Patent · US Expired

Air intake pipe for an internal combustion engine

US4197922A · kind A · utility

5Cited by

5References

5Claims

0Family size

Assignee

Volkswagenwerk AG · DE

Inventors

Otto Weber · Wolfsburg, DE
Volkmar Keck · Wolfsburg, DE
Rolf Engelking · Wolfsburg, DE

Key dates

Filing date	Feb 27, 1978
Grant date	Apr 15, 1980
Priority date	—
Expiry date	Feb 27, 1998

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S138/11
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An air intake pipe, for mounting to the air filter of an internal combustion engine has two air flow channels having different lengths. A duct is provided between the air flow channels connecting them over their entire length. The duct is dimensioned to provide both sound attenuation and acoustic wave interference between intake noises in the two channels. Thus, the intake pipe acts as an intake noise silencer.

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