| 摘要 |
PURPOSE: A device for detecting the errors of a solenoid valve is provided to reduce the number of components by detecting the malfunction of a solenoid valve using a distribution voltage due to the resistance of a solenoid coil and the resistance of a switch to replace shunt resistance for monitoring a current and a complex amplifier circuit. CONSTITUTION: A device for detecting the errors of a solenoid valve comprises a switch (10), a solenoid valve (20), a malfunction detection unit (30), a control unit (40), and a malfunction output unit (50). The switch applies a current to a solenoid coil by being switched according to a malfunction detection signal (VT) or a driving signal from the control unit. The solenoid valve is connected to a space between two hydraulic lines (21,22) to regulate hydraulic flow. The solenoid valve comprises a solenoid coil (LS). The malfunction detection unit detects a voltage applied to the solenoid coil to output a detection voltage (VE) to the control unit. The control unit operates the switch through a malfunction detection signal and determines the malfunction of the solenoid valve on the basis of the detection voltage from the malfunction detection unit. The malfunction output unit outputs the malfunction state of the solenoid valve. [Reference numerals] (40) Control unit; (50) Malfunction output unit |
