Refrigeration – Automatic control – Of external fluid or means
Reexamination Certificate
2004-02-25
2008-03-18
Norman, Marc (Department: 3744)
Refrigeration
Automatic control
Of external fluid or means
C236S034000, C123S041150
Reexamination Certificate
active
07343752
ABSTRACT:
When a temperature of cooling water detected by a water temperature sensor is, for instance, higher than, or equal to degrees, and is smaller than degrees, an abnormal state judging unit judges that an engine is under semiwarming-up condition, and then forcibly drives an electric motor fan so as to forcibly cool cooling water contained in a radiator. After the abnormal state judging unit has forcibly driven the electric motor fan, this abnormal state judging unit calculates a difference between the cooling water temperature detected by the water temperature sensor and a predicted cooling water temperature. When the calculated temperature difference is smaller than a predetermined abnormal state judging value, the abnormal state judging unit judges that a thermostat provided in a cooling water circulating path is brought into an abnormal valve opening state.
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patent: A 2000-274300 (2000-10-01), None
Fujitsu Ten Limited
Norman Marc
Oliff & Berridg,e PLC
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