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Title: System and method for determining an ammonia generation rate in a three-way catalyst

Patent ·
OSTI ID:1166775
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A system according to the principles of the present disclosure includes a rate determination module, a storage level determination module, and an air/fuel ratio control module. The rate determination module determines an ammonia generation rate in a three-way catalyst based on a reaction efficiency and a reactant level. The storage level determination module determines an ammonia storage level in a selective catalytic reduction (SCR) catalyst positioned downstream from the three-way catalyst based on the ammonia generation rate. The air/fuel ratio control module controls an air/fuel ratio of an engine based on the ammonia storage level.

Research Organization:
GM Global Technology Operations LLC, N/A (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
EE0003379
Assignee:
GM Global Technology Operations LLC (N/A)
Patent Number(s):
8,919,099
Application Number:
13/157,669
OSTI ID:
1166775
Country of Publication:
United States
Language:
English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY