Methods and system for diagnosing active exhaust valves based on temperature and thermal image data
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United States of America Patent
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May 25, 2021
Grant Date -
Oct 8, 2020
app pub date -
Apr 4, 2019
filing date -
Apr 4, 2019
priority date (Note) -
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Abstract
Methods and systems are provided for diagnosing an active exhaust valve in an exhaust system based on thermal data. In one example, a method may include indicating degradation of a first active exhaust valve positioned in a first exhaust pipe of a first engine bank based on a difference between a first temperature of exhaust downstream of the first active exhaust valve and a second temperature of exhaust downstream of a second active exhaust valve positioned in a second exhaust pipe of a second engine bank. Degradation of the valve may be confirmed based on thermal image data acquired at outlets of the first and second exhaust pipes.
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