Method of metering fuel using a fuel injector

US6679222B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Rolf Reischl · Stuttgart, DE
• Wolfgang Ruehle · Ditzingen, DE
• Hubert Stier · Asperg, DE
• Matthias Boee · Ludwigsburg, DE
• Norbert Keim · Besigheim, DE
• Guenther Hohl · Stuttgart, DE

Key dates

• Filing date: Jun 10, 2002
• Grant date: Jan 20, 2004
• Expiry date: Jun 10, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D41/2467
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method of metering fuel with a fuel injector, in particular a fuel injector for fuel injection systems in internal combustion engines is described, having a piezoelectric or magnetostrictive actuator and a valve closing body which is operable by the actuator with a valve lift, cooperating with a valve seat face provided on a valve seat body to form a sealing seat. The valve lift may be adjusted variably as a function of a variable control signal triggering an actuator to produce a variable fuel flow at the sealing seat. To produce afitted curve, the fuel flow of the fuel jet sprayed by the fuel injector is measured as a function of the control signal to produce a fitted curve, and a predetermined fuel flow is set with the control signal by using the fitted curve.