Process for calibrating throttle bores, in particular in injection valves for internal combustion engines, and device for executing the process

US6575815B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Juergen Schubert · Dirmstein, DE
• Friedrich Weis · Bamberg, DE

Key dates

• Filing date: Sep 5, 2001
• Grant date: Jun 10, 2003
• Expiry date: Sep 5, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B24B31/116
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

In a process and device for calibrating throttle bores, in particular in injection valves for internal combustion engines, by means of hydroerosive machining of the throttle bore with a suspension, the actual through flow is compared to a predetermined reference through flow. When the actual—and reference through flows coincide, the hydroerosive machining is brought to an end. On the outflow side of the throttle bore, a counterpressure is built up, which prevents the cavitation of the fluid.