초록 ▼

A cooling control system by which an internal combustion engine is prevented from overheating, and a fail-safe function exerts its effect. A butterfly valve 34b for regulating the flow of cooling water is rotated by a motor 31, a clutch mechanism 32, and a speed reduction mechanism 33, thereby cooli

A cooling control system by which an internal combustion engine is prevented from overheating, and a fail-safe function exerts its effect. A butterfly valve 34b for regulating the flow of cooling water is rotated by a motor 31, a clutch mechanism 32, and a speed reduction mechanism 33, thereby cooling the engine to be at the most suitable temperature for driving. The aforesaid butterfly valve 34b is given momentum in a direction to open the valve 34b by a return spring 34e. For example, an angle sensor 34g for detecting the rotational angle of the butterfly valve 34b is included. In a computing unit, when it is determined that an abnormality occurs from the relationship between the data from an encode 34g and the temperature of the cooling water, the clutch mechanism 32 is released, and the butterfly valve 34b is automatically opened. Accordingly the engine is prevented form overheating.

대표청구항 ▼

[ What is claimed is:] [1.] A cooling control system for an internal combustion engine, having a configuration in which a circulating passage for a cooling medium is formed between a fluid conduit formed in an internal combustion engine and a fluid conduit formed at a heat exchanger, and in which he

[ What is claimed is:] [1.] A cooling control system for an internal combustion engine, having a configuration in which a circulating passage for a cooling medium is formed between a fluid conduit formed in an internal combustion engine and a fluid conduit formed at a heat exchanger, and in which heat produced in the internal combustion engine is radiated by said heat exchanger by circulating the cooling medium in said circulating passage, comprising:a control unit for producing a control signal in response to a detection signal from at least one detecting sensor for detecting the driving condition of the internal combustion engine;a motor rotationally driven based on a control signal from said control unit;a speed reduction mechanism for reducing the rotational speed of said motor;a flow control valve which is opened and closed by the rotational driving force obtained from said speed reduction mechanism, and which controls the flow of the cooling medium in the circulating passage between said internal combustion engine and said heat exchanger;a return spring for giving momentum to said flow control valve in a valve opening direction; anda clutch mechanism coupling said motor and said speed reduction mechanism, which releases the coupling from said motor and said flow control valve when obtaining the output of the detection of an abnormality in said internal combustion engine.