Valve for controlling liquids

US6899069B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Patrick Mattes · Stuttgart, DE
• Hans Brekle · Erdmannhausen, DE

Key dates

• Filing date: Aug 16, 2002
• Grant date: May 31, 2005
• Expiry date: Aug 16, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/703
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A valve for controlling fluids, in particular in an injection valve of an internal combustion engine, including a valve housing (20), in which housing a system region (21) is embodied, in which region a piezoelectric actuator module (22) and a hydraulic coupler module (23) are disposed, which has both an adjusting piston (24), on which the actuator module (22) acts, and an actuating piston (30) that is operatively connected via a hydraulic chamber (29) to the adjusting piston (24) and that is connected to a valve closing member (31) cooperating with a valve seat (37), and the adjusting piston (24) and the actuating piston (30) define the hydraulic chamber (29), and a system pressure for refilling the hydraulic chamber (29) prevails in the system region (21), from which a diversion conduit (38) branches off. The system region (21) is acted upon by a fluid via the diversion conduit (38).