| 摘要 |
PURPOSE:To provide a damping force regulation type hydraulic buffer to maintain excellent characteristics and suppress the generation of oil impact noise. CONSTITUTION:A pulse signal generating circuit 33 is provided for being connected to a source circuit 4 connected to a solenoid valve 1 and applying a pulse-form electric signal on a coil 24 by outputting a pulse signal G to the source circuit 4 when energization to the coil 24 is started or completed. During the starting or completion of energization to the coil 24, a pulse signal is outputted to the source circuit 4 by a pulse signal generating circuit 33 to apply a pulse-form electric signal to the coil 24. Since, after a lapse of a time T1, a plunger 25 is operated each time an electric signal is inputted, a switch time of a damping force is lengthened. Thereby, oil impact noise is suppressed from generation. Further, since a switch time of a damping force is prolonged without varying coil resistance and inductance, waste time is prevented from prolongation to maintain excellent characteristics. |
