| 摘要 |
PURPOSE:To improve cooling ability and prevent heat problems in an engine room by opening a cover of a hood while improving cooling effect of a condenser at the idling rotation of the engine or at the time of traffic jam. CONSTITUTION:An air-hole 19 is formed on a hood 15 of an engine room, while a cover 20 for opening and closing the air-hole 19 by the motor 10 is provided. A pressure switch 9 which is set ON when a discharge pressure of an air conditioning cooling medium exceeds a predetermined value is connected to a motor 10, while a coil 11 of a relay 5 is connected parallelly to the motor 10. An opening contact 14 of the relay 5 is connected to an intermediate tap of a resistor 4 serially connected to an air conditioning switch 2. When the pressure switch is set ON, the cover 20 is automatically opened and further, the resistance value of the resistor 4 is reduced to accelerate the rotation of a motor 6. The blowing rate of a fan 7 is increased to improve the cooling effect of a condenser 8. |
