Back to results
US 12,051,834 B2Granted
Device for diagnosing valve failure of fuel cell system
AssigneesHyundai Motor Company, Kia Corporation
InventorsJong Gyun Kim, Seong Cheol Jeong
Life of this patent
Estimating the term…
Abstract
A device for diagnosing a valve failure of a fuel cell system is capable of accurately and quickly determining whether an integrated valve in a fuel cell system is operated abnormally, and preventing problems caused by the operation abnormality of the integrated valve.
Claims11
A device for diagnosing a valve failure of a fuel cell system, the device comprising:
- a water trap configured to store water and hydrogen discharged from a fuel cell stack;
- an integrated valve configured to open or close a passage through which the water and the hydrogen stored in the water trap are discharged;
- and
- a controller configured to enter the integrated valve into a forced driving mode when the controller commands an opening operation of the integrated valve and determines that the integrated valve is not open based on an instantaneous rate of change of a drive current for operating the integrated valve, and further configured to determine that the integrated valve fails when the integrated valve is not open after the integrated valve is entered into the forced driving mode.
1 more element
Dependencies are inferred from the claim text.