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:
Apr. 22, 2003
Filed:
Jan. 25, 2002
Harald Stütz, Semriach, AU;
Franz Laimböck, Thal, AU;
AVL List GmbH, Graz, AT;
Abstract
An intake port configuration ( ) for an internal combustion engine wherein the swirl (D) of at least one intake flow entering the combustion chamber via an intake port controlled by an intake valve ( ) can be varied, two or more flow paths are associated with at least one intake port, which paths join in the valve region ( ), and the flow rate (Q) in at least one of the two flow paths is variable by means of a control element ( ), and the two flow paths are constituted by two completely separate intake passages, i.e., a primary passage ( ) and a secondary passage ( ), the primary passage ( ) having a helical form. In order to obtain a high flow rate (Q) at a high swirl level in addition to a wide range over which the swirl D may be varied, the intake valve axis ( ) intersects or is tangent to the secondary passage ( ) at least at one point.