The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2008
Filed:
Dec. 27, 2005
Takayoshi Yasuda, Komaki, JP;
Hideki Oshima, Komaki, JP;
Hiroyuki Ichikawa, Kani, JP;
Daichi Mizushima, Anjo, JP;
Takehiko Fushimi, Kariya, JP;
Kenichi Sato, Nagoya, JP;
Takayoshi Yasuda, Komaki, JP;
Hideki Oshima, Komaki, JP;
Hiroyuki Ichikawa, Kani, JP;
Daichi Mizushima, Anjo, JP;
Takehiko Fushimi, Kariya, JP;
Kenichi Sato, Nagoya, JP;
Tokai Rubber Industries, Ltd, Komaki-shi, JP;
Aisin Seiki Kabushiki Kaisha, Kariya-shi, JP;
Abstract
An active vibration insulator includes an electromagnetic actuator, a control-signals generating device, a driver, a calculator, and a judging device. The electromagnetic actuator generates vibrating forces depending on electric-current supplies. The control-signals generating device generates cyclic control signals based on cyclic pulsating signals output from a vibration generating source of a vehicle. The cyclic control signals actively inhibit vibrations generated by the vibration generating source from transmitting to a specific part of the vehicle. The driver drives the electromagnetic actuator by making the electric-current supplies variable based on the cyclic control signals. The calculator calculates an estimated transfer function composed of estimated values of a transfer function for a transfer system including the electromagnetic actuator and the driver. The judging device judges an inoperative malfunction of the electromagnetic actuator based the estimated transfer function.