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:
Jul. 23, 2002
Filed:
Sep. 14, 2000
Stephen F. Bloomer, London, CA;
Siemens VDO Automotive, Inc., Tilbury, CA;
Abstract
An air resonator system for a vehicle has a variable volume to reduce noise expected at both high and low speeds. In one enbodiment, a pair of necks communicate with chamber portions. A valve selectively blocks communication between the chamber portions and allows each of the necks to communicate with the relatively small volume chamber portions. This position is particularly good for reducing the high frequency noise is expected at high engine speeds. The valve is movable to a second position at which it allows communication between the two chamber portions and blocks communication between one of the necks and its respective chamber portion. The relatively large chamber volume provided at this position is particularly well suited for reducing the low frequency noise expected with low engine speed. Thus, a single air resonator system is provided which can be adjusted to accommodate noise at both high and low speeds.