| 摘要 |
PURPOSE: A coolant circulation circuit of a car engine is provided to reduce warm-up time by heating a cylinder head through high-temperature coolant, which absorbs heat in a cylinder block flowing into the cylinder head. CONSTITUTION: A coolant circulation circuit of a car engine(20) comprises a first thermostat, a second thermostat and a water pump(28). The coolant heated in the engine is circulated again to the engine by the water pump after circulating through a heater, a radiator(32), a bypass passage and other parts by the first and second thermostat. The coolant pumped up from the water pump is supplied to a cylinder block of the engine and a cylinder engine separately and joins with the coolant heated with circulating through the cylinder block. The mixed cooling water is discharged through one route. |
