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:
Nov. 17, 2009
Filed:
Jun. 15, 2004
Toshio Inoue, Tochigi-ken, JP;
Satoru Minowa, Mooka, JP;
Akira Takahashi, Tochigi-ken, JP;
Yoshio Nakamura, Neyagawa, JP;
Masahide Onishi, Osaka, JP;
Toshio Inoue, Tochigi-ken, JP;
Satoru Minowa, Mooka, JP;
Akira Takahashi, Tochigi-ken, JP;
Yoshio Nakamura, Neyagawa, JP;
Masahide Onishi, Osaka, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An active vibratory noise control apparatus reduces vibratory noise which is produced in the passenger compartment of a vehicle based on vibratory noise generated by a variable-cylinder internal combustion engine that can selectively be operated in a full-cylinder operation mode in which all of the cylinders are operated and a partial-cylinder operation mode in which some of the cylinders are out of operation. The active vibratory noise control apparatus has a partial-cylinder operation mode determining circuit for determining whether the variable-cylinder internal combustion engine is in the partial-cylinder operation mode or not. Depending on a determined result from the partial-cylinder operation mode determining circuit, a transistor is turned on or off to switch an amplifying circuit which drives a speaker into and out of operation.