Automatic temperature and humidity regulation – Thermostatic – With indicator or alarm
Patent
1999-12-21
2000-12-19
Tanner, Harry B.
Automatic temperature and humidity regulation
Thermostatic
With indicator or alarm
236 345, 165 111, 123 4109, F01P 716
Patent
active
061617679
ABSTRACT:
A method of sensing failure of a thermostat in a vehicle comprises the steps of sensing signals from various kinds of sensors after starting of the engine, and determining whether the signals are normal; determining whether the amount of intake air among the sensed signals from the sensors in the above step is larger than the amount of intake air during a predetermined period; accumulating the elapsed time by a given time at every predetermined time depending on the determination in the above step; determining whether the accumulated time obtained in the above step has reached a predetermined time for determining the failure; sensing the temperature of the coolant when the accumulated time in the above step has reached the predetermined time for determining the failure, and determining whether the sensed temperature of the coolant is below a predetermined temperature of the coolant; and indicating failure alarm when the sensed temperature of the coolant in the above step is below the predetermined temperature of the coolant, thereby previously preventing overheat of an engine in the vehicle by sensing the failure of the thermostat which opens and closes a coolant passage depending on the temperature of the coolant for cooling the engine.
REFERENCES:
patent: 4381549 (1983-04-01), Stamp, Jr. et al.
patent: 4432210 (1984-02-01), Saito
patent: 5115643 (1992-05-01), Hayata et al.
patent: 5123252 (1992-06-01), Hanson
Hyundai Motor Company
Tanner Harry B.
LandOfFree
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