Patent · US Active

Tuning a sound profile of a muffler

US11441456B2 · kind B2 · utility

0Cited by

14References

20Claims

0Family size

Assignee

TOYOTA MOTOR NORTH AMERICA, INC. · US

Inventors

Stephen E. Freeman · McKinney, US
Tyler J. Kass · Harbor Grove, US

Key dates

Filing date	Jul 1, 2019
Grant date	Sep 13, 2022
Priority date	—
Expiry date	Dec 17, 2040

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01N2490/02
WIPO fieldEnvironmental technology
WIPO sectorChemistry

Abstract

Apparatuses and methods for tuning a muffler. An apparatus comprises a housing for a muffler, a first inlet pipe, and a second inlet pipe. The housing includes a coupling chamber. The first inlet pipe has a first set of physical features and carries exhaust to the coupling chamber. The second inlet pipe has a second set of physical features and carries the exhaust to the coupling chamber. The first set of physical features varies from the second set of physical features with respect to at least one physical feature such that a first sound waveform passing through the first inlet pipe and a second sound waveform passing through the second inlet pipe are uniquely tuned to thereby tune an overall sound waveform emitted by the muffler.

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