Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hajime Hosoya0
Date of Patent
October 17, 2006
0Patent Application Number
109428150
Date Filed
September 17, 2004
0Patent Primary Examiner
Patent abstract
An air pump is driven under a condition where a check valve is not opened, and an occurrence of failure in the check valve and the air pump is diagnosed based on a driving load of the air pump or a pressure upstream of the check valve or a pressure downstream of the check valve at the time.
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