Abnormality diagnosis apparatus and engine cooling system...

Details Abnormality diagnosis apparatus and engine cooling system... Abnormality diagnosis apparatus and engine cooling system...

2007-01-30

2007-01-30

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Cooling

Indicators and safety devices

C123S041050

Reexamination Certificate

active

10642303

ABSTRACT:
A coolant temperature of coolant in a circulation line system is measured through a coolant temperature sensor and is controlled by controlling a flow rate control valve. The flow rate control valve is diagnosed to determine whether abnormality of the flow rate control valve exists based on behavior of the measured coolant temperature, which is measured through the coolant temperature sensor during a warm-up period of an internal combustion engine.

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