Patent · US Active

Overload protection for loudspeakers in exhaust systems

US9084039B2 · kind B2 · utility

0Cited by

12References

22Claims

0Family size

Assignee

Eberspächer Exhaust Technology GmbH · DE

Inventors

Uwe Schumacher · Soest, DE
Christof Luecking · Wetter, DE
Manfred Nicolai · Eßlingen, DE

Key dates

Filing date	Nov 1, 2012
Grant date	Jul 14, 2015
Priority date	—
Expiry date	Jan 10, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04R2499/13
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

A method for controlling an anti-sound system includes measuring sound within an exhaust system of a vehicle, calculating a control signal based on the measured sound, calculating a thermal load to be expected of the at least one loudspeaker of the anti-sound system during operation with a control signal based on a mathematical model of a thermal behavior of the loudspeaker and/or a mechanical load to be expected of the at least one loudspeaker of the anti-sound system based on a mathematical model of a mechanical behavior the loudspeaker, comparing the calculated thermal and/or mechanical load with a specified maximum load, operating the loudspeaker with the control signal, if the calculated thermal and/or mechanical load is smaller than or equal to the maximum load, and changing the spectrum of the control signal, in order to receive a corrected control signal, if the calculated load is greater than the maximum load.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.