Fuel injection valve with integrated spark plug

US6340015B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Walter Benedikt
• Franz Rieger · Aalen, DE
• Rainer Norgauer · Stuttgart, DE

Key dates

• Filing date: May 25, 2000
• Grant date: Jan 22, 2002
• Expiry date: May 25, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M57/06
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection valve (1) having an integrated sparkplug for direct injection of fuel into the combustion chamber of an internal combustion engine and for igniting the fuel injected into the combustion chamber has a valve body (7) which, together with a valve closing body (10) operated by a valve needle (9), forms a seal seat. The valve body (7) and to some extent the valve needle (9) are surrounded radially by an insulating body (6). The insulating body (6) is in turn surrounded radially at least in part by a housing body (2). Ignition electrodes (15, 16) are provided on the valve body (7) and the housing body (2). The valve needle (9) has a first metal guide section (9a) guided in a swirl insert (14), a second metal guide section (9b) guided in the insulating body (6) and an insulating section (9c) arranged between the guide sections (9a, 9b). The guide sections (9a, 9b) are connected in a positive manner to the insulating section (9c).