| 摘要 |
PROBLEM TO BE SOLVED: To appropriately perform heating while saving on power when circulating engine cooling water in an engine, an engine radiator, and a heater core by using one electric pump. SOLUTION: In an air conditioner ECU for controlling the operation of the electric pump, the flow rate of the cooling water to the engine radiator is set based on the water temperature, and the flow rate of the cooling water to the heater core is set based on a heating load of the outside temperature (Steps 100, 102). Thereafter, the flow rate of the cooling water demanded in the electric pump is set from the sum of each of the flow rates, and rotational control of the electric pump is made based on the set flow rate (Steps 104-108). In the air conditioner ECU, accurate heating of conditioned air can be performed by the heater core while suppressing the occurrence of insufficient or excessive cooling water flow rate and saving on power when driving the electric pump with such easy processing. COPYRIGHT: (C)2008,JPO&INPIT
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