| 摘要 |
A coolant circulation circuit of an automobile engine is provided to change a coolant circulation circuit into the inlet control type, to compensate the temperature of an engine by bypassed cooling water temperature even if a bypass passage is cut off by a thermostat, and to prevent a rise in pressure and accumulation of floating matters caused by a stagnant coolant in a bypass passage. In a coolant circulation circuit of an automobile engine for making a coolant heated in an engine(2) to circulate through a heater(6) and other components(8), and then to flow in the engine and making a coolant circulating through a radiator(4) and a coolant circulating through a bypass passage to be controlled by a thermostat(10), even if the bypass passage of a thermostat lower housing is closed by a thermostat under the normal worm-up operation of the engine, the bypass coolant supplied to the bypass passage flows out at the minimum flow rate and mixes with the coolant supplied to other components to make contact with the thermostat and to flow in the engine.
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