| 摘要 |
<p>The circuit (2) for a solenoid valve (1) of proportional type having a control solenoid or winding (3) comprises a pilot circuit (8) operable, when it receives an activation signal (V), to couple the winding (3) to a source of DC voltage (B); a sensor (11, 12) for sensing the current (IEV) flowing in the winding (3); a comparison circuit (13) connected to the sensor (11, 12) to compare the current (IEV) flowing in the winding (3) with a threshold value (IS), and a control circuit (6) which causes activation of the solenoid valve (1) by providing the pilot circuit (8) with successive activation and disactivation signals, the activation signals (V1, V2) being provided as long as the current (IEV) detected by the sensor (11) is less than the threshold value (IS), the disactivation signals having a predetermined duration (TOFF) <IMAGE></p> |
