Patent ID: 8083217

Claim:
A Fluid-filled type vibration damping device comprising: a main rubber elastic body connecting a first mounting member and a second mounting member to each other; a pressure-receiving chamber partially defined by a wall of the main rubber elastic body and charged with non-compressible fluid; an equilibrium chamber partially defined by a flexible film and charged with non-compressible fluid; a fluid passage communicating the pressure-receiving chamber with the equilibrium chamber; a movable valve body changing a state of the fluid passage between an opened state and a closed state through a reciprocating motion thereof; a motor rotated in response to an electric current supplied to a motor coil; a cam mechanism installed on a drive force transmitting path from the motor to the movable valve body and transmitting a rotational drive force of the motor to the movable valve body in the form of a reciprocating drive force; a control signal output unit outputting a control signal comprising an ON/OFF signal; a first rotation angle switch connected to the motor coil in series and turned on when a rotation angle of the motor is included within a first angular range and turned off when the rotation angle of the motor is included within a second angular range different from the first angular range; a first control switch connected to the first rotation angle switch in series and turned on when the control signal is an ON signal and turned off when the control signal is an OFF signal; a second rotation angle switch connected to the motor coil in series and connected both to the first rotation angle switch and to the first control switch in parallel and turned on when the rotation angle of the motor is included within a third angular range, and turned off when the rotation angle of the motor is included within a fourth angular range different from the third angular range; and a second control switch connected to the second rotation angle switch in series and connected both to the first rotation angle switch and to the first control switch in parallel and turned on when the control signal is an OFF signal, and turned off when the control signal is an ON signal, wherein the first angular range includes at least the fourth angular range, and the third angular range includes at least the second angular range.