Patent Number: 8,584,515

Title: Method and control unit for operating an injection valve

Abstract: In a method for operating an injection valve, in particular a fuel injector of an internal combustion engine of a motor vehicle, one component of the injection valve, particularly a valve needle, is disposed in a manner allowing movement relative to other components of the injection valve, and preferably is able to be driven at least partially by an actuator. A structure-borne-noise signal is detected by a structure-borne-noise sensor, and the structure-borne-noise signal is evaluated in order to infer an operating state of the movably disposed component.

Inventors: Fischer; Wolfgang (Gerlingen, DE), Seuling; Silke (Kornwestheim, DE), Grosse; Christian (Kornwestheim, DE), Kemmer; Helerson (Vaihingen, DE), Haeming; Werner (Neudenau, DE)

Assignee: Robert Bosch GmbH

International Classification: G01M 15/04 (20060101)

Expiration Date: 1/19/12018