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. 19, 2011
Filed:
May. 25, 2007
Frank Weiss, Pentling/Grasslfing, DE;
Hong Zhang, Tegernheim, DE;
Frank Weiss, Pentling/Grasslfing, DE;
Hong Zhang, Tegernheim, DE;
Continental Automotive GmbH, Hannover, DE;
Abstract
The method and the device serve to adapt the valve characteristic of a fuel injection valve, which has a piezoelectrically driven nozzle needle and by which fuel is injected directly into the combustion chamber of an internal combustion engine, to production-related or age-related variations in the injection behavior. The activation energy and the needle stroke of the fuel injection valve are controlled in such a way that the engine torque in the case of a fuel injection valve with a reference characteristic would not vary. Here, if an actually occurring variation in the engine torque is detected, then by varying the gradient of the activation-energy/valve-stroke characteristic curve of the fuel injection valve, the engine torque is matched to the engine torque generated with an injection valve with a reference characteristic.