical composition of exhaust gases (122) at the outlet (132) of the internal combustion engine (103) at the first time point; and - Determining (203) information regarding the actual quantity of recirculated exhaust gases (122) and / or adjusting (203) the actual quantity of recirculated exhaust gases (122) based on sensor data.
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Citation Information

Patent Citations

  • Method for operating internal combustion engine, involves recirculating exhaust gas, in which air is fed to combustion chamber over suction pipe partly closed by adjustment device

    DE102007009689A1

  • System and method for estimating and controlling cylinder air charge in a direct injection internal combustion engine

    DE10349490A1

  • Method and device for controlling the exhaust gas recirculation of an internal combustion engine

    DE19941007A1