Method and system for coolant temperature sensor diagnostics

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United States of America Patent

PATENT NO 10618380
APP PUB NO 20190039437A1
SERIAL NO

15665587

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Abstract

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Methods and systems are provided for on-board diagnostics of components of an exhaust gas heat recovery (EGHR) system including engine coolant temperature sensors coupled to the system. Degradation of one or more of a first coolant temperature sensor coupled upstream of a heat exchanger of the EGHR system and a second coolant temperature sensor coupled downstream of the heat exchanger may be indicated based on a difference between a modeled coolant temperature and a measured coolant temperature, the modeled coolant temperature based on one or more of heat transfer between a heater core and vehicle cabin, and heat transfer between exhaust flowing via the heat exchanger and coolant flowing through the heat exchanger.

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Patent Owner(s)

Patent OwnerAddress
FORD GLOBAL TECHNOLOGIES LLC330 TOWN CENTER DRIVE SUITE 800 DEARBORN MI 48126

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jentz, Robert Roy Westland, US 136 2035
Martinez, Vincent Royal Oak, US 25 87
Rejeti, Sitaram Farmington, US 12 35
Sadahalli, Arjun Natick, US 1 14
Sharma, Sanyam Dearborn, US 9 51

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