The invention provides a vehicle cooling system which can restrain error starting of an electric oil pump at a low oil temperature due to an error between an oil temperature detection value detected by an oil temperature sensor and an oil temperature of a part where the electric oil pump actually sucks oil. The temperature of the oil in an oil circulation circuit (72) in which oil is circulated byan electric oil pump (80) is detected by an oil temperature sensor (92). Furthermore, the temperature of the refrigerant in a refrigerant circulation circuit (74) connected to an oil cooler (84) thatcools the oil by the heat exchange with the refrigerant is detected by a refrigerant temperature sensor (118). When both the oil temperature detection value of the oil temperature sensor (92) and therefrigerant temperature detection value of the refrigerant temperature sensor (118) are higher than a predetermined low-temperature start determination value, the oil temperature detection value of the oil temperature sensor (92) and the refrigerant temperature detection value of the refrigerant temperature sensor (118) are determined to be lower than the predetermined low-temperature start determination value. Since the startup of the electric oil pump is permitted, the accuracy of determination of startup permission based on the oil temperature becomes higher, and it is possible to suppressthe erroneous startup of the electric oil pump (80) at the low oil temperature.
本发明提供一种车辆的冷却系统,其能够抑制因由油温传感器检测到的油温检测值和电动式机油泵实际吸入油的部分的油温之间的误差而在低油温时使电动式机油泵错误地启动的情况。利用电动式机油泵(80)而使油进行循环的油循环回路(72)内的油的温度由油温传感器(92)检测出,并且,和通过与制冷剂的热交换而对油进行冷却的机油冷却器(84)连接的制冷剂循环回路(74)内的制冷剂温度由制冷剂温度传感器(118)检测出,在油温传感器(92)的油温检测值以及制冷剂温度传感器(118)的制冷剂温度检测值均与被预先确定的低温启动判断值相比而较高的情况下,电动式机油泵的启动被许可,因此,基于油温的启动许可的判断精度变高,从而能够抑制在低油温时电动式机油泵(80)被错误地启动的情况。
Vehicle cooling system
车辆的冷却系统
2020-04-17
Patent
Electronic Resource
Chinese