Patent · US Active

Method of operating a fuel injector

US7905136B2 · kind B2 · utility

2Cited by

2References

22Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Kai Sutter · Stuttgart, DE
Oliver Becker · Ludwigsburg, DE

Key dates

Filing date	Jul 22, 2008
Grant date	Mar 15, 2011
Priority date	—
Expiry date	Aug 14, 2029

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02D2200/0614
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method for operating an injection valve, in particular a fuel injector of an internal combustion engine, in which a trigger voltage is able to be applied to an actuator, designed as piezoelectric element, of the fuel injector in order to induce an injection of fluid, in particular fuel, supplied to the fuel injector via a supply system. A specifiable test voltage is applied to the actuator in a test triggering, and a fluid pressure prevailing in the supply system is detected at least during the test triggering in order to derive information about an operating state of the fuel injector and/or the actuator from the test voltage and the detected fluid pressure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.