Fuel injection valve and adjustable gas sleeve forming an annular metering gas gap

US5197672A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Uwe Grytz · Bamberg, DE
• Waldemar Hans · Bamberg, DE
• Frank Rudolf · Neustadt bei Coburg, DE

Key dates

• Filing date: Apr 20, 1992
• Grant date: Mar 30, 1993
• Expiry date: Apr 20, 2012

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M61/1853
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device and method for injecting a fuel-gas mixture. The novel device has an advantage of a simple and exact adjustment of an annular gas gap. The adjustment of the axial extension of a narrow annular gap is effected by varying the axial spacing between the face end of a retaining shoulder on a fuel injection valve and the face end of the bottom part in the region of the annular gas gap of the gas enveloping bushing. The proposed device for injecting a fuel-gas mixture is especially suitable for injection into the intake tube of a mixture-compressing internal combustion engine with externally supply ignition.