| 摘要 |
PURPOSE:To enhance the starting ability of an internal combustion engine, by stopping the operation of a cooling water pump when the internal-combustion engine is under a low temperature condition and as well by heating intake air by means of a heat exchanger through which cooling water is circulated, so that evaporation is promoted. CONSTITUTION:When the temperature of cooling water which is detected by a water temperature sensor 36 is lower then a predetermined value (about 50 deg.C) upon engine starting, selector valves 23, 27 are changed-over to a first switching mode, and as well a shut-off valve 33 is closed. Further, a cooling water pump 25 is stopped since a motor 31 is ceased, and all cooling water discharged from a water jacket 15 flows into a bypass conduit pipe 21 due to the closing of a thermostat valve 17. Thereafter, cooling water flows to a heat-exchanger 6 through a conduit pipe 34, the selector valve 23 and a conduit pipe 22, and then, flows to a cooling water pump 16 through a conduit pipe 26, the selector valve 27 and a conduit pipe 35 after the evaporation of fuel is carried out with the use of the heat of intake air. Cooling water is then returned to the jacket 15 from the pump 16. |
