Active vibration insulator
First Claim
1. An active vibration insulator, comprising:
- a first member attached to an engine;
a second member attached to an engine frame;
a main rubber elastic body elastically connecting the first member and the second member;
a vibratable plate forming a pressure receiving chamber with the main rubber elastic body, the pressure receiving chamber receiving a vibration from the engine;
an electromagnetic actuator including a core, around which a coil is wound, attached to the second member and a plunger attached to the vibratable plate and reciprocating relative to the core, the electromagnetic actuator generating vibrating forces depending on electric-current supplies;
a controller for carrying out vibrating-forces generation control in which the electric-current supplies are made variable so as to actively inhibit vibrations generated by an on-vehicle vibration generating source of a vehicle from transmitting to a specific part of the vehicle based on cyclic pulsating signals output from the on-vehicle vibration generating source, thereby letting the electromagnetic actuator generate the vibrating forces;
an acceleration sensor fixed to the second member and detecting a vibration of the second member; and
a bad-roads processor for judging whether or not the vehicle is traveling on a bad road based on the vibration detected by the acceleration sensor and for stopping the vibrating-forces generation control effected by the controller when the vehicle is judged to be traveling on the bad road.
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Accused Products
Abstract
An active vibration insulator includes an electromagnetic actuator, a controller, and a bad-roads processor. The electromagnetic actuator generates vibrating forces depending on electric-current supplies. The controller carries out vibrating-forces generation control. In the vibrating-forces generation control, the electric-current supplies are made variable so as to actively inhibit vibrations generated by an on-vehicle vibration generating source of a vehicle from transmitting to a specific part of the vehicle based on cyclic pulsating signals output from the on-vehicle vibration generating source. Thus, the controller lets the electromagnetic actuator generate the vibrating forces. The bad-roads processor stops the vibrating-forces generation control effected by the controller when the vehicle travels on bad roads.
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Citations
7 Claims
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1. An active vibration insulator, comprising:
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a first member attached to an engine; a second member attached to an engine frame; a main rubber elastic body elastically connecting the first member and the second member; a vibratable plate forming a pressure receiving chamber with the main rubber elastic body, the pressure receiving chamber receiving a vibration from the engine; an electromagnetic actuator including a core, around which a coil is wound, attached to the second member and a plunger attached to the vibratable plate and reciprocating relative to the core, the electromagnetic actuator generating vibrating forces depending on electric-current supplies; a controller for carrying out vibrating-forces generation control in which the electric-current supplies are made variable so as to actively inhibit vibrations generated by an on-vehicle vibration generating source of a vehicle from transmitting to a specific part of the vehicle based on cyclic pulsating signals output from the on-vehicle vibration generating source, thereby letting the electromagnetic actuator generate the vibrating forces; an acceleration sensor fixed to the second member and detecting a vibration of the second member; and a bad-roads processor for judging whether or not the vehicle is traveling on a bad road based on the vibration detected by the acceleration sensor and for stopping the vibrating-forces generation control effected by the controller when the vehicle is judged to be traveling on the bad road. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification