| 摘要 |
Provided is a coolant-control valve that is able to perform the initialization learning using a stopper and to provide an efficient structure, by providing an initialization learning stopper within an actuator which drives a valve body. The coolant-control valve is equipped with a rotor that is driven to control a flow rate of coolant for cooling an engine, a casing that houses the rotor, and a rotary drive device 3 that drives the rotor. Control means of the rotary drive device 3 has an initialization learning function of an operating range of the rotor. The rotary drive device 3 is equipped with a motor 33 and a reductiongear 34. The operating range of the rotor is restricted, by restricting the operating range of an output gear 41 among power transmission elements provided in the reduction gear 34. Furthermore, a groove 43 of the output gear, and a fixed-angle stopper 44 inserted into the groove 43 are provided as restricting means for use during initialization learning by the control means. |
