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:
Jan. 05, 1993
Filed:
Apr. 20, 1992
Stephen E Brackett, Blenheim, CA;
Siemens Automotive Limited, Chatham, CA;
Abstract
Two speakers are mounted on an engine air induction system to broadcast respective pressure waves into the induction system. One speaker is near the junction of a runner and a plenum. The other is near the outside air intake. Both speakers are driven by electronic circuitry. The one speaker is driven to introduce a pressure wave that reinforces the portion of a pressure wave from an engine cylinder that is reflected back toward the cylinder by the impedance change that exists at the runner/plenum junction, thereby augmenting the charge introduced into the cylinder. The other speaker is driven to cancel the combined pressure waves that travel toward the air intake and is itself sufficiently close to the air intake that the pressure wave that it emits through the air intake has substantially less energy content than would be the case if such cancellation were not conducted.