Patent · US Expired

Device for modulating noise in a motor vehicle

US7377359B2 · kind B2 · utility

13Cited by

13References

8Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Marcus Hofmann · Stuttgart, DE
Sascha Rossa · Baltmannsweiler, DE
Roudolf Starobinski · Hamburg, DE

Key dates

Filing date	Jan 10, 2006
Grant date	May 27, 2008
Priority date	—
Expiry date	Apr 29, 2026

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01N13/017
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

In a device for noise configuration in a motor vehicle which has an internal combustion engine with at least two gas conduits connected to different cylinders of the engine, the gas conduits are interconnected by means of a cross-flow section formed by a housing which encloses the gas conduits and which has at least two chambers in each of which one of the gas conduits is disposed, each of the gas conduits being in communication with the respective chamber by which it is enclosed by means of a respective cross-flow opening and the two chambers being in communication with one another by means of at least one cross-flow opening which is remote from the cross-flow openings of the gas conduits so as to provide for a phase shift of the sound waves of the gas flowing through the housing.

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