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:
Mar. 25, 1997
Filed:
Apr. 29, 1996
Wolfgang Widmann, Erdmannhausen, DE;
Mercedes-Benz AG, Stuttgart, DE;
Abstract
The invention relates to a device for controlling the air flow of a supercharged internal combustion engine with a supercharger to deliver charge air from a suction line located upstream of the supercharger through a charge air line located downstream of the supercharger to the internal combustion engine. The suction line includes an intake and a recirculating line with a recirculating valve located between the charge air line and the suction line. The recirculating line between the recirculating valve and the suction line is formed by a line section that terminates in the suction line of the supercharger downstream of the intake. In order to achieve a significant reduction of induction noise, the length of the line section from the recirculating valve to the opening in the suction line is dimensioned as a function of a presettable pulsation frequency of the supercharger so that the line section, with the recirculating valve closed, forms a resonator that is tuned to one or more pulsation frequencies of the supercharger.