| 摘要 |
PURPOSE:To obtain rapid rise of heating immediately after starting by constituting to control change-over of a cross valve provided among a heater core, water pump and a reservoir tank and control a drive pump by cooling liquid temperature. CONSTITUTION:Cooling liquid temperature is detected by a cooling liquid temperature detecting means 18 and input in a control circuit 23. The control circuit 23 compares cooling liquid temperature with a set value and when the cooling liquid temperature is over the set value, a drive intermitting means 20 of a water pump 19 is connected and a core change-over value 14 is changed over to be communicated to a heater core 3 and the absorption side of the water pump 19 to stop a cooling liquid motor pump 17. When the liquid temperature is below the set value, the intermitting means is disconnected and the cross change-over value 14 is changed over to the heater core and a reservoir tank 15 communicating side to drive the motor pump 17. Then while the cooling liquid temperature is low immediately after starting, the cooling liquid is heated rapidly in a water jacket, and rise of heating can be made quick. |
