Perforated plate and fuel injection valve having a performated plate

US5244154A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Juergen Buchholz · Kaufbeuren, DE
• Martin Maier · Asperg, DE
• Jiri Marek · Reutlingen, DE
• Hans-Peter Trah · Reutlingen, DE

Key dates

• Filing date: Jan 15, 1992
• Grant date: Sep 14, 1993
• Expiry date: Jan 15, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S239/19
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A fuel injection valve including a perforated silicon plate disposed downstream of a valve seat and having an atomization opening that widens in the flow direction. The perforated silicon plate has at least one elongated recess on an upper end face oriented toward the valve seat face; this recess at least partly overlaps a metering opening extending as far as a lower face end of the perforated plate. The perforated plate makes it possible to form flat streams, so that very fine atomization of the injected fuel is attained. Forming the elongated recesses and atomization openings by etching makes high-precision manufacture possible at low production cost. The perforated plate and fuel injection valve are especially suitable for injection systems of mixture-compressing internal combustion engines with externally supplied ignition.