| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a water-cooling structure capable of significantly improving fuel consumption by efficiently using a water pump.SOLUTION: In a water-cooling structure in which a water channel 5 (second water channel) through a radiator is closed by an operation of a thermostat 4, and a water channel 10 (third water channel) for directly returning cooling water 2 from an engine, to the water pump from the thermostat 4 without passing through the radiator, is opened, when a temperature of the cooling water 2 guided from the engine through a water channel 3 (first water channel) is low, a downstream-side end of a water channel 21 (forth water channel) for guiding the cooling water 2 by another system, is opened just behind a water outlet 18 of the thermostat 4 communicated with the water channel 10, and the cooling water 2 jointed from the downstream-side end of the water channel 21 can be led in by utilizing pressure fall generated just behind the water outlet 18 of the thermostat 4.</p> |
