| 摘要 |
PURPOSE:To perform optimum cooling by providing two cooling fans whose rotating numbers are controlled by an engine provided with a radiator for the engine and cooling and by driving a second cooling fan by the value obtained by subtracting the necessary wind quantity for engine radiator from the necessary wind quantity for cooling condenser. CONSTITUTION:In and engine provided with a radiator 40 for an engine 40 and a cooling condenser 28 having an evaporator 36 and a compressor 32, a first and a second cooling fans 22, 26 driven by a second and a first motors 20, 24 whose rotating numbers are controlled by motor control devices 80, 82 are provided. The necessary wind quantity of the condensor 28 is obtained by a first arithmetic means 50 to control the rotating number of the first fan 22 by the motor control device 80. The necessary wind quantity of the radiator 30 is obtained by a second arithmetic means 52, and the wind quantity is calculated by a third arithmetic means 54 and controlled so that the wind quantity obtained by subtracting the wind quantity of the first fan 22 from the necessary wind quantity of the radiator becomes that for the second fan 24. |
