Dedicated exhaust gas recirculation control systems and methods

Sczomak, David P.; Narayanaswamy, Kushal; Keating, Edward J.

Title: Dedicated exhaust gas recirculation control systems and methods

Patent · Tue May 01 00:00:00 EDT 2018

OSTI ID:1438407

Sczomak, David P.; Narayanaswamy, Kushal; Keating, Edward J.

An engine control system of a vehicle includes a fuel control module that controls fuel injection of a first cylinder of an engine based on a first target air/fuel ratio that is fuel lean relative to a stoichiometric air/fuel ratio and that controls fuel injection of a second cylinder of the engine based on a second target air/fuel ratio that is fuel rich relative to stoichiometry. The first cylinder outputs exhaust to a first three way catalyst (TWC), and the second cylinder outputs exhaust to an exhaust gas recirculation (EGR) valve. An EGR control module controls opening of the EGR valve to: (i) a second TWC that reacts with nitrogen oxides (NOx) in the exhaust and outputs ammonia to a selective catalytic reduction (SCR) catalyst; and (ii) a conduit that recirculates exhaust back to an intake system of the engine.

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Research Organization:: GM Global Technology Operations LLC, Detroit, MI (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: EE00006853

Assignee:: GM Global Technology Operations LLC (Detroit, MI)

Patent Number(s):: 9,957,911

Application Number:: 15/046,580

OSTI ID:: 1438407

Resource Relation:: Patent File Date: 2016 Feb 18

Country of Publication:: United States

Language:: English

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