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. 05, 1992
Filed:
Jan. 28, 1991
Yuuji Maeda, Katsuta, JP;
Yozo Nakamura, Shimoinayoshi, JP;
Kenichi Nakamura, Katsuta, JP;
Masahide Sakamoto, Katsuta, JP;
Yuzo Kadomukai, Shimoinayoshi, JP;
Masao Fukushima, Machida, JP;
Kei Murakami, Zama, JP;
Hitachi, Ltd., Chiyoda, JP;
Nissan Motor Co., Ltd., Kanagawa, JP;
Abstract
A method of reducing vibrations of a car body comprises a step of detection of rough which is irregular combustion in an engine, preferably through monitoring of angular velocity of a crankshaft of the engine, and a step of exerting such external force as will cancel roll vibrations of the engine caused by the rough on an engine block of the engine temporarily after the occurrence of the rough. A magnitude of the force and timing of exerting the force is preferably determined on the basis of a degree of the rough and the angular velocity immediately before the occurrence of the rough.