Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – With indicator or control of power plant
Reexamination Certificate
2011-01-25
2011-01-25
Cronin, Stephen K (Department: 3747)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
With indicator or control of power plant
C123S506000, C073S114380, C702S185000
Reexamination Certificate
active
07877194
ABSTRACT:
A solenoid valve includes cyclically energizing and deenergizing a solenoid of the solenoid valve to repeatedly fully open and fully close the solenoid valve. When the energizing and deenergizing causes collisions of a moving member of the solenoid valve against at least one of a first and a second seat formed in a housing of the solenoid valve, noises are thus generated by the collisions and occurrence intervals of the noises are detected. Whether the solenoid valve is in normal or abnormal condition is diagnosed based on the detected occurrence intervals of the noises.
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Cronin Stephen K
Denso Corporation
Nixon & Vanderhye PC
Vilakazi Sizo B
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