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:
Jun. 02, 2009
Filed:
Sep. 29, 2005
Shintarou Okawa, Aichi-ken, JP;
Tomoyuki Sawatari, Aichi-ken, JP;
Yoshikazu Hirose, Aichi-ken, JP;
Minoru Toyoda, Aichi-ken, JP;
Masaru Hattori, Aichi-ken, JP;
Tatsuo Suzuki, Aichi-ken, JP;
Hiroshi Iwao, Aichi-ken, JP;
Yutaka Ogasawara, Aichi-ken, JP;
Shintarou Okawa, Aichi-ken, JP;
Tomoyuki Sawatari, Aichi-ken, JP;
Yoshikazu Hirose, Aichi-ken, JP;
Minoru Toyoda, Aichi-ken, JP;
Masaru Hattori, Aichi-ken, JP;
Tatsuo Suzuki, Aichi-ken, JP;
Hiroshi Iwao, Aichi-ken, JP;
Yutaka Ogasawara, Aichi-ken, JP;
Toyoda Gosei Co., Ltd., Aichi-pref., JP;
Abstract
A resonator is arranged in an intake system including a pipe section for partitioning an intake port from an intake passage that communicates the intake port with a combustion chamber of an engine, the resonator including: a branch pipe having one end branching to the pipe section and the other end closed so that a silencing chamber is defined therein; and at least one partition wall for partitioning the silencing chamber into at least one pneumatic spring chamber, the partition wall having a natural frequency lower than the frequency of silencing target sound of intake noise propagated from the intake passage.