| 摘要 |
PROBLEM TO BE SOLVED: To provide an inspection method of a hydraulic control solenoid valve, which does not need a complicated oil circuit and can even reduce a cost. SOLUTION: In the method that the relation between the electric current and oil pressure change, of the solenoid part 23 of the hydraulic control solenoid valve 22 that the oil passage 21 to solenoid part 23 is formed on the spool 20 driven by the solenoid part 23 in the sleeve 25 that plural input and output ports 12, 13, 14 and drain ports 15, 16 are formed, is inspected, each pipe of 24, 17, 18 and 19 is connected to the input and output ports 12, 13, 14 and drain ports 15, 16. Besides this, the drain ports 15, 16 are formed in the common oil circuit as the common circuit by the common pipe arrangement 19. Closing the oil circuit that is connected to all the ports 13, 14, 15, 16 other than the input port 12 before inspection, the electric power supply to solenoid part 23 is controlled on-off periodically, which characterizes the inspection method of the hydraulic control solenoid valve.
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