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AssigneeHitachi Automotive Systems, Ltd.
InventorsAtsushi MURAI, Shigeyuki SAKAGUCHI, Yuichi TOYAMA
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A cooling system of an internal combustion engine includes a flow channel switching valve for sequentially switching between a plurality of cooling water passages so as to distribute cooling water to at least one cooling water passage. When a control device for the cooling system switches between the cooling water passages by controlling the flow channel switching valve in accordance with the progress of warm-up of the internal combustion engine, the control device suppresses the distribution rate of the cooling water to the cooling water passage to which the distribution of the cooling water is just started.
-15. (canceled)
A control device for a cooling system of an internal combustion engine, the control device comprising a processor which controls a flow channel switching valve for switching between a plurality of cooling water passages so as to sequentially change at least one cooling water passage to which cooling water is distributed in accordance with progress of warm-up of the internal combustion engine, wherein the processor is configured to, when switching between the cooling water passages, gradually increase, over a predetermined time to a target value, a distribution rate of the cooling water to the cooling water passage to which the distribution of the cooling water is just started, and temporarily stop increasing the distribution rate of the cooling water to the cooling water passage during process of gradually increasing the distribution rate of the cooling water to the cooling water passage.
A control method for a cooling system of an internal combustion engine wherein a control device controls a flow channel switching valve for switching between a plurality of cooling water passages so as to sequentially change at least one cooling water passage to which cooling water is distributed in accordance with progress of warm-up of the internal combustion engine, and, when switching between the cooling water passages, the control device gradually increases, over a predetermined time to a target value, a distribution rate of the cooling water to the cooling water passage to which the distribution of the cooling water is just started, and temporarily stops increasing the distribution rate of the cooling water to the cooling water passage during process of gradually increasing the distribution rate of the cooling water to the cooling water passage.
Dependencies are inferred from the claim text.