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:
Feb. 26, 2019
Filed:
Sep. 24, 2015
Eberspächer Exhaust Technology Gmbh & Co. KG, Neunkirchen, DE;
Ralf Hölsch, Epfendorf, DE;
Michael Pommerer, Uhingen, DE;
Eberspächer Exhaust Technology GmbH & Co. KG, Neunkirchen, DE;
Abstract
A system () for actively controlling sound propagating through exhaust systems () includes a controller (), a sound generator (), in fluid communication with an exhaust system (), and an actuator (), inside the sound generator and receiving a controller control signal for generating sound inside the sound generator to reduce sound inside the exhaust system. The controller identifies an increased exhaust pressure inside the exhaust system based on signals output by an error microphone (), a temperature sensor (), an impedance measuring bridge (), a bus system (), or a water sensor (). The controller interrupts a generation of the control signal and/or interrupts an output of the control signal to the at least one actuator and/or reduces a level of the control signal output to the at least one actuator by at least 30% or at least 60% upon determining a presence of an excessive exhaust gas pressure.