| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic pressure control device of an internal combustion engine capable of raising the temperature of lubricating oil in an early stage while suppressing degradation of the fuel economy. SOLUTION: The hydraulic pressure control device includes a heat exchanger capable of executing the heat exchange between oil lubricating a predetermined operational section of an internal combustion engine and cooling water of the internal combustion engine, an oil pump for supplying the oil to the heat exchanger, and a control means for controlling the operation of the oil pump. The control means estimates the reduction of mechanical losses at the operational section when the temperature of the oil is raised if the temperature of the oil can be raised by operating the oil pump in a warming-up process of the internal combustion engine, the reduction of the estimated mechanical losses is controlled so as not to exceed the work load of the oil pump, and the oil pump is operated to raise the temperature of the oil. COPYRIGHT: (C)2011,JPO&INPIT
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