| 摘要 |
An apparatus for changing a coolant passage of an air-conditioner system for a vehicle is provided to temporarily reduce loss of a drive force due to operation of a compressor to increase an engine output. An apparatus for changing a coolant passage of an air-conditioner system for a vehicle includes a bypass line(31), a cylinder(32), a shift valve(38), a resilient means(36), an air flow rate sensor(41), and a controller(40). The bypass line is formed at a low pressure coolant line(23) for flowing coolant from an evaporator to a compressor. The cylinder has a first chamber(34) in communication with the low pressure coolant line, and a second chamber(35) connected to an inlet of the bypass line. The shift valve selects a flow direction of the coolant. The resilient means resiliently supports a piston accommodated in the first chamber. The air flow rate sensor measures an amount of air passing through a radiator grill. The controller controls the shift valve on the basis of variation of the air measured by the sensor.
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