| 摘要 |
There is provided a cooling system for a liquid-cooled engine wherein the cooling effect exerted by the combination of a pump and a blower is optimized according to the state of the load on the engine so that the necessary cooling effect can be provided by the pump and the blower and that the power consumption can be reduced. In the cooling system, according to the load on the engine, a target cooling water temperature (Tmap) value and a combination of the operation duty ratios of the pump (500) and the blower (230), which produce the target water temperature (Tmap), are formed into a map. In an actual cooling system, when the target water temperature (Tmap) is obtained, the pump and the blower are respectively controlled by the duty ratios so that the sum (Lc) of the power consumptions thereof can be minimized.
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