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. 05, 2007
Filed:
Sep. 28, 2005
Kazuhiro Akima, Wako, JP;
Yoshiyuki Umino, Wako, JP;
Kazuhiro Akima, Wako, JP;
Yoshiyuki Umino, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
In an intake system for an engine incorporated with a resonance chamber (), a variable communication unit () for controlling the communication between an intake passage with the resonance chamber comprises an outer tube () having an open axial end () and an opening () defined in a circumferential wall thereof for communication with the resonance chamber and an inner tube () rotatably and coaxially received in the outer tube, the inner tube being provided with a communication inlet port () at an axial end on a same side as the axial end of the outer tube and an opening () in a circumferential wall thereof for defining a communication outlet port () jointly with the opening in the outer circumferential wall of the outer tube. The openings of the inner tube and outer tube are configured such that at least one of a distance (L) between the inlet and outlet ports of the communication passage and an opening area (S) of the communication outlet port changes in relation with a relative rotational angle between the inner tube and outer tube. Thereby, the intake system can be formed as a highly compact unit and requires little power to operate.