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:
May. 12, 1992
Filed:
Feb. 01, 1991
Shigeru Kuriyama, Katsuta, JP;
Yuji Maeda, Katsuta, JP;
Yozo Nakamura, Ibaraki, JP;
Kenichi Nakamura, Katsuta, JP;
Keiichi Mashino, Katsuta, JP;
Yuzo Kadomukai, Ibaraki, JP;
Masao Fukushima, Machida, JP;
Kei Murakami, Zama, JP;
Hitachi, Ltd., Tokyo, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
An apparatus induces vibrations in a generator for effectively reducing vibrations of a vehicle engine and the vehicle body due to irregular combustion of the engine. The load torque of a generator fixed to the engine is changed to generate an angle moment on the body of the generator to cancel engine vibrations due to rough idling and suppress body vibrations due to the rough idling. Irregular combustion of the engine is detected from a change in the engine speed, and a voltage higher than the output voltage of the generator is than applied across the field winding to increase the field winding current and hence the load torque on the generator, which induces vibrations on the generator body. When the generator vibrations and vibrations due to irregular combustion are in inverse phase relationship to each other, they are cancelled.