| 摘要 |
PURPOSE:To return a liquid state coolant at cold time of an engine so as to prevent air from mixing, by providing a capped opening part in the upper part of a coolant circulative cooling system using boiling evaporation latent heat and communicating a storage tank to the coolant circulative system. CONSTITUTION:A filler cap 10 is provided in the highest position of a coolant circulative cooling system J using boiling evaporation latent heat, and an external storage tank 12 is communicated to said system J via a shut off valve 11 and cock 17 so that a liquid state coolant may be allowed to flow in and out by a pipe 21 of small diameter from the bottom end as low as possible of a water jacket 18. When an engine is stopped, it begins to cool, causing a vaporized part in a space 19 and a condenser 8 to condense and generating a negative pressure. In this way, an engine key switch 20 being opened ceases electrification of the shut off valve 11 to open the pipe 21, thus sucking the coolant in the storage tank 12 to be returned to the water jacket 18 through the cock 17, shut off valve 11 and the pipe 21. Accordingly, the circulative system J is filled all with the liquid coolant. |
