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:
Dec. 23, 2003
Filed:
Apr. 22, 2002
Volkswagen AG, , DE;
Abstract
A method for operating an internal combustion engine with at least one working piston with a variable compression ratio, which can be changed as a function of an operating state of the internal combustion engine, the method including the steps of: detecting, with a knock sensor, when the compression ratio is too high; reducing the compression ratio (V) when the knock limit (L) is at least reached by a first, predetermined value (V ), which is a function of the operating state, over a first, predetermined time period (t -t ); subsequently increasing the compression ratio (V) by a second, predetermined value (V ) over a second, predetermined time period (t -t ) until the knock limit (L) is at least reached again; and determining at least one of the first predetermined value (V ), the first time period (t -t ), the second predetermined value (V ), and the second time period (t -t ) as a function of load demand on the internal combustion engine.