Method for cold start emissions diagnostic

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United States of America Patent

PATENT NO 10352223
APP PUB NO 20190072019A1
SERIAL NO

15698093

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Abstract

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A method for cold start emissions diagnostic of a catalytic treatment device of an internal combustion engine includes determining a torque reserve; determining a catalyst light off (CLO) state; integrating the total torque reserve over a time period established by the CLO state; determining if a value from the integration exceeds an integration threshold; and if the value from the integration exceeds the integration threshold, indicating that the cold start emissions diagnostic is positive.

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Patent Owner(s)

Patent OwnerAddress
GM GLOBAL TECHNOLOGY OPERATIONS LLCP O BOX 300 MAIL CODE 482-C23-B21 DETROIT MI 48265-3000

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ramappan, Vijay A Novi, US 8 20
Wu, Zhijian J Rochester Hills, US 6 28
York, Gregory J Fenton, US 17 203

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