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US 10,428,731 B2Granted
Method for cleaning continuously variable valve timing system
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorChi-Ho Moon
Life of this patent
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Abstract
A method for cleaning a continuously variable valve timing (CVVT) system for removing foreign materials includes: switching a target operating value of the CVVT system to a predetermined setting value within a set operating region and performing cleaning of the CVVT system; and determining whether a valve timing control learning request exists for the CVVT system, and, when the valve timing control learning request exists, aborting the cleaning.
Claims12
A method for cleaning a continuously variable valve timing (CVVT) system for removing foreign materials, the method comprising steps of:
- switching, by a controller, a target operating value of the CVVT system to a predetermined setting value within a set operating region and cleaning the CVVT system;
- and
- determining, by the controller, whether a valve timing control learning request exists for the CVVT system, and aborting the cleaning when the valve timing control learning request exists,
- wherein, when the cleaning is completed, a counter representing a number of times the cleaning is performed is increased,
- wherein the cleaning is performed a predetermined number of times in a predetermined operating region of the engine,
- wherein, when the number of times the cleaning is performed exceeds the predetermined number of times, the cleaning is aborted for more than a predetermined period of time, and
- wherein, when the cleaning is aborted due to the valve timing control learning request, the number of times the cleaning is performed is not counted.
4 more elements
Dependencies are inferred from the claim text.