Methods and systems for exhaust gas mixing

Details Methods and systems for exhaust gas mixing Methods and systems for exhaust gas mixing

2011-05-17

2011-05-17

Vo, Hieu T (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C060S605200, C123S568230

Reexamination Certificate

active

07945377

ABSTRACT:
A method of operating an engine system is described in which a back-pressure valve of a low pressure EGR system can be modulated at a lower frequency during an EGR operation, and at a higher frequency when additional exhaust gas sensing is requested. Back-pressure valve modulation can therefore be used to promote exhaust gas mixing while providing EGR. Exhaust gas constituents in the mixed exhaust gas can then be sensed with higher accuracy by downstream exhaust gas sensors.

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