Magnet valve for fuel tank ventilation

US5878991A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Erwin Krimmer · Plüderhausen, DE
• Wolfgang Schulz · Wunstorf, DE
• Tilman Miehle · Weingarten, DE

Key dates

• Filing date: Nov 26, 1997
• Grant date: Mar 9, 1999
• Expiry date: Nov 26, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2025/0845
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A magnet valve having a valve seat body that has a valve opening with a valve seat. A spring-loaded valve member cooperates with the valve seat, in which the valve member forms the magnet armature of an electromagnet and is disposed between the valve seat body, acting as the check yoke of the electromagnet, and a hollow-cylindrical magnet core of the electromagnet. A valve member has a coaxial through opening, and having a damper element, disposed on the valve member, of elastic damping material that forms a sheathlike lining of the through opening that extends outward to cover one face end of the valve member and on the other face end of the valve member protrudes past this valve member, longitudinally continuous axial grooves open toward the through opening are made in the valve member and filled with damping material which protrudes past the second end face of the valve member, in order to assure long-term damping of switching noises.