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:
Mar. 20, 2012
Filed:
Sep. 05, 2008
Applicants:
Koji Matsueda, Toyota, JP;
Junichi Yamaguchi, Kasugai, JP;
Inventors:
Koji Matsueda, Toyota, JP;
Junichi Yamaguchi, Kasugai, JP;
Assignee:
Toyota Jidosha Kabushiki Kaisha, Aichi-Ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01N 13/02 (2010.01);
U.S. Cl.
CPC ...
Abstract
An exhaust silencer device for an internal combustion engine which includes: an exhaust pipe () that forms an exhaust passage from an engine (), and an exhaust opening; and a muffler () attached to the exhaust pipe () so as to silence exhaust sound from the engine (). The piping lengths of the exhaust passages (L, L) on two sides of the muffler () are substantially equal. At least one of the two exhaust passages (L, L) equal in piping length has a hole () that makes the resonance frequencies of the two exhaust passages (L, L) different from each other.