Fuel injection valve

US6422482B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hubert Stier · Asperg, DE
• Guenther Hohl · Stuttgart, DE

Key dates

• Filing date: Sep 21, 2000
• Grant date: Jul 23, 2002
• Expiry date: Sep 21, 2020

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/50
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection valve for a fuel injection system of an internal combustion engines includes a valve closing body cooperating with a valve seat body to form a sealing seat, and a piezoelectric actuator for actuating the valve closing body. The piezoelectric actuator includes piezo layers and one or more temperature compensation layers. The temperature compensation layers have a temperature expansion coefficient having an operational sign opposite the sign of the temperature expansion coefficient of the piezo layers.